技术领域technical field
本公开实施例涉及一种显示面板及其驱动方法、显示装置。Embodiments of the present disclosure relate to a display panel, a driving method thereof, and a display device.
背景技术Background technique
微发光二极管(Micro-LED)显示装置由于可以将发光二极管(LED)的长度微缩至原来的1％例如缩小至100微米(μm)以下以及相比于有机发光二极管(Organic LightEmitting Diode，OLED)显示器件具有更高的发光亮度和发光效率以及更低的运行功耗等优势而逐渐受到人们的广泛关注。由于上述特点，Micro-LED可以适用于手机、显示器、笔记本电脑、数码相机、仪器仪表等具有显示功能的装置。Micro-LED display devices can shrink the length of light-emitting diodes (LEDs) to 1% of the original, for example, to less than 100 microns (μm) and compared with organic light-emitting diodes (Organic LightEmitting Diode, OLED) display Devices have the advantages of higher luminous brightness and luminous efficiency and lower operating power consumption, and have gradually attracted widespread attention. Due to the above characteristics, Micro-LED can be applied to devices with display functions such as mobile phones, monitors, notebook computers, digital cameras, and instruments.
Micro-LED技术，即LED微缩化和矩阵化技术，可以将显示微米等级的红、绿、蓝三色的Micro-LED搬移到阵列基板上。同时，阵列基板上的每一个Micro-LED可以被视为一个单独的像素单元，即能够被单独地驱动点亮，从而使得显示装置呈现出细腻度更高、对比度更强的画面。Micro-LED technology, that is, LED miniaturization and matrix technology, can move Micro-LEDs displaying micron-level red, green and blue colors to array substrates. At the same time, each Micro-LED on the array substrate can be regarded as a single pixel unit, that is, it can be driven to light up independently, so that the display device presents a picture with higher definition and stronger contrast.
发明内容Contents of the invention
本公开至少一实施例提供一种显示面板，包括呈阵列分布的多个像素单元和设置于所述多个像素单元之间的多个光电转换元件。所述多个像素单元每个包括像素电路和发光元件；所述多个光电转换元件每个和与其相邻的至少一个所述像素单元中的所述像素电路和所述发光元件连接，且配置为向与其相连的所述至少一个像素单元的所述像素电路和所述发光元件供电。At least one embodiment of the present disclosure provides a display panel, including a plurality of pixel units distributed in an array and a plurality of photoelectric conversion elements arranged between the plurality of pixel units. Each of the plurality of pixel units includes a pixel circuit and a light emitting element; each of the plurality of photoelectric conversion elements is connected to the pixel circuit and the light emitting element in at least one adjacent pixel unit, and is configured To supply power to the pixel circuit and the light emitting element of the at least one pixel unit connected thereto.
例如，在本公开一实施例提供的显示面板中，所述像素电路包括驱动电路、数据写入电路和存储电路。所述驱动电路包括控制端、第一端和第二端，且配置为控制流经所述第一端和所述第二端的用于驱动所述发光元件发光的驱动电流；所述数据写入电路连接到所述驱动电路的控制端且配置为响应于扫描信号将数据信号写入所述驱动电路的控制端；所述存储电路与所述驱动电路的控制端以及所述驱动电路的第一端连接，且配置为存储所述数据写入电路写入的所述数据信号。For example, in the display panel provided by an embodiment of the present disclosure, the pixel circuit includes a driving circuit, a data writing circuit and a storage circuit. The driving circuit includes a control terminal, a first terminal and a second terminal, and is configured to control a driving current flowing through the first terminal and the second terminal for driving the light-emitting element to emit light; the data writing The circuit is connected to the control terminal of the drive circuit and is configured to write a data signal into the control terminal of the drive circuit in response to a scan signal; the storage circuit and the control terminal of the drive circuit and the first drive circuit The terminals are connected and configured to store the data signal written by the data writing circuit.
例如，在本公开一实施例提供的显示面板中，所述驱动电路包括第一晶体管；所述第一晶体管的栅极作为所述驱动电路的控制端，所述第一晶体管的第一极作为所述驱动电路的第一端，所述第一晶体管的第二极作为所述驱动电路的第二端。For example, in the display panel provided in an embodiment of the present disclosure, the driving circuit includes a first transistor; the gate of the first transistor serves as the control terminal of the driving circuit, and the first electrode of the first transistor serves as The first terminal of the driving circuit and the second pole of the first transistor serve as the second terminal of the driving circuit.
例如，在本公开一实施例提供的显示面板中，所述数据写入电路包括第二晶体管；所述第二晶体管的栅极配置为和扫描信号端连接以接收所述扫描信号，所述第二晶体管的第一极配置为和数据信号端连接以接收所述数据信号，所述第二晶体管的第二极配置为和所述驱动电路的控制端连接。For example, in the display panel provided in an embodiment of the present disclosure, the data writing circuit includes a second transistor; the gate of the second transistor is configured to be connected to a scan signal terminal to receive the scan signal, and the first The first pole of the second transistor is configured to be connected to the data signal terminal to receive the data signal, and the second pole of the second transistor is configured to be connected to the control terminal of the driving circuit.
例如，在本公开一实施例提供的显示面板中，所述存储电路包括存储电容；所述存储电容的第一极配置为和所述驱动电路的控制端连接，所述存储电容的第二极配置为和所述驱动电路的第一端连接。For example, in the display panel provided in an embodiment of the present disclosure, the storage circuit includes a storage capacitor; the first pole of the storage capacitor is configured to be connected to the control terminal of the driving circuit, and the second pole of the storage capacitor configured to be connected to the first end of the drive circuit.
例如，本公开一实施例提供的显示面板，还包括至少一个储能装置，其中，所述至少一个储能装置的每个与至少一个所述光电转换元件连接，且配置为储存所述光电转换元件转换的电能。For example, the display panel provided by an embodiment of the present disclosure further includes at least one energy storage device, wherein each of the at least one energy storage device is connected to at least one of the photoelectric conversion elements, and is configured to store the photoelectric conversion The electrical energy converted by the element.
例如，在本公开一实施例提供的显示面板中，所述储能装置包括蓄电池。For example, in the display panel provided by an embodiment of the present disclosure, the energy storage device includes a battery.
例如，在本公开一实施例提供的显示面板中，所述光电转换元件包括太阳能电池。For example, in the display panel provided by an embodiment of the present disclosure, the photoelectric conversion element includes a solar cell.
例如，在本公开一实施例提供的显示面板中，所述太阳能电池为有机太阳能电池。For example, in the display panel provided by an embodiment of the present disclosure, the solar cell is an organic solar cell.
例如，在本公开一实施例提供的显示面板中，所述多个光电转换元件并联连接。For example, in the display panel provided by an embodiment of the present disclosure, the plurality of photoelectric conversion elements are connected in parallel.
例如，本公开一实施例提供的显示面板，还包括像素界定层，其中，所述像素界定层包括对应于所述发光元件的开口以及对应于所述光电转换元件的开口。For example, the display panel provided by an embodiment of the present disclosure further includes a pixel defining layer, wherein the pixel defining layer includes an opening corresponding to the light emitting element and an opening corresponding to the photoelectric conversion element.
本公开至少一实施例还提供一种显示装置，包括本公开任一实施例提供的显示面板。At least one embodiment of the present disclosure further provides a display device, including the display panel provided by any embodiment of the present disclosure.
例如，本公开一实施例提供的显示装置，还包括多条扫描线和多条数据线。在所述像素电路包括数据写入电路的情况下，所述多条扫描线对应连接到每行像素单元的像素电路的数据写入电路以提供扫描信号；所述多条数据线对应连接到每列像素单元的像素电路的数据写入电路以提供数据信号。For example, the display device provided by an embodiment of the present disclosure further includes a plurality of scanning lines and a plurality of data lines. In the case where the pixel circuit includes a data writing circuit, the plurality of scanning lines are correspondingly connected to the data writing circuit of the pixel circuit of each row of pixel units to provide scanning signals; the plurality of data lines are correspondingly connected to each The data writing circuit of the pixel circuit of the column pixel unit provides the data signal.
本公开至少一实施例还提供一种显示面板的驱动方法，包括：所述光电转换元件将光能转换为电能以向与其相连的所述至少一个像素单元中的像素电路和发光元件供电；所述像素单元中的所述像素电路将驱动电流施加至所述发光元件以使其发光。At least one embodiment of the present disclosure further provides a driving method of a display panel, including: the photoelectric conversion element converts light energy into electrical energy to supply power to the pixel circuit and the light emitting element in the at least one pixel unit connected thereto; The pixel circuit in the pixel unit applies a driving current to the light emitting element to make it emit light.
例如，本公开一实施例提供的显示面板的驱动方法，在所述像素电路包括驱动电路、数据写入电路和存储电路的情况下，所述驱动方法包括：输入扫描信号和数据信号，开启所述数据写入电路和所述驱动电路，所述数据写入电路将所述数据信号写入所述存储电路，所述驱动电路根据所述数据信号将驱动电流施加至所述发光元件以使其发光。For example, in the driving method of a display panel provided by an embodiment of the present disclosure, when the pixel circuit includes a driving circuit, a data writing circuit and a storage circuit, the driving method includes: inputting a scanning signal and a data signal, turning on the The data writing circuit and the driving circuit, the data writing circuit writes the data signal into the storage circuit, and the driving circuit applies a driving current to the light emitting element according to the data signal to make it glow.
附图说明Description of drawings
为了更清楚地说明本公开实施例的技术方案，下面将对实施例的附图作简单地介绍，显而易见地，下面描述中的附图仅仅涉及本公开的一些实施例，而非对本公开的限制。In order to illustrate the technical solutions of the embodiments of the present disclosure more clearly, the accompanying drawings of the embodiments will be briefly introduced below. Obviously, the accompanying drawings in the following description only relate to some embodiments of the present disclosure, rather than limiting the present disclosure .
图1A为一种2T1C像素电路的示意图；FIG. 1A is a schematic diagram of a 2T1C pixel circuit;
图1B为另一种2T1C像素电路的示意图；FIG. 1B is a schematic diagram of another 2T1C pixel circuit;
图2为本公开一实施例提供的一种显示面板的示意框图；FIG. 2 is a schematic block diagram of a display panel provided by an embodiment of the present disclosure;
图3为图2中所示的显示面板的具体结构的一个示例的示意框图；FIG. 3 is a schematic block diagram of an example of a specific structure of the display panel shown in FIG. 2;
图4为图3中所示的显示面板的一种具体实现示例的电路结构图；FIG. 4 is a circuit structure diagram of a specific implementation example of the display panel shown in FIG. 3;
图5为本公开一实施例提供的一种显示面板的储能装置的连接示意框图；Fig. 5 is a schematic block diagram of connection of an energy storage device of a display panel provided by an embodiment of the present disclosure;
图6本公开一实施例提供的一种显示面板的像素界定层的平面结构示意图；FIG. 6 is a schematic plan view of a pixel defining layer of a display panel provided by an embodiment of the present disclosure;
图7为本公开一实施例提供的驱动方法的时序图；FIG. 7 is a timing diagram of a driving method provided by an embodiment of the present disclosure;
图8为图4中所示的显示面板对应于图7中所示的第一阶段的电路示意图；8 is a schematic circuit diagram of the display panel shown in FIG. 4 corresponding to the first stage shown in FIG. 7;
图9为图4中所示的显示面板对应于图7中所示的第二阶段的电路示意图；9 is a schematic circuit diagram of the display panel shown in FIG. 4 corresponding to the second stage shown in FIG. 7;
图10为本公开一实施例提供的另一种显示面板的电路图；以及FIG. 10 is a circuit diagram of another display panel provided by an embodiment of the present disclosure; and
图11为本公开一实施例提供的一种显示装置的示意图。FIG. 11 is a schematic diagram of a display device provided by an embodiment of the present disclosure.
具体实施方式Detailed ways
为使本公开实施例的目的、技术方案和优点更加清楚，下面将结合本公开实施例的附图，对本公开实施例的技术方案进行清楚、完整地描述。显然，所描述的实施例是本公开的一部分实施例，而不是全部的实施例。基于所描述的本公开的实施例，本领域普通技术人员在无需创造性劳动的前提下所获得的所有其他实施例，都属于本公开保护的范围。In order to make the purpose, technical solutions and advantages of the embodiments of the present disclosure clearer, the technical solutions of the embodiments of the present disclosure will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present disclosure. Apparently, the described embodiments are some of the embodiments of the present disclosure, not all of them. Based on the described embodiments of the present disclosure, all other embodiments obtained by persons of ordinary skill in the art without creative effort fall within the protection scope of the present disclosure.
除非另外定义，本公开使用的技术术语或者科学术语应当为本公开所属领域内具有一般技能的人士所理解的通常意义。本公开中使用的“第一”、“第二”以及类似的词语并不表示任何顺序、数量或者重要性，而只是用来区分不同的组成部分。同样，“一个”、“一”或者“该”等类似词语也不表示数量限制，而是表示存在至少一个。“包括”或者“包含”等类似的词语意指出现该词前面的元件或者物件涵盖出现在该词后面列举的元件或者物件及其等同，而不排除其他元件或者物件。“连接”或者“相连”等类似的词语并非限定于物理的或者机械的连接，而是可以包括电性的连接，不管是直接的还是间接的。“上”、“下”、“左”、“右”等仅用于表示相对位置关系，当被描述对象的绝对位置改变后，则该相对位置关系也可能相应地改变。Unless otherwise defined, the technical terms or scientific terms used in the present disclosure shall have the usual meanings understood by those skilled in the art to which the present disclosure belongs. "First", "second" and similar words used in the present disclosure do not indicate any order, quantity or importance, but are only used to distinguish different components. Likewise, words like "a", "an" or "the" do not denote a limitation of quantity, but mean that there is at least one. "Comprising" or "comprising" and similar words mean that the elements or items appearing before the word include the elements or items listed after the word and their equivalents, without excluding other elements or items. Words such as "connected" or "connected" are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "Up", "Down", "Left", "Right" and so on are only used to indicate the relative positional relationship. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.
Micro-LED显示装置或OLED显示装置中使用的基础像素电路通常为2T1C像素电路，即利用两个薄膜晶体管(Thin-Film Transistor，TFT)和一个存储电容Cs来实现驱动发光元件LED发光的基本功能。图1A和图1B分别为示出了两种2T1C像素电路的示意图。The basic pixel circuit used in Micro-LED display devices or OLED display devices is usually a 2T1C pixel circuit, which uses two thin-film transistors (Thin-Film Transistor, TFT) and a storage capacitor Cs to realize the basic function of driving the light-emitting element LED to emit light . FIG. 1A and FIG. 1B are respectively schematic diagrams showing two kinds of 2T1C pixel circuits.
如图1A所示，一种2T1C像素电路包括开关晶体管T0、驱动晶体管N0以及存储电容Cs。例如，该开关晶体管T0的栅极连接扫描线以接收扫描信号Scan1，例如源极连接到数据线以接收数据信号Vdata，漏极连接到驱动晶体管N0的栅极；驱动晶体管N0的源极连接到第一电压端以接收第一电压Vdd(高电压)，漏极连接到LED的正极端；存储电容Cs的一端连接到开关晶体管T0的漏极以及驱动晶体管N0的栅极，另一端连接到驱动晶体管N0的源极以及第一电压端；LED的负极端连接到第二电压端以接收第二电压Vss(低电压，例如接地电压)。该2T1C像素电路的驱动方式是将像素的明暗(灰阶)经由两个TFT和存储电容Cs来控制。当通过扫描线施加扫描信号Scan1以开启开关晶体管T0时，数据驱动电路通过数据线送入的数据信号Vdata将经由开关晶体管T0对存储电容Cs充电，由此将数据信号Vdata存储在存储电容Cs中，且此存储的数据信号Vdata控制驱动晶体管N0的导通程度，由此控制流过驱动晶体管以驱动LED发光的电流大小，即此电流决定该像素单元发光的灰阶。在图1A所示的2T1C像素电路中，开关晶体管T0为N型晶体管而驱动晶体管N0为P型晶体管。As shown in FIG. 1A , a 2T1C pixel circuit includes a switching transistor T0 , a driving transistor N0 and a storage capacitor Cs. For example, the gate of the switch transistor T0 is connected to the scan line to receive the scan signal Scan1, for example, the source is connected to the data line to receive the data signal Vdata, and the drain is connected to the gate of the driving transistor N0; the source of the driving transistor N0 is connected to The first voltage end is to receive the first voltage Vdd (high voltage), and the drain is connected to the positive end of the LED; one end of the storage capacitor Cs is connected to the drain of the switching transistor T0 and the gate of the driving transistor N0, and the other end is connected to the driving The source of the transistor N0 and the first voltage terminal; the negative terminal of the LED are connected to the second voltage terminal to receive the second voltage Vss (low voltage, such as ground voltage). The driving method of the 2T1C pixel circuit is to control the brightness (gray scale) of the pixel through two TFTs and the storage capacitor Cs. When the scan signal Scan1 is applied through the scan line to turn on the switch transistor T0, the data signal Vdata sent by the data drive circuit through the data line will charge the storage capacitor Cs through the switch transistor T0, thereby storing the data signal Vdata in the storage capacitor Cs , and the stored data signal Vdata controls the conduction degree of the driving transistor N0, thereby controlling the magnitude of the current flowing through the driving transistor to drive the LED to emit light, that is, the current determines the gray scale of the pixel unit emitting light. In the 2T1C pixel circuit shown in FIG. 1A , the switching transistor T0 is an N-type transistor and the driving transistor N0 is a P-type transistor.
如图1B所示，另一种2T1C像素电路也包括开关晶体管T0、驱动晶体管N0以及存储电容Cs，但是其连接方式略有改变，且驱动晶体管N0为N型晶体管。图1B的像素电路相对于图1A的变化之处包括：LED的正极端连接到第一电压端以接收第一电压Vdd(高电压)，而负极端连接到驱动晶体管N0的漏极，驱动晶体管N0的源极连接到第二电压端以接收第二电压Vss(低电压，例如接地电压)。存储电容Cs的一端连接到开关晶体管T0的漏极以及驱动晶体管N0的栅极，另一端连接到驱动晶体管N0的源极以及第二电压端。该2T1C像素电路的工作方式基本上与图1A所示的像素电路基本相同，这里不再赘述。As shown in FIG. 1B , another 2T1C pixel circuit also includes a switching transistor T0 , a driving transistor N0 and a storage capacitor Cs, but the connection method is slightly changed, and the driving transistor N0 is an N-type transistor. The changes of the pixel circuit in FIG. 1B relative to FIG. 1A include: the positive terminal of the LED is connected to the first voltage terminal to receive the first voltage Vdd (high voltage), and the negative terminal is connected to the drain of the driving transistor N0, and the driving transistor The source of N0 is connected to the second voltage terminal to receive the second voltage Vss (low voltage, such as ground voltage). One end of the storage capacitor Cs is connected to the drain of the switching transistor T0 and the gate of the driving transistor N0 , and the other end is connected to the source of the driving transistor N0 and the second voltage end. The working mode of the 2T1C pixel circuit is basically the same as that of the pixel circuit shown in FIG. 1A , and will not be repeated here.
此外，对于图1A和图1B所示的像素电路，开关晶体管T0不限于N型晶体管，也可以为P型晶体管，由此控制其导通或截止的扫描信号Scan1的极性进行相应地改变即可。In addition, for the pixel circuits shown in FIG. 1A and FIG. 1B , the switch transistor T0 is not limited to an N-type transistor, and can also be a P-type transistor, so that the polarity of the scanning signal Scan1 that controls its turn-on or cut-off is changed accordingly, that is, Can.
Micro-LED显示装置通常包括多个按阵列排布的像素单元，每个像素单元例如可以包括上述像素电路。在Micro-LED显示装置中，第一电压Vdd(例如高电压)和第二电压Vss(低电压，例如接地电压)在从集成电路(Integrated Circuit，IC)输出并传送至像素单元的过程中，由于走线上有电阻，走线中会有电流流过，产生电能损耗，从而引起第一电压Vdd的电压压降，第二电压Vss的电压压升，从而会使得在近IC端和远IC端的LED的两端的电压或流过该LED的电流存在偏差，从而导致显示屏幕在近IC端和远IC端存在亮度偏差，影响显示画面。A Micro-LED display device generally includes a plurality of pixel units arranged in an array, and each pixel unit may include the above-mentioned pixel circuit, for example. In the Micro-LED display device, the first voltage Vdd (such as a high voltage) and the second voltage Vss (low voltage, such as a ground voltage) are output from an integrated circuit (Integrated Circuit, IC) and transmitted to the pixel unit, Due to the resistance on the wiring, there will be current flowing in the wiring, resulting in power loss, which will cause the voltage drop of the first voltage Vdd and the voltage rise of the second voltage Vss, which will make the terminal near the IC and the far IC There is a deviation in the voltage between the two ends of the LED at the end or the current flowing through the LED, resulting in a brightness deviation between the near IC end and the far IC end of the display screen, which affects the display screen.
本公开至少一实施例提供一种显示面板，包括呈阵列分布的多个像素单元和设置于多个像素单元之间的多个光电转换元件。多个像素单元每个包括像素电路和发光元件；多个光电转换元件每个和与其相邻的至少一个像素单元中的像素电路和发光元件连接，且配置为向与其相连的至少一个像素单元的像素电路和发光元件供电。At least one embodiment of the present disclosure provides a display panel, including a plurality of pixel units distributed in an array and a plurality of photoelectric conversion elements arranged between the plurality of pixel units. Each of the plurality of pixel units includes a pixel circuit and a light-emitting element; each of the plurality of photoelectric conversion elements is connected to the pixel circuit and the light-emitting element in at least one pixel unit adjacent to it, and is configured to connect to at least one pixel unit connected to it. Pixel circuits and light emitting elements are powered.
本公开至少一实施例还提供对应于上述显示面板的驱动方法和显示装置。At least one embodiment of the present disclosure further provides a driving method and a display device corresponding to the above-mentioned display panel.
本公开至少一实施例提供的显示面板及其驱动方法、显示装置，一方面，由于显示面板中的光电转换元件距离像素电路很近，可以减少传输电压的走线的电阻，从而避免了电能损耗和走线电阻引起的对高电压的电压压降和对低电压的电压压升的问题，提高了显示面板的显示质量；另一方面，通过使用光电转换元件将光能转换为电能以实现可再生能源的有效利用，从而节约了电能，减少了对环境的污染。The display panel, its driving method, and the display device provided by at least one embodiment of the present disclosure, on the one hand, since the photoelectric conversion element in the display panel is very close to the pixel circuit, the resistance of the wiring for transmitting voltage can be reduced, thereby avoiding power loss The problem of voltage drop to high voltage and voltage rise to low voltage caused by wiring resistance improves the display quality of the display panel; on the other hand, by using photoelectric conversion elements to convert light energy into electrical energy to achieve The effective use of renewable energy saves electricity and reduces environmental pollution.
下面结合附图对本公开的实施例及其示例进行详细说明。需要注意的是，不同的附图中相同的附图标记用于指代已描述的相同的元件。Embodiments and examples of the present disclosure will be described in detail below in conjunction with the accompanying drawings. It should be noted that the same reference numerals are used in different drawings to refer to the same elements already described.
图2为本公开实施例的一个示例提供一种显示面板11的示意框图。如图2所示，该显示面板11包括呈阵列分布的多个像素单元111和设置于多个像素单元111之间的多个光电转换元件112。FIG. 2 provides a schematic block diagram of a display panel 11 as an example of an embodiment of the present disclosure. As shown in FIG. 2 , the display panel 11 includes a plurality of pixel units 111 distributed in an array and a plurality of photoelectric conversion elements 112 arranged between the plurality of pixel units 111 .
例如，该光电转换元件112能够把光能(例如包括太阳光、环境光(灯光)以及显示装置自己发出的光等)转化为电能，从而可以为显示装置供电，进而降低了显示装置的能源消耗。而且，光能是可再生能源，因此利用光电转换元件112进行供电既节约了能源又不会对环境产生污染。例如，该光电转换元件112为太阳能电池，该太阳能电池例如为无机太阳能电池或有机太阳能电池，从而分别与Micro-LED显示面板或者用于OLED显示面板在制备工艺上相兼容。例如，太阳能电池利用半导体PN结的光电效应把太阳光的光能转化为电能。例如，可以产生光电效应的无机材料有单晶硅、多晶硅、非晶硅、砷化镓以及硒铟铜等，本公开的实施例对此不作限制。有机太阳能电池包括染料敏化太阳能电池、全有机太阳能电池、高分子掺杂无机纳米粒子太阳能电池等，本公开的实施例对此不作限制。For example, the photoelectric conversion element 112 can convert light energy (such as sunlight, ambient light (light) and light emitted by the display device itself) into electrical energy, so as to provide power for the display device, thereby reducing the energy consumption of the display device. . Moreover, light energy is a renewable energy source, so using the photoelectric conversion element 112 to supply power saves energy and does not pollute the environment. For example, the photoelectric conversion element 112 is a solar cell, such as an inorganic solar cell or an organic solar cell, so that it is compatible with the Micro-LED display panel or the OLED display panel in terms of manufacturing process. For example, solar cells use the photoelectric effect of semiconductor PN junctions to convert the light energy of sunlight into electrical energy. For example, the inorganic materials that can generate the photoelectric effect include monocrystalline silicon, polycrystalline silicon, amorphous silicon, gallium arsenide, indium copper selenide, etc., which are not limited in the embodiments of the present disclosure. Organic solar cells include dye-sensitized solar cells, all-organic solar cells, polymer-doped inorganic nanoparticle solar cells, etc., which are not limited by embodiments of the present disclosure.
如图2所示，多个像素单元111每个包括像素电路10和发光元件20。该像素电路10例如用于Micro-LED显示面板的子像素或者用于OLED显示面板的子像素。例如，该像素电路10配置为控制流经发光元件20的驱动电流以驱动发光元件20进行发光。在本公开的至少一个实施例中，Micro-LED显示面板例如通过硅衬底制备，OLED显示面板例如通过玻璃衬底制备，具体结构与制备工艺可以采用本领域中的常规方法，这里不再详述，且本公开的实施例对此不作限制。As shown in FIG. 2 , each of the plurality of pixel units 111 includes a pixel circuit 10 and a light emitting element 20 . The pixel circuit 10 is, for example, used for a sub-pixel of a Micro-LED display panel or a sub-pixel of an OLED display panel. For example, the pixel circuit 10 is configured to control the driving current flowing through the light emitting element 20 to drive the light emitting element 20 to emit light. In at least one embodiment of the present disclosure, the Micro-LED display panel is prepared by, for example, a silicon substrate, and the OLED display panel is, for example, prepared by a glass substrate. The specific structure and preparation process can be conventional methods in the field, which will not be detailed here. described above, and the embodiments of the present disclosure are not limited thereto.
如图2所示，多个光电转换元件112每个和与其相邻的至少一个像素单元111中的像素电路10和发光元件20连接，且配置为向与其相连的至少一个像素单元111的像素电路10和发光元件20供电。例如，一个光电转换元件112可以仅和一个像素单元111中的一个像素电路10和一个发光元件20连接，可以和多个像素单元111中的多个像素电路10和多个发光元件20连接，本公开的实施例对此不作限制。例如，该光电转换元件112提供的电压在像素电路10的控制下流经发光元件20以驱动该发光元件20进行发光。As shown in FIG. 2 , each of the plurality of photoelectric conversion elements 112 is connected to the pixel circuit 10 and the light emitting element 20 in at least one pixel unit 111 adjacent to it, and is configured to provide a signal to the pixel circuit of at least one pixel unit 111 connected to it. 10 and light emitting element 20 to supply power. For example, one photoelectric conversion element 112 may only be connected to one pixel circuit 10 and one light emitting element 20 in one pixel unit 111, or may be connected to multiple pixel circuits 10 and multiple light emitting elements 20 in multiple pixel units 111. The disclosed embodiments are not limited in this regard. For example, the voltage provided by the photoelectric conversion element 112 flows through the light emitting element 20 under the control of the pixel circuit 10 to drive the light emitting element 20 to emit light.
需要注意的是，为了表示清楚、简洁，图2中仅示出了一个光电转换元件112与至少一个像素单元111的连接结构，不限于此，显示面板11中还可以包括多个这样的连接结构，本公开的实施例对此不作限制。另需要注意的是，为表示清楚、简洁，并没有给出该显示面板11的全部结构。为实现显示面板的必要功能，本领域技术人员可以根据具体应用场景进行设置其他未示出的结构，本发明的实施例对此不做限制。It should be noted that, for the sake of clarity and brevity, FIG. 2 only shows the connection structure between one photoelectric conversion element 112 and at least one pixel unit 111, and is not limited thereto. The display panel 11 may also include multiple such connection structures. , which is not limited by the embodiments of the present disclosure. It should also be noted that, for the sake of clarity and brevity, the entire structure of the display panel 11 is not given. In order to realize the necessary functions of the display panel, those skilled in the art may configure other unshown structures according to specific application scenarios, which are not limited in the embodiments of the present invention.
由于该光电转换元件112与像素电路10和发光元件20的距离很近，因此，该光电转换元件112转换的电能可以避免借助很长的走线进行传输，从而可以减少传输电压的走线的电阻，从而避免了电能损耗和走线电阻引起的对高电压的电压压降和对低电压电压压升的问题，提高了显示面板的显示质量，同时，该光电转换元件112可以将光能转换为电能以实现可再生能源的有效利用，从而节约了电能，减少了对环境的污染。Since the photoelectric conversion element 112 is very close to the pixel circuit 10 and the light-emitting element 20, the electric energy converted by the photoelectric conversion element 112 can avoid being transmitted through a very long wiring, thereby reducing the resistance of the wiring for transmitting voltage. , so as to avoid the problems of voltage drop to high voltage and voltage rise to low voltage caused by power loss and wire resistance, and improve the display quality of the display panel. At the same time, the photoelectric conversion element 112 can convert light energy into Electric energy is used to realize the effective use of renewable energy, thereby saving electric energy and reducing environmental pollution.
图3为图2中所示的显示面板的具体结构的一个示例的示意框图。如图3所示，该显示面板11中像素电路10包括驱动电路100、数据写入电路200和存储电路300。FIG. 3 is a schematic block diagram of an example of a specific structure of the display panel shown in FIG. 2 . As shown in FIG. 3 , the pixel circuit 10 in the display panel 11 includes a driving circuit 100 , a data writing circuit 200 and a storage circuit 300 .
驱动电路100包括控制端130、第一端110和第二端120，且配置为控制流经第一端110和第二端120的用于驱动发光元件20发光的驱动电流。驱动电路100的控制端130和第一节点N1连接，驱动电路100的第一端110和第二节点N2连接，例如该第二节点N2和存储电路300以及光电转换元件112的第一端1121(例如提供高电平)连接以接收光电转换元件112提供的电能，驱动电路100的第二端120与发光元件20连接。例如，驱动电路100可以控制流经发光元件20的驱动电流以驱动发光元件20进行发光，且可以根据需要的“灰度”发光。例如，该驱动电流由光电转换元件112提供。例如，发光元件20可以采用LED，且配置为和驱动电路100的第二端120以及光电转换元件112的第二端1122(例如，提供低电平)连接，本公开的实施例包括但不限于此情形。The driving circuit 100 includes a control terminal 130 , a first terminal 110 and a second terminal 120 , and is configured to control a driving current flowing through the first terminal 110 and the second terminal 120 for driving the light emitting element 20 to emit light. The control terminal 130 of the driving circuit 100 is connected to the first node N1, and the first terminal 110 of the driving circuit 100 is connected to the second node N2, for example, the second node N2 is connected to the storage circuit 300 and the first terminal 1121 of the photoelectric conversion element 112 ( For example, a high level connection is provided to receive the electric energy provided by the photoelectric conversion element 112 , and the second end 120 of the driving circuit 100 is connected to the light emitting element 20 . For example, the driving circuit 100 can control the driving current flowing through the light emitting element 20 to drive the light emitting element 20 to emit light, and can emit light according to the required "gray scale". For example, this drive current is supplied from the photoelectric conversion element 112 . For example, the light-emitting element 20 can be an LED, and is configured to be connected to the second end 120 of the driving circuit 100 and the second end 1122 of the photoelectric conversion element 112 (for example, to provide a low level). Embodiments of the present disclosure include but are not limited to This situation.
例如，数据写入电路200与驱动电路100的控制端130(第一节点N1)连接，且配置为响应于扫描信号将数据信号写入驱动电路100的控制端130。例如，数据写入电路200分别和数据线(数据信号端Vdata)、第一节点N1以及扫描线(扫描信号端Gate)连接。例如，来自扫描信号端Gate的扫描信号被施加至数据写入电路200以控制数据写入电路200开启与否。例如，数据写入电路200可以响应于扫描信号而开启，从而可以将数据信号Vdata写入驱动电路100的控制端130(第一节点N1)，然后可将数据信号Vdata存储在存储电路300中，以根据该数据信号Vdata生成驱动发光元件20发光的驱动电流。例如，该数据信号Vdata的大小决定了该像素单元显示的的灰度。For example, the data writing circuit 200 is connected to the control terminal 130 (the first node N1 ) of the driving circuit 100 and is configured to write a data signal into the control terminal 130 of the driving circuit 100 in response to a scan signal. For example, the data writing circuit 200 is respectively connected to the data line (data signal terminal Vdata), the first node N1 and the scan line (scan signal terminal Gate). For example, the scan signal from the scan signal terminal Gate is applied to the data writing circuit 200 to control whether the data writing circuit 200 is turned on or not. For example, the data writing circuit 200 can be turned on in response to the scanning signal, so that the data signal Vdata can be written into the control terminal 130 (the first node N1) of the driving circuit 100, and then the data signal Vdata can be stored in the storage circuit 300, A driving current for driving the light emitting element 20 to emit light is generated according to the data signal Vdata. For example, the magnitude of the data signal Vdata determines the grayscale displayed by the pixel unit.
例如，存储电路300与驱动电路100的控制端130(第一节点N1)以及驱动电路100的第一端110(第二节点N2)连接，配置为存储数据写入电路200写入的数据信号Vdata。例如，存储电路300可以存储该数据信号Vdata并利用存储的数据信号Vdata对驱动电路100进行控制。例如，在存储电路300包括存储电容的情形下，存储电路300可以将数据写入电路200写入的数据信号Vdata存储在存储电容中，从而在例如发光阶段时可以利用存储的包括数据信号Vdata的电压对驱动电路100进行控制。For example, the storage circuit 300 is connected to the control terminal 130 (the first node N1) of the driving circuit 100 and the first terminal 110 (the second node N2) of the driving circuit 100, and is configured to store the data signal Vdata written by the data writing circuit 200 . For example, the storage circuit 300 can store the data signal Vdata and use the stored data signal Vdata to control the driving circuit 100 . For example, in the case that the storage circuit 300 includes a storage capacitor, the storage circuit 300 can store the data signal Vdata written by the data writing circuit 200 in the storage capacitor, so that the stored data signal Vdata can be used during, for example, the light-emitting phase. The voltage controls the drive circuit 100 .
如图3所示，该显示面板11中发光元件20包括第一端21和第二端22，发光元件20的第一端21配置为从驱动电路100的第二端120接收驱动电流，发光元件20的第二端22配置为与光电转换元件112的第二端1122(例如提供低电平)连接。As shown in FIG. 3 , the light-emitting element 20 in the display panel 11 includes a first end 21 and a second end 22, the first end 21 of the light-emitting element 20 is configured to receive a driving current from the second end 120 of the driving circuit 100, and the light-emitting element The second terminal 22 of 20 is configured to be connected to the second terminal 1122 of the photoelectric conversion element 112 (for example, to provide a low level).
如图3所示，该显示面板11中光电转换元件112包括第一端1121和第二端1122。例如，在该示例中，光电转换元件112的第一端1121与驱动电路100的第一端110(第一节点N1)和存储电路300连接以提供第一电压(例如该第一电压为高电平)；光电转换元件112的第二端1122与发光元件20的第二端22连接以提供第二电压(例如，该第二电压为低电平)。As shown in FIG. 3 , the photoelectric conversion element 112 in the display panel 11 includes a first end 1121 and a second end 1122 . For example, in this example, the first terminal 1121 of the photoelectric conversion element 112 is connected to the first terminal 110 (first node N1) of the driving circuit 100 and the storage circuit 300 to provide a first voltage (for example, the first voltage is a high voltage level); the second end 1122 of the photoelectric conversion element 112 is connected to the second end 22 of the light emitting element 20 to provide a second voltage (for example, the second voltage is a low level).
需要说明的是，本公开的各实施例中的光电转换元件112的第一端1121例如保持输入直流高电平信号，将该直流高电平称为第一电压，光电转换元件112的第二端1122例如保持输入直流低电平信号，将该直流低电平称为第二电压；且第二电压低于第一电压。以下各实施例与此相同，不再赘述。It should be noted that, in each embodiment of the present disclosure, the first terminal 1121 of the photoelectric conversion element 112 keeps inputting a DC high level signal, and the DC high level is called the first voltage, and the second terminal 1121 of the photoelectric conversion element 112 Terminal 1122, for example, keeps inputting a DC low level signal, and the DC low level is called a second voltage; and the second voltage is lower than the first voltage. The following embodiments are the same as this and will not be repeated here.
需要说明的是，在本公开的各实施例的描述中，符号Vdata既可以表示数据信号端又可以表示数据信号的电平，以下各实施例与此相同，不再赘述。It should be noted that, in the descriptions of the embodiments of the present disclosure, the symbol Vdata may represent both the data signal terminal and the level of the data signal, and the following embodiments are the same and will not be repeated here.
由于该光电转换元件112与像素电路10和发光元件20的距离很近，因此，该光电转换元件112转换的电能可以避免借助很长的走线进行传输，从而可以减少传输电压的走线的电阻，从而避免了电能损耗和走线电阻引起的对高电压的电压压降和对低电压电压压升的问题，提高了显示面板的显示质量，同时，通过该光电转换元件112向驱动电路100的第一端110提供第一电压，向发光元件20的第二端22提供第二电压，因此实现了光能的有效利用，从而节约了资源。Since the photoelectric conversion element 112 is very close to the pixel circuit 10 and the light-emitting element 20, the electric energy converted by the photoelectric conversion element 112 can avoid being transmitted through a very long wiring, thereby reducing the resistance of the wiring for transmitting voltage. , so as to avoid the problems of voltage drop to high voltage and voltage rise to low voltage caused by power loss and wire resistance, and improve the display quality of the display panel. The first terminal 110 provides the first voltage, and supplies the second voltage to the second terminal 22 of the light-emitting element 20 , thus realizing effective utilization of light energy and saving resources.
图4为图3中所示的显示面板的一种具体实现示例的电路结构图。如图4所示，该显示面板11包括像素电路10、发光元件LED和光电转换元件112。如图4所示，该像素电路10包括：第一和第二晶体管T1、T2以及包括存储电容C。例如，第一晶体管T1被用作驱动晶体管，第二晶体管T2被用作开关晶体管。例如，发光元件LED可以为各种类型，例如顶发射、底发射、双侧发射等，可以发红光、绿光或蓝光等，本公开的实施例对此不作限制。FIG. 4 is a circuit structure diagram of a specific implementation example of the display panel shown in FIG. 3 . As shown in FIG. 4 , the display panel 11 includes a pixel circuit 10 , a light emitting element LED and a photoelectric conversion element 112 . As shown in FIG. 4 , the pixel circuit 10 includes: first and second transistors T1 and T2 and a storage capacitor C. For example, the first transistor T1 is used as a driving transistor, and the second transistor T2 is used as a switching transistor. For example, the light-emitting element LED can be of various types, such as top emission, bottom emission, double-side emission, etc., and can emit red light, green light, or blue light, and the embodiments of the present disclosure are not limited thereto.
例如，如图4所示，更详细地，驱动电路100可以实现为第一晶体管T1。第一晶体管T1的栅极作为驱动电路100的控制端130，和第一节点N1连接；第一晶体管T1的第一极作为驱动电路100的第一端110，和第二节点N2连接；第一晶体管T1的第二极作为驱动电路100的第二端120，和发光元件LED连接。需要注意的是，不限于此，驱动电路100也可以是由其他的组件组成的电路，以实现相应的功能。For example, as shown in FIG. 4 , in more detail, the driving circuit 100 may be implemented as a first transistor T1 . The gate of the first transistor T1 serves as the control terminal 130 of the drive circuit 100 and is connected to the first node N1; the first pole of the first transistor T1 serves as the first terminal 110 of the drive circuit 100 and is connected to the second node N2; The second pole of the transistor T1 serves as the second terminal 120 of the driving circuit 100 and is connected to the light emitting element LED. It should be noted that, it is not limited thereto, and the driving circuit 100 may also be a circuit composed of other components to realize corresponding functions.
数据写入电路200可以实现为第二晶体管T2。第二晶体管T2的栅极配置为和扫描信号端Gate连接以接收扫描信号，第二晶体管T2的第一极配置为和数据信号端Vdata连接以接收数据信号，第二晶体管T2的第二极配置为和驱动电路100的控制端130(即第一节点N1)连接。需要注意的是，不限于此，数据写入电路200也可以是由其他的组件组成的电路。The data writing circuit 200 may be implemented as a second transistor T2. The gate of the second transistor T2 is configured to be connected to the scan signal terminal Gate to receive the scan signal, the first pole of the second transistor T2 is configured to be connected to the data signal terminal Vdata to receive the data signal, and the second pole of the second transistor T2 is configured to It is connected to the control terminal 130 of the driving circuit 100 (that is, the first node N1). It should be noted that it is not limited thereto, and the data writing circuit 200 may also be a circuit composed of other components.
存储电路300可以实现为存储电容C。存储电容C的第一极配置为和驱动电路100的控制端130(即第一节点N1)连接，存储电容C的第二极配置为和驱动电路100的第一端(即第二节点N2)连接。需要注意的是，不限于此，存储电路300也可以是由其他的组件组成的电路，以实现相应的功能。The storage circuit 300 may be implemented as a storage capacitor C. The first pole of the storage capacitor C is configured to be connected to the control terminal 130 of the drive circuit 100 (ie, the first node N1), and the second pole of the storage capacitor C is configured to be connected to the first end of the drive circuit 100 (ie, the second node N2) connect. It should be noted that it is not limited thereto, and the storage circuit 300 may also be a circuit composed of other components to realize corresponding functions.
需要说明的是，在本公开的实施例中，第一节点N1和第二节点N2并非表示实际存在的部件，而是表示电路图中相关电连接的汇合点。It should be noted that, in the embodiment of the present disclosure, the first node N1 and the second node N2 do not represent actual existing components, but represent a confluence point of related electrical connections in the circuit diagram.
需要注意的是，本公开实施例中的像素电路的结构不限于图3或图4中所示的电路结构，还可以进一步包括具有阈值电压补偿功能的各种像素电路例如可以是4T1C、4T2C或8T1C等其他像素电路，本公开的实施例对此不作限制。It should be noted that the structure of the pixel circuit in the embodiment of the present disclosure is not limited to the circuit structure shown in FIG. 3 or FIG. 4 , and may further include various pixel circuits with a threshold voltage compensation function, such as 4T1C, 4T2C or Other pixel circuits such as 8T1C are not limited in the embodiments of the present disclosure.
本公开实施例提供的显示面板还可以包括至少一个储能装置。图5示出了本公开一实施例提供的一种显示面板的储能装置的连接示意框图。如图5所示，该至少一个储能装置113的每个与至少一个光电转换元件112连接，且配置为储存光电转换元件转换的电能。The display panel provided by the embodiments of the present disclosure may further include at least one energy storage device. Fig. 5 shows a schematic block diagram of connection of an energy storage device of a display panel provided by an embodiment of the present disclosure. As shown in FIG. 5 , each of the at least one energy storage device 113 is connected to at least one photoelectric conversion element 112 and is configured to store electrical energy converted by the photoelectric conversion element.
如图5所示，该多个光电转换元件112并联连接，且与储能装置113连接以将其转化的电能储存在储能装置113中。例如，储能装置113将从多个光电转换元件112中接收的电能转换为化学能储存起来，以在显示面板的使用环境没有光或光照不足的条件下，即光电转换元件112不工作或工作状态不理想的情况下，将该化学能再转化为电能为像素单元11中的像素电路和发光元件20(图中未示出)进行供电，从而使得该显示面板在没有光或光照不足的条件下也可以进行正常显示，保证了显示装置显示的稳定性。例如，储能装置113可以为蓄电池，例如锂电子电池、镍镉电池等。As shown in FIG. 5 , the plurality of photoelectric conversion elements 112 are connected in parallel and connected to an energy storage device 113 to store the converted electrical energy in the energy storage device 113 . For example, the energy storage device 113 converts the electrical energy received from the plurality of photoelectric conversion elements 112 into chemical energy and stores them, so that the photoelectric conversion elements 112 do not work or work when there is no light or insufficient light in the use environment of the display panel. In the case of an unsatisfactory state, the chemical energy is converted into electrical energy to supply power to the pixel circuit in the pixel unit 11 and the light-emitting element 20 (not shown in the figure), so that the display panel can operate under the condition of no light or insufficient light. Normal display can also be performed under the screen, which ensures the stability of the display of the display device. For example, the energy storage device 113 may be a storage battery, such as a lithium-ion battery, a nickel-cadmium battery, or the like.
例如，图5所示的显示面板11还包括与光电转换元件112连接的至少一个像素单元11中的像素电路10和发光元件20，为了表示清楚、简洁，该像素电路10和发光元件20在图5中未示出。For example, the display panel 11 shown in FIG. 5 also includes a pixel circuit 10 and a light-emitting element 20 in at least one pixel unit 11 connected to the photoelectric conversion element 112. For clarity and simplicity, the pixel circuit 10 and the light-emitting element 20 are shown in FIG. 5 is not shown.
需要注意的是，可以通过软件方式或其他本领域中的常规方法实时控制光电转换元件112和储能装置113的工作状态，在此不再赘述。It should be noted that the working states of the photoelectric conversion element 112 and the energy storage device 113 can be controlled in real time by software or other conventional methods in the art, and details will not be repeated here.
需要注意的是，多个光电转换元件112可以彼此串联连接后与储能装置113连接以将其转化的电能储存在储能装置113中，或者多个光电转换元件112可以彼此混连(既包括串联也包括并联)，具体的连接方式视具体情况而定，本公开的实施例对此不作限制。It should be noted that a plurality of photoelectric conversion elements 112 can be connected in series with each other and then connected with the energy storage device 113 to store the converted electric energy in the energy storage device 113, or a plurality of photoelectric conversion elements 112 can be mixed with each other (including The series connection also includes the parallel connection), and the specific connection mode depends on the specific situation, which is not limited in the embodiments of the present disclosure.
本公开实施例提供的显示面板还可以包括像素界定层。图6示出了本公开一实施例提供的一种显示面板的像素界定层的平面结构示意图。如图6所示，像素界定层114包括对应于发光元件20的开口以及对应于光电转换元件112的开口，从而使得显示面板通过开口可以显示发光元件20发出的光以及可以通过开口接收外部环境中的光能以供显示面板11中的光电转换元件112将该光能转换为电能。需要注意的是，对应于发光元件20的开口和光电转换元件112的开口可以是同一个开口也可以是不同的开口，其位置也可以视具体情况而定，本公开的实施例对此不作限制。The display panel provided by the embodiments of the present disclosure may further include a pixel defining layer. FIG. 6 shows a schematic plan view of a pixel defining layer of a display panel provided by an embodiment of the present disclosure. As shown in FIG. 6 , the pixel defining layer 114 includes an opening corresponding to the light-emitting element 20 and an opening corresponding to the photoelectric conversion element 112, so that the display panel can display the light emitted by the light-emitting element 20 through the opening and can receive light from the external environment through the opening. The light energy is used for the photoelectric conversion element 112 in the display panel 11 to convert the light energy into electrical energy. It should be noted that the opening corresponding to the light-emitting element 20 and the opening of the photoelectric conversion element 112 may be the same opening or different openings, and their positions may also depend on specific circumstances, which is not limited by the embodiments of the present disclosure. .
例如，如图6所示，像素界定层114设置在衬底基板上，该像素界定层114用于限定阵列基板的多个像素单元。如图6所示，该像素界定层114包括多个开口，开口内至少部分设置像素电路10、发光元件20或光电转换元件112等结构。例如，像素界定层114的材料可以包括有机绝缘材料或无机绝缘材料，有机绝缘材料例如包括聚酰亚胺、聚酰胺、丙烯酸树脂、酚醛树脂中的一种或多种，本公开实施例对像素界定层114的材料不作限定。For example, as shown in FIG. 6 , a pixel defining layer 114 is disposed on the base substrate, and the pixel defining layer 114 is used to define a plurality of pixel units of the array substrate. As shown in FIG. 6 , the pixel defining layer 114 includes a plurality of openings, and structures such as the pixel circuit 10 , the light emitting element 20 or the photoelectric conversion element 112 are at least partially disposed in the openings. For example, the material of the pixel defining layer 114 may include an organic insulating material or an inorganic insulating material. The organic insulating material includes, for example, one or more of polyimide, polyamide, acrylic resin, and phenolic resin. The material of the defining layer 114 is not limited.
图7为本公开一实施例提供的一种显示面板的信号时序图。下面结合图7所示的信号时序图，对图4所示的显示面板11的工作原理进行说明，并且这里以各个晶体管为P型晶体管为例进行说明，但是本公开的实施例不限于此。FIG. 7 is a signal timing diagram of a display panel provided by an embodiment of the present disclosure. The working principle of the display panel 11 shown in FIG. 4 will be described below with reference to the signal timing diagram shown in FIG. 7 , and the description will be made by taking each transistor as a P-type transistor as an example, but the embodiments of the present disclosure are not limited thereto.
如图7所示，每一帧图像的显示过程包括两个阶段，分别为第一阶段1和第二阶段2，图7中示出了每个阶段中各个信号的时序波形。As shown in FIG. 7 , the display process of each frame of image includes two stages, which are the first stage 1 and the second stage 2 respectively. FIG. 7 shows the timing waveforms of each signal in each stage.
需要说明的是，图8为图4中所示的显示面板11对应于图7中第一阶段1的电路示意图，图9为图4中所示的显示面板11对应于图7中第二阶段2的电路示意图。图9中用虚线标识的晶体管均表示在对应阶段内处于截止状态，图8和图9中带箭头的虚线表示显示面板11在对应阶段内的电流方向。图8和图9中所示的晶体管均以P型晶体管为例进行说明，即各个晶体管的栅极在接入低电平时导通，而在接入高电平时截止。以下实施例与此相同，不再赘述。It should be noted that FIG. 8 is a schematic circuit diagram of the display panel 11 shown in FIG. 4 corresponding to the first stage 1 in FIG. 7 , and FIG. 9 is a circuit diagram of the display panel 11 shown in FIG. 2. Circuit schematic. The transistors marked with dotted lines in FIG. 9 all indicate that they are in the off state in the corresponding phase, and the dotted lines with arrows in FIG. 8 and FIG. 9 indicate the current direction of the display panel 11 in the corresponding phase. The transistors shown in FIG. 8 and FIG. 9 are all described by taking P-type transistors as an example, that is, the gates of each transistor are turned on when connected to a low level, and turned off when connected to a high level. The following embodiments are the same as this and will not be repeated here.
在第一阶段1，输入扫描信号和数据信号，开启数据写入电路200和驱动电路100，数据写入电路200将数据信号Vdata写入存储电路300，驱动电路100根据数据信号Vdata将驱动电流施加至发光元件LED以使其发光。In the first stage 1, the scanning signal and the data signal are input, the data writing circuit 200 and the driving circuit 100 are turned on, the data writing circuit 200 writes the data signal Vdata into the storage circuit 300, and the driving circuit 100 applies a driving current according to the data signal Vdata to the light emitting element LED to make it glow.
如图7和图8所示，在第一阶段1，第二晶体管T2被扫描信号的低电平导通，第一晶体管T1被第一节点N1的低电平导通。As shown in FIG. 7 and FIG. 8 , in the first phase 1 , the second transistor T2 is turned on by the low level of the scanning signal, and the first transistor T1 is turned on by the low level of the first node N1 .
如图8所示，在第一阶段1，形成一条数据写入路径(如图8中带箭头的虚线1所示)，数据信号Vdata经过第二晶体管T2对存储电容C进行充电或放电，从而将数据信号Vdata写入存储电容C中，同时，第一节点N1的电平变为数据信号Vdata的电平。如图7所示，该数据信号Vdata的电平为低电平，且该数据信号Vdata的低电平可以在一定范围内进行上下波动，从而使得该数据信号Vdata包括不同取值的低电平，且该范围内的不同取值的低电平都能使得第一晶体管(驱动晶体管)导通，从而可以根据该数据信号Vdata的电平的变化控制第一晶体管T1(驱动晶体管)的导通程度，从而控制流经第一晶体管T1以驱动发光元件LED发光的电流的大小，以使得发光元件LED显示不同的灰阶。当第一节点N1与第二节点N2之间的电压差大于阈值电压Vth时，第一晶体管T1导通，从而使发光元件LED在驱动电流的作用下发光。需要说明的是，Vth表示第一晶体管T1的阈值电压，由于在本实施例中，第一晶体管T1是以P型晶体管为例进行说明的，所以此处阈值电压Vth可以是个负值。在其他实施例中，若第一晶体管T1是N型晶体管，则阈值电压Vth可以是个正值。As shown in FIG. 8 , in the first stage 1, a data writing path (as shown by the dotted line 1 with an arrow in FIG. 8 ) is formed, and the data signal Vdata charges or discharges the storage capacitor C through the second transistor T2, thereby The data signal Vdata is written into the storage capacitor C, and at the same time, the level of the first node N1 becomes the level of the data signal Vdata. As shown in FIG. 7, the level of the data signal Vdata is low level, and the low level of the data signal Vdata can fluctuate up and down within a certain range, so that the data signal Vdata includes low levels of different values , and the low level of different values in this range can make the first transistor (drive transistor) turn on, so that the turn on of the first transistor T1 (drive transistor) can be controlled according to the level change of the data signal Vdata In order to control the magnitude of the current flowing through the first transistor T1 to drive the light-emitting element LED to emit light, so that the light-emitting element LED displays different gray scales. When the voltage difference between the first node N1 and the second node N2 is greater than the threshold voltage Vth, the first transistor T1 is turned on, so that the light emitting element LED emits light under the action of the driving current. It should be noted that Vth represents the threshold voltage of the first transistor T1 , since in this embodiment, the first transistor T1 is described using a P-type transistor as an example, the threshold voltage Vth here may be a negative value. In other embodiments, if the first transistor T1 is an N-type transistor, the threshold voltage Vth may be a positive value.
如图8所示，在此阶段，同时形成一条驱动发光路径(如图8中带箭头的虚线2所示)，由于第一晶体管T1导通，可以向发光元件LED提供驱动电流，发光元件LED在驱动电流的作用下发光。As shown in Figure 8, at this stage, a driving light-emitting path (as shown by the dotted line 2 with arrows in Figure 8) is formed at the same time. Since the first transistor T1 is turned on, a driving current can be provided to the light-emitting element LED, and the light-emitting element LED It emits light under the action of driving current.
在第二阶段2，发光元件LED保持第一阶段1中的发光状态，直至进行下一帧图像显示时，根据重新写入的数据信号Vdata进行相应“灰度”的发光。In the second stage 2, the light-emitting element LED maintains the light-emitting state in the first stage 1 until the next frame of image display is performed, according to the rewritten data signal Vdata to perform corresponding "gray-scale" light emission.
如图7和图9所示，在第二阶段2，第二晶体管T2被扫描信号的高电平截止，第一晶体管T1被第一节点N1的低电平导通。As shown in FIG. 7 and FIG. 9 , in the second phase 2 , the second transistor T2 is turned off by the high level of the scan signal, and the first transistor T1 is turned on by the low level of the first node N1 .
如图9所示，在第二阶段2，形成一条驱动发光路径(如图9中带箭头的虚线所示)。在此阶段，第一节点N1保持第一阶段1中的的电平，即数据信号Vdata的电平，第一晶体管T1在第一节点N1的电平的控制下继续保持导通。由于第一晶体管T1导通，可以向发光元件LED提供驱动电流，发光元件LED在驱动电流的作用下发光。As shown in FIG. 9 , in the second stage 2 , a driving light-emitting path is formed (as shown by the dotted line with an arrow in FIG. 9 ). In this phase, the first node N1 maintains the level in the first phase 1, that is, the level of the data signal Vdata, and the first transistor T1 continues to be turned on under the control of the level of the first node N1. Since the first transistor T1 is turned on, a driving current can be provided to the light emitting element LED, and the light emitting element LED emits light under the action of the driving current.
需要说明的是，本公开的各实施例中采用的晶体管均可以为薄膜晶体管或场效应晶体管或其他特性相同的开关器件，本公开的各实施例中均以薄膜晶体管为例进行说明。这里采用的晶体管的源极、漏极在结构上可以是对称的，所以其源极、漏极在结构上可以是没有区别的。在本公开的各实施例中，为了区分晶体管除栅极之外的两极，直接描述了其中一极为第一极，另一极为第二极。It should be noted that the transistors used in each embodiment of the present disclosure may be thin film transistors or field effect transistors or other switching devices with the same characteristics, and each embodiment of the present disclosure takes thin film transistors as an example for illustration. The source and drain of the transistor used here may be symmetrical in structure, so there may be no difference in structure between the source and drain. In each embodiment of the present disclosure, in order to distinguish the two poles of the transistor except the gate, it is directly described that one pole is the first pole and the other pole is the second pole.
另外，需要说明的是，图4中所示的显示面板11中的晶体管均是以P型晶体管为例进行说明的，此时，第一极可以是源极，第二极可以是漏极。显示面板11中的晶体管也可以仅采用N型晶体管或混合采用P型晶体管和N型晶体管，只需同时将选定类型的晶体管的端口极性按照本公开的实施例中的相应晶体管的端口极性相应连接即可。In addition, it should be noted that all the transistors in the display panel 11 shown in FIG. 4 are described by taking P-type transistors as examples. At this time, the first pole may be the source, and the second pole may be the drain. The transistors in the display panel 11 can also use only N-type transistors or mixed use of P-type transistors and N-type transistors, as long as the terminal polarity of the selected type of transistors is the same as that of the corresponding transistors in the embodiment of the present disclosure. Connect accordingly.
例如，如图10所示，在另一个示例中，第一晶体管T1和第二晶体管T2均采用N型晶体管，其连接方式的区别在于：发光元件LED的第一端和光电转换元件112的第一端1121连接，发光元件LED的第二端和第一晶体管T1的第二极连接，光电转换元件112的第二端1122和第二节点N2连接。需要注意的是，此时提供给第一晶体管T1和第二晶体管T2的信号(例如数据信号和扫描信号)的电平需要相应的变更为高电平。例如，在该示例中，数据信号Vdata的电平为高电平，且该数据信号Vdata的高电平可以在一定范围内进行上下波动，从而使得该数据信号Vdata包括不同取值的高电平，且该范围内的不同取值的高电平都能使得第一晶体管(驱动晶体管)导通，从而可以根据数据信号Vdata的电平的变化控制第一晶体管T1(驱动晶体管)的导通程度，从而控制流经第一晶体管T1以驱动发光元件LED发光的电流的大小，以使得发光元件LED显示不同的灰阶。图10中所示的显示面板的工作原理与图4中所示的显示面板的工作原理类似，在此不再赘述。For example, as shown in FIG. 10 , in another example, both the first transistor T1 and the second transistor T2 are N-type transistors, and the difference in their connection methods is: the first end of the light-emitting element LED and the first end of the photoelectric conversion element 112 One end 1121 is connected, the second end of the light emitting element LED is connected to the second pole of the first transistor T1, and the second end 1122 of the photoelectric conversion element 112 is connected to the second node N2. It should be noted that at this time, the levels of the signals (such as data signals and scan signals) provided to the first transistor T1 and the second transistor T2 need to be changed to high levels accordingly. For example, in this example, the level of the data signal Vdata is high level, and the high level of the data signal Vdata can fluctuate up and down within a certain range, so that the data signal Vdata includes high levels of different values , and the high level of different values in this range can make the first transistor (drive transistor) conduct, so that the conduction degree of the first transistor T1 (drive transistor) can be controlled according to the level change of the data signal Vdata , so as to control the magnitude of the current flowing through the first transistor T1 to drive the light-emitting element LED to emit light, so that the light-emitting element LED displays different gray scales. The working principle of the display panel shown in FIG. 10 is similar to that of the display panel shown in FIG. 4 , and will not be repeated here.
需要说明的是，当采用N型晶体管时，可以采用氧化铟镓锌(Indium Gallium ZincOxide，IGZO)作为薄膜晶体管的有源层，相对于采用低温多晶硅(Low Temperature PolySilicon，LTPS)或非晶硅(例如氢化非晶硅)作为薄膜晶体管的有源层，可以有效减小晶体管的尺寸以及防止漏电流。It should be noted that when an N-type transistor is used, Indium Gallium Zinc Oxide (IGZO) can be used as the active layer of the thin film transistor, compared to using low temperature polysilicon (Low Temperature PolySilicon, LTPS) or amorphous silicon ( For example, hydrogenated amorphous silicon) is used as the active layer of the thin film transistor, which can effectively reduce the size of the transistor and prevent leakage current.
本公开实施例还提供一种显示装置1，如图11所示，该显示装置1包括本公开任一实施例提供的显示面板11、多条扫描控制线GL和多条数据信号线DL。例如，该显示面板11包括根据多条扫描控制线GL和多条数据信号线DL交叉限定的呈阵列分布的多个像素单元111。例如，在像素单元111中的像素电路10包括数据写入电路200的情况下，多条扫描线对应连接到每行像素单元111的像素电路10的数据写入电路200的扫描信号端Gate以提供扫描信号；多条数据线对应连接到每列像素单元111的像素电路10的数据写入电路200的数据信号端Vdata以提供数据信号。例如，每个像素单元111连接到一条扫描线GL(提供扫描信号)和一条数据线DL(提供数据信号)。The embodiment of the present disclosure also provides a display device 1 , as shown in FIG. 11 , the display device 1 includes the display panel 11 provided in any embodiment of the present disclosure, a plurality of scanning control lines GL and a plurality of data signal lines DL. For example, the display panel 11 includes a plurality of pixel units 111 distributed in an array defined by intersections of a plurality of scanning control lines GL and a plurality of data signal lines DL. For example, in the case where the pixel circuit 10 in the pixel unit 111 includes a data writing circuit 200, a plurality of scanning lines are correspondingly connected to the scanning signal terminal Gate of the data writing circuit 200 of the pixel circuit 10 of each row of pixel units 111 to provide Scanning signal; a plurality of data lines are correspondingly connected to the data signal terminal Vdata of the data writing circuit 200 of the pixel circuit 10 of each column of pixel units 111 to provide data signals. For example, each pixel unit 111 is connected to one scan line GL (supply a scan signal) and one data line DL (supply a data signal).
需要说明的是，在图11中仅示出了部分的像素单元111、扫描控制线GL和数据信号线DL。例如，每个像素单元111可以包括上述实施例中提供的任一像素电路10，例如包括图4中所示的像素电路10。需要注意的是，不限于此，该像素电路10还可以是具有阈值电压补偿功能的各种像素电路例如可以是4T1C、4T2C或8T1C等其他像素电路，本公开的实施例对此不作限制。It should be noted that only part of the pixel unit 111 , the scanning control line GL and the data signal line DL are shown in FIG. 11 . For example, each pixel unit 111 may include any pixel circuit 10 provided in the above-mentioned embodiments, for example, include the pixel circuit 10 shown in FIG. 4 . It should be noted that, it is not limited thereto, and the pixel circuit 10 can also be various pixel circuits with a threshold voltage compensation function, for example, other pixel circuits such as 4T1C, 4T2C or 8T1C, which are not limited in the embodiments of the present disclosure.
如图11所示，该显示装置1还可以包括栅极驱动器12、数据驱动器14和定时控制器13。该栅极驱动器12用于驱动多条扫描信号线GL；该数据驱动器14用于驱动多条数据信号线DL；该定时控制器13用于处理从显示装置1外部输入的图像数据RGB、向数据驱动器14提供处理的图像数据RGB以及向栅极驱动器12和数据驱动器14输出扫描控制信号GCS和数据控制信号DCS，以对栅极驱动器12和数据驱动器14进行控制。As shown in FIG. 11 , the display device 1 may further include a gate driver 12 , a data driver 14 and a timing controller 13 . The gate driver 12 is used to drive a plurality of scanning signal lines GL; the data driver 14 is used to drive a plurality of data signal lines DL; The driver 14 provides processed image data RGB and outputs a scan control signal GCS and a data control signal DCS to the gate driver 12 and the data driver 14 to control the gate driver 12 and the data driver 14 .
例如，栅极驱动器12根据源自定时控制器13的多个扫描控制信号GCS向多个扫描控制线GL提供多个选通信号。多个选通信号视具体情况而定，例如，在本公开实施例中可以包括扫描信号。这些信号通过多个扫描控制线GL提供给每个像素单元111。For example, the gate driver 12 supplies a plurality of gate signals to a plurality of scan control lines GL according to a plurality of scan control signals GCS from the timing controller 13 . The plurality of strobe signals depends on specific situations, for example, in the embodiments of the present disclosure, a scan signal may be included. These signals are supplied to each pixel unit 111 through a plurality of scanning control lines GL.
例如，数据驱动器14使用参考伽玛电压根据源自定时控制器13的多个数据控制信号DCS将从定时控制器13输入的数字图像数据RGB转换成数据信号Vdata。数据驱动器14向多条数据信号线DL提供转换的数据信号Vdata。For example, the data driver 14 converts the digital image data RGB input from the timing controller 13 into a data signal Vdata according to a plurality of data control signals DCS from the timing controller 13 using a reference gamma voltage. The data driver 14 supplies the converted data signal Vdata to a plurality of data signal lines DL.
例如，定时控制器13对外部输入的图像数据RGB进行处理以匹配显示面板11的大小和分辨率，然后向数据驱动器14提供处理的图像数据。定时控制器13使用从显示装置外部输入的同步信号(例如点时钟DCLK、数据使能信号DE、水平同步信号Hsync以及垂直同步信号Vsync)产生多条扫描控制信号GCS和多条数据控制信号DCS。定时控制器13分别向栅极驱动器12和数据驱动器14提供产生的扫描控制信号GCS和数据控制信号DCS，以用于栅极驱动器12和数据驱动器14的控制。For example, the timing controller 13 processes externally input image data RGB to match the size and resolution of the display panel 11 , and then supplies the processed image data to the data driver 14 . The timing controller 13 generates a plurality of scanning control signals GCS and a plurality of data control signals DCS using synchronous signals (such as dot clock DCLK, data enable signal DE, horizontal synchronous signal Hsync, and vertical synchronous signal Vsync) input from the display device. The timing controller 13 provides the generated scan control signal GCS and data control signal DCS to the gate driver 12 and the data driver 14 respectively for controlling the gate driver 12 and the data driver 14 .
例如，栅极驱动器12和数据驱动器14可以实现为半导体芯片。该显示装置1还可以包括其他部件，例如信号解码电路、电压转换电路等，这些部件例如可以采用已有的常规部件，这里不再详述。For example, the gate driver 12 and the data driver 14 may be implemented as semiconductor chips. The display device 1 may also include other components, such as a signal decoding circuit, a voltage conversion circuit, etc. These components may be existing conventional components, and will not be described in detail here.
例如，本实施例提供的显示装置1可以是电子纸、手机、平板电脑、电视机、显示器、笔记本电脑、数码相框、导航仪等任何具有显示功能的产品或部件。For example, the display device 1 provided in this embodiment may be any product or component with a display function, such as electronic paper, mobile phone, tablet computer, television, monitor, notebook computer, digital photo frame, and navigator.
关于显示装置1的技术效果可以参考本公开的实施例中提供的显示面板11的技术效果，这里不再赘述。Regarding the technical effects of the display device 1 , reference may be made to the technical effects of the display panel 11 provided in the embodiments of the present disclosure, which will not be repeated here.
本公开的实施例还提供一种驱动方法，可以用于驱动本公开的实施例提供的显示面板11。例如，该驱动方法包括：The embodiment of the present disclosure also provides a driving method, which can be used to drive the display panel 11 provided by the embodiment of the present disclosure. For example, this driving method includes:
光电转换元件112将光能转换为电能以向与其相连的至少一个像素单元111中的像素电路10和发光元件20供电；The photoelectric conversion element 112 converts light energy into electrical energy to supply power to the pixel circuit 10 and the light emitting element 20 in at least one pixel unit 111 connected thereto;
像素单元111中的像素电路10将驱动电流施加至发光元件20以使其发光。The pixel circuit 10 in the pixel unit 111 applies a driving current to the light emitting element 20 to cause it to emit light.
例如，在图3所示的示例中，在像素电路10包括驱动电路100、数据写入电路200和存储电路300的情况下，该驱动方法包括如下操作：For example, in the example shown in FIG. 3, in the case that the pixel circuit 10 includes a driving circuit 100, a data writing circuit 200 and a storage circuit 300, the driving method includes the following operations:
输入扫描信号和数据信号，开启数据写入电路200和驱动电路100，数据写入电路200将数据信号写入存储电路300，驱动电路100根据数据信号将驱动电流施加至发光元件20以使其发光。Input the scan signal and the data signal, turn on the data writing circuit 200 and the driving circuit 100, the data writing circuit 200 writes the data signal into the storage circuit 300, and the driving circuit 100 applies a driving current to the light emitting element 20 according to the data signal to make it emit light .
需要说明的是，关于该驱动方法的详细描述可以参考本公开的实施例中对于显示面板11的工作原理的描述，这里不再赘述。It should be noted that, for a detailed description of the driving method, reference may be made to the description of the working principle of the display panel 11 in the embodiments of the present disclosure, which will not be repeated here.
本实施例提供的驱动方法，一方面，可以减少传输电压的走线的电阻，从而避免了电能损耗和走线电阻引起的对高电压的电压压降和对低电压电压压升的问题，提高了显示面板的显示质量，另一方面，可以将光能转换为电能以实现可再生能源的有效利用，从而节约了电能，减少了对环境的污染。The driving method provided by this embodiment, on the one hand, can reduce the resistance of the wires that transmit the voltage, thereby avoiding the problems of voltage drop for high voltages and voltage rises for low voltages caused by power loss and wire resistance, and improve The display quality of the display panel is improved, and on the other hand, light energy can be converted into electric energy to realize the effective use of renewable energy, thereby saving electric energy and reducing environmental pollution.
以上所述，仅为本公开的具体实施方式，但本公开的保护范围并不局限于此，本公开的保护范围应以所述权利要求的保护范围为准。The above description is only a specific implementation manner of the present disclosure, but the protection scope of the present disclosure is not limited thereto, and the protection scope of the present disclosure should be based on the protection scope of the claims.
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