技术领域technical field
本发明涉及显示技术领域，特别是指一种显示屏及其像素电路单元的电源管理方法和装置。The invention relates to the field of display technology, in particular to a power management method and device for a display screen and a pixel circuit unit thereof.
背景技术Background technique
AMOLED(Active-matrix organic light-emitting diode，有源矩阵有机发光二极管)作为自发光器件，同时具备响应速度快，色彩逼真及可弯折等优点，目前正广泛应用于手机、平板、电视等显示领域。AMOLED (Active-matrix organic light-emitting diode, active matrix organic light-emitting diode), as a self-luminous device, has the advantages of fast response, vivid color and bendability, and is currently widely used in mobile phones, tablets, TVs and other displays field.
目前基于AMOLED的显示屏的像素电路单元中，决定OLED器件亮度的电流公式为ID＝K(VELVDD-Vdata)2；其中K为DTFT(Driver Thin Film Transistor，驱动薄膜晶体管)工艺参数，VELVDD为电源管理单元输出给像素电路单元中的DTFT源极的电压，取固定值；Vdata为器件亮度控制电压，决定某一灰阶下的具体亮度值。由于各像素之间TFT的Vth偏差所导致像素间亮度存在差异，所以，目前像素电路单元采用补偿电路结构，消除了多个TFT的Vth差异对像素亮度的影响。Currently, in the pixel circuit unit of an AMOLED-based display screen, the current formula for determining the brightness of an OLED device is ID =K(VELVDD -Vdata )2 ; where K is a DTFT (Driver Thin Film Transistor, driving thin film transistor) process parameter, VELVDD is the voltage output by the power management unit to the DTFT source in the pixel circuit unit, which takes a fixed value; Vdata is the device brightness control voltage, which determines the specific brightness value under a certain gray scale. Due to the difference in luminance between pixels caused by the Vth deviation of TFTs among the pixels, the current pixel circuit unit adopts a compensation circuit structure to eliminate the influence of the Vth difference of multiple TFTs on the pixel luminance.
然而，现有电路具有功耗较高的缺点，需进一步降低OLED器件的功耗。However, the existing circuit has the disadvantage of high power consumption, and it is necessary to further reduce the power consumption of the OLED device.
发明内容Contents of the invention
有鉴于此，本发明的目的在于提出一种显示屏及其像素电路单元的电源管理方法和装置，用以降低OLED器件的功耗，从而降低基于OLED器件的显示屏整体功耗。In view of this, the object of the present invention is to provide a power management method and device for a display screen and its pixel circuit unit, so as to reduce the power consumption of OLED devices, thereby reducing the overall power consumption of the display screen based on OLED devices.
基于上述目的本发明提供一种像素电路单元的电源管理方法，包括：Based on the above purpose, the present invention provides a power management method for a pixel circuit unit, including:
调整有机发光二极管OLED器件阴极电压VELVSS，并实时检测所述像素电路单元的有机发光二极管OLED器件电流ID；Adjusting the cathode voltage VELVSS of the organic light emitting diode OLED device, and detecting the current ID of the organic light emitting diodeOLED device of the pixel circuit unit in real time;
根据ID处于稳定区间内的VELVSS的最大值，为所述机发光二极管OLED器件阴极供电。According to the maximum value of VELVSS whereID is in a stable range, power is supplied to the cathode of the organic light emitting diode (OLED) device.
其中，所述调整有机发光二极管OLED器件阴极电压VELVSS，具体包括：Wherein, the adjustment of the cathode voltage VELVSS of the OLED device specifically includes:
以一设定电压值为VELVSS的初始值，在一次调整时以设定步长增加VELVSS的值。Use a set voltage as the initial value of VELVSS , and increase the value of VELVSS with a set step during an adjustment.
其中，所述ID处于稳定区间内的VELVSS的最大值是根据如下方法确定的：Wherein, the maximum value of VELVSS where theID is in a stable interval is determined according to the following method:
将当前检测的ID与目标电流ID′的值进行比较；Comparing the currently detectedID with the value of the target currentID ';
若两者差值超出阈值，则判断ID已不处于稳定区间内，将上次调整时的VELVSS的值作为所述ID处于稳定区间内的VELVSS的最大值；If the difference between the two exceeds the threshold, it is judged that ID is not in the stable interval, and the value of VELVSS during the last adjustment is used as the maximum value of VELVSSin the stable interval for theID ;
其中，目标电流值是根据所述像素电路单元的DTFT源极的电压VELVDD和器件亮度控制电压Vdata计算的。Wherein, the target current value is calculated according to the voltage VELVDD of the DTFT source of the pixel circuit unit and the device brightness control voltage Vdata .
本发明还提供一种像素电路单元的电源管理装置，包括：The present invention also provides a power management device for a pixel circuit unit, including:
电流检测单元，实时检测像素电路单元的OLED器件电流ID；The current detection unit detects theOLED device current ID of the pixel circuit unit in real time;
电流稳定区间判断单元，用于判断检测的ID是否处于稳定区间内，并输出判断结果；A current stable interval judging unit, used to judge whether the detected ID is in the stable interval, and output the judgment result;
电源输出控制单元，用于调整所述像素电路单元的OLED器件阴极电压VELVSS，以及根据所述判断结果，确定出ID处于稳定区间内的VELVSS的最大值后，根据确定的最大值为所述像素电路单元的OLED器件阴极供电。The power output control unit is used to adjust the cathode voltage VELVSS of the OLED device of the pixel circuit unit, and according to the judgment result, after determining the maximum value of VELVSS whoseID is in the stable range, according to the determined maximum value is The cathode of the OLED device of the pixel circuit unit supplies power.
其中，所述电源输出控制单元具体包括：Wherein, the power output control unit specifically includes:
调整子单元，用于调整所述有机发光二极管OLED器件阴极电压VELVSS的值；An adjustment subunit, configured to adjust the value of the cathode voltage VELVSS of the OLED device;
电源供给子单元，用于根据调整子单元调整的VELVSS的值为所述像素电路单元的OLED器件阴极供电；以及在根据所述判断结果，确定出ID处于稳定区间内的VELVSS的最大值后，根据确定的最大值为所述像素电路单元中OLED器件阴极供电。The power supply subunit is used to supply power to the cathode of the OLED device of the pixel circuit unit according to the value of VELVSSadjusted by the adjustmentsubunit ; After the value is determined, power is supplied to the cathode of the OLED device in the pixel circuit unit according to the determined maximum value.
其中，所述电流稳定区间判断单元具体包括：Wherein, the current stability interval judgment unit specifically includes:
电流预置子单元，用于预置目标电流ID′；其中，目标电流ID′的值是根据所述像素电路单元的DTFT源极电压VELVDD和器件亮度控制电压Vdata计算的；The current preset subunit is used to preset the target current ID'; wherein, the value of the target current ID' iscalculated according to the DTFT source voltage V ELVDDofthe pixel circuit unit and the device brightness control voltage Vdata ;
判断子单元，用于将实时检测的ID与目标电流值ID′进行比较；若两者差值超出阈值，则输出ID不处于稳定区间的判断结果。The judging subunit is used to compare the real-time detectedID with the target current valueID '; if the difference between the two exceeds a threshold, output ajudging result that ID is not in a stable interval.
较佳地，所述判断子单元具体为比较器；以及Preferably, the judging subunit is specifically a comparator; and
所述比较器的两个输入分别接入所述电流检测单元输出的OLED器件电流ID和电流预置子单元预置的ID′；所述比较器的输出反馈到所述电源输出控制单元。The two inputs of the comparator are respectively connected to theOLED device current ID output by the current detection unit and theID 'preset by the current preset subunit; the output of the comparator is fed back to the power output control unit .
本发明还提供一种显示屏，包括：像素电路单元，以及还包括：上述的所述像素电路单元的电源管理装置。The present invention also provides a display screen, comprising: a pixel circuit unit, and further comprising: the above-mentioned power management device for the pixel circuit unit.
本发明的主要技术方案中，调整像素电路单元的有机发光二极管OLED器件阴极电压VELVSS，并实时检测像素电路单元的OLED器件电流ID；根据ID处于稳定区间内的VELVSS的最大值，为所述像素电路单元的OLED器件阴极供电。这样，处于稳定区间内的ID可以保证像素电路单元的OLED器件的亮度，同时，ID处于稳定区间内的最大的VELVSS可以有效降低OLED器件功耗，从而降低基于OLED器件的显示屏整体功耗。In the main technical solution of the present invention, the cathode voltage VELVSS of the organic light emitting diode OLED device of the pixel circuit unit is adjusted, and the current ID of the OLED device of the pixel circuit unit is detected in real time; according to the maximum value of VELVSSwhere IDis in a stable interval, Supplying power to the cathode of the OLED device of the pixel circuit unit. In this way, the ID in the stable range can ensure the brightness of theOLED device of the pixel circuit unit, and at the same time, the maximum VELVSS in which theID is in the stable range can effectively reduce the power consumption of the OLED device, thereby reducing the overall brightness of the display screen based on the OLED device. power consumption.
附图说明Description of drawings
图1为现有技术的像素电路单元中DTFT的漏极电流ID与漏源电压VDS的变化曲线图；Fig. 1 is the change curve diagram of the drain current ID and the drain-source voltage VDS of DTFT in the pixel circuit unit of prior art;
图2a为现有技术的像素电路单元中DTFT驱动OLED器件的电路示意图；2a is a schematic circuit diagram of a DTFT-driven OLED device in a pixel circuit unit in the prior art;
图2b为本发明实施例提供的一种像素电路单元的电源管理方法流程图；Fig. 2b is a flowchart of a power management method for a pixel circuit unit provided by an embodiment of the present invention;
图3为本发明实施例提供的一种像素电路单元的电源管理装置内部结构框图。FIG. 3 is a block diagram of the internal structure of a power management device for a pixel circuit unit provided by an embodiment of the present invention.
具体实施方式Detailed ways
为使本发明的目的、技术方案和优点更加清楚明白，以下结合具体实施例，并参照附图，对本发明进一步详细说明。In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be described in further detail below in conjunction with specific embodiments and with reference to the accompanying drawings.
下面详细描述本发明的实施例，所述实施例的示例在附图中示出，其中自始至终相同或类似的标号表示相同或类似的元件或具有相同或类似功能的元件。下面通过参考附图描述的实施例是示例性的，仅用于解释本发明，而不能解释为对本发明的限制。Embodiments of the present invention are described in detail below, examples of which are shown in the drawings, wherein the same or similar reference numerals designate the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the figures are exemplary only for explaining the present invention and should not be construed as limiting the present invention.
本技术领域技术人员可以理解，除非特意声明，这里使用的单数形式“一”、“一个”、“所述”和“该”也可包括复数形式。应该进一步理解的是，当我们称元件被“连接”或“耦接”到另一元件时，它可以直接连接或耦接到其他元件，或者也可以存在中间元件。此外，这里使用的“连接”或“耦接”可以包括无线连接或无线耦接。这里使用的措辞“和/或”包括一个或更多个相关联的列出项的全部或任一单元和全部组合。Those skilled in the art will understand that unless otherwise stated, the singular forms "a", "an", "said" and "the" used herein may also include plural forms. It should be further understood that when an element is referred to as being "connected" or "coupled" to another element, it can be directly connected or coupled to the other element or intervening elements may also be present. Additionally, "connected" or "coupled" as used herein may include wireless connection or wireless coupling. The expression "and/or" used herein includes all or any elements and all combinations of one or more associated listed items.
需要说明的是，本发明实施例中所有使用“第一”和“第二”的表述均是为了区分两个相同名称非相同的实体或者非相同的参量，可见“第一”“第二”仅为了表述的方便，不应理解为对本发明实施例的限定，后续实施例对此不再一一说明。It should be noted that all expressions using "first" and "second" in the embodiments of the present invention are to distinguish two entities with the same name but different parameters or parameters that are not the same, see "first" and "second" It is only for the convenience of expression, and should not be construed as a limitation on the embodiments of the present invention, which will not be described one by one in the subsequent embodiments.
本发明的发明人对现有像素电路单元进行分析发现，像素电路单元中DTFT的漏极电流ID与漏源电压VDS的变化曲线图如图1所示。通常决定OLED器件电流的DTFT(驱动晶体管)工作在饱和区状态，也就是图1中的恒流区，此时ID接近某一稳定值，当在一种固定亮度下，即某一Vdata值下，且DTFT的栅源电压VGS为某一固定值时，处于饱和区的DTFT若不考虑沟道宽度调制效应，OLED器件的电流ID值与决定器件电流的DTFT源漏电压VDS无关。如图2a所示的电路中，OLED器件消耗的功率计算为Poled＝(VELVDD-VELVSS)×ID。其中，VELVSS为电源管理单元输出给像素电路单元的有机发光二极管OLED器件阴极电压，VELVDD为电源管理单元输出给DTFT的源极电压。由此，本发明的发明人考虑到，采取增大VELVSS电压值的方法可以有效降低OLED器件功耗。The inventors of the present invention analyzed the existing pixel circuit unit and found that the change curve of the drain current ID and the drain-source voltage VDS of theDTFT in the pixel circuit unit is shown in FIG. 1 . Usually, theDTFT (driving transistor) that determines the current of the OLED device works in the saturation region, which is the constant current region in Figure 1. At this time, ID is close to a certain stable value. When it is under a fixed brightness, that is, a certain Vdata value, and the DTFT gate-source voltage VGS is a fixed value, if the DTFT in the saturation region does not consider the channel width modulation effect, the current ID value of the OLED device is related to theDTFT source-drain voltage VDS that determines the device current irrelevant. In the circuit shown in FIG. 2 a , the power consumed by the OLED device is calculated as Poled =(VELVDD−VELVSS )×ID . Wherein, VELVSS is the cathode voltage of the OLED device output by the power management unit to the pixel circuit unit, and VELVDD is the source voltage output by the power management unit to the DTFT. Therefore, the inventors of the present invention consider that the method of increasing the voltage value of VELVSS can effectively reduce the power consumption of the OLED device.
基于上述分析，本发明的主要思路为，调整像素电路单元的有机发光二极管OLED器件阴极电压VELVSS，并实时检测像素电路单元的OLED器件电流ID；根据ID处于稳定区间内的VELVSS的最大值，为所述像素电路单元的OLED器件阴极供电。这样，处于稳定区间内的ID可以保证OLED器件的亮度，同时，最大的VELVSS可以有效降低OLED器件功耗，从而降低基于OLED器件的显示屏整体功耗。Based on the above analysis, the main idea of the present invention is toadjust the cathode voltage VELVSS of the organic light-emitting diodeOLED device of the pixel circuit unit, and detect the current ID of the OLED device of the pixel circuit unit in real time; The maximum value is to supply power to the cathode of the OLED device of the pixel circuit unit. In this way, the ID in the stable range can ensure the brightness of the OLED device, and at the same time, the maximum VELVSS can effectively reduce the powerconsumption of the OLED device, thereby reducing the overall power consumption of the display screen based on the OLED device.
下面结合附图详细说明本发明实施例的技术方案。The technical solutions of the embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings.
基于上述的分析和思路本发明实施例提供的一种显示屏中像素电路单元的电源管理方法，流程如图2b所示，包括如下步骤：Based on the above analysis and ideas, the embodiment of the present invention provides a power management method for a pixel circuit unit in a display screen, the process flow is shown in Figure 2b, including the following steps:
步骤S201：调整一次像素电路单元的有机发光二极管OLED器件阴极电压VELVSS。Step S201: adjusting the cathode voltage VELVSS of the organic light emitting diode (OLED) device of the primary pixel circuit unit.
具体地，可以为显示屏中所有的像素电路单元提供OLED器件阴极电压VELVSS，并以一设定电压值为VELVSS的初始值，在VELVSS的一次调整过程中以设定步长增加VELVSS的值；也就是说，在一设定电压值的基础上，每次执行本步骤时，就会在上个VELVSS的值的基础上增加设定步长，得到本次调整后的VELVSS的值。而上述的设定电压值可以是一个较小的电压值，由本领域技术人员根据经验设置。Specifically, the OLED device cathode voltage VELVSS can be provided to all pixel circuit units in the display screen, and a set voltage value is the initial value of VELVSS , and V ELVSS can be increased with a set step size during an adjustment process of VELVSS . The value ofELVSS ; that is to say, on the basis of a set voltage value, each time this step is executed, the set step size will be increased on the basis of the value of the previous VELVSS to obtain the adjusted V The value ofELVSS . The above-mentioned set voltage value may be a relatively small voltage value, which is set by those skilled in the art based on experience.
步骤S202：检测像素电路单元的OLED器件电流ID。StepS202 : Detect the OLED device current ID of the pixel circuit unit.
具体地，可以检测显示屏中任一像素电路单元的OLED器件电流ID。Specifically, the OLED device current ID of any pixel circuit unit in the display screen can bedetected .
步骤S203：判断当前检测的ID是否处于稳定区间；若是，则跳转到步骤S201继续调整VELVSS的值；否则，判断ID已不处于稳定区间，执行如下步骤S204。StepS203 : Determine whether the currently detected ID is in a stable range; if so, jump to step S201 to continue adjusting the value of VELVSS ; otherwise, determine that theID is not in a stable range, and execute the following step S204.
具体地，可以将当前检测的ID的值与目标电流ID′的值进行比较；Specifically, the value of the currently detected ID can becompared with the value of the target currentID ';
若两者差值超出阈值，则判断ID已不处于稳定区间，则执行如下步骤S204将上次调整时的VELVSS的值作为ID处于稳定区间内的VELVSS的最大值；If the difference between the two exceeds the threshold, it is judged thatID is not in the stable interval, and then the following step S204 is performed to use the value of VELVSS during the last adjustment as the maximum value of VELVSS in whichID is in the stable interval;
否则，判断ID仍处于稳定区间，VELVSS还具有提高的空间，则跳转到上述步骤S201，继续进一步增加VELVSS的调整尝试。Otherwise, it is judged that ID is still in a stable range and VELVSS still has room forimprovement, then jump to the above step S201 and continue to further increase V ELVSSadjustment attempts.
上述的目标电流ID′的值可以是根据像素电路单元的DTFT源极电压VELVDD和器件亮度控制电压Vdata预先计算得到的：ID′＝K(VELVDD-Vdata)2；其中，K为像素电路单元的TFT工艺参数。The value of the above-mentioned target current ID' can be pre-calculated according to theDTFT source voltage VELVDD of the pixel circuit unit and the device brightness control voltage Vdata : ID'=K (VELVDD -Vdata )2 ; where, K is a TFT process parameter of the pixel circuit unit.
上述的阈值可根据经验设置，比如，根据如图1的变化曲线就可以判断出ID的稳定区间的范围，从而依据此设置一个合理的阈值。The above-mentioned threshold can be set according to experience, for example, the range of the stable interval of ID can bejudged according to the change curve shown in FIG. 1 , and a reasonable threshold can be set based on this.
步骤S204：根据ID处于稳定区间内的VELVSS的最大值，为像素电路单元的OLED器件阴极供电。Step S204: According to the maximum value of VELVSS whereID is in a stable range, supply power to the cathode of the OLED device of the pixel circuit unit.
具体地，对于VELVSS的值的调整是逐步增大的情况，则将ID处于稳定区间内的最后一次调整的VELVSS的值，即上次调整时的VELVSS的值，作为ID处于稳定区间内的VELVSS的最大值；之后，根据ID处于稳定区间内的VELVSS的最大值，为显示屏中所有的像素电路单元的OLED器件阴极供电。这样，即使增加了像素电路单元的OLED器件阴极，由于保证了ID处于稳定区间内，因此能保证OLED器件的亮度，同时，较高的OLED器件阴极电压VELVSS又能有效降低OLED器件功耗。Specifically, for the case where the value of VELVSS is gradually increased, the last adjusted value of VELVSS when ID is in the stable range, that is, the value of VELVSSat the time of last adjustment, isregarded as The maximum value of VELVSS in the stable interval; then, according to the maximum value of VELVSS in whichID is in the stable interval, power is supplied to the cathodes of OLED devices of all pixel circuit units in the display screen. In this way, even if the cathode of the OLED device of the pixel circuit unit is added, the brightness of the OLED device can be guaranteed by ensuring that the ID is in a stable range, and at the same time, the higher cathode voltage VELVSS of the OLEDdevice can effectively reduce the power consumption of the OLED device .
基于上述的方法，本发明实施例提供的一种设置于显示屏中，为显示屏的像素电路单元提供电源的电源管理装置，内部结构如图3所示，包括：电流检测单元301、电流稳定区间判断单元302、电源输出控制单元303、电流预置单元304。Based on the above method, an embodiment of the present invention provides a power management device provided in a display screen to provide power for the pixel circuit units of the display screen. The internal structure is shown in FIG. 3, including: a current detection unit 301, a current stabilization Interval judgment unit 302 , power output control unit 303 , and current preset unit 304 .
其中，电流检测单元301实时检测像素电路单元的OLED器件电流ID；具体地，电流检测单元301可以实时检测显示屏中某个像素电路单元的OLED器件电流ID。Wherein, the current detection unit 301 detects theOLED device current ID of the pixel circuit unit in real time; specifically, the current detection unit 301 can detect theOLED device current ID of a certain pixel circuit unit in the display screen in real time.
电流稳定区间判断单元302用于判断检测的ID是否处于稳定区间内，并输出判断结果。具体地，可以将电流检测单元301实时检测的ID与预置的目标电流ID′进行比较；若两者差值超出阈值，则输出ID不处于稳定区间的判断结果。由此，电流稳定区间判断单元302可以包括：电流预置子单元321、判断子单元322。The current stable interval judging unit 302 is used tojudge whether the detected ID is in the stable interval, and output the judgment result. Specifically, the ID detected in real time by the current detection unit301 can be compared with the preset target currentID '; if the difference between the two exceeds a threshold, a judgment result thatID is not in a stable range is output. Therefore, the current stable interval judging unit 302 may include: a current preset subunit 321 and a judging subunit 322 .
其中，电流预置子单元321用于预置目标电流ID′；其中，目标电流的值是根据所述像素电路单元的DTFT源极电压VELVDD和器件亮度控制电压Vdata预先计算的：ID′＝K(VELVDD-Vdata)2；其中，K为像素电路单元的TFT工艺参数。Wherein, the current preset subunit 321 is used to preset the target current ID '; wherein, the value of the target current is pre-calculated according to the DTFT source voltage VELVDD of the pixel circuit unit and the device brightness control voltage Vdata : ID ′=K(VELVDD −Vdata )2 ; wherein, K is a TFT process parameter of the pixel circuit unit.
判断子单元322用于将电流检测单元301检测的ID与电流预置子单元321预置的目标电流ID′进行比较；若两者差值超出阈值，则输出ID不处于稳定区间的判断结果。The judging subunit 322 is used to compare the ID detected by the current detection unit301 with the target current ID ' preset by the current preset subunit321 ; if the difference between the two exceeds the threshold, the outputID is not in the stable interval critical result.
事实上，判断子单元322的功能可以通过单片机或处理器来实现，也可通过更为简单的器件——比较器来实现。即上述的判断子单元322具体可以是比较器；其中，比较器的两个输入分别接入所述电流检测单元301输出的OLED器件电流ID和电流预置子单元321预置的ID′；比较器可以输出实时检测的ID与目标电流值ID′的比较结果；比较器的输出可以反馈到电源输出控制单元303。In fact, the function of the judging subunit 322 can be realized by a single chip microcomputer or a processor, or can be realized by a simpler device—a comparator. That is, the above-mentioned judging subunit 322 may specifically be a comparator; wherein, the two inputs of the comparator are respectively connected to the OLED device current ID output by the current detection unit301 and the ID' preset by the current preset subunit321 The comparator can output the comparison result between the real-time detectedID and the target current valueID '; the output of the comparator can be fed back to the power output control unit 303.
电源输出控制单元303用于调整像素电路单元的OLED器件阴极电压VELVSS，以及根据电流稳定区间判断单元302输出的判断结果，确定出ID处于稳定区间内的VELVSS的最大值后，根据确定的最大值为像素电路单元的OLED器件阴极供电。The power supply output control unit 303 is used to adjust the cathode voltage VELVSS of the OLED device of the pixel circuit unit, and according to the judgment result output by the current stable interval judgment unit 302, after determining the maximum value of VELVSS whoseID is in the stable interval, according to the determined The maximum value of is to supply power to the cathode of the OLED device of the pixel circuit unit.
进一步，电源输出控制单元303还可输出像素电路单元的DTFT源极电压VELVDD，以及器件亮度控制电压Vdata。Further, the power output control unit 303 can also output the DTFT source voltage VELVDD of the pixel circuit unit and the device brightness control voltage Vdata .
具体地，上述电源输出控制单元303可以包括：调整子单元311、电源供给子单元312。Specifically, the power output control unit 303 may include: an adjustment subunit 311 and a power supply subunit 312 .
其中，调整子单元311用于调整所述像素电路单元的OLED器件阴极电压VELVSS；具体地，调整子单元311以一设定电压值为VELVSS的初始值，每次调整时以设定步长增加VELVSS的值，并向电源供给子单元312输出调整的VELVSS的值。Wherein, the adjustment subunit 311 is used to adjust the cathode voltage VELVSS of the OLED device of the pixel circuit unit; specifically, the adjustment subunit 311 uses a set voltage value as the initial value of VELVSS , and adjusts each time at a set step Long increase the value of VELVSS , and output the adjusted value of VELVSS to the power supply subunit 312 .
电源供给子单元312用于在调整期间根据调整子单元311输出的调整的VELVSS的值为显示屏中各像素电路单元像素电路单元的OLED器件阴极供电；以及在根据电流稳定区间判断单元302输出的判断结果，确定出ID处于稳定区间内调整子单元311所调整到的VELVSS的最大值后，退出调整期进入稳定供电期；在稳定供电期则根据确定的ID处于稳定区间内的VELVSS的最大值为显示屏中的各像素电路单元的OLED器件阴极供电。电源供给子单元312具体用于根据所述电流稳定区间判断单元输出的ID不处于稳定区间的判断结果，将上次调整时的VELVSS的值确定为最大值后，根据确定的最大值为显示屏中各像素电路单元像素电路单元的OLED器件阴极供电。The power supply subunit 312 is used to supply power to the cathode of the OLED device of each pixel circuit unit pixel circuit unit in the display screen according to the value of the adjusted VELVSS output by the adjustment subunit 311 during the adjustment period; Afterdetermining the maximum value of V ELVSSadjusted by the adjustment subunit 311 in the stable interval, exit the adjustment period and enter the stable power supply period; in the stable power supply period, according to the determinedID in the stable interval The maximum value of VELVSS supplies power to the cathode of the OLED device of each pixel circuit unit in the display screen. The power supply subunit 312 is specifically configured to determine the value of VELVSS at the time of the last adjustment as the maximum value according to the judgment result that ID output by the current stable intervaljudgment unit is not in the stable interval, and then according to the determined maximum value as The OLED device cathode of each pixel circuit unit in the display screen is powered.
进一步，电源供给子单元312还可输出像素电路单元的DTFT源极电压VELVDD，以及器件亮度控制电压Vdata。Further, the power supply subunit 312 can also output the DTFT source voltage VELVDD of the pixel circuit unit and the device brightness control voltage Vdata .
本发明的主要技术方案中，调整像素电路单元的OLED器件阴极电压VELVSS，并实时检测像素电路单元的OLED器件电流ID；根据ID处于稳定区间内的VELVSS的最大值，为所述像素电路单元的OLED器件阴极供电。这样，处于稳定区间内的ID可以保证像素电路单元的OLED器件的亮度，同时，ID处于稳定区间内的最大的VELVSS可以有效降低OLED器件功耗，从而降低基于OLED器件的显示屏整体功耗。In the main technical scheme of the present invention, the OLED device cathode voltage VELVSS of the pixel circuit unit is adjusted, and the OLED device current ID of the pixel circuit unit is detected in real time; according to the maximum value of VELVSSwhere IDis in a stable interval, the The cathode of the OLED device of the pixel circuit unit supplies power. In this way, the ID in the stable range can ensure the brightness of theOLED device of the pixel circuit unit, and at the same time, the maximum VELVSS in which theID is in the stable range can effectively reduce the power consumption of the OLED device, thereby reducing the overall brightness of the display screen based on the OLED device. power consumption.
本技术领域技术人员可以理解，本发明包括涉及用于执行本申请中所述操作中的一项或多项的设备。这些设备可以为所需的目的而专门设计和制造，或者也可以包括通用计算机中的已知设备。这些设备具有存储在其内的计算机程序，这些计算机程序选择性地激活或重构。这样的计算机程序可以被存储在设备(例如，计算机)可读介质中或者存储在适于存储电子指令并分别耦联到总线的任何类型的介质中，所述计算机可读介质包括但不限于任何类型的盘(包括软盘、硬盘、光盘、CD-ROM、和磁光盘)、ROM(Read-Only Memory，只读存储器)、RAM(Random Access Memory，随即存储器)、EPROM(Erasable ProgrammableRead-Only Memory，可擦写可编程只读存储器)、EEPROM(Electrically ErasableProgrammable Read-Only Memory，电可擦可编程只读存储器)、闪存、磁性卡片或光线卡片。也就是，可读介质包括由设备(例如，计算机)以能够读的形式存储或传输信息的任何介质。Those skilled in the art will appreciate that the present invention includes devices related to performing one or more of the operations described in this application. These devices may be specially designed and fabricated for the required purposes, or they may include known devices found in general purpose computers. These devices have computer programs stored therein that are selectively activated or reconfigured. Such a computer program can be stored in a device (e.g., computer) readable medium, including but not limited to any type of medium suitable for storing electronic instructions and respectively coupled to a bus. Types of disks (including floppy disks, hard disks, CDs, CD-ROMs, and magneto-optical disks), ROM (Read-Only Memory, read-only memory), RAM (Random Access Memory, random access memory), EPROM (Erasable Programmable Read-Only Memory, Erasable Programmable Read-Only Memory), EEPROM (Electrically Erasable Programmable Read-Only Memory, Electrically Erasable Programmable Read-Only Memory), flash memory, magnetic card or optical card. That is, a readable medium includes any medium that stores or transmits information in a form readable by a device (eg, a computer).
本技术领域技术人员可以理解，可以用计算机程序指令来实现这些结构图和/或框图和/或流图中的每个框以及这些结构图和/或框图和/或流图中的框的组合。本技术领域技术人员可以理解，可以将这些计算机程序指令提供给通用计算机、专业计算机或其他可编程数据处理方法的处理器来实现，从而通过计算机或其他可编程数据处理方法的处理器来执行本发明公开的结构图和/或框图和/或流图的框或多个框中指定的方案。Those skilled in the art will understand that computer program instructions can be used to implement each block in these structural diagrams and/or block diagrams and/or flow diagrams and combinations of blocks in these structural diagrams and/or block diagrams and/or flow diagrams . Those skilled in the art can understand that these computer program instructions can be provided to general-purpose computers, professional computers, or processors of other programmable data processing methods for implementation, so that the computer or processors of other programmable data processing methods can execute the present invention. A scheme specified in a block or blocks of a structure diagram and/or a block diagram and/or a flow diagram of the invention disclosure.
本技术领域技术人员可以理解，本发明中已经讨论过的各种操作、方法、流程中的步骤、措施、方案可以被交替、更改、组合或删除。进一步地，具有本发明中已经讨论过的各种操作、方法、流程中的其他步骤、措施、方案也可以被交替、更改、重排、分解、组合或删除。进一步地，现有技术中的具有与本发明中公开的各种操作、方法、流程中的步骤、措施、方案也可以被交替、更改、重排、分解、组合或删除。Those skilled in the art can understand that the various operations, methods, and steps, measures, and solutions in the processes discussed in the present invention can be replaced, changed, combined, or deleted. Further, other steps, measures, and schemes in the various operations, methods, and processes that have been discussed in the present invention may also be replaced, changed, rearranged, decomposed, combined, or deleted. Further, steps, measures, and schemes in the prior art that have operations, methods, and processes disclosed in the present invention can also be alternated, changed, rearranged, decomposed, combined, or deleted.
所属领域的普通技术人员应当理解：以上任何实施例的讨论仅为示例性的，并非旨在暗示本公开的范围(包括权利要求)被限于这些例子；在本发明的思路下，以上实施例或者不同实施例中的技术特征之间也可以进行组合，步骤可以以任意顺序实现，并存在如上所述的本发明的不同方面的许多其它变化，为了简明它们没有在细节中提供。因此，凡在本发明的精神和原则之内，所做的任何省略、修改、等同替换、改进等，均应包含在本发明的保护范围之内。Those of ordinary skill in the art should understand that: the discussion of any of the above embodiments is exemplary only, and is not intended to imply that the scope of the present disclosure (including claims) is limited to these examples; under the idea of the present invention, the above embodiments or Combinations between technical features in different embodiments are also possible, steps may be carried out in any order, and there are many other variations of the different aspects of the invention as described above, which are not presented in detail for the sake of brevity. Therefore, any omissions, modifications, equivalent replacements, improvements, etc. within the spirit and principles of the present invention shall be included within the protection scope of the present invention.
| Application Number | Priority Date | Filing Date | Title |
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| CN201811095038.6ACN109036286A (en) | 2018-09-19 | 2018-09-19 | The method for managing power supply and device of display screen and its pixel circuit unit |
| Application Number | Priority Date | Filing Date | Title |
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| CN201811095038.6ACN109036286A (en) | 2018-09-19 | 2018-09-19 | The method for managing power supply and device of display screen and its pixel circuit unit |
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| CN109036286Atrue CN109036286A (en) | 2018-12-18 |
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| CN201811095038.6APendingCN109036286A (en) | 2018-09-19 | 2018-09-19 | The method for managing power supply and device of display screen and its pixel circuit unit |
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