技术领域technical field
本发明涉及显示驱动技术领域，尤其涉及一种驱动电路、驱动方法和显示装置。The present invention relates to the technical field of display driving, in particular to a driving circuit, a driving method and a display device.
背景技术Background technique
液晶显示面板通常需要根据不同的液晶材料来设计硬件驱动电路，其功能主要是使LCD(液晶显示器)显示正常的图片画面，以进行显示的检测及验证。在传统的LCD的硬件驱动电路方案中，显示模块由三部分组成，TCON(时序控制器)输出显示信号与各种时序，与LCD Driver IC(驱动集成电路)对接，Power IC(电源集成电路)提供各种供电电压，P-Gamma(Gamma(伽马)电压生成器)输出Gamma电压。Liquid crystal display panels usually need to design hardware drive circuits according to different liquid crystal materials, and its main function is to make the LCD (liquid crystal display) display normal picture images for display detection and verification. In the traditional LCD hardware drive circuit scheme, the display module is composed of three parts, TCON (timing controller) outputs display signals and various timings, and interfaces with LCD Driver IC (driver integrated circuit), Power IC (power integrated circuit) Various supply voltages are available, and P-Gamma (Gamma (gamma) voltage generator) outputs Gamma voltage.
现有的应用于多稳态液晶显示面板的驱动电路不能通过显示驱动单元在控制单元输出的频率控制信号的控制下，生成具有高幅值的具有不同固定频率的方波显示控制信号，从而不能通过显示驱动单元方便的控制多稳态液晶显示面板处于不同的显示状态。Existing drive circuits applied to multi-stable liquid crystal display panels cannot generate square wave display control signals with high amplitudes and different fixed frequencies through the display drive unit under the control of the frequency control signal output by the control unit, so that they cannot The display driving unit conveniently controls the multi-stable liquid crystal display panel to be in different display states.
发明内容Contents of the invention
本发明的主要目的在于提供一种驱动电路、驱动方法和显示装置，以解决现有的应用于多稳态液晶显示面板的驱动电路不能通过显示驱动单元在控制单元输出的频率控制信号的控制下，生成具有高幅值的具有不同固定频率的方波显示控制信号，从而不能通过显示驱动单元方便的控制多稳态液晶显示面板处于不同的显示状态的问题。The main purpose of the present invention is to provide a driving circuit, a driving method and a display device to solve the problem that the existing driving circuit applied to a multi-stable liquid crystal display panel cannot be controlled by the frequency control signal output by the control unit through the display driving unit. , generate square wave display control signals with high amplitude and different fixed frequencies, so that the multi-stable liquid crystal display panel cannot be conveniently controlled to be in different display states through the display drive unit.
为了达到上述目的，本发明提供了一种驱动电路，应用于多稳态液晶显示面板，包括控制单元和显示驱动单元，其中，In order to achieve the above object, the present invention provides a driving circuit applied to a multi-stable liquid crystal display panel, including a control unit and a display driving unit, wherein,
所述控制单元，与所述显示驱动单元连接，用于向所述显示驱动单元输出频率控制信号；The control unit is connected to the display driving unit, and is used to output a frequency control signal to the display driving unit;
所述显示驱动单元，用于根据所述频率控制信号生成并输出具有固定频率的方波显示控制信号和具有固定频率的方波公共电极电压信号，并将该方波显示控制信号和该方波公共电极电压信号传送至多稳态液晶显示面板，以使得所述多稳态液晶显示面板根据该方波显示控制信号和该方波公共电极电压信号以处于相应的显示状态；The display drive unit is configured to generate and output a square wave display control signal with a fixed frequency and a square wave common electrode voltage signal with a fixed frequency according to the frequency control signal, and combine the square wave display control signal with the square wave The common electrode voltage signal is transmitted to the multi-stable liquid crystal display panel, so that the multi-stable liquid crystal display panel is in a corresponding display state according to the square wave display control signal and the square wave common electrode voltage signal;
所述方波显示控制信号的频率与所述方波公共电极电压信号的频率相等；所述方波显示控制信号的幅值大于预定幅值。The frequency of the square wave display control signal is equal to the frequency of the square wave common electrode voltage signal; the amplitude of the square wave display control signal is greater than a predetermined amplitude.
实施时，所述方波显示控制信号包括对应于磨砂显示状态的第一方波显示控制信号和对应于清空显示状态的第二方波显示控制信号；During implementation, the square wave display control signal includes a first square wave display control signal corresponding to the matte display state and a second square wave display control signal corresponding to the clear display state;
所述第一方波显示控制信号的频率大于所述第二方波显示控制信号的频率。The frequency of the first square wave display control signal is greater than the frequency of the second square wave display control signal.
实施时，所述多稳态液晶显示面板的有效显示区被划分为N个单独显示控制的显示区块；N为大于1的正整数；During implementation, the effective display area of the multi-stable liquid crystal display panel is divided into N display blocks for individual display control; N is a positive integer greater than 1;
所述显示驱动单元具体用于生成分别对应于N个所述显示区块的N个方波显示控制信号；The display driving unit is specifically configured to generate N square wave display control signals respectively corresponding to the N display blocks;
所述显示驱动单元包括N个方波显示控制信号输出端；The display drive unit includes N square wave display control signal output terminals;
每一所述显示区块分别通过一显示控制端与所述显示驱动单元的一所述方波显示控制信号输出端连接，该显示区块根据所述方波公共电极电压信号和来自该方波显示控制信号输出端的方波显示控制信号以处于相应的显示状态。Each of the display blocks is respectively connected to a square-wave display control signal output port of the display drive unit through a display control terminal, and the display block is connected to the square-wave common electrode voltage signal according to the square-wave common electrode voltage signal and the square-wave Display the square wave display control signal at the output of the control signal to be in the corresponding display state.
实施时，所述方波信号生成单元包括N个方波显示控制信号生成模块和一个方波公共电极电压信号生成模块；During implementation, the square wave signal generation unit includes N square wave display control signal generation modules and a square wave common electrode voltage signal generation module;
所述方波显示控制信号生成模块用于控制生成并输出方波显示控制信号；The square wave display control signal generating module is used for controlling generation and outputting a square wave display control signal;
所述方波公共电极电压信号生成模块用于控制生成并输出方波公共电极电压信号。The square-wave common electrode voltage signal generation module is used to control the generation and output of a square-wave common electrode voltage signal.
实施时，所述控制单元包括第一显示频率控制信号输出端和第二显示频率控制信号输出端；During implementation, the control unit includes a first display frequency control signal output terminal and a second display frequency control signal output terminal;
所述控制单元具体用于通过第一显示频率控制信号输出端输出第一显示频率控制信号，通过第二显示频率控制信号输出端输出第二显示频率控制信号；The control unit is specifically configured to output a first display frequency control signal through a first display frequency control signal output terminal, and output a second display frequency control signal through a second display frequency control signal output terminal;
所述方波显示控制信号生成模块包括：The square wave display control signal generation module includes:
第一电阻；第一控制TFT，栅极通过所述第一电阻与第一显示频率控制信号输出端连接，第一极接地；The first resistor; the first control TFT, the gate is connected to the output terminal of the first display frequency control signal through the first resistor, and the first pole is grounded;
第二电阻；second resistor;
第二控制TFT，栅极通过所述第二电阻与所述第一控制TFT的第二极连接，第一极与直流电压信号输出端连接，第二极与方波显示控制信号输出端连接；For the second control TFT, the gate is connected to the second pole of the first control TFT through the second resistor, the first pole is connected to the DC voltage signal output terminal, and the second pole is connected to the square wave display control signal output terminal;
第三电阻；third resistor;
第一控制MOS管，栅极通过所述第三电阻与第二显示频率控制信号输出端连接，第一极接地，第二极与所述方波显示控制信号输出端连接；以及，The first control MOS transistor, the gate is connected to the output terminal of the second display frequency control signal through the third resistor, the first pole is grounded, and the second pole is connected to the output terminal of the square wave display control signal; and,
第四电阻，第一端与所述第一控制MOS管的栅极连接，第二端接地；A fourth resistor, the first end of which is connected to the gate of the first control MOS transistor, and the second end of which is grounded;
所述第一控制TFT为n型TFT，所述第二控制TFT为p型TFT，所述第一控制MOS管为NMOS管；The first control TFT is an n-type TFT, the second control TFT is a p-type TFT, and the first control MOS transistor is an NMOS transistor;
当所述第一显示频率控制信号输出端输出高电平，所述第二显示频率控制信号输出端端输出低电平时，所述方波显示控制信号输出端输出高电平；When the output terminal of the first display frequency control signal outputs a high level and the output terminal of the second display frequency control signal outputs a low level, the output terminal of the square wave display control signal outputs a high level;
当所述第一显示频率控制信号输出端输出低电平，所述第二显示频率控制信号输出端输出高电平时，所述方波显示控制信号输出端输出低电平。When the first display frequency control signal output terminal outputs a low level and the second display frequency control signal output terminal outputs a high level, the square wave display control signal output terminal outputs a low level.
实施时，所述控制单元包括第一公共频率控制信号输出端和第二公共频率控制信号输出端；During implementation, the control unit includes a first common frequency control signal output terminal and a second common frequency control signal output terminal;
所述控制单元具体用于通过第一公共频率控制信号输出端输出第一公共频率控制信号，通过第二公共频率控制信号输出端输出第二公共频率控制信号；The control unit is specifically configured to output the first common frequency control signal through the first common frequency control signal output terminal, and output the second common frequency control signal through the second common frequency control signal output terminal;
所述方波公共电极电压信号生成模块包括：The square wave common electrode voltage signal generation module includes:
第五电阻；fifth resistor;
第三控制TFT，栅极通过所述第五电阻与第一公共频率控制信号输出端连接，第一极接地；The third control TFT, the gate is connected to the first common frequency control signal output terminal through the fifth resistor, and the first pole is grounded;
第六电阻；Sixth resistor;
第四控制TFT，栅极通过所述第六电阻与所述第一控制TFT的第二极连接，第一极与直流电压信号输出端连接，第二极与方波公共电极电压信号输出端连接；For the fourth control TFT, the gate is connected to the second pole of the first control TFT through the sixth resistor, the first pole is connected to the DC voltage signal output terminal, and the second pole is connected to the square wave common electrode voltage signal output terminal ;
第七电阻；Seventh resistance;
第二控制MOS管，栅极通过所述第七电阻通过所述第三电阻与第二公共频率控制信号输出端连接，第一极接地，第二极与所述方波公共电极电压信号输出端连接；以及，The second control MOS transistor, the gate is connected to the second common frequency control signal output terminal through the seventh resistor and the third resistor, the first pole is grounded, and the second pole is connected to the square wave common electrode voltage signal output terminal connection; and,
第八电阻，第一端与所述第二控制MOS管的栅极连接，第二端接地；An eighth resistor, the first end of which is connected to the gate of the second control MOS transistor, and the second end of which is grounded;
所述第三控制TFT为n型TFT，所述第四控制TFT为p型TFT，所述第二控制MOS管为NMOS管；The third control TFT is an n-type TFT, the fourth control TFT is a p-type TFT, and the second control MOS transistor is an NMOS transistor;
当所述第一公共频率控制信号输出端输出高电平，所述第二公共频率控制信号输出端输出低电平时，所述方波公共电极电压信号输出端输出高电平；When the output terminal of the first common frequency control signal outputs a high level and the output terminal of the second common frequency control signal outputs a low level, the output terminal of the square wave common electrode voltage signal outputs a high level;
当所述第一公共频率控制信号输出端输出低电平，所述第二公共频率控制信号输出端输出高电平时，所述方波公共电极电压信号输出端输出低电平。When the output terminal of the first common frequency control signal outputs a low level and the output terminal of the second common frequency control signal outputs a high level, the output terminal of the square wave common electrode voltage signal outputs a low level.
实施时，本发明所述的驱动电路还包括：遥控单元，与所述控制单元无线或有线连接；During implementation, the driving circuit of the present invention further includes: a remote control unit connected wirelessly or wired to the control unit;
所述遥控单元用于向所述控制单元发出遥控信号；The remote control unit is used to send a remote control signal to the control unit;
所述控制单元用于在所述遥控信号的控制下输出相应的频率控制信号。The control unit is used for outputting a corresponding frequency control signal under the control of the remote control signal.
本发明还提供了一种驱动方法，应用于上述的驱动电路，所述驱动方法包括：The present invention also provides a driving method, which is applied to the above-mentioned driving circuit, and the driving method includes:
控制单元向显示驱动单元输出频率控制信号；The control unit outputs a frequency control signal to the display drive unit;
所述显示驱动单元根据所述频率控制信号生成并输出具有固定频率的方波显示控制信号和具有固定频率的方波公共电极电压信号，并将该方波显示控制信号和该方波公共电极电压信号传送至多稳态液晶显示面板，以使得所述多稳态液晶显示面板根据该方波显示控制信号和该方波公共电极电压信号以处于相应的显示状态；The display driving unit generates and outputs a square wave display control signal with a fixed frequency and a square wave common electrode voltage signal with a fixed frequency according to the frequency control signal, and outputs the square wave display control signal and the square wave common electrode voltage signal The signal is sent to the multi-stable liquid crystal display panel, so that the multi-stable liquid crystal display panel is in a corresponding display state according to the square wave display control signal and the square wave common electrode voltage signal;
所述方波显示控制信号的频率与所述方波公共电极电压信号的频率相等；所述方波显示控制信号的幅值大于预定幅值。The frequency of the square wave display control signal is equal to the frequency of the square wave common electrode voltage signal; the amplitude of the square wave display control signal is greater than a predetermined amplitude.
本发明还提供了一种显示装置，包括多稳态液晶显示面板，还包括上述的驱动电路。The present invention also provides a display device, which includes a multi-stable liquid crystal display panel and the above-mentioned drive circuit.
与现有技术相比，本发明所述的驱动电路、驱动方法和显示装置，通过采用控制单元向所述显示驱动单元输出频率控制信号，所述显示驱动单元，根据所述频率控制信号生成并输出具有固定频率的方波显示控制信号和具有固定频率的方波公共电极电压信号，并将该方波显示控制信号和该方波公共电极电压信号传送至多稳态液晶显示面板，以使得所述多稳态液晶显示面板根据该方波显示控制信号和该方波公共电极电压信号以处于相应的显示状态，可以简单快速成本低的切换多稳态液晶显示面板的显示状态。Compared with the prior art, the driving circuit, driving method and display device of the present invention use a control unit to output a frequency control signal to the display driving unit, and the display driving unit generates and Outputting a square-wave display control signal with a fixed frequency and a square-wave common electrode voltage signal with a fixed frequency, and transmitting the square-wave display control signal and the square-wave common electrode voltage signal to a multi-stable liquid crystal display panel, so that the The multistable liquid crystal display panel is in a corresponding display state according to the square wave display control signal and the square wave common electrode voltage signal, and the display state of the multistable liquid crystal display panel can be switched simply, quickly and at low cost.
附图说明Description of drawings
图1是本发明实施例所述的驱动电路的结构框图；Fig. 1 is a structural block diagram of the drive circuit described in the embodiment of the present invention;
图2是所述多稳态液晶显示面板的有效显示区由左至右划分为八个显示区块的示意图；Fig. 2 is a schematic diagram showing that the effective display area of the multi-stable liquid crystal display panel is divided into eight display blocks from left to right;
图3是在本发明实施例所述的驱动电路中，用于驱动上述第一显示区块的所述方波显示控制信号生成模块的一具体实施例的电路图；3 is a circuit diagram of a specific embodiment of the square wave display control signal generating module used to drive the first display block in the driving circuit according to the embodiment of the present invention;
图4是在本发明实施例所述的驱动电路中，用于驱动上述第一显示区块的所述方波公共电极电压控制信号生成模块的一具体实施例的电路图；4 is a circuit diagram of a specific embodiment of the square wave common electrode voltage control signal generating module used to drive the first display block in the driving circuit according to the embodiment of the present invention;
图5是本发明实施例所述的驱动电路在实际应用时可采用的输入输出模块的示意图；Fig. 5 is a schematic diagram of an input and output module that can be used in the practical application of the drive circuit described in the embodiment of the present invention;
图6是本发明所述的驱动电路的一具体实施例的结构示意图；FIG. 6 is a schematic structural view of a specific embodiment of the drive circuit of the present invention;
图7是本发明实施例所述的驱动电路在工作时在两种稳态之间切换的流程图；Fig. 7 is a flow chart of switching between two steady states when the driving circuit described in the embodiment of the present invention is working;
图8是本发明实施例所述的驱动方法的流程图。Fig. 8 is a flow chart of the driving method described in the embodiment of the present invention.
具体实施方式detailed description
下面将结合本发明实施例中的附图，对本发明实施例中的技术方案进行清楚、完整地描述，显然，所描述的实施例仅仅是本发明一部分实施例，而不是全部的实施例。基于本发明中的实施例，本领域普通技术人员在没有做出创造性劳动前提下所获得的所有其他实施例，都属于本发明保护的范围。The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.
如图1所示，本发明实施例所述的驱动电路，应用于多稳态液晶显示面板10，包括控制单元11和显示驱动单元12，其中，As shown in FIG. 1, the driving circuit described in the embodiment of the present invention is applied to a multi-stable liquid crystal display panel 10, and includes a control unit 11 and a display driving unit 12, wherein,
所述控制单元11，与所述显示驱动单元12连接，用于向所述显示驱动单元12输出频率控制信号；The control unit 11 is connected to the display driving unit 12, and is used to output a frequency control signal to the display driving unit 12;
所述显示驱动单元12，与所述多稳态液晶显示面板10连接，用于根据所述频率控制信号生成并输出具有固定频率的方波显示控制信号和具有固定频率的方波公共电极电压信号，并将该方波显示控制信号和该方波公共电极电压信号传送至多稳态液晶显示面板10，以使得所述多稳态液晶显示面板根据该方波显示控制信号和该方波公共电极电压信号以处于相应的显示状态；The display driving unit 12 is connected to the multi-stable liquid crystal display panel 10, and is used to generate and output a square wave display control signal with a fixed frequency and a square wave common electrode voltage signal with a fixed frequency according to the frequency control signal , and transmit the square wave display control signal and the square wave common electrode voltage signal to the multistable liquid crystal display panel 10, so that the multistable liquid crystal display panel signal to be in the corresponding display state;
所述方波显示控制信号的频率与所述方波公共电极电压信号的频率相等；所述方波显示控制信号的幅值大于预定幅值。The frequency of the square wave display control signal is equal to the frequency of the square wave common electrode voltage signal; the amplitude of the square wave display control signal is greater than a predetermined amplitude.
所述方波显示控制信号的频率与所述方波公共电极电压信号的频率相等；所述方波显示控制信号的幅值大于预定幅值。The frequency of the square wave display control signal is equal to the frequency of the square wave common electrode voltage signal; the amplitude of the square wave display control signal is greater than a predetermined amplitude.
所述预定幅值会根据显示面板的尺寸不同和液晶盒厚不同而有所不同，例如14寸盒厚为8um的液晶显示面板对应的预定幅值为75V，14寸盒厚为12um的液晶显示面板对应的预定幅值为45V，19寸盒厚为8um的液晶显示面板对应的预定幅值为110V。The predetermined amplitude will vary according to the size of the display panel and the thickness of the liquid crystal cell. For example, the predetermined amplitude corresponding to a 14-inch liquid crystal display panel with a cell thickness of 8um is 75V, and a liquid crystal display panel with a 14-inch cell thickness of 12um. The predetermined amplitude corresponding to the panel is 45V, and the predetermined amplitude corresponding to the liquid crystal display panel with a 19-inch box thickness of 8um is 110V.
由于多稳态液晶需要几十伏电压驱动，因此所述方波显示控制信号的幅值需要大于预定幅值，所述预定幅值例如可以为45V、75V、110V等。Since the multi-stable liquid crystal needs tens of volts to drive, the amplitude of the square wave display control signal needs to be greater than a predetermined amplitude, which can be 45V, 75V, 110V, etc., for example.
本发明实施例所述的应用于多稳态液晶显示面板的驱动电路通过采用控制单元11向所述显示驱动单元12输出频率控制信号，所述显示驱动单元12，根据所述频率控制信号生成并输出具有固定频率的方波显示控制信号和具有固定频率的方波公共电极电压信号，并将该方波显示控制信号和该方波公共电极电压信号传送至多稳态液晶显示面板，以使得所述多稳态液晶显示面板根据该方波显示控制信号和该方波公共电极电压信号以处于相应的显示状态，可以简单快速成本低的切换多稳态液晶显示面板的显示状态。The drive circuit applied to the multi-stable liquid crystal display panel described in the embodiment of the present invention uses the control unit 11 to output a frequency control signal to the display drive unit 12, and the display drive unit 12 generates and Outputting a square-wave display control signal with a fixed frequency and a square-wave common electrode voltage signal with a fixed frequency, and transmitting the square-wave display control signal and the square-wave common electrode voltage signal to a multi-stable liquid crystal display panel, so that the The multistable liquid crystal display panel is in a corresponding display state according to the square wave display control signal and the square wave common electrode voltage signal, and the display state of the multistable liquid crystal display panel can be switched simply, quickly and at low cost.
在实际操作时，所述显示驱动单元12可以包括升压电流和DC/AC(交流/直流)模块，多稳态液晶需要几十伏电压驱动，需要通过低压瞬间升压实现，此外需要DC/AC模块将输入直流电压转换为固定频率的方波信号，从而实现与多稳态液晶显示面板的信号对接。所述控制单元11可以设置于单片机中，所述控制单元11可以通过控制显示驱动单元12而实现高低频率的互相切换，其中单片机成本低，且对程序的兼容性较高。In actual operation, the display drive unit 12 may include a step-up current and a DC/AC (alternating current/direct current) module. The multi-stable liquid crystal needs to be driven by a voltage of tens of volts, which needs to be realized by a low-voltage instantaneous boost. In addition, a DC/AC The AC module converts the input DC voltage into a fixed frequency square wave signal, so as to realize the signal connection with the multi-stable liquid crystal display panel. The control unit 11 can be set in a single-chip microcomputer. The control unit 11 can switch between high and low frequencies by controlling the display drive unit 12. The single-chip microcomputer has low cost and high compatibility with programs.
本发明实施例所述的驱动方法应用于的多稳态液晶显示面板采用了一种近晶型液晶，近晶型液晶具有层内流动，层间不流动的二维有序特性，而且在不同电压驱动下呈现不同稳定状态，因此可被用于多稳态液晶显示。这种多稳态技术制作工艺较为简单，具有成本优势。The multi-stable liquid crystal display panel to which the driving method described in the embodiment of the present invention is applied adopts a smectic liquid crystal. It shows different stable states under voltage driving, so it can be used in multi-stable liquid crystal display. The manufacturing process of this multi-stable technology is relatively simple and has a cost advantage.
具体的，所述方波显示控制信号可以包括对应于磨砂显示状态的第一方波显示控制信号和对应于清空显示状态的第二方波显示控制信号；Specifically, the square wave display control signal may include a first square wave display control signal corresponding to the matte display state and a second square wave display control signal corresponding to the clear display state;
所述第一方波显示控制信号的频率大于所述第二方波显示控制信号的频率。The frequency of the first square wave display control signal is greater than the frequency of the second square wave display control signal.
所述第一方波显示控制信号对应于磨砂显示状态，第二方波显示控制信号对应于清空显示状态，该两种显示状态分别对应散射态的防窥模式和透射态的非防窥模式。在具体实施时，所述第一方波显示控制信号的频率可以为1KHz(千赫兹)，所述第二方波显示控制信号的频率可以为50Hz(赫兹)。在实际操作时，根据不同的实际情况，该第一方波显示控制信号的频率和/或所述第二方波显示控制信号的频率也可被设置为其他值，在此对其取值并不作限定。The first square-wave display control signal corresponds to a frosted display state, and the second square-wave display control signal corresponds to a clear display state, and the two display states respectively correspond to the privacy-prevention mode in the scattering state and the non-peep-proof mode in the transmission state. In a specific implementation, the frequency of the first square wave display control signal may be 1 KHz (kilohertz), and the frequency of the second square wave display control signal may be 50 Hz (Hertz). In actual operation, according to different actual situations, the frequency of the first square wave display control signal and/or the frequency of the second square wave display control signal can also be set to other values, which are taken here and Not limited.
具体的，所述多稳态液晶显示面板的有效显示区被划分为N个单独显示控制的显示区块；N为大于1的正整数；Specifically, the effective display area of the multi-stable liquid crystal display panel is divided into N display blocks for individual display control; N is a positive integer greater than 1;
所述显示驱动单元具体用于生成分别对应于N个所述显示区块的N个方波显示控制信号；The display driving unit is specifically configured to generate N square wave display control signals respectively corresponding to the N display blocks;
所述显示驱动单元包括N个方波显示控制信号输出端；The display drive unit includes N square wave display control signal output terminals;
每一所述显示区块分别通过一显示控制端与所述显示驱动单元的一所述方波显示控制信号输出端连接，该显示区块根据所述方波公共电极电压信号和来自该方波显示控制信号输出端的方波显示控制信号以处于相应的显示状态。Each of the display blocks is respectively connected to a square-wave display control signal output port of the display drive unit through a display control terminal, and the display block is connected to the square-wave common electrode voltage signal according to the square-wave common electrode voltage signal and the square-wave Display the square wave display control signal at the output of the control signal to be in the corresponding display state.
在实际操作时，可以将所述多稳态液晶显示面板的有效显示区分别多个显示区块，然后对每个显示区块分别进行显示状态控制。In actual operation, the effective display area of the multi-stable liquid crystal display panel can be divided into multiple display blocks, and then the display state of each display block is controlled separately.
如图2所示，所述多稳态液晶显示面板的有效显示区由左至右划分为八个显示区块，每个显示区块分别与一方波显示控制信号输出端连接；As shown in Figure 2, the effective display area of the multi-stable liquid crystal display panel is divided into eight display blocks from left to right, and each display block is connected to the output terminal of a square wave display control signal;
从左至右的第一显示区块与第一方波显示控制信号输出端SEG1连接；The first display block from left to right is connected to the first square wave display control signal output terminal SEG1;
从左至右的第二显示区块与第二方波显示控制信号输出端SEG2连接；The second display block from left to right is connected to the second square wave display control signal output terminal SEG2;
从左至右的第三显示区块与第三方波显示控制信号输出端SEG3连接；The third display block from left to right is connected to the third-party wave display control signal output terminal SEG3;
从左至右的第四显示区块与第四方波显示控制信号输出端SEG4连接；The fourth display block from left to right is connected to the fourth square wave display control signal output terminal SEG4;
从左至右的第五显示区块与第五方波显示控制信号输出端SEG5连接；The fifth display block from left to right is connected to the fifth square wave display control signal output terminal SEG5;
从左至右的第六显示区块与第六方波显示控制信号输出端SEG6连接；The sixth display block from left to right is connected to the sixth square wave display control signal output terminal SEG6;
从左至右的第七显示区块与第七方波显示控制信号输出端SEG7连接；The seventh display block from left to right is connected to the seventh square wave display control signal output terminal SEG7;
从左至右的第八显示区块与第八方波显示控制信号输出端SEG8连接；The eighth display block from left to right is connected to the eighth square wave display control signal output terminal SEG8;
所述多稳态液晶显示面板还与方波公共电极电压信号输出端COM连接。The multi-stable liquid crystal display panel is also connected to the square-wave common electrode voltage signal output terminal COM.
在实际操作时，显示区块的划分也可以有其他的方式，例如从上至下划分，或者是其他任何可能的划分方式，对显示区块的具体划分方式不作限定。In actual operation, there may be other ways of dividing the display blocks, such as dividing from top to bottom, or any other possible way of dividing, and the specific way of dividing the display blocks is not limited.
当驱动电路的输出功率有限时，只能分为多个显示区块分别控制，禁止整屏操作，然而当驱动电路的输出功率高时，也可以整屏操作。When the output power of the driving circuit is limited, it can only be divided into a plurality of display blocks and controlled separately, and full-screen operation is prohibited. However, when the output power of the driving circuit is high, full-screen operation is also possible.
当所述多稳态液晶显示面板包括多个显示区块时，所述显示驱动单元在所述控制信号生成的多组频率控制信号的控制下分别向多个显示驱动输出相应的方波显示控制信号，以控制所述多个显示区块分别处于相应的显示状态。When the multi-stable liquid crystal display panel includes a plurality of display blocks, the display driving unit outputs corresponding square wave display control to the plurality of display drivers under the control of multiple groups of frequency control signals generated by the control signal signals, so as to control the plurality of display blocks to be in corresponding display states.
具体的，当所述多稳态液晶显示面板的有效显示区被划分为N个单独显示控制的显示区块时，所述方波信号生成单元包括N个方波显示控制信号生成模块和一个方波公共电极电压信号生成模块；Specifically, when the effective display area of the multi-stable liquid crystal display panel is divided into N display blocks for individual display control, the square wave signal generation unit includes N square wave display control signal generation modules and a square wave wave common electrode voltage signal generation module;
所述方波显示控制信号生成模块用于控制生成并输出方波显示控制信号；The square wave display control signal generating module is used for controlling generation and outputting a square wave display control signal;
所述方波公共电极电压信号生成模块用于控制生成并输出方波公共电极电压信号。The square-wave common electrode voltage signal generation module is used to control the generation and output of a square-wave common electrode voltage signal.
在实际操作时，所述显示驱动单元可以根据来自单片机(即频率控制单元)的频率控制信号通过斩波放大电路，输出驱动液晶所需要的高幅值方波信号，可以根据显示状态的要求输出两种频率的方波信号，从而实现与多稳态液晶显示面板的信号对接，频率控制以及后面记载的中断算法由内部编程实现。In actual operation, the display drive unit can output the high-amplitude square wave signal required to drive the liquid crystal through the chopper amplifier circuit according to the frequency control signal from the single-chip microcomputer (ie, the frequency control unit), and can output according to the requirements of the display state. Two kinds of frequency square wave signals, so as to realize the signal connection with the multi-stable liquid crystal display panel, the frequency control and the interrupt algorithm described later are realized by internal programming.
具体的，所述控制单元包括第一显示频率控制信号输出端和第二显示频率控制信号输出端；Specifically, the control unit includes a first display frequency control signal output terminal and a second display frequency control signal output terminal;
所述控制单元具体用于通过第一显示频率控制信号输出端输出第一显示频率控制信号，通过第二显示频率控制信号输出端输出第二显示频率控制信号；The control unit is specifically configured to output a first display frequency control signal through a first display frequency control signal output terminal, and output a second display frequency control signal through a second display frequency control signal output terminal;
所述方波显示控制信号生成模块包括：The square wave display control signal generation module includes:
第一电阻；第一控制TFT，栅极通过所述第一电阻与第一显示频率控制信号输出端连接，第一极接地；The first resistor; the first control TFT, the gate is connected to the output terminal of the first display frequency control signal through the first resistor, and the first pole is grounded;
第二电阻；second resistor;
第二控制TFT，栅极通过所述第二电阻与所述第一控制TFT的第二极连接，第一极与直流电压信号输出端连接，第二极与方波显示控制信号输出端连接；For the second control TFT, the gate is connected to the second pole of the first control TFT through the second resistor, the first pole is connected to the DC voltage signal output terminal, and the second pole is connected to the square wave display control signal output terminal;
第三电阻；third resistor;
第一控制MOS管，栅极通过所述第三电阻与第二显示频率控制信号输出端连接，第一极接地，第二极与所述方波显示控制信号输出端连接；以及，The first control MOS transistor, the gate is connected to the output terminal of the second display frequency control signal through the third resistor, the first pole is grounded, and the second pole is connected to the output terminal of the square wave display control signal; and,
第四电阻，第一端与所述第一控制MOS管的栅极连接，第二端接地；A fourth resistor, the first end of which is connected to the gate of the first control MOS transistor, and the second end of which is grounded;
所述第一控制TFT为n型TFT(Thin Film Transistor,薄膜晶体管)，所述第二控制TFT为p型TFT，所述第一控制MOS管为NMOS(N-Metal-Oxide-Semiconductor，N型金属-氧化物-半导体)晶体管；The first control TFT is an n-type TFT (Thin Film Transistor, thin film transistor), the second control TFT is a p-type TFT, and the first control MOS transistor is an NMOS (N-Metal-Oxide-Semiconductor, N-type metal-oxide-semiconductor) transistors;
当所述第一显示频率控制信号输出端输出高电平，所述第二显示频率控制信号输出端端输出低电平时，所述方波显示控制信号输出端输出高电平；When the output terminal of the first display frequency control signal outputs a high level and the output terminal of the second display frequency control signal outputs a low level, the output terminal of the square wave display control signal outputs a high level;
当所述第一显示频率控制信号输出端输出低电平，所述第二显示频率控制信号输出端输出高电平时，所述方波显示控制信号输出端输出低电平。When the first display frequency control signal output terminal outputs a low level and the second display frequency control signal output terminal outputs a high level, the square wave display control signal output terminal outputs a low level.
例如，如图3所示，在本发明实施例所述的驱动电路中，用于驱动上述第一显示区块的所述方波显示控制信号生成模块的一具体实施例可以包括：For example, as shown in FIG. 3, in the driving circuit according to the embodiment of the present invention, a specific embodiment of the square wave display control signal generation module for driving the first display block may include:
第一电阻R1；The first resistor R1;
标号为T1的第一控制TFT，栅极通过所述第一电阻R1与第一显示频率控制信号输出端SEG1-H连接，源极与地端RF_GND连接；The gate of the first control TFT labeled T1 is connected to the first display frequency control signal output terminal SEG1-H through the first resistor R1, and the source is connected to the ground terminal RF_GND;
第二电阻R2；The second resistor R2;
标号为T2的第二控制TFT，栅极通过第二电阻R2与标号为T1的所述第一控制TFT的第二极连接，源极与输出直流电压信号HV5的直流电压信号输出端连接，漏极与第一方波显示控制信号输出端SEG1连接；The gate of the second control TFT labeled T2 is connected to the second pole of the first control TFT labeled T1 through the second resistor R2, the source is connected to the DC voltage signal output end of the output DC voltage signal HV5, and the drain pole is connected with the first square wave display control signal output terminal SEG1;
第三电阻R3；The third resistor R3;
第一控制MOS管M1，栅极通过所述第三电阻R3与第二显示频率控制信号输出端SEG1-L连接，源极与地端RF_GND连接，漏极与所述第一方波显示控制信号输出端SEG1连接；以及，The first control MOS transistor M1, the gate is connected to the second display frequency control signal output terminal SEG1-L through the third resistor R3, the source is connected to the ground terminal RF_GND, and the drain is connected to the first square wave display control signal the output SEG1 connection; and,
第四电阻R4，第一端与所述第一控制MOS管M1的栅极连接，第二端与地端RF_GND连接；The fourth resistor R4 has a first end connected to the gate of the first control MOS transistor M1, and a second end connected to the ground terminal RF_GND;
T1为n型TFT，T2为p型TFT，M1为NMOS管；T1 is an n-type TFT, T2 is a p-type TFT, and M1 is an NMOS tube;
当所述第一显示频率控制信号输出端SEG1-H输出高电平，所述第二显示频率控制信号输出端SEG1-L端输出低电平时，所述第一方波显示控制信号输出端SEG1输出高电平；When the first display frequency control signal output terminal SEG1-H outputs a high level, and the second display frequency control signal output terminal SEG1-L outputs a low level, the first square wave display control signal output terminal SEG1 Output high level;
当所述第一显示频率控制信号输出端SEG1-H输出低电平，所述第二显示频率控制信号输出端SEG1-L输出高电平时，所述第一方波显示控制信号输出端SEG1输出低电平。When the first display frequency control signal output terminal SEG1-H outputs a low level, and the second display frequency control signal output terminal SEG1-L outputs a high level, the first square wave display control signal output terminal SEG1 outputs low level.
在图3所示的实施例中，R1的电阻值和R3的电阻值可以为1K欧，R2的电阻值可以为40K欧，R4的电阻值可以为100K欧。In the embodiment shown in FIG. 3 , the resistance values of R1 and R3 may be 1K ohms, the resistance value of R2 may be 40K ohms, and the resistance value of R4 may be 100K ohms.
在如图3所示的方波显示控制信号生成模块工作时，由单片机控制SEG1-H、SEG1-L输出高电平或低电平，当SEG1-H输出高电平、SEG1-L输出低电平时，第一显示区块被驱动，图3所示的方波显示控制信号生成模块具有斩波和放大的作用，其中，T2具有放大作用。图3所示的方波显示控制信号生成模块可以将直流电压信号转换成具有固定频率的方波信号，并能通过单片机控制两个显示频率控制信号输出端的输出频率，从而可以控制SEG1输出的方波显示控制信号的频率。When the square wave display control signal generation module shown in Figure 3 is working, SEG1-H and SEG1-L are controlled by the microcontroller to output high level or low level, when SEG1-H outputs high level and SEG1-L outputs low level level, the first display block is driven, and the square wave display control signal generation module shown in FIG. 3 has the functions of chopping and amplifying, wherein T2 has the function of amplifying. The square wave display control signal generation module shown in Figure 3 can convert the DC voltage signal into a square wave signal with a fixed frequency, and can control the output frequency of the two display frequency control signal output terminals through the single-chip microcomputer, so that the square wave output by SEG1 can be controlled. The wave shows the frequency of the control signal.
具体的，所述控制单元包括第一公共频率控制信号输出端和第二公共频率控制信号输出端；Specifically, the control unit includes a first common frequency control signal output terminal and a second common frequency control signal output terminal;
所述控制单元具体用于通过第一公共频率控制信号输出端输出第一公共频率控制信号，通过第二公共频率控制信号输出端输出第二公共频率控制信号；The control unit is specifically configured to output the first common frequency control signal through the first common frequency control signal output terminal, and output the second common frequency control signal through the second common frequency control signal output terminal;
所述方波公共电极电压信号生成模块包括：The square wave common electrode voltage signal generation module includes:
第五电阻；fifth resistor;
第三控制TFT，栅极通过所述第五电阻与第一公共频率控制信号输出端连接，第一极接地；The third control TFT, the gate is connected to the first common frequency control signal output terminal through the fifth resistor, and the first pole is grounded;
第六电阻；Sixth resistor;
第四控制TFT，栅极通过所述第六电阻与所述第一控制TFT的第二极连接，第一极与直流电压信号输出端连接，第二极与方波公共电极电压信号输出端连接；For the fourth control TFT, the gate is connected to the second pole of the first control TFT through the sixth resistor, the first pole is connected to the DC voltage signal output terminal, and the second pole is connected to the square wave common electrode voltage signal output terminal ;
第七电阻；Seventh resistance;
第二控制MOS管，栅极通过所述第七电阻通过所述第三电阻与第二公共频率控制信号输出端连接，第一极接地，第二极与所述方波公共电极电压信号输出端连接；以及，The second control MOS transistor, the gate is connected to the second common frequency control signal output terminal through the seventh resistor and the third resistor, the first pole is grounded, and the second pole is connected to the square wave common electrode voltage signal output terminal connection; and,
第八电阻，第一端与所述第二控制MOS管的栅极连接，第二端接地；An eighth resistor, the first end of which is connected to the gate of the second control MOS transistor, and the second end of which is grounded;
所述第三控制TFT为n型TFT，所述第四控制TFT为p型TFT，所述第二控制MOS管为NMOS晶体管；The third control TFT is an n-type TFT, the fourth control TFT is a p-type TFT, and the second control MOS transistor is an NMOS transistor;
当所述第一公共频率控制信号输出端输出高电平，所述第二公共频率控制信号输出端输出低电平时，所述方波公共电极电压信号输出端输出高电平；When the output terminal of the first common frequency control signal outputs a high level and the output terminal of the second common frequency control signal outputs a low level, the output terminal of the square wave common electrode voltage signal outputs a high level;
当所述第一公共频率控制信号输出端输出低电平，所述第二公共频率控制信号输出端输出高电平时，所述方波公共电极电压信号输出端输出低电平。When the output terminal of the first common frequency control signal outputs a low level and the output terminal of the second common frequency control signal outputs a high level, the output terminal of the square wave common electrode voltage signal outputs a low level.
例如，如图4所示，在本发明实施例所述的驱动电路中，所述方波公共电极电压控制信号生成模块的一具体实施例可以包括：For example, as shown in FIG. 4, in the driving circuit described in the embodiment of the present invention, a specific embodiment of the square wave common electrode voltage control signal generation module may include:
第五电阻R5；The fifth resistor R5;
标号为T3的第三控制TFT，栅极通过第五电阻R5与第一公共频率控制信号输出端COM-H连接，源极与地端RF_GND连接；The gate of the third control TFT labeled T3 is connected to the first common frequency control signal output terminal COM-H through the fifth resistor R5, and the source is connected to the ground terminal RF_GND;
第六电阻R6；The sixth resistor R6;
标号为T4的第四控制TFT，栅极通过第六电阻R6与标号为T1的所述第一控制TFT的第二极连接，源极与输出直流电压信号HV5的直流电压信号输出端连接，漏极与方波公共电极电压信号输出端COM连接；The gate of the fourth control TFT labeled T4 is connected to the second pole of the first control TFT labeled T1 through the sixth resistor R6, the source is connected to the DC voltage signal output end of the output DC voltage signal HV5, and the drain The pole is connected to the square wave common electrode voltage signal output terminal COM;
第七电阻R7；The seventh resistor R7;
第二控制MOS管M2，栅极通过所述第七电阻R7与第二公共频率控制信号输出端COM-L连接，源极与地端RF_GND连接，漏极与所述方波公共电极电压信号输出端COM连接；以及，The second control MOS transistor M2, the gate is connected to the second common frequency control signal output terminal COM-L through the seventh resistor R7, the source is connected to the ground terminal RF_GND, and the drain is connected to the square wave common electrode voltage signal output terminal COM connection; and,
第八电阻R8，第一端与所述第二控制MOS管M2的栅极连接，第二端与地端RF_GND；The eighth resistor R8, the first terminal is connected to the gate of the second control MOS transistor M2, and the second terminal is connected to the ground terminal RF_GND;
T3为n型TFT，T4为p型TFT，M2为NMOS管；T3 is an n-type TFT, T4 is a p-type TFT, and M2 is an NMOS tube;
当所述第一公共频率控制信号输出端COM-H输出高电平，所述第二公共频率控制信号输出端COM-L输出低电平时，所述方波公共电极电压信号输出端COM输出高电平；When the output terminal COM-H of the first common frequency control signal outputs a high level, and the output terminal COM-L of the second common frequency control signal outputs a low level, the output terminal COM of the square wave common electrode voltage signal outputs a high level level;
当所述第一公共频率控制信号输出端COM-H输出低电平，所述第二公共频率控制信号输出端COM-L输出高电平时，所述方波公共电极电压信号输出端COM输出低电平。When the output terminal COM-H of the first common frequency control signal outputs a low level, and the output terminal COM-L of the second common frequency control signal outputs a high level, the output terminal COM of the square wave common electrode voltage signal outputs a low level level.
在实际操作时，R5的电阻值和R7的电阻值可以为1K欧，R6的电阻值可以为20K欧，R8的电阻值可以为100K欧。In actual operation, the resistance values of R5 and R7 may be 1K ohms, the resistance value of R6 may be 20K ohms, and the resistance value of R8 may be 100K ohms.
在如图4所示的方波公共电极电压控制信号生成模块工作时，由单片机控制COM-H、COM-L输出高电平或低电平，当COM-H输出高电平、COM-L输出低电平时，COM可以输出稳定的基准电压，图4所示的方波公共电极电压控制信号生成模块具有斩波和稳压的作用。图4所示的方波公共电极电压控制信号生成模块以将直流电压信号转换成具有固定频率的方波信号，并能通过单片机控制两个公共频率控制信号输出端的输出频率，从而可以控制COM输出的方波显示控制信号的频率。When the square wave common electrode voltage control signal generation module shown in Figure 4 is working, the single-chip microcomputer controls COM-H and COM-L to output high level or low level, when COM-H outputs high level, COM-L When outputting a low level, COM can output a stable reference voltage, and the square wave common electrode voltage control signal generation module shown in Figure 4 has the functions of chopping and voltage stabilization. The square wave common electrode voltage control signal generation module shown in Figure 4 converts the DC voltage signal into a square wave signal with a fixed frequency, and can control the output frequency of the two common frequency control signal output terminals through the single-chip microcomputer, so that the COM output can be controlled The square wave shows the frequency of the control signal.
例如，如图5所示，本发明实施例所述的驱动电路在实际应用时可采用的输入输出模块可以包括12V直流电压输入端、地端GND、第一方波显示控制信号输出端SEG1、第二方波显示控制信号输出端SEG2连接、第三方波显示控制信号输出端SEG3、第四方波显示控制信号输出端SEG4、第五方波显示控制信号输出端SEG5连接、第六方波显示控制信号输出端SEG6、第七方波显示控制信号输出端SEG7、第八方波显示控制信号输出端SEG8、方波公共电极电压信号输出端COM、无线接口、有线接口和调试接口。For example, as shown in Figure 5, the input and output modules that can be used in the practical application of the drive circuit according to the embodiment of the present invention may include a 12V DC voltage input terminal, a ground terminal GND, a first square wave display control signal output terminal SEG1, The second square wave display control signal output port SEG2 is connected, the third wave display control signal output port SEG3, the fourth square wave display control signal output port SEG4, the fifth square wave display control signal output port SEG5 connection, the sixth square wave display Control signal output terminal SEG6, seventh square wave display control signal output terminal SEG7, eighth square wave display control signal output terminal SEG8, square wave common electrode voltage signal output terminal COM, wireless interface, wired interface and debugging interface.
本发明实施例所述的驱动电路还可以包括：The driving circuit described in the embodiment of the present invention may also include:
遥控单元，与所述控制单元无线或有线连接；a remote control unit, wirelessly or wiredly connected to the control unit;
所述遥控单元用于向所述控制单元发出遥控信号；The remote control unit is used to send a remote control signal to the control unit;
所述控制单元用于在所述遥控信号的控制下输出相应的频率控制信号。The control unit is used for outputting a corresponding frequency control signal under the control of the remote control signal.
所述遥控单元例如可以为红外遥控单元，所述红外遥控单元可以无线控制两种频率的相互切换，从而达到防窥与非防窥两种稳态的切换。The remote control unit can be, for example, an infrared remote control unit, which can wirelessly control the mutual switching of the two frequencies, so as to achieve the two stable switching between anti-peeping and non-peeping-proofing.
所述红外遥控单元可以发出四种操作：全屏顺序清空、全屏顺序磨砂、二分之一屏清空、二分之一屏磨砂；在实际操作时，支持全屏8个显示区块同时磨砂和清空，此时电流最大。The infrared remote control unit can issue four operations: full-screen sequential clearing, full-screen sequential frosting, half-screen clearing, and half-screen frosting; in actual operation, it supports simultaneous frosting and clearing of 8 display blocks on the full screen, At this time the current is at its maximum.
图6为本发明所述的驱动电路的一具体实施例的结构示意图。如图6所示，本发明实施例所述的驱动电路包括红外遥控单元、单片机(也即控制单元)和显示驱动单元，单片机由上位机控制，所述显示驱动单元与多稳态液晶显示面板连接，以控制所述多稳态液晶显示面板的防窥与非防窥两种稳态的自由切换，方便用于根据周边环境选择不同的状态。显示驱动单元包括升压电路以及DC/AC模块，多稳态液晶需要几十伏电压驱动，需通过低压瞬间升压实现，此外需要DC/AC模块将输入直流电压转换为固定频率的方波信号，从而实现与多稳态液晶显示面板的信号对接；用于控制的主要是单片机(也即控制单元)与红外遥控单元，可以实现高低频率的互相切换，其中单片机成本低，且对程序的兼容性较高，红外遥控操作方便简单。FIG. 6 is a schematic structural diagram of a specific embodiment of the driving circuit of the present invention. As shown in Figure 6, the drive circuit described in the embodiment of the present invention includes an infrared remote control unit, a single-chip microcomputer (that is, a control unit) and a display drive unit, the single-chip microcomputer is controlled by a host computer, and the display drive unit is connected with a multi-stable liquid crystal display panel. connected to control the free switching between the anti-peep and non-peep-proof two stable states of the multi-stable liquid crystal display panel, which is convenient for selecting different states according to the surrounding environment. The display drive unit includes a boost circuit and a DC/AC module. The multi-stable liquid crystal needs to be driven by tens of volts, which needs to be realized by a low-voltage instantaneous boost. In addition, the DC/AC module is required to convert the input DC voltage into a fixed-frequency square wave signal. , so as to realize the signal docking with the multi-stable liquid crystal display panel; the main ones used for control are the single-chip microcomputer (that is, the control unit) and the infrared remote control unit, which can realize the mutual switching between high and low frequencies, and the single-chip microcomputer is low in cost and compatible with the program High reliability, convenient and simple infrared remote control operation.
本发明实施例可以将近晶型多稳态液晶的散射态和透过态应用在显示屏的防窥效果上，有较高的商业及军用价值，并且本发明可针对不同的显示屏大小更改硬件驱动方案，兼容性较高，本发明采用的控制方案搭载单片机平台，可靠性较高，性能稳定，并且本发明的人机交互设备使用红外遥控实现，可靠性高，操作简单，性能稳定。The embodiment of the present invention can apply the scattering state and transmission state of the smectic multistable liquid crystal to the anti-peeping effect of the display screen, which has high commercial and military value, and the present invention can change the hardware for different display screen sizes The driving scheme has high compatibility, and the control scheme adopted in the present invention is equipped with a single-chip microcomputer platform, which has high reliability and stable performance, and the human-computer interaction device of the present invention is realized by infrared remote control, with high reliability, simple operation and stable performance.
图7为本发明实施例所述的驱动电路在工作时在两种稳态之间切换的流程图。如图7所示，首先，单片机(也即控制单元)控制第一显示频率控制信号输出端SEG-H、第二显示频率控制信号输出端SEG-L、第一公共频率控制信号输出端COM-H、第二公共频率控制信号输出端COM-L，以使得显示驱动单元输出50Hz方波显示控制信号和50Hz方波公共电极电压控制信号，以使得对应的显示区块显示清空状态；FIG. 7 is a flow chart of switching between two steady states when the driving circuit according to the embodiment of the present invention is working. As shown in Figure 7, first, the single-chip microcomputer (that is, the control unit) controls the first display frequency control signal output terminal SEG-H, the second display frequency control signal output terminal SEG-L, the first common frequency control signal output terminal COM- H, the second common frequency control signal output terminal COM-L, so that the display drive unit outputs a 50Hz square wave display control signal and a 50Hz square wave common electrode voltage control signal, so that the corresponding display block displays a clear state;
当红外遥控单元发出中断并切换至磨砂状态的信号时，切换为磨砂状态，单片机(也即控制单元)控制第一显示频率控制信号输出端SEG-H、第二显示频率控制信号输出端SEG-L、第一公共频率控制信号输出端COM-H、第二公共频率控制信号输出端COM-L，以使得显示驱动单元输出1KHz方波显示控制信号和1KHz方波公共电极电压控制信号，以使得对应的显示区块显示磨砂状态；When the infrared remote control unit sends a signal to interrupt and switch to the frosted state, it switches to the frosted state, and the single-chip microcomputer (that is, the control unit) controls the first display frequency control signal output terminal SEG-H, the second display frequency control signal output terminal SEG- L, the first common frequency control signal output terminal COM-H, the second common frequency control signal output terminal COM-L, so that the display drive unit outputs a 1KHz square wave display control signal and a 1KHz square wave common electrode voltage control signal, so that The corresponding display block shows the matte state;
当红外遥控信号发出中断并切换至清空状态的信号时，单片机(也即控制单元)控制第一显示频率控制信号输出端SEG-H、第二显示频率控制信号输出端SEG-L、第一公共频率控制信号输出端COM-H、第二公共频率控制信号输出端COM-L，以使得显示驱动单元输出50Hz方波显示控制信号和50Hz方波公共电极电压控制信号，以使得对应的显示区块显示清空状态。When the infrared remote control signal is interrupted and switched to the empty state signal, the single-chip microcomputer (that is, the control unit) controls the first display frequency control signal output terminal SEG-H, the second display frequency control signal output terminal SEG-L, the first common The frequency control signal output terminal COM-H, the second common frequency control signal output terminal COM-L, so that the display drive unit outputs a 50Hz square wave display control signal and a 50Hz square wave common electrode voltage control signal, so that the corresponding display block Displays the cleared status.
如图8所示，本发明实施例所述的驱动方法，应用于上述的驱动电路，所述驱动方法包括：As shown in FIG. 8, the driving method described in the embodiment of the present invention is applied to the above-mentioned driving circuit, and the driving method includes:
S1：方波信号生成单元生成并输出具有固定频率的方波显示控制信号和具有固定频率的方波公共电极电压信号；S1: The square wave signal generating unit generates and outputs a square wave display control signal with a fixed frequency and a square wave common electrode voltage signal with a fixed frequency;
S2：显示驱动单元将所述方波显示控制信号转换为相应的交流显示控制信号，将所述方波公共电极电压信号转换为相应的交流公共电极电压信号，并将该交流显示控制信号和该交流公共电极电压信号传送至多稳态液晶显示面板，以使得所述多稳态液晶显示面板根据该交流显示控制信号和该交流公共电极电压信号以处于相应的显示状态；S2: The display drive unit converts the square wave display control signal into a corresponding AC display control signal, converts the square wave common electrode voltage signal into a corresponding AC common electrode voltage signal, and combines the AC display control signal with the The AC common electrode voltage signal is transmitted to the multi-stable liquid crystal display panel, so that the multi-stable liquid crystal display panel is in a corresponding display state according to the AC display control signal and the AC common electrode voltage signal;
所述方波显示控制信号的频率与所述方波公共电极电压信号的频率相等；所述交流显示控制信号的幅值大于预定幅值。The frequency of the square wave display control signal is equal to the frequency of the square wave common electrode voltage signal; the amplitude of the AC display control signal is greater than a predetermined amplitude.
本发明实施例所述的显示装置，包括多稳态液晶显示面板，还包括上述的驱动电路。The display device described in the embodiment of the present invention includes a multi-stable liquid crystal display panel, and further includes the above-mentioned driving circuit.
以上所述是本发明的优选实施方式，应当指出，对于本技术领域的普通技术人员来说，在不脱离本发明所述原理的前提下，还可以作出若干改进和润饰，这些改进和润饰也应视为本发明的保护范围。The above description is a preferred embodiment of the present invention, it should be pointed out that for those of ordinary skill in the art, without departing from the principle of the present invention, some improvements and modifications can also be made, and these improvements and modifications can also be made. It should be regarded as the protection scope of the present invention.
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| CN201610815016.7ACN106205541B (en) | 2016-09-09 | 2016-09-09 | Driving circuit, driving method and display device |
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| CN102930841A (en)* | 2012-10-22 | 2013-02-13 | 沃谱瑞科技(北京)有限责任公司 | Pixel circuit of smectic state liquid crystal multistable electronic paper display |
| CN205334407U (en)* | 2015-12-03 | 2016-06-22 | 深圳磨石科技有限公司 | Touch display apparatus and electronic equipment |
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| US20050001797A1 (en)* | 2003-07-02 | 2005-01-06 | Miller Nick M. | Multi-configuration display driver |
| CN101710214A (en)* | 2009-12-23 | 2010-05-19 | 华映光电股份有限公司 | Multi-steady state liquid crystal display and driving way thereof |
| CN102930841A (en)* | 2012-10-22 | 2013-02-13 | 沃谱瑞科技(北京)有限责任公司 | Pixel circuit of smectic state liquid crystal multistable electronic paper display |
| CN205334407U (en)* | 2015-12-03 | 2016-06-22 | 深圳磨石科技有限公司 | Touch display apparatus and electronic equipment |
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| CN106205541B (en) | 2018-10-09 |
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