WO2020062586A1

WO2020062586A1 - Driving circuit and method

Info

Publication number: WO2020062586A1
Application number: PCT/CN2018/119667
Authority: WO
Inventors: 单剑锋
Original assignee: 惠科股份有限公司
Priority date: 2018-09-30
Filing date: 2018-12-07
Publication date: 2020-04-02
Also published as: CN109147706A

Abstract

A driving circuit configured to drive a liquid crystal display device. The liquid crystal display device comprises a first pixel electrode, a second pixel electrode, and a third pixel electrode that respectively allow light of three colors, i.e., red, green, and blue, to pass through. The driving circuit comprises a control circuit 100, a first group of gamma correction circuits 200, a second group of gamma correction circuits 300, a third group of gamma correction circuits 400, and a plurality of data driving circuits 500.

Description

Driving circuit and method

This application claims the priority of a Chinese patent application filed on September 30, 2018 with the Chinese Patent Office under the application number 201811156749X and the application name is "Drive Circuit and Method, Display Panel and Display Device", the entire contents of which are incorporated by reference In this application.

Technical field

The present application relates to a driving circuit and method.

Background technique

The statements herein merely provide background information related to the present application and do not necessarily constitute prior art.

With the rapid development of multimedia technology, display devices have also made rapid progress, and user requirements have become higher and higher. Therefore, LCD panels have increasingly higher requirements for the consistency of color accuracy of each gray level, especially each gray level. I hope that the white point is the same, so that consumers can truly enjoy the realistic color performance when watching movies.

However, in the color film of the exemplary display, the thickness of the blue film is the largest, followed by the thickness of the green film, and again the thickness of the red film, and the liquid crystal cell gap is defined / monitored / measured by the thickness of the green film, This definition / monitoring / measurement of the liquid crystal layer gap is different from the actual liquid crystal layer gap, which in turn affects Δnd and affects the transmittance of the liquid crystal layer, which ultimately results in voltage penetration of red (R) / green (G) / blue (B). The transmittance curve (VT) is different (see Figure 1, where Tr-R is the voltage red light transmittance curve, Tr-G is the voltage green light transmittance curve, and Tr-B is the voltage blue light transmittance curve), The problem of making the white points of each gray scale inconsistent.

Summary of the Invention

According to various embodiments disclosed in the present application, a driving circuit and method are provided.

A driving circuit configured to drive a liquid crystal display device, the liquid crystal display device including a first pixel electrode, a second pixel electrode, and a third pixel electrode that respectively allow light of three colors of red, green, and blue to pass through, The driving circuit includes:

A control circuit configured to generate a data signal and a control signal according to the input signal;

A first group of gamma correction circuits configured to provide a first gamma voltage;

A second group of gamma correction circuits configured to provide a second gamma voltage;

A third group of gamma correction circuits configured to provide a third gamma voltage;

A plurality of data driving circuits, which are respectively connected to the control circuit, the first group of gamma correction circuits, the second group of gamma correction circuits, and the third group of gamma correction circuits, and are set as The driving mode is turned on according to the data signal and the control signal, and a first voltage is output to the first pixel electrode using the first gamma voltage as a reference point, and a first Two voltages, using the third gamma voltage as a reference point to output a third voltage to the third pixel electrode, so that the voltage corresponding to the first pixel electrode, the second pixel electrode, and the third pixel electrode is a red light transmittance curve, voltage The green light transmittance curve and the voltage blue light transmittance curve overlap.

In one embodiment, the first pixel electrode, the second pixel electrode, and the third pixel electrode are respectively connected to a gate line and a data line.

In one embodiment, a plurality of the data driving circuits are connected to the corresponding first pixel electrode, the second pixel electrode, and the third pixel electrode through the data line.

In one embodiment, the driving circuit further includes:

A plurality of scan driving circuits are connected to the control circuit, and the scan driving circuits are correspondingly connected to the gate lines connected to the pixel electrodes, and are configured to drive the corresponding gate lines according to the control signal and the clock signal.

In one embodiment, the driving circuit further includes:

The power circuit is configured to be connected to a voltage, and the voltage is converted into a voltage required by the system to be supplied to each circuit.

In one embodiment, the power circuit includes a power conversion chip.

In one embodiment, the control circuit is further configured to output a shutdown signal to the data drive circuit when the voltage is lower than a preset voltage value; the data drive circuit is further configured to output the shutdown signal according to the shutdown signal. A fourth voltage is output to the first pixel electrode, the second pixel electrode, and the third pixel electrode to display the same grayscale picture.

In one embodiment, a plurality of data driving circuits turn on a driving mode according to the data signal and the control signal in sequence.

In one embodiment, the control circuit is a timing control chip.

In one embodiment, the first group of gamma correction circuits is a red group of gamma correction circuits, the second group of gamma correction circuits is a green group of gamma correction circuits, and the third group of gamma correction circuits Gamma correction circuit for the blue group.

In one embodiment, the first gamma voltage, the second gamma voltage, and the third gamma voltage are set by calibration.

A plurality of data driving circuits, which are respectively connected to the control circuit, the first group of gamma correction circuits, the second group of gamma correction circuits, and the third group of gamma correction circuits, and are set as The driving mode is turned on according to the data signal and the control signal, and a first voltage is output to the first pixel electrode using the first gamma voltage as a reference point, and a first voltage is output to the second pixel electrode using the second gamma voltage as a reference point. Two voltages, using the third gamma voltage as a reference point to output a third voltage to the third pixel electrode, so that the voltage corresponding to the first pixel electrode, the second pixel electrode, and the third pixel electrode is a red light transmittance curve, voltage Green light transmittance curve and voltage blue light transmittance curve overlap;

A plurality of scan driving circuits, the scan driving circuits are connected to the control circuit, and the scan driving circuits are correspondingly connected to gate lines connected to the pixel electrodes, and are configured to drive corresponding gates according to the control signals and clock signals line;

A power supply circuit configured to be connected to a voltage and converting the voltage into different voltages to supply to various circuits;

Wherein, a plurality of data driving circuits turn on a driving mode according to the data signal and the control signal in sequence;

The control circuit is a timing control chip;

The first group of gamma correction circuits is a red group of gamma correction circuits, the second group of gamma correction circuits is a green group of gamma correction circuits, and the third group of gamma correction circuits is a blue group of gamma correction circuits. ;

The first gamma voltage, the second gamma voltage, and the third gamma voltage are set by calibration.

A driving method based on the driving circuit described above includes:

Generating data signals and control signals according to the input signals;

Providing a first gamma voltage, a second gamma voltage, and a third gamma voltage;

The driving mode is turned on according to the data signal and the control signal, and a first voltage is output to the first pixel electrode using the first gamma voltage as a reference point, and a first voltage is output to the second pixel electrode using the second gamma voltage as a reference point. Two voltages, using the third gamma voltage as a reference point to output a third voltage to the third pixel electrode, so that the voltage corresponding to the first pixel electrode, the second pixel electrode, and the third pixel electrode is a red light transmittance curve, voltage The green light transmittance curve and the voltage blue light transmittance curve overlap.

In one embodiment, the driving method further includes:

The voltage is connected, and the voltage is converted into a voltage required by the system for supply.

In one embodiment, the driving method further includes:

Generating a shutdown signal when the voltage is lower than a preset voltage value;

A fourth voltage is output to the first pixel electrode, the second pixel electrode, and the third pixel electrode according to the shutdown signal to display the same grayscale picture.

In one embodiment, the driving method further includes:

Setting and calibration of the first gamma voltage, the second gamma voltage, and the third gamma voltage.

In one embodiment, the driving method further includes:

The corresponding gate line is driven according to a control signal and a clock signal.

Details of one or more embodiments of the present application are set forth in the accompanying drawings and description below. Other features and advantages of the application will become apparent from the description, the drawings, and the claims.

BRIEF DESCRIPTION OF THE DRAWINGS

In order to explain the technical solutions in the embodiments of the present application more clearly, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present application. Those of ordinary skill in the art can obtain other drawings according to the drawings without paying creative labor.

FIG. 1 is a graph of voltage transmittance of R / G / B;

2 is a structural diagram of a driving circuit in an embodiment;

FIG. 3 is a graph of voltage transmittance of another R / G / B;

4 is a structural diagram of a driving circuit in another embodiment;

FIG. 5 is a flowchart of a method corresponding to the driving circuit of FIG. 2 in an embodiment.

detailed description

In order to make the technical solution and advantages of the present application more clear and clear, the present application is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the application, and are not intended to limit the application.

Referring to FIG. 2, FIG. 2 is a structural diagram of a driving circuit in an embodiment.

In this embodiment, the driving circuit is configured to drive a liquid crystal display device. The liquid crystal display device includes a first pixel electrode, a second pixel electrode, and a third pixel electrode that allow light of three colors of red, green, and blue to pass through, respectively. The driving circuit includes a control circuit 100, a first group of gamma correction circuits 200, a second group of gamma correction circuits 300, a third group of gamma correction circuits 400, and a plurality of data driving circuits 500. Each pixel electrode is correspondingly connected with a gate line and a data line.

The control circuit 100 is configured to generate a data signal and a control signal based on the input signal.

The first group of gamma correction circuits 200 is configured to provide a first gamma voltage.

The second group of gamma correction circuits 300 is configured to provide a second gamma voltage.

The third group of gamma correction circuits 400 is configured to provide a third gamma voltage.

A plurality of data driving circuits 500 are connected to the control circuit 100, the first group of gamma correction circuits 200, the second group of gamma correction circuits 300, and the third group of gamma correction circuits 400, respectively, and are configured to be based on the data signals and The control signal turns on the driving mode, and outputs a first voltage to the first pixel electrode using the first gamma voltage as a reference point, and outputs a second voltage to the second pixel electrode using the second gamma voltage as a reference point, and uses a third gamma The voltage is used as a reference point to output a third voltage to the third pixel electrode, so that the voltage red light transmittance curve, voltage green light transmittance curve, and voltage respectively correspond to the first pixel electrode, the second pixel electrode, and the third pixel electrode. The blue light transmittance curves overlap.

In this embodiment, the control circuit 100 accesses the input signals of the system side, and outputs data signals and control signals to the plurality of data driving circuits 500 according to the input signals, and is configured to control the plurality of data driving circuits 500 to open corresponding to each data driving circuit 500. Driving mode of the first pixel electrode, the second pixel electrode, and the third pixel electrode. Specifically, the control circuit 100 is a timing control chip. Therefore, the control circuit 100 can control the driving modes of the plurality of data driving circuits 500 to enable the subsequent display of the liquid crystal display device image.

In this embodiment, the first group of gamma correction circuits 200 is a red (R) group of gamma correction circuits, and a first gamma voltage is provided to each data driving circuit 500 so that the first gamma voltage is used as each data driving circuit. 500 is the reference point for outputting the gamma voltage value; the second group of gamma correction circuits 300 is a green (G) group of gamma correction circuits, and provides the second gamma voltage to each data driving circuit 500 so that the second gamma voltage is used as Each data driving circuit 500 outputs a reference point of a gamma voltage value; the third group of gamma correction circuits 400 is a blue (B) group of gamma correction circuits, and provides a third gamma voltage so that the third gamma voltage is used as each data The driving circuit 500 outputs a reference point of a gamma voltage value.

The first gamma voltage, the second gamma voltage, and the third gamma voltage are set by calibration. In one of the embodiments, it is determined by adjusting a voltage transmittance curve. When the first voltage, the second voltage, and the third voltage output by using the first gamma voltage, the second gamma voltage, and the third gamma voltage as reference points, respectively, When the third voltage can make the voltage red light transmittance curve, voltage green light transmittance curve, and voltage blue light transmittance curve corresponding to the first pixel electrode, the second pixel electrode, and the third pixel electrode overlap, the first voltage is determined. Voltage values of a first gamma voltage, a second gamma voltage, and a third gamma voltage. After the voltage values of the first gamma voltage, the second gamma voltage, and the third gamma voltage are determined, the first voltage, the second gamma voltage, and the second gamma voltage corresponding to the first gamma voltage, the second gamma voltage, and the third gamma voltage are subsequently determined. The voltage and the third voltage can make the voltage red light transmittance curve, voltage green light transmittance curve, and voltage blue light transmittance curve corresponding to the first pixel electrode, the second pixel electrode, and the third pixel electrode overlap, respectively. (See Figure 3), which solves the difference between the gap between the liquid crystal layer and the actual gap between the liquid crystal layer, and then affects Δnd, which affects the transmittance of the liquid crystal layer. Finally, the VT of R / G / B is different, which makes the white of each gray level different. Point is inconsistent.

In this embodiment, a plurality of data driving circuits 500 are respectively connected to the control circuit 100, the first group of gamma correction circuits 200, the second group of gamma correction circuits 300, and the third group of gamma correction circuits 400, and the plurality of data drive circuits 500 also connects the corresponding first pixel electrode, second pixel electrode, and third pixel electrode through a data line. The plurality of data driving circuits 500 start a driving mode under the control of the control circuit 100, and apply the grayscale voltage to the corresponding liquid crystal display device with the first gamma voltage, the second gamma voltage, and the third gamma voltage as reference points. The first pixel electrode, the second pixel electrode, and the third pixel electrode that allow light of three colors of red, green, and blue to pass through respectively, so that the liquid crystal display device controls the liquid crystal molecules to deflect according to the received gray-scale voltage, thereby allowing Different colors of light are transmitted to display the picture.

Specifically, the plurality of data driving circuits 500 turn on the driving mode according to the data signal and the control signal, and output a first voltage to the first pixel electrode using the first gamma voltage as a reference point, and output the first voltage to the first pixel electrode using the second gamma voltage as a reference point. The two pixel electrodes output a second voltage, and the third voltage is output to the third pixel electrode with the third gamma voltage as a reference point, so that the liquid crystal molecules of the liquid crystal display device are deflected to display the image, and the white points of each gray level of the displayed image are consistent. , With realistic color performance.

In one embodiment, a plurality of data driving circuits turn on the driving mode according to the data signal and the control signal in sequence, that is, the turning on of the plurality of data driving circuit driving modes is sequential. After the first data driving circuit driving mode is turned on, the driving After the corresponding pixel electrode is turned on, the next data driving circuit turns on the driving mode to drive the corresponding pixel electrode until all the data driving circuits finish driving.

The driving circuit provided in this embodiment includes a control circuit 100, a first group of gamma correction circuits 200, a second group of gamma correction circuits 300, a third group of gamma correction circuits 400, and a plurality of data driving circuits 500. 100 generates a data signal and a control signal according to the input signal. The first group of gamma correction circuits 200, the second group of gamma correction circuits 300, and the third group of gamma correction circuits 400 provide reference points for the output voltage values of the data driving circuit 500, respectively. To make the data driving circuit 500 apply the grayscale voltage to the corresponding first pixel electrode, second pixel electrode, and third pixel electrode with the first gamma voltage, the second gamma voltage, and the third gamma voltage as reference points. , So that the liquid crystal display device displays an image, and the voltage red light transmittance curve, the voltage green light transmittance curve, and the voltage blue light transmittance curve are overlapped and consistent, so that the white points of each gray level of the display image are balanced.

Referring to FIG. 4, FIG. 4 is a structural diagram of a driving circuit in another embodiment.

In this embodiment, the driving circuit is configured to drive a liquid crystal display device. The liquid crystal display device includes a first pixel electrode, a second pixel electrode, and a third pixel electrode that allow light of three colors of red, green, and blue to pass through, respectively. The driving circuit includes a control circuit 100, a first group of gamma correction circuits 200, a second group of gamma correction circuits 300, a third group of gamma correction circuits 400, a plurality of data driving circuits 500, a plurality of scan driving circuits 600, and Power circuit 700.

In this embodiment, related descriptions of the control circuit 100, the first group of gamma correction circuits 200, the second group of gamma correction circuits 300, the third group of gamma correction circuits 400, and the plurality of data driving circuits 500 refer to the previous implementation For example, we will not repeat them here.

In this embodiment, a plurality of scan driving circuits 600 are connected to the control circuit 100, and the scan driving circuit 600 is correspondingly connected to a gate line connected to a pixel electrode, and is configured to drive the corresponding signals according to a control signal and a clock signal under the control of the control circuit 100. TFT (Thin Film Transistor) of the pixel electrode connected to each gate line in turn.

In this embodiment, the power supply circuit 700 is connected to the control circuit 100, the first group of gamma correction circuits 200, the second group of gamma correction circuits 300, the third group of gamma correction circuits 400, and a plurality of data driving circuits 500, and more. Each scan driving circuit 600 is set to be connected to a voltage provided by an external power source, and converts the voltage into a voltage required by each circuit to be supplied to each circuit. The power supply circuit 700 may include a power conversion chip, such as a DC / DC conversion chip, which converts the connected voltage into a voltage required by each circuit. The required voltage is provided to each circuit through the power supply circuit 700 to ensure the normal operation of each circuit. In one embodiment, the control circuit 100 is further configured to output a shutdown signal to the data driving circuit 500 when the required voltage is lower than a preset voltage value; the data driving circuit 500 is further configured to output a fourth voltage to the first according to the shutdown signal. The pixel electrode, the second pixel electrode, and the third pixel electrode display the same grayscale picture, thereby avoiding the fact that a large amount of residual charge in the panel cannot be released in time when the external power is turned off, resulting in a residual image on the panel after shutdown. problem. The preset voltage value and the fourth voltage may be limited according to actual applications, and are not limited herein.

It should be noted that each of the above-mentioned driving circuits can be implemented in whole or in part by software, hardware, and a combination thereof. Each of the above circuits may be embedded in a processor in a hardware form or independent of a processor in a computer device, or may be stored in a memory of a computer device in a software form, so that the processor can call and execute operations corresponding to the above circuits.

The driving circuit provided in this embodiment includes a control circuit 100, a first group of gamma correction circuits 200, a second group of gamma correction circuits 300, a third group of gamma correction circuits 400, a plurality of data driving circuits 500, and a plurality of scans. The driving circuit 600 and the power supply circuit 700 supply power to the circuits through the power supply circuit 700. The control circuit 100 generates data signals and control signals according to the input signals. The first group of gamma correction circuits 200, the second group of gamma correction circuits 300, and the third group The group gamma correction circuit 400 provides a reference point for the output voltage value for the data driving circuit 500, so that the data driving circuit 500 uses the first gamma voltage, the second gamma voltage, and the third gamma voltage as reference points to respectively gray out A step voltage is applied to the corresponding first pixel electrode, the second pixel electrode, and the third pixel electrode, and the scan driving circuit 600 drives the corresponding connection with the first pixel electrode, the second pixel electrode, and the third pixel electrode according to a control signal and a clock signal. Gate line, so that the liquid crystal display device displays an image, and the voltage red light transmittance curve, voltage green light transmittance curve and voltage blue light Through consistent curves overlap, whereby the display image of each gray balance consistent white point.

An embodiment of the present invention provides a display panel. The display panel includes a liquid crystal display circuit. The liquid crystal display circuit includes a first pixel electrode, a second pixel electrode, and a third pixel that respectively allow light of three colors of red, green, and blue to pass through. The electrode further includes a driving circuit as described in the above embodiment. The display panel has the consistency of the color accuracy of each gray level, especially the white point balance of each gray level is consistent, and has a realistic color performance.

This embodiment provides a display device including the display panel of the previous embodiment. The display image of the display device has the consistency of the color accuracy of each gray level, especially the white point balance of each gray level, so that consumers can truly enjoy realistic color performance when watching movies.

Referring to FIG. 5, FIG. 5 is a flowchart of a method corresponding to the driving circuit of FIG. 2 according to an embodiment.

In this embodiment, the driving method includes steps S101, S102, and S103. Details are as follows:

In step S101, a data signal and a control signal are generated based on the input signal.

In this embodiment, step S101 is to control the subsequent steps by accessing an input signal of the system side and outputting a data signal and a control signal according to the input signal.

Specifically, before step S101, the method further includes accessing a voltage provided by an external power source, and converting the voltage into a voltage required by the system for supply. In one embodiment, before step S101, the method further includes generating a shutdown signal when the required voltage is lower than a preset voltage value; and outputting a fourth voltage to the first pixel electrode, the second pixel electrode, and the third pixel electrode according to the shutdown signal. The same grayscale screen is displayed to avoid the problem of residual images on the panel after the power is turned off due to the large amount of residual charges in the panel that cannot be released in time when the external power is turned off. The preset voltage value and the fourth voltage may be limited according to actual applications, and are not limited herein.

In step S102, a first gamma voltage, a second gamma voltage, and a third gamma voltage are provided.

In this embodiment, the first gamma voltage, the second gamma voltage, and the third gamma voltage are reference points for the grayscale voltage output to the pixel electrode in the subsequent steps. The horse voltage and the third gamma voltage determine the grayscale voltage value.

In one embodiment, before or after step S102, the setting and calibration of the first gamma voltage, the second gamma voltage, and the third gamma voltage are further included. In one of the embodiments, it is determined by adjusting a voltage transmittance curve. When the first voltage, the second voltage, and the third voltage output by using the first gamma voltage, the second gamma voltage, and the third gamma voltage as reference points, respectively, When the third voltage can make the voltage red light transmittance curve, voltage green light transmittance curve, and voltage blue light transmittance curve corresponding to the first pixel electrode, the second pixel electrode, and the third pixel electrode overlap, the first voltage is determined. Voltage values of a first gamma voltage, a second gamma voltage, and a third gamma voltage. After the voltage values of the first gamma voltage, the second gamma voltage, and the third gamma voltage are determined, the first voltage, the second gamma voltage, and the second gamma voltage corresponding to the first gamma voltage, the second gamma voltage, and the third gamma voltage are subsequently determined. The voltage and the third voltage can make the voltage red light transmittance curve, voltage green light transmittance curve, and voltage blue light transmittance curve corresponding to the first pixel electrode, the second pixel electrode, and the third pixel electrode overlap, respectively. , So that the white point balance of each gray level is consistent.

In step S103, the driving mode is turned on according to the data signal and the control signal, and a first voltage is output to the first pixel electrode using the first gamma voltage as a reference point, and a second pixel electrode is output using the second gamma voltage as a reference point. The second voltage, using the third gamma voltage as a reference point to output a third voltage to the third pixel electrode, so that the voltage red light transmittance curves corresponding to the voltages of the first pixel electrode, the second pixel electrode, and the third pixel electrode, The voltage green light transmittance curve and the voltage blue light transmittance curve overlap with each other.

In this embodiment, step S103 applies a grayscale voltage to the liquid crystal display device based on the data signal and the control signal with the first gamma voltage, the second gamma voltage, and the third gamma voltage as reference points to allow red, green, and The three pixel colors of blue are transmitted through the first pixel electrode, the second pixel electrode, and the third pixel electrode, so that the liquid crystal display device controls the liquid crystal molecules to deflect according to the received gray-scale voltage, thereby allowing different colors of light to pass through. To display the screen. Specifically, the driving mode is turned on according to the data signal and the control signal, and a first voltage is output to the first pixel electrode using the first gamma voltage as a reference point, and a second voltage is output to the second pixel electrode using the second gamma voltage as a reference point. The third voltage is output to the third pixel electrode by using the third gamma voltage as a reference point, so that the liquid crystal molecules of the liquid crystal display device are deflected to display the image, and the white points of each gray scale of the display image are consistent and have realistic color performance.

Specifically, before step S103, the method further includes driving a corresponding gate line according to a control signal and a clock signal. Each gate line is connected to the TFT of the pixel electrode, and the corresponding gate line is driven to make the TFT connected to the pixel electrode to the gate line conductive.

It should be understood that although the steps in the flowchart of the above embodiment are sequentially displayed in accordance with the instructions of the arrows, these steps are not necessarily performed sequentially in the order indicated by the arrows. Unless explicitly stated in this document, the execution of these steps is not strictly limited, and these steps can be performed in other orders.

The driving method provided in this embodiment generates a data signal and a control signal according to an input signal, and provides a first gamma voltage, a second gamma voltage, and a third gamma voltage as reference points, respectively, and applies a grayscale voltage to the liquid crystal. The first pixel electrode, the second pixel electrode, and the third pixel electrode on the display device that allow light of three colors of red, green, and blue to pass through, respectively, so that the liquid crystal display device displays an image, and the voltage red light transmittance curve, The voltage green light transmittance curve and the voltage blue light transmittance curve are overlapped and consistent, so that the white points of each gray scale of the display image are uniformly balanced, and the display image has realistic color performance.

The technical features of the embodiments described above can be arbitrarily combined. In order to simplify the description, all possible combinations of the technical features in the above embodiments have not been described. However, as long as there is no contradiction in the combination of these technical features, It should be considered as the scope described in this specification.

The above-mentioned embodiments only express several implementation manners of the present application, and their descriptions are more specific and detailed, but they cannot be understood as limiting the scope of patents of the present application. It should be noted that, for those of ordinary skill in the art, without departing from the concept of the present application, several modifications and improvements can be made, and these all belong to the protection scope of the present application. Therefore, the protection scope of this application patent shall be subject to the appended claims.

Claims

A driving circuit configured to drive a liquid crystal display device, the liquid crystal display device including a first pixel electrode, a second pixel electrode, and a third pixel electrode that respectively allow light of three colors of red, green, and blue to pass through, The driving circuit includes:

A control circuit configured to generate a data signal and a control signal according to the input signal;

A first group of gamma correction circuits configured to provide a first gamma voltage;

A second group of gamma correction circuits configured to provide a second gamma voltage;

A third group of gamma correction circuits configured to provide a third gamma voltage;

A plurality of data driving circuits, which are respectively connected to the control circuit, the first group of gamma correction circuits, the second group of gamma correction circuits, and the third group of gamma correction circuits, and are set as The driving mode is turned on according to the data signal and the control signal, and a first voltage is output to the first pixel electrode using the first gamma voltage as a reference point, and a first voltage is output to the second pixel electrode using the second gamma voltage as a reference point. Two voltages, using the third gamma voltage as a reference point to output a third voltage to the third pixel electrode, so that the voltage corresponding to the first pixel electrode, the second pixel electrode, and the third pixel electrode is a red light transmittance curve, voltage The green light transmittance curve and the voltage blue light transmittance curve overlap.
The driving circuit according to claim 1, wherein the first pixel electrode, the second pixel electrode, and the third pixel electrode are respectively connected to a gate line and a data line.
The driving circuit according to claim 2, wherein a plurality of the data driving circuits are connected to the corresponding first pixel electrode, the second pixel electrode, and the third pixel electrode through the data line.
The driving circuit according to claim 2, wherein the driving circuit further comprises:

A plurality of scan driving circuits are connected to the control circuit, and the scan driving circuits are correspondingly connected to the gate lines connected to the pixel electrodes, and are configured to drive the corresponding gate lines according to the control signal and the clock signal.
The driving circuit according to claim 1, wherein the driving circuit further comprises:

The power circuit is configured to be connected to a voltage, and the voltage is converted into a voltage required by the system to be supplied to each circuit.
The driving circuit according to claim 5, wherein the power circuit includes a power conversion chip.
The driving circuit according to claim 5, wherein the control circuit is further configured to output a shutdown signal to the data driving circuit when the voltage is lower than a preset voltage value; and the data driving circuit is further configured to A fourth voltage is output to the first pixel electrode, the second pixel electrode, and the third pixel electrode according to the shutdown signal to display the same grayscale picture.
The driving circuit according to claim 1, wherein a plurality of data driving circuits turn on a driving mode according to the data signal and the control signal in order.
The driving circuit according to claim 1, wherein the control circuit is a timing control chip.
The driving circuit according to claim 1, wherein the first group of gamma correction circuits is a red group of gamma correction circuits, the second group of gamma correction circuits is a green group of gamma correction circuits, and the third group The group gamma correction circuit is a blue group gamma correction circuit.
The driving circuit according to claim 1, wherein the first gamma voltage, the second gamma voltage, and the third gamma voltage are set by calibration.
A driving circuit configured to drive a liquid crystal display device, the liquid crystal display device including a first pixel electrode, a second pixel electrode, and a third pixel electrode that respectively allow light of three colors of red, green, and blue to pass through, The driving circuit includes:

A control circuit configured to generate a data signal and a control signal according to the input signal;

A first group of gamma correction circuits configured to provide a first gamma voltage;

A second group of gamma correction circuits configured to provide a second gamma voltage;

A third group of gamma correction circuits configured to provide a third gamma voltage;

A plurality of data driving circuits, which are respectively connected to the control circuit, the first group of gamma correction circuits, the second group of gamma correction circuits, and the third group of gamma correction circuits, and are set as The driving mode is turned on according to the data signal and the control signal, and a first voltage is output to the first pixel electrode using the first gamma voltage as a reference point, and a first voltage is output to the second pixel electrode using the second gamma voltage as a reference point. Two voltages, using the third gamma voltage as a reference point to output a third voltage to the third pixel electrode, so that the voltage corresponding to the first pixel electrode, the second pixel electrode, and the third pixel electrode is a red light transmittance curve, voltage Green light transmittance curve and voltage blue light transmittance curve overlap;

A plurality of scan driving circuits, the scan driving circuits are connected to the control circuit, and the scan driving circuits are correspondingly connected to gate lines connected to the pixel electrodes, and are configured to drive corresponding gates according to the control signals and clock signals line;

A power supply circuit configured to be connected to a voltage and converting the voltage into different voltages to supply to various circuits;

The data driving circuit is connected to the corresponding first pixel electrode, second pixel electrode, and third pixel electrode through a data line, and a plurality of data driving circuits turn on a driving mode according to the data signal and the control signal in sequence;

The control circuit is a timing control chip;

The first group of gamma correction circuits is a red group of gamma correction circuits, the second group of gamma correction circuits is a green group of gamma correction circuits, and the third group of gamma correction circuits is a blue group of gamma correction circuits. ;

The first gamma voltage, the second gamma voltage, and the third gamma voltage are set by calibration.
A driving method based on the driving circuit according to claim 1, comprising:

Generating data signals and control signals according to the input signals;

Providing a first gamma voltage, a second gamma voltage, and a third gamma voltage;

The driving mode is turned on according to the data signal and the control signal, and a first voltage is output to the first pixel electrode using the first gamma voltage as a reference point, and a first voltage is output to the second pixel electrode using the second gamma voltage as a reference point. Two voltages, using the third gamma voltage as a reference point to output a third voltage to the third pixel electrode, so that the voltage corresponding to the first pixel electrode, the second pixel electrode, and the third pixel electrode is a red light transmittance curve, voltage The green light transmittance curve and the voltage blue light transmittance curve overlap.
The driving method according to claim 13, wherein the driving method further comprises:

The voltage is connected, and the voltage is converted into a voltage required by the system for supply.
The driving method according to claim 14, wherein the driving method further comprises:

Generating a shutdown signal when the voltage is lower than a preset voltage value;

A fourth voltage is output to the first pixel electrode, the second pixel electrode, and the third pixel electrode according to the shutdown signal to display the same grayscale picture.
The driving method according to claim 13, wherein the driving method further comprises:

Setting and calibration of the first gamma voltage, the second gamma voltage, and the third gamma voltage.
The driving method according to claim 13, wherein the driving method further comprises:

The corresponding gate line is driven according to a control signal and a clock signal.