WO2020134997A1

WO2020134997A1 - Driving method for display panel, display device and storage medium

Info

Publication number: WO2020134997A1
Application number: PCT/CN2019/123961
Authority: WO
Inventors: 吴川
Original assignee: 惠科股份有限公司
Priority date: 2018-12-25
Filing date: 2019-12-09
Publication date: 2020-07-02
Also published as: CN109509455A

Abstract

A driving method for a display panel, a display device and a storage medium. The driving method for a display panel comprises: acquiring a charge time duty cycle of subpixel units in an odd column (S10); determining, according to the charge time duty cycle of the subpixel units in the odd column, a target charge time duty cycle for subpixel units in an even column, wherein the target charge time duty cycle is less than the charge time duty cycle of the subpixel units in the odd column (S20); and adjusting a charge time duty cycle of the subpixel units in the even column to the target charge time duty cycle (S30).

Description

Driving method of display panel, display device and storage medium The

Related application

This application requires the priority of the Chinese patent application filed on December 25, 2018 with the application number 201811589517.3 and titled "Driving Method of Display Panel, Display Device, and Storage Media", the entire content of which is hereby incorporated by reference.

Technical field

The present application relates to the field of liquid crystal technology, and in particular, to a driving method of a display panel, a display device, and a computer-readable storage medium.

Background technique

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

At present, liquid crystal display devices should be widely installed in various display fields. Semi-source driving technology is currently a common production scheme in the LCD panel industry. This scheme is to increase the number of scanning lines and make a single data line correspond to two adjacent columns. The pixel unit saves the data driving circuit, thereby reducing the cost.

However, in a half-source-driven pixel array, one data line drives two columns of sub-pixel units, destroying the symmetry of the pixels, and the number of sub-pixel units connected to the scan line is reduced, and the scan pulse time allocated to the scan line is shortened. The charging time of each sub-pixel unit is reduced. Therefore, the signal delay effect of the data line and the scan line is often more obvious, resulting in the generation of bright and dark lines, and thus has the disadvantage of uneven brightness of the display screen.

Summary of the invention

The main purpose of the present application is to provide a driving method of a display panel, a display device, and a computer-readable storage medium, which improve the brightness uniformity of the display screen of the display panel.

In order to achieve the above object, the present application provides a driving method of a display panel. The driving method of the display panel includes the following steps:

Obtain the charging time duty cycle of odd-numbered sub-pixel units;

Determining a target charging time duty cycle of the even-numbered sub-pixel units according to the charging time duty cycle of the odd-numbered sub-pixel units, the target charging time duty cycle being less than the charging time duty cycle of the odd-numbered sub-pixel units; and,

Adjusting the charging time duty cycle of the even-numbered column sub-pixel units to the target charging time duty cycle.

Optionally, the duty cycle of the odd-numbered sub-pixel units is 10% to 90%, and the duty cycle of the even-numbered sub-pixel units is 10% to 90%.

Optionally, the driving method of the display panel further includes:

Obtain the effective charging time of odd-numbered sub-pixel units;

Determining the target charging time of the even-numbered sub-pixel units according to the effective charging time of the odd-numbered sub-pixel units, the target charging time being less than the effective charging time of the odd-numbered sub-pixel units; and,

Adjusting the effective charging time of the even column sub-pixel units to the target charging time.

Optionally, the driving method of the display panel further includes:

Acquiring the next odd-numbered column sub-pixel unit to be charged; and,

Controlling the next odd column sub-pixel unit to be charged to perform a charging operation.

Optionally, the charging time duty cycle refers to the proportion of the effective charging time relative to the total charging time in one pulse cycle.

Optionally, the step of obtaining the charging time duty ratio of the odd-numbered sub-pixel units includes:

Acquiring the effective charging time and the total charging time of the odd-numbered sub-pixel units; and,

Calculate the ratio between the effective charging time and the total charging time, and use the ratio as the charging time duty ratio of the odd-numbered column sub-pixel units.

Optionally, the step of determining the target charging time duty cycle of the even-numbered sub-pixel units according to the charging time duty cycle of the odd-numbered sub-pixel units includes:

Acquiring the charging power of the odd-numbered sub-pixel units according to the charging time duty ratio of the odd-numbered sub-pixel units; and,

The target charging time duty cycle is determined according to the charging power of the odd-numbered column sub-pixel units.

Optionally, the display device includes a data line, a scanning line, and a sub-pixel unit, the data lines are arranged in a column direction, the left and right adjacent sub-pixel units share a data line, and the scanning lines are arranged in a row direction, the same The adjacent sub-pixel units in a row are connected to different scanning lines, and the sub-pixel units in the same row spaced apart from each other by a sub-pixel unit are connected to the same scanning line.

The scan line is connected to a scan drive circuit, the data line is connected to a data drive circuit, and the scan drive circuit and the data drive circuit drive the sub in such a manner that two scan pulses and data signal polarity are reversed once Pixel unit.

Optionally, the scan drive circuit scans according to the order of arrangement of the scan line contacts.

Optionally, the display panel is driven in a two-column drive mode.

Optionally, the odd-numbered sub-pixel units include two sub-pixel columns, and the even-numbered sub-pixel units include two sub-pixel columns; the odd-numbered sub-pixel units are spaced apart from the even-numbered sub-pixel units.

Optionally, the target charging time duty cycle is the charging time duty cycle to be adjusted.

Optionally, the charging time duty ratio of the sub-pixel unit charged at the trailing end is smaller than the charging time duty cycle of the sub-pixel unit charged at the starting end.

Optionally, the charging time of the odd-numbered sub-pixel units and/or the even-numbered sub-pixel units is detected by an oscilloscope.

To achieve the above object, the present application also provides a display device, the display device including:

Display panel, memory, processor, and driver of a display panel stored on the memory and runnable on the processor, when the driver of the display panel is executed by the processor, the display described below is realized Steps of panel driving method:

Obtain the charging time duty cycle of odd-numbered sub-pixel units;

Optionally, the display panel includes: scan lines, data lines, and sub-pixel units, the data lines are arranged along the column direction, the left and right adjacent sub-pixel units share a data line, and the scan lines are arranged along the row direction, Adjacent sub-pixel units in the same row are connected to different scan lines, and sub-pixel units in the same row spaced apart from each other by a sub-pixel unit are connected to the same scan line.

In order to achieve the above object, the present application also provides a computer-readable storage medium on which a driver for a display panel is stored. When the driver for the display panel is executed by a processor, the following The steps of the display panel drive method:

Obtain the charging time duty cycle of odd-numbered sub-pixel units;

Determining a target charging time duty cycle of the even-numbered sub-pixel units according to the charging time duty cycle of the odd-numbered sub-pixel units, the target charging time duty cycle being less than the charging time duty cycle of the odd-numbered sub-pixel units; and, The

The display panel driving method, display device and computer-readable storage medium provided by the present application determine the target charging time duty cycle of the even-numbered column sub-pixel units according to the charging time duty cycle of the odd-numbered sub-pixel units, and adjust the The charging time duty cycle to the target charging time duty cycle, wherein the target charging time duty cycle is smaller than the charging time duty cycle of the odd-numbered column sub-pixel units. This application solves the problem of vertical bright and dark lines on the display screen.

BRIEF DESCRIPTION

FIG. 1 is a schematic diagram of a hardware operating environment of a terminal involved in a solution of an embodiment of this application;

2 is a schematic flowchart of an embodiment of a method for driving a display panel of the present application;

3 is a schematic diagram of a pixel array of a half-source driven display device in this application;

4 is a schematic diagram of a pixel array of a half-source driven display device in this application;

Figure 5 is a schematic diagram of driving timing signals under ideal conditions;

FIG. 6 is a schematic diagram of driving timing signals in an actual situation.

The implementation, functional characteristics and advantages of the present application will be further described in conjunction with the embodiments and with reference to the drawings.

detailed description

It should be understood that the specific embodiments described herein are only used to explain the present application, and are not intended to limit the present application.

The present application provides a driving method for a display panel, which solves the problem of vertical bright and dark lines on the display screen.

As shown in FIG. 1, FIG. 1 is a schematic diagram of a hardware operating environment of a terminal involved in a solution of an embodiment of the present application.

The terminal in the embodiment of the present application is a display device. Referring to FIG. 1, the terminal may include: a processor 1001, such as a CPU, a memory 1002, and a communication bus 1003. Among them, the communication bus 1003 is provided to realize the connection communication between the components in the terminal. The memory 1002 may be a high-speed RAM memory or a stable memory (non-volatile memory), such as disk storage. The memory 1002 may optionally be a storage device independent of the foregoing processor 1001.

Those skilled in the art may understand that the structure of the terminal shown in FIG. 1 does not constitute a limitation on the terminal, and may include more or fewer components than those illustrated, or combine certain components, or arrange different components.

As shown in FIG. 1, the memory 1002, which is a computer storage medium, may include a display panel driver. The processor 1001 may be set to call the display panel driver stored in the memory 1002, and perform the following operations:

Obtain the charging time duty cycle of odd-numbered sub-pixel units;

Further, the processor 1001 may be set to call the driver of the display panel stored in the memory 1002, and perform the following operations:

Obtain the effective charging time of odd-numbered sub-pixel units;

Acquiring the next odd-numbered column sub-pixel unit to be charged; and,

In an embodiment, referring to FIG. 2, the driving method of the display panel includes:

Step S10: Obtain the charging time duty ratio of the odd-numbered sub-pixel units;

Step S20: Determine a target charging time duty cycle of the even-numbered column sub-pixel units according to the charging time duty cycle of the odd-numbered sub-pixel units, the target charging time duty cycle being less than the charging time duty cycle of the odd-numbered sub-pixel units ; The

Step S30: Adjust the charging time duty cycle of the even-numbered column sub-pixel units to the target charging time duty cycle.

In the half-source driving technology, as shown in FIG. 6, due to the RC signal delay effect, the square wave data signal on the data line is actually not the ideal square wave as shown in FIG. 5, but as shown in the data signal of FIG. 6 There is some bending at the voltage transition. When the scan lines are turned on in sequence, the pixel units are sequentially charged. The data signals obtained by the pixel units on the odd columns belong to the initial charge. Due to the rising process of the data signal at the initial position, the poor waveform will cause the brightness to be dark. The data signals obtained by the pixel units on the even-numbered columns belong to the tail-end charging, and the better waveform will result in brighter brightness, so it will cause vertical bright and dark lines. In this embodiment, the vertical bright lines and dark lines are avoided by adjusting the charging time duty ratio of the even-numbered sub-pixel units. It can be understood that the odd columns and even columns in this embodiment are only named according to the arrangement shown in FIG. 5 or FIG. 6, in other embodiments, the odd columns and even columns shown in FIG. 5 or FIG. 6 may be replaced, In this embodiment, it is only necessary to ensure that the charging time duty ratio of the sub-pixel unit charged at the trailing end is less than the charging time duty ratio of the sub-pixel unit charged at the starting end.

Specifically, the target charging time duty cycle of the even column sub-pixel unit is determined according to the charging time duty cycle of the odd column sub-pixel unit, and the charging time duty cycle of the even column sub-pixel unit is adjusted to the target charging time duty cycle, wherein The duty cycle of the target charging time is smaller than that of the sub-pixel units of the odd-numbered columns. It should be noted that the target charging time duty cycle refers to the charging time duty cycle to be adjusted.

The charging time duty cycle refers to the proportion of the effective charging time relative to the total charging time in one pulse cycle. The step of acquiring the charging time duty ratio of the odd-numbered sub-pixel units includes: acquiring the effective charging time and the total charging time of the odd-numbered sub-pixel units; calculating the ratio between the effective charging time and the total charging time, Use the ratio as the charging time duty cycle of the odd-numbered sub-pixel units. Wherein, the duty cycle of the odd-numbered sub-pixel units is 10% to 90%, and the duty cycle of the even-numbered sub-pixel units is 10% to 90%. It can be understood that the charging time (total charging time and effective charging time) of the sub-pixel unit can be detected by an instrument such as an oscilloscope.

Specifically, the target charging time of the even-numbered sub-pixel units may be determined according to the effective charging time of the odd-numbered sub-pixel units, and the effective charging time of the even-numbered sub-pixel units may be adjusted to the target charging time, where the target charging time is less than The effective charging time of the odd-numbered sub-pixel units is described.

Specifically, the odd-numbered columns can also be charged in advance, so that the data signal waveform obtained by the pixel units on the odd-numbered columns is better, and the data signal waveform obtained by the pixel units on the even-numbered columns is also better, thereby avoiding vertical bright and dark lines. The timing of early charging can be set according to the actual application. For example, when the even-numbered column preceding the odd-numbered column is charged, the odd-numbered column is charged. This pre-charging method can be realized by providing a pre-charged thin film transistor and a pre-charged working gate line, the pre-charged thin film transistor being connected to the pre-charged working gate line.

Further, the step of determining the target charging time duty cycle of the even-numbered sub-pixel units according to the charging time duty ratio of the odd-numbered sub-pixel units includes: acquiring the The charging power of odd-numbered sub-pixel units; and determining the target charging time duty cycle according to the charging power of the odd-numbered sub-pixel units. That is, the target charging power of the even-numbered sub-pixel units can be determined according to the charging power of the odd-numbered sub-pixel units, and the target charging effective time of the even-numbered sub-pixel units can be determined according to the target charging power, and the target charging time duty ratio can be further determined.

It should be noted that the above embodiment is described using a 2-column inversion driving method, and other driving methods may also be applied to this embodiment. For example, the driving method of 1+2 column inversion, then one of the columns is regarded as an odd column, and the other two adjacent columns are regarded as even columns.

In the technical solution disclosed in this embodiment, the target charging time duty cycle of the even-numbered sub-pixel units is determined according to the charging time duty ratio of the odd-numbered sub-pixel units, and the charging time duty of the even-numbered sub-pixel unit is adjusted to the target charging time Duty ratio, wherein the target charging time duty ratio is smaller than the charging time duty ratio of the odd-numbered column sub-pixel units. In this way, the problem of vertical bright and dark lines on the display screen is solved.

In one embodiment, on the basis of the above embodiments, the display device includes data lines, scanning lines, and sub-pixel units. The data lines are arranged along the column direction, and the left and right adjacent sub-pixel units share one data line The scan lines are arranged in the row direction, adjacent sub-pixel units in the same row are connected to different scan lines, and sub-pixel units in the same row spaced apart from each other by a sub-pixel unit are connected to the same scan line. The display panel driving method also include:

In this embodiment, the display device includes a scan line, a data line, and a sub-pixel unit, wherein the scan lines are arranged in a row direction, and the data lines are arranged in a column direction. The sub-pixel unit is formed by interlacing the scan line and the data line. As shown in FIG. 3, G represents a scan line, D represents a data line, R, G, and B are respectively sub-pixel units, and R, G, and B are combined to form a pixel unit. Adjacent sub-pixel units in the same row are connected to different scan lines, and sub-pixel units in the same row spaced apart from each other by a sub-pixel unit are connected to the same scan line; at least two adjacent columns of sub-pixel units share the same data line.

In terms of driving sequence, scanning is performed by scanning lines from top to bottom. The scan line applies a high voltage to the transistor of the pixel unit connected to it. At this time, the transistor is turned on and receives the incoming data signal from the data line connected to it. For pixel cells in the same row, the odd-numbered pixel cells on one side of the data line are driven first, and the even-numbered pixel cells on the other side of the data line are then driven. As shown in FIG. 4, when scanning to the scanning line G1, the pixel unit P11, P13 receives the incoming data signals of the data lines D1 and D2 respectively; when scanning to the scanning line G2, the pixel units P12 and P14 receive the incoming data signals of the data lines D1 and D2 respectively.

The half-source driven display device of this embodiment includes scan lines arranged in the row direction, data lines arranged in the column direction, a pixel unit formed by the scan lines and the data lines interlaced, and also includes a scan drive circuit electrically connected to the scan lines And a data driving circuit electrically connected to the data line. The scan drive circuit has a plurality of scan line contacts electrically connected to the scan line, and the data drive circuit has a plurality of data line contacts electrically connected to the data line. The scan drive circuit outputs the scan signal to the scan line through the scan line contact, and the data drive circuit outputs the data signal to the data line through the data line contact.

In this embodiment, a driving method in which two scan pulses and the polarity of the data signal are inverted once can be used. During the driving process, the scan driving circuit scans according to the arrangement order of the scan line contacts (that is, sequentially provides scan signals according to the arrangement order of the scan line contacts). For the pixel units of the same row, during the driving process of the first half of the scan lines, the odd-numbered pixel units on one side of the data line are driven first, and the even-numbered pixel units on the other side of the data line are then driven.

In the technical solution disclosed in this embodiment, the scan driving circuit and the data driving circuit drive the sub-pixel unit in such a manner that two scan pulses and the polarity of the data signal are reversed once, thus ensuring the display effect of the display device .

The present application also provides a display device including a display panel, a memory, a processor, and a driver of a display panel stored on the memory and operable on the processor, the display panel including a scan Lines, data lines and sub-pixel units, the data lines are arranged in the column direction, the left and right adjacent sub-pixel units share a data line, the scan lines are arranged in the row direction, and the adjacent sub-pixel units in the same row are connected to different Scanning lines, the sub-pixel units of the same row spaced apart from each other by a sub-pixel unit are connected to the same scanning line, and when the display panel driver is executed by the processor, the following steps of the display panel driving method are implemented:

Obtain the charging time duty cycle of odd-numbered sub-pixel units;

Embodiments of the present application also provide a computer-readable storage medium that stores a driver for a display panel, and when the driver for the display panel is executed by a processor, the following Drive method steps:

Obtain the charging time duty cycle of odd-numbered sub-pixel units;

The sequence numbers of the above embodiments of the present application are for description only, and do not represent the advantages and disadvantages of the embodiments.

Through the description of the above embodiments, those skilled in the art can clearly understand that the methods in the above embodiments can be implemented by means of software plus a necessary general hardware platform, and of course, can also be implemented by hardware, but in many cases the former is better Implementation. Based on this understanding, the essential contribution of the technical solutions of the present application can be embodied in the form of software products, which are stored in a storage medium (such as ROM/RAM, magnetic disk, optical disk) as described above In it, several instructions are included to enable a terminal device (which may be a television, mobile phone, computer, server, air conditioner, or network device, etc.) to execute the method described in each embodiment of the present application.

The above are only preferred embodiments of the present application, and do not limit the scope of the patent of the present application. Any equivalent structure or equivalent process transformation made by the description and drawings of this application, or directly or indirectly used in other related technical fields The same reason is included in the patent protection scope of this application.

Claims

A driving method of a display panel, wherein the driving method of the display panel includes the following steps:

Obtain the charging time duty cycle of odd-numbered sub-pixel units;

Determining a target charging time duty cycle of the even-numbered sub-pixel units according to the charging time duty cycle of the odd-numbered sub-pixel units, the target charging time duty cycle being less than the charging time duty cycle of the odd-numbered sub-pixel units; and,

Adjusting the charging time duty cycle of the even-numbered column sub-pixel units to the target charging time duty cycle.
The driving method of the display panel according to claim 1, wherein the duty cycle of the odd-numbered sub-pixel units is 10% to 90%, and the duty cycle of the even-numbered sub-pixel units is 10% to 90%.
The driving method of the display panel according to claim 1, wherein the driving method of the display panel further comprises:

Obtain the effective charging time of odd-numbered sub-pixel units;

Determining the target charging time of the even-numbered sub-pixel units according to the effective charging time of the odd-numbered sub-pixel units, the target charging time being less than the effective charging time of the odd-numbered sub-pixel units; and,

Adjusting the effective charging time of the even column sub-pixel units to the target charging time.
The driving method of the display panel according to claim 1, wherein the driving method of the display panel further comprises:

Acquiring the next odd-numbered column sub-pixel unit to be charged; and,

Controlling the next odd column sub-pixel unit to be charged to perform a charging operation.
The driving method of a display panel according to claim 4, wherein the next odd-numbered column of sub-pixel units to be charged is arranged adjacent to the currently charged even-numbered column of sub-pixel units.
The driving method of the display panel according to claim 1, wherein the step of acquiring the charge time duty ratio of the odd-numbered column sub-pixel units includes:

Acquiring the effective charging time and the total charging time of the odd-numbered sub-pixel units; and,

Calculate the ratio between the effective charging time and the total charging time, and use the ratio as the charging time duty ratio of the odd-numbered column sub-pixel units.
The driving method of the display panel according to claim 1, wherein the step of determining the target charging time duty ratio of the even-numbered sub-pixel units according to the charging time duty ratio of the odd-numbered sub-pixel units includes:

Acquiring the charging power of the odd-numbered sub-pixel units according to the charging time duty ratio of the odd-numbered sub-pixel units; and,

The target charging time duty cycle is determined according to the charging power of the odd-numbered column sub-pixel units.
The driving method of the display panel according to claim 1, wherein the display device includes a data line, a scanning line, and a sub-pixel unit, the data line is arranged in a column direction, and the left and right adjacent sub-pixel units share a data line The scan lines are arranged in the row direction, adjacent sub-pixel units in the same row are connected to different scan lines, and sub-pixel units in the same row spaced apart from each other by a sub-pixel unit are connected to the same scan line. The display panel driving method also include:

The scan line is connected to a scan drive circuit, the data line is connected to a data drive circuit, and the scan drive circuit and the data drive circuit drive the sub in such a manner that two scan pulses and data signal polarity are reversed once Pixel unit.
The driving method of the display panel according to claim 8, wherein the scan drive circuit scans according to the order of arrangement of the scan line contacts.
The driving method of the display panel according to claim 1, wherein the display panel is driven by a two-column inversion driving method.
The driving method of the display panel according to claim 1, wherein the display panel is driven by a three-column inversion driving method.
The driving method of the display panel according to claim 11, wherein the odd-numbered column sub-pixel unit includes one sub-pixel column, and the even-numbered column sub-pixel unit includes two sub-pixel columns; the odd-numbered column sub-pixel unit and the even-numbered column sub-unit The pixel unit is set at intervals.
The driving method of the display panel according to claim 1, wherein the charging time duty ratio of the sub-pixel unit charged at the end is smaller than the charging time duty of the sub-pixel unit charged at the start end.
The driving method of the display panel according to claim 1, wherein the charging time of the odd-numbered sub-pixel units and/or the even-numbered sub-pixel unit is detected by an oscilloscope.
A display device, wherein the display device includes a display panel, a memory, a processor, and a driver of a display panel stored on the memory and operable on the processor, the driver of the display panel is When the processor executes, the following steps of the display panel driving method are implemented:

Obtain the charging time duty cycle of odd-numbered sub-pixel units;

Determining a target charging time duty cycle of the even-numbered sub-pixel units according to the charging time duty cycle of the odd-numbered sub-pixel units, the target charging time duty cycle being less than the charging time duty cycle of the odd-numbered sub-pixel units; and,

Adjusting the charging time duty cycle of the even-numbered column sub-pixel units to the target charging time duty cycle.
The display device according to claim 15, wherein the display panel includes: scanning lines, data lines, and sub-pixel units, the data lines are arranged in a column direction, and the left and right adjacent sub-pixel units share a data line. The scan lines are arranged in a row direction, adjacent sub-pixel units in the same row are connected to different scan lines, and sub-pixel units in the same row spaced apart from each other by a sub-pixel unit are connected to the same scan line.
A computer-readable storage medium storing a display panel driver on the computer-readable storage medium, the steps of the display panel driving method described below are implemented when the display panel driver is executed by a processor:

Obtain the charging time duty cycle of odd-numbered sub-pixel units;

Determining a target charging time duty cycle of the even-numbered sub-pixel units according to the charging time duty cycle of the odd-numbered sub-pixel units, the target charging time duty cycle being less than the charging time duty cycle of the odd-numbered sub-pixel units; and,

Adjusting the charging time duty cycle of the even-numbered column sub-pixel units to the target charging time duty cycle.