CN110085189B

CN110085189B - Display substrate, display device and picture display method

Info

Publication number: CN110085189B
Application number: CN201910403236.2A
Authority: CN
Inventors: 赵爽; 孙继刚; 赵晶; 王磊; 苏旭; 宗少雷
Original assignee: BOE Technology Group Co Ltd; Ordos Yuansheng Optoelectronics Co Ltd
Current assignee: BOE Technology Group Co Ltd; Ordos Yuansheng Optoelectronics Co Ltd
Priority date: 2019-05-15
Filing date: 2019-05-15
Publication date: 2021-04-02
Anticipated expiration: 2039-05-15
Also published as: CN110085189A; WO2020228411A1

Abstract

The invention provides a display substrate, a display device and a picture display method, belongs to the technical field of display, and can solve the problem that the gray scale flicker phenomenon is serious in the existing low-frequency display. The display substrate is additionally provided with a compensation starting circuit and a voltage compensation circuit; when a gray scale picture or a flicker picture is displayed, the pixel is charged through the compensation starting circuit and the voltage compensation circuit, so that the problem that the flicker is aggravated due to the reduction of the pixel voltage caused by the leakage of the TFT is solved.

Description

Display substrate, display device and picture display method

Technical Field

The invention belongs to the technical field of display, and particularly relates to a display substrate, a display device and a picture display method.

Background

The inventor finds that at least the following problems exist in the prior art: a Thin Film Transistor (TFT) generates a leakage current when a gray scale voltage is applied, thereby causing a Flicker phenomenon in a Liquid Crystal Display (LCD) and affecting a Display effect. When the display is performed at low frequency, the gray scale flicker phenomenon is more serious.

Disclosure of Invention

The invention provides a display substrate, a display device and a picture display method, aiming at the problem that the gray scale flicker phenomenon is serious in the existing low-frequency display.

The technical scheme adopted for solving the technical problem of the invention is as follows:

a display substrate, comprising: a display area and a non-display area, the display area including: a plurality of gate lines and a plurality of data lines, a plurality of pixel circuits defined by the gate lines and the data lines, each pixel circuit being connected to the gate lines of a corresponding row and the data lines of a corresponding column;

the non-display area includes: the circuit comprises a grid driving circuit, a source driving circuit, a compensation starting circuit and a voltage compensation circuit;

the grid driving circuit is provided with a plurality of first signal output ends which are in one-to-one correspondence with the grid lines, and the first signal output ends are connected with one ends of the corresponding grid lines;

the source electrode driving circuit is provided with a plurality of second signal output ends which are in one-to-one correspondence with the data lines, and the second signal output ends are connected with one ends of the corresponding data lines;

the compensation starting circuit is provided with a plurality of third signal output ends which correspond to the grid lines one to one, and the third signal output ends are connected with the other ends of the corresponding grid lines and used for writing a conducting signal into the corresponding grid lines through each third signal output end when a gray scale picture or a flickering picture is displayed;

the voltage compensation circuit is provided with a plurality of fourth signal output ends in one-to-one correspondence with the data lines, the fourth signal output ends are connected with the other ends of the corresponding data lines and used for writing compensation signals into the corresponding data lines through the fourth signal output ends when gray scale pictures are displayed and writing compensation signals into the corresponding data lines through the fourth signal output ends connected with odd-numbered row data lines or the fourth signal output ends connected with even-numbered row data lines when flashing pictures are displayed.

Optionally, the compensation starting circuit includes: a plurality of first switching tubes in one-to-one correspondence with the third signal output ends;

the control electrode of the first switch tube is connected with a control starting signal line, the first electrode of the first switch tube is connected with a conducting signal supply line, and the second electrode of the first switch tube is connected with a corresponding third signal output end.

Optionally, the control start signal line includes: an odd control start signal line and an even control start signal line; the conduction signal supply line includes: an odd conduction supply line and an even conduction supply line;

the control starting signal line connected with the grid electrode of the first switching tube connected with the grid line of the odd-numbered row is the odd control starting signal line;

the control starting signal line connected with the grid electrode of the first switching tube connected with the grid lines of the even rows is the even control starting signal line;

a conducting signal supply line connected with a first pole of a first switching tube connected with the grid line of the odd-numbered row is the odd conducting supply line;

and the conducting signal supply line connected with the first pole of the first switching tube connected with the grid line of the even number row is the even conducting supply line.

Optionally, the first switch tube connected to the gate line of the odd-numbered row, the odd control start signal line, and the odd conduction supply line are all located on a first side of the display region;

the first switch tubes connected with the grid lines of the even rows, the even control starting signal lines and the even conducting supply lines are all positioned on the second side of the display area;

the first side is opposite the second side.

Optionally, the display substrate further includes: a driving chip;

the control starting signal line and the conducting signal supply line are both connected with the driving chip, and the driving chip is used for respectively providing corresponding control signals and conducting signals for the control starting signal line and the conducting signal supply line.

Optionally, the voltage compensation circuit includes: the second switch tubes correspond to the fourth signal output ends one by one;

and the control electrode of the second switching tube is connected with a control compensation signal line, the first electrode of the second switching tube is connected with a compensation signal supply line, and the second electrode of the second switching tube is connected with a fourth signal output end.

Optionally, the control compensation signal line includes an odd control compensation signal line and an even control compensation signal line;

the control compensation signal line connected with the grid electrode of the second switching tube connected with the data line of the odd column is an odd control compensation signal line;

and the control compensation signal line connected with the grid electrode of the second switch tube connected with the data line of the even-numbered column is an even control compensation signal line.

Optionally, the source driving circuit is located at a third side of the display area, and the voltage compensation circuit is located at a fourth side of the display area;

the third side is opposite the fourth side.

The invention also provides a display device comprising the display substrate.

Optionally, the display device further includes: the device comprises a detection module and a control module;

the detection module is used for determining whether the picture to be displayed is a gray scale picture or a flickering picture according to the received video signal;

the control module is used for controlling the compensation starting circuit to write a conducting signal into a corresponding gate line through each third signal output end when the detection module detects that the picture to be displayed is a gray-scale picture, and controlling the voltage compensation circuit to write a compensation signal into a corresponding data line through each fourth signal output end; and the voltage compensation circuit is also used for controlling the compensation starting circuit to write a conducting signal into the corresponding grid line through each third signal output end when the detection module detects that the picture to be displayed is a flicker picture, and controlling the voltage compensation circuit to write a compensation signal into the corresponding data line through a fourth signal output end connected with the odd-numbered row data line or a fourth signal output end connected with the even-numbered row data line.

The invention also provides an image display method based on the display device, which comprises the following steps:

the detection module determines whether the picture to be displayed is a gray-scale picture or a flickering picture according to the received video signal;

when the detection module detects that the picture to be displayed is a gray-scale picture, the control module controls the compensation starting circuit to write a conducting signal into the corresponding grid line through each third signal output end and controls the voltage compensation circuit to write a compensation signal into the corresponding data line through each fourth signal output end;

when the detection module detects that the picture to be displayed is a flicker picture, the control module controls the compensation starting circuit to write a conducting signal into the corresponding grid line through each third signal output end, and controls the voltage compensation circuit to write a compensation signal into the corresponding data line through a fourth signal output end connected with odd-numbered columns of data lines or a fourth signal output end connected with even-numbered columns of data lines.

Drawings

Fig. 1 is a schematic circuit diagram of a display substrate according to embodiment 1 of the present invention;

FIG. 2 is a flowchart illustrating a screen display method according to embodiment 4 of the present invention;

FIG. 3 is a scan timing chart of a normal display of the frame display method according to embodiment 4 of the present invention;

FIG. 4 is a timing diagram of scanning a gray-scale frame in the frame display method according to embodiment 4 of the present invention;

FIG. 5 is a schematic view of displaying a gray-scale image according to the image display method of embodiment 4 of the present invention;

FIG. 6 is a timing chart of the scanning of the flashing frames in the frame display method according to embodiment 4 of the present invention;

FIG. 7 is a view showing a flicker screen display in the screen display method according to embodiment 4 of the present invention;

wherein the reference numerals are: 1. a source driver circuit; 2. a compensation turn-on circuit; 3. a voltage compensation circuit.

Detailed Description

In order to make the technical solutions of the present invention better understood, the present invention is further described in detail below with reference to the accompanying drawings and the detailed description.

Example 1:

the present embodiment provides a display substrate, as shown in fig. 1, including: a display area and a non-display area at an edge of the display area, the display area including: a plurality of Gate lines Gate1, Gate2, … … and a plurality of data lines, a plurality of pixel circuits defined by the Gate lines and the data lines, each pixel circuit being connected to the Gate lines of a corresponding row and the data lines of a corresponding column;

the non-display area includes: the circuit comprises a grid driving circuit, a source driving circuit 1, a compensation starting circuit 2 and a voltage compensation circuit 3;

the source electrode driving circuit 1 is provided with a plurality of second signal output ends which are in one-to-one correspondence with the data lines, and the second signal output ends are connected with one ends of the corresponding data lines;

the compensation starting circuit 2 is provided with a plurality of third signal output ends which correspond to the grid lines one by one, and the third signal output ends are connected with the other ends of the corresponding grid lines and used for writing conducting signals into the corresponding grid lines through the third signal output ends when gray scale pictures or flickering pictures are displayed;

the voltage compensation circuit 3 has a plurality of fourth signal output ends in one-to-one correspondence with the data lines, and the fourth signal output ends are connected to the other ends of the corresponding data lines, and are used for writing compensation signals into the corresponding data lines through the fourth signal output ends when displaying a gray-scale picture, and for writing compensation signals into the corresponding data lines through the fourth signal output ends connected to odd-numbered column data lines or the fourth signal output ends connected to even-numbered column data lines when displaying a flicker picture.

The display substrate of the embodiment charges the pixels in a gray-scale picture or a flicker picture to solve the problem that the pixel voltage is reduced and the flicker is aggravated due to the leakage of the TFT. The display substrate is suitable for various display devices, in particular for MDL low-frequency display devices.

As an optional implementation in this embodiment, the compensation starting circuit 2 includes: a plurality of first switching tubes T1 in one-to-one correspondence with the third signal output terminals;

a control electrode of the first switch T1 is connected to a control-on signal line G-W, a first electrode of the first switch T1 is connected to a conduction signal supply line G, and a second electrode of the first switch T1 is connected to a corresponding third signal output terminal.

In one embodiment, the control-on signal line G-W includes: an odd control starting signal line G-W-R and an even control starting signal line G-W-L; the on signal supply line G includes: odd conduction supply lines G-R and even conduction supply lines G-L;

the control starting signal line connected with the Gate of the first switching tube T1 connected with the Gate lines Gate1 and Gate3 … … of the odd rows is the odd control starting signal line G-W-R;

the control starting signal line connected with the Gate of the first switching tube T1 connected with the Gate lines Gate2 and Gate4 … … of the even-numbered rows is the even control starting signal line G-W-L;

the odd conducting supply line G-R is a conducting signal supply line connected to the first pole of the first switch tube T1 connected to the Gate lines Gate1 and Gate3 … … in odd-numbered rows;

the even conduction supply line G-L is a conduction signal supply line connected to the first electrode of the first switching transistor T1 connected to the Gate lines Gate2 and Gate4 … … in the even-numbered rows.

In one embodiment, the first switching transistor T1, the odd control-on signal line G-W-R, and the odd conduction supply line G-R connected to the Gate lines Gate1 and Gate3 … … of the odd rows are located at a first side of the display region (right side of the display region in fig. 1); the first switch tube T1, the even control start signal line G-W-L, and the even conduction supply line G-L connected to the Gate lines Gate2 and Gate4 … … of the even rows are all located at a second side of the display region (left side of the display region in fig. 1); the first side is opposite the second side.

In one embodiment, the display substrate further comprises: a driver chip IC; the control starting signal lines G-W and the conducting signal supply line G are both connected with the driving chip IC, and the driving chip IC is used for respectively providing corresponding control signals and conducting signals for the control starting signal lines G-W and the conducting signal supply line G.

In one embodiment, the voltage compensation circuit 3 includes: a plurality of second switching tubes T2 in one-to-one correspondence with the fourth signal output terminals;

a control electrode of the second switch tube T2 is connected to a control compensation signal line S-W, a first electrode of the second switch tube T2 is connected to a compensation signal supply line S-Level, and a second electrode of the second switch tube T2 is connected to a fourth signal output terminal.

In one embodiment, the control compensation signal lines include an ODD control compensation signal line S-W-ODD and an EVEN control compensation signal line S-W-EVEN;

the control compensation signal line connected with the grid electrode of the second switching tube T2 connected with the data line of the ODD column is an ODD control compensation signal line S-W-ODD;

and the control compensation signal line connected with the grid electrode of the second switching tube connected with the data line of the EVEN column is an EVEN control compensation signal line S-W-EVEN.

In one embodiment, the source driving circuit 1 is located at the third side of the display area (the lower side of the display area in fig. 1), and the voltage compensation circuit 3 is located at the fourth side of the display area (the upper side of the display area in fig. 1); the third side is opposite the fourth side.

In the embodiment of the present invention, the first switch transistor T1 and the second switch transistor T2 are independently selected from one of a polysilicon thin film transistor, an amorphous silicon thin film transistor, an oxide thin film transistor, and an organic thin film transistor. The transistors can be thin film transistors or field effect transistors or other devices with the same characteristics, and the source and the drain of the transistors can be interchanged under certain conditions, so that the source and the drain are not different from the description of the connection relationship. In the embodiment of the invention, to distinguish the source and the drain of the transistor, one of the poles is called a first pole, the other pole is called a second pole, and the gate is called a control pole. Further, transistors can be classified into N-type and P-type according to characteristics of the transistors, and the following embodiments are described in which the transistors are P-type transistors. When a P-type transistor is adopted, the first electrode is the source electrode of the P-type transistor, the second electrode is the drain electrode of the P-type transistor, when the grid electrode inputs a low level, the source electrode and the drain electrode are conducted, and the N type is opposite. It is contemplated that implementing the transistors as N-type transistors will be readily apparent to those skilled in the art without inventive effort and is therefore within the scope of the embodiments of the present invention.

Unless defined otherwise, technical or scientific terms used in the disclosure of the embodiments of the present invention should have the same meaning as commonly understood by one of ordinary skill in the art to which the present invention belongs. The use of "first," "second," and similar terms in the embodiments of the invention are not intended to indicate any order, quantity, or importance, but rather are used to distinguish one element from another. The word "comprising" or "comprises", and the like, means that a element or item that precedes the word is identified by error or that the element or item listed after the word is identified by error, and that other elements or items are not excluded. The terms "connected" or "coupled" and the like are not restricted to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "upper", "lower", "left", "right", and the like are used merely to indicate relative positional relationships, and when the absolute position of the object being described is changed, the relative positional relationships may also be changed accordingly.

Example 3:

the present embodiment provides a display device, including the display substrate of the above embodiments.

In one embodiment, the display device further includes: a detection module and a control module;

The display device may be: the display device comprises any product or component with a display function, such as a liquid crystal display panel, electronic paper, a mobile phone, a tablet personal computer, a television, a display, a notebook computer, a digital photo frame, a navigator and the like.

Example 4:

the present embodiment provides a picture display method, where the picture display method is based on the display device of the foregoing embodiment, and the picture display method includes:

s01, the detection module determines whether the picture to be displayed is a gray scale picture or a flashing picture according to the received video signal;

s02a, when the detection module detects that the image to be displayed is a gray-scale image, the control module controls the compensation starting circuit 2 to write a conducting signal to the corresponding gate line through each third signal output terminal, and controls the voltage compensation circuit 3 to write a compensation signal to the corresponding data line through each fourth signal output terminal;

and S02b, when the detection module detects that the picture to be displayed is a flicker picture, the control module controls the compensation starting circuit 2 to write a conducting signal into the corresponding grid line through each third signal output end, and controls the voltage compensation circuit 3 to write a compensation signal into the corresponding data line through a fourth signal output end connected with an odd-numbered column data line or a fourth signal output end connected with an even-numbered column data line.

The following description will be made specifically by taking a screen display of a mobile phone as an example, and the display method of other display devices is similar to that.

As shown in fig. 2, when the mobile phone system sends a frame of data to the detection module, the detection module determines whether the frame of data is a gray scale image or a flashing image according to the received frame of data, specifically, the detection module compares whether the voltage of the frame of data is consistent with the rated voltage of a pre-stored gray scale image or a flashing image, if not, it determines that the frame of data sent by the mobile phone system does not belong to the gray scale image or the flashing image, as shown in fig. 3, the S-W-ODD, the S-W-EVEN, the S-Level, the G-W-L, G-W-R, G-L, G-R is a low Level, the compensation start circuit and the voltage compensation circuit do not work, and the mobile phone normally displays the frame of data at this time.

If the frame sent by the mobile phone system is judged to belong to a gray scale frame, the control module controls the compensation starting circuit to write a conducting signal into the corresponding grid line through each third signal output end and controls the voltage compensation circuit to write a compensation signal into the corresponding data line through each fourth signal output end; as shown in FIGS. 4 and 5, the S-W-ODD, S-W-EVEN, G-W-L, G-W-R, G-L, G-R are high. G-W-L, G-W-R, G-L, G-R controls all Gate lines Gate to be turned on, and S-W-ODD and S-W-EVEN control the ODD-EVEN column sub-pixels to be turned on. The S-Level is a charging voltage, and the voltage is determined by the data voltage of the gray-scale picture.

And if the frame of picture sent by the mobile phone system is judged to belong to a flicker picture, the control module controls the compensation starting circuit to write a conducting signal into the corresponding grid line through each third signal output end and controls the voltage compensation circuit to write a compensation signal into the corresponding data line through a fourth signal output end connected with the odd-numbered data lines. As shown in FIGS. 6 and 7, the S-W-ODD, G-W-L, G-W-R, G-L, G-R are high; S-W-EVEN is low level; G-W-L, G-W-R, G-L, G-R controls all gates to be turned on, S-W-ODD controls ODD column sub-pixels to be turned on, and S-W-EVEN controls EVEN column sub-pixels to be turned off. S-Level is a charging voltage, and the voltage is determined by the data voltage of a flickering picture;

or the control module controls the compensation starting circuit to write the conducting signals into the corresponding grid lines through the third signal output ends and controls the fourth signal output ends connected with the even-numbered rows of data lines to write the compensation signals into the corresponding data lines. S-W-EVEN, G-W-L, G-W-R, G-L, G-R are high level; S-W-ODD is low level; G-W-L, G-W-R, G-L, G-R controls all gates to be turned on, S-W-EVEN controls EVEN column sub-pixels to be turned on, and S-W-ODD controls ODD column sub-pixels to be turned off.

In the present embodiment, in the Blanking interval, the pixel is charged with the corresponding gray scale picture or the flashing picture, so as to solve the problem that the pixel voltage is reduced and the flashing is aggravated due to the TFT leakage.

It will be understood that the above embodiments are merely exemplary embodiments taken to illustrate the principles of the present invention, which is not limited thereto. It will be apparent to those skilled in the art that various modifications and improvements can be made without departing from the spirit and substance of the invention, and these modifications and improvements are also considered to be within the scope of the invention.

Claims

1. A display substrate, comprising: a display area and a non-display area, the display area including: a plurality of gate lines and a plurality of data lines, a plurality of pixel circuits defined by the gate lines and the data lines, each pixel circuit being connected to the gate lines of a corresponding row and the data lines of a corresponding column;

the compensation starting circuit is provided with a plurality of third signal output ends which correspond to the grid lines one to one, and the third signal output ends are connected with the other ends of the corresponding grid lines and used for writing conducting signals into the corresponding grid lines through the third signal output ends when gray scale pictures or flickering pictures are displayed; wherein the gray-scale picture is a pure-color picture;

the voltage compensation circuit is provided with a plurality of fourth signal output ends in one-to-one correspondence with the data lines, the fourth signal output ends are connected with the other ends of the corresponding data lines and used for writing compensation signals into the corresponding data lines through the fourth signal output ends when gray scale pictures are displayed and writing the compensation signals into the corresponding data lines through the fourth signal output ends connected with odd-numbered line data lines or the fourth signal output ends connected with even-numbered line data lines when flashing pictures are displayed.

2. The display substrate of claim 1, wherein the compensation turn-on circuit comprises: a plurality of first switching tubes in one-to-one correspondence with the third signal output ends;

3. The display substrate according to claim 2, wherein the control start signal line comprises: an odd control start signal line and an even control start signal line; the conduction signal supply line includes: an odd conduction supply line and an even conduction supply line;

a conducting signal supply line connected with a first electrode of the first switch tube connected with the grid line of the odd-numbered row is the odd conducting supply line;

and the conduction signal supply line connected with the first pole of the first switching tube connected with the grid line of the even-numbered row is the even conduction supply line.

4. The display substrate of claim 3, wherein the first switching tubes connected to the gate lines of the odd rows, the odd control turn-on signal lines, and the odd conduction supply lines are all located on a first side of the display region;

the first side is opposite the second side.

5. The display substrate of claim 2, further comprising: a driving chip;

6. The display substrate of claim 1, wherein the voltage compensation circuit comprises: the second switch tubes correspond to the fourth signal output ends one by one;

and the control electrode of the second switch tube is connected with a control compensation signal line, the first electrode of the second switch tube is connected with a compensation signal supply line, and the second electrode of the second switch tube is connected with a fourth signal output end.

7. The display substrate according to claim 6, wherein the control compensation signal line comprises an odd control compensation signal line and an even control compensation signal line;

8. The display substrate according to claim 6, wherein the source driving circuit is located at a third side of the display area, and the voltage compensation circuit is located at a fourth side of the display area;

the third side is opposite the fourth side.

9. A display device, comprising: the display substrate of any one of claims 1-8.

10. The display device according to claim 9, further comprising: the device comprises a detection module and a control module;

the control module is used for controlling the compensation starting circuit to write a conducting signal into the corresponding grid line through each third signal output end when the detection module detects that the picture to be displayed is a gray-scale picture, and controlling the voltage compensation circuit to write a compensation signal into the corresponding data line through each fourth signal output end; and the voltage compensation circuit is also used for controlling the compensation starting circuit to write a conducting signal into the corresponding grid line through each third signal output end when the detection module detects that the picture to be displayed is a flicker picture, and controlling the voltage compensation circuit to write a compensation signal into the corresponding data line through a fourth signal output end connected with the odd-numbered row data lines or a fourth signal output end connected with the even-numbered row data lines.

11. A screen display method based on the display device according to claim 10, comprising:

the detection module determines whether the picture to be displayed is a gray-scale picture or a flickering picture according to the received video signal; wherein the gray-scale picture is a pure-color picture;