WO2014000393A1

WO2014000393A1 - Liquid crystal display and drive method therefor

Info

Publication number: WO2014000393A1
Application number: PCT/CN2012/086615
Authority: WO
Inventors: 李成; 董学
Original assignee: 北京京东方光电科技有限公司
Priority date: 2012-06-29
Filing date: 2012-12-14
Publication date: 2014-01-03
Also published as: CN103514846A

Abstract

Disclosed is a drive method for a liquid crystal display, comprising: first, driving pixels connected to the gate lines in odd-numbered rows one line after another for the gate lines in odd-numbered rows, and then driving pixels connected to the gate lines in even-numbered rows one line after another for the gate lines in even-numbered rows; or alternatively first, driving pixels connected to the gate lines in even-numbered rows one line after another for the gate lines in even-numbered rows, and then driving pixels connected to the gate lines in odd-numbered rows one line after another for the gate lines in odd-numbered rows. Correspondingly, also disclosed is a liquid crystal display which can achieve the Z reversal of a pixel having a dual-gate pixel structure, and effectively reduce the power consumption of the liquid crystal display on the premise of ensuring high image quality.

Description

Liquid crystal display and driving method thereof

The present invention relates to liquid crystal display technology, and more particularly to a liquid crystal display and a driving method thereof. Background technique

A liquid crystal display (LCD) includes a gate driving circuit, a data driving circuit, and a pixel area. The gate driving circuit includes a plurality of gate lines for sequentially generating gate driving signals, and the gate lines are parallel lines; the data driving circuit includes a plurality of data lines for generating data driving signals, each of which The data lines are parallel lines; the pixels in the pixel area are located at the staggered positions of the gate lines and the data lines, and are driven by the gate driving signals generated by the corresponding gate lines to receive the data driven by the corresponding data lines. signal.

At present, in order to reduce the cost, the dual gate pixel structure is more and more widely used in LCDs, but there is no liquid crystal with low power consumption and high picture quality with dual gate pixel structure. Display drive method. Summary of the invention

In view of this, embodiments of the present invention provide a liquid crystal display and a driving method thereof for realizing a liquid crystal display driving of a dual-gate pixel structure, which can reduce power consumption and ensure high picture quality.

Embodiments of the present invention provide a driving method of a liquid crystal display. The liquid crystal display includes a gate driving circuit, a data driving circuit, and a plurality of pixel groups. The gate driving circuit includes a plurality of pairs of gate lines, and each pair of gate lines includes An odd-numbered row of gate lines and an even-numbered row of gate lines, the data driving circuit comprising a plurality of data lines, each pixel group comprising two adjacent pixels in the same row, each pixel comprising a thin film transistor and a pixel Electrode, all pixels are arranged in a plurality of rows and columns, and pixel electrodes of two pixels in the same pixel group are respectively connected to the same data line through their corresponding thin film transistors and connected to different gate lines in the same pair of gate lines Upper

The driving method of the liquid crystal display comprises: driving pixels connected to an odd-numbered row gate line by an odd-numbered row of gate lines, and driving pixels connected to an even-numbered row of gate lines by an even-numbered row of gate lines; In the same frame picture, the data driving signals of the pixels connected to the odd-numbered row gate lines have the same polarity, and the data driving signals of the pixels connected to the even-numbered row gate lines have the same polarity and are connected in the odd-numbered lines. The polarity of the data drive signal of the pixel on the gate line is opposite to the polarity of the data drive signal of the pixel connected to the even row gate line.

In one example, the polarity of the data drive signal is opposite for each pixel in the odd frame picture and the even frame picture.

In one example, in the process of driving pixels connected to odd-numbered row gate lines on an odd-numbered row gate line, the data driving circuit outputs a negative-polarity data driving signal on each data line; In the process of driving the gate lines to connect the pixels on the even-numbered row gate lines, the data driving circuit outputs a positive polarity data driving signal on each of the data lines.

The embodiment of the invention further provides a driving method of a liquid crystal display, the liquid crystal display comprises a gate driving circuit, a data driving circuit and a plurality of pixel groups; wherein the gate driving circuit comprises a plurality of pairs of gate lines, each pair of gate lines An odd row gate line and an even row gate line are included, the data driving circuit includes a plurality of data lines, each pixel group includes two adjacent pixels in the same row, each pixel includes a thin film transistor and a pixel a pixel electrode, all pixels are arranged in a plurality of rows and columns, and pixel electrodes of two pixels in the same pixel group are respectively connected to the same data line through their corresponding thin film transistors and connected to different gates in the same pair of gate lines Online

The driving method of the liquid crystal display includes: driving pixels connected to an even-numbered row gate line by an even-numbered row of gate lines, and driving pixels connected to an odd-numbered row of gate lines by an odd-numbered row of gate lines; In the same frame picture, the data driving signals of the pixels connected to the odd-numbered row gate lines have the same polarity, and the data driving signals of the pixels connected to the even-numbered row gate lines have the same polarity and are connected to the odd-numbered row gate lines. The polarity of the data drive signal of the pixel is opposite to the polarity of the data drive signal of the pixel connected to the even row of gate lines.

In one example, in a process of driving pixels connected on even-numbered gate lines on an even-numbered row gate line, the data driving circuit outputs a negative-polarity data driving signal on each data line; In the process of driving the gate lines to connect the pixels on the odd-numbered row gate lines, the data driving circuit outputs a positive polarity data driving signal on each of the data lines.

The embodiment of the invention further provides a liquid crystal display comprising a gate driving circuit, a data driving circuit and a plurality of pixel groups; wherein the gate driving circuit comprises a plurality of pairs of gate lines, each pair of gate lines comprises An odd row gate line and an even row gate line, the data driving circuit includes a plurality of data lines, each pixel group includes two adjacent pixels in the same row, each pixel includes one Thin film transistor and one pixel electrode, all pixels are arranged in a plurality of rows and columns, and pixel electrodes of two pixels in the same pixel group are respectively connected to the same data line through their corresponding thin film transistors and connected to the same pair of gate lines Different gate lines;

The gate driving circuit is configured to first drive pixels connected to the odd-numbered row gate lines by odd-numbered row gate lines, and then drive the pixels connected to the even-numbered row gate lines by even-numbered rows of gate lines; or , for driving the pixels connected to the even-numbered row gate lines first by the even-numbered row gate lines, and driving the pixels connected to the odd-numbered row gate lines by the odd-numbered row gate lines;

In the same frame picture, the data driving signals of the pixels connected to the odd-numbered row gate lines have the same polarity, and the data driving signals of the pixels connected to the even-numbered row gate lines have the same polarity and are connected to the odd-numbered row gate lines. The data drive signal polarity of the pixel is opposite to the polarity of the data drive signal of the pixel connected to the even row gate line.

In one example, the data driving circuit is configured to output a negative electrode on each data line in the process of driving the pixels connected to the odd-numbered row gate lines by the gate driving circuit on the odd-numbered row gate lines. a data driving signal; in the process of driving the pixels connected to the even-numbered row gate lines by the gate driving circuit by the even-numbered row gate lines, outputting a positive data driving signal on each data line; or a process for driving a pixel connected to an even-numbered row gate line by an even-numbered row gate line in the gate driving circuit, and outputting a negative-polarity data driving signal on each of the data lines; The pole drive circuit drives the pixels connected to the odd-numbered row gate lines one by one of the odd-numbered gate lines, and outputs a positive data drive signal on each of the data lines.

In the liquid crystal display and the liquid crystal display driving method thereof according to the embodiment of the present invention, the gate driving circuit first drives the pixels connected to the gate lines of the odd-numbered rows (or even-numbered rows) on the odd-numbered rows (or even-numbered rows) of the gate lines, and then The even-numbered rows (or odd-numbered rows) of the gate lines drive the pixels connected to the even-numbered rows (or odd-numbered rows) of the gate lines, adjust the driving mode of the gate driving signals, and realize the liquid crystal display driving of the double-gate pixel structure. It not only meets the requirements of low power consumption and low cost, but also guarantees the yield based on the existing technology. In addition, in the present invention, the data driving circuit outputs the data driving signals in the odd-numbered gate line driving process of the gate driving circuit and the even-numbered row-gate driving process in opposite polarity, so that during the display of one frame of the screen, Each data line only needs to convert the polarity of the data driving signal once, so that each pixel can be inverted, and the Z-inversion of the double-gate pixel is realized, and the liquid crystal display is effectively reduced under the premise of ensuring high picture quality. Power consumption. DRAWINGS

1 is a schematic diagram of a gate driving signal outputted when a gate driving circuit performs interlaced driving on a gate line according to an embodiment of the present invention;

2 is a schematic structural view of a liquid crystal display according to an embodiment of the present invention; FIG. 4 is a schematic view showing a pixel driving circuit driving pixels on an odd-numbered gate line in an embodiment of the present invention;

Figure 5 is a schematic diagram of a gate drive circuit driving pixels on even-numbered gate lines in an embodiment of the present invention. detailed description

In the embodiment of the present invention, the pixel in the liquid crystal display uses a double-gate pixel structure, and the gate lines of each row are interlaced, that is, the pixels on the odd-numbered gate lines are driven first in one frame, and then completed. The pixels on the even-numbered row gate lines are driven, wherein in the process of driving the odd-numbered-row gate line pixels and the driving of the even-numbered-row gate line pixels, data driving signals of opposite polarities are respectively output.

A driving method of a liquid crystal display according to an embodiment of the present invention, the driving method of the liquid crystal display comprises: driving a pixel connected to an odd-numbered row gate line by an odd-numbered row gate line first, and then sequentially performing a gate line by an even number of rows Driving pixels connected to the even-numbered row gate lines; in the same frame picture, the data driving signals of the pixels connected to the odd-numbered row gate lines have the same polarity, and the data driving signals of the pixels connected to the even-numbered row gate lines The polarity of the data driving signal of the pixels connected to the odd-numbered row gate lines is opposite to the polarity of the data driving signals of the pixels connected to the even-numbered row gate lines.

Wherein, the polarity of the data driving signal is opposite when each pixel is in an odd frame picture and an even frame picture. Here, in the process of driving pixels connected to the odd-numbered row gate lines on an odd-numbered row gate line, the data driving circuit outputs a negative-polarity data driving signal on each data line; In the process of driving the pixels connected to the even-numbered row gate lines in line, the data driving circuit outputs a positive data driving signal on each of the data lines.

Another driving method of a liquid crystal display according to an embodiment of the present invention, the driving method of the liquid crystal display comprises: driving a pixel connected to an even-numbered row gate line by an even-numbered row of gate lines, and then an odd-numbered row of gate lines. Driving the pixels connected to the odd-numbered row gate lines; in the same frame picture, the data driving signals of the pixels connected to the odd-numbered row gate lines have the same polarity and are connected to the even-numbered row gate lines. The data driving signals of the pixels have the same polarity, and the polarity of the data driving signals of the pixels connected to the odd-numbered row gate lines is opposite to the polarity of the data driving signals of the pixels connected to the even-numbered row gate lines.

Wherein, the polarity of the data driving signal is opposite when each pixel is in an odd frame picture and an even frame picture. Here, in the process of driving pixels connected to the even-numbered row gate lines on the even-numbered row gate lines, the data driving circuit outputs a negative-polarity data driving signal on each of the data lines; In the process of driving the pixels connected to the odd-numbered row gate lines in line, the data driving circuit outputs a positive data driving signal on each of the data lines.

Correspondingly, the present invention further provides a liquid crystal display comprising a gate driving circuit, a data driving circuit and a plurality of pixel groups; wherein the gate driving circuit comprises a plurality of pairs of gate lines, each pair of gate lines comprising an odd number of rows a gate line and an even-numbered row gate line, the data driving circuit includes a plurality of data lines, each pixel group includes two adjacent pixels in a same row, each pixel includes a thin film transistor and a pixel electrode, all The pixels are arranged in a plurality of rows and columns, and the pixel electrodes of the two pixels in the same pixel group are respectively connected to the same data line through their corresponding thin film transistors and connected to different gate lines in the same pair of gate lines;

The data driving circuit is configured to output data driving signals of opposite polarities during an odd row gate line driving process and an even row gate line driving process of the gate driving circuit.

In the driving process of the liquid crystal display, the gate driving circuit drives the gate lines in an interlaced manner, that is, first drives the pixels on the odd-numbered row gate lines by odd-numbered rows of gate lines, and then evenly rows the gate lines. Driving pixels on even-numbered row gate lines, or driving even-numbered row-gate lines first by even-numbered rows of gate lines The upper pixel drives the pixels on the odd-numbered row gate lines by the odd-numbered row gate lines. In the process in which the gate driving circuit performs odd-numbered gate line driving, the data driving circuit outputs data driving signals of the same polarity on each data line. In the process in which the gate driving circuit performs the even-numbered row gate line driving, the data driving circuit outputs the data driving signals of the same polarity on the respective data lines. The data signal output by the data driving circuit during the driving process of the odd row gate lines is opposite to the polarity of the data signal output during the driving process of the even row gate lines.

For example, the gate driving signal outputted when the gate driving circuit intermittently drives the gate line is as shown in FIG. 1. By the gate driving signal, the odd-numbered row gate lines can be driven by the odd-numbered row gate lines. The pixels on G ₃ and G ₅ are further driven by the even-numbered row gate lines to the pixels on the even-numbered row gate lines G ₂ , G ₄ , G ₆ G _2n , where n is an integer greater than zero.

As shown in FIG. 2, the liquid crystal display in the embodiment of the present invention may include a gate driving circuit, a data driving circuit, and a pixel region. The gate driving circuit includes a plurality of gate lines G-Gs, and the gate driving circuit generates a gate. The pole drive signals S _G1 ~ S _G8 are respectively transmitted via the gate line GrG ₈ , and the data drive circuit includes a plurality of data lines D ^ D The data drive circuit generates the data signals S _{D1 -} S _D3 and transmits them via the data lines D ^ Ds respectively; Each of the gate lines is a line parallel to each other, and each of the data lines is also a line parallel to each other, and a plurality of pixels Pu^P^ in the pixel region are located at an interlaced position of the gate line and the data line, and each of the two gate lines and one line The data line defines one pixel group, the pixel group includes two pixels, the two pixels are located in one row and two columns and are connected to the same data line and different gate lines, for example, the pixel P ₂₃ and the pixel P _{24 in} FIG. 2 a pixel group, the pixel P _{23 is} connected to the data line D ₂ and the gate line G ₄ , and the pixel P _{24 is} connected to the data line D ₂ and the gate line G ₃ ; as shown in FIG. 2 , each pixel includes one Pixel electrode 1 and a thin film crystal (TFT) 2, the pixel electrode through the TFT 2 is connected a gate line and a data line. Specifically, the gate of the TFT 2 is connected to the gate line, and the drain or source of the TFT 2 is connected to the data line.

The gate driving circuit generates a gate driving signal S _G wide S _G8 as shown in FIG. 3 and outputs it via the gate line G^Gs, respectively, as shown in FIG. 4, first driving the odd-numbered rows in an odd-numbered row of gate lines. Pixels Pu, P ₁₃ , P ₁₅ , P ₂₂ , P ₂₄ , P ₂₆ , P ₃₁ , P ₃₃ , P ₃₅ , P ₄₂ , P ₄₄ , P ₄₆ on the gate lines, G ₃ , G ₅ , G ₇ , In this process, the data driving circuit generates a positive data driving signal and outputs it to the driven pixels via the data line D^Ds respectively; then, as shown in FIG. 5, the gate lines are driven to be connected to the even rows by the even-numbered rows. Pixels on the polar lines G ₂ , G ₄ , G ₆ , G ₈ ? ₁₂ , P ₁₄ , P ₁₆ , P ₂₁ , P ₂₃ ,

P25, P ₃ 2, P ₃ 4, P ₃₆ , P ₄ i, P43, P45. In this process, the data driving circuit generates a negative polarity data driving signal and outputs it to each driven pixel via the data line D^Ds.

In addition, when the display of the next frame is performed, the gate driving circuit generates a gate as shown in FIG. The pole drive signal S _G wide S _{G8 is} outputted via the gate line G wide G ₈ , respectively, and the pixel Pu connected to the odd row gate lines Gi, G ₃ , G ₅ , G ₇ is first driven by odd-numbered row gate lines , P ₁₃ , P ₁₅ , P ₂₂ , P ₂₄ , P26 , P ₃ i, P ₃ 3, P ₃ 5, P42, P44, P However, unlike the case shown in Fig. 4, the data driving circuit generates a negative polarity in this process. The data driving signals are output to the driven pixels via the data lines D^Ds, respectively. Next, the pixels connected to the even-numbered row gate lines G ₂ , G ₄ , G ₆ , G ₈ are driven by the even-numbered row gate lines. ₁₂ , P ₁₄ , P ₁₆ , P ₂₁ , P ₂₃ , P ₂₅ , P ₃₂ , P ₃₄ , P ₃₆ , P ₄₁ , P ₄₃ , P ₄₅ . However, unlike the case shown in FIG. 5, the data driving circuit generates a positive polarity data driving signal in this process and outputs it to the driven pixels via the data line D^Ds, respectively.

Alternatively, when performing display of the next frame picture, the gate driving circuit may first drive the pixels connected to the even-numbered row gate lines G ₂ , G ₄ , G ₆ , G ₈ by the even-numbered row gate lines. ₁₂ , P ₁₄ , P ₁₆ ,

P ₂ 1 , P23, P25, P ₃ 2, P ₃ 4, P ₃ 6 , P ₄ 1 , P ₄ 3, P ₄ 5 , and then drive connected to the odd-numbered row gate lines Gi by odd-numbered rows of gate lines Pixels P, P ₁₃ , P ₁₅ , P ₂₂ , P ₂₄ , P ₂₆ on G ₃ , G ₅ , G ₇ ,

P ₃ 1 , P ₃ 3, P ₃ 5, P42, P44, P460 Moreover, when driving the even-numbered row gate lines, the data driving circuit generates a positive-polarity data driving signal and outputs it to the image via the data line D^D ₃ Each of the driven pixels; when driving the odd-numbered row gate lines, the data driving circuit generates a negative-polarity data driving signal and outputs it to the driven pixels via the data lines D^Ds, respectively.

Here, in the above driving display process, the even-numbered row gate lines may be driven to drive the odd data driving signals, and the data driving circuit outputs the positive data driving signals when driving the even-numbered row gate lines, and only the data needs to be guaranteed. The polarity of the data driving signal output by the driving circuit during the odd-numbered gate line driving process is opposite to the polarity of the data driving signal outputted during the even-line gate line driving process. In the driving display process of such a frame, the polarity output of the data driving signal in the first half of the time is all positive (or negative), and the polarity output of the data driving signal in the second half is all negative (or positive), enabling each The pixel inversion is performed, and the Z-inversion of the double-gate pixel is realized, and the power consumption of the liquid crystal display is effectively reduced under the premise of ensuring high picture quality.

The above is only the preferred embodiment of the present invention and is not intended to limit the scope of the present invention.

Claims

claims

1. A driving method for a liquid crystal display, wherein the liquid crystal display includes a gate drive circuit, a data drive circuit and multiple pixel groups; the gate drive circuit includes multiple pairs of gate lines, and each pair of gate lines includes an odd-numbered row of gates. electrode line and an even-numbered row gate line, the data driving circuit includes multiple data lines, each pixel group includes two adjacent pixels located in the same row, each pixel includes a thin film transistor and a pixel electrode, and all pixels Arranged in multiple rows and columns, the pixel electrodes of two pixels in the same pixel group are connected to the same data line through their corresponding thin film transistors and connected to different gate lines in the same pair of gate lines;

The driving method of the liquid crystal display includes: first driving the pixels connected to the odd-numbered row gate lines by odd-numbered rows of gate lines, and then driving the pixels connected to the even-numbered rows of gate lines by even-numbered rows of gate lines; In the same frame, the data drive signals of pixels connected to the gate lines of odd rows have the same polarity, the data drive signals of pixels connected to the gate lines of even rows have the same polarity, and the data drive signals of pixels connected to the gate lines of odd rows have the same polarity. The data drive signal polarity of the pixel is opposite to the data drive signal polarity of the pixel connected to the even-numbered row gate line.

2. The driving method of the liquid crystal display according to claim 1, wherein the polarity of the data driving signal of each pixel is opposite in odd-numbered frames and even-numbered frames.

3. The driving method of the liquid crystal display according to claim 1, wherein,

In the process of driving the pixels connected to the odd-numbered row gate lines one by one, the data driving circuit outputs a negative polarity data driving signal on each data line;

In the process of driving the pixels connected to the even-numbered row gate lines one by one, the data driving circuit outputs a positive polarity data driving signal on each data line.

4. A driving method for a liquid crystal display, wherein the liquid crystal display includes a gate drive circuit, a data drive circuit and multiple pixel groups; wherein the gate drive circuit includes multiple pairs of gate lines, and each pair of gate lines includes an odd number. row gate lines and an even-numbered row gate line, the data driving circuit includes a plurality of data lines, each pixel group includes two adjacent pixels located in the same row, each pixel includes a thin film transistor and a pixel electrode, All pixels are arranged in multiple rows and columns, and the pixel electrodes of two pixels in the same pixel group are connected to the same data line through their corresponding thin film transistors and connected to different gate lines in the same pair of gate lines;

The driving method of the liquid crystal display includes: first driving the even-numbered row gate lines connected to the even-numbered rows. pixels on the odd-numbered row gate lines, and then drive the pixels connected to the odd-numbered row gate lines one by one; in the same frame, the data drive signal polarity of the pixels connected to the odd-numbered row gate lines The same, the data drive signal polarity of the pixels connected to the even-numbered row gate lines is the same, and the data drive signal polarity of the pixels connected to the odd-numbered row gate lines is the same as the data drive signal polarity of the pixels connected to the even-numbered row gate lines. The signal polarity is reversed.

5. The driving method of the liquid crystal display according to claim 4, wherein the polarity of the data driving signal of each pixel is opposite in odd-numbered frames and even-numbered frames.

6. The driving method of the liquid crystal display according to claim 4, wherein,

In the process of driving the pixels connected to the even-numbered row gate lines one by one, the data driving circuit outputs a negative polarity data driving signal on each data line;

In the process of driving the pixels connected to the odd-numbered row gate lines one by one, the data driving circuit outputs a positive polarity data driving signal on each data line.

7. A liquid crystal display, including a gate drive circuit, a data drive circuit and multiple pixel groups; wherein the gate drive circuit includes multiple pairs of gate lines, and each pair of gate lines includes an odd-numbered row of gate lines and an even-numbered row of gate lines. row gate lines, the data driving circuit includes multiple data lines, each pixel group includes two adjacent pixels located in the same row, each pixel includes a thin film transistor and a pixel electrode, and all pixels are in multiple rows and multiple Arranged in a column, the pixel electrodes of two pixels in the same pixel group are connected to the same data line through their corresponding thin film transistors and connected to different gate lines in the same pair of gate lines;

The gate driving circuit is used to first drive the pixels connected to the odd-numbered row gate lines by the odd-numbered rows of gate lines, and then drive the pixels connected to the even-numbered rows of gate lines by the even-numbered rows of gate lines; or , used to first drive the pixels connected to the even-numbered row gate lines one by one, and then drive the pixels connected to the odd-numbered rows' gate lines one by one.

In the same frame, the data drive signals of pixels connected to the gate lines of odd rows have the same polarity, and the data drive signals of pixels connected to the gate lines of even rows have the same polarity, and the data drive signals of pixels connected to the gate lines of odd rows have the same polarity. The polarity of the data drive signal of the pixel is opposite to that of the pixel connected to the even-numbered row gate line.

8. The liquid crystal display according to claim 7, wherein the polarity of the data driving signal of each pixel is opposite in odd-numbered frames and even-numbered frames.

9. The liquid crystal display according to claim 7, wherein,

The data driving circuit is used to drive the gate lines of odd rows in the gate driving circuit. During the process of connecting the pixels on the odd-numbered row gate lines, negative polarity data driving signals are output on each data line; in the gate driving circuit, the even-numbered row gate lines are driven by the even-numbered row gate lines. During the process of moving the pixels on, positive polarity data driving signals are output on each data line;

Or, in the process of the gate driving circuit driving the pixels connected to the even-numbered gate lines one by one, a negative polarity data driving signal is output on each data line; in the In the process of driving the pixels connected to the odd-numbered gate lines one by one, the gate driving circuit outputs a positive polarity data driving signal on each data line.