Display method and display device applied to MVA wide viewing angle liquid crystal screen

Patent metadata

Field	Value
Publication number	US-9626919-B2
Application number	US-201514789268-A
Country	US
Kind code	B2
Filing date	Jul 1, 2015
Priority date	Jan 27, 2015
Publication date	Apr 18, 2017
Grant date	Apr 18, 2017

Abstract

According to the method provided by some embodiments of the present disclosure, under different gray-scale voltages, the liquid crystal deflection directions of liquid crystal molecules are different, such that when a first frame is displayed, the deflection difference between the deflection direction of the liquid crystal molecules in the pixel structure in the liquid crystal display screen and the deflection direction when a second frame is displayed is increased, after human eyes view the displayed first frame and second frame, an image obtained after the first frame and the second frame are displayed may be observed at different viewing angles, and at this time, the viewing angle of the liquid crystal display screen is increased on the premise of not increasing the number of sub-domains in the pixel structure of the liquid crystal display screen.

First claim

The invention claimed is:

1. A display method applied to an MVA (Multi-domain Vertical Alignment) wide angle liquid crystal screen, comprising:
obtaining a first frame and a second frame to be displayed, wherein the first frame and the second frame are two frames which are adjacent in a display order;
setting pixels having the same coordinates in the first frame and the second frame as a group of pixels, wherein each group of pixels comprises a first pixel in the first frame and a second pixel in the second frame;
adjusting each group of pixels according to the following manner to obtain an adjusted first frame and an adjusted second frame:
determining an average gray-scale value of the first pixel and the second pixel; modifying a first gray-scale value corresponding to the first pixel into a third gray-scale value, and modifying a second gray-scale value corresponding to the second pixel into a fourth gray-scale value, wherein when the third gray-scale value is larger than the average gray-scale value, the fourth gray-scale value is smaller than the average gray-scale value; when the third gray-scale value is smaller than the average gray-scale value, the fourth gray-scale value is larger than the average gray-scale value;
controlling the MVA wide viewing angle liquid crystal screen to display the adjusted first frame and the adjusted second frame according to the display order.

2. The method according to claim 1 , wherein an average gray-scale value of the third gray-scale value corresponding to the first pixel and the fourth gray-scale value corresponding to the second pixel is equal to the average gray-scale value of the first gray-scale value corresponding to the first pixel and the second gray-scale value corresponding to the second pixel.

3. The method according to claim 1 , wherein before the controlling the MVA wide viewing angle liquid crystal screen to display the adjusted first frame and the adjusted second frame according to the display order, the method further comprises:
determining corresponding first light transmittance according to a first gamma value when the first pixel corresponds to the third gray-scale value, wherein the first frame is a preset first gamma value adopted by the first frame;
determining third light transmittance corresponding to the average gray-scale value of the first gray-scale value corresponding to the first pixel and the second gray-scale value corresponding to the second pixel according to a preset third gamma value;
determining the double of a difference between the third light transmittance and the first light transmittance as the corresponding second light transmittance when the second pixel corresponds to the fourth gray-scale value;
determining a corresponding second gamma value, according to the second light transmittance and the fourth gray-scale value corresponding to the second pixel, when the second pixel corresponds to the fourth gray-scale value.

4. The method according to claim 3 , wherein the controlling the MVA wide viewing angle liquid crystal screen to display the adjusted first frame and the adjusted second frame according to the display order, comprises:
determining a corresponding gray-scale voltage according to the first gamma value, when the first pixel in the first frame corresponds to the third gray-scale value, and controlling the MVA wide viewing angle liquid crystal screen to display the first frame according to the gray-scale voltage, when the first pixel corresponds to the third gray-scale value;
determining a corresponding gray-scale voltage, according to the second gamma value when the second pixel corresponds to the fourth gray-scale value, and controlling the MVA wide viewing angle liquid crystal screen to display the second frame, according to the gray-scale voltage when the second pixel corresponds to the fourth gray-scale value.

5. The method according to claim 1 , wherein the obtaining a first frame and a second frame to be displayed, wherein the first frame and the second frame are two frames which are adjacent in the display order, comprises:
grouping all obtained frames to be displayed, wherein each group of frames only comprises the first frame and the second frame which are adjacent in the display order, and the frames contained in any group of frames are different from the frames contained in other groups of frames.

6. A display method applied to an MVA wide viewing angle liquid crystal screen, comprising:
obtaining a first frame and a second frame to be displayed, wherein the first frame and the second frame are two frames which are adjacent in the display order;
determining gray-scale voltage of each pixel in the first frame according to a first gamma value, and determining gray-scale voltage of each pixel in the second frame according to a second gamma value, wherein the first gamma value is a preset gamma value adopted by the first frame, the second gamma value is a gamma value determined via the first gamma value and adopted for the display of the second frame, and the first gamma value is different from the second gamma value;
controlling the MVA wide viewing angle liquid crystal screen to display the first frame according to the gray-scale voltage of each pixel in the first frame and then display the second frame according to the gray-scale voltage of each pixel in the second frame.

7. The method according to claim 6 , further comprising:
obtaining a third frame and a fourth frame to be displayed, wherein the third frame and the fourth frame are two frames which are adjacent in the display order and are displayed after the second frame;
determining gray-scale voltage of each pixel in the third frame according to the second gamma value, and determining gray-scale voltage of each pixel in the fourth frame according to the first gamma value;
controlling the MVA wide viewing angle liquid crystal screen to display the third frame according to the gray-scale voltage of each pixel in the third frame and then display the fourth frame according to the gray-scale voltage of each pixel in the fourth frame.

8. A display method applied to an MVA wide viewing angle liquid crystal screen, comprising:
obtaining a first frame and a second frame to be displayed, wherein the first frame and the second frame are two frames which are adjacent in the display order;
dividing the first frame into a plurality of first pixel groups, and dividing the second frame into a plurality of second pixel groups, wherein each first pixel group comprises at least two adjacent pixels, the pixels contained in each first pixel group are different, and the coordinates of the pixels in the second pixel groups correspond to the coordinates of the pixels in the first pixel groups in a one-to-one correspondence;
adjusting gray-scale values of the pixels in the first pixel groups and corresponding second pixel groups according to the following manner to obtain the adjusted first frame and the adjusted second frame:
determining a first gray-scale value corresponding to the first pixel in the first pixel group and a second gray-scale value corresponding to the second pixel in the first pixel group, and determining a first average gray-scale value according to the first gray-scale value and the second gray-scale value;
modifying the first gray-scale value corresponding to the first pixel in the first pixel group into a third gray-scale value, and modifying the second gray-scale value corresponding to the second pixel into a fourth gray-scale value, wherein the third gray-scale value is larger than the first average gray-scale value, and the fourth gray-scale value is smaller than the first average gray-scale value;
determining a fifth gray-scale value corresponding to a third pixel in the second

Assignees

• Hisense Electric Co Ltd
• Hisense Usa Corp
• Hisense Int Co Ltd

Inventors

• Cao Jianwei
• Huang Shunming
• Liu Weidong

Classifications

• G09G3/2007

  Display of intermediate tones · CPC title

• G09G2340/16

  Determination of a pixel data signal depending on the signal applied in the previous frame · CPC title

• G09G2320/0673

  for control of gamma adjustment, e.g. selecting another gamma curve · CPC title

• G09G2300/0465

  Improved aperture ratio, e.g. by size reduction of the pixel circuit, e.g. for improving the pixel density or the maximum displayable luminance or brightness · CPC title

• G09G2300/0447

  for multi-domain technique to improve the viewing angle in a liquid crystal display, such as multi-vertical alignment [MVA] · CPC title