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

Patent metadata

Field	Value
Publication number	US-9966022-B2
Application number	US-201715442154-A
Country	US
Kind code	B2
Filing date	Feb 24, 2017
Priority date	Jan 27, 2015
Publication date	May 8, 2018
Grant date	May 8, 2018

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 device applied to an MVA (Multi-domain Vertical Alignment) wide viewing angle liquid crystal screen, the display device comprising:
a memory configured to store one or more computer readable program codes; and
one or more processors configured to execute the one or more computer readable program codes to:
obtain 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;
set pixels having same coordinates in the first frame and the second frame as respective groups of pixels, wherein each group of pixels comprises a first pixel in the first frame and a second pixel in the second frame;
adjust each group of pixels according to a following manner to obtain an adjusted first frame and an adjusted second frame:
determine an average gray-scale value of the first pixel and the second pixel; and
modify a first gray-scale value corresponding to the first pixel into a third gray-scale value, and modify 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, and 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; and
control 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 display device 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 display device according to claim 1 , wherein before control of 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 one or more processors are further configured to execute the one or more computer readable program codes to:
determine corresponding first light transmittance according to a preset first gamma value when the first pixel corresponds to the third gray-scale value, wherein the preset first gamma value is adopted by the first frame;
determine 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;
determine a double of a difference between the third light transmittance and the first light transmittance as a corresponding second light transmittance when the second pixel corresponds to the fourth gray-scale value; and
determine 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 display device according to claim 3 , wherein to control 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 one or more processors are further configured to execute the one or more computer readable program codes to:
determine 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 control 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; and
determine a corresponding gray-scale voltage according to the second gamma value, when the second pixel corresponds to the fourth gray-scale value, and control 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 display device according to claim 1 , wherein to obtain a first frame and a second frame to be displayed, the one or more processors are further configured to execute the one or more computer readable program codes to:
group all obtained frames to be displayed into groups of frames, wherein each group of the groups of frames only comprises the first frame and the second frame which are adjacent in the display order, and frames contained in each group of the groups of frames are different from frames contained in other groups of the groups of frames.

6. A display device applied to an MVA (Multi-domain Vertical Alignment) wide viewing angle liquid crystal screen, the display device comprising:
a memory configured to store one or more computer readable program codes; and
one or more processors configured to execute the one or more computer readable program codes to:
obtain 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;
determine gray-scale voltage of each pixel in the first frame according to a preset first gamma value, and determine gray-scale voltage of each pixel in the second frame according to a second gamma value, wherein the preset gamma value is adopted by the first frame, the second gamma value is determined via the preset first gamma value and adopted by the second frame, and the first gamma value is different from the second gamma value; and
control 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 display device according to claim 6 , wherein the one or more processors are further configured to execute the one or more computer readable program codes to:
obtain 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;
determine gray-scale voltage of each pixel in the third frame according to the second gamma value, and determine gray-scale voltage of each pixel in the fourth frame according to the first gamma value; and
control 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 device applied to an MVA (Multi-domain Vertical Alignment) wide viewing angle liquid crystal screen, the display device comprising:
a memory configured to store one or more computer readable program codes; and
one or more processors configured to execute the one or more computer readable program codes to:
obtain 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;
divide the first frame into a plurality of first pixel groups, and divide 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 coordinates of pixels in the second pixel groups correspond to coordinates of the pixels in the first pixel groups in a one-to-one correspondence;
adjust gray-scale values of the pixels in the first pixel gr

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

• 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

• G09G2340/16

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

• G09G2320/0276

  for the purpose of adaptation to the characteristics of a display device, i.e. gamma correction · CPC title