LIQUID CRYSTAL DISPLAY AND METHOD FOR DRIVING SAME

• US 20190311685A1
• Filed: 12/26/2017
• Published: 10/10/2019
• Est. Priority Date: 12/27/2016
• Status: Abandoned Application

• Current Assignee: Chongqing HKC Optoelectronics Technology Co., Ltd. (Shenzhen Huike Investment Holding Co., Ltd.), HKC Corporation Limited (Shenzhen Huike Investment Holding Co., Ltd.)
• Original Assignee: HKC Corporation Limited (Shenzhen Huike Investment Holding Co., Ltd.)
• Inventors: Chen, Yu-Jen
• Application Number:
  US16/309,025
• Publication Number:
  US 20190311685A1
• Time in Patent Office: Days
• CPC Class Codes: G02F 1/13306 Circuit arrangements or driving methods for the control of single liquid crystal cells G02F1/132, G02F1/133382 take precedence
• CPC Class Codes: G02F 1/133308 Support structures for LCD panels, e.g. frames or bezels
• CPC Class Codes: G02F 1/133514 Colour filters
• CPC Class Codes: G02F 1/133601 for spatial active dimming
• CPC Class Codes: G02F 1/133611 including means for improving the brightness uniformity
• CPC Class Codes: G02F 1/133753 with different alignment orientations or pretilt angles on a same surface, e.g. for grey scale or improved viewing angle
• CPC Class Codes: G02F 1/13452 Conductors connecting driver circuitry and terminals of panels
• CPC Class Codes: G02F 1/1362 Active matrix addressed cells G02F1/134336, G02F1/134363 take precedence
• CPC Class Codes: G02F 1/136286 Wiring, e.g. gate line, drain line
• CPC Class Codes: G02F 1/1368 in which the switching element is a three-electrode device G02F1/136277 takes precedence
• CPC Class Codes: G02F 2201/52 RGB geometrical arrangements
• CPC Class Codes: G09G 2310/0254 Control of polarity reversal in general, other than for liquid crystal displays
• CPC Class Codes: G09G 2320/0233 Improving the luminance or brightness uniformity across the screen
• CPC Class Codes: G09G 2320/0242 Compensation of deficiencies in the appearance of colours
• CPC Class Codes: G09G 2320/0247 Flicker reduction other than flicker reduction circuits used for single beam cathode-ray tubes
• CPC Class Codes: G09G 2320/0261 in the context of movement of objects on the screen or movement of the observer relative to the screen
• CPC Class Codes: G09G 2320/0285 using tables for spatial correction of display data
• CPC Class Codes: G09G 2320/062 Adjustment of illumination source parameters
• CPC Class Codes: G09G 2320/0626 for control of overall brightness
• CPC Class Codes: G09G 2320/0646 Modulation of illumination source brightness and image signal correlated to each other
• CPC Class Codes: G09G 2320/0653 : Controlling or limiting the speed of brightness adjustment of the illumination source
• CPC Class Codes: G09G 2320/0666 : for control of colour parameters, e.g. colour temperature
• CPC Class Codes: G09G 2320/068 : for control of viewing angle adjustment
• CPC Class Codes: G09G 2320/0686 : with two or more screen areas displaying information with different brightness or colours
• CPC Class Codes: G09G 2340/16 : Determination of a pixel data signal depending on the signal applied in the previous frame
• CPC Class Codes: G09G 3/3406 : Control of illumination source illumination devices structurally associated with liquid crystal cells G02F1/1336
• CPC Class Codes: G09G 3/3426 : the different display panel areas being distributed in two dimensions, e.g. matrix
• CPC Class Codes: G09G 3/3607 : for displaying colours or for displaying grey scales with a specific pixel layout, e.g. using sub-pixels display of colours in flat matrix panels other than liquid crystal displays G09G3/2003; grey scales specific for television H04N3/127
• CPC Class Codes: G09G 3/3611 : Control of matrices with row and column drivers
• CPC Class Codes: G09G 3/3614 : Control of polarity reversal in general
• CPC Class Codes: G09G 3/3644 : with the matrix divided into sections
• CPC Class Codes: G09G 3/3648 : using an active matrix G09G3/367 - G09G3/3696 take precedence
• CPC Class Codes: G09G 3/3666 : with the matrix divided into sections
• CPC Class Codes: G09G 3/367 : with a nonlinear element in series with the liquid crystal cell, e.g. a diode, or M.I.M. element
• CPC Class Codes: G09G 3/3677 : suitable for active matrices only

Abstract

A liquid crystal display, comprising a liquid crystal panel (10) and a driving module (20). The liquid crystal panel (10) comprises a plurality of liquid crystal pixels arranged in an array. The liquid crystal display is configured to display a same picture in two adjacent frames. The driving module (20) is used for respectively providing different pixel voltages of the same polarity to each liquid crystal pixel in two adjacent frames to deflect liquid crystal molecules of the liquid crystal pixel, wherein in each of the two adjacent frames, the pixel voltage of each liquid crystal pixel is different from pixel voltages of liquid crystal pixels which are spaced apart from the liquid crystal pixel by one pixel along a first direction, a second direction, a third direction, and a fourth direction. Also provided is a method for driving the liquid crystal display.

Claims

1. A liquid crystal display, comprising:

a liquid crystal panel comprising a plurality of liquid crystal pixels and configured to display the same image in two adjacent frames; and

a driving module configured to respectively provide different pixel voltages of the same polarity for each of the liquid crystal pixels in the two adjacent frames, so as to deflect liquid crystal molecules of each of the liquid crystal pixels;

wherein in each frame of the two adjacent frames, the pixel voltage of each liquid crystal pixel is different from pixel voltages of liquid crystal pixels spaced by one pixel from the liquid crystal pixel along a first direction, a second direction, a third direction, and a fourth direction.

2. The liquid crystal display of claim 1, wherein the liquid crystal display further comprises a backlight module, the liquid crystal panel is divided into M×

N rectangular panel partitions, the backlight module is divided into M×

N rectangular backlight partitions, 1≤

i≤

M, 1≤

j≤

N, and the rectangular panel partition of the i-th row and the j-th column corresponds to the rectangular backlight partition of the i-th row and the j-th column;

in each frame of the two adjacent frames, after the liquid crystal molecules of each liquid crystal pixel in each of the rectangular panel partitions are deflected, the driving module is configured to drive all of the rectangular backlight partitions to emit light at the same time.

3. The liquid crystal display of claim 1, wherein the liquid crystal display further comprises a backlight module, the liquid crystal panel is divided into M×

N rectangular panel partitions, the backlight module is divided into M×

N rectangular backlight partitions, 1≤

i≤

M, 1≤

j≤

N, and the rectangular panel partition of the i-th row and the j-th column corresponds to the rectangular backlight partition of the i-th row and the j-th column;

in each frame of the two adjacent frames, after the liquid crystal molecules of each liquid crystal pixel in the rectangular panel partition of the i-th row and j-th column are deflected, the driving module is further configured to drive the rectangular backlight partition of the i-th row and j-th column to emit light, until all of the rectangular backlight partitions are driven to emit light.

4. The liquid crystal display of claim 2, wherein a sum of the pixel voltages of all the liquid crystal pixels in the rectangular panel partition of the i-th row and j-th column and luminance of the rectangular backlight partition of the i-th row and j-th column satisfy the following formula 1,

L_{ij_1}*V_{ij_1}=L_{ij_2}*V_{ij_2} 

 

[Formula 1]

wherein L_{ij_1} denotes the luminance of the rectangular backlight partition of the i-th row and the j-th column in a previous frame of two adjacent frames, V_{ij_1} denotes the sum of the pixel voltages of all the liquid crystal pixels in the rectangular panel partition of the i-th row and the j-th column in the previous frame of the two adjacent frames, L_{ij_2} denotes the luminance of the rectangular backlight partition of the i-th row and the j-th column in a subsequent frame of two adjacent frames, V_{ij_2} denotes the sum of the pixel voltages of all the liquid crystal pixels in the rectangular panel partition of the i-th row and the j-th column in the subsequent frame of the two adjacent frames.

5. The liquid crystal display of claim 2, wherein a sum of the pixel voltages of the liquid crystal pixels in the rectangular panel partition of the i-th row and j-th column and luminance of the rectangular backlight partition of the i-th row and j-th column satisfy the following formula 2,

L_{ij_1}*V_{ij_1}+L_{ij_2}*V_{ij_2}=2*L_ij*V_ij 

 

[Formula 2]

wherein Lij denotes the luminance of the rectangular backlight partition of the i-th row and j-th column when the liquid crystal display is configured to display the image only in one frame, V_ij denotes the sum of the pixel voltages of all the liquid crystal pixels in the rectangular panel partition when the liquid crystal display is configured to display the image only in one frame, L_{ij_1} denotes the luminance of the rectangular backlight partition of the i-th row and the j-th column in a previous frame of two adjacent frames, V_{ij_1} denotes the sum of the pixel voltages of all the liquid crystal pixels in the rectangular panel partition of the i-th row and the j-th column in a previous frame of the two adjacent frames, L_{ij_2} denotes the luminance of the rectangular backlight partition of the i-th row and the j-th column in the subsequent frame of two adjacent frames, V_{ij_2} denotes the sum of the pixel voltages of all the liquid crystal pixels in the rectangular panel partition of the i-th row and the j-th column in the subsequent frame of the two adjacent frames.

6. The liquid crystal display of claim 4, wherein a sum of the pixel voltages of all the liquid crystal pixels in the rectangular panel partition of the i-th row and j-th column and luminance of the rectangular backlight partition of the i-th row and j-th column satisfy the following formula 2,

L_{ij_1}*V_{ij_1}+L_{ij_2}*V_{ij_2}=2*L_ij*V_ij 

 

[Formula 2]

wherein L_ij denotes the luminance of the rectangular backlight partition of the i-th row and j-th column when the liquid crystal display is configured to display the image only in one frame, V_ij denotes the sum of the pixel voltages of the liquid crystal pixels in the rectangular panel partition when the liquid crystal display is configured to display the image only in one frame.

7. A driving method for a liquid crystal display, comprising:

providing, by a driving module, a pixel voltage to each of liquid crystal pixels of a liquid crystal panel in a previous frame of two adjacent frames, so as to deflect all liquid crystal molecules of each of the liquid crystal pixels, wherein the liquid crystal panel is configured to display the same image in the two adjacent frames; and

in a subsequent frame of the two adjacent frames, providing, by the driving module, a pixel voltage to each of the liquid crystal pixels of the liquid crystal panel, so as to deflect all liquid crystal molecules of each of the liquid crystal pixels,

wherein the pixel voltage of each liquid crystal pixel is different from pixel voltages of liquid crystal pixels spaced by one pixel from the liquid crystal pixel along a first direction, a second direction, a third direction and a fourth direction, and the pixel voltages of the same liquid crystal pixel in the previous frame and in the subsequent frame have the same polarity but are different in values.

8. The driving method for the liquid crystal display of claim 7, wherein the liquid crystal display further comprises a backlight module, wherein the liquid crystal panel is divided into M×

N rectangular panel partitions, the backlight module is divided into M×

N rectangular backlight partitions, 1≤

i≤

M, 1≤

j≤

N, and the rectangular panel partition of the i-th row and the j-th column corresponds to the rectangular backlight partition of the i-th row and the j-th column,

wherein the driving method for the liquid crystal display further comprises;

in the previous frame of the two adjacent frames, after the liquid crystal molecules of each liquid crystal pixel in each of the rectangular panel partitions are deflected, driving, by the driving module, all of the rectangular backlight partitions to emit light at the same time, and

in the subsequent frame of the two adjacent frames, after the liquid crystal molecules of each liquid crystal pixel in each of the rectangular panel partitions are deflected, driving, by the driving module drives, all of the rectangular backlight partitions to emit light at the same time.

9. The driving method for the liquid crystal display of claim 7, wherein the liquid crystal display further comprises a backlight module, the liquid crystal panel is divided into M×

N rectangular panel partitions, the backlight module is divided into M×

N rectangular backlight partitions, 1≤

i≤

M, 1≤

j≤

N, and the rectangular panel partition of the i-th row and the j-th column corresponds to the rectangular backlight partition of the i-th row and the j-th column,

wherein the driving method for the liquid crystal display further comprises;

in the previous frame of the two adjacent frames, after the liquid crystal molecules of each liquid crystal pixel in the rectangular panel partition of the i-th row and j-th column are deflected, driving, by the driving module, the rectangular backlight partition of the i-th row and j-th column to emit light, until all of the rectangular backlight partitions are driven to emit light, and

in the subsequent frame of the two adjacent frames, after the liquid crystal molecules of each liquid crystal pixel in the rectangular panel partition of the i-th row and j-th column are deflected, driving, by the driving module, the rectangular backlight partition of the i-th row and j-th column to emit light, until all of the rectangular backlight partitions are driven to emit light.

10. The driving method for the liquid crystal display of claim 8, wherein a sum of the pixel voltages of all the liquid crystal pixels in the rectangular panel partition of the i-th row and j-th column and luminance of the rectangular backlight partition of the i-th row and j-th column satisfy the formula 1 and/or the formula 2 as following,

L_{ij_1}*V_{ij_1}=L_{ij_2}*V_{ij_2} 

 

[Formula 1]

L_{ij_1}*V_{ij_1}+L_{ij_2}*V_{ij_2}=2*L_ij*V_ij 

 

[Formula 2]

wherein, L_{ij_1} denotes the luminance of the rectangular backlight partition of the i-th row and the j-th column in the previous frame of two adjacent frames, V_{ij_1} denotes the sum of the pixel voltages of all the liquid crystal pixels in the rectangular panel partition of the i-th row and the j-th column in the previous frame of the two adjacent frames, L_{ij_2} denotes the luminance of the rectangular backlight partition of the i-th row and the j-th column in the subsequent frame of two adjacent frames, V_{ij_2} denotes the sum of the pixel voltages of all the liquid crystal pixels in the rectangular panel partition of the i-th row and the j-th column in the subsequent frame of the two adjacent frames, L_ij denotes the luminance of the rectangular backlight partition of the i-th row and j-th column when the liquid crystal display is configured to display the image only in one frame, and V_ij denotes the sum of the pixel voltages of all the liquid crystal pixels in the rectangular panel partition when the liquid crystal display is configured to display the image only in one frame.

11. A liquid crystal display, comprising:

a liquid crystal panel comprising a plurality of liquid crystal pixels and configured to display the same image in two adjacent frames;

a driving module configured to respectively provide different pixel voltages of the same polarity for each of the liquid crystal pixels in two adjacent frames, so as to deflect liquid crystal molecules of each of the liquid crystal pixels;

wherein in each frame of the two adjacent frames, a pixel voltage of each liquid crystal pixel is associated with a pixel voltage of each of liquid crystal pixels in a pixel interval, from which the liquid crystal pixel is spaced by a plurality of pixel distances along a first direction, a second direction, a third direction, and a fourth direction, by an association relationship.

12. The liquid crystal display of claim 11, wherein the association relationship is that:

the pixel voltage of each liquid crystal pixel is different from the pixel voltage of each of the liquid crystal pixels in the pixel interval, from which the liquid crystal pixel is spaced by a plurality of pixel distances along the first direction, the second direction, the third direction, and the fourth direction.

13. The liquid crystal display of claim 11, wherein the association relationship is that the pixel voltage of each liquid crystal pixel is different from a pixel voltage of a upper liquid crystal pixel spaced by one pixel.

14. The liquid crystal display of claim 11, wherein the liquid crystal display further comprises a backlight module, the liquid crystal panel is divided into M×

N rectangular panel partitions, the backlight module is divided into M×

N rectangular backlight partitions, 1≤

i≤

M, 1≤

j≤

N, and the rectangular panel partition of the i-th row and the j-th column corresponds to the rectangular backlight partition of the i-th row and the j-th column;

in each frame of the two adjacent frames, after the liquid crystal molecules of each liquid crystal pixel in each of the rectangular panel partitions are deflected, the driving module is further configured to drive all of the rectangular backlight partitions to emit light at the same time

15. The liquid crystal display of claim 11, wherein the liquid crystal display further comprises a backlight module, the liquid panel is divided into M×

N rectangular panel partitions, the backlight module is divided into M×

N rectangular backlight partitions, 1≤

i≤

M, 1≤

j≤

N, and the rectangular panel partition of the i-th row and the j-th column corresponds to the rectangular backlight partition of the i-th row and the j-th column;

in each frame of the two adjacent frames, after the liquid crystal molecules of each liquid crystal pixel in the rectangular panel partition of the i-th row and j-th column are deflected, the driving module is further configured to drive the rectangular backlight partition of the i-th row and j-th column to emit light, until all of the rectangular backlight partitions are driven to emit light.

16. The liquid crystal display of claim 14, wherein a sum of the pixel voltages of all the liquid crystal pixels in the rectangular panel partition of the i-th row and j-th column and luminance of the rectangular backlight partition of the i-th row and j-th column satisfy the following formula 1,

L_{ij_1}*V_{ij_1}=L_{ij_2}*V_{ij_2} 

 

[Formula 1]

wherein, L_{ij_1} denotes the luminance of the rectangular backlight partition of the i-th row and the j-th column in the previous frame of two adjacent frames, V_{ij_1} denotes the sum of the pixel voltages of all the liquid crystal pixels in the rectangular panel partition of the i-th row and the j-th column in the previous frame of the two adjacent frames, L_{ij_2} denotes the luminance of the rectangular backlight partition of the i-th row and the j-th column in the subsequent frame of two adjacent frames, V_{ij_2} denotes the sum of the pixel voltages of all the liquid crystal pixels in the rectangular panel partition of the i-th row and the j-th column in the subsequent frame of the two adjacent frames.

17. The liquid crystal display of claim 15, wherein a sum of the pixel voltages of all the liquid crystal pixels in the rectangular panel partition of the i-th row and j-th column and luminance of the rectangular backlight partition of the i-th row and j-th column satisfy the following formula 1,

L_{ij_1}*V_{ij_1}=L_{ij_2}*V_{ij_2} 

 

[Formula 1]

wherein L_{ij_1} denotes the luminance of the rectangular backlight partition of the i-th row and the j-th column in a previous frame of two adjacent frames, V_{ij_1} denotes the sum of the pixel voltages of all the liquid crystal pixels in the rectangular panel partition of the i-th row and the j-th column in the previous frame of the two adjacent frames, L_{ij_2} denotes the luminance of the rectangular backlight partition of the i-th row and the j-th column in a subsequent frame of two adjacent frames, V_{ij_2} denotes the sum of the pixel voltages of all the liquid crystal pixels in the rectangular panel partition of the i-th row and the j-th column in the subsequent frame of the two adjacent frames.

18. The liquid crystal display of claim 14, wherein a sum of the pixel voltages of all the liquid crystal pixels in the rectangular panel partition of the i-th row and j-th column and luminance of the rectangular backlight partition of the i-th row and j-th column satisfy the following formula 2,

L_{ij_1}*V_{ij_1}+L_{ij_2}*V_{ij_2}=2*L_ij*V_ij 

 

[Formula 2]

wherein L_ij denotes the luminance of the rectangular backlight partition of the i-th row and j-th column when the liquid crystal display is configured to display the image only in one frame, V_ij denotes the sum of the pixel voltages of all the liquid crystal pixels in the rectangular panel partition when the liquid crystal display is configured to display the image only in one frame, L_{ij_1} denotes the luminance of the rectangular backlight partition of the i-th row and the j-th column in a previous frame of two adjacent frames, V_{ij_1} denotes the sum of all the pixel voltages of the liquid crystal pixels in the rectangular panel partition of the i-th row and the j-th column in the previous frame of the two adjacent frames, L_{ij_2} denotes the luminance of the rectangular backlight partition of the i-th row and the j-th column in a subsequent frame of two adjacent frames, V_{ij_2} denotes the sum of the pixel voltages of all the liquid crystal pixels in the rectangular panel partition of the i-th row and the j-th column in the subsequent frame of the two adjacent frames.

19. The liquid crystal display of claim 15, wherein a sum of the pixel voltages of all the liquid crystal pixels in the rectangular panel partition of the i-th row and j-th column and luminance of the rectangular backlight partition of the i-th row and j-th column satisfy the following formula 2,

Li_{ij_1}*V_{ij_1}+L_{ij_2}*V_{ij_2}=2*L_ij*V_ij 

 

[Formula 2]

wherein L_ij denotes the luminance of the rectangular backlight partition of the i-th row and j-th column when the liquid crystal display is configured to display the image only in one frame, and V_ij denotes the sum of all the pixel voltages of the liquid crystal pixels in the rectangular panel partition when the liquid crystal display is configured to display the image only in one frame, L_{ij_1} denotes the luminance of the rectangular backlight partition of the i-th row and the j-th column in a previous frame of two adjacent frames, V_{ij_1} denotes the sum of all the pixel voltages of the liquid crystal pixels in the rectangular panel partition of the i-th row and the j-th column in the previous frame of the two adjacent frames, L_{ij_2} denotes the luminance of the rectangular backlight partition of the i-th row and the j-th column in a subsequent frame of two adjacent frames, V_{ij_2} denotes the sum of the pixel voltages of all the liquid crystal pixels in the rectangular panel partition of the i-th row and the j-th column in the subsequent frame of the two adjacent frames.

20. The liquid crystal display of claim 16, wherein the sum of the pixel voltages of all the liquid crystal pixels in the rectangular panel partition of the i-th row and j-th column and the luminance of the rectangular backlight partition of the i-th row and j-th column satisfy the following formula 2,

L_{ij_1}*V_{ij_1}+L_{ij_2}*V_{ij_2}=2*L_ij*V_ij 

 

[Formula 2]

wherein, L_ij denotes the luminance of the rectangular backlight partition of the i-th row and j-th column when the liquid crystal display is configured to display the image only in one frame, and V_ij denotes the sum of the pixel voltages of the liquid crystal pixels in the rectangular panel partition when the liquid crystal display is configured to display the image only in one frame.