Liquid crystal display device

• US 10,692,446 B2
• Filed: 12/16/2017
• Issued: 06/23/2020
• Est. Priority Date: 12/27/2016
• Status: Active Grant

• 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
• Primary Examiner(s): Shankar, Vijay
• Application Number:
  US16/087,507
• Publication Number:
  US 20190108801A1
• Time in Patent Office: 920 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 device includes a liquid crystal panel including a plurality of liquid crystal pixels, wherein the liquid crystal panel is configured to display a same picture in two adjacent frames; a driving module disposed on the non-display area, wherein the driving module is used to respectively provide each liquid crystal pixel with a same polarity pixel voltage of different levels in the two adjacent frames so as to deflect liquid crystal molecules of each liquid crystal pixel, and in each frame of the two adjacent frames, the level of the pixel voltage of each liquid crystal pixel is different from the level of the pixel voltage of the adjacent liquid crystal pixels in front, back, left or right.

Claims

1. A liquid crystal display device, comprising:

a liquid crystal panel, comprising a plurality of liquid crystal pixels, wherein the liquid crystal panel is configured to display a same picture in two adjacent frames, the liquid crystal panel further comprises a display area and a non-display area surrounding the display area, and the display area is provided with a transistor array substrate;

a driving module disposed on the non-display area, wherein the driving module is used to respectively provide each liquid crystal pixel with a same polarity pixel voltage of different levels in the two adjacent frames so as to deflect liquid crystal molecules of each liquid crystal pixel, and in each frame of the two adjacent frames, the level of the pixel voltage of each liquid crystal pixel is different from the level of the pixel voltage of the adjacent liquid crystal pixels in front, back, left or right;

wherein the non-display area is provided with a source control chip and a gate control chip, the source control chip is electrically connected to source electrodes of the transistors in the transistor array substrate through data lines, the gate control chip is electrically connected with gate electrodes of the transistors through scan lines, and the source control chip and the gate control chip are located at a same side of the display area.

2. The liquid crystal display device according to claim 1, wherein the liquid crystal display device 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, the rectangular panel partition of row i and column j corresponds to the rectangular backlight partition of row i and column j;

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

3. The liquid crystal display device according to claim 1, wherein the liquid crystal display device further comprises 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, 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 two adjacent frames, after the liquid crystal molecules of each liquid crystal pixel in the rectangular panel partition of the i-th row and the j-th column are deflected, the driving module is further configured to drive the rectangle backlight partition of the i-th row and the j-th column to emit light, till all the rectangular backlight partition are driven to emit light.

4. The liquid crystal display device according to claim 2, wherein 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 and luminance of the rectangular backlight partition in the jth column of the i-th row satisfy the following formula 1,

Lij_1*Vij_1=Lij_2*Vij_2, 

 

[formula 1]

wherein Lij_1 represents the luminance of the rectangular backlight partition in the i-th row and j-th column in the previous frame of two adjacent frames, Vij_1 represents 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 in the previous frame of the two adjacent frames, Lij_2 represents the luminance of the rectangular backlight partition of the i-th row and j-th column in the latter frame of two adjacent frames, Vij_2 represents 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 in the latter frame of the two adjacent frames.

5. The liquid crystal display device according to claim 3, wherein 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 and luminance of the rectangular backlight partition in the jth column of the i-th row satisfy the following formula 1,

Lij_1*Vij_1=Lij_2*Vij_2, 

 

[formula 1]

wherein Lij_1 represents the luminance of the rectangular backlight partition in the i-th row and j-th column in the previous frame of two adjacent frames, Vij_1 represents 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 in the previous frame of the two adjacent frames, Lij_2 represents the luminance of the rectangular backlight partition of the i-th row and j-th column in the latter frame of two adjacent frames, Vij_2 represents 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 in the latter frame of the two adjacent frames.

6. The liquid crystal display device according to claim 2, wherein 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 and luminance of the rectangular backlight partition in the jth column of the i-th row satisfy the following formula 2,

Lij_1*Vij_1+Lij_2*Vij_2=2*Lij*Vij, 

 

[formula 2]

wherein Lij represents the luminance of the rectangular backlight partition of the ith row and the jth column when the liquid crystal display is set to display the picture in only one frame, Vij represents the sum of the pixel voltages of all the liquid crystal pixels in the rectangular panel partition when the liquid crystal display is set to display the picture in only one frame, Lij_1 represents the luminance of the rectangular backlight partition in the i-th row and j-th column in the previous frame of two adjacent frames, Vij_1 represents 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 in the previous frame of the two adjacent frames, Lij_2 represents the luminance of the rectangular backlight partition of the i-th row and j-th column in the latter frame of two adjacent frames, Vij_2 represents 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 in the latter frame of the two adjacent frames.

7. The liquid crystal display device according to claim 3, wherein 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 and luminance of the rectangular backlight partition in the jth column of the i-th row satisfy the following formula 2,

Lij_1*Vij_1+Lij_2*Vij_2=2*Lij*Vij, 

 

[formula 2]

wherein Lij represents the luminance of the rectangular backlight partition of the ith row and the jth column when the liquid crystal display is set to display the picture in only one frame, Vij represents the sum of the pixel voltages of all the liquid crystal pixels in the rectangular panel partition when the liquid crystal display is set to display the picture in only one frame, Lij_1 represents the luminance of the rectangular backlight partition in the i-th row and j-th column in the previous frame of two adjacent frames, Vij_1 represents 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 in the previous frame of the two adjacent frames, Lij_2 represents the luminance of the rectangular backlight partition of the i-th row and j-th column in the latter frame of two adjacent frames, Vij_2 represents 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 in the latter frame of the two adjacent frames.

8. The liquid crystal display device according to claim 4, wherein 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 and luminance of the rectangular backlight partition in the jth column of the i-th row satisfy the following formula 2,

Lij_1*Vij_1+Lij_2*Vij_2=2*Lij*Vij, 

 

[formula 2]

wherein Lij represents the luminance of the rectangular backlight partition of the ith row and the jth column when the liquid crystal display is set to display the picture in only one frame, Vij represents the sum of the pixel voltages of all the liquid crystal pixels in the rectangular panel partition when the liquid crystal display is set to display the picture in only one frame.

9. The liquid crystal display device according to claim 1, wherein a number of lateral transistors in each row on the transistor array substrate is greater than that of vertical transistors in each column, and the source control chip and the gate control chip are located at a lateral side of the display area.

10. The liquid crystal display device according to claim 1, wherein thin film transistors in the transistor array substrate are single gate transistors, the gate control chip and the source control chip are sequentially arranged along a lateral side of the display area.

11. The liquid crystal display device according to claim 1, wherein the source control chip and the gate control chip are both fixed on a flexible circuit board by chip on film package.

12. The liquid crystal display device according to claim 1, wherein the source control chip and the gate control chip are both fixed on a flexible circuit board by tape carrier package.

13. The liquid crystal display device according to claim 1, wherein the liquid crystal panel is a liquid crystal panel with a vertically aligned display mode.

14. The liquid crystal display device according to claim 13, wherein the liquid crystal panel comprises the transistor array substrate, a color filter substrate and negative liquid crystal, the negative liquid crystal is sandwiched between the color filter substrate and the array substrate.

15. The liquid crystal display device according to claim 13, wherein the liquid crystal panel and the backlight module are arranged facing each other, and the liquid crystal panel and the backlight module are combined and fixed by a frame.

16. The liquid crystal display device according to claim 1, wherein the liquid crystal pixel comprises at least one red liquid crystal pixel, at least one green liquid crystal pixel or at least one blue liquid crystal pixel, in the column direction, the liquid crystal pixels are the same color liquid crystal pixels, and in the row direction, the liquid crystal pixels are arranged sequentially with groups of the red liquid crystal pixel, the green liquid crystal pixel and the blue liquid crystal pixel.

17. A liquid crystal display device, comprising:

a liquid crystal panel, comprising a plurality of liquid crystal pixels, wherein the liquid crystal panel is configured to display a same picture in two adjacent frames, the liquid crystal panel further comprises a display area and a non-display area surrounding the display area, the display area is provided with a transistor array substrate, the liquid crystal panel is a liquid crystal panel with a vertically aligned display mode, and the liquid crystal pixel comprises at least one red liquid crystal pixel, at least one green liquid crystal pixel or at least one blue liquid crystal pixel;

a driving module disposed on the non-display area, wherein the driving module is used to respectively provide each liquid crystal pixel with a same polarity pixel voltage of different levels in the two adjacent frames so as to deflect liquid crystal molecules of each liquid crystal pixel, and in each frame of the two adjacent frames, the level of the pixel voltage of each liquid crystal pixel is different from the level of the pixel voltage of the adjacent liquid crystal pixels in front, back, left or right;

wherein the non-display area is provided with a source control chip and a gate control chip, the source control chip is electrically connected to source electrodes of the transistors in the transistor array substrate through data lines, the gate control chip is electrically connected with gate electrodes of the transistors through scan lines, and the source control chip and the gate control chip are located at a same side of the display area.

18. The liquid crystal display device according to claim 17, wherein the pixel voltage of the liquid crystal pixel is proportional to the light transmittance of the liquid crystal pixel, a product of the light transmittance of the liquid crystal pixel and luminance of backlight is display brightness of the liquid crystal pixel.

19. The liquid crystal display device according to claim 17, wherein sum of the brightness of a same picture displayed in two adjacent frames of each rectangular panel partition of the liquid crystal panel is twice the brightness of the picture displayed in one frame of the liquid crystal panel without compensating for low color shift of viewing angle.

20. The liquid crystal display device according to claim 17, wherein the liquid crystal panel comprises the transistor array substrate, a color filter substrate and negative liquid crystal, the negative liquid crystal is sandwiched between the color filter substrate and the array substrate.