Liquid crystal display device

• US 10,643,550 B2
• Filed: 12/16/2017
• Issued: 05/05/2020
• 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): Sharifi-Tafreshi, Koosha
• Application Number:
  US16/087,141
• Publication Number:
  US 20190114975A1
• Time in Patent Office: 871 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 1/133601 for spatial active dimming
• CPC Class Codes: G02F 1/133602 Direct backlight
• CPC Class Codes: G02F 1/133611 including means for improving the brightness uniformity
• CPC Class Codes: G02F 1/133621 providing coloured light G02F1/133617, G02F1/133533 take precedence
• CPC Class Codes: G02F 1/13452 Conductors connecting driver circuitry and terminals of panels
• CPC Class Codes: G02F 1/13454 Drivers integrated on the active matrix substrate G02F1/136277 takes precedence
• CPC Class Codes: G02F 1/1368 in which the switching element is a three-electrode device G02F1/136277 takes precedence
• CPC Class Codes: G09G 2300/0426 Layout of electrodes and connections
• CPC Class Codes: G09G 2300/0452 Details of colour pixel setup, e.g. pixel composed of a red, a blue and two green components
• CPC Class Codes: G09G 2310/08 Details of timing specific for flat panels, other than clock recovery
• CPC Class Codes: G09G 2320/0233 Improving the luminance or brightness uniformity across the screen
• CPC Class Codes: G09G 2320/0247 Flicker reduction other than flicker reduction circuits used for single beam cathode-ray tubes
• CPC Class Codes: G09G 2320/028 by changing the viewing angle properties, e.g. widening the viewing angle, adapting the viewing angle to the view direction
• CPC Class Codes: G09G 2320/0285 using tables for spatial correction of display data
• 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 2320/066 for control of contrast
• CPC Class Codes: G09G 2360/16 Calculation or use of calculated indices related to luminance levels in display data
• CPC Class Codes: G09G 3/2003 Display of colours specific for liquid crystal displays G09G3/3607
• CPC Class Codes: G09G 3/3413 : Details of control of colour illumination sources
• 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 3/3648 : using an active matrix G09G3/367 - G09G3/3696 take precedence
• CPC Class Codes: G09G 3/3666 : with the matrix divided into sections

Abstract

The disclosure relates to a liquid crystal display device, including a display panel having a display component and a backlight module having a backlight component divided into a plurality of backlight sub-areas, wherein the liquid crystal display device further includes a drive component, connected to the display component and configured to display each picture with two frame images in sequence; the two frame images include a first frame image and a second frame image; drive voltages of adjacent two sub-pixels on each frame image include a high drive voltage and a low drive voltage, and the drive voltages of each sub-pixel in the first frame image and in the second frame image include a high drive voltage and a low drive voltage; a backlight control component, connected to the drive component; and a backlight adjusting component, connected to the backlight control component and the backlight component respectively.

Claims

1. A liquid crystal display device, comprising a display panel having a display component and a backlight module having a backlight component divided into a plurality of backlight sub-areas, wherein the liquid crystal display device further comprises a memory storing a computer executable instruction, and a driving device, wherein the driving device executes the computer executable instruction that performs a method comprising:

displaying each picture with two frame images in sequence;

the two frame images comprise a first frame image and a second frame image;

drive voltages of adjacent two sub-pixels on each frame image comprise a high drive voltage and a low drive voltage, and the drive voltages of each sub-pixel in the first frame image and in the second frame image comprise a high drive voltage and a low drive voltage;

acquiring position information of a current sub-pixel and drive data for driving the current sub-pixel;

looking up a judging parameter corresponding to the position information in a first parameter lookup table according to the position information;

directly outputting the drive data if the judging parameter is a first parameter; and

looking up and outputting compensation drive data in a second parameter lookup table according to the position information and the drive data if the judging parameter is a second parameter, wherein the second parameter lookup table corresponds to the position information, and the compensation drive data corresponds to the drive data;

wherein the backlight module further comprises;

a first backlight controller connected to the driving device and configured for determining backlight brightness adjusting signals of each backlight sub-area according to the drive voltages of a first frame image area and a second frame image area corresponding to each backlight sub-area, wherein the backlight brightness adjusting signals are in groups and a group number is same as a variety number of color sub-pixels; and

a second backlight controller connected to the first backlight controller and the backlight component respectively, and configured for performing independent brightness adjustment on a backlight source of the sub-pixels of various colors in corresponding backlight sub-areas in respective frame images of a next picture.

2. The liquid crystal display device according to claim 1, further comprising a storage memory, wherein the storage memory is electrically connected to the display panel and the backlight module and is configured for storing a lookup table;

the lookup table is a corresponding relation table of the drive voltage of each sub-pixel in the first frame image and the second frame image corresponding to an input signal and the input signal; and

the driving device acquires the drive voltage of each sub-pixel on the first frame image and the second frame image by the lookup table.

3. The liquid crystal display device according to claim 1, wherein the first backlight controller component comprises

a counter, configured for counting average drive voltages of the sub-pixels of various colors in the first frame image area and the second frame image area corresponding to each backlight sub-area;

and

a calculator, configured for solving the backlight brightness adjustment signals according to the average drive voltages, reference backlight brightness signals and reference drive voltages of respective backlight sub-areas.

4. The liquid crystal display device according to claim 3, wherein a calculating formula for the calculator to solve the backlight brightness adjustment signal of the sub-pixels of each color in each backlight sub-area is as follows:

A_{M_P1}*P_{M_ave1}′

A_{M_P2}*P_{M_ave2};

2*A_{M_P}*P_{M_ave}=A_{M_P1}*P_{M_ave1}+A_{M_P2}*P_{M_ave2};

wherein P represents a target color sub-pixel;

M represents a serial number of the backlight sub-area;

A_{M_P1} represents the backlight brightness adjustment signal for performing backlight brightness adjustment on a backlight source of P sub-pixels in the backlight sub-area M corresponding to the first frame image of the next picture;

A_{M_P2} represents the backlight brightness adjustment signal for performing backlight brightness adjustment on a backlight source of the P sub-pixels in the backlight sub-area M corresponding to the second frame image of the next picture;

P_{M_ave1} represents an average value of the drive voltages of the P sub-pixels in the backlight sub-area M corresponding to the first frame image of the current picture;

P_{M_ave2} represents an average value of the drive voltages of the P sub-pixels in the backlight sub-area M corresponding to the second frame image of the current picture;

A_{M_P} represents the reference backlight brightness signal of the P sub-pixels in the backlight sub-area M corresponding to the image of the current picture; and

P_{M_ave} represents the average value of reference drive voltages of the P sub-pixels in the frame image area corresponding to the backlight sub-area M on the image of the current picture.

5. The liquid crystal display device according to claim 1, wherein the backlight source is a white light backlight source, an RGB backlight source, an RGBW backlight source or RGBY backlight source.

6. The liquid crystal display device according to claim 1, further comprising a display panel, wherein the display component and the driving device are integrated on the display panel.

7. The liquid crystal display device according to claim 1, further comprising a backlight module, wherein the backlight component, the first backlight controller and the second backlight controller are integrated on the backlight module.

8. The liquid crystal display device according to claim 1, wherein the driving device further comprises a timing controller.

9. The liquid crystal display device according to claim 1, further comprising a backlight module, wherein the backlight component, the first backlight controller and the second backlight controller are integrated on the backlight module;

the first backlight controller comprises

a counter, configured for counting average drive voltages of the sub-pixels of various colors in the first frame image area and the second frame image area corresponding to each backlight sub-area; and

a calculator, configured solving sore the backlight brightness adjustment signals according to the average drive voltages, reference backlight brightness signals and reference drive voltages of respective backlight sub-areas.

10. The liquid crystal display device according to claim 1, wherein the second parameter lookup table of the driving device comprises a first compensation parameter lookup table, a second compensation parameter lookup table and a third compensation parameter lookup table;

the step of looking up and outputting compensation drive data in a second parameter lookup table according to the position information and the drive data if the judging parameter is a second parameter comprises;

looking up and outputting the compensation drive data in the first compensation parameter lookup table if the sub-pixels corresponding to the position information are first color sub-pixels;

looking up and outputting the compensation drive data in the second compensation parameter lookup table if the sub-pixels corresponding to the position information are second color sub-pixels; and

looking up and outputting the compensation drive data in the third compensation parameter lookup table if the sub-pixels corresponding to the position information are third color sub-pixels.

11. The liquid crystal display device according to claim 6, wherein the display panel comprises at least one sub-pixel unit, the sub-pixel unit comprises m column×

n row sub-pixels, the at least one sub-pixel unit is regularly arranged to form a pixel array comprising m column×

n row sub-pixels, the first parameter lookup table is formed by m column×

n row judging parameters, and the sub-pixels in the sub-pixel unit correspond to the judging parameters in the first parameter lookup table one to one according to an arrangement position;

wherein M≥

m≥

1, N≥

n≥

1, and M, N, m and n are positive integers.

12. The liquid crystal display device according to claim 11, wherein each column of sub-pixels in the pixel array comprises multiple groups of sub-pixels, each group of sub-pixels comprises a first color sub-pixel, a second color sub-pixel and a third color sub-pixels which are arranged in sequence, the sub-pixels in a same row are same in color, and the first color sub-pixel, the second color sub-pixel and the third color sub-pixel have at least one red sub-pixel, at least one green sub-pixel and at least one blue sub-pixel.

13. A liquid crystal display device, a comprising a display panel having a display component and a backlight module having a backlight component divided into a plurality of backlight sub-areas, wherein the liquid crystal display device further comprises a memory storing a computer executable instruction, and a driving device, wherein the driving device executes the computer executable instruction that performs a method comprising:

displaying each picture with two frame images in sequence;

the display component and the drive component are integrated on the display panel;

the two frame images comprise a first frame image and a second frame image;

drive voltages of adjacent two sub-pixels on each frame image comprise a high drive voltage and a low drive voltage, and the drive voltages of each sub-pixel in the first frame image and in the second frame image comprise a high drive voltage and a low drive voltage;

acquiring position information of a current sub-pixel and drive data for driving the current sub-pixel;

looking up a judging parameter corresponding to the position information in a first parameter lookup table according to the position information;

directly outputting the drive data if the judging parameter is a first parameter; and

looking up and outputting compensation drive data in a second parameter lookup table according to the position information and the drive data if the judging parameter is a second parameter, wherein the second parameter lookup table corresponds to the position information, and the compensation drive data corresponds to the drive data;

wherein the backlight module further comprises;

a first backlight controller, connected to the driving device and configured for determining backlight brightness adjusting signals of each backlight sub-area according to the drive voltages of a first frame image area and a second frame image area corresponding to each backlight sub-area, wherein the backlight brightness adjusting signals are in groups and a group number is same as a variety number of color sub-pixels;

a second backlight controller, connected to the first backlight controller and the backlight component respectively, and configured for performing independent brightness adjustment on a backlight source of the sub-pixels of various colors in corresponding backlight sub-areas in respective frame images of a next picture;

wherein the backlight component, the first backlight controller and the second backlight controller are integrated on the backlight module.

14. The liquid crystal display device according to claim 13, further comprising a storage memory, wherein the storage memory is electrically connected to the display panel and the backlight module and is configured to for storing a lookup table;

the lookup table is a corresponding relation table of the drive voltage of each sub-pixel in the first frame image and the second frame image corresponding to an input signal and the input signal; and

the acquires the drive voltage of each sub-pixel on the first frame image and the second frame image by the lookup table.

15. The liquid crystal display device according to claim 14, wherein the first backlight controller comprises:

a counter configured for counting average drive voltages of the sub-pixels of various colors in the first frame image area and the second frame image area corresponding to each backlight sub-area; and

a calculator configured for solving the backlight brightness adjustment signals according to the average drive voltages, reference backlight brightness signals and reference drive voltages of respective backlight sub-areas;

wherein a calculating formula for the calculator to solve the backlight brightness adjustment signal of the sub-pixels of each color in each backlight sub-area is as follows;

A_{M_P1}*P_{M_ave1}=A_{M_P2}*P_{M_ave2};

2*A_{M_P}*P_{M_ave}=A_{M_P1}*P_{M_ave1}+A_{M_P2}*P_{M_ave2};

wherein P represents a target color sub-pixel;

M represents a serial number of the backlight sub-area;

A_{M_P1} represents the backlight brightness adjustment signal for performing backlight brightness adjustment on a backlight source of P sub-pixels in the backlight sub-area M corresponding to the first frame image of the next picture;

A_{M_P2} represents the backlight brightness adjustment signal for performing backlight brightness adjustment on a backlight source of the P sub-pixels in the backlight sub-area M corresponding to the second frame image of the next picture;

P_{M_ave1} represents an average value of the drive voltages of the P sub-pixels in the backlight sub-area M corresponding to the first frame image of the current picture;

P_{M_ave2} represents an average value of the drive voltages of the P sub-pixels in the backlight sub-area M corresponding to the second frame image of the current picture;

A_{M_P} represents the reference backlight brightness signal of the P sub-pixels in the backlight sub-area M corresponding to the image of the current picture; and

P_{M_ave} represents the average value of reference drive voltages of the P sub-pixels in the frame image area corresponding to the backlight sub-area M on the image of the current picture.

16. The liquid crystal display device according to claim 13, wherein the backlight source is a white light backlight source, an RGB backlight source, an RGBW backlight source or RGBY backlight source.

17. The liquid crystal display device according to claim 13, wherein the driving device further comprises a timing controller.

18. The liquid crystal display device according to claim 13, wherein the second parameter lookup table of the driving device comprises a first compensation parameter lookup table, a second compensation parameter lookup table and a third compensation parameter lookup table;

the step of looking up and outputting compensation drive data in a second parameter lookup table according to the position information and the drive data if the judging parameter is a second parameter comprises;

looking up and outputting the compensation drive data in the first compensation parameter lookup table if the sub-pixels corresponding to the position information are first color sub-pixels;

looking up and outputting the compensation drive data in the second compensation parameter lookup table if the sub-pixels corresponding to the position information are second color sub-pixels; and

looking up and outputting the compensation drive data in the third compensation parameter lookup table if the sub-pixels corresponding to the position information are third color sub-pixels.

19. The liquid crystal display device according to claim 13, wherein the display panel comprises at least one sub-pixel unit, the sub-pixel unit comprises m column×

n row sub-pixels, the at least one sub-pixel unit is regularly arranged to form a pixel array comprising m column×

n row sub-pixels, the first parameter lookup table is formed by m column×

n row judging parameters, and the sub-pixels in the sub-pixel unit correspond to the judging parameters in the first parameter lookup table one to one according to an arrangement position;

wherein M≥

m≥

1, N≥

n≥

1, and M, N, m and n are positive integers.

20. The liquid crystal display device according to claim 19, wherein the each column of sub-pixels in the pixel array comprises multiple groups of sub-pixels, each group of sub-pixels comprises a first color sub-pixel, a second color sub-pixel and a third color sub-pixels which are arranged in sequence, the sub-pixels in a same row are same in color, and the first color sub-pixel, the second color sub-pixel and the third color sub-pixel have at least one red sub-pixel, at least one green sub-pixel and at least one blue sub-pixel.