Method and apparatus for compensating view chromatic aberration of display device and display device

Patent metadata

Field	Value
Publication number	US-11295679-B2
Application number	US-201716466503-A
Country	US
Kind code	B2
Filing date	Sep 1, 2017
Priority date	Nov 17, 2016
Publication date	Apr 5, 2022
Grant date	Apr 5, 2022

Abstract

A method and apparatus for compensating view chromatic aberration of a display device, and a display device are provided, which includes: receiving an inputted image, obtaining a first pixel voltage and a second pixel voltage of each of pixels in two adjacent frames of the image, looking-up the first pixel voltage and the second pixel voltage and obtaining a corresponded first driving signal and a corresponded second driving signal, individually, computing a brightness compensation signal required in a backlight module of a backlight region based on the first driving signal, the second driving signal and a predetermined standard brightness signal, and compensating view chromatic aberration of a post frame of the image based on the brightness compensation signal.

First claim

What is claimed is:

1. A method of compensating view chromatic aberration of a display device, comprising steps as follows:
controlling the display device to receive an inputted image; obtaining a first pixel voltage and a second pixel voltage of each of pixels in two adjacent frames of the image; looking-up the first pixel voltage and the second pixel voltage and obtaining a corresponded first driving signal and a corresponded second driving signal, individually;
computing a brightness compensation signal required in a backlight module of a backlight region based on the first driving signal, the second driving signal and a predetermined standard brightness signal; and
compensating the backlight module of the backlight region for a post frame of the image based on the brightness compensation signal thereby achieving view chromatic aberration compensation of the post frame of the image,
wherein the step of computing the brightness compensation signal comprises:
substituting related parameters into following formulas and computing the required brightness compensation signals:
An _ L×G TH +An _ L×G TL =An _ L L ×G TH +An _ L H ×G TL ;
An _ L×G′ TH +An _ L×G′ TL =An _ L L ×G′ TH +An _ L H ×G′ TL ;

wherein An_L is the standard brightness G TH , G TL are the first driving signal and the second driving signal corresponded to the first pixel voltage; G′ TH , G′ TL are the first driving signal and the second driving signal corresponded to the second pixel voltage; and An_L L and An_L H are the brightness compensation signals required for computation.

2. The method of compensating view chromatic aberration of the display device as claimed in claim 1 , wherein after the step of “to receive an inputted image; to obtain a first pixel voltage and a second pixel voltage of each of pixels in two adjacent frames of the image; to look-up the first pixel voltage and the second pixel voltage and to obtain a corresponded first driving signal and a corresponded second driving signal, individually”, the method further comprises a step of:
determining if the backlight brightness needs to be compensated or not based on the first driving signal and the second driving signal.

3. The method of compensating view chromatic aberration of the display device as claimed in claim 2 , wherein
when a backlight source of white color is configured in the backlight module, the step of “to receive an inputted image; to obtain a first pixel voltage and a second pixel voltage of each of pixels in two adjacent frames of the image; to look-up the first pixel voltage and the second pixel voltage and to obtain a corresponded first driving signal and a corresponded second driving signal, individually” comprises:
receiving the two adjacent frames of the image; obtaining the first pixel voltage and the second pixel voltage of a first primary color of each of the pixels; and
looking-up the first pixel voltage and the second pixel voltage; obtaining the first driving signal and the second driving signal corresponded to the first pixel voltage; and obtaining the first driving signal and the second driving signal corresponded to the second pixel voltage.

4. The method of compensating view chromatic aberration of the display device as claimed in claim 3 , wherein the first primary color is green primary color.

5. The method of compensating view chromatic aberration of the display device as claimed in claim 3 , wherein the step of “determining if the backlight brightness needs to be compensated or not based on the first driving signal and the second driving signal” comprises:
obtaining a difference between the first driving signal and the second driving signal corresponded to the first pixel voltage; wherein if the value of the difference is in a predetermined range, the backlight brightness will not be compensated; wherein if the value of the difference is beyond the predetermined range, the backlight brightness will be compensated.

6. The method of compensating view chromatic aberration of the display device as claimed in claim 2 , wherein
when a backlight source of three primary colors is configured in the backlight module, the step of “to receive an inputted image; to obtain a first pixel voltage and a second pixel voltage of each of pixels in two adjacent frames of the image; to look-up the first pixel voltage and the second pixel voltage and to obtain a corresponded first driving signal and a corresponded second driving signal, individually” comprises:
receiving the two adjacent frames of the image; obtaining the first pixel voltage and the second pixel voltage of a first primary color, a second primary color and a third primary color of each of the pixels; and
looking-up the first pixel voltage and the second pixel voltage; obtaining the first driving signal and the second driving signal corresponded to the first pixel voltage of the first primary color, the second primary color and the third primary color, individually; and obtaining the first driving signal and the second driving signal corresponded to the second pixel voltage of the first primary color, the second primary color and the third primary color, individually.

7. The method of compensating view chromatic aberration of the display device as claimed in claim 6 , wherein the step of “computing a brightness compensation signal required in a backlight module of a backlight region based on the first driving signal, the second driving signal and a predetermined standard brightness signal” comprises:
substituting related parameters into following formulas and computing the required brightness compensation signals:
An _ L R ×R TH +An _ L R ×R TL =An _ L RL ×R TH +An _ L RH ×R TL ;
An _ L G ×G TH +An _ L G ×G TL =An _ L GL ×G TH +An _ L GH ×G TL ;
An _ L B ×B TH +An _ L B ×B TL =An _ L BL ×B TH +An _ L BH ×B TL ;
An _ L R ×R′ TH +An _ L R ×R′ TL =An _ L RL ×R′ TH +An _ L RH ×R′ TL ;
An _ L G ×G′ TH +An _ L G ×G′ TL =An _ L GL ×G′ TH +An _ L GH ×G′ TL ;
An _ L B ×B′ TH +An _ L B ×B′ TL =An _ L BL ×B′ TH +An _ L BH ×B′ TL ;

wherein An_L R , An_L G , An_L B are a first standard brightness signal, a second standard brightness signal and a third standard brightness signal, respectively;
R TH , R TL are the first driving signal and the second driving signal corresponded to the first pixel voltage of the first primary color; R′ TH , R′ TL are the first driving signal and the second driving signal corresponded to the second pixel voltage of the first primary color;
G TH , G TL are the first driving signal and the second driving signal corresponded to the first pixel voltage of the second primary color; G′ TH , G′ TL are the first driving signal and the second driving signal corresponded to the second pixel voltage of the second primary color;
B TH , B TL are the first driving signal and the second driving signal corresponded to the first pixel voltage of the third primary color; B′ TH , B′ TL are the first driving signal and the second driving signal corresponded to the second pixel voltage of the third primary color; and
An_L RL , An_L RH , An_L GL , An_L GH , An_L BL and An_L BH are the brightness compensation signals required for computation.

8. A view chromatic aberration compensation apparatus of a display device, comprising:
a signal obtaining module for receiving an inputted image; obtaining a first pixel voltage and a second pixel voltage of each of pixels in two adjacent frames of the image; and looking-up the first pixel voltage and the second pixel voltage

Assignees

• Hkc Corp Ltd
• Chongqing Hkc Optoelectronics Tech Co Ltd

Inventors

• Lee Chia-Hang

Classifications

• G09G2320/0646

  Modulation of illumination source brightness and image signal correlated to each other · CPC title

• G09G2320/0242

  Compensation of deficiencies in the appearance of colours · CPC title

• G09G2360/16

  Calculation or use of calculated indices related to luminance levels in display data · CPC title

• G09G3/3426

  the different display panel areas being distributed in two dimensions, e.g. matrix · CPC title

• G09G2300/0452

  Details of colour pixel setup, e.g. pixel composed of a red, a blue and two green components · CPC title