Method and apparatus for compensating for temperature variations of a liquid crystal display panel for a 3-dimensional display

Patent metadata

Field	Value
Publication number	US-9357207-B2
Application number	US-91221510-A
Country	US
Kind code	B2
Filing date	Oct 26, 2010
Priority date	Oct 26, 2009
Publication date	May 31, 2016
Grant date	May 31, 2016

Abstract

Methods and apparatuses are provided for compensating for a temperature of a liquid crystal display (LCD) panel. The method includes selecting a lookup table corresponding to a detected temperature of the LCD panel from among lookup tables for a 3-dimensional (3D) display of the LCD panel; and adjusting luminance to be output to the LCD panel based on the selected lookup table.

First claim

What is claimed is:

1. A method of compensating for a temperature of a liquid crystal display (LCD) panel, the method comprising:
selecting a lookup table corresponding to a directly detected temperature of the LCD panel from among a plurality of lookup tables comprising first lookup tables for a two-dimensional (2D) display and second lookup tables for a 3-dimensional (3D) display of the LCD panel; and
selecting a gamma value according to the detected temperature of the LCD panel; and
adjusting a luminance to be output to the LCD panel based on the selected lookup table and the selected gamma value,
wherein the first lookup tables comprise a temperature compensating lookup table set according to each temperature for the 2D display and the second lookup tables comprises a temperature compensating lookup table set according to each temperature for the 3D display.

2. The method of claim 1 , further comprising directly detecting the temperature of the LCD panel by measuring the temperature of the LCD panel.

3. The method of claim 1 , further comprising applying a voltage to each pixel of the LCD panel based on the adjusted luminance.

4. The method of claim 1 , wherein the temperature compensating lookup table for the 2D display or the 3D display is set according to a temperature section having a predetermined temperature range for the 2D display or the 3D display.

5. The method of claim 4 , wherein the temperature compensating lookup table for the 2D display or the 3D display comprises information about an input luminance, a target luminance, and a virtual luminance, the virtual luminance corresponding to the input luminance and the target luminance, for the 2D display or the 3D display.

6. The method of claim 1 , wherein the second lookup tables for the 3D display comprise information about an input luminance, a target luminance, and a virtual luminance, with the virtual luminance corresponding to the input luminance and the target luminance.

7. The method of claim 6 , wherein, in the adjusting the luminance, when a current frame and a following frame are sequentially displayed on the LCD panel, luminance of the current frame is the input luminance, luminance of the following frame is the target luminance, and the virtual luminance for changing the input luminance to the target luminance is selected as the luminance to be output to the LCD panel based on the selected lookup table.

8. The method of claim 1 , wherein the second lookup tables for the 3D display are set according to the luminance or an applied voltage corresponding to the luminance.

9. The method of claim 1 , wherein the gamma values corresponding to each temperature are set according to a temperature section having a predetermined temperature range.

10. The method of claim 1 , wherein the selecting the gamma value comprises selecting a gamma value for the 2D display or a gamma value for the 3D display according to whether the LCD panel is operated in a 2D or 3D mode.

11. An apparatus for compensating for a temperature of a liquid crystal display (LCD) panel, the apparatus comprising:
a lookup table selector which selects a lookup table corresponding to a directly detected temperature of the LCD panel from among a plurality of lookup tables comprising first lookup tables for a two-dimensional (2D) display and second lookup tables for a 3-dimensional (3D) display of the LCD panel; and
a gamma value selector configured to select a gamma value according to the detected temperature of the LCD panel; and
a temperature compensator configured to adjust a luminance to be output to the LCD panel based on the lookup table selected by the lookup table selector and the selected gamma value,
wherein the first lookup tables comprise a temperature compensating lookup table set according to each temperature for the 2D display and the second lookup tables comprises a temperature compensating lookup table set according to each temperature for the 3D display.

12. The apparatus of claim 11 , further comprising an LCD panel temperature detector which directly detects the temperature of the LCD panel by measuring the temperature of the LCD panel.

13. The apparatus of claim 11 , further comprising an LCD driving voltage applier applying a voltage to each pixel of the LCD panel, where the applied voltage corresponds to the luminance adjusted by the temperature compensator.

14. The apparatus of claim 11 , wherein the temperature compensating lookup table for the 2D display or the 3D display is set according to a temperature section having a predetermined temperature range for the 2D display or the 3D display.

15. The apparatus of claim 14 , wherein the temperature compensating lookup table for the 2D display or the 3D display comprises information about an input luminance, a target luminance, and a virtual luminance, the virtual luminance corresponding to the input luminance and the target luminance, for the 2D display or the 3D display.

16. The apparatus of claim 11 , wherein the second lookup tables for the 3D display comprise information about an input luminance, a target luminance, and a virtual luminance, the virtual luminance corresponding to the input luminance and the target luminance.

17. The apparatus of claim 16 , wherein, in the temperature compensator, when a current frame and a following frame are sequentially displayed on the LCD panel, luminance of the current frame is the input luminance, luminance of the following frame is the target luminance, and the virtual luminance for changing the input luminance to the target luminance is selected as the luminance to be output to the LCD panel based on the selected lookup table.

18. The apparatus of claim 11 , wherein the second lookup tables for the 3D display are set according to the luminance or an applied voltage corresponding to the luminance.

19. The apparatus of claim 11 , wherein the gamma values corresponding to each temperature are set according to a temperature section having a predetermined temperature range.

20. A computer program product for compensating for a temperature of a liquid crystal display (LCD) panel, the computer program product embodied on a non-transitory computer readable medium and when executed by a computer, performs the method comprising:
selecting a lookup table corresponding to a directly detected temperature of the LCD panel from among a plurality of lookup tables comprising first lookup tables for a two-dimensional (2D) display and second lookup tables for a 3-dimensional (3D) display of the LCD panel; and
a gamma value selector configured to select a gamma value according to the detected temperature of the LCD panel; and
adjusting a luminance to be output to the LCD panel based on the selected lookup table and the selected gamma value,
wherein the first lookup tables comprise a temperature compensating lookup table set according to each temperature for the 2D display and the second lookup tables comprises a temperature compensating lookup table set according to each temperature for the 3D display.

Assignees

• Park Sang-Moo
• Lee Ho-Seop
• Jung Jong-Hoon
• Kim Dae-Sik
• Samsung Electronics Co Ltd

Inventors

• Park Sang-Moo
• Lee Ho-Seop
• Jung Jong-Hoon
• Kim Dae-Sik

Classifications

• H04N13/0452 Primary

  Electricity · mapped topic

• G09G3/36

  using liquid crystals · CPC title

• G09G2320/0626

  for control of overall brightness · CPC title

• G09G2320/041

  Temperature compensation · CPC title

• H04N13/0497

  Electricity · mapped topic