Timing controller and display device including the same

Patent metadata

Field	Value
Publication number	US-10078990-B2
Application number	US-201615014862-A
Country	US
Kind code	B2
Filing date	Feb 3, 2016
Priority date	Mar 27, 2015
Publication date	Sep 18, 2018
Grant date	Sep 18, 2018

Abstract

A timing controller includes: a compensator to receive an image signal and to output a compensation image signal; a dimming range adjustor to receive a backlight dimming signal and to output a dimming range signal to adjust an active section of the backlight dimming signal; a smoothing processor to output a smoothing image signal to smooth the compensation image signal in response to the dimming range signal; and a data output part to output an image data signal by adding the smoothing image signal to the image signal.

First claim

What is claimed is:

1. A timing controller comprising:
a compensator configured to receive an image signal and to output a compensation image signal;
a dimming range adjustor configured to receive a backlight dimming signal and to output a dimming range signal to adjust an active section of the backlight dimming signal;
a smoothing processor configured to output a smoothing image signal to smooth the compensation image signal in response to the dimming range signal; and
a data output part configured to output an image data signal by adding the smoothing image signal to the image signal.

2. The timing controller of claim 1 , wherein the compensator comprises a lookup table to store the compensation image signal corresponding to a grayscale value of the image signal.

3. The timing controller of claim 2 , wherein
the image signal corresponds to one of G grayscale values;
the lookup table stores H compensation image signals respectively corresponding to the G grayscale values of the image signal; and
the compensator is configured to interpolate the H compensation image signals to output the compensation image signal corresponding to the image signal (where G and H are positive integers, respectively (G>H)).

4. The timing controller of claim 3 , further comprising a global dimming block configured to output a backlight control signal by delaying the backlight dimming signal by a time.

5. The timing controller of claim 4 , wherein the compensator is configured to output the compensation image signal corresponding to the grayscale value of the image signal by referring to the lookup table, and to compensate the compensation image signal in response to a compensation level signal.

6. The timing controller of claim 5 , wherein the dimming range adjustor is configured to output the dimming range signal by adjusting the active section of the backlight dimming signal in response to a rising delay setting signal and a falling delay setting signal.

7. A display device comprising:
a display panel comprising a plurality of pixels respectively connected to a plurality of gate lines and a plurality of data lines;
a gate driver configured to drive the plurality of gate lines;
a data driver configured to drive the plurality of data lines in response to an image data signal;
a backlight configured to supply light to the display panel in response to a backlight control signal; and
a timing controller configured to receive an image signal, a control signal, and a backlight dimming signal, and to provide the image data signal to the data driver and the backlight control signal to the backlight,
wherein the timing controller is configured to provide the image data signal to the data driver by compensating the image signal received during an active section of the backlight control signal, and
wherein the timing controller comprises:
a compensator configured to receive the image signal and to output a compensation image signal;
a dimming range adjustor configured to receive the backlight dimming signal and to output a dimming range signal to adjust an active section of the backlight dimming signal;
a smoothing processor configured to output a smoothing image signal to smooth the compensation image signal in response to the dimming range signal; and
a data output part configured to output the image data signal by adding the smoothing image signal to the image signal.

8. The display device of claim 7 , wherein the timing controller is configured to provide the image data signal to the data driver by compensating the image signal received during a rising section and a falling section of the backlight control signal.

9. The display device of claim 7 , wherein the compensator comprises a lookup table to store the compensation image signal corresponding to a grayscale value of the image signal.

10. The display device of claim 9 , wherein
the image signal corresponds to one of G grayscale values;
the lookup table stores H compensation image signals respectively corresponding to the G grayscale values of the image signal; and
the compensator is configured to interpolate the H compensation image signals to output the compensation image signal corresponding to the image signal (where G and H are positive integers, respectively (G>H)).

11. The display device of claim 10 , wherein the timing controller comprises a global dimming block configured to output the backlight control signal by delaying the backlight dimming signal by a time.

12. The display device of claim 11 , wherein the compensator is configured to output the compensation image signal corresponding to the grayscale value of the image signal by referring to the lookup table, and to compensate the compensation image signal in response to a compensation level signal.

13. The display device of claim 12 , wherein the dimming range adjustor is configured to output the dimming range signal by adjusting the active section of the backlight dimming signal in response to a rising delay setting signal and a falling delay setting signal.

14. The display device of claim 13 , wherein the smoothing processor is configured to output the smoothing image signal by smoothing the compensation image signal during a rising section and a falling section of the dimming range signal in response to a smoothing section setting signal.

15. The display device of claim 14 , wherein the timing controller further comprises a setting storage part configured to store the compensation level signal, the rising delay setting signal, the falling delay setting signal, and the smoothing section setting signal.

16. The display device of claim 7 , wherein the timing controller further comprises a control signal processor configured to output a first control signal to drive the data driver and a second control signal to drive the gate driver in response to the control signal.

Assignees

• Samsung Display Co Ltd

Inventors

• Jeon Byungkil
• Lee Junpyo
• Lee Hwanwoong
• Sung Yongho
• Jung Woojung
• Moon Seunghwan

Classifications

• G09G2310/08

  Details of timing specific for flat panels, other than clock recovery · CPC title

• G09G3/3648 Primary

  using an active matrix (G09G3/367 - G09G3/3696 take precedence) · CPC title

• G09G2320/0285

  using tables for spatial correction of display data · CPC title

• G09G2320/064

  by time modulation of the brightness of the illumination source · CPC title

• G09G3/3406 Primary

  Control of illumination source (illumination devices structurally associated with liquid crystal cells G02F1/1336) · CPC title