Timing controller of operating selective sensing and organic light emitting display device comprising the same

Patent metadata

Field	Value
Publication number	US-9886908-B2
Application number	US-201615195402-A
Country	US
Kind code	B2
Filing date	Jun 28, 2016
Priority date	Jun 30, 2015
Publication date	Feb 6, 2018
Grant date	Feb 6, 2018

Abstract

There are provided a timing controller of operating selective sensing and an organic light emitting display device comprising the same, the timing controller being configured to selectively perform a sensing when a display panel operates in an ON state. The timing controller performs a sensing to the display panel on the basis of a temperature of the display panel, a time difference in operation of the display panel, and a degree of need for sensing of representative sub-pixels.

First claim

What is claimed is:

1. An organic light emitting display device comprising:
a display panel in which a plurality of sub-pixels is disposed;
a gate driver configured to apply a signal to a gate line in the display panel;
a data driver configured to apply a signal to a data line in the display panel; and
a timing controller configured to control the gate driver and the data driver by calculating any one or more of a temperature of the display panel, an OFF-ON time difference of the display panel, and a degree of need for sensing of the sub-pixels and determining whether or not to perform a sensing to the display panel when the display panel is changed from an OFF state to an ON state,
wherein each of the sub-pixels includes an organic light emitting diode and a driving transistor configured to drive the organic light emitting diode, and
the timing controller controls the gate driver and the data driver in order to control a selective sensing to driving transistors of the sub-pixels when the display panel is changed from the OFF state to the ON state.

2. The organic light emitting display device according to claim 1 , wherein the timing controller controls the gate driver and the data driver to output an image on the display panel without a sensing to the sub-pixels if a difference between a time for completing a sensing to the display panel and a time for changing the display panel to the ON state is higher than a preset reference.

3. The organic light emitting display device according to claim 1 , further comprising: a temperature sensor configured to check a temperature, wherein the timing controller controls a selective sensing to the sub-pixels depending on the temperature sensed by the temperature sensor.

4. The organic light emitting display device according to claim 1 ,
wherein the timing controller performs a preceding sensing to some sub-pixels in the display panel to control a sensing to the plurality of sub-pixels represented by the some sub-pixels.

5. The organic light emitting display device according to claim 4 ,
wherein the preceding sensing is performed to sub-pixels selected by color from the sub-pixels constituting the display panel, and
the timing controller controls a sensing to all sub-pixels of a color represented by the sub-pixels according to a result of the preceding sensing.

6. The organic light emitting display device according to claim 4 ,
wherein the preceding sensing is performed to sub-pixels selected from sub-pixels constituting divided areas in the display panel, and
the timing controller controls a sensing to all sub-pixels in an area represented by the sub-pixels according to a result of the preceding sensing.

7. A timing controller that controls a gate driver configured to apply a signal to a gate line in a display panel in which a plurality of sub-pixels is disposed and a data driver configured to apply a signal to a data line in the display panel, and
controls the gate driver and the data driver by calculating any one or more of a temperature of the display panel, an OFF-ON time difference of the display panel, and a degree of need for sensing of the sub-pixels and determining whether or not to perform a sensing to the display panel when the display panel is changed from an OFF state to an ON state,
wherein each of the sub-pixels includes an organic light emitting diode and a driving transistor configured to drive the organic light emitting diode, and
the timing controller controls the gate driver and the data driver in order to control a selective sensing to driving transistors of the sub-pixels when the display panel is changed from the OFF state to the ON state.

8. The timing controller according to claim 7 , wherein the timing controller controls the gate driver and the data driver to output an image on the display panel without a sensing to the sub-pixels if a difference between a time for completing a sensing to the display panel and a time for changing the display panel to the ON state is higher than a preset reference.

9. The timing controller according to claim 7 ,
wherein the timing controller controls a selective sensing to the sub-pixels depending on a temperature sensed by a temperature sensor included in any one of the display panel, the gate driver, or the data driver.

10. The timing controller according to claim 7 ,
wherein the timing controller performs a preceding sensing to some sub-pixels in the display panel to control a sensing to the plurality of sub-pixels represented by the some sub-pixels.

11. The timing controller according to claim 10 ,
wherein the preceding sensing is performed to sub-pixels selected by color from the sub-pixels constituting the display panel, and
the timing controller controls a sensing to all sub-pixels of a color represented by the sub-pixels according to a result of the preceding sensing.

12. The timing controller according to claim 10 ,
wherein the preceding sensing is performed to sub-pixels selected from sub-pixels constituting divided areas in the display panel, and
the timing controller controls a sensing to all sub-pixels in an area represented by the sub-pixels according to a result of the preceding sensing.

Assignees

• Lg Display Co Ltd

Inventors

• Tani Ryosuke
• Bae Sungjoon
• Bae Nayoung

Classifications

• G09G2320/029

  by monitoring one or more pixels in the display panel, e.g. by monitoring a fixed reference pixel · CPC title

• G09G3/3233

  with pixel circuitry controlling the current through the light-emitting element · CPC title

• G09G2320/041

  Temperature compensation · CPC title

• G09G2320/048

  using evaluation of the usage time · CPC title

• G09G2320/045

  Compensation of drifts in the characteristics of light emitting or modulating elements · CPC title