Organic Light-Emitting Display Device and Driving Method Thereof

• US 20080198105A1
• Filed: 06/19/2006
• Published: 08/21/2008
• Est. Priority Date: 06/17/2005
• Status: Active Grant

• Current Assignee: LG Display Co., Ltd.
• Original Assignee: LG Display Co., Ltd.
• Inventors: Hwang, Hyun Ha, Shin, Seung Rok
• Granted Patent: US 8,299,985 B2
• Time in Patent Office: Days
• US Class Current: 345/82
• CPC Class Codes: G09G 2320/0285 using tables for spatial correction of display data
• CPC Class Codes: G09G 2330/021 Power management, e.g. power saving
• CPC Class Codes: G09G 2360/16 Calculation or use of calculated indices related to luminance levels in display data
• CPC Class Codes: G09G 3/3208 organic, e.g. using organic light-emitting diodes [OLED]

Abstract

Provided is an organic light-emitting display device. The organic light-emitting display device includes a light-emitting unit having a plurality of OLEDs to emit light, a light-emitting level setting unit setting a light-emitting level depending on a light-emitting area and/or change in a light-emitting degree of the light-emitting unit, a look-up table in which data for the light-emitting degree of the light-emitting unit that corresponds to each light-emitting area for each light-emitting level is set and stored, a light-emitting control unit controlling the light-emitting area of the light-emitting unit and/or the light-emitting degree depending on a light-emitting level with reference to the data set on the look-up table.

Claims

1. An organic light-emitting display device comprising:

a light-emitting unit having a plurality of OLEDs (organic light-emitting diodes) to emit light;

a light-emitting level setting unit, wherein the light-emitting level setting unit sets a light-emitting level depending on a light-emitting area and/or a change in a light-emitting degree of the light-emitting unit;

a look-up table in which data for the light-emitting degree of the light-emitting unit that corresponds to each light-emitting area for each light-emitting level is set and stored; and

a light-emitting control unit capable of controlling the light-emitting area and the light-emitting degree of the light-emitting unit depending on a light-emitting level with reference to the data set on the look-up table.

2. The organic light-emitting display device according to claim 1, wherein the light-emitting control unit drives the OLEDs of the light-emitting unit using a emitting degree value less than the light-emitting degree value stored in the look-up table for a selected light-emitting level.

3. The organic light-emitting display device according to claim 1, wherein the light-emitting level setting unit extracts data from an entire image display region of an input frame to set the light-emitting level.

4. The organic light-emitting display device according to claim 1, wherein the light-emitting level setting unit extracts data from a partial image display region of an input frame to set the light-emitting level.

5. The organic light-emitting display device according to claim 1, wherein the light-emitting level setting unit classifies and sets light-emitting levels according to power consumption of the light-emitting unit when setting the light-emitting levels.

6. The organic light-emitting display device according to claim 1, wherein the data for the light-emitting degree stored in the look-up table contains a maximum light-emitting time and/or maximum number of light-emitting according to the light-emitting area of the light-emitting unit.

7. The organic light-emitting display device according to claim 6, wherein the data for the light-emitting degree stored in the look-up table is set such that a maximum light-emitting time and/or maximum number of light-emitting of the light-emitting unit decreases as the light-emitting area of the light-emitting unit increases for the same light-emitting level.

8. The organic light-emitting display device according to claim 1, wherein the light-emitting control unit controls an input current value to the light-emitting unit together with the light-emitting area and/or light-emitting degree of the light-emitting unit according to the light-emitting level when controlling the light-emitting unit.

9. A method of driving an organic light-emitting display device, wherein the method comprises:

extracting data from an input frame and setting a light-emitting level according to a light-emitting area and a change in a light-emitting degree of a light-emitting unit having a plurality of OLEDs; and

controlling the light-emitting area and/or light-emitting degree of the light-emitting unit according to the set light-emitting level and displaying an image.

10. The method according to claim 9, wherein the setting of the light-emitting level comprises extracting data from an entire image display region of an input frame to set the light-emitting level.

11. The method according to claim 9, wherein the setting of the light-emitting level comprises extracting data from a partial image display region of an input frame to set the light-emitting level.

12. The method according to claim 9, wherein the controlling of the light-emitting area and/or light-emitting degree of the light-emitting unit according to the set light-emitting level to display the image comprises driving the OLEDs of the light-emitting unit with reference to a look-up table in which data for the light-emitting degree of the light-emitting unit that corresponds to each light-emitting area for each light-emitting level is set and stored.

13. The method according to claim 12, wherein the data for the light-emitting degree stored in the look-up table contains a maximum light-emitting time and/or maximum number of light-emitting depending on the light-emitting area of the light-emitting unit.

14. The method according to claim 13, wherein the data for the light-emitting degree stored in the look-up table is set such that a maximum light-emitting time and/or maximum number of light-emitting of the light-emitting unit decreases as the light-emitting area of the light-emitting unit increases for the same light-emitting level.

15. The method according to claim 12, wherein the controlling of the light-emitting area and/or light-emitting degree of the light-emitting unit according to the set light-emitting level to display the image comprises driving the OLEDs of the light-emitting unit using a light-emitting degree value less than the light-emitting degree value stored in the look-up table for a selected light-emitting level.

16. The method according to claim 9, wherein the setting of the light-emitting level comprises classifying and setting light-emitting levels according to power consumption of the light-emitting unit.

17. A method of driving an organic light-emitting display device, wherein the method comprises:

extracting data from an input frame and setting a light-emitting level according to a light-emitting area and a change in a light-emitting degree of a light-emitting unit having a plurality of OLEDs; and

controlling the light-emitting area and/or light-emitting degree of the light-emitting unit according to the set light-emitting level, and controlling an input current value to the light-emitting unit to display an image.

18. The method according to claim 17, wherein the setting of the light-emitting level comprises extracting data from an entire image display region of an input frame to set the light-emitting level.

19. The method according to claim 17, wherein the setting of the light-emitting level comprises extracting data from a partial image display region of an input frame to set the light-emitting level.

20. The method according to claim 17, wherein the controlling of the light-emitting area and/or light-emitting degree of the light-emitting unit according to the set light-emitting level to display the image comprises driving the OLEDs of the light-emitting unit with reference to a look-up table in which data for the light-emitting degree and an input current of the light-emitting unit that corresponds to each light-emitting area for each light-emitting level is set and stored.

21. The method according to claim 20, wherein the data for the light-emitting degree stored in the look-up table contains a maximum light-emitting time and/or maximum number of light-emitting according to the light-emitting area of the light-emitting unit.

22. The method according to claim 21, wherein the data for the light-emitting degree stored in the look-up table is set such that a maximum light-emitting time and/or maximum number of light-emitting of the light-emitting unit decreases as the light-emitting area of the light-emitting unit increases for the same light-emitting level.

23. The method according to claim 20, wherein the data for the input current stored in the look-up table is set such that a maximum input current to the light-emitting unit decreases as the light-emitting area of the light-emitting unit increases for the same light-emitting level.

24. The method according to claim 20, wherein the controlling of the light-emitting area and/or light-emitting degree of the light-emitting unit according to the set light-emitting level to display the image comprises driving the OLEDs of the light-emitting unit using a value for the light-emitting degree and a value for the input current that is less than the light-emitting degree and input current values stored in the look-up table for a selected light-emitting level.

25. The method according to claim 17, wherein the setting of the light-emitting level comprises classifying and setting light-emitting levels according to power consumption of the light-emitting unit when setting the light-emitting levels.

26. A mobile communication terminal comprising:

an organic light-emitting display device including

a light-emitting unit having a plurality of OLEDs to emit light,

a light-emitting level setting unit, wherein the light-emitting level setting unit sets a light-emitting level according to a light-emitting area and/or a change in a light-emitting degree of the light-emitting unit,

a look-up table in which data for the light-emitting degree of the light-emitting unit that corresponds to each light-emitting area for each light-emitting level is set and stored according to the light-emitting level set by the light-emitting level setting unit, and

a light-emitting control unit capable of controlling the light-emitting area and the light-emitting degree of the light-emitting unit depending on a light-emitting level with reference to the data set on the look-up table;

a communication element to perform communication with the outside; and

a controller to control the communication element and the organic light-emitting display device.

27. A mobile communication terminal comprising:

an organic light-emitting display device including;

a light-emitting unit having a plurality of OLEDs to emit light,

a light-emitting level setting unit, wherein the light-emitting level setting unit sets a light-emitting level depending on a light-emitting area and/or a change in a light-emitting degree of the light-emitting unit,

a look-up table in which data for the light-emitting degree of the light-emitting unit that corresponds to each light-emitting area for each light-emitting level is set and stored according to the light-emitting level set by the light-emitting level setting unit, and

a light-emitting control unit capable of controlling the light-emitting area and the light-emitting degree of the light-emitting unit according to a light-emitting level with reference to the data set on the look-up table; and

a controller capable of transmitting image signals to the organic light-emitting display device.