Method of driving a display panel, display panel driving apparatus for performing the method and display apparatus having the display panel driving apparatus

• US 9,489,909 B2
• Filed: 08/19/2014
• Issued: 11/08/2016
• Est. Priority Date: 12/19/2013
• Status: Expired due to Fees

• Current Assignee: Samsung Display Company Limited (Samsung Electronics Co. Ltd.)
• Original Assignee: Samsung Display Company Limited (Samsung Electronics Co. Ltd.)
• Inventors: Hong, Seok-Ha, Goh, Joon-Chul, You, Bong-Hyun, Jang, Dae-Gwang
• Primary Examiner(s): Zhou, Hong
• Application Number:
  US14/463,577
• Publication Number:
  US 20150179117A1
• Time in Patent Office: 812 Days
• Field of Search: 345/6, 345 87-102, 345/690, 345/204, 345/419
• US Class Current: 1/1
• CPC Class Codes: G09G 2320/0276 for the purpose of adaptation to the characteristics of a display device, i.e. gamma correction
• CPC Class Codes: G09G 2320/028 by changing the viewing angle properties, e.g. widening the viewing angle, adapting the viewing angle to the view direction
• CPC Class Codes: G09G 2320/0673 for control of gamma adjustment, e.g. selecting another gamma curve
• CPC Class Codes: G09G 2320/068 for control of viewing angle adjustment
• CPC Class Codes: G09G 2320/0686 with two or more screen areas displaying information with different brightness or colours
• CPC Class Codes: G09G 2354/00 Aspects of interface with display user
• CPC Class Codes: G09G 3/3648 using an active matrix G09G3/367 - G09G3/3696 take precedence

Abstract

A method of driving a display panel includes detecting a position of a viewer to output a viewer position detection signal, determining whether the position of the viewer is in a first area or in a second area based on the viewer position detection signal to output a viewer position signal, and driving a unit pixel of the display panel using a plurality of gamma values according to the viewer position signal. The first area is less than a reference distance, and the second area is not less than the reference distance. Thus, side visibility of a display apparatus may be improved.

Claims

1. A method of driving a display panel by a display panel driving apparatus comprising a viewer position determining part and a data driving part, the method comprising:

detecting by the viewer position determining part a position of a viewer to output a viewer position detection signal;

determining by the viewer position determining part whether the viewer is less than a reference distance from the display panel or not less than the reference distance from the display panel based on the viewer position detection signal; and

driving by the data driving part a unit pixel of the display panel using a single gamma value when the viewer is determined by the viewer position determining part to be less than the reference distance from the display panel and using a plurality of gamma values when the viewer is determined by the viewer position determining part to be not less than the reference distance from the display panel.

2. The method of claim 1, wherein the driving of the unit pixel using the plurality of gamma values comprises:

driving a first sub pixel of the unit pixel and a fourth sub pixel of the unit pixel using a first gamma value; and

driving a second sub pixel of the unit pixel and a third sub pixel of the unit pixel using a second gamma value.

3. The method of claim 1, wherein the driving of the unit pixel using the plurality of gamma values comprises:

driving a first sub pixel of the unit pixel using a first gamma value and a third gamma value;

driving a second sub pixel of the unit pixel using a second gamma value and a fourth gamma value;

driving a third sub pixel of the unit pixel using the first gamma value and the third gamma value; and

driving a fourth sub pixel of the unit pixel using the second gamma value and the fourth gamma value.

4. The method of claim 3, wherein the first gamma value is a white color gamma value, the third gamma value is a black color gamma value, and the second gamma value and the fourth gamma value are between the first gamma value and the third gamma value.

5. The method of claim 1, wherein the driving of the unit pixel using the plurality of gamma values comprises:

driving a first sub pixel of the unit pixel using a first gamma value and a fifth gamma value less than the first gamma value;

driving a second sub pixel of the unit pixel using a second gamma value and a sixth gamma value less than the second gamma value;

driving a third sub pixel of the unit pixel using a third gamma value and a seventh gamma value less than the third gamma value; and

driving a fourth sub pixel of the unit pixel using a fourth gamma value and an eighth gamma value less than the fourth gamma value.

6. The method of claim 5, wherein the first gamma value is a white color gamma value, the seventh gamma value is a black color gamma value, and the second gamma value, the third gamma value, and the fourth gamma value are between the first gamma value and the seventh gamma value.

7. The method of claim 1, wherein the driving of the unit pixel using the plurality of gamma values comprises:

driving the unit pixel using a first gamma value and a third gamma value during an odd-numbered frame; and

driving the unit pixel using a second gamma value and a fourth gamma value during an even-numbered frame.

8. The method of claim 7, wherein the first gamma value is a white color gamma value, the third gamma value is a black color gamma value, and the second gamma value and the fourth gamma value are between the first gamma value and the third gamma value.

9. The method of claim 1, wherein the driving of the unit pixel using the plurality of gamma values comprises:

driving a first sub pixel of the unit pixel using a first gamma value and a fifth gamma value less than the first gamma value, and driving a second sub pixel of the unit pixel using a third gamma value and a seventh gamma value less than the third gamma value during an odd-numbered frame; and

driving the first sub pixel of the unit pixel using a second gamma value and a sixth gamma value less than the second gamma value, and driving the second sub pixel of the unit pixel using a fourth gamma value and an eighth gamma value less than the fourth gamma value during an even-numbered frame.

10. The method of claim 1, wherein the driving of the unit pixel using the plurality of gamma values comprises:

driving a first sub pixel of the unit pixel using a first gamma value and a third gamma value, and driving a second sub pixel of the unit pixel using a second gamma value and a fourth gamma value during an odd-numbered frame; and

driving the first sub pixel of the unit pixel using a fifth gamma value and a seventh gamma value, and driving the second sub pixel of the unit pixel using a sixth gamma value and an eighth gamma value during an even-numbered frame.

11. The method of claim 10, wherein the first gamma value is a white color gamma value, the seventh gamma value is a black color gamma value, and the second gamma value, the third gamma value, the fourth gamma value, the fifth gamma value, the sixth gamma value, and the eighth gamma value are between the first gamma value and the seventh gamma value.

12. The method of claim 1, wherein the driving of the unit pixel using the plurality of gamma values comprises:

driving a first sub pixel of the unit pixel using a first gamma value and a ninth gamma value less than the first gamma value, driving a second sub pixel of the unit pixel using a second gamma value and a tenth gamma value less than the second gamma value, driving a third sub pixel of the unit pixel using a third gamma value and an eleventh gamma value less than the third gamma value, and driving a fourth sub pixel of the unit pixel using a fourth gamma value and a twelfth gamma value less than the fourth gamma value during an odd-numbered frame; and

driving the first sub pixel of the unit pixel using a fifth gamma value and a thirteenth gamma value less than the fifth gamma value, driving the second sub pixel of the unit pixel using a sixth gamma value and a fourteenth gamma value less than the sixth gamma value, driving the third sub pixel of the unit pixel using a seventh gamma value and a fifteenth gamma value less than the seventh gamma value, and driving the fourth sub pixel of the unit pixel using an eighth gamma value and a sixteenth gamma value less than the eighth gamma value during an even-numbered frame.

13. The method of claim 12, wherein the first gamma value is a white color gamma value, the fifteenth gamma value is a black color gamma value, and the second gamma value, the third gamma value, the fourth gamma value, the fifth gamma value, the sixth gamma value, the seventh gamma value, and the eighth gamma value are between the first gamma value and the fifteenth gamma value.

14. The method of claim 1, wherein the driving of the unit pixel using the plurality of gamma values comprises:

driving the unit pixel using a first gamma value during a first frame;

driving the unit pixel using a second gamma value during a second frame;

driving the unit pixel using a third gamma value during a third frame; and

driving the unit pixel using a fourth gamma value during a fourth frame.

15. A display panel driving apparatus for driving a display panel, the display panel driving apparatus comprising:

a viewer position determining part configured to

detect a position of a viewer to output a viewer position detection signal, and

determine whether the viewer is less than a reference distance from the display panel or not less than the reference distance from the display panel based on the viewer position detection signal; and

a data driving part configured to drive a unit pixel of the display panel using a single gamma value when the viewer is determined by the viewer position determining part to be less than the reference distance from the display panel and using a plurality of gamma values when the viewer is determined by the viewer position determining part to be not less than the reference distance from the display panel.

16. A display apparatus comprising:

a display panel configured to display an image and comprising a gate line and a data line; and

a display panel driving apparatus comprising

a gate driving part configured to output a gate signal to the gate line,

a viewer position determining part configured to

detect a position of a viewer viewing the image to output a viewer position detection signal, and

determine whether the viewer is less than a reference distance from the display panel or not less than the reference distance from the display panel based on the viewer position detection signal, and

a data driving part configured to drive a unit pixel of the display panel using a single gamma value when the viewer is determined by the viewer position determining part to be less than the reference distance from the display panel and using a plurality of gamma values when the viewer is determined by the viewer position determining part to be not less than the reference distance from the display panel.