DATA DISPLAY METHOD AND DEVICE

• US 20110148906A1
• Filed: 12/22/2010
• Published: 06/23/2011
• Est. Priority Date: 12/22/2009
• Status: Active Grant

• Current Assignee: Huawei Technologies Co., Ltd. (Huawei Investment & Holding Co., Ltd.)
• Original Assignee: Samsung Electronics Co. Ltd.
• Inventors: JEONG, Young-Min, Cho, Sung-Dae
• Granted Patent: US 9,330,591 B2
• Time in Patent Office: Days
• US Class Current: 345/589
• CPC Class Codes: G09G 2320/0626 for control of overall brightness
• CPC Class Codes: G09G 2320/066 for control of contrast
• CPC Class Codes: G09G 2320/0686 with two or more screen areas displaying information with different brightness or colours
• CPC Class Codes: G09G 2330/021 Power management, e.g. power saving
• CPC Class Codes: G09G 3/2007 Display of intermediate tones
• CPC Class Codes: G09G 3/3208 organic, e.g. using organic light-emitting diodes [OLED]

Abstract

A low power display and a method for display in a display device having an Active Matrix Organic Light Emitting Diodes AMOLED panel are provided. A display window that includes content to be displayed on the AMOLED panel is determined. Luminance values of pixels constituting the display window are grasped. The pixels having luminance values that are to be adjusted are determined in accordance with a distribution degree of pixels having luminance values that are larger than a reference luminance value. The luminance values of the determined pixels are changed to the reference luminance value, and the display window is displayed on the AMOLED panel with the changed luminance values.

Claims

1. A low power display method in a display device having an Active Matrix Organic Light Emitting Diodes (AMOLED) panel, comprising the steps of:

determining a display window having content to be displayed on the AMOLED panel;

grasping luminance values of pixels constituting the display window;

determining which of the pixels have luminance values that are to be adjusted in accordance with a distribution degree of pixels having luminance values that are larger than a reference luminance value;

changing the luminance values of the determined pixels to the reference luminance value; and

displaying the display window with the changed luminance values on the AMOLED panel.

2. The low power display method as claimed in claim 1, wherein the determining step comprises:

determining a luminance value of a corresponding pixel and a representative luminance value from among luminance values of neighboring pixels that neighbor the corresponding pixel; and

when both the luminance value of the corresponding pixel and the representative luminance value are larger than the reference luminance value, determining the corresponding pixel as one of the pixels having a luminance value that is to be adjusted.

3. The low power display method as claimed in claim 2, wherein a luminance value that is most prevalent among the luminance values of the neighboring pixels is determined as the representative luminance value.

4. The low power display method as claimed in claim 3, wherein, when all of the luminance values of the neighboring pixels differ from one another, a smallest luminance value of the neighboring pixels is determined as the representative luminance value.

5. The low power display method as claimed in claim 4, wherein, when there are a plurality of luminance values having the same prevalence, a smallest luminance value from among the plurality luminance values is determined as the representative luminance value.

6. The low power display method as claimed in claim 2, wherein, when at least one of the luminance value of the corresponding pixel and the representative luminance value is below the reference luminance value, the luminance value of the corresponding pixel is maintained.

7. The low power display method as claimed in claim 2, wherein the changing step comprises adjusting a saturation of the pixels included in the display window after the luminance values of the determined pixels are changed to the reference luminance value.

8. A display device comprising:

an Active Matrix Organic Light Emitting Diodes (AMOLED) panel;

a driving unit for driving the AMOLED; and

a display unit for determining a display window having content to be displayed on the AMOLED panel, grasping luminance values of pixels that constitute the display window, determining which of the pixels have luminance values that are to be adjusted in accordance with a degree of distribution of pixels having luminance values that are larger than a reference luminance value, and controlling the driving unit to change the luminance values of the determined pixels to the reference luminance value and to display the display window with the changed luminance values on the AMOLED panel.

9. The display device as claimed in claim 8, wherein the control unit determines a luminance value of a corresponding pixel and a representative luminance value from among luminance values of neighboring pixels that neighbor the corresponding pixel, and when both the luminance value of the corresponding pixel and the representative luminance value are larger than the reference luminance value, the control unit determines the corresponding pixel as one of the pixels having a luminance value that is to be adjusted.

10. The display device as claimed in claim 9, wherein a luminance value that is most prevalent among the luminance values of the neighboring pixels is determined as the representative luminance value.

11. The display device as claimed in claim 10, wherein, when all the luminance values of the neighboring pixels differ from one another, a smallest luminance value of the neighboring pixels is determined as the representative luminance value.

12. The display device as claimed in claim 11, wherein, when there are a plurality of luminance values having the same prevalence, a smallest luminance value from among the plurality of luminance values is determined as the representative luminance value.

13. The display device as claimed in claim 9, wherein, when at least one of the luminance value of the corresponding pixel and the representative luminance value is below the reference luminance value, the luminance value of the corresponding pixel is maintained.

14. The display device as claimed in claim 9, wherein the control unit adjusts a saturation of the pixels included in the display window after the luminance values of the determined pixels are changed to the reference luminance value.

15. The display device as claimed in claim 9, wherein the neighboring pixels are eight pixels that surround the corresponding pixel.