Image processing method of OLED display device

• US 10,127,851 B2
• Filed: 01/28/2015
• Issued: 11/13/2018
• Est. Priority Date: 02/24/2014
• Status: Active Grant

• Current Assignee: LG Electronics, Inc. (LG Corporation)
• Original Assignee: LG Electronics, Inc. (LG Corporation)
• Inventors: Kim, Jung Hwan, Lee, Seung Hyun, Park, Myung Jin, Baek, Seung Chan, Moon, Seong Hak
• Primary Examiner(s): Hong, Richard
• Application Number:
  US15/120,253
• Publication Number:
  US 20170069242A1
• Time in Patent Office: 1,385 Days
• CPC Class Codes: G09G 2300/0452 Details of colour pixel setup, e.g. pixel composed of a red, a blue and two green components
• CPC Class Codes: G09G 2310/08 Details of timing specific for flat panels, other than clock recovery
• CPC Class Codes: G09G 2320/0233 Improving the luminance or brightness uniformity across the screen
• CPC Class Codes: G09G 2320/0271 Adjustment of the gradation levels within the range of the gradation scale, e.g. by redistribution or clipping
• CPC Class Codes: G09G 2320/043 Preventing or counteracting the effects of ageing
• CPC Class Codes: G09G 2320/0666 for control of colour parameters, e.g. colour temperature
• 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 3/2003 Display of colours specific for liquid crystal displays G09G3/3607
• CPC Class Codes: G09G 3/3208 organic, e.g. using organic light-emitting diodes [OLED]

Abstract

Disclosed is an image processing method for reducing power consumption of an OLED display device. A method of the present invention comprises the steps of: receiving image data; determining whether a frequency of a predetermined area of the image data is lower than a predetermined reference; deciding a minimum value among a plurality of blue data values of the predetermined area when the frequency of the predetermined area is lower than the reference as a result of the determination; and changing blue data of the predetermined area on the basis of the determined minimum value.

Claims

1. An image processing method of OLED display device, the method comprising:

receiving an image data;

determining whether a frequency in a predetermined region of the image data is smaller than a threshold;

determining a minimum value out of a plurality of blue data in the predetermined region when the frequency in the predetermined region is smaller than the threshold as a result of the determination; and

changing the blue data of the predetermined region based on the determined minimum value,

wherein the predetermined region is comprised of a plurality of pixels, and the step of changing the blue data of the predetermined region based on the determined minimum value includes changing each blue data of the plurality of pixels with the minimum value.

2. The method of claim 1, further comprising displaying an image data of the predetermined region when the frequency of the predetermined region is greater than the threshold as a result of the determination.

3. The method of claim 1, further comprising displaying an image data of the predetermined region including the blue data changed in response to the changing step.

4. The method of claim 1, wherein the step of changing the blue data of the predetermined region based on the determined minimum value includes changing the blue data of the predetermined region to the minimum value en bloc.

5. The method of claim 1, wherein the step of changing the blue data of the predetermined region based on the determined minimum value includes changing the blue data of the predetermined region by differentially applying in response to a size of the each blue data based on the minimum value.

6. An image processing method of OLED display device, the method comprising:

receiving an image data;

determining whether a frequency in a predetermined region of the image data is smaller than a predetermined first threshold;

determining whether the frequency in the predetermined region is smaller than a predetermined second threshold when the frequency in the predetermined region is smaller than the predetermined first threshold, as a result of determining whether the frequency of the predetermined region of the image data is smaller than the predetermined first threshold; and

decreasing the blue data of the predetermined region by a predetermined ratio in response to a result of determining whether the frequency of the predetermined region is smaller than the predetermined second threshold.

7. The method of claim 6, further comprising displaying the image data of the predetermined region when the frequency of the predetermined region is smaller than the predetermined first threshold as a result of determining whether the frequency of the predetermined region of the image data is smaller than the predetermined first threshold.

8. The method of claim 6, wherein the step of decreasing the blue data of the predetermined region by the predetermined ratio includes decreasing the blue data of the predetermined region by a first ratio when the frequency of the predetermined region is not smaller than the predetermined second threshold, and decreasing the blue data of the predetermined region by a second ratio when the frequency of the predetermined region is smaller than the predetermined second threshold.

9. The method of claim 6, wherein the second threshold is smaller than the first threshold.

10. The method of claim 6, wherein the predetermined region is comprised of a plurality of pixels, and the step of decreasing the blue data of the predetermined region by the predetermined ratio includes decreasing each blue data in the plurality of pixels by the predetermined ratio.

11. An image processing method of OLED display device, the method comprising:

receiving an image data;

determining whether a frequency in a predetermined region of the image data is smaller than a threshold;

determining a first value of blue data corresponding to the predetermined region based on the frequency in the predetermined region; and

changing the blue data of the predetermined region based on the determined first value,

wherein the predetermined region is comprised of a plurality of pixels, and the step of changing the blue data of the predetermined region based on the determined first value includes changing each blue data of the plurality of pixels with the first value.