Image compensation apparatus and method

• US 8,040,342 B2
• Filed: 06/29/2007
• Issued: 10/18/2011
• Est. Priority Date: 07/04/2006
• Status: Active Grant

• Current Assignee: Samsung Electronics Co. Ltd.
• Original Assignee: Samsung Electronics Co. Ltd.
• Inventors: Choe, Won-hee
• Primary Examiner(s): OSORIO, RICARDO
• Application Number:
  US11/770,835
• Publication Number:
  US 20080122833A1
• Time in Patent Office: 1,572 Days
• Field of Search: 345/102, 345211-214
• US Class Current: 345/214
• CPC Class Codes: G06T 5/40 using histogram techniques
• CPC Class Codes: G06T 5/92 based on global image properties
• 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 2320/0606 Manual adjustment
• CPC Class Codes: G09G 2320/0646 Modulation of illumination source brightness and image signal correlated to each other
• CPC Class Codes: G09G 2320/0673 for control of gamma adjustment, e.g. selecting another gamma curve
• CPC Class Codes: G09G 2330/021 Power management, e.g. power saving
• CPC Class Codes: G09G 2360/144 the light being ambient light
• CPC Class Codes: G09G 3/3406 Control of illumination source illumination devices structurally associated with liquid crystal cells G02F1/1336
• CPC Class Codes: H04N 5/20 Circuitry for controlling amplitude response

Abstract

An image compensation apparatus and method is provided. The image compensation apparatus includes a power control module which controls a light emitting unit according to a power control input signal input thereto by a user and provides power reduction information corresponding to the power control input signal, a control parameter generation module which determines a threshold based on the power reduction information, an image compensation module which divides input image information according to the threshold and converts the input image information according to image control information, and an output module which outputs image information obtained by the conversion performed by the image compensation module.

Claims

1. An image compensation apparatus comprising:

a power control module which controls a light emitting unit according to a power control input signal input thereto by a user and provides power reduction information corresponding to the power control input signal;

a control parameter generation module which determines a threshold based on the power reduction information;

an image compensation module which divides input image information according to the threshold and converts the input image information according to image control information; and

an output module which outputs image information obtained by the conversion performed by the image compensation module,

wherein the image compensation module divides an original image into a first image information section and a second image information section according to the threshold, maintains image information belonging to the first image information section, and converts image information belonging to the second image information section according to the image control information.

2. The image compensation apparatus of claim 1, wherein the image control information increases the input image information by a predetermined amount.

3. The image compensation apparatus of claim 1, wherein the image compensation module does not convert the input image information less than the threshold.

4. The image compensation apparatus of claim 1, wherein the image compensation module converts the input image information by increasing the input image information less than the threshold by a predetermined amount.

5. The image compensation apparatus of claim 1, wherein the image control information increases the input image information by a predetermined amount.

6. An image compensation method comprising:

controlling a light emitting unit according to a power control input signal input thereto by a user and providing power reduction information corresponding to the power control input signal;

determining a threshold based on the power reduction information;

dividing input image information according to the threshold and converting the input image information according to image control information; and

outputting image information obtained by the conversion performed in on the input image information,

wherein the dividing of the input image information comprises

dividing an original image into a first image information section and a second image information section according to the threshold;

maintaining image information belonging to the first image information section; and

converting image information belonging to the second image information section according to the image control information.

7. The image compensation method of claim 6, wherein the image control information increases the input image information by a predetermined amount.

8. The image compensation method of claim 6, wherein the dividing of the input image information comprises not compensating for the input image information less than the threshold.

9. The image compensation method of claim 6, wherein the dividing of the input image information comprises converting the input image information by increasing the input image information less than the threshold by a predetermined amount.

10. The image compensation method of claim 6, wherein the image control information increases the input image information by a predetermined amount.