Apparatus and method for reducing power consumption by adjusting backlight and adapting visual signal

• US 20060071899A1
• Filed: 04/25/2003
• Published: 04/06/2006
• Est. Priority Date: 04/26/2002
• Status: Abandoned Application

• Current Assignee: Electronics and Telecommunications Research Institute
• Original Assignee: Electronics and Telecommunications Research Institute
• Inventors: Hong, Jin Woo, Kim, Hae Kwang, Kim, Jin Woong, Cho, Nam Ik, Nam, Je Ho, Kim, Hyoung Joong, Kim, Man Bae, Kim, Jae Joon, Chang, Nae Hyuck, Kim, Rin Chul
• Application Number:
  US10/511,238
• Publication Number:
  US 20060071899A1
• Time in Patent Office: Days
• US Class Current: 345/102
• CPC Class Codes: G09G 2320/0606 Manual adjustment
• CPC Class Codes: G09G 2320/0626 for control of overall brightness
• CPC Class Codes: G09G 2320/0646 Modulation of illumination source brightness and image signal correlated to each other
• CPC Class Codes: G09G 2320/066 for control of contrast
• CPC Class Codes: G09G 2330/021 Power management, e.g. power saving
• CPC Class Codes: G09G 3/3406 Control of illumination source illumination devices structurally associated with liquid crystal cells G02F1/1336

Abstract

Backlight intensity is adjusted in a terminal. An adaptation apparatus transmits a visual signal after optimizing brightness or contrast of the visual signal based on the backlight intensity information which is related to the adjusted backlight intensity, so that the user can enjoy digital item with reduced power consumption of the terminal.

Claims

1. An apparatus for controlling a backlight of a liquid crystal display (LCD) and processing visual signals, comprising:

a generation means for generating on adjusted backlight intensity information to reduce the power consumption of an end user terminal having the LCD; and

an adaptation means for adapting brightness and/or contrast of the visual signal based on the backlight intensity information and displaying the adapted visual signal on the LCD.

2. The apparatus as recited in claim 1, wherein if the backlight intensity information indicates that the backlight is adjusted from the original luminance value Y to a value Y′

, the adaptation means adapts the original pixel value of the visual signal proper for the original luminance value Y to a pixel value proper for the adjusted luminance value Y′

.

3. The apparatus as recited in claim 1, wherein the adaptation means is included in a system that provides the visual signal to the end user terminal.

4. The apparatus as recited in claim 1, wherein the generation means for generating adjusted backlight intensity information controls the backlight intensity dynamically according to information on the visual signal displayed on the LCD.

5. A method for controlling a backlight of an LCD and processing visual signals, comprising the steps of:

a) generating adjusted LCD backlight intensity information to reduce the power consumption of an end user terminal having the LCD; and

b) adapting brightness and/or contrast of the visual signal based on the backlight intensity information and displaying the adapted visual signal on the LCD.

6. The method as recited in claim 5, wherein if the adjusted backlight intensity information indicates that the backlight is adjusted from the original luminance value Y to a value Y′

, the original pixel value of the visual signal proper for the original luminance value Y is adapted to a pixel value proper for the adjusted luminance value Y′

in the step b).

7. The apparatus as recited in claim 5, wherein the step b) is performed in a system that provides the visual signal to the end user terminal.

8. The apparatus as recited in claim 5, wherein the step a) includes the step of:

a1) adjusting the backlight intensity dynamically according to information on the visual signal displayed on the LCD.