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Screen brightness control

A technology for controlling system and brightness, applied to TV system components, TVs, instruments, etc., can solve problems such as multi-power and consumption

Inactive Publication Date: 2003-08-20
NEC CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Backlit LCD monitors improve the clarity of the LCD screen, but consume more power than regular LCD monitors

Method used

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  • Screen brightness control
  • Screen brightness control
  • Screen brightness control

Examples

Experimental program
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Embodiment Construction

[0011] refer to figure 1 , the backlight liquid crystal display 100 includes a liquid crystal display 101 and a backlight panel 102 that illuminates the rear of the LCD screen. The backlight panel 102 may be an electroluminescent panel placed behind the LCD screen.

[0012] The background illumination control system is provided with a light sensor 103 that detects the ambient illumination of the LCD screen within a controlled time interval. The light sensor 103 outputs the ambient illuminance data to the optimal brightness calculator 104. The 104 calculates the optimal intensity of the brightness at which the user can read the information on the background lighting screen without causing eye fatigue. This calculation is performed in The controlled time interval is executed according to a predetermined expression. When receiving optimum brightness data from optimum brightness calculator 104, drive current controller 105 generates optimum drive current setting data that causes...

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PUM

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Abstract

A screen-illuminating panel for a backlit LCD is intermittently adjusted to an optimal brightness level varying depending on ambient illumination at predetermined time intervals. The screen-illuminating panel is driven to hold the optimal brightness level while the screen-illuminating panel is not adjusted, a timer is used to detect a lapse of a time period to produce a timing signal after a trigger signal is received, and a power controller supplies power for brightness adjustment when the timing signal is received from the timer and outputs the trigger signal to the timer when the screen-illuminating panel has been adjusted.

Description

technical field [0001] The present invention generally relates to screen brightness control, and particularly relates to a control method for a screen lighting panel. Background technique [0002] Backlit LCD (Liquid Crystal Display) displays have been widely used in portable or laptop computers and small battery powered electronic devices. In order to further improve the clarity of the LCD screen, a backlight LCD display is proposed, which can automatically adjust the brightness of the screen according to the ambient illumination. [0003] The backlighting LCD system of Japanese Unexamined Patent Application No. 5-265401 is provided with a light sensor and a brightness controller. The brightness controller calculates the optimum brightness according to the brightness data received from the light sensor, and then controls the current supply device provided to the backlight panel to achieve the calculated optimum brightness on the LCD screen. [0004] Backlit LCD displays i...

Claims

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Application Information

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IPC IPC(8): G02F1/133G09G3/18G09G3/34
CPCG09G2330/021G09G2320/0626G09G3/3406G09G2360/144
Inventor 铃木高晴
Owner NEC CORP