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US 2010/0060669 A1Published application
Brightness-adjusting device and method for display screens
AssigneeChi Mei Communication Systems, Inc.
InventorSEN-HSIANG CHENG
Life of this patent
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Abstract
A brightness-adjusting device and method for a display screen are described. Depending upon the brightness of ambient light, the display screen is either brightened or darkened and powered by either a solar cell or battery.
Claims5
A brightness-adjusting device for a display screen comprising:
- a light-sensing module for sensing an ambient brightness value;
- a storing module for storing a predetermined brightness value;
- a rechargeable battery;
- a solar cell;
- a switch;
- a backlight module electronically and selectedly connected to the rechargeable battery and solar cell by the switch;
- and
- a brightness-comparing module, an input end of the brightness-comparing module being electronically connected to the light-sensing module and the storing module, an output end of the brightness-comparing module being electronically connected to the switch, the brightness-comparing module comparing the ambient brightness value with the predetermined brightness value and transforming a comparing result into corresponding electrical signal, which is sent to the switch to turn on one of the rechargeable battery or solar cell.
5 more elements
A method of adjusting the brightness of a display screen, comprising:
- storing a predetermined brightness value;
- sensing an ambient brightness value;
- comparing the ambient brightness value with the predetermined brightness value;
- whereby:
- if the ambient brightness value is higher than the predetermined brightness value, a solar cell is used to power the display screen;
- and
- if the ambient brightness value is lower than or equal to the predetermined brightness value, a battery is used to power the display screen.
4 more elements
Dependencies are inferred from the claim text.