Automatic brightness regulation circuit of display equipment

A technology of automatic adjustment and voltage adjustment circuit, applied in static indicators, cathode ray tube indicators, instruments, etc., can solve problems such as inconvenience and troublesome adjustment of brightness.

Inactive Publication Date: 2008-06-11
HONG FU JIN PRECISION IND (SHENZHEN) CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The existing liquid crystal display brightness adjustment circuit is arranged in the liquid crystal display and is provided with a number of adjustment buttons on its shell, and the user needs to manually operate the buttons to adjust the brightness of the display, which is not very convenient, especially for using notebooks on the road. For computer users, it is more troublesome to adjust the brightness due to the constant change of ambient brightness

Method used

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  • Automatic brightness regulation circuit of display equipment
  • Automatic brightness regulation circuit of display equipment
  • Automatic brightness regulation circuit of display equipment

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Embodiment Construction

[0012] Please refer to FIG. 1 and FIG. 2 together. The automatic display brightness adjustment circuit of the present invention is used to automatically adjust the brightness of a display. Its preferred embodiment includes a voltage adjustment circuit 10 and a PWM (Pulse Width Modulation, pulse width modulation) signal generation Circuit 20. The PWM signal generating circuit 20 includes an integrating circuit 22 , a comparing circuit 24 and a switching circuit 26 .

[0013] The voltage regulating circuit 10 includes a light source detection element (such as a photoresistor 11), a first resistor 12, a second resistor 13, a third resistor 14, a first capacitor 15 and a first DC power supply terminal Vcc. The first DC power supply terminal Vcc is sequentially connected to the photoresistor 11 and the first resistor 12 and then grounded, the first capacitor 15 is connected in parallel to the first resistor 12, and the photoresistor 11 is connected to the first resistor 12 in para...

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Abstract

The invention relates to an displayer illumination automatic adjusting circuit for adjusting the illumination of the displayer automatically, which comprises the following parts: a voltage adjusting circuit with a light source detecting element which detects the illumination of outer environment and outputs a voltage signal changing with the outer environment illumination through the light source detecting element; and a pulse width modulating signal generating circuit which is used for receiving the voltage signal and outputting the pulse width modulating signal changing with the voltage signal to the illumination control circuit of the displayer for controlling the illumination of the displayer. The illumination automatic adjusting circuit of displayer can automatically adjust the illumination of the displayer with the change of the environment illumination.

Description

technical field [0001] The invention relates to a circuit for adjusting the brightness of a display. Background technique [0002] With the increasing popularity of liquid crystal displays, the application of liquid crystal displays becomes more and more extensive. When using a liquid crystal display, the human eye is more sensitive to the brightness of the surrounding environment of the display, especially a sudden change in brightness will have a negative impact on human vision, which is especially prominent for notebook computer users. In order to achieve the most comfortable visual effect, users need to adjust the brightness of the display to adapt to changes in the environment. [0003] The existing liquid crystal display brightness adjustment circuit is arranged in the liquid crystal display and is provided with a number of adjustment buttons on its shell, and the user needs to manually operate the buttons to adjust the brightness of the display, which is not very con...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G09G3/36G09G3/34G09G3/20G09G5/10G02F1/13357G02F1/1335
Inventor 陈海云甘小林何友光
Owner HONG FU JIN PRECISION IND (SHENZHEN) CO LTD
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