Controller of light-emitting diode and controlling method thereof

A technology of light-emitting diodes and control devices, applied in the direction of cathode ray tube indicators, instruments, static indicators, etc., can solve the problems of unbalanced color mixing results, deviation of mixed colors, etc.

Inactive Publication Date: 2008-07-16
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] In addition, in the application of color mixing with LEDs of different colors, for example, white LEDs made of red, green, and blue LEDs may be mixed due to the aging of a certain color LED or other variation factors during operation, resulting in the final color error. The result is unbalanced and deviates from the colors that were originally intended to be mixed

Method used

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  • Controller of light-emitting diode and controlling method thereof
  • Controller of light-emitting diode and controlling method thereof
  • Controller of light-emitting diode and controlling method thereof

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Embodiment Construction

[0036] FIG. 1 is a block diagram of a preferred embodiment of the LED control device of the present invention. As shown in FIG. 1 , the LED control device 10 includes a sensing unit 11 , a control unit 12 and a driving unit 13 . The sensing unit 11 is used for detecting the light intensity of an LED (located in the driving unit 13 , not shown in FIG. 1 ), and outputting a corresponding sensing signal. In one embodiment, the sensing unit 11 uses a photodiode (not shown) to detect the light intensity of the LED.

[0037] The control unit 12 is coupled to the sensing unit 11 , and can judge whether the light intensity of the LED meets a set value according to the sensing signal output by the sensing unit 11 to generate a control signal and send it to the driving unit 13 . When the light intensity meets the set value, the control unit 12 keeps outputting the original control signal, so that the driving unit 13 maintains the light intensity that meets the set value. However, when...

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Abstract

A method for controlling LED includes generating a control signal to drive a LED for sensing a light intensity value of LED so as to selectively regulate said control signal based on said value and then to dynamically regulate light intensity of LED. In the method, a simple driving circuit design is applied to realize aim of regulating current flowing through LED dynamically.

Description

technical field [0001] The invention relates to a light-emitting diode (LED), in particular to an LED control device and a method thereof. Background technique [0002] In recent years, with the rapid development of light-emitting diode (LED) technology, the luminous efficiency of LED is getting better and better, and the manufacturing cost is gradually reduced, so its application range is becoming wider and wider. However, LEDs will reduce brightness due to aging due to long-term operation. This will also cause poor color saturation in some applications, such as projectors that use LEDs as light sources. At this point, it may be necessary to dynamically adjust the current flowing through the LED to change its brightness. [0003] In addition, in the application of color mixing with LEDs of different colors, for example, white LEDs made of red, green, and blue LEDs may be mixed due to the aging of a certain color LED or other variation factors during operation, resulting in...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G09G3/14G09G5/02
Inventor 陈正芳
Owner HONG FU JIN PRECISION IND (SHENZHEN) CO LTD
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