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Illuminating source apparatus and light-adjustable light-emitting diode control circuit

A technology of light-emitting diodes and light source devices, applied in light sources, electric light sources, lighting devices, etc., can solve problems such as difficulty in adjusting light in a wide range, and achieve the effect of improving visual noise interference

Inactive Publication Date: 2007-02-07
BEYOND INNOVATION TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, the frequency of the brightness control pulse signal CNTL can also be increased to reduce the interference caused by ripples on the power supply. The power consumption is also increasing, and the visual noise requirements are becoming more and more stringent. It is becoming more and more difficult to achieve low noise and wide-range dimming in actual production.

Method used

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  • Illuminating source apparatus and light-adjustable light-emitting diode control circuit
  • Illuminating source apparatus and light-adjustable light-emitting diode control circuit
  • Illuminating source apparatus and light-adjustable light-emitting diode control circuit

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Embodiment Construction

[0032] Please refer to image 3 As shown, it is a block diagram of a low visual noise beam density dimming control circuit 300 according to a preferred embodiment of the present invention. The low visual noise beam density dimming control circuit 300 can be used to control multiple groups of The luminous brightness of the light emitting diode 330 .

[0033] As shown in the figure, the low visual noise beam density dimming control circuit 300 includes: a brightness control pulse (pulse) generating unit 310 , an LED DC current supply unit 320 and an LED 330 . Wherein, the brightness control pulse generating unit 310 is used for receiving the brightness adjustment signal BTNS, and generating multiple groups of brightness control pulse signals CNTL1, CNTL2, . . . , CNTLN according to the brightness adjustment signal BTNS.

[0034] Wherein, each of the direct current suppliers 321, 322, . . . . IdN. These driving currents Id1, Id2, . When the colors of the light emitting diodes...

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Abstract

The invention relates to a light source and relative light-emitting diode control circuit for adjusting light. Said control circuit can be used to control the brightness of several groups of light-emitting diodes in liquid crystal display. Said control circuit comprises a control impulse generator and several light-emitting diode direct-current power source suppliers; said generator is used to receive one brightness adjusting signal, to generate several groups of brightness control impulse signals with same frequency and different phases; the working period of brightness control impulse signal is changed in one preset range based on the brightness adjustment signal; the light-emitting diode direct-current current supplier is coupled to the control impulse generator, to drive relative light-emitting diode based on the brightness control impulse signal.

Description

technical field [0001] The present invention relates to a dimming control circuit, and relates to a beam density dimming control circuit for using more than one light-emitting diode as a light source, and especially relates to a beam density dimming control circuit for using more than one light emitting diode in different colors. A plurality of light-emitting diodes are used as a beam density dimming control circuit of a light source. Background technique [0002] Using a light-emitting diode (LED) as a light source, a simple DC current drive circuit can be used to realize the system requirements of LCD backlight or general lighting. Because of the characteristics, the brightness of the light-emitting diode does not change in a linear relationship with the driving DC current, and the color will also vary with the change of the driving current. There are great obstacles in the application of dimming by adjusting the direct current driven by the light-emitting diode. [0003...

Claims

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Application Information

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IPC IPC(8): H05B37/02H05B39/04H02M3/335G02F1/133
CPCY02B20/14Y02B20/00
Inventor 余仲哲李立民
Owner BEYOND INNOVATION TECH
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