Supply apparatus for light modulation of LED

A power supply device and dimming technology, which is applied to output power conversion devices, light sources, electric light sources, etc., can solve the problems of ineffective energy saving, flickering, and inability to adjust the brightness of LEDs, and achieve the effect of facilitating life and saving energy.

Active Publication Date: 2008-06-18
CIVILIGHT SHENZHEN SEMICON LIGHTING
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] At present, the known LED driving power mostly uses photocouplers. This type of LED driving power has the following disadvantages: when the LED driving power is connected in series with the thyristor dimmer, the LED flickers, and when the thyristor is turned to dim When the slide switch of the dimmer, the brightness of the LED does not change significantly, and the function of adjusting the brightness of the LED with the thyristor dimmer cannot be realized.
Therefore, when the environment changes, the brightness of the LED cannot be adjusted, and in an environment with low brightness, it cannot effectively save energy.

Method used

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  • Supply apparatus for light modulation of LED
  • Supply apparatus for light modulation of LED
  • Supply apparatus for light modulation of LED

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Embodiment Construction

[0016] As shown in Figure 1 and Figure 2, in an embodiment of a power supply device for LED dimming in the present invention, the labels in Figure 2 are as follows: 1. Anti-surge resistance, 2. Overcurrent fuse, 3. Rectifier bridge, 4. Starting resistor, 5. Starting resistor, 6. Switching transistor, 7. Timing resistor, 8. Timing capacitor, 9. Schottky diode, 10. Zener diode, 11. Voltage regulator isolation capacitor, 12. Positive feedback winding, 13. Negative feedback transistor, 14. Negative feedback diode, 15. Power limiting resistor, 16. Absorbing diode, 17. Absorbing current limiting resistor, 18. Absorbing capacitor, 19. Absorbing resistor, 20. Primary winding, 21 .Secondary winding, 22. Secondary rectifier tube, 23. Secondary filter capacitor, 24. Dummy load resistor, 25. Current limiting resistor, 26. Light-emitting diode, 27. Light-emitting diode, 28. Light-emitting diode.

[0017] The specific implementation method is to add the voltage of the commercial power (Fig....

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Abstract

The invention relates to a power supply device used for LED dimming, which is characterized by comprising a SCR dimmer and a power supply serial connected with the SCR dimmer. The power supply comprises an input safety device and a rectifier both of which are used for converting the voltage changed by the SCR dimmer into DC voltage. The high-voltage end after rectification is connected with the collector of a switch triode through a primary transformer. The emitter of the switch triode is connected with a power restriction resistance and a negative feedback system. The base of the switch triode is connected with two starting resistances and a positive feedback system. The primary transformer is sequentially connected with a secondary transformer, a secondary waves filtering rectifier and an LED load. The invention can adjust the brightness of the LED by the SCR dimmer and solve the technical problem that the LED driving power in prior art can not adjust light by the SCR dimmer. So, people can adjust the brightness of the LED lamp freely according to needs. Thereby, the invention not only facilitates the life of people but also saves energy.

Description

technical field [0001] The present invention relates to a power supply device, more specifically, to a power supply device for LED dimming. Background technique [0002] At present, the known LED driving power mostly uses photocouplers. This type of LED driving power has the following disadvantages: when the LED driving power is connected in series with the thyristor dimmer, the LED flickers, and when the thyristor is turned to dim When the slide switch of the dimmer, the brightness of the LED does not change significantly, and the function of adjusting the brightness of the LED with the thyristor dimmer cannot be realized. Therefore, when the environment changes, the brightness of the LED cannot be adjusted, and in an environment where the brightness is relatively low, it cannot effectively save energy. Contents of the invention [0003] The technical problem to be solved by the present invention is to provide a power supply device for LED dimming, aiming at the above-me...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H05B33/08H02M3/335H05B44/00
CPCY02B20/346Y02B20/30
Inventor 薛信燊
Owner CIVILIGHT SHENZHEN SEMICON LIGHTING
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