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Light modulating device for light emitting diode, light modulating method related thereto and light emitting device related thereto

A technology of light-emitting diodes and dimming devices, which is applied to lighting devices, components of lighting devices, light sources, etc., and can solve the problems of increasing costs and being unable to directly replace electric lighting systems

Inactive Publication Date: 2010-02-24
NOVATEK MICROELECTRONICS CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the existing dimming device system 1 needs the microcontroller 18 to control the dimming pulse, which increases the cost and cannot directly replace the existing electric lamp system, so there is a need for improvement

Method used

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  • Light modulating device for light emitting diode, light modulating method related thereto and light emitting device related thereto
  • Light modulating device for light emitting diode, light modulating method related thereto and light emitting device related thereto
  • Light modulating device for light emitting diode, light modulating method related thereto and light emitting device related thereto

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Embodiment Construction

[0033] Please refer to Figure 2A , Figure 2A It is a schematic diagram of a light emitting device 2 according to Embodiment 1 of the present invention. The light emitting device 2 includes a bridge rectifier 3 , a power supply terminal 4 , a voltage stabilizing capacitor 5 , a light emitting diode 6 , a driving stage 7 , a pulse width modulation controller 8 and a dimming device 9 .

[0034] The bridge rectifier 3 is used to convert an AC power VIN provided by the power terminal 4 into a DC power VDC, and provide the DC power VDC to the driving stage 7 . The stabilizing capacitor 5 is used for stabilizing the power supply. The driving stage 7 is coupled between the power terminal 4 and the LED 6 for driving the LED 6 . The pulse width modulation controller 8 is coupled to the driving stage 7 for generating a pulse width modulation signal VPWM. The driving stage 7 changes the current flowing through the LED 6 according to the pulse width modulation signal VPWM. In additi...

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PUM

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Abstract

The invention discloses a light modulating device for light emitting diode, which comprises a first switch, a detection unit and a brightness modulation unit, wherein the switch is coupled with a power supply end, and the power supply end is used for providing the power supply of the light emitting diode; the detection unit is coupled with the switch and is used for judging the closing condition of the switch to generate a detection result; and the brightness modulation unit is coupled with the detection unit and is used for modulating the brightness of the light of the light emitting diode according to the detection result.

Description

technical field [0001] The present invention relates to a dimming device for a light-emitting diode and its related dimming method and lighting device, in particular to a dimming device and its related dimming method and lighting device which can save costs and directly replace the existing electric lamp system light emitting device. Background technique [0002] At present, light-emitting diodes have been more and more widely used in the market because of their energy-saving benefits and advantages. In the prior art, a dimming signal (Dimming) is usually generated by a microcontroller, and the signal will be digitally processed by a pulse width modulation controller (Pulse Width Modulation, PWM) output signal to adjust the brightness of the light-emitting diode. See below for the method. [0003] Please refer to figure 1 , figure 1 It is a schematic diagram of an existing system 1 including a dimming device. The dimming device system 1 is used to drive an LED circuit 1...

Claims

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Application Information

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IPC IPC(8): H05B37/02F21V23/00F21Y101/02
Inventor 洪哲民刘翼德颜志仁谢致远
Owner NOVATEK MICROELECTRONICS CORP
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