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Light emitting diode (LED) illumination device

A technology for LED lighting and light strings, which is applied to lighting devices, components of lighting devices, cooling/heating devices of lighting devices, etc. Effect

Inactive Publication Date: 2012-02-08
FOXSEMICON INTEGRATED TECHNOLOGY (SHANGHAI) INC +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, using PWM to control the color temperature of the lighting device, the circuit of the lighting device requires complex circuit designs such as AC-DC converters, DC-DC transformers, PWM driver chips and their peripheral circuits, which not only reduces the lighting efficiency but also increases the cost.

Method used

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  • Light emitting diode (LED) illumination device
  • Light emitting diode (LED) illumination device
  • Light emitting diode (LED) illumination device

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Embodiment Construction

[0014] see figure 1 , the LED lighting device 90 in the first embodiment of the present invention includes an LED light source 10, a lampshade 20 covering the periphery of the LED light source, a heat sink 30 thermally connected to the LED light source 10, and a heat sink 30 electrically connected to the LED light source 10. A connector 40 , a first adjustment button 50 and a second adjustment button 55 are connected.

[0015] The LED light source 10 includes a circular substrate 11 and a plurality of white LEDs 12 disposed on the substrate 11 . Please also see figure 2 , the white LED 12 includes a number of first LEDs 121 with a higher color temperature, such as 6500k (Kelvin, Kelvin), and a number of second LEDs 123 with a lower color temperature, such as 2800k. During specific implementation, the first LED 121 and the second LED 123 can use cold light source and warm light source respectively, so as to adjust the color temperature of the light emitted by the LED lightin...

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PUM

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Abstract

The invention relates to a light emitting diode (LED) illumination device. The device comprises a first lamp string and a second lamp string which are connected in parallel, and a variable resistor connected between the first lamp string and the second lamp string, wherein each lamp string comprises at least one LED connected in series; one part of resistance of the variable resistor is connected in series with the first lamp string, and the other part of resistance of the variable resistor is connected in series with the second lamp string; and by changing the position of a sliding sheet of the variable resistor, current which flows through one of the first lamp string and the second lamp string is increased and current which flows through the other of the first lamp string and the second lamp string is reduced, so that the color temperature of light rays of the LED illumination device is adjusted.

Description

technical field [0001] The invention relates to an illuminating device, in particular to an illuminating device using a light emitting diode. Background technique [0002] At present, as a light source, a Light Emitting Diode (LED) is widely used in various technical fields due to its characteristics of good light quality, high luminous efficiency, various colors, and fast response speed. With the improvement of urban construction and the modernization of urban life, people's requirements for outdoor light decoration such as buildings and squares, as well as indoor light decoration such as entertainment places and residential places, are gradually increasing. Therefore, the demand for using LEDs as light sources for lighting devices also gradually increased. [0003] How to create a beautiful and comfortable light environment for different illuminated spaces is an important topic in modern lighting, and color temperature is one of the most important factors affecting the co...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F21S2/00F21V23/02F21V29/00H05B37/02F21Y101/02F21V29/508F21V29/71
Inventor 赖志铭
Owner FOXSEMICON INTEGRATED TECHNOLOGY (SHANGHAI) INC