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Light-emitting device with temperature compensation

A light-emitting device and temperature compensation technology, applied in lighting devices, electrical components, electroluminescent light sources, etc., can solve problems such as inconvenient use and unstable colors

Active Publication Date: 2019-07-30
EPISTAR CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When the warm white light-emitting device composed of red light and blue light-emitting diodes is used in the lighting field, due to the different heat and cold coefficients of the red light and blue light-emitting diodes, the lighting system will appear when it is initially turned on and stabilized. The color of the light is unstable, causing inconvenience in use

Method used

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  • Light-emitting device with temperature compensation
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  • Light-emitting device with temperature compensation

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Embodiment Construction

[0064] The following embodiments will illustrate the concepts of the present invention with accompanying drawings. In the drawings or descriptions, similar or identical parts use the same symbols, and in the drawings, the shape or thickness of elements may be enlarged or reduced. It should be noted that elements not shown or described in the figure may be in forms known to those skilled in the art.

[0065] Figure 2AA schematic circuit diagram of the first embodiment of the light emitting device of the present invention is shown. The light emitting device 200 includes a first LED group 202 , a second LED group 204 , and a temperature compensation element. The temperature compensation element includes a first resistor, such as a thermistor 206 with a positive temperature coefficient. The first LED group 202 includes a first number of LED units 208 connected in series, the second LED group 204 includes a second number of LED units 208 connected in series, and the first LED gro...

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Abstract

The present application provides a light-emitting device comprising a first light-emitting diode group, a second light-emitting diode group that is connected in parallel to the first light-emitting diode group, a temperature compensation element electrically connected to the second light-emitting diode group, a first switching element connected between the secong light-emitting diode group and thetemperature compensation element. By controlling the resistance of the temperature compensation element, the attenuation of the optical output power of the second light-emitting diode group in the temperature rise due to a hot-cold coefficient, and thus a function of temperature compensation is fulfilled.

Description

[0001] This invention is a divisional application of the following patent application: application number: 201410044257.7, application date: January 30, 2014, invention name: light emitting device with temperature compensation element. technical field [0002] The invention relates to a light emitting device, especially comprising a switch element connected between a temperature compensation element and a light emitting diode group. Background technique [0003] Incandescent bulbs glow because of heat. On the contrary, the light-emitting diode (light-emitting diode, LED) light emitting mechanism is the combination of electrons and holes, so the light-emitting diode is called a cold light source. [0004] In addition, light-emitting diodes have the advantages of high durability, long life, light weight, and low power consumption. Therefore, today's lighting market has high expectations for light-emitting diodes, which are regarded as a new generation of lighting tools, which ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H05B33/08H05B44/00
Inventor 王健源谢明勋陈宗熙刘欣茂
Owner EPISTAR CORP