Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Light emitting diode temperature alarm based on phase change material

A technology of temperature alarms and light-emitting diodes, which is applied in the direction of physical/chemical changes in thermometers, thermometers, and parts of thermometers, etc., to achieve the effect of simple structure and low cost

Active Publication Date: 2017-05-31
GUANGDONG UNIV OF TECH
View PDF7 Cites 1 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The application of the performance of phase change materials in the overheat protection and temperature alarm of light-emitting diodes has not been reported yet.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Light emitting diode temperature alarm based on phase change material
  • Light emitting diode temperature alarm based on phase change material
  • Light emitting diode temperature alarm based on phase change material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0023] Embodiments of the present invention will be described below in conjunction with the accompanying drawings.

[0024] 1. If Figure 1-3 As shown in the figure, when soldering gold wire balls, one of the electrodes is first welded to the pin of the bracket, the gold wire is pulled for a certain distance and cut off, and the cut end of the gold wire is manually fired once to burn the ball, and the fired gold ball is moved to the chip On the solder joint, the other pole is welded normally.

[0025] 2. Using paraffin as a phase change material, such as Figure 4-6 , using a fixed fixture to fix the movable gold wire, the paraffin is heated into a liquid, and then drops into the chip through a mold with holes at a slow speed, and finally forms a hemispherical solid. Install the mold strips and drip epoxy resin, let it stand for two hours, then demould, and let it stand for another 24 hours.

[0026] 3. When the LED is working normally, the temperature of the chip rises to a...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention relates to a light emitting diode temperature alarm based on a phase change material. During the packaging process of a traditional light emitting diode, a phase change material is used as a part of packaging, and epoxy resin or silica gel is used as the sealant, the packaging structure of the phase change material directly contacted with the LED chip is acquired; the heating of the LED chip or the temperature rise of the external environment can make a part of phase change material reach the melting point and generate the phase change; the thermal stress generated by sharp expansion in phase change can cause the offset of the connection line between the chip and the packaging structure and further lead to the LED breakage, thereby reaching the alarm effect of current disconnection and lighting stoppage at a certain temperature. The decline of chip temperature after the LED disconnection or the decline of the external environment temperature can make that the connection line between the chip and the packaging structure is re-contacted with an upper electrode of the chip, the LED is conducted, and thus the alarm is automatically eliminated. The alarm is low in cost, simple in structure, and can realize the exact alarm of the LED chip or the external environment at one temperature point or temperature section.

Description

technical field [0001] The invention relates to the technical field of light-emitting diodes and alarms, in particular to a light-emitting diode temperature alarm based on phase-change materials. Background technique [0002] At present, the application of LEDs is becoming more and more extensive, and LED lamps for daily indoor and outdoor lighting are also becoming more and more popular. The current LED lighting is more and more developing towards high power, and the high heat brought by high-power LEDs is an important factor that plagues the popularization of LEDs. If the LED works at high temperature for a long time, its lifespan will be greatly shortened, resulting in dead lights, resulting in scrapped lamps. If an alarm signal can be automatically sent out when the temperature is overheated to remind maintenance personnel to take corresponding maintenance operations or to cut off the power in time to prevent overheating, the service life of the LED module can be extend...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
IPC IPC(8): G01K11/06G01K1/02H01L33/56
CPCH01L33/56G01K1/02G01K11/06H01L2224/8592H01L2224/48465
Inventor 招瑜梁涛恩张宏俊苏子豪周磊李京波杨亿斌肖也王培星
Owner GUANGDONG UNIV OF TECH
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com