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Long-persistence light-emittng diode

A technology of long afterglow light emission and light emitting diode, which is applied in the direction of light-emitting materials, electrical components, electric solid-state devices, etc., can solve the problem of unsustainable light emission, etc., and achieve the effect of long life and cost saving.

Inactive Publication Date: 2004-10-13
SOLIDLITE CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although it can change the LED crystal grains to finally emit white light, it still cannot continue to emit light after the power is removed, and can only produce monotone white light with two colors (blue and yellow)

Method used

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  • Long-persistence light-emittng diode

Examples

Experimental program
Comparison scheme
Effect test

example 1

[0034] Please refer to FIG. 2 which is a lamp-type (Lamp) long afterglow light-emitting diode of the present invention. First, the short-wavelength LED crystal grain 12 is fixed on the packaging bracket 30, and the short-wavelength LED crystal grain 12 is connected with the bracket electrode 31 and the wire 5 respectively. Encapsulate the bracket 30, put on the long-lasting fluorescent material 3, and finally shape the transparent resin 2 through glue filling, and use the short wavelength generated by the short-wavelength LED crystal grain 12 to excite the long-lasting fluorescent material 3 on the surface to produce long-lasting Effect.

[0035] The lamp-type long-afterglow light-emitting diode produced in this way is suitable for relatively large lamps such as traffic signals and emergency lighting.

example 2

[0037] Please refer to FIG. 3 , which is a surface mount type (SMD) long-lasting light-emitting diode of the present invention. The blue-violet LED crystal grains 13 with a wavelength range of 400 and 450 nm are fixed on the base electrode 41, and the blue-violet LEDs are respectively connected with wires 5. The crystal grain 13, the base electrode 41 and the electrode 42 are finally glued or molded with the long-lasting fluorescent material 3, and the blue-violet light generated by the blue-violet LED crystal grain 13 is used to excite the long-lasting fluorescent material 3 with the blue-violet light. It emits fluorescent synthetic mixed light, which is different from the fluorescent light emitted by the remaining long-lasting fluorescent material 3 after the blue-violet LED crystal grain 13 is extinguished.

[0038] The surface-mounted long-lasting light-emitting diode of this method uses only a single LED chip in a small-volume package, which can produce two-color mixed lig...

example 3

[0040] Please refer to FIG. 4 which shows the surface-mounted unidirectional long-lasting light-emitting diode of the present invention. Firstly, red, green and blue long-lasting fluorescent materials 3 are properly proportioned to emit white light, and then short-wavelength LEDs of 250-400nm The die 12 is fixed on the base electrode 41 of the packaging base 40, and the short-wavelength LED die 12, the base electrode 41 and the electrode 42 are respectively connected with the wire 5, and finally the mixed long-lasting fluorescent material 3 is dispensed with glue It is completed on the short-wavelength LED crystal grain 12, and the short-wavelength generated by the short-wavelength LED crystal grain 12 is used to excite the long-lasting fluorescent material 3 on its surface to generate long-lasting white light.

[0041] The surface-mounted long-lasting light-emitting diode produced by this method is suitable for use in various liquid crystal display screens and white light illu...

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Abstract

The invention provides a kind of long afterglow luminescent diode, which is made up of long afterglow luminescent diode crystal particle and added long afterglow luminescent material. It uses short wavelength luminescent diode crystal particles with wavelength of 250 and 450 nm, it only need several minutes to exposing the long afterglow fluorescence material, it can make the long afterglow material to emit out fluorescence for several hours. The character lies in: the electricity conducting time is short, the luminescent time is long, power saving, and the lifespan is increased, easy to be produced, it can be adjusted into any color or double-color. The invention can be used in long time instructing light house, especially applies to the keys and liquid crystal displaying background light of mobile phone, path instruction and light, and traffic signs.

Description

technical field [0001] Traditional light-emitting diode (LED) packaging is to fix the LED chip (Chip) on the substrate or metal bracket and then wire it, and then encapsulate it with transparent resin. LEDs are divided into lamp type (Lamp LED) and surface mount type ( SMD LED) two kinds. The invention adds long afterglow fluorescent material on the LED crystal grain and encapsulates and molds it. Background technique [0002] When the existing LED is to be continuously illuminated, an external power supply must be provided. As long as it is on, the power supply needs to be continuously supplied. A power outage is life-threatening. [0003] In order to keep the LED glowing, it is necessary to provide power. Generally, it is an external battery, capacitor or rechargeable battery. No matter what the method is, it will increase the use of space, and the life of the battery and rechargeable battery is limited, and the power of the rechargeable battery will be less and less. Th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K11/08H01L33/50
CPCH01L2224/48091H01L2224/48247H01L2224/48257H01L2924/181
Inventor 陈兴
Owner SOLIDLITE CORP
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