Light emitting diode capable of achieving light mixing

A technology of light-emitting diodes and light mixing, which is applied in semiconductor devices, electrical components, circuits, etc., can solve the problems of uneven light mixing and insufficient light mixing, and achieve good uniformity

Inactive Publication Date: 2015-06-17
青岛威力电子科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is that since the LED grains of three colors cannot be arranged at the center of the LED at the same time, the light of different colors emitted by each LED grain cannot be fully mixed, and there is uneven light mixing. Shortcomings

Method used

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  • Light emitting diode capable of achieving light mixing
  • Light emitting diode capable of achieving light mixing
  • Light emitting diode capable of achieving light mixing

Examples

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Embodiment 1

[0018] Such as figure 1 As shown, the substrate 11 is used to carry the light mixing device 12 and the LED die 13 . A circuit layer 110 is disposed on the substrate 11 . The substrate 11 can be a glass fiber board (FR4), a metal core printed circuit board (Metal Core PCB, MCPCB), a ceramic substrate (Ceramic Substrate), a silicon substrate (Silicon Substrate), a ceramic aluminum substrate (Ceramic Aluminum Substrate).

[0019] The light mixing device 12 is disposed around the LED die 13 . The light mixing device 12 is made of light-transmitting material, such as glass (Glass), polycarbonate (Polycarbonate, PC), polymethylmethacrylate (Polymethylmethacrylate, PSa), silicone resin (Silicone) or epoxy resin ( Epoxy Resin) and so on. The inside of the light mixing device 12 is doped with scattering particles 122, the refractive index of the scattering particles 122 is between 1.1 and 2.4, and its material can be titanium dioxide (TiO2), fused quartz (Fused Silica), polycarbonat...

Embodiment 2

[0023] Such as figure 2 As shown, the second embodiment of the present invention also provides a light emitting diode 20, which includes a substrate 21, a light mixing device 22, a plurality of light emitting diode chips 23 and a package 24, the light emitting diode 20 and the above light emitting diode 10 are generally the same in structure, the difference is that the substrate 21 is provided with a plurality of substrate sub-substrates 26, and the plurality of light-emitting diode dies 23 are bonded to the substrate through metal bumps 25 by means of flip-chip (Flip Chip). The bottom sub-substrate 26 is electrically connected to the circuit layer 210 on the substrate 21 through metal wires (not shown).

[0024] It should be noted that the inner walls of the above-mentioned light mixing devices 12 and 22 facing the LED die 13 are not limited to be stepped surfaces, and may also be geometric surfaces of other shapes. see image 3 and Figure 4 , the embodiment of the prese...

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PUM

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Abstract

The invention discloses a light emitting diode capable of achieving light mixing. The light emitting diode comprises a substrate, a plurality of light emitting diode crystalline grains and a packaging body. The light emitting diode crystalline grains are arranged on the substrate through flip chip packaging. The light emitting diode further comprises a light mixing device on the substrate, and the light mixing device surrounds the light emitting diode crystalline grains. The packaging body is arranged on the substrate and wraps the light mixing device and the light emitting diode crystalline grains, the light mixing device is made of light-pervious material epoxy resin, scattering particles are doped in the light mixing device, and the refractive index of the scattering particles ranges from 1.1 to 2.4. The light emitting diode has the advantage of being uniform in light mixing.

Description

technical field [0001] The invention relates to a light-emitting diode, in particular to a light-emitting diode which uses a plurality of light-emitting diode grains with different light-emitting wavelengths for light mixing. Background technique [0002] Light-emitting diodes (LEDs, Light Emitting Diodes) made of semiconductor light-emitting elements have the advantages of high brightness, low operating voltage, low power consumption, easy matching with integrated circuits, simple driving, and long life, so they can be widely used as light sources. For the lighting field, please refer to Thermal Considerations for LED Components in an Automotive Lamp^^ article by Joseph Bielecki et al. in the 23rd IEEE SEMI-THERMSymposium. [0003] In order to meet different lighting requirements in various environments, a light mixing mechanism is usually used to obtain light of a predetermined color. For example, the mechanism of common light-emitting diodes to produce white light genera...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01L25/075H01L33/48H01L33/58
CPCH01L2224/16145H01L2224/48091H01L2924/00014
Inventor 不公告发明人
Owner 青岛威力电子科技有限公司
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