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SMD (surface mount device) LED (light-emitting diode) of combined type wire frame

A lead frame, combined technology, applied in the direction of semiconductor devices, electrical components, electric solid devices, etc., can solve the problems of different cold-heat shrinkage ratio, poor high temperature resistance, LED circuit disconnection, etc., to achieve flexible structure combination, To meet diverse needs, the effect of various shapes and combinations

Inactive Publication Date: 2012-07-18
李海涛
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] LEDs are widely used due to their high efficiency and energy saving. The existing LEDs mainly include the following types: high-power LEDs, in-line LEDs, dot-matrix LEDs, and SMD LEDs. The existing SMD LEDs have poor high temperature resistance. Because the injection molding plastic and the transparent filler are bonded from surface to surface, and they belong to different types of substances with different cold and heat shrinkage ratios, it has been used for a long time in the harsh outdoor environment. Injection molding plastic, transparent filler, conductive silver glue, gold solder Due to the difference in stress, the junction of the point and the metal lead frame will crack and separate, causing problems such as disconnection of the LED circuit inside the chip device and water ingress.

Method used

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  • SMD (surface mount device) LED (light-emitting diode) of combined type wire frame
  • SMD (surface mount device) LED (light-emitting diode) of combined type wire frame
  • SMD (surface mount device) LED (light-emitting diode) of combined type wire frame

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] see figure 1 and figure 2 , a patch LED with a combined lead frame, including six metal lead frames 01, a plastic cup 02, a transparent filler 03 and an LED chip 04, and six metal lead frames 01 are embedded in the plastic cup 02, the six The vertical center lines a and b of the two metal lead frames 01 are not on the same straight line, the metal lead frame 01 in the plastic cup 02 is T-shaped, and the metal lead frame 01 wrapped in the transparent filler 03 is on its vertical center line a, There are no bends and bends on b.

[0023] Six metal lead frames 01 are arranged in three rows, two metal lead frames 01 in each row. Among them, there are inherent LED chips 04 on the upper end surfaces of the three metal lead frames 01, and then the electrode points of each LED chip 04 are respectively connected to the electrode points on the upper end surfaces of the other three metal lead frames 01 through wires.

[0024] The heights of the above six metal lead frames 01 i...

Embodiment 2

[0034] see image 3 and Figure 4 , a patch LED with a combined lead frame, including two regular-shaped conjoined metal lead frames 11 and one-piece metal lead frames 12, transparent filler 3 and an elliptical light-concentrating light set on the top of the metal lead frame 12 The bowl cup 2 and three LED chips 4 placed in the spotlight bowl cup 2, the electrode points of the three LED chips 4 are respectively connected with the electrode points on other metal lead frames by wires. The transparent filler 3 directly wraps the metal lead frame 11 , the metal lead frame 12 , the spotlight bowl 2 and the LED chip 4 .

[0035] The elliptical spotlight bowl cup 2 on the metal lead frame 12 inside the SMD LED with this structure plays a role of spotlight, so that the light is more concentrated and the brightness is higher.

[0036] Similarly, the metal lead frame 11 contained in the transparent filler 3 has no bending on its vertical center line c, and the metal lead frame 12 cont...

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PUM

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Abstract

The invention discloses an SMD (surface mount device) LED (light-emitting diode) of a combined type wire frame. The SMD LED comprises bowl cups, a plurality of metal lead frames, a transparent filler and an LED wafer fixed on the metal lead frames, wherein the metal lead frames which are coated in the transparent filler are bent without curves on the vertical center lines of the metal lead frames, and the vertical center lines of the plurality of metal lead frames are not positioned on the same straight line; the bowl cups are plastic bowl cups, the plurality of metal lead frames are inlaid in the plastic bowl cups, and the transparent filler is filled in a gap between the metal lead frames and the plastic bowl cups and packages the LED wafer and wires; and the bowl cups are spotlight bowl cups and are arranged on the metal lead frames, the spotlight bowl cups are internally provided with the LED wafer, and the transparent filler directly packages the metal lead frames, the spotlight bowl cups, the wires and the LED wafer. According to the invention, the combined method of the combined type lead frame is flexible, various in shape, and firm and reliable, and an LED can display in multiple colors.

Description

technical field [0001] The invention relates to the technical field of LEDs, in particular to a patch LED of a combined lead frame. Background technique [0002] LEDs are widely used due to their high efficiency and energy saving. The existing LEDs mainly include the following types: high-power LEDs, in-line LEDs, dot-matrix LEDs, and SMD LEDs. The existing SMD LEDs have poor high temperature resistance. Because the injection molding plastic and the transparent filler are bonded from surface to surface, and they belong to different types of substances with different shrinkage ratios, they have been used for a long time in the harsh outdoor environment. Injection molding plastic, transparent filler, conductive silver glue, gold solder Due to the different stresses, the junction of the point and the metal lead frame will crack and separate, causing problems such as disconnection of the LED circuit inside the chip device and water ingress. Contents of the invention [0003] ...

Claims

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Application Information

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IPC IPC(8): H01L25/075H01L33/62H01L33/64
CPCH01L2224/48091H01L2224/48247
Inventor 李海涛
Owner 李海涛