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White light LED device with ultrahigh color rendering index

A technology of LED devices and color rendering index, which is applied to semiconductor devices, electrical components, circuits, etc., and can solve the problem that the color rendering index of white LEDs is difficult to improve

Inactive Publication Date: 2020-05-12
EZHOU INST OF IND TECH HUAZHONG UNIV OF SCI & TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide an ultra-high color rendering index white LED device to solve the problem that the color rendering index of white LEDs in the prior art is difficult to improve

Method used

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  • White light LED device with ultrahigh color rendering index
  • White light LED device with ultrahigh color rendering index
  • White light LED device with ultrahigh color rendering index

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Embodiment 1

[0028] refer to figure 1 , a white LED device with an ultra-high color rendering index disclosed in this embodiment sequentially includes a hexagonal copper substrate 1 , a ceramic substrate 2 , a dam 3 and a chip 4 inside the dam 3 . The dam 3 is located on the upper surface of the ceramic substrate 2 and forms a bracket with the ceramic substrate 2 . The dam 3 is in the shape of a ring with an opening at the top, and the opening is stepped. The dam 3 is filled with fluorescent glue 5 covering the chip 4 , and the upper surface of the fluorescent glue 5 is flush with the upper surface of the dam 3 .

[0029] Wherein, the chip 4 is welded on the upper surface of the ceramic substrate 2 in the dam 3 by eutectic welding, and the chip 4 is a blue LED flip chip 4 . The bracket with the chip 4 soldered is then bonded to the upper surface of the hexagonal copper substrate 1 by solder paste at 150° C. to form a thermal path or an electrical path with the hexagonal copper substrate 1...

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Abstract

The invention provides a white light LED device with an ultrahigh color rendering index, and relates to the technical field of light emitting diodes. The device comprises a ceramic substrate, a box dam with an opening in the top is fixed to the edge of the upper end face of the ceramic substrate, a chip is welded in the box dam on the upper end surface of the ceramic substrate, fluorescent glue covering the chip is filled in the box dam, the fluorescent glue comprises green fluorescent powder with the mass of x, red fluorescent powder with the mass of y and silica gel with the mass of z, x / y is greater than or equal to 12.5 and less than or equal to 20.9, and z / (x+y) is greater than or equal to 1.9 and less than or equal to 3.125. By proportioning the green fluorescent powder and the red fluorescent powder in the range and proportioning the mixture of the green fluorescent powder and the red fluorescent powder with the silica gel, the color rendering index of the white LED can easily exceed 90, and the R9 can reach 98.89 under the condition that the ratio of the green fluorescent powder to the red fluorescent powder is 0.15 / 0.010.

Description

technical field [0001] The invention relates to the technical field of light-emitting diodes, in particular to an ultra-high color rendering index white LED device. Background technique [0002] Light-Emitting Diode (LED) is a semiconductor light-emitting device based on the principle of P-N junction electroluminescence. It has high brightness, low power consumption, long life, fast startup, low power, no flicker, and is not easy to produce visual The advantages such as visual fatigue have been widely used in the field of lighting and backlight display, such as indoor lighting, car headlights, landscape lighting, video screens and plant lighting and other fields. At present, the most important way to realize white LED is phosphor conversion LED. The most mainstream technology in the market is the blue light InGaN chip to excite the yellow YAG (Y 3 Al 5 o 12 ) phosphors produce white light, that is, blue light excites yellow phosphors to emit yellow light, and yellow ligh...

Claims

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Application Information

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IPC IPC(8): H01L33/50H01L33/56
CPCH01L33/504H01L33/505H01L33/501H01L33/56H01L2933/0033H01L2933/0041
Inventor 王安格彭洋王昊张毅郑志华戴江南陈长清
Owner EZHOU INST OF IND TECH HUAZHONG UNIV OF SCI & TECH