White light LED with uniform color temperature and high color rendering performance
A high color rendering, LED chip technology, applied in the direction of electrical components, electrical solid devices, circuits, etc., can solve problems such as non-conformity with lighting standards, unevenness of color temperature space angle, and bluish central light emission of LEDs, etc., to eliminate lateral Yellowish luminous effect, good consistency, uniform angle effect
Inactive Publication Date: 2011-10-26
FUDAN UNIV
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These two reasons cause the center of the LED light to be bluish, the sides to be yellowish, and the color temperature has unevenness in space angles, and some even have a difference of 750K between the center color temperature and the side color temperature, which does not meet the lighting standards.
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[0023] Below in conjunction with accompanying drawing and embodiment, further illustrate the present invention.
[0024] The specific implementation steps are as follows:
[0025] 1. Preparation of fluorescent sheet 7:
[0026] (1) Prepare a spherical groove mold 11 by mechanical processing, the shape and size of the groove are as follows figure 1 shown.
[0027] (2) Prepare the spherical convex groove mold 13 by mechanical processing, the shape and size of the convex groove are as follows: figure 2 shown.
[0028] (3) Prepare glue A and B according to the mass ratio of components A and B at 1:1, add yellow phosphor to AB glue, phosphor and AB glue at 0.08—0.12 g / cm 3 Proportional preparation, stirring, uniform dispersion, and preparation of fluorescent glue.
[0029] (4) Drop the fluorescent glue prepared in step 3 into figure 1 In the shown spherical groove mold 11, forming figure 2 Fluorescent glue 12 shown.
[0030] (5), such as figure 2 As shown, the spheri...
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The invention, which belongs to the LED technical field, more particular relates to white light LED with uniform color temperature and high color rendering performance. The white light LED provided in the invention comprises the basic components, which are also included in a common white light LED. The basic components are as follows: a LED chip, a packaging support, a silica gel, a fluorescence sheet, a lens, a reflection cup and a heat sink. The fluorescence sheet is in a shape of a spherical crown, wherein the center of the sheet is thick and the edge of the sheet is thin. The fluorescence sheet is above the LED chip as well as the fluorescence sheet and the LED chip are separated from each other, wherein the space between the fluorescence sheet and the LED chip is filled with the transparent silica gel. The fluorescence sheet absorbs photon emitted by the LED chip; after the conversion at energies, the photon is converted into photon with a longer wave length; the converted photon is combined with transmitted light that is emitted by the LED chip and permeates through the fluorescence sheet so as to generate white light. The white LED provided in the invention has an exquisite design. According to the invention, a yellow effect of light of each side of an ordinary white light LED can be eliminated, and thus a color temperature of each angle of space is even with good uniformity. Therefore, according to the invention, white light LED with high performance and low cost can be manufactured.
Description
technical field [0001] The invention belongs to the technical field of LEDs, and in particular relates to a white light LED without fluorescent powder and high color rendering performance. Background technique [0002] Since Japanese scientist Shuji Nakamura invented commercial nitride blue light-emitting diodes (LEDs) in 1993, the research and application of nitride LEDs have expanded explosively. Nitride blue light-emitting diodes have huge applications in many fields, the most important of which are RGB three-color display and high-power white LED semiconductor lighting. Semiconductor solid-state lighting based on high-power white LED technology has high electro-optical conversion efficiency, long life, safety, and environmental protection, and is favored by governments all over the world. In addition, because LED is an electric light source and small in size, it will provide great lighting design. Great freedom. At present, the methods of realizing high-power white lig...
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IPC IPC(8): H01L33/50H01L33/48H01L33/00
CPCH01L2224/48091H01L2224/48247H01L2224/49107H01L2924/00014
Inventor 崔旭高黄高山梅永丰徐光明严华锋陈宇
Owner FUDAN UNIV
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