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Manufacturing method for light diffusion sheet for improving color rendering of white LED lamp

A technology of LED lamps and light diffusers, which is applied to semiconductor devices of light-emitting elements, light sources, point light sources, etc., can solve problems such as waste, dazzling illumination angle, color distortion, etc. Color ability, improve uniformity effect

Inactive Publication Date: 2014-10-01
黄晖辉 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the discontinuous emission spectrum of this white LED chip, especially the lack of red light components, it is difficult to achieve a color rendering index of more than 80.
For example, when the light emitted by a white LED is irradiated on a red substance, a faint orange color will appear, resulting in color distortion and affecting its application in the field of lighting
In addition, because LED is a point light source, there are problems such as glare and limited illumination angle, so an additional optical diffuser is required to change it from point light to surface light to meet the lighting requirements
At present, most white LED lamps on the market are assembled by low color rendering index LED chips and light diffusion sheets. To achieve high color rendering index white lighting, it is necessary to replace expensive high color rendering index LED chips and discard the original Low color rendering index LED chip, thus causing waste

Method used

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  • Manufacturing method for light diffusion sheet for improving color rendering of white LED lamp
  • Manufacturing method for light diffusion sheet for improving color rendering of white LED lamp
  • Manufacturing method for light diffusion sheet for improving color rendering of white LED lamp

Examples

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Effect test

Embodiment 1

[0025] A method for manufacturing a light diffusion plate for improving the color rendering index of ordinary white LED lamps, comprising the following steps:

[0026] (1) Mix silica gel solution, nano barium sulfate and nitride red phosphor (chemical formula: Ba 2 Si 5 N 8 : Eu) mixed. Wherein, the weight percentage of the silica gel solution is 75-94%, the weight percentage of the nanometer barium sulfate is 1-5%, and the weight percentage of the nitride red fluorescent powder is 5-20%.

[0027] (2) Use screen printing to print the above-mentioned mixed material onto one side of the acrylic light diffusion plate substrate to obtain a spectrum adjustment layer. The schematic diagram of the side view structure is shown in figure 1 .

[0028] (3) Irradiate the prepared spectrum adjustment layer with ultraviolet light to make it solidify, so as to obtain the product.

[0029] (4) Test: The luminescence spectrum of the white LED chip is as follows: image 3 As shown, its co...

Embodiment 2

[0031] A method for manufacturing a light diffusion plate for improving the color rendering index of ordinary white LED lamps, comprising the following steps:

[0032] (1) Mix silica gel solution, nano barium sulfate and nitride red phosphor (chemical formula: Ba 2 Si 5 N 8 : Eu) mixed. Wherein, the weight percentage of the silica gel solution is 75-94%, the weight percentage of the nanometer barium sulfate is 1-5%, and the weight percentage of the nitride red fluorescent powder is 5-20%.

[0033] (2) Print the above mixed material onto one side of the acrylic light diffusion plate substrate with a screen printing machine to obtain a spectrum adjustment layer.

[0034] (3) Irradiating the prepared spectrum adjustment layer with ultraviolet light to make it cured.

[0035] (4) Use a screen printing machine to print the spectrum adjustment layer on the other side of the above-mentioned light diffusion plate substrate. The schematic diagram of its side view structure is shown...

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Abstract

The invention discloses a manufacturing method for a light diffusion sheet for improving color rendering of a white LED lamp. The light diffusion sheet at least comprises a spectrum regulating layer and a light diffusion sheet substrate. The spectrum regulating layer can coat the light diffusion sheet substrate through a silk screen printing method and is irradiated to cure through an ultraviolet lamp. The light diffusion sheet is capable of improving the red light component in the light emitting spectrum of the white LED lamp so as to improve the color rendering of the white LED lamp.

Description

technical field [0001] The invention belongs to the field of light-diffusing sheets, and in particular relates to a method for making a light-diffusing sheet that improves the color rendering of white LED lamps. Background technique [0002] At present, white LED has become the mainstream energy-saving lighting technology. White light LEDs are usually composed of a gallium nitride blue chip and a yellow phosphor (YAG: Ce) coated on the blue chip that can be excited by blue light. The white light emitted is a mixture of blue light and yellow light. However, due to the discontinuous emission spectrum of this white LED chip, especially the lack of red light components, it is difficult for its color rendering index to reach more than 80. For example, when the light emitted by a white LED is irradiated on a red substance, a faint orange color will appear, resulting in color distortion and affecting its application in the field of lighting. In addition, since LED is a point ligh...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F21V5/08F21Y101/02F21Y115/10
Inventor 黄晖辉李远
Owner 黄晖辉
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