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Optics and Lighting Covers

A technology of lighting cover and lighting equipment, applied in the field of lighting cover, can solve the problem of difficult to identify the light source as a point light source and the like

Active Publication Date: 2020-03-13
PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] Moreover, because the directivity of the LED light source is strong, it is also necessary to make the lighting cover have light diffusion, so that it is difficult to identify the light source of the LED lighting as a point light source.

Method used

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  • Optics and Lighting Covers
  • Optics and Lighting Covers
  • Optics and Lighting Covers

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0074] A transparent acrylic extruded sheet (SUMIPEX E000) was used as a transparent resin base material, and one surface of the transparent acrylic extruded sheet was subjected to texture processing by sandblasting (gravity suction type, alumina beads). Ra1 at this time was 2.5 μm. Then, on the surface opposite to the textured surface, a paint prepared by the following method was applied to have a film thickness of 8 μm.

[0075]80 parts by weight of light-diffusing particles were added to 100 parts by weight of the solid content of the acrylic resin. Then, it was diluted with cyclohexanone so that the whole non-volatile content was 20%, and stirred at 2000 rpm for 20 minutes with a disperser to form a coating material. In addition, as the acrylic resin, WAL-578 (manufactured by DIC Corporation, solid content: 50% by mass, refractive index: 1.49) was used. In addition, as light-diffusing particles, Epostar MS (benzoguanamine formaldehyde condensate, manufactured by Nippon S...

Embodiment 2

[0077] A transparent acrylic extruded sheet (SUMIPEX E000) was used as a transparent resin base material, and one surface of the transparent acrylic extruded sheet was subjected to texture processing by sandblasting (gravity suction type, alumina beads). Ra1 at this time was 4.3 μm. Then, on the surface opposite to the textured surface, a paint prepared by the following method was applied to a film thickness of 10 μm.

[0078] 100 parts by weight of light-diffusing particles were added to 100 parts by weight of the solid content of the acrylic resin. Then, it was diluted with cyclohexanone so that the whole non-volatile content was 20%, and stirred at 2000 rpm for 20 minutes with a disperser to form a coating material. In addition, as the acrylic resin, WAL-578 (manufactured by DIC Corporation, solid content: 50% by mass, refractive index: 1.49) was used. In addition, as light-diffusing particles, Epostar M05 (benzoguanamine formaldehyde condensate, manufactured by Nippon Sh...

Embodiment 3

[0080] A transparent acrylic extruded sheet (SUMIPEX E000) was used as a transparent resin base material, and one surface of the transparent acrylic extruded sheet was subjected to texture processing by sandblasting (gravity suction type, alumina beads). Ra1 at this time was 6.2 μm. Then, on the surface opposite to the textured surface, a paint prepared by the following method was applied to a film thickness of 10 μm.

[0081] 120 parts by weight of light-diffusing particles were added to 100 parts by weight of the solid content of the acrylic resin. Then, it was diluted with cyclohexanone so that the whole non-volatile content was 20%, and stirred at 2000 rpm for 20 minutes with a disperser to form a coating material. In addition, as the acrylic resin, WAL-578 (manufactured by DIC Corporation, solid content: 50% by mass, refractive index: 1.49) was used. In addition, as light-diffusing particles, Epostar M05 (benzoguanamine formaldehyde condensate, manufactured by Nippon Sh...

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Abstract

The optical component (60) includes: a transparent resin substrate (61) having a textured surface (61a) subjected to texture processing, and a surface ( 61c) formed on the light diffusion layer (62). The optical member (60) is used such that the light diffusion layer (62) is disposed on the light source unit (40) side. In addition, the arithmetic mean roughness (Ra1) of the textured surface (61a) of the transparent resin substrate (61) is not less than 1 μm and not more than 7 μm, and the arithmetic mean roughness (Ra2) of the light diffusion layer (62) is not less than 1 μm and not more than 7 μm. Hereafter, the thickness of the light-diffusion layer (62) is 5 micrometers or more and 15 micrometers or less. And the difference in refractive index between the light-diffusion particle (62b) contained in the light-diffusion layer (62) and acrylic resin (62a) is 0.1-0.2.

Description

technical field [0001] The present invention relates to an optical component having both high light transmittance and high light diffusibility, and a lighting cover formed using the optical component. Background technique [0002] A lighting device generally has a lighting cover that covers a light source unit. Usually, this lighting cover is formed using the optical member which has translucency and light diffusibility. In particular, by forming a lighting cover using an optical member having light diffusing properties, a lighting cover having light diffusing properties can be obtained. [0003] By using such a light-diffusing lighting cover, the light irradiated from the light source can be diffused over the entire light-transmitting surface of the lighting cover. As a result, the amount of light transmitted per unit area of ​​the entire light-transmitting surface can be averaged, and occurrence of unevenness in light and shade on the light-transmitting surface can be su...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G02B5/02B32B3/30B32B7/023F21V3/00F21V3/04
CPCB32B3/30F21V3/00F21V3/04G02B5/02
Inventor 内山修平山科大悟山内哲
Owner PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO LTD