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Light diffusion structure and light diffusion sheet

A technology of light diffusion and cylindrical microlens, which is applied in optics, optical components, instruments, etc., can solve problems such as uneven display brightness and uneven light diffusion, achieve good display brightness uniformity, improve uniformity, and increase display brightness The effect of the uniform effect

Inactive Publication Date: 2021-01-08
CHENGDU FSCREEN SCI TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] In view of this, the object of the present invention is to provide a light diffusion structure to solve the problem of uneven display brightness caused by uneven light diffusion caused by uneven light intensity distribution of the light source in the existing light diffusion structure

Method used

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  • Light diffusion structure and light diffusion sheet
  • Light diffusion structure and light diffusion sheet
  • Light diffusion structure and light diffusion sheet

Examples

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Embodiment 1

[0040]Referencefigure 2 The schematic diagram of the light diffusion structure according to the embodiment of the present invention is shown. A light diffusion structure includes a plurality of columnar microlenses 101 arranged horizontally. The height of the marking columnar microlenses 101 is T, and the width of the columnar microlenses 101 is P. Then the aspect ratio of the cylindrical microlens is the height of the cylindrical microlens 101 / the width of the cylindrical microlens 101, that is, the aspect ratio of the cylindrical microlens=T / P, and the cylindrical microlens is from side to side along the vertical direction of the light diffusion structure. The aspect ratio of the lens gradually decreases. By setting the columnar microlens along the vertical direction of the light diffusion structure to gradually reduce the aspect ratio, the diffusion ability of the light diffusion structure can be effectively reduced, that is, the light scattering angle of the light diffusion stru...

Embodiment 2

[0064]Such asFigure 13Shown is a schematic diagram of a light diffusion sheet including a light diffusion structure. The light diffusion sheet includes a substrate 105 and a light diffusion structure 10 according to the first embodiment of the present invention fabricated on the substrate, and the light diffusion structure 10 includes various cylindrical microlenses according to the embodiment of the present invention.

[0065]As an alternative, the substrate 105 includes but is not limited to polyethylene, high polymer polypropylene, polystyrene, polyvinyl chloride, polycarbonate, polyethylene terephthalate, polyamide, polyurethane, Flexible plastic or rubber materials such as polymethyl methacrylate, polycarbonate, and thermoplastic polyurethane elastomer, or transparent substrates with certain rigidity such as glass, acrylic, and ceramics.

[0066]The light diffusion sheet including the light diffusion structure of the first embodiment can distribute the light intensity closer to the l...

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Abstract

The invention provides a light diffusion structure and a light diffusion sheet, and relates to an optical element. The light diffusion structure comprises a plurality of cylindrical micro lenses whichare transversely arranged, the height-width ratio of the cylindrical micro lenses is gradually reduced from one side to the other side in the vertical direction of the light diffusion structure, andthe height-width ratio of the cylindrical micro lenses is equal to the height / width of the cylindrical micro lenses. The light diffusion sheet comprises a base material and the light diffusion structure manufactured on the base material. According to the light diffusion structure, more light intensity close to the light source position is distributed to the position away from the light source, thebrightness close to the light source position is reduced, the brightness far away from the light source position is increased, the brightness close to the light source position is close to or the same as the brightness far away from the light source position, the display brightness uniformity of the light diffusion structure is greatly improved, and the display brightness uniformity effect of theformed light diffusion sheet is further improved.

Description

Technical field[0001]The invention relates to an optical element, in particular to a light diffusion structure and a light diffusion sheet.Background technique[0002]The current light diffusion structure is mainly used in the fields of projection display, naked eye 3D and lighting. For example, in the field of projection display, the key components of the projection screen, which is one of the core components of the projection display, are arranged vertically and connected in the projection screen. The cylindrical lens of the same size to diffuse the light of the projector.[0003]The domestic patent application publication number CN107102508A discloses a cylindrical lens of the same size to enlarge the viewing angle of the projection screen, such asfigure 1 As shown, using the same principle that the horizontal diffusion ability of vertically connected cylindrical lenses of the same size at each position on the projection screen is the same, the light intensity in the horizontal direc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B5/02
CPCG02B5/0215G02B5/0242G02B5/0278
Inventor 王起飞张益民胡强
Owner CHENGDU FSCREEN SCI TECH
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