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Optical sheet, surface light source apparatus, and transmissive display apparatus

一种光学片、面光源的技术，应用在光学片领域，能够解决牺牲聚光功能、正面方向亮度降低、降低聚光功能等问题，达到优良聚光功能、优良耐擦伤性的效果

Inactive Publication Date: 2012-08-15
DAI NIPPON PRINTING CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

That is, according to the disclosure of JP2008-70456A, by providing a protruding curved surface, the light-collecting function of the unit shape unit (prism unit) composed of a triangular cross-sectional shape is reduced, and as a result, the brightness in the front direction is lowered.
Therefore, in the optical sheet of JP2008-70456A, although the scratch resistance may be improved, the light-gathering function will be sacrificed accordingly.

Method used

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  • Optical sheet, surface light source apparatus, and transmissive display apparatus
  • Optical sheet, surface light source apparatus, and transmissive display apparatus
  • Optical sheet, surface light source apparatus, and transmissive display apparatus

Examples

Experimental program
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Embodiment

[0141] Hereinafter, although an Example demonstrates this invention in more detail, this invention is not limited to this Example.

[0142]

[0143] First, by simulation, the luminance in the front direction on the light emitting side of the optical sheet having the same structure as the above-mentioned embodiment was investigated. In the simulation, the filling rate of the optical sheet was changed, and the change of the luminance in the front direction accompanying the change of the filling rate was investigated.

[0144] The optical sheet as the simulation object has: a main body, at least three first unit shape units that are arranged on one surface of the main body and constitute a fly-eye lens, and are arranged on one surface of the main body, each of which is connected to the main body. A plurality of second unit shape units extending in parallel in one direction on one surface. The height of the first unit shape unit from one plane is higher than the height of the s...

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Abstract

Disclosed is an optical sheet having both excellent light collecting function and excellent abrasion resistance. The optical sheet (40) is provided with: a sheet-like main body (45); three or more first unit-shaped elements (50) which are provided on one surface (46) of the main body; and a plurality of second unit-shaped elements (55) disposed on the main body surface. Each of the second unit-shaped elements extends parallel to one direction on the sheet surface of the main body. The height (H1) of the first unit-shaped element from the main body surface is more than the height (H2) of the second unit-shaped element from the main body surface. When the optical sheet is observed from the normal line direction (nd) to the main body surface, the ratio of the region occupied by the first unit-shaped elements on the main body surface is 10.0% or less.

Description

technical field [0001] The present invention relates to an optical sheet having excellent light-condensing function and excellent scratch resistance. In addition, the present invention relates to a surface light source device and a transmissive display device having such an optical sheet. Background technique [0002] A surface light source device used in a transmissive display device has a light source, and a plurality of optical sheets (optical films) for changing the traveling direction of light from the light source. For example, as in JP2008-70456A figure 1 As disclosed, in many cases, a plurality of optical sheets include: a light diffusion sheet that diffuses light from a light source and hides (makes it inconspicuous) an image of the light source; A concentrating sheet with a function of converging directions and increasing brightness in the front direction (spotting function). [0003] Among them, an optical sheet obtained by arranging linearly extending unit sha...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B5/02F21S2/00F21V5/02G02B3/00G02F1/1335F21Y101/02F21Y103/00F21Y101/00
CPCG02B3/0031G02B3/005G02B5/045G02F1/133606G02F1/133607
Inventor 牛山章伸富田晶子后石原聪小岛弘岛田贵之浜岛光宏松藤和夫田中和树
Owner DAI NIPPON PRINTING CO LTD
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