Prism sheet, and backlight unit and liquid crystal display device using prism sheet

A liquid crystal display device and prism sheet technology, applied in prisms, optical elements, lighting devices, etc., can solve the problems that the light diffusion layer cannot be found and has not been disclosed, and achieves suppression of moiré fringes, reduction of light loss, and high brightness Effect
CN101796437AInactive Publication Date: 2010-08-04DIC CORP
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
DIC CORP
Publication Date
2010-08-04
Estimated Expiration
Not applicable · inactive patent

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Abstract

Provided is a prism sheet which has high effects of suppressing moire fringes, high front brightness and reduced number of components when it is used as a prism sheet for a backlight unit for a liquid crystal display device. The prism sheet has a prism row having ridges formed parallel to each other at equivalent intervals on one surface and a light diffusion layer containing porous particles on the other surface. The prism sheet preferably has the prism row on one surface and the light diffusion layer on the other surface by having a light transmitting sheet in between.
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Description

technical field

[0001] The present invention relates to a prism sheet usable as a component of a backlight unit of a liquid crystal display device (LCD) or the like. Background technique

[0002] In a liquid crystal display device equipped in a computer, a mobile phone, a digital camera, etc., a backlight unit is incorporated as a device for illuminating the liquid crystal display surface from the back side. figure 1 An example of a general configuration of a liquid crystal display device is shown. In the conventional backlight unit 2, light emitted from a light source 3 such as a cold cathode fluorescent lamp (CCFL) or a light emitting diode (LED) is reflected by a reflection sheet 6 or the like, and the light is made incident on a light guide plate 5, so that The light emitted from the upper surface of the light guide plate 5 is converged in the front direction by the light diffusion film (lower diffusion film) 7 . The outgoing light from the light diffusion film (lower ...

Claims

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