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Surface illuminating device and image display apparatus

A surface-emitting, flat technology, applied in lighting devices, lighting device parts, optics, etc., can solve the problem of insufficient brightness of edge-lit backlight devices

Inactive Publication Date: 2010-02-24
SONY CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, with the recent increase in size of image display devices used in television systems and the like, the brightness of edge-illuminated backlight devices is insufficient.

Method used

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  • Surface illuminating device and image display apparatus
  • Surface illuminating device and image display apparatus
  • Surface illuminating device and image display apparatus

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0081] Hereinafter, preferred embodiments for realizing a surface light-emitting device and an image display device will be described with reference to the accompanying drawings.

[0082] In the preferred embodiments given below, the surface light-emitting device is applied to a backlight device of an image display device. It is to be noted that the application of the surface light emitting device is not limited to the backlight device of the image display device, and the surface light emitting device can be applied to various devices for emitting light provided in the image display device.

[0083] The surface light emitting device 10 is used as a direct backlight type backlight device for an image display device 50 (see figure 1 and figure 2 ).

[0084] The surface light-emitting device 10 has components arranged in a housing 11 . The surface emitting device 10 includes a plurality of line light sources 12 , a reflector 13 , an optical sheet 14 , a diffuser 15 and a plu...

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PUM

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Abstract

A surface illuminating device is provided and includes a plurality of linear light sources, a light-transmissive optical sheet including a luminance-distribution control layer for decreasing unevenness in luminance of light emitted from the linear light sources, and a reflection surface for reflecting the light emitted from the linear light sources. The luminance-distribution control layer includes a plurality of protrusions. In a range of 0!<=x!<=L / 2, protruding directions of some or all the protrusions are inclined such that the protruding directions of the protrusions are located farther from a Z direction, which is an optical axis of a linear light source in an X direction, to the X direction as the protrusions are located farther from the position of x=0 in the X direction, where theX direction represents the arrangement direction of the linear light sources.

Description

[0001] References to related applications [0002] The present invention contains subject matter related to Japanese Priority Patent Application JP 2008-214600 filed in the Japan Patent Office on Aug. 22, 2008, the entire content of which is hereby incorporated by reference. technical field [0003] The invention relates to the technical field of surface light-emitting devices and image display devices. In particular, the present invention relates to a technical field for reducing unevenness in luminance without increasing power consumption by arranging a protrusion direction of a protrusion portion of a part of an optical sheet in a predetermined direction. Background technique [0004] For example, an image display device including a backlight device (surface-emitting device) is used as an image display device for a word processor, a laptop personal computer, or the like. In many cases, an edge-light type backlight device is used as a surface-emitting device for such an i...

Claims

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Application Information

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IPC IPC(8): F21S2/00F21V5/00F21V7/04F21V5/08G02F1/13357G02F1/1333
CPCG02F1/133604G02F1/133606G02F2001/133607G02F1/133611G02F1/133607
Inventor 新开章吾柴田章广土井克浩浅冈聪子工藤泰之
Owner SONY CORP