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Light guide plate with sharp-edged prisms and side-edge type surface-emission optical apparatus including the same

An optical device and surface emission technology, applied in optics, optical components, light guides, etc., can solve problems such as deterioration and achieve the effect of improving light distribution control efficiency

Active Publication Date: 2015-01-14
STANLEY ELECTRIC CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the region R, the flexible reflective sheet 4 partially spreads the light reflected by the descending slope 12b, so that the light emitting surface S of the light guide plate 1 out The so-called wetting phenomenon occurs in the Figure 20 As shown, this will worsen Figure 18 Light distribution characteristics of the prism sheet 3

Method used

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  • Light guide plate with sharp-edged prisms and side-edge type surface-emission optical apparatus including the same
  • Light guide plate with sharp-edged prisms and side-edge type surface-emission optical apparatus including the same
  • Light guide plate with sharp-edged prisms and side-edge type surface-emission optical apparatus including the same

Examples

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Embodiment Construction

[0036] figure 1 Is a cross-sectional view illustrating a side edge type surface emitting optical device, in figure 1 Among them, the side edge type surface emitting optical device includes the first embodiment of the light guide plate according to the subject of the present disclosure, Figure 15A , Figure 15B with Figure 15C The light guide plate 1 is replaced by the light guide plate 1A, and the triangular prism sequence 12A of the light guide plate 1A is different from Figure 15A , Figure 15B with Figure 15C The triangular prism sequence in 12.

[0037] figure 2 Yes figure 1 A partial enlarged cross-sectional view of the light guide plate 1A, in figure 2 In each pitch P, each prism 12PA of the triangular prism sequence 12A has an asymmetric structure, which is formed by a rising slope 12c and two linear falling slopes 12d and 12e. The slope angle of the rising slope 12c is defined by β0, The inclination angles of the two linear descending slopes 12d and 12e are defined b...

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PUM

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Abstract

In a light guide plate having a light incident surface, a light distributing control surface perpendicular to the light incident surface and a light emitting surface opposing the light distributing control surface, a flat mirror-finish portion is provided on a first area of the light distributing control surface, and a prism sequence is provided on a second area of the light distributing control surface where the flat mirror-finish portion is not provided. The prism sequence is protruded with respect to the flat mirror-finish portion. Each prism of the prism sequence has a rising sloped surface opposing the light incident surface, a first falling sloped surface connected to the rising sloped surface, and a second falling sloped surface connected to the first falling sloped surface, A slope of the first falling sloped surface is larger than a slope of the second falling sloped surface.

Description

Technical field [0001] The presently disclosed subject matter relates to a light guide plate used in a liquid crystal display (LCD) unit and a side edge type surface emitting optical device including the light guide plate. Background technique [0002] The edge-type surface-emitting optical device used for the LCD unit has the advantage of a light and thin structure. [0003] Figure 15A Is a plan view illustrating a prior art edge-type surface emitting optical device, Figure 15B with Figure 15C Are along Figure 15A Intercepted from midline B-B and line C-C Figure 15A A cross-sectional view of the side edge type surface emitting optical device (see: JP2009-81094A and US2009 / 0086509A1 figure 1 (a) and Picture 9 ). [0004] in Figure 15A , Figure 15B with Figure 15C Among them, the edge-type surface emitting optical device is composed of a light guide plate 1, which is made of a transparent material, such as acrylic resin or polycarbonate resin, and has a light incident surface S ...

Claims

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Application Information

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IPC IPC(8): G02B6/00
CPCG02B6/0025G02B6/0038G02B6/0016
Inventor 千千波和海
Owner STANLEY ELECTRIC CO LTD