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Light guide plate and edge-type surface-emitting optical device including the light guide plate

An optical device, 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: 2019-05-14
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 o 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 and edge-type surface-emitting optical device including the light guide plate
  • Light guide plate and edge-type surface-emitting optical device including the light guide plate
  • Light guide plate and edge-type surface-emitting optical device including the light guide plate

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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 edge-type surface-emitting optical device includes the first embodiment of the light guide plate according to the disclosed subject matter, Figure 15A , Figure 15B with Figure 15C The light guide plate 1 in is replaced by the light guide plate 1A, the triangular prism sequence 12A of the light guide plate 1A is different from Figure 15A , Figure 15B with Figure 15C Triangular prisms in sequence 12.

[0037] figure 2 yes figure 1 A partially enlarged cross-sectional view of the light guide plate 1A, in figure 2 Among them, each prism 12PA of the triangular prism sequence 12A in each pitch P has an asymmetric structure, the structure is formed by a rising slope 12c and two straight-line falling slopes 12d and 12e, the inclination angle of the rising slope 12c is limited by β0, The inclination angles of the two linear descending sl...

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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 disclosed subject matter relates to a light guide plate used in a liquid crystal display (LCD) unit and an edge-type surface emitting optical device including the light guide plate. Background technique [0002] Edge-type surface-emitting optics for LCD units have the advantage of a thin and light structure. [0003] Figure 15A is a plan view illustrating a prior art edge-type surface-emitting optical device, Figure 15B with Figure 15C are respectively along Figure 15A Intercepted by midline B-B and line C-C Figure 15A The cross-sectional view of the edge-type surface-emitting optical device (see: JP2009-81094A and US2009 / 0086509A1 figure 1 (a) and Figure 9 ). [0004] exist Figure 15A , Figure 15B with Figure 15C Among them, the edge-type surface-emitting optical device is constituted by a light guide plate 1 made of a transparent material such as acrylic resin or polycarbonate resin, having a light incident surface S i , perpendi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G02B6/00
CPCG02B6/0038
Inventor 千千波和海
Owner STANLEY ELECTRIC CO LTD