Light beam control component, light emitting device, surface light source device and display device

A technology for beam control components and light-emitting elements, which is applied in the directions of light sources, electric light sources, optical elements, etc., can solve the problems of uneven brightness, excess light, and large loss of light, and achieves less uneven brightness and light utilization efficiency. high effect

Active Publication Date: 2018-05-01
ENPLAS CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When the light reaching the back surface 26 is reflected by the back surface 26, the light directed directly above the light flux control member 20 is excessive, so that luminance unevenness occurs
In addition, when the light reaching the back surface 26 is emitted from the back surface 26, the light is absorbed by the substrate, so the loss of light is large.

Method used

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  • Light beam control component, light emitting device, surface light source device and display device
  • Light beam control component, light emitting device, surface light source device and display device
  • Light beam control component, light emitting device, surface light source device and display device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach 1

[0079] (Structure of surface light source device and light emitting device)

[0080] Figure 5~ Figure 7 It is a figure which shows the structure of the surface light source device of Embodiment 1. Figure 5A is a top view, Figure 5B is the main view. Figure 6A yes Figure 5B A cross-sectional view of line A-A is shown, Figure 6B yes Figure 5A The section view of line B-B is shown. Figure 7 will be Figure 6B An enlarged partial cross-sectional view of a part of .

[0081] As shown in FIGS. 5 and 6 , the surface light source device 100 according to Embodiment 1 includes a housing 110 , a plurality of light emitting devices 200 , and a light diffusion member 120 . A plurality of light emitting devices 200 are arranged in a matrix on the bottom plate 112 of the casing 110 . The inner surface of the bottom plate 112 functions as a diffuse reflection surface. In addition, an opening is provided in the top plate 114 of the casing 110 . The light-diffusing member 120...

Embodiment approach 2

[0126] (Structure of surface light source device and light emitting device)

[0127] The surface light source device and light emitting device of Embodiment 2 are similar to those shown in FIGS. Figure 7 The difference between the surface light source device 100 and the light emitting device 200 of the first embodiment shown is that the light flux control member 400 of the second embodiment is provided instead of the light flux control member 300 of the first embodiment. Therefore, in this embodiment, only the light flux controlling member 400 of Embodiment 2 will be described.

[0128] (Structure of Beam Control Parts)

[0129] 16 and 17 are diagrams showing the configuration of a light flux control member 400 according to the second embodiment. Figure 16A It is a perspective view seen from the inside, Figure 16B It is a sectional perspective view seen from the back side. Figure 17A is a top view, Figure 17B is the main view, Figure 17C is a bottom view, Figure 17...

Embodiment approach 3

[0138] (Structure of surface light source device and light emitting device)

[0139] The surface light source device and the light emitting device according to Embodiment 3 have the light flux control member 500 of Embodiment 3 instead of the light flux control member 300 of Embodiment 1, and are similar to FIGS. Figure 7 The surface light source device 100 and the light emitting device 200 of Embodiment 1 shown are different. Therefore, in this embodiment, only the light flux control member 500 of Embodiment 3 will be described.

[0140] (Structure of Beam Control Parts)

[0141] Figure 20 It is a sectional view of the light flux controlling member 500 according to the third embodiment.

[0142] Such as Figure 20 As shown, the light beam control component 500 has a concave portion 310 , an incident surface 320 , an outgoing surface 330 , a back surface 340 , a reflective portion 350 , a flange portion 560 and a plurality of leg portions 370 . Components that are the s...

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Abstract

This luminous flux control member (300) has: an incidence surface (320) through which light emitted from a light-emitting element (220) enters; an emission surface (330) through which the light entering from the incidence surface is emitted to the outside; and multiple ridges (352) that are formed on the back side so as to surround the central axis (CA) and that have a substantially triangular cross-sectional shape. Each of the multiple ridges (352) has a first reflecting surface (352a), a second reflecting surface (352b), and a ridge line (352c) which is the line of intersection of the first reflecting surface (352a) and the second reflecting surface (352b). An imaginary line containing the ridge lines (352c) intersects the central axis (CA) at a position closer to the front side than the ridge lines (352c).

Description

technical field [0001] The present invention relates to a light flux control member for controlling light distribution of light emitted from a light emitting element. In addition, the present invention relates to a light emitting device having the light flux control member, a surface light source device having the light emitting device, and a display device having the surface light source device. Background technique [0002] In a transmissive image display device such as a liquid crystal display device, a direct-type surface light source device is sometimes used as a backlight. In recent years, direct type surface light source devices having a plurality of light emitting elements as light sources have been used. [0003] For example, a direct type surface light source device has a substrate, a plurality of light emitting elements, a plurality of light flux control members (lenses), and a light diffusion member. A plurality of light emitting elements are arranged on the su...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F21V5/00F21S2/00F21V5/04G02B3/00G02B3/02G02F1/13357F21Y115/10
CPCF21S2/00F21V5/00F21V5/04F21Y2101/00G02B3/00G02B3/02G02F1/1336F21V13/02F21Y2115/10F21K9/60G02B19/0047G02F1/133603G02F1/133606G02F1/133607F21V7/0066
Inventor 高鸟洋
Owner ENPLAS CORP
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