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Light flux controlling member, light emitting apparatus, surface light source apparatus and display apparatus

A technology of light beam control components and light emitting devices, which is applied in the direction of light sources, optical elements, point light sources, etc., can solve problems such as uneven brightness, uneven brightness, and decline in lighting quality, so as to prevent uneven brightness and uniform lighting , the effect of high-grade lighting quality

Active Publication Date: 2011-03-30
ENPLAS CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0027] However, in the lens body disclosed in Patent Document 1, since the lens portion and the positioning portion are formed of different kinds of materials, the cost of the lens body increases.
[0028] In addition, when the flange 14 of the light beam control member 4 disclosed in Patent Document 2 forms the leg portion 15 and is mounted to the substrate 17 with a black adhesive 16, sometimes the portion of the adhesive 16 absorbs light and may interfere with the light beam. The display surface of the control unit 4 affects
Additionally, if image 3 As shown in (a), when viewed from above, the position of the leg portion 15 is reflected in the light diffusion member 2 ( figure 2 ), resulting in brightness unevenness in brightness
Additionally, if figure 2 As shown, if a plurality of light beam control members 4 are arranged, the light diffusion member 2 ( figure 2 ) appears as a faintly visible dark line
Uneven brightness becomes an obstacle to uniform area lighting and degrades lighting quality

Method used

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  • Light flux controlling member, light emitting apparatus, surface light source apparatus and display apparatus
  • Light flux controlling member, light emitting apparatus, surface light source apparatus and display apparatus
  • Light flux controlling member, light emitting apparatus, surface light source apparatus and display apparatus

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Embodiment approach 1

[0057] Figure 4 It is a diagram showing a detailed configuration of the light flux control member according to Embodiment 1 of the present invention. The beam control member of this embodiment can be applied to figure 1 A surface light source device 1 and a liquid crystal display panel. The beam control member 100 of this embodiment replaces Figure 1 to Figure 3 The beam control component 4 is used. In addition, the reference optical axis refers to the traveling direction of light at the center of the three-dimensional emitted light beam emitted from the light flux control member 100 . In this embodiment, a case where the optical axis of the light emitting element 3 coincides with the reference optical axis will be described as an example.

[0058] The light flux control member 100 is a diffuser lens that controls the traveling direction of light emitted from the light emitting element 3 , and is, for example, an aspherical lens. The light flux control member 100 is for...

Embodiment approach 2

[0105] Figure 8 It is a diagram showing a detailed configuration of a light flux control member according to Embodiment 2 of the present invention. exist Figure 8 in, right with Figure 4 The same structural parts are given the same reference numerals, and descriptions of overlapping parts are omitted. The beam control member 200 of this embodiment replaces Figure 1 to Figure 3 The beam control component 4 is used.

[0106] The light flux control member 200 is a diffuser lens that controls the traveling direction of light emitted from the light emitting element 3 , and is, for example, an aspheric lens. The light beam control part 200 is in the diffusion lens part and Figure 4 The light beam control component 100 has the same structure.

[0107]The light beam control member 200 includes: a light control exit surface 110, which controls the traveling direction of light emitted from the light emitting element 3 and whose planar shape is approximately circular; Among t...

Embodiment approach 3

[0117] Figure 10 It is a diagram showing a detailed configuration of a light flux control member according to Embodiment 3 of the present invention. right with Figure 4 The same structural parts are given the same reference numerals, and descriptions of overlapping parts are omitted. The light beam control member 300 of this embodiment replaces Figure 1 to Figure 3 The beam control component 4 is used.

[0118] The light beam control member 300 is a diffusion lens for controlling the traveling direction of light emitted from the light emitting element 3 , and is, for example, an aspheric lens. The light beam control part 300 is in the diffusion lens part and Figure 4 The light beam control component 100 has the same structure.

[0119] The light beam control part 300 includes: a light control exit surface 110, which controls the traveling direction of light emitted from the light emitting element 3 and whose planar shape is approximately circular; Of the light emitte...

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PUM

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Abstract

A light flux controlling member can prevent unevenness in the uniformity of brightness due to the glueing of leg parts. This light flux controlling member (100) has: a virtually annular flange (140) that projects outward of a radial direction of a third emission surface (110c) of a light controlling emission surface (110); and leg parts (150) of a round stick shape that are arranged within a range of area width L in a back surface (120) and on the reference optical axis side of the boundary between the flange (140) and the third emission surface (110c), and area width L is given according to the following equation. L=ttan(+-[beta]), where: t is the thickness of the flange (140) or the height from the back surface (120) to the outermost rim part (110d); [alpha] is an angle of incidence of a light (113) that is parallel to the reference optical axis and that is incident on the light controlling emission surface (110) in the outermost rim part (110d); and [beta] is an angle of emission of a refraction light (115) that is generated when the light (113) parallel to the reference optical axis is incident on the light controlling emission surface (110) from the outermost rim part (110d),and that is emitted from the light controlling emission surface (110).

Description

technical field [0001] The present invention relates to a light flux control member, a light emitting device, a surface light source device, and a display device, for example, to a light flux control member used as a light source for a backlight that illuminates laterally from the back of a liquid crystal display panel, or for indoor general lighting, and other lighting , a light-emitting device, a surface light source device for various lighting, and a display device that uses a surface light source device as a lighting device in combination with an illuminated component. Background technique [0002] Conventionally, a surface light source device using a plurality of light emitting diodes (LEDs) as point light sources is known as lighting equipment used for liquid crystal display monitors such as personal computers and televisions. [0003] In the surface light source device, a plurality of LEDs are arranged in a matrix on the back side of a plate-shaped diffusion member ha...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F21V5/04H01L33/58F21Y101/02
CPCG02B19/0061G02B27/0916G02B7/023G02B19/0014
Inventor 山口昌男
Owner ENPLAS CORP