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

A technology for light-emitting devices and light-emitting elements, which is applied to light sources, point light sources, lighting devices, etc., can solve the problems of reduced lighting quality, uneven brightness, and uneven brightness, achieve high-grade lighting quality, prevent uneven brightness, Uniform lighting effect

Active Publication Date: 2013-08-28
ENPLAS CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[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
In addition, 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 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 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; Amon...

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 emitt...

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PUM

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Abstract

A light flux controlling member has a flange projecting outward of a radial direction of a light controlling emission surface and leg parts arranged within a range of area width L in a back surface and on the reference optical axis side of the boundary between the flange and the light controlling emission surface, and L is given by L=t×tan(alpha-beta), where: t is the thickness of the flange or the height from the back surface to the outermost rim part; alpha is an angle of incidence of a light parallel to the reference optical axis and incident on the light controlling emission surface in the outermost rim part; and beta is an angle of emission, from the light controlling emission surface, of a refraction light generated when the light parallel to the reference optical axis is incident on the light controlling emission surface from the outermost rim part.

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 Patents(China)
IPC IPC(8): G02B3/00F21V5/04H01L33/58F21Y101/02
CPCG02B19/0061G02B7/023G02B19/0014
Inventor 山口昌男
Owner ENPLAS CORP