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Light guide apparatus

A technology of light guides and light sources, which can be used in signal devices, lighting devices, small compartment lighting devices, etc., and can solve problems such as poor appearance

Inactive Publication Date: 2015-06-10
KOJIMA PRESS IND CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, since the annular portion 3a has a ring shape extending continuously over the entire circumference in the circumferential direction, the portion 3e closer to the outer peripheral extension portion 3c is adjacent to the portion 3f farther therefrom, and the portion 3e farther from the outer peripheral extension portion 3c is adjacent to it. The luminance difference between the closer part 3d and the farther part 3e appears significantly, and the appearance deteriorates

Method used

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  • Light guide apparatus
  • Light guide apparatus
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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0061] [Example 1] ( Figure 1 to Figure 4 )

[0062] In Example 1 of the present invention, the case where the boundary surface 42 reflects all the light introduced into the light guide body 30 from the light receiving surface 32 and proceeds to the boundary surface 42 is shown.

[0063] Such as Figure 4 As shown, the boundary surface 42 is provided only in a part of the thickness direction of the outer peripheral extending portion 33 (the direction perpendicular to the traveling direction of light traveling in the outer peripheral extending portion 33 , the axial direction of the annular portion 31 ). That is, the layer portion 41 and the concave portion 33 for forming the layer portion 41 are provided only in a part of the thickness direction of the outer peripheral side extension portion 33 .

[0064] The function of Embodiment 1 of the present invention will be described.

[0065] (a) The light guided from the light receiving surface 32 into the light guide 30 and pro...

Embodiment 2

[0068] [Example 2] ( Figure 5 ~ Figure 7 )

[0069] In Example 2 of the present invention, as Figure 7 As shown, the boundary surface 42 reflects only a part of the light introduced into the light guide body 30 from the light receiving surface 32 and travels to the boundary surface 42, and the remaining light is refracted and enters the layer portion 41. .

[0070] Such as Figure 6 As shown, the boundary surface 42 is provided over the entire thickness direction of the outer peripheral extending portion 33 (the direction perpendicular to the traveling direction of light traveling in the outer peripheral extending portion 33 , the axial direction of the annular portion 31 ). That is, the layer portion 41 and the concave portion 33 for forming the layer portion 41 are provided over the entire thickness direction of the outer peripheral side extension portion 33 .

[0071] The function of Embodiment 2 of the present invention will be described.

[0072] (a) Part of the li...

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PUM

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Abstract

An apparatus (10) has a light source (20), a light guide (30), and a light reflecting mechanism (40). The light guide (30) is provided with: a ring-like section (31), which continuously extends over the whole circumference in the circumferential direction; a light receiving surface (32), from which light emitted from the light source (20) is introduced into the light guide (30); and an outer circumferential-side extending section (33), which is provided such that the section extends to the outer circumferential side of the ring-like section (31) from the ring-like section (31), and which makes the light enter the ring-like section (31) from the one direction (D1) of the circumferential directions of the ring-like section (31), said light having been introduced into the light guide (30) from the light receiving surface (32). The light reflecting mechanism (40) reflects a part of the light introduced into the light guide (30) from the light receiving surface (32), and makes the part of light enter the ring-like section (31) from the direction (D2) that is the opposite direction to the one direction (D1) of the circumferential directions of the ring-like section (31).

Description

technical field [0001] The present invention relates to a light guide device. Background technique [0002] Such as Figure 8 , Figure 9 As shown, Patent Document 1 discloses a light guide device 1 having a single light source 2 and a light guide 3 . The light guide 3 is provided with: an annular portion 3a extending continuously over the entire circumference in the circumferential direction; One direction D of the circumferential direction enters the annular portion 3a. [0003] Light entering the annular portion 3 a from one direction D is totally reflected at the boundary surface 5 between the annular portion 3 a and the atmosphere on the outer peripheral side of the annular portion 3 a, and travels in one direction D in the annular portion 3 a. In addition, the light entering the annular portion 3 a is diffusely reflected by the surface treatment applied to the inner peripheral surface 3 d of the annular portion 3 . Therefore, the annular portion 3a emits light in a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F21S2/00F21Y101/02
CPCB60Q3/64B60Q3/20B60N3/10G02B6/001B60K35/60B60K2360/20B60Q3/229B60K2360/341B60K2360/336B60Q3/43G02B6/002G02B6/0045
Inventor 坂梨胜利宇根友也神取宏和
Owner KOJIMA PRESS IND CO LTD