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Lightguide having opening and surrounding channel

A channel and light guide technology, applied in the field of light guide, can solve the problems of high cost and complicated assembly

Inactive Publication Date: 2021-06-22
3M INNOVATIVE PROPERTIES CO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Assembly of such systems can be complex, especially when using flexible light guides, and can be costly due to the number of LEDs required

Method used

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  • Lightguide having opening and surrounding channel
  • Lightguide having opening and surrounding channel
  • Lightguide having opening and surrounding channel

Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach 1

[0068] Embodiment 1 is an optical system comprising: a light guide comprising: opposed top and bottom major surfaces; a circular through-opening extending from the top major surface to the bottom a major surface; an elongated first channel formed in one of the top major surface and the bottom major surface and at least partially surrounding and substantially adjacent to the opening concentric, the first channel has a depth (d) that varies along the length of the first channel; and a plurality of optical extractors for extracting light that would otherwise be within the light guide and along the The light propagated by the light guide.

Embodiment approach 2

[0069] Embodiment 2 is the optical system of embodiment 1, wherein the circular through-opening is substantially circular.

Embodiment approach 3

[0070] Embodiment 3 is the optical system of embodiment 1, wherein the elongated first channel is a closed loop channel.

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PUM

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Abstract

An optical system includes a lightguide having opposing top and bottom major surfaces. A round through opening extends between the two surfaces of the lightguide. An elongated channel is formed in one of the surfaces and at least partially surrounds and is substantially concentric with the opening. The channel has a depth (d) that varies along its length. Light extractors extract light that would otherwise propagate within and along the lightguide. The features of the lightguide can be varied to optimize performance of the lightguide for various purposes.

Description

[0001] This application is a divisional application of a patent application (International filing date: February 14, 2019, application number 201880050825.0, title of the invention is "light guide with opening and surrounding channel"). technical field [0002] The present disclosure generally relates to light guides. Background technique [0003] Light guides can be used to provide illumination for a variety of applications. For example, light guides have been used in display backlights, general lighting, and automotive taillights. A plurality of light sources may be distributed along an end of the light guide to provide light into the light guide, and the light guide may include light extraction features for extracting light from the light guide. [0004] A plurality of light emitting diodes (LEDs) are typically arranged along one or both ends of the area light guide for light injection. The number of LEDs and their spacing are generally determined by the total amount an...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B6/00
CPCG02B6/0001G02B6/0035G02B6/0045G02B6/002G02B6/0028G02B6/0036G02B6/006
Inventor 刘涛卢永上大卫·C·默科德布莱恩·W·欧斯特利
Owner 3M INNOVATIVE PROPERTIES CO