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Light emitting panel

A light-emitting panel and light-emitting surface technology, which is applied in the direction of optics, light guides, optical components, etc., can solve the problems of increasing the cost of lighting panels, and achieve the effect of reducing costs

Inactive Publication Date: 2011-06-29
INTEMATIX
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

As described, to alleviate the problem of emission intensity uniformity, a large number of closely spaced lower power LEDs can be used, but this can significantly increase the cost of the lighting panel

Method used

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Embodiment Construction

[0049] The embodiments of the present invention are directed to a light emitting panel including a light guide medium, wherein light is coupled into one or more edges of the medium so that the light guide is within the entire volume of the medium by total internal reflection. The light guide medium has at least one light-emitting surface and optical features or optical discontinuity patterns on the light-emitting surface and / or the opposite surface of the medium, so as to promote light emission from the light-emitting surface. The characteristic pattern is configured to reduce (preferably minimize) the variation of the emitted light intensity over substantially the entire surface of the light emitting surface, that is, the characteristic pattern promotes substantially uniform light from the light emitting surface Emission intensity. In embodiments of the present invention, the intensity change is generally less than or equal to about 25%, and preferably less than or equal to 10...

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Abstract

A light emitting panel comprises a light guiding medium having at least one light emitting face and a plurality of light sources (LEDs) configured to couple light into an edge of the light guiding medium at four or fewer locations around the edge. A pattern of optical features (discontinuities) is provided on at least one face of the light guiding medium for promoting emission of light from the light emitting face. The pattern of features is configured such as to reduce a variation in emitted light intensity over substantially the entire surface of the light emitting face such that the variation is less than or equal to about 25%. The pattern of features is configured in part in dependence on a light intensity distribution within the light guiding medium and the spacing, size, shape and / or number of features per unit area can depend on distance from each light source.

Description

[0001] Priority claim [0002] This application claims priority to the U.S. non-provisional patent application No. 12 / 182,835 entitled "LIGHT EMITTING PANEL" filed by Yi-Qun Li on July 30, 2008, so The said patent application is incorporated herein by reference in its entirety. Technical field [0003] The invention relates to a light emitting panel including a light guide medium having at least one light emitting surface. More specifically (but not exclusively), embodiments of the present invention are directed to a light-emitting panel that is substantially planar in form, in which light from a light source (usually a light-emitting diode (LED)) is coupled to one or More than one edge, and then emit from the light-emitting surface. Background technique [0004] The lighting fixtures commonly found in offices and commercial premises are fluorescent lighting panels. Generally, this type of lighting panel includes a light box, which includes a housing containing one or more fluore...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F21V8/00F21V9/40
CPCG02B6/0055G02B6/002G02B6/0036G02B6/0085G02B6/0038G02B6/005G02B6/0001
Inventor 李依群
Owner INTEMATIX
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