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Luminous body

A technology of luminous body and light source, applied in the field of luminous body, can solve the problem of low reflection loss, achieve the effect of simplifying manufacturing and reducing cost

Inactive Publication Date: 2009-08-12
KONINKLIJKE PHILIPS ELECTRONICS NV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] A common problem in all these configurations is how to distribute the light originating from a more or less point-shaped light source as evenly as possible on the light-emitting surface while using the light efficiently, i.e. with as low a reflection loss as possible

Method used

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Embodiment Construction

[0025] figure 1 is a schematic cross-sectional view of a luminous body in the form of a substantially planar or planar light source according to the present invention.

[0026] The illuminant comprises a housing 1 having a depth of, for example, about 10 to 15 mm, and its length and width corresponding to the desired dimensions of a planar light source, so that light is emitted from a light-emitting surface 6, which is at the edge of the housing 1. The upper side closes it.

[0027] On the lower side of the housing 1 opposite the upper side, there is a bottom surface 2 into which a plurality of light sources 3, 5 have been inserted. The light sources 3, 5 are fixed to the bottom surface 2 and are contacted in the usual way. The light sources 3 , 5 are selected and arranged here in such a way that they radiate light at least substantially only in the lateral direction, ie in the length and / or width direction of the light.

[0028] The light sources 3, 5 used are preferably L...

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Abstract

A luminous body is described, in particular in the form of a planar illumination device for general lighting or for backlighting of displays, wherein the luminous body comprises a plurality of light sources arranged in a housing (1) such as, for example, LED elements (3, 5). The luminous body is remarkable in that the light of the light sources is radiated at least substantially in a direction parallel to a light emission surface (6) of the housing (1), while the inner walls of the housing (1) reflect the light at least partly. Not only does this render it possible to achieve a very homogeneous light distribution on the light emission surface (6) also in the case of a small constructional height of the luminous body, but the fact that no optical waveguide plate is required in the housing (1) also provides advantages in the form of a simple manufacture and low cost.

Description

technical field [0001] The invention relates to a luminaire, in particular in the form of a planar lighting device for general lighting or backlighting of displays, comprising a plurality of light sources, such as for example LED components arranged in a housing. Background technique [0002] Surface lighting devices for producing mixed colors are known from DE 10102586.6 and DE 10102585.8. These lighting devices basically consist of an optical waveguide plate in which a plurality of cavities are provided, each cavity housing an LED. Each cavity has an upper side and side walls facing the light emitting surface of the optical waveguide plate. The upper side of each cavity is coated with a reflective layer, so that the light generated by the light source inserted in the cavity is only coupled into the optical waveguide plate through the side wall of the cavity. This "cavity lighting" configuration enables uniform mixing and distribution of the light from the individual ligh...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F21S8/00G09F13/04F21Y105/00F21Y101/02F21V8/00
CPCF21Y2105/001F21S8/00G02B6/003G02B6/0021F21Y2101/02F21Y2105/10F21Y2115/10F21V9/30G02B6/0001
Inventor H·格雷纳
Owner KONINKLIJKE PHILIPS ELECTRONICS NV
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