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Area lighting source illumination device based on LED

A technology of LED light sources and lighting devices, which is applied to lighting devices, lighting auxiliary devices, lighting device components, etc., can solve the problems of complex structure, difficulty in achieving uniform surface light emission, and easy shading, etc., to achieve large area and overcome light Energy loss problem, the effect of improving robustness

Inactive Publication Date: 2008-09-24
TSINGHUA UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the existence of two reflections in this scheme, it increases the difficulty of light shaping, which brings difficulties to achieve uniform surface lighting; secondly, a part of the reflector is located between the light source and the diffuser, and the structure is complex, which is prone to shading

Method used

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  • Area lighting source illumination device based on LED
  • Area lighting source illumination device based on LED
  • Area lighting source illumination device based on LED

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Embodiment Construction

[0031] The invention provides an LED-based surface light source lighting device, the overall structure at least includes an LED light source, a reflective panel and a diffuser plate, without using a light guide plate. The light emitting surface of the luminaire adopts a diffuser plate to achieve angular uniformity; a reflective panel is provided between the LED light source module and the diffuser plate; through the reflective panel, part or all of the light emitted by the LED light source module is reflected to the diffuser plate, and a uniform shape is formed on the diffuser plate. Illuminance, to achieve the uniformity of light intensity. Through the following specific implementation examples, the advantages and characteristics of the present invention can be better understood.

[0032] figure 1 A schematic diagram of the surface light source structure in which the LED light source module is arranged on both sides and the light is fully reflected is given. In the figure, ...

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Abstract

The invention discloses an illumination device with a surface light source, which is based on LED and belongs to the semiconductor solid state lighting technology. The invention applies the light emitting diode as the light source, uses the optical reflection principle for the shaping of the emitting light from the light source to produce a uniform emitting surface and utilizes a light diffusing board to realize the uniform angular distribution. The whole structure at least comprises a LED light source module, a reflection panel and the light diffusing board; and a light guiding board is not used. The light emitting surface of a lamp utilizes the light diffusing board to realize the angular uniformity; the reflection panel is not mounted between the LED light source and the light diffusing board; part of the light or all of the light which is emitted from the LED light source module is reflected to the light diffusing board through the reflection panel; uniform illumination intensity is produced on the light diffusing board and the uniformity of the light intensity is realized. The LED surface illumination lamps with a plurality of structures are produced, which play the great energy saving advantage of the LED as much as possible and improve the stability, safety and reliability of the lamps simultaneously.

Description

technical field [0001] The invention belongs to the technical field of semiconductor solid-state lighting, and in particular relates to a light-emitting diode (light emitting diodes, abbreviated as LED) as a light source, using the principle of optical reflection to shape the light output of the light source to form a uniform light-emitting surface, and using an astigmatism plate to achieve uniform angular distribution. An LED-based surface light source lighting device. The lighting device includes an LED light source, a reflective panel and a diffuser panel, which has the characteristics of energy saving, high in-plane uniformity, soft light output, etc., and is easy to manufacture, and can meet many applications including indoor lighting, outdoor advertising light box lighting, and LCD backlighting. need. Background technique [0002] Since the 1990s, with the breakthrough and development of Gallium Nitride (GaN)-based LEDs in material growth, device manufacturing and pac...

Claims

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Application Information

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IPC IPC(8): F21S2/00F21V7/00F21V5/00F21V29/00F21V21/00F21Y101/02F21Y105/00F21K9/00F21V29/503F21V29/89F21Y105/10F21Y115/10
Inventor 罗毅韩彦军钱可元张贤鹏
Owner TSINGHUA UNIV
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