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Luminous diode and surface light source device

A technology of light-emitting diodes and light-emitting surfaces, which is applied in the directions of luminescent materials, chemical instruments and methods, electrical components, etc., can solve the problems affecting the light-emitting uniformity of the surface light source device 90, etc., so as to improve the divergence angle and brightness, improve the light-emitting uniformity and effect of brightness

Inactive Publication Date: 2005-05-25
HONG FU JIN PRECISION IND (SHENZHEN) CO LTD +1
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Problems solved by technology

However, because the light emitting diode 1 generally has a maximum divergence angle of 120°, after the light beam emitted by it enters the light guide plate 2 through the light incident surface 21, the spatial area within the range of 120° relative to the light guide plate 2 with the light emitting diode 1 as the center is in the Bright state, however, there will be a dark band 23 between the adjacent light emitting diodes 1 that cannot be irradiated by the light beam, and the dark band 23 will affect the light uniformity of the surface light source device 90

Method used

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  • Luminous diode and surface light source device
  • Luminous diode and surface light source device
  • Luminous diode and surface light source device

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Embodiment Construction

[0015] see image 3 , is a schematic plan view of the surface light source device of the present invention, the surface light source device 900 includes a plurality of light emitting diodes 10 and a light guide plate 20 . The plurality of light emitting diodes 10 emit light beams, and the light guide plate 20 guides the transmission direction of the light beams emitted by the light emitting diodes 10, and converts them into surface light sources for emission.

[0016] The light guide plate 20 is flat and made of transparent materials such as acrylic, glass or polycarbonate, and includes a light incident surface 201, a light exit surface (not shown) connected to the incident surface 201, and a light exit surface. The opposite bottom surface 203 . The light incident surface 201 receives the light beam emitted by the LED 10 . The light emitting surface can be processed into a rough surface with a certain roughness. The bottom surface 203 of the light guide plate 20 is provided...

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Abstract

This invention discloses a area light source which contains a light conductive board and at least a LED, said light conductive board contains at least a light incidence face and light emergent face, at least one LED is set corresponding to said light conductive board, said LED contains a substrate, a lighting chip and a package structure which covers said lighting chip to form a emergent face and is doped with plurality of fluorescent micro-grain.

Description

【Technical field】 [0001] The invention relates to a light-emitting diode and a surface light source device, in particular to a light-emitting diode with a large divergence angle and a surface light source device using the light-emitting diode as a light source. 【Background technique】 [0002] Because light-emitting diodes save power and have high brightness, they are widely used in surface light source devices of mobile phones, PDAs (Personal Digital Assistants, personal digital assistants), and displays. The basic structure of light-emitting diodes can be found in figure 1 , the light emitting diode 1 includes a substrate 16 , a light emitting chip 13 and an encapsulation structure 15 , the light emitting chip 13 is fixed on the substrate 16 and covered by the encapsulation structure 15 . The encapsulation structure 15 is generally made of transparent epoxy resin or plastic material, and the maximum divergence angle of the LED 1 is usually 120°. [0003] For an optical pa...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K11/00H01L33/00
Inventor 吕昌岳余泰成陈杰良
Owner HONG FU JIN PRECISION IND (SHENZHEN) CO LTD
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