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LED light source device

A technology of LED light source and light mixing, which is applied in the field of light-emitting diodes, can solve the problems of uneven light mixing, single structure, and limited light mixing distance, and achieve the effect of improving light efficiency and uniformity, and realizing thinning

Inactive Publication Date: 2009-10-14
上海广电光电子有限公司
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AI Technical Summary

Problems solved by technology

This scheme has a single structure, poor light mixing effect, and the reduction of light mixing distance is very limited, which is prone to uneven light mixing

Method used

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  • LED light source device
  • LED light source device
  • LED light source device

Examples

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Embodiment Construction

[0032] The present invention will be further described below in conjunction with the accompanying drawings and typical embodiments.

[0033] figure 2 It is a schematic diagram of the light path of the LED backlight structure of the present invention.

[0034] See figure 2 , the LED light source of the present invention includes a PCB board 21, a plurality of LEDs 22 distributed on the PCB board 21 at a certain distance, and a light mixing plate arranged above the PCB board and the LEDs, wherein the light mixing plate includes a lower light mixing plate 23 glued together And the upper light mixing plate 24, the lower light mixing plate 23 is formed with a first cavity 231 for accommodating LEDs, and the upper light mixing plate 24 is formed with a second cavity 241 directly above the LED 22, and the first cavity 231 is a hemispherical cavity. The second cavity 241 is an approximately semi-ellipsoidal cavity.

[0035] In this embodiment, a diffuser plate 14, a diffuser shee...

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PUM

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Abstract

The invention relates to an LED light source device, comprising a PCB board, a plurality of LEDs arranged on the PCB board, and light mixing boards arranged above the LEDs; wherein the light mixing boards comprises a lower light mixing board and an upper light mixing board; a first cavity containing the LEDs is formed on the lower light mixing board; a second cavity is formed on the lower light mixing board and is positioned right above the LEDs; the first cavity is a hemispherical-shaped cavity; and the second cavity is shaped as an approximate hemi-ellipsoid. The LED light source device can effectively improve efficiency of light and uniformity and realize thinning of large-size direct backlight module.

Description

technical field [0001] The invention relates to a light emitting diode (LED light source), in particular to an LED light source device. Background technique [0002] Light-emitting diode (LED) backlight has many advantages: all solid-state structure, good mechanical strength; low working voltage, long life; strong color performance, green environmental protection; TV's backlight. Especially in the field of large-size LCD TVs, LED backlights have given full play to their characteristics: solid-state light sources are not as fragile as cold-cathode lamps (CCFLs); the color expression is strong, which can significantly enhance the picture quality; the most important thing is that it is Point light source, easy to control the dynamic area drive to achieve energy saving and improve contrast. Due to the above advantages of LED itself, the future development trend is that LED backlights will replace CCFL backlights and become the mainstream light source. [0003] The development...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F21S2/00F21V5/00F21V5/08G02F1/13357F21Y101/02F21K9/23F21K9/62F21Y115/10G02F1/1335
Inventor 邢亮
Owner 上海广电光电子有限公司
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