LED light source with wide-angle lens

A technology of LED light source and wide-angle lens, applied in the field of LED light source, can solve problems such as excessive angle, reduced light efficiency, unfavorable energy-saving contrast, etc., to increase astigmatism angle, reduce light mixing distance, improve refraction effect and light utilization rate Effect

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

Problems solved by technology

In order to increase the astigmatism angle of the reflective part, the reflective part should be as large as possible, but if the reflective part is too large, the reflected light angle will be too large or even change the propagation direction by more than 90 degrees. At this time, the reflected light must pass through the backlight module side The reflection of the wall or the bottom surface is emitted from the vertical LCD plane, which greatly reduces the light efficiency and makes the LED lose the ability to be dynamically controlled in the area, which is not conducive to energy saving and improvement of contrast

Method used

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  • LED light source with wide-angle lens
  • LED light source with wide-angle lens
  • LED light source with wide-angle lens

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Embodiment Construction

[0037] The present invention will be further described below in conjunction with the accompanying drawings and typical embodiments.

[0038] figure 2 It is a schematic diagram of the LED light source and its light path of the present invention.

[0039] See figure 2 , the LED light source of the present invention comprises a base 21, an LED light-emitting chip 22 and a lens, the LED light-emitting chip 22 and the lens have the same central axis 20, and the LED light-emitting chip 22 is wrapped with a packaging material 23, wherein the lens has the same The central axis is composed of multi-layer media, and the refractive index of the multi-layer media increases in sequence along the central axis 20 outward.

[0040] In this embodiment, six layers of different dielectric layers are taken as an example. The lens includes a first layer of lenses 24, a second layer of lenses 25, a third layer of lenses 26, a fourth layer of lenses 27, and a fifth layer of lenses along the cent...

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Abstract

The invention relates to an LED light source with a wide-angle lens, comprises a base, an LED luminescence chip and a lens; the LED luminescence chip and the lens have same central axis; wherein the lens is made of a plurality of layers of mediums which have same central axis; and the index of refraction of the plurality of layers of mediums increases sequentially and outward along the central axis. The LED light source with a wide-angle lens has a plurality of layers of mediums with the gradually changing index of refraction, effectively widens the angle of diffused light, reduces the distance of mixed light and realizes thinning of the backlight module.

Description

technical field [0001] The invention relates to a light emitting diode (LED light source), in particular to an LED light source with a wide-angle lens. 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); strong color expression can significantly enhance image quality; most importantly, because they are 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 directi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F21V5/04H01L33/00F21Y101/02F21Y115/10
Inventor 邢亮
Owner 上海广电光电子有限公司
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