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Light emitting device and projection displaying system

A light-emitting device and a technology for exciting light, applied in the field of light sources, can solve the problems of insufficient brightness of LED light sources and insufficient luminous flux of light valves, and achieve the effects of high excitation energy and high brightness

Inactive Publication Date: 2014-03-19
吴震
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Problems solved by technology

However, the main problem at present is that the brightness of the LED light source is not enough
For example, for a light valve of a certain size, its etendue has been determined, that is, the number of LEDs is limited, and the insufficient brightness of a single LED directly leads to insufficient luminous flux incident on the light valve.

Method used

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  • Light emitting device and projection displaying system
  • Light emitting device and projection displaying system

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Embodiment Construction

[0020] figure 1 It is a structural schematic diagram of the first embodiment of the present invention. Such as figure 1 As shown, the present invention proposes a light-emitting device, including a light-emitting diode chip 101, the surface of the light-emitting diode chip 101 is covered with a wavelength conversion layer 102, and the first light emitted by the light-emitting diode chip 101 can excite the wavelength conversion coating 102 to make it emit light. Subject to laser light 132 . Specifically, in this embodiment, the first light emitted by the light-emitting diode chip is blue light, and the wavelength conversion layer contains yellow or yellow-green or green wavelength conversion materials, so that the wavelength conversion layer can absorb the first light and emit yellow light. Light or yellow-green light or green light. Preferably, the wavelength conversion layer contains a YAG system fluorescent material (such as fluorescent powder). In practical applications...

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Abstract

The invention provides a light emitting device and a projection displaying system. The light emitting device comprises a light emitting diode chip, wherein a wavelength conversion layer is coated on the surface of the light emitting diode chip, and first light emitted by the light emitting diode chip can excite the wavelength conversion layer to emit excited light. The light emitting device further comprises an excitation source, wherein excitation light emitted by the excitation source is emitted into the wavelength conversion layer on the surface of the light emitting diode chip to enable the wavelength conversion layer to emit excited light. According to the light emitting device, two sides of the wavelength conversion layer are excited by the light emitted by the light emitting diode chip and the light emitted by the excitation source, therefore, excitation energy is high, and then brightness is high.

Description

[0001] technical field [0002] The invention relates to the field of light sources, in particular to a light emitting device and a projection display system using the light emitting device. [0003] Background technique [0004] The projection display technology is developing rapidly at present, and the light emitting diode (LED) light source, as a new type of light source, has been widely used in the projection display technology. However, the main problem at present is that the brightness of the LED light source is insufficient. For example, for a light valve of a certain size, its etendue has been determined, that is, the number of LEDs is limited, and insufficient brightness of a single LED directly leads to insufficient luminous flux incident on the light valve. Especially the green LED is the bottleneck of the whole LED light source system. [0005] Contents of the invention [0006] In view of the above problems, the present invention proposes a light-emitting ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G03B21/20F21V13/12F21Y101/02F21Y115/10
Inventor 吴震
Owner 吴震
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