Light emitting device and a projection system

A technology of light-emitting device and light-concentrating system, which is applied to lighting devices, projection devices, components of lighting devices, etc. Effect

Active Publication Date: 2014-09-17
APPOTRONICS CORP LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] However, since the focal length of the condensing lens 130 is very long, the

Method used

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  • Light emitting device and a projection system
  • Light emitting device and a projection system
  • Light emitting device and a projection system

Examples

Experimental program
Comparison scheme
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Example Embodiment

[0056] Example two

[0057] Figure 5a It is a front view of the structure of another embodiment of the light-emitting device of the present invention, such as Figure 5a As shown, the light-emitting device includes a laser array light source 310, a collimating lens array 320, a reflective light collection system 330, and a light collection system 340. The light collection system 340 includes a concave lens 342 and a light homogenizing rod 341. Image 6 for Figure 5a The right view of the structure of the laser array light source shown in Image 6 As shown, the laser array light source 310 includes a light-emitting area 311 and a non-light-emitting area 312.

[0058] The light-emitting device of this embodiment is different from the light-emitting device shown in FIG. 3 in:

[0059] In the embodiment shown in FIG. 3, since the light exit surface of the laser array light source 210 is large, the area of ​​the reflector 230 should be large enough to collect all the light emitted by th...

Example Embodiment

[0069] Example three

[0070] Figure 7a It is a front view of the structure of another embodiment of the light-emitting device of the present invention, such as Figure 7a As shown, the light-emitting device includes a laser array light source 410, a collimating lens array 420, a reflective light collection system 430, and a light collection system 440. The light collection system 440 includes a homogenizing rod 441 and a concave lens 442.

[0071] versus Figure 5a Compared with the light-emitting device of the illustrated embodiment, the light-emitting device in this embodiment is different in:

[0072] (1) The reflective focusing system 430 in this embodiment is a focusing lens 431 and a reflective element 432. Figure 8 for Figure 7a The right view of the focusing lens 431 in the illustrated embodiment, such as Figure 8 As shown, the focusing lens 431 is specifically a convex lens including a hollowed-out area 431b, the hollowed-out area of ​​the focusing lens 431 is a non-c...

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Abstract

The embodiment of the invention discloses a light emitting device and a projection system. The light emitting device comprises a laser array light source, a light reflecting and condensing system and a light collecting system. The laser array light source comprises a non-light-emitting region and a light-emitting region which is composed of a plurality of laser elements. The light reflecting and condensing system comprises a condensing region and a non-condensing region, and the condensing region is used for focusing and reflecting emergent light of the laser array light source. The light collecting system is used for collecting and emitting the emergent light of the light reflecting and condensing system. The light collecting system, the non-light-emitting region and the non-condensing region are disposed on the same straight line in parallel with the optical axis of the emergent light of the laser array light source, and the light collecting system passes through the non-light-emitting region and/or the non-condensing region. The embodiment of the invention provides the light emitting device which has a small size and emits light with high brightness and uniform spots and the projection system.

Description

technical field [0001] The invention relates to the technical field of illumination and display, in particular to a light emitting device and a projection system. Background technique [0002] With the high-definition and large-scale display devices such as TVs, the brightness requirements for light sources are getting higher and higher, especially in special applications such as theater projections, the brightness requirements for light sources often reach more than 10,000 lumens. [0003] In order to achieve high brightness of the light source, most of the existing technical solutions use light-emitting elements to form an array light source, and then compress the light beam emitted by the array light source to increase the brightness. For example, figure 1 It is a light-emitting device in the prior art, such as figure 1 As shown, the light emitting device includes a laser array light source 110 , a collimator lens array 120 , a condenser lens 130 , a uniform light rod 1...

Claims

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Application Information

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IPC IPC(8): G03B21/20G03B21/00F21V13/00G02B27/09
Inventor 胡飞侯海雄
Owner APPOTRONICS CORP LTD
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