Mini-type LCOS projection optical engine
A technology of projection optics and engine, applied in the field of optical imaging, can solve the problems of complex structure, large volume, high cost of LCOS optical engine, etc., and achieve the effect of small volume, high utilization rate of light energy and simple structure
Inactive Publication Date: 2014-12-24
UNIV OF SHANGHAI FOR SCI & TECH
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Problems solved by technology
The LCOS optical engine system generally includes a light source, a display chip and an imaging system. The traditional LCOS optical engine system uses a compound eye array to complete the spatial conversion of light from uneven distribution to uniform distribution on the lighting panel. However, when the compound eye array achieves uniform illumination, two A compound eye array with optical axes parallel to each other needs to place a condenser lens behind the second compound eye array, which has a complex structure and a large volume, resulting in a high cost of the LCOS optical engine
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[0020] The specific implementation manners of the present invention will be described below in conjunction with the accompanying drawings.
[0021] In this embodiment, a white light LED, a wedge-shaped light guide plate, a PBS prism, and a color filter type LCOS chip are used to systematically illustrate the miniature LCOS projection optical engine of the present invention, but the scope of this embodiment does not limit the scope of the present invention.
[0022] figure 1 It is a structural schematic diagram of the micro LCOS projection optical engine of this embodiment.
[0023] Such as figure 1 As shown, the micro LCOS projection optical engine 100 includes a light emission unit 1, an imaging unit 2, a projection unit 3 and a screen 4, the light emission unit 1 includes a light source 11, a light guide plate 12 and an ultraviolet absorption assembly 13, and the imaging unit 2 includes a PBS prism 21 , the LCOS chip 22 and the polarizer 23 located between the PBS prism 21...
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The invention provides a mini-type LCOS projection optical engine. The mini-type LCOS projection optical engine comprises a light emission unit, an imaging unit and a projection unit, and the imaging unit and the projection unit are arranged in the spreading direction of light rays. According to the mini-type LCOS projection optical engine, as the light emission unit comprises a light source used for emitting light rays and a light guide board used for converting a point light source emitted by the light source into an area light source, the light source is formed by arranging a plurality of low-power white light LEDs in a lattice array mode, the light guide board comprises a light guide face, a reflection face and a light outlet face with a 3D texture structure, and light rays can be emitted out evenly only through one light guide board, the mini-type LCOS projection optical engine is simple in structure, small in size and high in light energy utilization rate, and the cost is accordingly lowered.
Description
technical field [0001] The invention belongs to the field of optical imaging, in particular to a miniature LCOS projection optical engine. Background technique [0002] Projection display technology refers to the method of using optical system and projection space to enlarge the image and display it on the projection screen. With the popularity of smart phones and wearable devices, there are more requirements for displays in different scenarios. Among them, the miniaturized projector is very suitable for integration on such devices due to its small size, light weight and ability to meet the basic functions of projection, which expands the scope of use of the projector and has broad market prospects. [0003] As one of the basic micro-projection technologies, LCOS optical engine has the characteristics of low price and excellent projection performance compared with other technologies, and it is the most likely commercialized micro-projection technology. The LCOS optical eng...
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IPC IPC(8): G03B21/20F21V8/00G02B6/00
Inventor 邹兵许健
Owner UNIV OF SHANGHAI FOR SCI & TECH