Large-screen projection system

A technology of projection system and large screen, applied in the parts of TV system, TV, color TV, etc., can solve the problems such as application limitation of laser TV splicing wall, reduce laser speckle effect, good picture display effect, reduce effect of noise

Inactive Publication Date: 2011-08-17
PHOEBUS VISION OPTO ELECTRONICS TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If you want to make full use of the light source, you will limit the number and combination of the sub-screens of the video wall, which limits the application of the laser TV video wall to a certain extent.

Method used

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Experimental program
Comparison scheme
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Embodiment 1

[0038] After the above description of the structure of the spectroscopic device, the projection system using the above spectroscopic device will be described below.

[0039] image 3 A schematic structural diagram of a projection system in an embodiment is given, the projection system includes a light source 301, a first spectroscopic device 3021, a second spectroscopic device 3022, a third spectroscopic device 3023, an optical engine module 303, a projection module 304 and a screen module 305. Wherein, the splitting ratio of the spectroscopic mirrors in the spectroscopic device is 1:1; the light source 301 includes ten red, green, and blue solid-state lasers (not shown in the figure), and the red lasers emitted by these lasers , green, and blue light are mixed into a beam of white light according to the power ratio, and this beam of white light is transmitted to the first beam splitting device 3021 through an optical fiber; the white laser beam incident on the first beam spl...

Embodiment 2

[0044] Figure 6 A schematic structural diagram of a projection system in another embodiment is given, and the projection system includes a light source 401 , a light splitting module, an optical engine module 404 , a projection module 405 and a screen module 406 . Wherein, the light splitting module includes a first light splitting module 4021 , a second light splitting module 4022 , a third light splitting module 4023 and a shaping coupling unit 403 . The light source 401 includes five red, green, and blue solid-state lasers each (not shown in the figure), and the power ratio of the red, green, and blue lasers is performed according to the white balance principle of the output light field, but the output end of the light source 401 does not adjust the red, green , blue laser light mixing. The red, green and blue monochromatic beams are respectively transmitted through the optical fiber and then incident on the three beam splitting devices in the first beam splitting module ...

Embodiment 3

[0048] In Embodiment 1 and Embodiment 2, the projection system implements the projection process according to the principle of combining light first and then splitting light, and the principle of first splitting light and then combining light and then splitting light, but in this embodiment, the above two principles can also be combined. Combined to get a new projection system. exist Figure 8 A schematic structural diagram of the spectroscopic module of the projection system in this embodiment is given in . The splitter module is in Figure 6 After the shaping and coupling unit 403 of the projection system shown, a fourth light splitting module 804 is added, and the subsequent corresponding components are adaptively adjusted to an optical machine module 805, a projection module 806, and a screen module 807. Split the light again to obtain 8 white photon beams. In the projection system of this embodiment, 13 spectroscopic devices are needed to obtain 8 white photon beams. C...

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PUM

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Abstract

The invention discloses a large-screen projection system, comprising a laser light source, a light splitting module, a light machine module, a projection module and a screen module, wherein after a light beam emitted by the laser light source is projected to the light splitting module, the received light beam is split by the light splitting module; at least N paths of sub light beams are obtained after the light beam is split; each path of sub light beam is projected into the light machine module; these sub light beams are modulated by the light machine module; each path of signal light obtained after modulation is projected to the screen module via the projection module to form an image. Because the light path of the large-screen projection system can be randomly divided into a plurality of light paths, a number and a splicing mode of sub screens of a spliced wall are not limited.

Description

technical field [0001] The invention relates to the display field, in particular to a large-screen splicing wall projection system using laser light as a light source. Background technique [0002] Large-screen projection systems are widely used in crowded areas such as shopping malls, squares, and large conference rooms. TV splicing wall is a typical large-screen projection system. Most of the TV splicing walls currently on the market use 60-inch DLP rear-projection TVs as the splicing unit, and each splicing unit has an ultra-high pressure mercury lamp of about 120 watts as the light source. Because the ultra-high pressure mercury lamp is prone to damage, the splicing unit cannot work normally, so this type of TV splicing wall often has incomplete projected images. In addition, due to the large heat dissipation of the ultra-high pressure mercury lamp, a special cooling fan is required to dissipate heat, and the fan will generate noise. Therefore, for a TV splicing wall w...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G03B21/20H04N5/74G02B27/10
Inventor 郑光王延伟房涛成华闵海涛毕勇
Owner PHOEBUS VISION OPTO ELECTRONICS TECH
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