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Seamless splicing method of back projection unit and special optical structure

An optical structure, seamless splicing technology, applied in optics, instruments, projection devices, etc., can solve problems such as image segmentation, and achieve the effect of simple structure, favorable for popularization and application, and less cost increase

Inactive Publication Date: 2011-04-06
GUANGDONG VTRON TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Because no light reaches the splicing gap 12, a dark line is formed at the splicing gap 12, resulting in image segmentation

Method used

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  • Seamless splicing method of back projection unit and special optical structure
  • Seamless splicing method of back projection unit and special optical structure
  • Seamless splicing method of back projection unit and special optical structure

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] The optical structure used in this embodiment is as image 3 As shown, the overall splicing structure is as Figure 7 As shown, the entire splicing display system is mainly composed of multiple rear projection units 11 spliced ​​with each other, and there is a splicing gap 12 between two adjacent rear projection units. Each rear projection unit 11 is composed of a projector 21 and a screen system 22 arranged in sequence according to the optical path. The screen system 22 is mainly composed of a fixed bracket 23 , a Fresnel lens 31 and a rear projection screen 25 arranged in sequence according to the optical path. Groove 32 is made on the Fresnel lens 31, and the surface of groove 32 can be smooth surface, also can be frosted surface, and the opening of groove 32 points to outside, and groove is close to the inclined surface of screen and the front of Fresnel lens. The included angle is greater than the angle corresponding to the edge light of the image displayed on th...

Embodiment 2

[0033] The optical structure used in this embodiment is as Figure 4 As shown, the overall splicing structure is as Figure 8 As shown, the entire splicing display system is mainly composed of multiple rear projection units 11 spliced ​​with each other, and there is a splicing gap 12 between two adjacent rear projection units. Each rear projection unit 11 is composed of a projector 21 and a screen system 22 arranged in sequence according to the optical path. The screen system 22 is mainly composed of a fixed bracket 23 , a Fresnel lens 41 , a glass plate 42 and a rear projection screen 25 arranged in sequence according to the optical path, wherein the glass plate 42 is installed between the Fresnel lens 41 and the fixed bracket 23 . A cut corner 43 and a cut corner 44 are respectively provided on the edges of the surface of the Fresnel lens 41 in contact with the glass plate 42 , and the two cut corners constitute the optical structure of this embodiment. The included angle ...

Embodiment 3

[0036] The optical structure used in this embodiment is as Figure 5 As shown, the overall splicing structure is as Figure 9 As shown, the entire splicing display system is mainly composed of multiple rear projection units 11 spliced ​​with each other, and there is a splicing gap 12 between two adjacent rear projection units. Each rear projection unit 11 is composed of a projector 21 and a screen system 22 arranged in sequence according to the optical path. The screen system 22 is mainly composed of a fixed bracket 23 , a Fresnel lens 24 and a rear projection screen 25 arranged in sequence according to the optical path. A scattering layer 51 or a light-transmitting microstructure layer 52 is formed on the side of the Fresnel lens 24 . The scope of the light 26 projected by the projector 21 in this embodiment is expanded relative to the prior art, and slightly exceeds the scope of the display image on the rear projection screen 25, and the excess light is projected onto the ...

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Abstract

The invention provides a seamless splicing method of a back projection unit. Minute splicing apertures are arranged among each two back projection units; each of the back projection unit is formed by arranging a projection machine and a screen system according to light path in sequence, wherein, the screen system comprises a fixed bracket, a Fresnel lens and a back projection screen. The inventionis characterized in that the range of light ray which is projected by the projector is slightly larger than the range of the display image of the back projection screen; the exceeded light ray is projected at the side face of the screen system; and an optical structure is used at the side face of the screen system to guide the light ray projected at the side face of the screen system to be emitted at the splicing apertures. The invention uses the optical structure which is arranged at the side face of the screen to guide projection edge light beam to the splicing apertures so as to emit towards the front face of the screen, therefore, dark lines at the splicing apertures are blanked, so as to achieve the effect of effectively blanking the image splicing apertures and actually realize theintact display of the image.

Description

technical field [0001] The invention relates to the field of rear projection unit splicing, in particular to a rear projection unit seamless splicing method and a special optical structure thereof. Background technique [0002] The projection splicing display wall is a special and demanding projection display application, which can splice multi-screen images together to achieve ultra-large screen ultra-high resolution image display. Projection display splicing technology can be divided into the following types: unit splicing, full-screen image splicing and soft-edge fusion splicing, etc. Among them, unit splicing technology has the advantages of mature technology, simple process, and convenient installation, and is widely used. Due to the advancement of technology, the image seam of the existing video wall has been made very small, less than one pixel of the image, and there is almost no loss of image. Even so, there are still obvious stitching seams between adjacent units,...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G03B21/62
Inventor 孟凡华罗振华骆健忠
Owner GUANGDONG VTRON TECH CO LTD
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