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Projection device

A technology of projection device and projector, which is applied in the field of projection engineering, can solve problems such as cumbersome process, deformation of the hanger, and accidentally touching the projector.

Pending Publication Date: 2021-07-20
QINGDAO HISENSE LASER DISPLAY CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The most common problems in projection fusion large-screen display are: 1. The correction of the overlapping part of the image, that is, the fusion zone: due to its strong professionalism, it usually requires manual operation by professionals, and the process is cumbersome and inefficient; 2. Restoration after misalignment: During the corrected use, the hanger of the suspended projector may be slightly deformed by gravity or the projector may be accidentally touched, which will displace the overlapping pixels on the fusion belt and cause the image to be blurred; the user needs to Find professionals to go to the site for debugging, so not only will there be additional maintenance costs, but it will also be difficult to solve the fault in the first place, which will affect the exhibition display

Method used

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Experimental program
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Effect test

Embodiment 1

[0029] As mentioned above, when the correction control module 5 calls the correction module 4 to correct the four sets of marker pairs respectively, and realize the coincidence of the four corner pixels of the fusion zone 2, the boundary of the fusion zone has been determined, basically realizing the automatic correction or dislocation of the fusion zone Restoration, sometimes in the inner area of ​​the fusion zone, there are still slight deviations in pixels, in this embodiment, such as Figure 5 As shown, the fine adjustment module 6 is used to realize fine correction or misalignment restoration of the pixels inside the fusion zone.

[0030] Specifically, the fine-tuning module 6 is used to continue to control the marking module 3 to mark several groups of marking pairs inside the fusion band after the correction control module 5 calls the correction module 4 to correct the four groups of marking pairs, such as Figure 6 and Figure 7 As shown, the marker pairs of M rows an...

Embodiment 2

[0033] In this embodiment, a specific calibration method of the calibration module 4 is illustrated.

[0034] Such as Figure 8 As shown, the correction module 4 includes a moving unit 41 and a rotating unit 42, the moving unit 41 is used to move the first projected image 11 and / or the second projected image 12, so that the center point of the first mark 111 is consistent with the second mark 121 center points coincide.

[0035] Such as Figure 9 As shown, taking the first mark as the first horizontal line mark 111 and the second mark as the second horizontal line mark 121 as an example (both are represented by cross marks containing horizontal lines in the figure), the first horizontal line mark 111 and the second horizontal line mark The line L connecting the center points of the two horizontal line marks 121 forms a first angle a with the body of the first horizontal line mark, and the line L connecting the center points of the first horizontal line mark 111 and the secon...

Embodiment 3

[0042] In this embodiment, the calibration module 4 includes a moving unit 41 for moving the first projected image 11 and / or the second projected image 12 so that the center point of the first mark 111 coincides with the center point of the second mark 121 .

[0043] In this example, if Figure 4 As shown, taking the first mark as the first circular mark 111 and the second mark as the second circular mark 121 as an example, the purpose of the correction is to realize the complete overlap of the two circular marks, therefore, the two circular marks can be Move, or one circle moves relative to another circle, and the moving direction is the direction of the connecting line between the centers of the two circles.

[0044] The pixel distance between the farthest ends of the first circular mark 111 and the second circular mark 121 is L, and the pixel distance of the circular diameter is S, then when the two circular marks move relative to each other along the line connecting the ce...

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Abstract

The invention discloses a projection device, and the projection device comprises a plurality of projectors arranged according to a set array, and a fusion zone is formed between two projection images projected by two adjacent projectors; the marking module marks a first mark in the fusion band area of the first projection image and marks a second mark in the fusion band area of the second projection image to form a group of mark pairs; the correction module moves and / or rotates the first projection image and / or the second projection image to enable the first mark to coincide with the second mark; the correction control module controls the marking module to respectively mark first marks at four corner positions of a fusion band area of the first projection image and respectively mark second marks at four corner positions of a fusion band area of the second projection image so as to form four groups of mark pairs at the four corner positions of the fusion band, and calls the correction module to respectively correct the four groups of mark pairs, so that pixels at four corners of the fusion band are overlapped, and automatic correction of the boundary of the fusion band of the two projection images is realized.

Description

technical field [0001] The invention relates to the technical field of projection engineering, in particular to a projection device. Background technique [0002] At present, in the field of large-screen image display, there are mainly three display technologies such as DLP (Digital Light Processing, digital light processing) rear projection splicing, small-pitch LED screen splicing, and projection fusion splicing; Seams, low radiation, eye protection and other advantages are favored by the market. [0003] The mainstream implementation method of projection fusion stitching in the industry is: arrange multiple projectors in an array according to requirements, so that there is about 20% overlap between each projected image (called the fusion zone), such as figure 1 As shown, the overlapping portion 2 is formed between the projected image 11 projected by the first projector 1 and the projected image 12 projected by the second projector 2, and then the image processing functio...

Claims

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Application Information

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IPC IPC(8): H04N9/31
CPCH04N9/3147H04N9/3185
Inventor 李泽广吴超
Owner QINGDAO HISENSE LASER DISPLAY CO LTD