Method for correcting a projected image and laser projection device

By identifying and correcting the correction pattern offset parameters of the ultra-short-throw laser projection device during the projection process, the problem of the projected image not matching the screen is solved, achieving imperceptible automatic correction and good display effect.

CN114222099BActive Publication Date: 2026-06-26QINGDAO HISENSE LASER DISPLAY CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
QINGDAO HISENSE LASER DISPLAY CO LTD
Filing Date
2021-12-20
Publication Date
2026-06-26

AI Technical Summary

Technical Problem

When an ultra-short throw laser projection device is moved, the projected image may not match the projection screen, resulting in poor display quality.

Method used

By capturing images of the projection screen during the projection process, identifying the offset parameters of the correction pattern, and automatically correcting the projection position based on these parameters, the projected image is aligned with the screen.

Benefits of technology

It achieves alignment between the projected image and the screen without requiring manual calibration by the user, thus improving the display effect and maintaining continuous playback.

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Abstract

The application discloses a correction method of a projection image and a laser projection device, and relates to the field of projection display. In the process of projecting a first projection image to a projection screen, the laser projection device acquires a shooting image obtained by shooting the projection screen. The laser projection device corrects the projection position of the projection image to be projected based on the offset parameters determined based on the initial positions of a plurality of correction patterns and the target positions of the plurality of correction patterns in the shooting image, thereby avoiding the problem that the projection image does not match the projection screen and ensuring the display effect of the projection image. Moreover, since the method provided in the application automatically corrects the projection image to be projected in the process of projecting the first projection image to the projection screen, the user does not need to manually perform the correction operation, and the normal playing of the display picture is not interrupted. That is, the method provided in the application realizes user-perception-free correction, and the user experience is good.
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Citation Information

Patent Citations

  • Projection image correction method and laser projection equipment

    CN113055663A

  • Method, medium and apparatus correcting projected image

    US20070274588A1