PROJECTION SCREEN ADJUSTING METHOD AND APPARATUS, AND PROJECTOR, AND STORAGE MEDIUM

WIPO Patent Application WO/2022/062604

A1

Provided are a projection screen adjusting method and apparatus, and a projector, and a storage medium, relating to the field of projectors. The method comprises: obtaining a selected target area (S200); an adjusting step: adjusting a projection focal length of a light engine to change the size of the current projection area of the light engine; correcting an effective projection screen in the current projection area to change the shape of the effective projection screen (S210); and at least executing the adjusting step once to project the effective projection screen to the selected target area (S220). Adjusting the projection focal length of the light engine can ensure that the loss of brightness and image quality can be avoided when zooming the projected screen, and therefore, combining the adjustment mode with the mode of correcting the effective projection screen in the current projection area can achieve fast and efficient adjustment of the projection screen, project the projection screen to the selected target area, and reduce the loss of brightness and image quality of the projection screen.

JP3716265	PROJECTOR ZOOMED STATE DETECTING DEVICE AND PROJECTOR
JP2006524457	Use of electronic paper-based screens to improve contrast
JPS593665	[Title of the device] Television image projection device

RAN PENG (CN)
YU JIN QING (CN)

PCT/CN2021/106993

March 31, 2022

July 19, 2021

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CHENGDU XGIMI TECH CO LTD (CN)

H04N5/74; H04N9/31

CN107509066A	2017-12-22
CN104683724A	2015-06-03
CN110769217A	2020-02-07
CN110336987A	2019-10-15
CN108024101A	2018-05-11
CN107786860A	2018-03-09
US20150181183A1	2015-06-25
JP2018205506A	2018-12-27
CN102799053A	2012-11-28

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