PROJECTION PICTURE CORRECTION METHOD, PROJECTION DISPLAY SYSTEM AND RELATED DEVICE

WIPO Patent Application WO/2022/017262

A1

Provided is a projection picture correction method. The method comprises: a projection terminal projecting a scanning line onto a screen, and sending projection picture coordinate information of the scanning line on a projection picture to the screen; the screen controlling at least four photoelectric sensors to perform brightness measurement; when each photoelectric sensor is illuminated by the scanning line, the screen performing parsing to obtain projection picture coordinate information of each photoelectric sensor; the screen performing calculation according to screen coordinate information and the projection picture coordinate information of each photoelectric sensor, so as to obtain corresponding coordinate information of each photoelectric sensor, and sending same to the projection terminal; and the projection terminal calculating a transformation matrix between the current projection picture and the screen according to the corresponding coordinate information, and taking the transformation matrix as an input parameter for projection picture correction, so as to realize the adaptation of a boundary of the projection picture to a boundary of the screen. Compared with the related art, the projection picture correction method of the present invention has a simple operation, a simple computation process, and a high efficiency of the automatic correction of a projection picture.

CHEN BAOLIN (CN)
LI YI (CN)

PCT/CN2021/106673

January 27, 2022

July 16, 2021

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APPOTRONICS CORP LTD (CN)

H04N9/31

CN101651808A	2010-02-17
CN109194939A	2019-01-11
CN104869336A	2015-08-26
CN1701603A	2005-11-23
CN101500172A	2009-08-05
JP2017121076A	2017-07-06

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