US 11,950,027 B2
Interactive projection system and operation method thereof
Ching-Feng Hsieh, Hsin-Chu (TW)
Assigned to Coretronic Corporation, Hsin-Chu (TW)
Filed by Coretronic Corporation, Hsin-Chu (TW)
Filed on Mar. 23, 2023, as Appl. No. 18/189,180.
Claims priority of application No. 202220672123.X (CN), filed on Mar. 24, 2022.
Prior Publication US 2023/0308618 A1, Sep. 28, 2023
Int. Cl. G06F 3/042 (2006.01); H04N 9/31 (2006.01)
CPC H04N 9/3173 (2013.01) [G06F 3/0421 (2013.01); H04N 9/312 (2013.01); H04N 9/3185 (2013.01)] 13 Claims
OG exemplary drawing
 
1. An interactive projection system, comprising a projector and a touch interactive light source device, wherein:
the projector comprises a projection optical engine, a camera module, and a control module, the projection optical engine is configured to emit a projection beam toward a projection surface to form a projection range on the projection surface;
the touch interactive light source device comprises at least one infrared light source module and a wireless signal transmission module, wherein the at least one infrared light source module is configured to generate an infrared light curtain parallel to the projection surface, and is electrically connected to the wireless signal transmission module; and
the control module is electrically connected to the projection optical engine and the camera module, and controls the touch interactive light source device through the wireless signal transmission module, so that the touch interactive light source device is placed in a recommended installation position and the interactive projection system is in an interactive mode,
wherein when an object approaches the projection surface and contacts the infrared light curtain, the control module receives an infrared light beam reflected by the object through the camera module, and identifies a position of the object or a touch position of the object corresponding to the projection range according to the infrared light beam.
 
7. An operation method of an interactive projection system, wherein the interactive projection system comprises a projector and a touch interactive light source device, the projector comprises a projection optical engine, a camera module, and a control module, and the operation method comprises:
emitting, by the projection optical engine of the projector, a projection beam toward a projection surface to form a projection range on the projection surface;
receiving, by the projection optical engine, an instruction signal from the control module of the projector to generate an instruction image on the projection surface, wherein the instruction image comprises a plurality of recommended installation positions, a start instruction, touch calibration, and a warning signal;
generating, by the projection optical engine, the recommended installation positions and the start instruction in the instruction image on the projection surface, and connecting the touch interactive light source device, through a wireless signal transmission module of the touch interactive light source device, with the control module of the projector after the touch interactive light source device is placed in one of the recommended installation positions and the touch interactive light source device is activated; and
controlling, by the control module, the touch interactive light source device through the wireless signal transmission module, so that the interactive projection system is in an interactive mode.