Projection screen, image synthesizing device, projection system and related methods
AssigneeBoe Technology Group Co., Ltd.
InventorYongbo WANG
Life of this patent
Estimating the term…
Abstract
A projection screen, an image synthesis apparatus, a projection system and a related method are disclosed. The projection screen comprises a curtain, and further comprises a photosensitive element, wherein the photosensitive element is arranged on the curtain and is used for generating a position sensing signal; and a signal processing circuit, wherein the signal processing circuit is used for determining relative position coordinates, in a projection area, of an indication point and outputting same, wherein the projection area is an area, on the projection screen, for receiving illumination of an optical projection device, and the indication point is a projection point, on the projection screen, of an optical indication device.
Claims20
A projection screen, comprising:
- a screen curtain;
- photosensitive elements, positioned on the screen curtain and configured to generate position sensing signals;
- and
- a signal processing circuit, electrically connected with the photosensitive elements and configured to determine and output a relative position coordinate of an indication point in a projection area;
- wherein the projection area is an area, illuminated by a light projection device, on the projection screen;
- and the indication point is a projection point of a light indication device on the projection screen.
An image synthesizing device, comprising:
- a coordinate acquisition circuit configured to acquire a relative position coordinate, in a demonstration image area, of an indication point for indication in the demonstration image area;
- a coordinate mapping circuit configured to map the relative position coordinate of the indication point in the demonstration image area to a mark pattern coordinate in a demonstration image projected in the demonstration image area;
- and
- a synthesizing circuit configured to generate a mark pattern at a mapped coordinate in the demonstration image.
A projection method, comprising:
- determining an area, illuminated by a light projection device, on a projection screen as a projection area;
- determining a projection point position of a light indication device on the projection screen as an absolute position of an indication point on the projection screen;
- determining a relative position coordinate of the indication point in the projection area;
- outputting the relative position coordinate;
- acquiring a position coordinate, in a demonstration image area, of the indication point for indication in the demonstration image area;
- mapping the position coordinate of the indication point in the demonstration image area to a mark pattern coordinate in a demonstration image projected in the demonstration image area;
- and
- generating a mark pattern at a mapped coordinate in the demonstration image.
Dependencies are inferred from the claim text.