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US 11,231,790 B2Granted
Projection screen, image synthesizing device, projection system and related methods
AssigneeBoe Technology Group Co., Ltd.
InventorYongbo Wang
Life of this patent
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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.
Claims18
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;
- wherein the signal processing circuit comprises an indication point identification circuit;
- and
- the indication point identification circuit is configured to identify a change of electrical signals output by the photosensitive elements and identify a position of at least one of the photosensitive elements on the projection screen with a light intensity value greater than a preset light intensity value as an absolute position of the indication point on the projection screen.
6 more elements
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;
- wherein the coordinate mapping circuit is configured to:
- determine, according to a proportion of a distance between a position where the indication point is located and a left side edge of a projection area to a distance between the left side edge and a right side edge of the projection area, an area in the demonstration image of which a proportion of a distance between the area and the left side edge of the demonstration image to the distance between the left side edge and the right side edge of the demonstration image is same;
- and
- determine, according to a proportion of a distance between the position where the indication point is located and an upper side edge of the projection area to a distance between the upper side edge and a lower side edge of the projection area, an area in the demonstration image of which a proportion of a distance between the area and the upper side edge of the demonstration image to the distance between the upper side edge and the lower side edge of the demonstration image is same;
- wherein a coordinate of a coincident position of the two areas is a position coordinate of the indication point in the demonstration image after mapping.
6 more elements
A projection screen, comprising:
- one or more processors;
- a memory;
- and
- one or more application programs, wherein the one or more application programs are stored in the memory and configured to be executed by the one or more processors, and the one or more programs are configured to:
- determine an area, illuminated by a light projection device, on the projection screen as a projection area;
- determine 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;
- determine a relative position coordinate of the indication point in the projection area;
- and
- output the relative position coordinate;
- wherein the one or more programs are further configured to:
- identify a change of electrical signals output by the photosensitive elements and identify a position of at least one of the photosensitive elements on the projection screen with a light intensity value greater than a preset light intensity value as an absolute position of the indication point on the projection screen.
8 more elements
An image synthesizing device, comprising:
- one or more processors;
- a memory;
- and
- one or more application programs, wherein the one or more application programs are stored in the memory and configured to be executed by the one or more processors, and the one or more programs are configured to:
- acquire a position coordinate, in a demonstration image area, of an indication point for indication in the demonstration image area;
- map 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
- generate the mark pattern at the mapped coordinate in the demonstration image;
- wherein the coordinate mapping circuit is configured to:
- determine, according to a proportion of a distance between a position where the indication point is located and a left side edge of a projection area to a distance between the left side edge and a right side edge of the projection area, an area in the demonstration image of which a proportion of a distance between the area and the left side edge of the demonstration image to the distance between the left side edge and the right side edge of the demonstration image is same;
- and
- determine, according to a proportion of a distance between the position where the indication point is located and an upper side edge of the projection area to a distance between the upper side edge and a lower side edge of the projection area, an area in the demonstration image of which a proportion of a distance between the area and the upper side edge of the demonstration image to the distance between the upper side edge and the lower side edge of the demonstration image is same;
- wherein a coordinate of a coincident position of the two areas is a position coordinate of the indication point in the demonstration image after mapping.
10 more elements
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;
- wherein the absolute position of the indication point on the projection screen is a position of at least one of the photosensitive elements on the projection screen with a light intensity value greater than a preset light intensity value;
- 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.
6 more elements
Dependencies are inferred from the claim text.