Method and apparatus for automatically correcting projection display of projector
AssigneeDelta Electronics, Inc.
InventorJimmy Su
Life of this patent
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Abstract
A method and apparatus for automatically correcting projection display of a projector. The disposition parameters including disposition distance (or horizontal inclination angle) and vertical inclination angle for the disposing surface are detected first. Whether the disposition distance (or horizontal inclination angle) and the vertical inclination angle are shifted from the predetermined standard values is determined by a control circuit. If the deviation occurs, a correction value according to the deviation is obtained from a look up table, and an input image signal is corrected with the correction value to obtain a corrected image projected on a screen.
Claims14
An apparatus for correcting a projection display of a projector, comprising:
- a detector, to detect a plurality disposition parameters of the projector;
- and
- a control circuit, to receive the disposition parameters and correct an input image signal with a keystone correction value obtained according to a deviation between the disposition parameters and standard reference values of the disposition parameters;
- wherein the detector comprises:
- a disposition distance detector installed in the projector, to detect a disposition distance between the disposition distance detector and a disposition surface for disposing the projector;
- and
- an inclination angle detector installed in the projector, to detect a vertical inclination angle between a line normal to a projection axis of the projector and a line normal to the disposition surface.
An apparatus for correcting a projection display of a projector, comprising:
- a detector, to detect a plurality disposition parameters of the projector;
- and
- a control circuit, to receive the disposition parameters and correct an input image signal with a keystone correction value obtained according to a deviation between the disposition parameters and standard reference values of the disposition parameters;
- wherein the detector comprises an inclination angle detector to detect:
- a horizontal inclination angle between a projection axis of the projection and a disposition surface for disposing the projector;
- and
- a vertical inclination angle between a line normal to the projection axis and a line normal to the disposition surface.
Dependencies are inferred from the claim text.