US 2006/0187422 A1 · Image display apparatus, image display method, and recording medium

Abstract

In a projector, CPU supplies a chart generation circuit with chart display information designating display position and display size of a chart image to be projected on a screen such that it comes within viewable ranges of phase difference sensors. For focus control, CPU sets display position near center of the screen, and designates display size regardless of distance between the projector and screen. For keystone correction, CPU designates display position and display size based on relationship among angular field of view, distance, and viewable ranges of the phase difference sensors. A superimposing circuit generates a video by superimposing a video signal with a chart image signal based on the chart display information. A display device projects the video superimposed by the superimposing circuit on the screen. CPU obtains the distance to the screen based on phase difference between reflection lights obtained by a sensor unit and corrects the video.

Claims13

Dependent claims

An image display apparatus for projecting a video on a projection plane, comprising:

a chart image signal generation unit which is supplied with chart display information designating a display position and a display size, on the projection plane, of a chart image for measuring a distance to the projection plane, and generates a chart image signal in which the display position and the display size of the chart image are set based on the supplied chart display information;
a projection unit which converts the chart image signal generated by the chart image signal generation unit into a projection light to project the chart image on the projection plane based on the display position and the display size designated by the chart display information supplied to the chart image signal generation unit;
a sensor unit which receives a light from the chart image projected on the projection plane, and obtains sensor data regarding the distance to the projection plane based on an image imaged on an imaging surface thereof;
and
a chart display information supply unit which determines a viewable range of the sensor unit, sets the display position and the display size of the chart image on the projection plane based on the determined viewable range of the sensor unit, and supplies the chart display information designating the set display position and display size to the chart image signal generation unit.

2 more elements

Dependencies are inferred from the claim text.

Image display apparatus, image display method, and recording medium

Life of this patent

Image display apparatus, image display method, and recording medium

Life of this patent

Abstract

Claims13