| 摘要 |
A projector device of a rear projection type includes a screen (120) including a display region (121) in which an image is displayed and a calibration region (122) where at least a light reflecting member or a light absorbing member is disposed on a front side of the screen (120), a projector emitting light to the screen (120) from a rear side of the screen, a light receiver sensing light reflected to the rear side, and a user interface detecting a touch operation on the image in the display region (121) based on a signal level of the reflected light. The interface includes a threshold adjuster that adjusts a threshold level for detecting the touch operation based on a signal level of light reflected from the calibration region (122) and an operation detector that detects the touch operation by comparing a signal level of light reflected from the display region (121) with the adjusted threshold level. |
