Projection-type image display device

The invention provides a projection-type image display device. A to-be-projected object which takes a desktop as the principle body is projected by the device, the device displays an image, and a display frame reflecting position and gesture motion of a user is displayed in a specified area. An illumination device and a camera are arranged in the projection-type image display device arranged on adesktop and are used for detecting gestures made by fingers of the user, and for example, a menu image and operation instructions are displayed corresponding to gestures. The camera shoots shadows ofthe fingers to detect the gestures. The display frame follows the gestures to be correspondingly moved, rotated, divided, zoomed in and zoomed out, or the menu image is displayed corresponding to thegestures. Directions of desk edges are considered to decide display directions. 本发明提供种投影型影像显示装置，对以桌面为主的投射物投射并显示图像，在规定的区域显示反映了用户的位置和手势动作的显示画面。在设置在桌面上的投影型影像显示装置中设置照明和摄像机，检测用户用手指做出的手势，与手势相应地例如显示菜单画面、操作指南。摄像机拍摄手指的阴影来检测手势。与手势相应地移动、旋