PROJECTION TYPE DISPLAY DEVICE

摘要

PROBLEM TO BE SOLVED: To provide a concrete means to increase the efficiency of a focus adjustment operation in a portable projection type display device by easily displaying a video suitable for the focus adjustment in the focus adjustment. SOLUTION: A sensor detection object 15 that moves interlocking with the focus adjustment operation of a focus adjustment means formed in a lens barrel 12 is provided. A sensor 11 detects that the focus adjustment operation is carried out by detecting the movement of the object 15. The video for focus adjustment is automatically projected on the basis of a detection signal from the sensor 11. The projection of the video for focus adjustment is automatically carried out only by operating the focus adjustment means in the focus adjustment.