Projection Type Video Display Apparatus
AssigneeFunai Electric Co., Ltd.
InventorShinichi HIRAI
Life of this patent
Estimating the term…
Abstract
Disclosed is a projection type video display apparatus including: a video projection section to generate projection light of a video to output through a projection lens; an imaging section to capture through a camera lens the video projected by the video projection section; a moving section to move the projection lens in a direction of changing focus of the video; and a control section to adjust the focus of the projected video, wherein the control section allows the video projection section to project a pre-set mark image and the imaging section to capture the projected video of the mark image to allow the moving section to operate so that the captured mark image is in focus, and thus adjusts the focus of the projected video.
Claims7
A projection type video display apparatus comprising:
- a video projection section to generate projection light of a video to output through a projection lens;
- an imaging section to capture through a camera lens the video projected by the video projection section;
- a moving section to move the projection lens in a direction of changing focus of the video;
- and
- a control section to adjust the focus of the projected video, wherein
- the control section allows the video projection section to project a pre-set mark image and the imaging section to capture the projected video of the mark image to allow the moving section to operate so that the captured mark image is in focus, and thus adjusts the focus of the projected video.
A projection type video display apparatus comprising:
- a video projection section to generate projection light of a video to output through a projection lens;
- an imaging section to capture through a camera lens the video projected by the video projection section;
- a storage section to store image data of a mark image in which a bright portion and a dark portion are arranged alternately;
- a video input section to receive input of data or signal of a video;
- an image insertion section to insert a display content of a character or design in the data or signal of the video;
- a moving section to move the projection lens in a direction of changing focus of the video;
- and
- a control section to adjust the focus of the projected video, wherein
- the control section allows the mark image to be inserted in the projected video by the image insertion section while a video input from the video input section is projected by the video projection section and allows the imaging section to capture the projected video of the mark image to determine whether or not the projected video is in focus by comparing areas of the bright portion and the dark portion of the mark image while allowing the moving section to operate, and thus adjusts the focus of the projected video.
Dependencies are inferred from the claim text.