Panasonic Corporation

Panasonic Intellectual Property Management Co., Ltd.

Panasonic Electric Works Co., Ltd.

Atsuyuki Yamamoto

Ryo Kawamura

Hiroshi Hoshino

Masanori Kashiwagi

A light projection device capable of irradiating light only onto an object includes: a light projector in which an object and a back surface of the object are taken as a projectable range; a shadow region detector that detects a shadow that occurs on the back surface of the object by projection light; and a controller that corrects a shadow region so that a projection region of the light projector and the shadow region can coincide with each other on the back surface of the object, sets the corrected shadow region as a light projection range and sets, as a non-light projection range, a region other than the shadow region, and sets projection light projected onto the set light projection range, wherein the light projector projects the projection light onto a range where the object is present by projecting the set projection light onto the set light projection range.

Light projection device

An image display apparatus includes a projector receiving an image signal and projecting image light and a screen including a projection plane of arbitrary shape. The projector and screen are connected with link mechanisms and link mechanisms. The relative position and posture between the projector and the screen are automatically or manually changeable. The relative position and posture between the projector and the screen are measured, and correction parameters for correcting distortion of image light projected from the projector onto the screen are calculated from the previously set viewing position of the viewer and the shape of the projection plane of the projector. Based on the calculated correction parameters, the image signal inputted into the projector is subjected to distortion correction processing. It is therefore possible to allow the viewer to see a clear image even if the position of the screen is changed.

Image display apparatus and image distortion correction method of the same

A virtual reality creating system including: a screenincluding a projection plane of arbitrary shape; a distortion correction unitwhich performs distortion correction for projecting image light onto the projection plane of arbitrary shape for a two-dimensional image signal to project image light onto a two-dimensional projection plane and then outputs the same; a parameter adjusting PCwhich creates a distortion correction table as a correspondence map between the two-dimensional projection plane and a mesh model of the projection plane of arbitrary shape; and projectorsandunit which project an image based on the image signal outputted from the image signal processing apparatus onto the screen. The distortion correction unitreceives the distortion correction table from the parameter adjusting PCand performs distortion correction processing for each pixel of the two-dimensional image signal received by the image signal input unit with reference to the distortion correction table to generate the image signal to project the image light onto the projection plane of arbitrary shape. It is therefore possible to display images with reduced distortion of image light viewed by a viewer with a simple structure in real time.

Image signal processing apparatus and virtual reality creating system

An image display device of the present invention comprises projectors, a reflecting mirror, a screen, an image signal processor which performs a distortion correction, and a base for supporting the projectors, the reflecting mirror, and the screen. The projectors, reflecting mirror, and screen are assembled in one to constitute a single moving unit, and the image display device further comprises a lifting device capable of moving the moving unit in a vertical direction with respect to the base.

Growing community of inventors

Sakai, Japan

Atsuyuki Yamamoto