Nec Corporation

Nec Platforms, Ltd.

Nec C Orporation

Hirofumi Tsuda

Satoshi Kyosuna

Fujio Okumura

Satoshi Komatsu

A projection device comprises: a spatial light modulator having a display unit whereon a pattern corresponding to a display image is presented; a light source arranged to irradiate the display unit with emission light; a projection optical system arranged on the optical path of the reflected light of the emission light incident on the display unit and projecting projection light with the high order component included in the reflected light removed therefrom; and a projection control unit that causes the display unit to present a composite image that combines an image formed by a virtual lens that focuses the emission light incident on the display unit at a first focus position with the pattern corresponding to the display image, and controls the light source so that the display unit is irradiated with the emission light.

Projection device, interface device, and projection method

In order to enable any user to perform an input operation intuitively and safely in a situation where input operation is required, the control device detects an subject entering a projection range based on the characteristics of subjects included in image data generated by controlling an imaging device, controls a projection device to project projection light on a projection surface so that display information for receiving input is displayed over the projection surface, detects when a pointing body has entered the area above the projection surface based on the image data, identifies the content of an instruction based on the positional relation between the display information displayed over the projection surface and the instructing portion of the pointing body, controls a communication device to transmit the identified instruction content as input information, and controls the projection device not to project the projection light on a projection-prohibited surface.

Information input device and information input method

A projection device is provided with at least: a laser light source which emits laser light; a conversion unit which converts the laser light into parallel light; a phase-modulation-type spatial modulation element which phase-modulates the parallel light on the basis of a supplied projection image and delivers phase-modulated light; and a control unit. The control unit includes: a projection image storage unit in which at least one projection image group is stored; a processing unit which, with respect to one projection image acquired from the projection image storage unit in synchronism with an update period, generates a combination of a plurality of diffraction patterns in the update period; and a projection image generation unit which supplies the combination of a plurality of diffraction patterns to the phase-modulation-type spatial modulation element as the supplied projection image.

Projection device, projection image control method, and recording medium having projection image control program recorded thereon

In order to make a ghost image appearing when projection light is projected using a phase-modulating spatial light modulation element difficult to visually recognize, a projection device includes a light source, a light-source driving means, a spatial light modulation element, a modulation element control means, a projection control means, and a projection optical system, wherein the projection control means controls the light-source driving means and the modulation element control means in such a way as to cause a phase distribution of an image including a ghost compensation image and a desired image to be displayed on a display part, the ghost compensation image being an image for which high brightness is set totally and in which a display information portion to be displayed on a projection surface is bright while a ghost image portion that appears in association with the display information is dark.

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Tokyo, Japan

Hirofumi Tsuda