Casio Computer Co., Ltd.

Casio Electronics Manufacturing Co., Ltd.

Nkk Corporation

Casio Electronics Manufac. Co. Ltd.

Casio Computor Co., Ltd.

Hideaki Inoue

Hideki Takahashi

Kenji Nakayama

Tadao Yamamoto

Eiichi Takeuchi

Shigeru Shimizu

Kenichiro Asako

Toshiro Honda

Morio Ohta

Yasuhito Sato

Hideyuki Kurosaki

Keiichi Kobayashi

Hidetoshi Noda

Osamu Komatsu

Makoto Gocho

Masayasu Shimizu

Ken Yoshino

Shizuo Tsuchiya

Toshiharu Arai

Taichi Honjo

Nobuaki Kuwabara

Keiichi C/O Casio Computer Co Ltd Hamura R & D Center 2-1 Kobayashi

Provided is a position detecting device including: a light emission unit configured to emit light in a predetermined wavelength band in a manner substantially parallel to a plane surface; a polarization filter configured to transmit p polarized light of light reflected on the plane surface and to block s polarized light thereof; and an imaging unit configured to perform imaging of the plane surface obliquely from above with the light in the predetermined wavelength band through the polarization filter.

Position detecting device and projector

In a projector, a comparator included in a trapezoid correction unit compares the aspect ratio of a rectangular input unit with that of the device area. A projection area determination unit determines an effective projection area that is an area included in the projection area and that is rectangular on the object on the basis of a result of the comparison. The device area determination unit determines an effective device area so that the relation of the effective projection area with the projection area corresponds to the relation of the effective device area with the device area. A geometric transformation unit projects the input image into the effective device area so that the input image is projected without distortion within the effective projection area of the object.

Projection apparatus for increasing pixel usage of an adjusted projection area, and projection method and program medium for the same

A CPU of a projector determines whether or not a correction mode in which the aspect ratio of an input image is changed to correct distortion is set and, if the correction mode is set, determines distortion correction process parameters for changing the aspect ratio of the image to be projected onto a screen to project the image in the form of a rectangular image, and the image converter performs geometric correction on the input image on the basis of the distortion correction process parameters to project the image subjected to distortion correction.

Projection apparatus, projection method, and projection program medium which corrects image distortion based on pixel usage

A CPU controls an attitude adjustment unit to change the lengths of legs of an electric leg part independently of each other so that a roll angle is changed to roll a projected image, and controls an image converter to correct the projected image to be a rectangular image on a projection target based on the changed roll angle.

Projection apparatus, projection method and projection program medium that determine a roll angle at which the projection apparatus is to be turned to correct a projected image to be a rectangular image on a projection target

The present invention provides an inexpensive range image sensor and etc. A range image sensor comprises diffractive optical elements and on which are formed diffractive gratings that change a traveling direction of incident parallel light so that in a coordinate space defined by a xyz-axis, the incident parallel light is split into split beams, and angles formed by the x-axis and line segments determined by projected light spots formed by the split beams on a predetermined projection plane intersecting the z-axis become predetermined angles. Furthermore, the range image sensor is provided with a distance determining unit for determining distances to the projected light spots on the basis of the tilting with respect to the x-axis of the line segments determined by the projected light spots formed on the object by the split beams.

Range image sensor, range image generating apparatus, range image data obtaining method and range image generating method

A light source device includes: a light emitting plate that has a plurality of segment regions including a transmissive portion that transmits light and a reflective portion on which a fluorescent substance layer; a light source that irradiates the fluorescent substance layer of the light emitting plate with the excitation light; a dichroic mirror that is disposed between the light source and the light emitting plate to transmit the excitation light and reflect fluorescent light from fluorescent substances of the fluorescent substance layer; and an optical device that condenses the excitation light transmitted by the transmissive portion of the light emitting plate and the fluorescent light reflected by the dichroic mirror on a single optical path to form a condensed light and radiate the condensed light toward the same direction.

Light source device and projector

The present invention provides a small diffractive optical element that emits twisted beam, a small distance measuring apparatus and a distance measuring method using a small diffractive optical element. A diffractive optical element includes a first diffractive grating that twists, in a coordinate space defined by an x-axis, a y-axis and a z-axis, parallel light forming a flat plane parallel to the x-axis and going advance in the z-axis direction so that an angle of the flat plane relative to the x-axis becomes a predetermined angle at a location where the parallel light traveling in the z-axis by a predetermined distance reaches.

Diffractive optical element, distance measuring apparatus and distance measuring method

A light source apparatus includes a light source emitting light, an optical deflection element deflecting and exciting the emitted light, and a light conversion member cyclically outputting source light components having a plurality of hues in accordance with irradiation positions in a time-sharing manner based on the irradiation using the light deflected by the optical deflection element.

Light source apparatus, light source control method, and projector apparatus

Disclosed is a projection apparatus including: a video display control sectionto project and display a video according to input video data; and a projection distance obtainment sectionto irradiate to a projection plane where the video is projected with a laser and displayed by the video display control section, and to obtain a projection distance to the projection plane, wherein when the projection distance is obtained by the projection distance obtainment section, the video display control sectionadjusts a display status of at least a first video areacorresponding to a laser ranging pointwhich is an area where the laser is irradiated to a display status for obtaining the projection distance so that the distance from the projection apparatus to the projection plane can be measured fast and with high accuracy.

Projection apparatus and optical ranging method

A projection apparatus including a projection drive control unit modulating an emitted light from a light source unit for each of a plurality of color components at predetermined time, and a projection distance acquisition unit irradiating light to the projection screen to acquire a distance to the projection screen, wherein the projection distance acquisition unit carries out laser distance measurement during a period the projection drive control unit modulates a color component of the emitted light to color components except one color component of a plurality of modulated color components.

Projection apparatus and distance measurement method wherein the distance is acquired during a period of predetermined color components being emitted (As amended)

A light sourceof a projection unitAM modulates an electric current supplied to a built-in LED. The projection unitprojects the modulated light on a projection screen. A photoreceiverreceives, with a time lag, a reflected portion of the modulated light from the screen, which corresponds to a time required for the light to travel from its projection to its reception. A calculation unitacquires a phase difference between the projected light and its reflection at a respective one of a plurality of points on the screen, acquires a distance from the projector to the respective one of the plurality of points on the screen, and then acquires an inclination angle of the screen. Because the distance from the projector to a respective one of the plurality of points on the screen is acquired based on the corresponding phase difference, the measurement accuracy is improved compared to the triangular distance measuring method. The projector requires no distance measurement-only light source, thereby reducing the size of the projector.

Projector, method of measuring distance to the projector, and method and program for acquiring inclination angles of projection screen

A phase difference sensor is arranged toward a target object such that the sensor can rotate at least 180&#xb0; on its sensor optical axis. As the phase difference sensor rotates, the angle of a sensor viewing field is changed, and the distance to the target object is correctly computed using results measured before and after the change in the angle.

Distance-measuring apparatus, distance-measuring method, and recording medium

A projection apparatus includes a distance measuring unit that measures a distance to a screen on which an image is to be projected; a projection unit that has a zoom mechanism unit capable of changing a zoom magnification of a projection image, executes focusing based on the distance measured by the distance measuring unit and projects an image on the screen; and an elevation angle control unit that controls an elevation angle of the distance measuring unit based on the zoom magnification set by the zoom mechanism unit in such a way that a distance measuring center line of the distance measuring unit corresponds to a center point of a projection area of the projection image, wherein the center point of a projection area is determined according to the zoom magnification of the zoom mechanism unit.

Projection apparatus, elevation angle control method therefor and recording medium

In a projector, CPU supplies a chart generation circuit with chart display information designating display position and display size of a chart image to be projected on a screen such that it comes within viewable ranges of phase difference sensors. For focus control, CPU sets display position near center of the screen, and designates display size regardless of distance between the projector and screen. For keystone correction, CPU designates display position and display size based on relationship among angular field of view, distance, and viewable ranges of the phase difference sensors. A superimposing circuit generates a video by superimposing a video signal with a chart image signal based on the chart display information. A display device projects the video superimposed by the superimposing circuit on the screen. CPU obtains the distance to the screen based on phase difference between reflection lights obtained by a sensor unit and corrects the video.

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Musashimurayama, Japan

Hideaki Inoue