Loading patent…
AssigneeAlps Electric Co., Ltd.
InventorsIchiro Morishita, Yuichi Yasuda, Yuichi Umeda, Arao Sato, Junichi Saito, Masahiro Tanaka, Tomomitsu Muta, Masatoshi Uchio, Kazuhiro Katagiri, Masaru Nakayama
Estimating the term…
According to the present invention there is provided a space coordinates detecting device wherein a detecting section for detecting light emitted from a light source is provided, thereby permitting detection of a relative angle between a light emitting sections and the detecting section and hence permitting application of the detecting device to an input apparatus. The detecting section is provided with a light sensing element 23 having quartered light sensing portions. In the light emitting section, distinguishable lights are emitted from two light sources. The lights thus emitted are throttled through apertures and applied as separate square light spots S16 and S17 to the light-sensitive surface of the light sensing element 23. By calculating a difference in the detected output among the quartered light sensing portions, it is possible to determine the center I1 of the square light spot S16 and the center I2 of the square light spot S17. A relative rotational angle of the light emitting section and the detecting section with respect to Z axis can be determined by calculating an inclination angle .alpha. on X-Y orthogonal coordinates of a line x connecting both centers I1 and I2.
A space coordinates detecting device characterized in that a light emitting section and a detecting section are disposed in spaced relation to each other, said light emitting section having two light sources each adapted to emit a distinguishable light and spaced from each other, said detecting section having an aperture for making each light into a light spot of a predetermined area, said detecting section further having an X side light sensing portion for detecting movement in X axis direction of each light spot and a Y side light sensing portion for detecting movement in Y axis direction of each light spot when X-Y orthogonal coordinates intersecting an axis which passes through the center of said aperture are set, and there is provided a computing section which determines the position of each light spot on the basis of a difference in the amount of light received in the X side light sensing portion between both light spots and a difference in the amount of light received in the Y side light sensing portion and then determines an inclination angle of a line connecting the centers of both light spots on said X-Y coordinates.
A space coordinates detecting device characterized in that a light emitting section and a detecting section are disposed in spaced relation to each other, with a substantially linearly polarized light being emitted from said light emitting section, said detecting section having two filters for passing therethrough polarization components inclined in directions reverse to each other relative to the polarization direction of light emitted from said light emitting section, said detecting section further having light sensing portions for sensing the lights which have passed through said filters, and there is provided a computing section which determines a relative rotational angle between the light emitting section and the detecting section on the basis of a difference in the amount of received light between the lights which have passed through said filters.
A space coordinates detecting device characterized in that a light emitting section and a detecting section are disposed in positions spaced from each other, said light emitting section having two light sources each adapted to emit a distinguishable light and spaced from each other, said detecting section having a plurality of apertures for throttling the lights emitted from both said light sources into light spots of a predetermined area and also having a plurality of light sensing elements for sensing the light spots in opposed relation to said apertures, said apertures being positioned in Y axis direction when arbitrary X-Y orthogonal coordinates are set, one of said light sensing elements being a Y side light sensing element for detecting movement in the Y axis direction of the light spots and the remaining light sensing element being an X-Y side light sensing element for detecting movement in the X and Y axis directions of the light spots.
A space coordinates detecting device characterized in that a light emitting section and a detecting section are disposed in positions spaced from each other, said light emitting section having three light sources disposed spacedly from one another and adapted to emit lights distinguishable from one another, said detecting section having a plurality of apertures for throttling the lights emitted from said light sources into light spots of a predetermined area and also having three light sensing elements for sensing the light spots in opposed relation to the apertures, one of said light sensing elements being a Y side light sensing element for detecting movement in Y axis direction of the light spots when arbitrary X-Y orthogonal coordinates are set, another light sensing element being an X side light sensing element for detecting movement in the X axis direction of the light spots, and the remaining light sensing element being an X-Y side light sensing element for detecting movement in both X and Y axis directions of the light spots, said Y side light sensing element and said X-Y side light sensing element being disposed in the Y axis direction, said X side light sensing element and said X-Y side light sensing element being disposed in the X axis direction.
A space coordinates detecting device characterized in that a light source and a detecting section are disposed in positions spaced from each other, said detecting section having three apertures for throttling light emitted from said light source into light spots of a predetermined area and also having three light sensing portions for sensing the light spots, said apertures being positioned in Y axis direction when arbitrary X-Y orthogonal coordinates are set, one of said light sensing portions being a X side light sensing portion wherein the quantity of light received varies with movement in the X direction of the light spots, and the remaining two light sensing portions being Y side light sensing portions wherein the quantity of light received varies with movement in the Y axis direction of the light spots.
Dependencies are inferred from the claim text.