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AssigneeSharp Kabushiki Kaisha
InventorsYoshihiro Izumi, Sayuri Fujiwara
Estimating the term…
An optical scanning device comprises a light source for emitting a light, a light guide path being adapted to receive the emitted light and to transmitting the received light therein, a plurality of diffraction gratings disposed on the light guide path for taking out the transmitted light in a form of an array, and a liquid crystal shutter for scanning the taken out light in the form of the array. An optical scanning device comprises a first substrate, a second substrate, a liquid crystal layer sandwiched between the first substrate and the second substrate, a light guide path disposed on the first substrate for entering a light transmitted therein into the liquid crystal layer, a plurality of micro lenses disposed on the second substrate for converging the entered light, wherein, assuming that n.sub.CORE is a refraction index of a light guide medium forming the light guide path, that n.sub.LCON is a refraction index of a liquid crystal when an electric field is applied (on), and that n.sub.LCOFF is a refraction index of the liquid crystal when the electric field is not applied (off), a relation of n.sub.LCON >n.sub.CORE >n.sub. LCOFF or n.sub.LCON <n.sub.CORE <n.sub.LCOFF is satisfied.
An optical scanning device comprising:
An optical scanning device comprising:
An optical scanning device comprising:
An optical scanning device comprising:
Dependencies are inferred from the claim text.
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Optical coupling means: utilising prism or grating
Based on liquid crystals, e.g. single liquid crystal display cells: liquid crystal optical waveguides or liquid crystal cells specially adapted…
Illuminating devices: edge-illuminating devices, i.e. illuminating from the side
Simultaneously or substantially simultaneously scanning picture elements on one main scanning line: using electrically scanned linear arrays ,…
Term ended 7 Mar 2014 (estimated)
USPTO file history isn’t available for this patent, so only indexed dates are shown.
1. Field of the Invention
The present invention relates to an optical scanning device, an optical scanning type display and an image data input/output device. Particularly, it relates to an optical scanning device which can be used as an optical scanning portion of an optical scanning type display, the scanning portion being able to be used for an AV equipment field such as a television, a game and the like, or an OA equipment field such as a personal computer, a word processor and the like, or an optical data processing field such as an optical modulation component and an optical operation component, and furthermore it relates to an optical scanning device which can be also used as an optical scanning portion of an image data input/output device of a laser beam printer and the like.
2. Description of the Related Arts
FIG. 1 is a schematic view of a first embodiment of an optical scanning device according to the present invention.
FIG. 2 is an illustrating view illustrating a principle of a diffraction grating.
FIG. 3 is a schematic view of a second embodiment of an optical scanning device according to the present invention.
A first embodiment
A first embodiment of the optical scanning device according to the present invention will be described hereinafter referring to FIG. 1
The first embodiment of the optical scanning device comprises a light source 15, a light guide medium 16 and a shutter 17. The light guide medium 16 is adapted to divide a light 18 from the light source 15 into a plurality of light beams in the form of the array. Essentially, the light guide medium 16 is adapted to transmit the light, and can not emit the light outside. Therefore, a light 20 transmitted within the light guide medium 16 is taken out by arranging a diffraction grating at a required place of the light guide medium 16. The shutter 17 is provided in order to transmit or cut off the light beam in the form of the array emitted from the light guide medium 16. Thereby, the light can be scanned in order.