Indicator device and illumination device
AssigneeIdec Izumi Corporation
InventorsToshihiro Fujita, Akito Okamoto, Masaru Mamiya, Ikkan Nishihara, Shinichi Tanabe
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Abstract
An indicator device is intended to make an indication by illuminating a predetermined indicating surface, and comprises a light source (12) for emitting a light (L1) of the first wavelength and a fluorescent plate (22) disposed between the light source and the indicating surface for changing at least part of the light of the first wavelength projected from the light source into a light (L2) of the second wavelength longer than the first wavelength and projecting it towards the indicating surface.
Claims32
An indicator device which makes an indication by illuminating a predetermined indicating surface, comprising:
- a light source for emitting a light of a first wavelength (L1);
- and
- a fluorescent plate provided between said light source and said indicating surface, for changing at least part of said light of said first wavelength projected thereto from said light source into a light of a second wavelength (L2) longer than said first wavelength and projecting said light of said second wavelength towards said indicating surface,
- wherein said light source comprises a plurality of semiconductor light-emitting elements for emitting a light of any wavelength ranging from ultraviolet to blue as said light of said first wavelength (L1),
- wherein said plurality of semiconductor light-emitting elements are arranged in a matrix with a plurality of rows and columns to face the back surface of said fluorescent plate and uniformly project said light of first said wavelength towards said fluorescent plate.
An indicator device which makes an indication by illuminating a predetermined indicating surface, comprising:
- a light source for emitting a light of a first wavelength;
- a fluorescent plate provided between said light source and said indicating surface, for changing at least part of said light of said first wavelength projected thereto from said light source into a light of a second wavelength longer than said first wavelength and projecting said light of said second wavelength towards said indicating surface;
- and
- a light diffusion member for diffusing or dispersing a light on an optical path from said light source towards said indicating surface,
- wherein said light diffusion member is a sheet member made of a light-transmissible material, including a plurality of prism surfaces arranged two-dimensionally on a light-outgoing surface side from which a light is projected, and is disposed with said light-outgoing surface side facing said indicating surface, and
- said plurality of prism surfaces of said sheet member are provided by disposing a plurality of prisms of polypyramid on said light-outgoing surface side of said sheet member so that bottom surfaces of adjacent prisms are in intimate contact with each other without any clearance.
An indicator device which makes an indication by illuminating a predetermined indicating surface, comprising:
- a light source for emitting a light of a first wavelength;
- a fluorescent plate provided between said light source and said indicating surface, for changing at least part of said light of said first wavelength projected thereto from said light source into a light of a second wavelength longer than said first wavelength and projecting said light of said second wavelength towards said indicating surface;
- and
- a filter provided between said fluorescent plate and said indicating surface, for transmitting at least part of said light projected from said fluorescent plate towards said indicating surface,
- wherein a color of a light through said filter to illuminate said indicating surface in an on state of said light source and an appearance color of said filter which substantially defines a color of said indicating surface in an off state of said light source are substantially identical or similar to each other.
An indicator device which makes an indication by illuminating a predetermined indicating surface, comprising:
- a light source for emitting a light of a first wavelength;
- and
- a fluorescent plate provided between said light source and said indicating surface, for changing at least part of said light of said first wavelength projected thereto from said light source into a light of a second wavelength longer than said first wavelength and projecting said light of said second wavelength towards said indicating surface,
- wherein said light source has a fist emitter for emitting said light of said first wavelength and a second emitter for emitting a light of another wavelength different from said first wavelength, and
- a color of a light projected from said fluorescent plate is changeable by projecting said lights emitted from said first and second emitters to said fluorescent plate and changing the emitting condition of said first and second emitters.
An indicator device which makes an optical indication on a predetermined indicating surface by projecting a predetermined light from said indicating surface, comprising:
- a light source for emitting a light of a first wavelength;
- and
- a wavelength changing member provided between said light source and said indicating surface and formed as one unit including a fluorescent material receiving said light of said first wavelength for emitting a light of a second wavelength longer than said first wavelength and a filter material for attenuating said light of said first wavelength, for projecting said light of said second wavelength emitted by said fluorescent material which receives said light of said first wavelength projected thereto towards said indicating surface and attenuating the rest of said light of said first wavelength which is projected thereto and not changed by said fluorescent material with said filter material not to be substantially transmitted.
An indicator device which makes an optical indication on a predetermined indicating surface by projecting a predetermined light from said indicating surface, comprising:
- a light source for emitting a light of a first wavelength;
- and
- a wavelength changing member constituted of a plurality of fluorescent plates which are layered for projecting part of an incident light and emitting lights of different wavelengths longer than said first wavelength from the rest of said incident light, having a light-incident surface receiving said light from said light source and a light-outgoing surface for projecting said light of said first wavelength and said lights emitted by said plurality of flourescent plates towards said indicating surface.
An illuminating device guiding a light from a light source to a predetermined light-projected surface to make an illumination entirely on said light-projected surface, comprising:
- a sheet member made of a light-transmissible material, including a plurality of prism surfaces arranged two-dimensionally on a light-outgoing surface side from which a light is projected, said sheet member being provided between said light source and said light-projected surface with said light-outgoing surface side facing said light-projected surface,
- wherein said plurality of prism surfaces of said sheet member are provided by disposing a plurality of prisms of polypyramid on said light-outgoing surface side of said sheet member so that bottom surfaces of adjacent prisms are in intimate contact with each other without any clearance.
An indicator device using a light emitting diode element, comprising:
- an emitter body including said light emitting diode element mounted two-dimensionally;
- and
- a first dome-shaped cap member including a predetermined fluorescent material and attached around said light emitting diode element in said emitter body.
Dependencies are inferred from the claim text.