US5617243A
Expired / Lapsed
US
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Electro-optical system and method of displaying images
Assignee: Semiconductor Energy Laboratory Co Ltd
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Filing: 1995-06-05
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Granted: 1997-04-01
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Expires: 2015-06-05
Abstract
Abstract An electro-optical system such as an image display system and a method of displaying images are described. Laser beams of three primary colors are emitted from three lasers in a time sharing mode. These laser beams are directed onto the same optical path and then separately given optical information from the same optical modulating device in accordance with images of the respective primary colors. By this structure, displacement of constituent color images can be effectively avoided.
Inventors
- 👤 Shunpei Yamazaki
- 👤 Yasuhiko Takemura
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 11:42
CPC Classifications
G; G02; G02F; G02F1/00; G02F1/01; H; H04; H04N; H04N9/00; H04N9/12; H04N9/31; H04N9/3129
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
56 words
A method of displaying images by means of an electro-optical system comprising a laser capable of emitting pulsed laser beams and a two-dimensional optical switch for modulating said pulsed laser beams, wherein graded images are formed by periodically changing the pulse width of the laser beams before said laser beams enter into said two-dimensional optical switch.
Claim 2
Independent Claim
56 words
A method of displaying images by means of an electro-optical system comprising a laser capable of emitting pulsed laser beams and a two-dimensional optical switch for modulating said pulsed laser beams, wherein graded images are formed by periodically changing the pulse width of the laser beams before said laser beams enter into said two-dimensional optical switch.
Claim 3
Independent Claim
56 words
A method of displaying images by means of an electro-optical system comprising a laser capable of emitting pulsed laser beams and a two-dimensional optical switch for modulating said pulsed laser beams, wherein graded images are formed by periodically changing the pulse height of the laser beams before said laser beams enter into said two-dimensional optical switch.
Claim 4
Independent Claim
56 words
A method of displaying images by means of an electro-optical system comprising a laser capable of emitting pulsed laser beams and a two-dimensional optical switch for modulating said pulsed laser beams, wherein graded images are formed by periodically changing the pulse height of the laser beams before said laser beams enter into said two-dimensional optical switch.
Claim 5
Independent Claim
69 words
A method of forming an image comprising the steps of: preparing a plurality of lasers, wherein each of said lasers is capable of producing a laser beam having a different color from each other, respectively; producing laser beams from said plurality of lasers in turn in a time sharing mode; directing said laser beams to a two-dimensional optical switch; and modulating said laser beams by said two-dimensional optical switch.
Claim 6
Independent Claim
69 words
A method of forming an image comprising the steps of: preparing a plurality of lasers, wherein each of said lasers is capable of producing a laser beam having a different color from each other, respectively; producing laser beams from said plurality of lasers in turn in a time sharing mode; directing said laser beams to a two-dimensional optical switch; and modulating said laser beams by said two-dimensional optical switch.
Claim 7
Dependent Claim
15 words
The method of claim 3 wherein said two-dimensional optical switch comprises a liquid crystal device.
Claim 8
Dependent Claim
25 words
The method of claim 3 wherein said plurality of lasers emits a red laser beam, a green laser beam and a blue laser beam, respectively.
Claim 9
Independent Claim
88 words
A method of forming an image comprising the steps of: preparing a plurality of lasers, wherein each of said lasers is capable of producing a pulses laser beam having a different color from each other, respectively; producing laser beams from said plurality of lasers periodically in a time sharing mode; directing said laser beams to a two-dimensional optical switch; and modulating said laser beams by said two-dimensional optical switch, wherein said laser beams comprises a predetermined number of laser pulses having a different pulse width from one another.
Claim 10
Independent Claim
88 words
A method of forming an image comprising the steps of: preparing a plurality of lasers, wherein each of said lasers is capable of producing a pulses laser beam having a different color from each other, respectively; producing laser beams from said plurality of lasers periodically in a time sharing mode; directing said laser beams to a two-dimensional optical switch; and modulating said laser beams by said two-dimensional optical switch, wherein said laser beams comprises a predetermined number of laser pulses having a different pulse width from one another.
Claim 11
Independent Claim
88 words
A method of forming an image comprising the steps of: preparing a plurality of lasers, wherein each of said lasers is capable of producing a pulsed laser beam having a different color from each other, respectively; producing laser beams from said plurality of lasers periodically in a time sharing mode; directing said laser beams to a two-dimensional optical switch; and modulating said laser beam by said two-dimensional optical switch, wherein said laser beams comprises a predetermined number of laser pulses having a different pulse height from one another.
Claim 12
Independent Claim
88 words
A method of forming an image comprising the steps of: preparing a plurality of lasers, wherein each of said lasers is capable of producing a pulsed laser beam having a different color from each other, respectively; producing laser beams from said plurality of lasers periodically in a time sharing mode; directing said laser beams to a two-dimensional optical switch; and modulating said laser beam by said two-dimensional optical switch, wherein said laser beams comprises a predetermined number of laser pulses having a different pulse height from one another.
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