US4943145A
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Display method and apparatus
Assignee: Canon Inc
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Filing: 1988-07-12
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Granted: 1990-07-24
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Expires: 2008-07-12
Abstract
Abstract A display system includes a display medium which comprises a display layer providing a display area capable of converting coherent light into light of a shorter wavelength through a nonlinear optical effect and converting the coherent light into scattered light. The display area is illuminated imagewise with coherent light such as a scanning laser beam to form a display image with scattered light having a wavelength different from that of the coherent light at the illuminated part of the display area.
Inventors
- 👤 Seizo Miyata
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 09:35
CPC Classifications
G; G02; G02F; G02F2/00; G02F2/02; G09; G09F; G09F13/00; G09F13/16; G09F13/20; G09F19/00; G09F19/12; G09F19/18; G02F1/00; G02F1/35; G02F1/37
Claims Analysis
Total Claims: 27
Claim 1
Independent Claim
74 words
A display method, comprising the steps of: providing a display medium having a display area capable of converting coherent light into light of a shorter wavelength through a nonlinear optical effect and converting the coherent light into scattered light, and illuminating imagewise the display area with coherent light to form a display image with scattered light having a wavelength different from that of the coherent light at the illuminated part of the display area.
Claim 2
Dependent Claim
74 words
A display method, comprising the steps of: providing a display medium having a display area capable of converting coherent light into light of a shorter wavelength through a nonlinear optical effect and converting the coherent light into scattered light, and illuminating imagewise the display area with coherent light to form a display image with scattered light having a wavelength different from that of the coherent light at the illuminated part of the display area.
Claim 3
Dependent Claim
18 words
A method according to claim 1, wherein said display medium comprises a display layer providing the display area.
Claim 4
Dependent Claim
17 words
A method according to claim 2, wherein said display layer is in the form of a film.
Claim 5
Dependent Claim
17 words
A method according to claim 3, wherein said film comprises a low-molecular weight compound and a polymer.
Claim 6
Dependent Claim
24 words
A method according to claim 4, wherein said low-molecular weight compound is an inorganic compound in the form of particles dispersed in the film.
Claim 7
Dependent Claim
24 words
A method according to claim 4, wherein said low-molecular weight compound is an organic compound in the form of particles dispersed in the film.
Claim 8
Dependent Claim
21 words
A method according to claim 4, wherein said film comprises a solid solution of the low-molecular weight compound in the polymer.
Claim 9
Dependent Claim
18 words
A method according to claim 4, wherein said low-molecular weight compound is in the form of a crystal.
Claim 10
Dependent Claim
11 words
A method according to claim 4, wherein said polymer is polyoxyalkylene.
Claim 11
Dependent Claim
11 words
A method according to claim 7, wherein said polymer is polyoxyalkylene.
Claim 12
Dependent Claim
14 words
A method according to claim 2, wherein said display layer contains a fluorescent material.
Claim 13
Dependent Claim
20 words
A method according to claim 2, wherein said display medium comprises a fluorescent layer in addition to the display layer.
Claim 14
Dependent Claim
26 words
A method according to claim 2, wherein said display medium comprises a second display layer showing a nonlinear optical effect in addition to said display layer.
Claim 15
Dependent Claim
25 words
A method according to claim 13, wherein said second display layer comprises a film of a solid solution of a low-molecular weight compound in polyoxyalkylene.
Claim 16
Dependent Claim
15 words
A method according to claim 2, wherein said display medium further comprises a bandpass filter.
Claim 17
Dependent Claim
15 words
A method according to claim 2, wherein said display medium further comprises a reflection layer.
Claim 18
Dependent Claim
15 words
A method according to claim 2, wherein said display medium further comprises a dielectric mirror.
Claim 19
Dependent Claim
13 words
A method according to claim 1, wherein said coherent light comprises laser beam.
Claim 20
Dependent Claim
74 words
A display apparatus, comprising: a display medium having a display area capable of converting coherent light into light of a shorter wavelength through a nonlinear optical effect and converting the coherent light into scattered light, and imagewise illumination means for illuminating imagewise the display area with coherent light to form a display image with scattered light having a wavelength different form that of the coherent light at the illuminated part of the display area.
Claim 21
Dependent Claim
74 words
A display apparatus, comprising: a display medium having a display area capable of converting coherent light into light of a shorter wavelength through a nonlinear optical effect and converting the coherent light into scattered light, and imagewise illumination means for illuminating imagewise the display area with coherent light to form a display image with scattered light having a wavelength different form that of the coherent light at the illuminated part of the display area.
Claim 22
Dependent Claim
18 words
An apparatus according to claim 19, wherein said display medium comprises a display layer providing the display area.
Claim 23
Dependent Claim
17 words
An apparatus according to claim 20, wherein said display layer is in the form of a film.
Claim 24
Dependent Claim
21 words
An apparatus according to claim 19, wherein said imagewise illumination means includes a coherent light source and scanning light deflecting means.
Claim 25
Dependent Claim
29 words
An apparatus according to claim 22, wherein said imagewise illumination means includes at least two coherent light sources emitting different wavelengths of coherent light in a longer-wavelength non-visible region.
Claim 26
Dependent Claim
27 words
An apparatus according to claim 22, wherein said imagewise illumination means includes three coherent light sources emitting different wavelengths of coherent light in a longer-wavelength non-visible region.
Claim 27
Dependent Claim
21 words
An apparatus according to claim 22, wherein said scanning light deflecting means comprises a polygonal mirror, Galvano mirror or rotational mirror.
References Cited (Backward Citations)
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| 3.5 Years (Year 4) | 1993-07-23 | 1994-01-22 | 1994-07-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-07-23 | 1998-01-22 | 1998-07-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-07-23 | 2002-01-22 | 2002-07-24 | $7700.00 | Window Closed / Lapsed |