US5028969A
Expired / Lapsed
US
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Semiconductor device for a space modulation matrix and method for driving a space modulation matrix
Assignee: NEC Corp
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Filing: 1989-09-13
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Granted: 1991-07-02
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Expires: 2009-09-13
Abstract
Abstract A space modulation matrix is composed of semiconductor transmittivity modulation elements arranged in a matrix pattern. A transmittivity of the transmittivity modulation elements is changed by supplying a light or applying a voltage greater than a switching voltage of the transmittivity modulation elements to a selected number of the transmittivity modulation elements, so that a space modulation is provided on the space modulation matrix, and is renewed by any number of times.
Inventors
- 👤 Kenichi Kasahara
- 👤 Yoshiharu Tashiro
- 👤 Mitsunori Sugimoto
- 👤 Keiichi Kubota
- 👤 Shigeru Kawai
- 👤 Ichiro Ogura
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 09:19
CPC Classifications
B; B82; B82Y; B82Y20/00; G; G02; G02F; G02F1/00; G02F1/01; G02F1/015; G02F1/017; G02F1/29; G02F1/31; G06; G06N; G06N3/00; G06N3/02; G06N3/06; G06N3/063; G06N3/067; G06N3/0675; G11; G11C; G11C7/00; G11C7/005; G02F2203/00; G02F2203/12
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
128 words
A semiconductor device for a transmittivity modulation matrix, comprising: transmittivity modulation elements arranged in a matrix pattern to provide said transmittivity modulation matrix, such that applying a first light radiation to said transmittivity modulation elements causes said transmittivity modulation elements to store said light radiation therein and have a transmittivity representative of said stored light radiation; and a semiconductor device array including semiconductor light emitting devices, light emitted from said semiconductor light emitting devices radiating to a selected number of said transmittivity modulation elements in said transmittivity modulation matrix wherein said first light radiation remains stored therein until a second light radiation is applied which causes said first light radiation stored in said transmittivity modulation matrix to be erased and said second light radiation to be stored therein.
Claim 2
Dependent Claim
128 words
A semiconductor device for a transmittivity modulation matrix, comprising: transmittivity modulation elements arranged in a matrix pattern to provide said transmittivity modulation matrix, such that applying a first light radiation to said transmittivity modulation elements causes said transmittivity modulation elements to store said light radiation therein and have a transmittivity representative of said stored light radiation; and a semiconductor device array including semiconductor light emitting devices, light emitted from said semiconductor light emitting devices radiating to a selected number of said transmittivity modulation elements in said transmittivity modulation matrix wherein said first light radiation remains stored therein until a second light radiation is applied which causes said first light radiation stored in said transmittivity modulation matrix to be erased and said second light radiation to be stored therein.
Claim 3
Dependent Claim
43 words
A semiconductor device for a transmittivity modulation matrix, according to claim 1, wherein: each of said transmittivity modulation elements is of a semiconductor device selected from one of adjacent n-, p-, n- and p-semiconductor layers and adjacent p-, n-, p- and n-semiconductor layers.
Claim 4
Dependent Claim
39 words
A semiconductor device for a transmittivity modulation matrix, according to claim 1, further comprising: a semiconductor device array including semiconductor light detecting devices, said light transmitting through said transmittivity modulation matrix being detected by said semiconductor light detecting devices.
Claim 5
Independent Claim
92 words
A method for driving a transmittivity modulation matrix comprising transmittivity modulation elements arranged in a matrix pattern and having a transmittivity representative of light radiated into said transmittivity modulation elements comprising: radiating light at least once to a selected number of said transmittivity modulation elements in said transmittivity modulation matrix, for changing the transmittivity of said transmittivity modulation elements; and radiating light to said transmittivity modulation matrix on a first side thereof to provide transmitted light on a second side thereof; and detecting said transmitted light to carry out a predetermined calculation.
Claim 6
Independent Claim
92 words
A method for driving a transmittivity modulation matrix comprising transmittivity modulation elements arranged in a matrix pattern and having a transmittivity representative of light radiated into said transmittivity modulation elements comprising: radiating light at least once to a selected number of said transmittivity modulation elements in said transmittivity modulation matrix, for changing the transmittivity of said transmittivity modulation elements; and radiating light to said transmittivity modulation matrix on a first side thereof to provide transmitted light on a second side thereof; and detecting said transmitted light to carry out a predetermined calculation.
Claim 7
Independent Claim
87 words
A method for driving a transmittivity modulation matrix responsive to space modulation information, comprising: arranging transmittivity modulation elements in a matrix pattern to provide said transmittivity modulation matrix; applying a voltage less than a switching voltage of said transmittivity modulation elements and greater than a holding voltage thereof to said transmittivity modulation elements; and applying a voltage greater than said switching voltage to a selected number of said transmittivity modulation elements to be thereby turned on, whereby a space modulation is provided on said transmittivity modulation matrix.
Claim 8
Independent Claim
87 words
A method for driving a transmittivity modulation matrix responsive to space modulation information, comprising: arranging transmittivity modulation elements in a matrix pattern to provide said transmittivity modulation matrix; applying a voltage less than a switching voltage of said transmittivity modulation elements and greater than a holding voltage thereof to said transmittivity modulation elements; and applying a voltage greater than said switching voltage to a selected number of said transmittivity modulation elements to be thereby turned on, whereby a space modulation is provided on said transmittivity modulation matrix.
Claim 9
Dependent Claim
68 words
A method for driving a transmittivity modulation matrix, according to claim 5, wherein: said voltage less than said switching voltage is applied to anodes of said transmittivity modulation elements, while zero voltage is applied to cathodes thereof; and said voltage greater than said switching voltage is the summation of said voltage less than said switching voltage and an absolute value of a negative voltage applied to said cathodes.
Claim 10
Dependent Claim
38 words
A method for driving a transmittivity modulation matrix, according to claim 6, wherein: said voltage less than said switching voltage is applied in parallel to a selected number of said anodes in accordance with said space modulation information.
References Cited (Backward Citations)
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| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
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| 3.5 Years (Year 4) | 1994-07-01 | 1994-12-31 | 1995-07-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-07-01 | 1998-12-31 | 1999-07-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-07-01 | 2002-12-31 | 2003-07-02 | $7700.00 | Window Closed / Lapsed |