US5043719A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Matrix circuit
Assignee: Canon Inc
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Filing: 1990-12-21
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Granted: 1991-08-27
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Expires: 2010-12-21
Abstract
Abstract A matrix circuit has a plurality of blocks each including a plurality of semiconductor unit elements, the semiconductor unit elements of each block being adapted to be impressed with a predetermined voltage at the same time, each unit element becoming active when impressed with the predetermined voltage, and a drive device for impressing the predetermined voltage to the plurality of blocks sequentially. The matrix circuit includes a first selective device for selecting either ground or a desired other than ground voltage, and a second selective device for selecting one of the output of the drive device and the output of the first selective device whereby the output of the second selective device renders active the plurality of unit elements of each block.
Inventors
- 👤 Katsumi Nakagawa
- 👤 Toshiyuki Komatsu
- 👤 Shinichi Seito
- 👤 Yasuo Kuroda
- 👤 Katsunori Hatanaka
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 16:48
CPC Classifications
G; G09; G09G; G09G3/00; G09G3/20; G09G3/2085; H; H04; H04N; H04N1/00; H04N1/40; H04N1/40056
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
157 words
A matrix circuit comprising: a plurality of blocks, each of said blocks (i) including a plurality of thin-film semiconductor unit elements that are activated in response to the application of a predetermined voltage thereto, and (ii) being arranged such that the predetermined voltage can be applied to each of the elements associated with said block simultaneously; drive means for supplying said blocks sequentially with the predetermined voltage and driving the predetermined voltage from a first reference voltage source; pulse generating means for generating the predetermined voltage as a pulse, the voltage being derived from a second voltage source, said pulse generating means performing the pulse generating operation independent of said drive means; and selective means for supplying the pulse to all of said blocks simultaneously when said drive means does not supply the predetermined voltage to said plurality of blocks sequentially, the pulse supplying being performed in cooperation with said drive means and said pulse generating means.
Claim 2
Dependent Claim
157 words
A matrix circuit comprising: a plurality of blocks, each of said blocks (i) including a plurality of thin-film semiconductor unit elements that are activated in response to the application of a predetermined voltage thereto, and (ii) being arranged such that the predetermined voltage can be applied to each of the elements associated with said block simultaneously; drive means for supplying said blocks sequentially with the predetermined voltage and driving the predetermined voltage from a first reference voltage source; pulse generating means for generating the predetermined voltage as a pulse, the voltage being derived from a second voltage source, said pulse generating means performing the pulse generating operation independent of said drive means; and selective means for supplying the pulse to all of said blocks simultaneously when said drive means does not supply the predetermined voltage to said plurality of blocks sequentially, the pulse supplying being performed in cooperation with said drive means and said pulse generating means.
Claim 3
Dependent Claim
21 words
A matrix circuit according to claim 1, wherein each of said plurality of semiconductor unit elements includes a thin film semiconductor.
Claim 4
Dependent Claim
17 words
A matrix circuit according to claim 2, wherein said thin film semiconductor is an amorphous silicon hydride.
Claim 5
Dependent Claim
14 words
A matrix circuit according to claim 2, wherein said thin film semiconductor is photoconductive.
Claim 6
Dependent Claim
15 words
A matrix circuit according to claim 1, wherein each said unit element comprises a photodiode.
Claim 7
Dependent Claim
16 words
A matrix circuit according to claim 1, wherein each said unit element comprises a photoconductive photosensor.
Claim 8
Dependent Claim
17 words
A matrix circuit according to claim 1, wherein each said unit element comprises a field effect transistor.
Claim 9
Dependent Claim
15 words
A matrix circuit according to claim 1, wherein each said unit element comprises a photoreceptor.
Claim 10
Dependent Claim
10 words
A photosensor comprising a matrix circuit according to claim 1.
Claim 11
Dependent Claim
13 words
A liquid crystal display apparatus comprising a matrix circuit according to claim 1.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1994-08-26 | 1995-02-25 | 1995-08-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-08-26 | 1999-02-25 | 1999-08-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-08-26 | 2003-02-25 | 2003-08-27 | $7700.00 | Window Closed / Lapsed |