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US4691104A
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One-dimensional pyroelectric sensor array
Assignee: Murata Manufacturing Co Ltd
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Filing: 1985-06-12
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Granted: 1987-09-01
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Expires: 2005-06-12
Abstract
Abstract A one-dimensional pyroelectric sensor array comprises (1) a base plate made of a pyroelectric material; a plurality of strip elements made of pyroelectric material having a heat-sensitive region at a free end thereof, each supported only at the other end to the base plate to form an integrated structure with the base plate; and (2) one pair of detecting electrodes formed on the heat-sensitive region of the free end of each strip element.
Inventors
- 👤 Michihiro Murata
- 👤 Katsuhiko Tanaka
- 👤 Hiroyuki Seto
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 06:12
CPC Classifications
G; G01; G01J; G01J5/00; G01J5/10; G01J5/34; H; H10; H10N; H10N15/00; H10N15/10; H10N19/00
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
108 words
A one-dimensional pyroelectric sensor array which comprises: a base plate made of a pyroelectric material; a plurality of strip elements made of pyroelectric material and having a free end and another end, said strip elements each having a heat-sensitive region at said free end thereof, and each being supported only at the other end to the base plate to form an integrated structure with the base plate, each of said strip elements being separated from each adjacent strip element at portions thereof away from said base plate; and at least one pair of detecting electrodes formed on the heat-sensitive region of the free end of each strip element.
Claim 2
Dependent Claim
108 words
A one-dimensional pyroelectric sensor array which comprises: a base plate made of a pyroelectric material; a plurality of strip elements made of pyroelectric material and having a free end and another end, said strip elements each having a heat-sensitive region at said free end thereof, and each being supported only at the other end to the base plate to form an integrated structure with the base plate, each of said strip elements being separated from each adjacent strip element at portions thereof away from said base plate; and at least one pair of detecting electrodes formed on the heat-sensitive region of the free end of each strip element.
Claim 3
Dependent Claim
15 words
A one-dimensional pyroelectric sensor array according to claim 1, wherein said strip elements are rectangular.
Claim 4
Dependent Claim
26 words
A one-dimensional pyroelectric sensor array according to claim 1, wherein said strip elements become narrower away from the region on which said detecting electrodes are formed.
Claim 5
Dependent Claim
26 words
A one-dimensional pyroelectric sensor array according to claim 1, wherein a light-absorbing layer is formed on one of said at least one pair of detecting electrodes.
Claim 6
Dependent Claim
36 words
A one-dimensional pyroelectric sensor array according to claim 1, wherein conductive films narrower than said strip elements are formed on said strip elements, extending from said detecting electrodes to a side end of said base plate.
Claim 7
Dependent Claim
25 words
A one-dimensional pyroelectric sensor array according to claim 1, wherein said detecting electrodes are arranged on opposite sides of said strip element from each other.
Claim 8
Dependent Claim
25 words
A one-dimensional pyroelectric sensor array according to claim 6, wherein the direction of the polarization of said pyroelectric material is perpendicular to said detecting electrodes.
Claim 9
Dependent Claim
58 words
A one-dimensional pyroelectric sensor array according to claim 6, wherein one of said detecting electrodes has two parts connected electrically with each other, and the directions of the polarization of the pyroelectric material between one of the parts and the other electrode and between the other of the parts and the other electrode are antiparallel to each other.
Claim 10
Dependent Claim
30 words
A one-dimensional pyroelectric sensor array according to claim 1, wherein said at least one pair of electrodes is formed parallel to each other on one plane of said strip element.
Claim 11
Dependent Claim
35 words
A one-dimensional pyroelectric sensor array according to claim 9, wherein a third electrode is formed on a plane which is counter to said plane on which said at least one pair of electrodes is formed.
Claim 12
Dependent Claim
24 words
A one-dimensional pyroelectric sensor array according to claim 10, wherein the direction of the polarization of said pyroelectric material is perpendicular to said electrodes.
Claim 13
Dependent Claim
53 words
A one-dimensional pyroelectric sensor array according to claim 10, wherein the direction of the polarization of said pyroelectric material interposed between one of said at least one pair of electrodes and said third electrode is antiparallel to that between the other of the at least one pair of electrodes and the third electrode.
Claim 14
Dependent Claim
100 words
A one-dimensional pyroelectric sensor array according to claim 1, wherein said base plate and said strip elements are composed of a first pyroelectric layer, a heat-insulating layer and a second pyroelectric layer each applied to the other successively; a first pair of detecting electrodes being applied on the first pyroelectric layer and on the second pyroelectric layer of each strip element, respectively; and a second pair of detecting electrodes being interposed each beween the first pyroelectric layer and the heat-insulating layer and between the heat-insulating layer and the second pyroelectric layer, which second pair of detecting electrodes being connected electrically.
Claim 15
Dependent Claim
25 words
A one-dimensional pyroelectric sensor array according to claim 13, wherein said first pyroelectric layer and said second pyroelectric layer are polarized in the same direction.
Claim 16
Dependent Claim
28 words
A one-dimensional pyroelectric sensor array according to claim 13, wherein said first pyroelectric layer and said second pyroelectric layer are polarized in the reverse direction with each other.
Claim 17
Dependent Claim
44 words
A one-dimensional pyroelectric sensor array according to claim 5, wherein a pair of said conductive films extend from respective said detecting electrodes on opposite sides of said strip element, said pair of conductive films being offset from each other for minimizing the capacitance therebetween.
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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) | 1990-08-31 | 1991-03-02 | 1991-09-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-08-31 | 1995-03-02 | 1995-09-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-08-31 | 1999-03-02 | 1999-09-01 | $7700.00 | Window Closed / Lapsed |