US4352102A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Liquid crystal display of time dependent signals
Assignee: Individual
•
Filing: 1979-10-29
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Granted: 1982-09-28
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Expires: 1999-10-29
Abstract
Abstract A liquid crystal display has a first system of parallel elongated electrodes and a second system of parallel elongated electrodes. The first and second systems are perpendicular to each other. The electrodes in the second system are biased in such a fashion that each electrode in the second system has a greater bias voltage than has the next electrode in the second system. An analog multiplexer connects an analog input signal to all of the electrodes in the first system in a sequential fashion of repeated sweeps. The signal is displayed on the liquid crystal display in a histogram-like format of signal strength versus time.
Inventors
- 👤 Gunter Kramer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 03:47
CPC Classifications
G; G01; G01R; G01R13/00; G01R13/40; G01R13/404; G01R13/408; G01S; G01S7/00; G01S7/52; G01S7/64
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
117 words
An instrument for displaying time-dependent signals in a histogram-like format of signal strength versus time, comprising: a liquid crystal display having a first system of parallel elongated electrodes and a second system of parallel elongated electrodes, the first and second systems being perpendicular to each other; a biasing network connected to the electrodes in the second system and applying bias voltages thereto in a manner that bias voltage of each electrode in the second system is greater than bias voltage of each next electrode in the second system; an analog signal input; and an electronic switch connecting the analog signal input to all of the electrodes in the first system in a sequential fashion of repeated sweeps.
Claim 2
Dependent Claim
117 words
An instrument for displaying time-dependent signals in a histogram-like format of signal strength versus time, comprising: a liquid crystal display having a first system of parallel elongated electrodes and a second system of parallel elongated electrodes, the first and second systems being perpendicular to each other; a biasing network connected to the electrodes in the second system and applying bias voltages thereto in a manner that bias voltage of each electrode in the second system is greater than bias voltage of each next electrode in the second system; an analog signal input; and an electronic switch connecting the analog signal input to all of the electrodes in the first system in a sequential fashion of repeated sweeps.
Claim 3
Dependent Claim
44 words
The instrument defined by claim 1, further including a plurality of capacitors, each capacitor being connected between a single corresponding one of the electrodes and ground in a manner that the capacitors and the electrodes in the first system are brought into one-to-one correspondence.
Claim 4
Dependent Claim
14 words
The instrument defined by claim 1, wherein the electronic switch is an analog multiplexer.
Claim 5
Dependent Claim
38 words
The instrument defined by claim 3, wherein the analog multiplexer is addressed by a clocked binary counter having a least significant bit output, and wherein the second system of electrodes is connected to the least significant bit output.
Claim 6
Dependent Claim
32 words
The instrument defined by claim 1, further including an analog signal inverter operating in a manner that polarity of an input signal at the analog signal input is inverted during alternate sweeps.
Claim 7
Dependent Claim
45 words
The instrument defined by claim 5, wherein the electronic switch is an analog multiplexer, wherein the analog multiplexer is addressed by a clocked binary counter having a most significant bit output, and wherein the analog signal inverter is connected to the most significant bit output.
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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) | 1985-09-27 | 1986-03-29 | 1986-09-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-09-27 | 1990-03-29 | 1990-09-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-09-27 | 1994-03-29 | 1994-09-28 | $7700.00 | Window Closed / Lapsed |