US5006933A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Liquid crystal television
Assignee: Citizen Watch Co Ltd
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Filing: 1989-08-29
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Granted: 1991-04-09
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Expires: 2009-08-29
Abstract
Abstract In a liquid crystal television, segment electrodes of a liquid crystal panel are divided into image segment electrodes and indicator segment electrodes. A liquid crystal display unit includes an image segment driver for receiving a video signal from a television receiver and driving the image segment electrodes, and an indicator segment driver for receiving a tuning voltage from a tuning voltage control unit and driving the indicator segment electrodes. The image and indicator segment drivers are driven by signals having different voltage waveforms.
Inventors
- 👤 Fuminori Suzuki
- 👤 Heihachiro Ebihara
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 11:30
CPC Classifications
H; H04; H04N; H04N5/00; H04N5/44; H04N5/50
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
141 words
In a liquid crystal television including a television receiver for receiving a television broadcast signal and outputting a video signal, a tuning voltage control unit for outputting a tuning voltage for said television receiver, and a liquid crystal display unit having a liquid crystal panel, said liquid crystal panel being arranged to simultaneously display a broadcast image and channel mark, comprising: a plurality of common electrodes; a plurality of segment electrodes divided into image segment electrodes and indicator segment electrodes; an image segment driver for receiving the video signal from said television receiver and driving said image segment electrodes according to a first voltage waveform; and an indicator segment driver for receiving the tuning voltage from said tuning voltage control unit and driving said indicator segment electrodes according to a second voltage waveform different from that of said first voltage waveform.
Claim 2
Dependent Claim
141 words
In a liquid crystal television including a television receiver for receiving a television broadcast signal and outputting a video signal, a tuning voltage control unit for outputting a tuning voltage for said television receiver, and a liquid crystal display unit having a liquid crystal panel, said liquid crystal panel being arranged to simultaneously display a broadcast image and channel mark, comprising: a plurality of common electrodes; a plurality of segment electrodes divided into image segment electrodes and indicator segment electrodes; an image segment driver for receiving the video signal from said television receiver and driving said image segment electrodes according to a first voltage waveform; and an indicator segment driver for receiving the tuning voltage from said tuning voltage control unit and driving said indicator segment electrodes according to a second voltage waveform different from that of said first voltage waveform.
Claim 3
Dependent Claim
40 words
A television according to claim 1, wherein a plurality of indicator segment electrodes corresponding to a length of said channel mark are arranged at a first or second end of said liquid crystal panel to constitute said indicator display portion.
Claim 4
Dependent Claim
31 words
A television according to claim 1, wherein said indicator segment driver is driven by a signal having a voltage waveform whose magnitude is larger than that of said image segment driver.
Claim 5
Dependent Claim
42 words
A television according to claim 3, wherein said indicator segment driver outputs a signal having a voltage waveform for fixing a potential of said indicator segment electrodes to substantially a common potential during a period excluding timings for displaying said channel mark.
Claim 6
Dependent Claim
33 words
A television according to claim 1, wherein color filter stripes of R (red), G (green), and B (blue) are formed on said image and indicator segment electrodes formed in said liquid crystal panel.
Claim 7
Dependent Claim
44 words
A television according to claim 5, wherein said indicator segment electrodes are divided into first color selection electrodes corresponding to filters of one color of the R, G, and B and second color selection electordes obtained by commonly connecting filters of remaining two colors.
Claim 8
Dependent Claim
41 words
A television according to claim 6, wherein all said first color selection electrodes in said indicator display portion are commonly connected to provide a first common electrodes, and said second color electrodes are commonly connected to provide a second common electrode.
Claim 9
Dependent Claim
55 words
A television according to claim 7, wherein one of a VHF channel mark ON signal and a UHF channel mark ON signal selectively output from said indicator segment driver is supplied to said first common electrode, and the other of the VHF and UHF channel mark ON signals is supplied to said second common electrode.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1994-04-08 | 1994-10-08 | 1995-04-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-04-08 | 1998-10-08 | 1999-04-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-04-08 | 2002-10-08 | 2003-04-09 | $7700.00 | Window Closed / Lapsed |