Patent US3884324A successfully refreshed from Google Patents.
Patent US5122787A successfully refreshed from Google Patents.
US5122787A
Expired / Lapsed
US
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Ferroelectric liquid crystal touch panel
Assignee: Seiko Precision Inc
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Filing: 1990-01-16
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Granted: 1992-06-16
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Expires: 2010-01-16
Abstract
Abstract A ferroelectric liquid crystal touch panel includes a ferroelectric liquid crystal panel including counterposed electrodes and a ferroelectric liquid crystal positioned between the electrodes; a position detector for detecting a pushed position on the ferroelectric liquid crystal through the electrodes by means of an electromotive force generated when the ferroelectric liquid crystal is pushed; a display control circuit for controlling a display state of the ferroelectric liquid crystal through the electrodes; a sound generation control circuit for supplying a sound generation signal to the electrodes so that the ferroelectric liquid crystal panel generates a sound in correspondence thereto; and a selection circuit for selectively connecting the position detector, the display control circuit and the sound generation control circuit to the electrodes.
Inventors
- 👤 Masanori Fujita
- 👤 Shinichi Okamoto
- 👤 Hirokazu Ono
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 20:39
CPC Classifications
G; G06; G06F; G06F3/00; G06F3/01; G06F3/03; G06F3/041; G06F3/0412
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
82 words
A ferroelectric liquid crystal touch panel comprising: a ferroelectric liquid crystal panel including counterposed electrodes and a ferroelectric liquid crystal positioned between said electrodes; position detecting means coupled to said electrodes for detecting a pushed position on said ferroelectric liquid crystal by detecting an electromotive force generated when the ferroelectric liquid crystal is pushed; and sound generation control means coupled to supply a sound generation signal to said electrodes so that said ferroelectric liquid crystal panel generates a sound in correspondence thereto.
Claim 2
Dependent Claim
82 words
A ferroelectric liquid crystal touch panel comprising: a ferroelectric liquid crystal panel including counterposed electrodes and a ferroelectric liquid crystal positioned between said electrodes; position detecting means coupled to said electrodes for detecting a pushed position on said ferroelectric liquid crystal by detecting an electromotive force generated when the ferroelectric liquid crystal is pushed; and sound generation control means coupled to supply a sound generation signal to said electrodes so that said ferroelectric liquid crystal panel generates a sound in correspondence thereto.
Claim 3
Dependent Claim
95 words
A ferroelectric liquid crystal touch panel comprising: a ferroelectric liquid crystal panel including counterposed electrodes and a ferroelectric liquid crystal positioned between said electrodes; position detecting means for detecting a pushed position on said ferroelectric liquid crystal by detecting an electromotive force generated when the ferroelectric liquid crystal is pushed; sound generation control means for supplying a sound generation signal to said electrodes so that said ferroelectric liquid crystal panel generates a sound in correspondence thereto; and selection means for selectively connecting said position detecting means and said sound generation control means to said electrodes.
Claim 4
Dependent Claim
95 words
A ferroelectric liquid crystal touch panel comprising: a ferroelectric liquid crystal panel including counterposed electrodes and a ferroelectric liquid crystal positioned between said electrodes; position detecting means for detecting a pushed position on said ferroelectric liquid crystal by detecting an electromotive force generated when the ferroelectric liquid crystal is pushed; sound generation control means for supplying a sound generation signal to said electrodes so that said ferroelectric liquid crystal panel generates a sound in correspondence thereto; and selection means for selectively connecting said position detecting means and said sound generation control means to said electrodes.
Claim 5
Dependent Claim
37 words
A ferroelectric liquid crystal touch panel according to claim 2, wherein said selection means includes means for selectively connecting said position detecting means and said sound generation control means to said electrodes in a time sharing manner.
Claim 6
Dependent Claim
102 words
A ferroelectric liquid crystal touch panel comprising: a ferroelectric liquid crystal panel including counterposed electrodes and a ferroelectric liquid crystal positioned between said electrodes; position detecting means coupled to said electrodes for detecting a pushed position on said ferroelectric liquid crystal by detecting an electromotive force generated when the ferroelectric liquid crystal is pushed; and display control means coupled to said electrodes for controlling a display state of said ferroelectric liquid crystal through said electrodes; and sound generation control means for supplying a sound generation signal to said electrodes so that said ferroelectric liquid crystal panel generates a sound in correspondence thereto.
Claim 7
Dependent Claim
102 words
A ferroelectric liquid crystal touch panel comprising: a ferroelectric liquid crystal panel including counterposed electrodes and a ferroelectric liquid crystal positioned between said electrodes; position detecting means coupled to said electrodes for detecting a pushed position on said ferroelectric liquid crystal by detecting an electromotive force generated when the ferroelectric liquid crystal is pushed; and display control means coupled to said electrodes for controlling a display state of said ferroelectric liquid crystal through said electrodes; and sound generation control means for supplying a sound generation signal to said electrodes so that said ferroelectric liquid crystal panel generates a sound in correspondence thereto.
Claim 8
Dependent Claim
112 words
A ferroelectric liquid crystal touch panel comprising: a ferroelectric liquid crystal panel including counterposed electrodes and a ferroelectric liquid crystal positioned between said electrodes; positioned detecting means for detecting a pushed position on said ferroelectric liquid crystal by detecting an electromotive force generated when the ferroelectric liquid crystal is pushed; display control means for controlling a display state of said ferroelectric liquid crystal; sound generation control means for supplying a sound generation signal to said electrodes so that said ferroelectric liquid crystal panel generates a sound in correspondence thereto; and selection means for selectively connecting said position detecting means, said display control means and said sound generation control means to said electrodes.
Claim 9
Dependent Claim
112 words
A ferroelectric liquid crystal touch panel comprising: a ferroelectric liquid crystal panel including counterposed electrodes and a ferroelectric liquid crystal positioned between said electrodes; positioned detecting means for detecting a pushed position on said ferroelectric liquid crystal by detecting an electromotive force generated when the ferroelectric liquid crystal is pushed; display control means for controlling a display state of said ferroelectric liquid crystal; sound generation control means for supplying a sound generation signal to said electrodes so that said ferroelectric liquid crystal panel generates a sound in correspondence thereto; and selection means for selectively connecting said position detecting means, said display control means and said sound generation control means to said electrodes.
Claim 10
Dependent Claim
41 words
A ferroelectric liquid crystal touch panel according to claim 5, wherein said selection means includes means for selectively connecting said position detecting means, said display control means and said sound generation control means to said electrodes in a time sharing manner.
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) | 1995-06-16 | 1995-12-16 | 1996-06-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1999-06-16 | 1999-12-16 | 2000-06-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2003-06-16 | 2003-12-16 | 2004-06-16 | $7700.00 | Window Closed / Lapsed |