US5162782A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Display device with coordinate input function
Assignee: Mitsubishi Electric Corp
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Filing: 1990-04-30
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Granted: 1992-11-10
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Expires: 2010-04-30
Abstract
Abstract In a display device with coordinate input function according to the invention, since transparent electrodes for inputting coordinates, are disposed in an X-Y matrix form on a compensation cell provided to a liquid crystal display panel of two-layer type, the coordinate input can be performed even in the case of employing a liquid crystal display panel divided into two, upper and lower parts to drive its display screen.
Inventors
- 👤 Kazuo Yoshioka
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 14:11
CPC Classifications
G; G06; G06F; G06F3/00; G06F3/01; G06F3/03; G06F3/041; G06F3/0416; G06F3/0418; G06F3/04184
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
103 words
A display device with coordinate input function having a liquid crystal display panel for both displaying images and inputting coordinates, comprising: a sensor means for sensing coordinate input detection signals from a control means; a liquid crystal display panel of two-layer type including an optical phase liquid crystal compensation cell as a first layer of the liquid crystal display panel and a liquid crystal display cell as a second layer of the liquid crystal display panel; and a plurality of transparent electrodes arranged on said compensation cell in an X-Y matrix form, for inputting the coordinate input detection signals to said sensor means.
Claim 2
Dependent Claim
103 words
A display device with coordinate input function having a liquid crystal display panel for both displaying images and inputting coordinates, comprising: a sensor means for sensing coordinate input detection signals from a control means; a liquid crystal display panel of two-layer type including an optical phase liquid crystal compensation cell as a first layer of the liquid crystal display panel and a liquid crystal display cell as a second layer of the liquid crystal display panel; and a plurality of transparent electrodes arranged on said compensation cell in an X-Y matrix form, for inputting the coordinate input detection signals to said sensor means.
Claim 3
Dependent Claim
36 words
A display device with coordinate input function as set forth in claim 1, wherein an image display screen of the liquid crystal display panel of two-layer type is divided into plural areas to be separately driven.
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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) | 1995-11-10 | 1996-05-11 | 1996-11-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1999-11-10 | 2000-05-11 | 2000-11-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2003-11-10 | 2004-05-11 | 2004-11-10 | $7700.00 | Window Closed / Lapsed |