Patent US5465103A successfully refreshed from Google Patents.
US5465103A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Display device with coordinate input function
Assignee: Mitsubishi Electric Corp
•
Filing: 1992-09-03
•
Granted: 1995-11-07
•
Expires: 2012-09-03
Abstract
Abstract A display device with coordinate input function with transparent electrodes for inputting coordinates disposed in an X-Y matrix form on an optical phase compensation cell, such as an optically anisotropic phase compensation film, provided for a liquid crystal display panel of two-layer type. Coordinate input can be performed even in the case of a liquid crystal display panel divided into two, upper and lower, separately driven parts to increase the resolution of the display screen, because of the transparent electrodes disposed on the optical phase compensation cell.
Inventors
- 👤 Kazuo Yoshioka
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 13:30
CPC Classifications
G; G06; G06F; G06F3/00; G06F3/01; G06F3/03; G06F3/041; G06F3/0416; G06F3/0418; G06F3/04184
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
114 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 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, wherein said compensation cell is a phase compensation film which exhibits optical anisotropy.
Claim 2
Dependent Claim
114 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 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, wherein said compensation cell is a phase compensation film which exhibits optical anisotropy.
Claim 3
Dependent Claim
34 words
The display device with coordinate input function having a liquid crystal display panel for both displaying images and inputting coordinates as in claim 1, wherein said optically anisotropic phase compensation film comprises a polycarbonate.
Claim 4
Dependent Claim
35 words
The display device with coordinate input function having a liquid crystal display panel for both displaying images and inputting coordinates as in claim 1, wherein said optically anisotropic phase compensation film comprises a polyvinyl alcohol.
Claim 5
Dependent Claim
35 words
The display device with coordinate input function having a liquid crystal display panel for both displaying images and inputting coordinates as in claim 1, wherein said optically anisotropic phase compensation film comprises a polyethylene tetraphthalate.
Claim 6
Dependent Claim
43 words
The display device with coordinate input function having a liquid crystal display panel for both displaying images and inputting coordinates as in claim 1, wherein said optically anisotropic phase compensation film has a thickness of between about 50 micrometers to about 150 micrometers.
Claim 7
Dependent Claim
38 words
The display device with coordinate input function having a liquid crystal display panel for both displaying images and inputting coordinates as in claim 1, wherein said optically anisotropic phase compensation film has a thickness of about 100 micrometers.
References Cited (Backward Citations)
US4231640A
Cited
US4375317A
Cited
US4449123A
Cited
FR2557341A1
Cited
GB2156133A
Cited
DE3533869A1
Cited
US4890096A
Cited
US4704501A
Cited
JPS61262835A
Cited
FR2595157A1
Cited
JPS6358321A
Cited
JPS6381521A
Cited
US4841290A
Cited
US4944577A
Cited
US5082353A
Cited
JPH01304423A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1998-11-06 | 1999-05-08 | 1999-11-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2002-11-06 | 2003-05-08 | 2003-11-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2006-11-06 | 2007-05-08 | 2007-11-07 | $7700.00 | Window Closed / Lapsed |