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US4885574A
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Display and keyboard panel
Assignee: Texas Instruments Inc
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Filing: 1989-03-22
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Granted: 1989-12-05
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Expires: 2009-03-22
Abstract
Abstract A display and keyboard panel for an electronic device such as a handheld or desktop calculator, the panel having a keyboard area and an indication area located in the vicinity of the keyboard area. The indication area has a plurality of key sections each having at least two component areas each for indicating a single piece of information. Each of the key sections is typically formed by a touch sensor switch area having at least two adjacent areas corresponding respectively to the aforesaid component areas, each of the adjacent areas of the touch sensor switch area including at least one segment or plural segments of a conductor.
Inventors
- 👤 Hidetaka Negishi
- 👤 Shigemitsu Aoki
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 02:55
CPC Classifications
G; G06; G06F; G06F15/00; G06F15/02; G06F15/0225; G06F3/00; G06F3/01; G06F3/02; G06F3/023; G06F3/0238
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
154 words
An electronic device having a display and keyboard panel comprising: said electronic device having saiddisplay area and said keyboard area; said keyboard area having said plurality of switches, each of said first plurality of switches providing a constant input to said electronic device and providing a visual indication at each of said first plurality of switches of the function thereof represented by said constant input, said display area being responsive to said first plurality of switches to provide an indication thereon responsive to the switch being actuated; and an indication area located adjacent said keyboard area having a second plurality of switches uniquely responsive to each of plural mode settings of said electronic device to provide different variable inputs to said electronic device for each of said plural mode settings and to provide at each of said second plurality of switches a visual display of the current function thereof represented by said variable input.
Claim 2
Dependent Claim
154 words
An electronic device having a display and keyboard panel comprising: said electronic device having saiddisplay area and said keyboard area; said keyboard area having said plurality of switches, each of said first plurality of switches providing a constant input to said electronic device and providing a visual indication at each of said first plurality of switches of the function thereof represented by said constant input, said display area being responsive to said first plurality of switches to provide an indication thereon responsive to the switch being actuated; and an indication area located adjacent said keyboard area having a second plurality of switches uniquely responsive to each of plural mode settings of said electronic device to provide different variable inputs to said electronic device for each of said plural mode settings and to provide at each of said second plurality of switches a visual display of the current function thereof represented by said variable input.
Claim 3
Dependent Claim
22 words
The electronic device as set forth in claim 1, wherein each of the second plurality of switches comprises a touch sensor switch.
Claim 4
Dependent Claim
21 words
The electronic device as set forth in claim 2, wherein each of said touch sensor switches includes a liquid crystal display.
Claim 5
Dependent Claim
35 words
The electronic device as set forth in claim 1, wherein the display area comprises a liquid crystal display, and wherein each of the first and second plurality of switches comprises a liquid crystal display structure.
Claim 6
Dependent Claim
31 words
The electronic device as set forth in claim 4, wherein the first plurality of switches defines arithmetic and instruction key sections, and the second plurality of switches defines function indicator switches.
Claim 7
Dependent Claim
24 words
The electronic device as set forth in claim 5, wherein each of the first and second plurality of switches comprises a touch sensor switch.
Claim 8
Dependent Claim
18 words
The electronic device as set forth in claim 1 further including switch means to provide said mode settings.
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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) | 1992-12-04 | 1993-06-05 | 1993-12-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-12-04 | 1997-06-05 | 1997-12-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-12-04 | 2001-06-05 | 2001-12-05 | $7700.00 | Window Closed / Lapsed |