Patent US4873398A successfully refreshed from Google Patents.
US4873398A
Expired / Lapsed
US
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Flat panel display with integrated digitizing tablet
Assignee: HP Inc
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Filing: 1988-06-30
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Granted: 1989-10-10
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Expires: 2008-06-30
Abstract
Abstract A novel flat panel display is provided which allows for very precise and reliable detection of the location of the cursor with respect to the displayed image. Parallax problems are eliminated by focusing the displayed image on a panel by projecting the image through the panel. The location of the stylus is accurately determined, in one embodiment, utilizing prior art digitizing techniques together with the use of an erect, unity magnification imaging lens array for displaying the projected image. In another embodiment of this invention, accurate determination of the location of the stylus with respect to the displayed image is provided by causing the stylus to feed signals, for example optical signals, through a significant portion of the optical path used for displaying the image.
Inventors
- 👤 Laurence M. Hubby, Jr.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 15:22
CPC Classifications
G; G06; G06F; G06F3/00; G06F3/01; G06F3/03; G06F3/041; G06F3/0416; G06F3/0418
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
24 words
A flat panel display comprising: a screen; means for projecting an image; and a substantially thin lens for focusing said image on said screen.
Claim 2
Dependent Claim
24 words
A flat panel display comprising: a screen; means for projecting an image; and a substantially thin lens for focusing said image on said screen.
Claim 3
Dependent Claim
19 words
A flat panel display as in claim 1 wherein said lens comprises an erect unity magnification imaging lens array.
Claim 4
Dependent Claim
27 words
A flat panel display as in claim 1 further comprising means for determining the position of a stylus when said stylus is placed adjacent to said screen.
Claim 5
Dependent Claim
16 words
A flat panel display as in claim 3 wherein said means for determining comprises a digitizer.
Claim 6
Dependent Claim
19 words
A flat panel display as in claim 4 wherein said digitizer is either an electrostatic or an electromagnetic digitizer.
Claim 7
Dependent Claim
25 words
A flat panel display as in claim 3 wherein said means for determining comprises an imaging device which receives a position signal from said stylus.
Claim 8
Dependent Claim
26 words
A flat panel display as in claim 6 wherein said position signal is transmitted to said imaging device through said erect unity magnification imaging lens array.
Claim 9
Dependent Claim
52 words
A display comprising: a screen; means for projecting an image; means for focusing said image on said screen; means for determining the position of a stylus when said stylus emits a position signal when placed adjacent to said screen, said means for determining comprising an image device for receiving said position signal.
Claim 10
Dependent Claim
52 words
A display comprising: a screen; means for projecting an image; means for focusing said image on said screen; means for determining the position of a stylus when said stylus emits a position signal when placed adjacent to said screen, said means for determining comprising an image device for receiving said position signal.
Claim 11
Dependent Claim
19 words
A display as in claim 8 wherein said image device receives said position signal through said means for focusing.
Claim 12
Dependent Claim
22 words
A display as in claim 7 or 9 wherein said position signal is distinguishable from said image by wavelength, modulation, or polarization.
Claim 13
Dependent Claim
17 words
A display as in claim 10 further comprising means for separating said position signal from said image.
Claim 14
Dependent Claim
14 words
A display as in claim 11 wherein said means for separating comprises a beamsplitter.
Claim 15
Dependent Claim
74 words
An interactive computer terminal comprising: a translucent work surface having a front and back; means for projecting an image from the back of the work surface to the front of the work surface so as to focus the image on the front of the work surface; indicator means producing a signal for use on the front of the work surface by an operator; and means for receiving the signal produced by the indicator means.
Claim 16
Dependent Claim
74 words
An interactive computer terminal comprising: a translucent work surface having a front and back; means for projecting an image from the back of the work surface to the front of the work surface so as to focus the image on the front of the work surface; indicator means producing a signal for use on the front of the work surface by an operator; and means for receiving the signal produced by the indicator means.
Claim 17
Dependent Claim
115 words
An interactive computer terminal for outputting information to an operator and inputting information from the operator, comprising: a translucent work surface having a front and back; means for projecting an image, containing the information to be outputted, from the back of the work surface to the front of the work surface so as to focus the image on the front of the work surface to be viewed by the operator; indicator means producing a signal for use on the front of the work surface by an operator so as to indicate information to be inputted; and means for receiving the signal produced by the indicator means so as to produce the information to be inputted.
Claim 18
Dependent Claim
115 words
An interactive computer terminal for outputting information to an operator and inputting information from the operator, comprising: a translucent work surface having a front and back; means for projecting an image, containing the information to be outputted, from the back of the work surface to the front of the work surface so as to focus the image on the front of the work surface to be viewed by the operator; indicator means producing a signal for use on the front of the work surface by an operator so as to indicate information to be inputted; and means for receiving the signal produced by the indicator means so as to produce the information to be inputted.
References Cited (Backward Citations)
US4679909A
Cited
US4760389A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1992-10-09 | 1993-04-10 | 1993-10-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-10-09 | 1997-04-10 | 1997-10-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-10-09 | 2001-04-10 | 2001-10-10 | $7700.00 | Window Closed / Lapsed |