US5654741A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Spatial light modulator display pointing device
Assignee: Sony Corp
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Filing: 1995-12-05
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Granted: 1997-08-05
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Expires: 2015-12-05
Abstract
Abstract A display system with a pointer that is not restricted by wires or sensors. The display uses a spatial light modulator (14) for projecting an image on the screen (20). During a time period when all of the cells of the modulator (14) are in the same state, a cursor projected onto the screen by the pointer is reimaged from the screen to a detector (26), which translates the cursor image into signals for a central processing unit (38). The central processing unit (38) then directs the system as to what tasks are being dictated by the cursor.
Inventors
- 👤 Jeffrey B. Sampsell
- 👤 Toshio Shionoya
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 17:05
CPC Classifications
G; G01; G01D; G01D5/00; G01D5/26; G06; G06F; G06F3/00; G06F3/01; G06F3/03; G06F3/033; G06F3/038; G06F3/0386; G06F3/041; G06F3/042
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
150 words
A display system comprising: a. a light source; b. a digital micromirror device comprising an array of mirrors for receiving said light from said source and projecting an image to said screen by deflecting selected ones of said array of mirrors to form and image on said screen; c. a screen for displaying said image; d. a pointer for generating a cursor image and projecting said cursor image on said screen, such that said cursor image can be reimaged from said screen to said digital micromirror device; e. a detector for receiving said cursor image from said digital micromirror device when said digital micromirror device has been addressed such that all of said array of mirrors are in the OFF position, and for converting said cursor image into an electronic signal; and f. a central processing unit for receiving said electronic signal and performing any tasks dictated by said signal.
Claim 2
Dependent Claim
150 words
A display system comprising: a. a light source; b. a digital micromirror device comprising an array of mirrors for receiving said light from said source and projecting an image to said screen by deflecting selected ones of said array of mirrors to form and image on said screen; c. a screen for displaying said image; d. a pointer for generating a cursor image and projecting said cursor image on said screen, such that said cursor image can be reimaged from said screen to said digital micromirror device; e. a detector for receiving said cursor image from said digital micromirror device when said digital micromirror device has been addressed such that all of said array of mirrors are in the OFF position, and for converting said cursor image into an electronic signal; and f. a central processing unit for receiving said electronic signal and performing any tasks dictated by said signal.
Claim 3
Dependent Claim
17 words
The display system of claim 1 wherein said cursor image is of light in the ultraviolet range.
Claim 4
Dependent Claim
17 words
The display system of claim 1 wherein said cursor image is of light in the infrared range.
Claim 5
Dependent Claim
22 words
The display system of claim 1 wherein said cursor image is of light in the visible range pulsed at a certain rate.
Claim 6
Dependent Claim
22 words
The detector of claim 1 wherein said detector includes a filter operable to filter one of AM, FM and pulse modulated frequencies.
Claim 7
Dependent Claim
13 words
The detector of claim 1 wherein said detector comprises at least one photodiode.
Claim 8
Dependent Claim
12 words
The detector of claim 1 wherein said detector comprises a CCD array.
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) | 2000-08-04 | 2001-02-03 | 2001-08-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2004-08-04 | 2005-02-03 | 2005-08-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2008-08-04 | 2009-02-03 | 2009-08-05 | $7700.00 | Window Closed / Lapsed |