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US5490009A
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Enhanced resolution for digital micro-mirror displays
Assignee: Texas Instruments Inc
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Filing: 1994-10-31
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Granted: 1996-02-06
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Expires: 2014-10-31
Abstract
Abstract A display system (20) that uses multiple SLMs (25) to enhance horizontal or vertical resolution, or both. For example, to approximate a two-fold increase in horizontal resolution, the input data is sampled at a doubled rate, and each SLM (25) receives every other sample. Each SLM (25) generates an image, and the two images are partially superposed with a horizontal offset and simultaneously displayed. The resulting output image has a perceived resolution that approximates that of an image generated by an SLM with twice as many pixels per row.
Inventors
- 👤 Vadlamannati Venkateswar
- 👤 William E. Nelson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 13:06
CPC Classifications
H; H04; H04N; H04N5/00; H04N5/74; H04N5/7416; H04N5/7458; G; G02; G02B; G02B26/00; G02B26/08; G02B26/0816; G02B26/0833; G02B26/0841
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
78 words
A method of enhancing the horizontal resolution of a spatial light modulator (SLM)-based display system, comprising the steps of: receiving sampled image data to a number, n, of SLMs, such that every nth SLM receives data representing every nth sample; focusing said SLMs to an image plane, such that each of said SLMs generate a sub-image wherein said sub-images are partially superposed with a horizontal offset from each other; and simultaneously displaying said sub-images to form an image.
Claim 2
Independent Claim
78 words
A method of enhancing the horizontal resolution of a spatial light modulator (SLM)-based display system, comprising the steps of: receiving sampled image data to a number, n, of SLMs, such that every nth SLM receives data representing every nth sample; focusing said SLMs to an image plane, such that each of said SLMs generate a sub-image wherein said sub-images are partially superposed with a horizontal offset from each other; and simultaneously displaying said sub-images to form an image.
Claim 3
Dependent Claim
21 words
The method of claim 1, wherein said steps are performed with two SLMs for approximating a two-fold increase in horizontal resolution.
Claim 4
Dependent Claim
12 words
The method of claim 1, wherein said SLMs are digital micro-mirror devices.
Claim 5
Dependent Claim
27 words
The method of claim 1, wherein said focussing step is performed with offsets of approximately 1/n the center-to-center horizontal spacing of the pixel elements of said SLMs.
Claim 6
Dependent Claim
15 words
The method of claim 1, wherein said SLMs have pixel elements that are substantially square.
Claim 7
Independent Claim
81 words
A method of enhancing the vertical resolution of a spatial light modulator (SLM)-based display system, comprising the steps of: receiving rows of image data to a number, n, of SLMs, such that every nth SLM receives data representing every nth row of samples; focusing said SLMs to an image plane, such that each of said SLMs generate a sub-image wherein said sub-images are partially superposed with a vertical offset from each other; and simultaneously displaying said sub-images to form an image.
Claim 8
Independent Claim
81 words
A method of enhancing the vertical resolution of a spatial light modulator (SLM)-based display system, comprising the steps of: receiving rows of image data to a number, n, of SLMs, such that every nth SLM receives data representing every nth row of samples; focusing said SLMs to an image plane, such that each of said SLMs generate a sub-image wherein said sub-images are partially superposed with a vertical offset from each other; and simultaneously displaying said sub-images to form an image.
Claim 9
Dependent Claim
21 words
The method of claim 6, wherein said steps are performed with two SLMs for approximating a two-fold increase in vertical resolution.
Claim 10
Dependent Claim
12 words
The method of claim 6, wherein said SLMs are digital micro-mirror devices.
Claim 11
Dependent Claim
27 words
The method of claim 6, wherein said focussing step is performed with offsets of approximately 1/n the center-to-center vertical spacing of the pixel elements of said SLMs.
Claim 12
Dependent Claim
15 words
The method of claim 6, wherein said SLMs have pixel elements that are substantially square.
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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) | 1999-02-05 | 1999-08-07 | 2000-02-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2003-02-05 | 2003-08-07 | 2004-02-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2007-02-05 | 2007-08-07 | 2008-02-06 | $7700.00 | Window Closed / Lapsed |