US6310591B1
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Spatial-temporal multiplexing for high bit-depth resolution displays
Assignee: Texas Instruments Inc
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Filing: 1999-08-09
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Granted: 2001-10-30
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Expires: 2019-08-09
Abstract
Abstract A method and apparatus for spatially and temporally multiplexing display data. The use of this method results in a bit-depth resolution higher than that achievable by the system given a number of bits of resolution. The method includes the steps of determining the desired perceived resolution ( 26 ), establishing the number of bit-planes to be used to achieve that perceived resolution ( 28 ), using at least one of those bit-planes for spatial-temporal least significant bit values (STMLSBs) ( 30 ), referencing the developed values of the STMLSBs to fractional bit gray code levels ( 32 ), developing spatial patterns ( 34 ), determining whether the spatial patterns will start in a predetermined sequence or randomly from frame-to-frame ( 36 ), loading the data onto the modulator and displaying it ( 38 ). The apparatus includes a random number generator ( 48 ) and a look up table ( 50 ) to enable the choice between random and predetermined spatial patterns, and pattern logic ( 46 ), which produces the pattern to be used.
Inventors
- 👤 Daniel J. Morgan
- 👤 Gregory S. Pettitt
- 👤 Donald B. Doherty
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 11:34
CPC Classifications
G; G02; G02F; G02F1/00; G02F1/01; G02F1/015; G09; G09G; G09G3/00; G09G3/20; G09G3/2007; G09G3/2044; G09G3/2051; G09G3/2055; G09G3/34; G09G2320/00; G09G2320/02; G09G2320/0271; G09G2320/0276; G09G2340/00; G09G2340/04; G09G2340/0407; G09G2340/0428; G09G3/2018; G09G3/2022; G09G3/2037; G09G3/3433; G09G3/346
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
144 words
A method of display high bit-depth resolution images on a spatial light modulator, comprising the steps of: a. determining a number of bits of resolution to be displayed; b. establishing a number of bit planes to be loaded in each frame for each color; c. reserving a predetermined number of least significant bits (LSBs) of the number of bit planes to achieve the number of bits of resolution to be displayed; d. defining reference numbers to provide fractional bits; e. developing a set of spatial patterns to be used with each of said predetermined number of LSBs for each said fractional bits; f. selecting one of either random spatial placement of the patterns or predetermined placement of the patterns to display said patterns at the start of each frame; and g. determining one of said patterns for each pixel according to said pixel's intensity.
Claim 2
Independent Claim
144 words
A method of display high bit-depth resolution images on a spatial light modulator, comprising the steps of: a. determining a number of bits of resolution to be displayed; b. establishing a number of bit planes to be loaded in each frame for each color; c. reserving a predetermined number of least significant bits (LSBs) of the number of bit planes to achieve the number of bits of resolution to be displayed; d. defining reference numbers to provide fractional bits; e. developing a set of spatial patterns to be used with each of said predetermined number of LSBs for each said fractional bits; f. selecting one of either random spatial placement of the patterns or predetermined placement of the patterns to display said patterns at the start of each frame; and g. determining one of said patterns for each pixel according to said pixel's intensity.
Claim 3
Dependent Claim
16 words
The method of claim 1 wherein said selecting step selects a random placement of the patterns.
Claim 4
Dependent Claim
16 words
The method of claim 1 wherein said selecting step selects a predetermined placement of the patterns.
Claim 5
Dependent Claim
20 words
The method of claim 1 wherein said method further includes mapping said reference numbers to combinations of said spatial patterns.
Claim 6
Independent Claim
122 words
An apparatus operable to generate patterns for high bit-depth resolution displays, comprising: a. pattern generation logic operable to receive signals that indicate initiation of pattern generation and to generate spatially and temporally multiplexed patterns; b. a random number generator operable to provide said pattern generation logic with a random number to indicate the spatial start of said patterns; c. a programmable look-up table operable to store spatial phases to be selected based upon said patterns received from said pattern generation logic; d. a circuit operable to generate fractional codes; and e. logic to select specific ones of said spatially and temporally multiplexed patterns based upon outputs from said pattern generation logic, outputs from said programmable look up table, and said fractional codes.
Claim 7
Independent Claim
122 words
An apparatus operable to generate patterns for high bit-depth resolution displays, comprising: a. pattern generation logic operable to receive signals that indicate initiation of pattern generation and to generate spatially and temporally multiplexed patterns; b. a random number generator operable to provide said pattern generation logic with a random number to indicate the spatial start of said patterns; c. a programmable look-up table operable to store spatial phases to be selected based upon said patterns received from said pattern generation logic; d. a circuit operable to generate fractional codes; and e. logic to select specific ones of said spatially and temporally multiplexed patterns based upon outputs from said pattern generation logic, outputs from said programmable look up table, and said fractional codes.
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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) | 2004-10-29 | 2005-04-30 | 2005-10-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2008-10-29 | 2009-04-30 | 2009-10-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2012-10-29 | 2013-04-30 | 2013-10-30 | $7700.00 | Window Closed / Lapsed |