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US5737038A
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Color display system with spatial light modulator(s) having color-to-color variations in the data bit weight sequence
Assignee: Texas Instruments Inc
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Filing: 1997-02-03
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Granted: 1998-04-07
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Expires: 2017-02-03
Abstract
Abstract Methods of reducing artifacts in SLM-based display systems (10, 20), whose images are based on data displayed by bit-weight for pulse-width modulated intensity levels. A first method is suitable for systems (20) that use multiple SLMs (14) to concurrently display images of different colors, which are combined at the image plane. The data for each color are staggered in time (FIG. 4). A second method is suitable for either multiple SLM systems (20) or for systems (10) that use a single SLM (14) and a color wheel (17) to display differently colored images sequentially. The data for each color is arranged in a different data sequence (FIG. 5). In either method, the intensity transitions do not occur at the same time.
Inventors
- 👤 Richard O. Gale
- 👤 Gerhard P. Deffner
- 👤 Vishal Markandey
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 18:37
CPC Classifications
G; G09; G09G; G09G3/00; G09G3/20; G09G3/34; G09G3/3433; G09G3/346; H; H04; H04N; H04N5/00; H04N5/74; H04N5/7416; H04N5/7458; H04N9/00; H04N9/12; H04N9/31; G09G2310/00; G09G2310/02; G09G2310/0235; G09G2320/00; G09G2320/02; G09G2320/0261; G09G2320/0266; G09G3/2007; G09G3/2018; G09G3/2022; G09G5/00; G09G5/36; G09G5/39; G09G5/399; Y; Y10; Y10S; Y10S359/00; Y10S359/904
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
101 words
A method of reducing artifacts in an image display system having multiple spatial light modulators (SLMs), each SLM concurrently displaying images based on data representing a different color, comprising the steps of: determining a display sequence for data to be delivered to a first SLM, wherein said display sequence represents the order of display of different bit-weights during each frame period; repeating said determining step for data for each said SLM, such that each said SLM will receive data having a different display sequence; delivering said data of each color to the corresponding SLM; and displaying said data of each color.
Claim 2
Independent Claim
101 words
A method of reducing artifacts in an image display system having multiple spatial light modulators (SLMs), each SLM concurrently displaying images based on data representing a different color, comprising the steps of: determining a display sequence for data to be delivered to a first SLM, wherein said display sequence represents the order of display of different bit-weights during each frame period; repeating said determining step for data for each said SLM, such that each said SLM will receive data having a different display sequence; delivering said data of each color to the corresponding SLM; and displaying said data of each color.
Claim 3
Dependent Claim
27 words
The method of claim 1, further comprising the step of providing a control signal so that said repeating step is performed in response to said control signal.
Claim 4
Dependent Claim
16 words
The method of claim 1, wherein said control signal is generated by a motion detection process.
Claim 5
Dependent Claim
17 words
The method of claim 1, wherein said control signal is generated by a picture quality detection process.
Claim 6
Dependent Claim
22 words
The method of claim 1, wherein each said display sequence has sequences for split reset groups of pixel elements of said SLM.
Claim 7
Dependent Claim
20 words
The method of claim 1, wherein said repeating step is performed by determining display sequences with substantially asymmetric transition energies.
Claim 8
Independent Claim
104 words
A method of reducing artifacts in an image display system having a single spatial light modulator (SLM), that sequentially displays images based on data representing a different color via a color wheel, comprising the steps of: determining a display sequence for data of a first color, wherein said display sequence represents the order of display of different bit-weights during each frame period; repeating said determining step for data for each said color to be displayed, such that each color is represented by data having a different display sequence; delivering said data of each color to the SLM; and displaying said data of each color.
Claim 9
Independent Claim
104 words
A method of reducing artifacts in an image display system having a single spatial light modulator (SLM), that sequentially displays images based on data representing a different color via a color wheel, comprising the steps of: determining a display sequence for data of a first color, wherein said display sequence represents the order of display of different bit-weights during each frame period; repeating said determining step for data for each said color to be displayed, such that each color is represented by data having a different display sequence; delivering said data of each color to the SLM; and displaying said data of each color.
Claim 10
Dependent Claim
27 words
The method of claim 7, further comprising the step of providing a control signal so that said repeating step is performed in response to said control signal.
Claim 11
Dependent Claim
16 words
The method of claim 7, wherein said control signal is generated by a motion detection process.
Claim 12
Dependent Claim
17 words
The method of claim 7, wherein said control signal is generated by a picture quality detection process.
Claim 13
Dependent Claim
22 words
The method of claim 7, wherein each said display sequence has sequences for split reset groups of pixel elements of said SLM.
Claim 14
Dependent Claim
20 words
The method of claim 7, wherein said repeating step is performed by determining display sequences with substantially asymmetric transition energies.
References Cited (Backward Citations)
US5497172A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2001-04-06 | 2001-10-06 | 2002-04-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2005-04-06 | 2005-10-06 | 2006-04-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2009-04-06 | 2009-10-06 | 2010-04-07 | $7700.00 | Window Closed / Lapsed |