US5940142A
Expired / Lapsed
US
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Display device driving for a gray scale expression, and a driving circuit therefor
Assignee: Panasonic Holdings Corp
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Filing: 1996-11-12
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Granted: 1999-08-17
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Expires: 2016-11-12
Abstract
Abstract A display device driving for a gray scale expression, wherein at least a sub-field having the highest luminance value among plural sub-fields is further divided into a plurality of sub-field parts.
Inventors
- 👤 Takao Wakitani
- 👤 Kouichi Itsuda
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 17:46
CPC Classifications
G; G09; G09G; G09G3/00; G09G3/20; G09G3/2007; G09G3/2018; G09G3/2022; G09G3/2033; G09G3/22; G09G3/30; G09G2320/00; G09G2320/02; G09G2320/0247; G09G3/28; G09G3/288; Y; Y10; Y10S; Y10S348/00; Y10S348/91
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
86 words
A display device driving method for a gray scale expression by selectively performing emission displays of plural sub-fields with different luminance values in one field period comprising the steps of: dividing each one or more sub-fields having the highest luminance value and subsequent luminance values in descending order into a plurality of sub-field parts of said plural sub-fields; and disposing said plurality of sub-field parts in said field period separately, wherein said plurality of sub-field parts are disposed in the center portion of said field period.
Claim 2
Dependent Claim
86 words
A display device driving method for a gray scale expression by selectively performing emission displays of plural sub-fields with different luminance values in one field period comprising the steps of: dividing each one or more sub-fields having the highest luminance value and subsequent luminance values in descending order into a plurality of sub-field parts of said plural sub-fields; and disposing said plurality of sub-field parts in said field period separately, wherein said plurality of sub-field parts are disposed in the center portion of said field period.
Claim 3
Dependent Claim
148 words
A display device driving method for a gray scale expression by selectively performing emission displays of plural sub-fields with different luminance values in one field period comprising the steps of: dividing each one or more sub-fields having the highest luminance value and subsequent luminance values in descending order into a plurality of sub-field parts of said plural sub-fields; and disposing said plurality of sub-field parts in said field period separately, wherein said step of dividing comprises: dividing a sub-field having the highest luminance value into first sub-field parts of said plural sub-fields; dividing said sub-field having the second highest luminance value into second sub-field parts of said plural sub-fields; and disposing said first sub-field parts and said second sub-field parts in the center portion of said field period so that each part of said first sub-field parts and each part of said second sub-field parts are alternately disposed.
Claim 4
Dependent Claim
148 words
A display device driving method for a gray scale expression by selectively performing emission displays of plural sub-fields with different luminance values in one field period comprising the steps of: dividing each one or more sub-fields having the highest luminance value and subsequent luminance values in descending order into a plurality of sub-field parts of said plural sub-fields; and disposing said plurality of sub-field parts in said field period separately, wherein said step of dividing comprises: dividing a sub-field having the highest luminance value into first sub-field parts of said plural sub-fields; dividing said sub-field having the second highest luminance value into second sub-field parts of said plural sub-fields; and disposing said first sub-field parts and said second sub-field parts in the center portion of said field period so that each part of said first sub-field parts and each part of said second sub-field parts are alternately disposed.
Claim 5
Dependent Claim
176 words
A display device driving method for a gray scale expression by selectively performing emission displays of plural sub-fields with different luminance values in one field period comprising the steps of: dividing each one or more sub-fields having the highest luminance value and subsequent luminance values in descending order into a plurality of sub-field parts of said plural sub-fields; and disposing said plurality of sub-field parts in said field period separately, wherein said step of dividing comprises: dividing a sub-field having the highest luminance value into first sub-field parts of said plural sub-fields; dividing said sub-field having the second highest luminance value into second sub-field parts of said plural sub-fields; dividing said sub-field having the third highest luminance value into third sub-field parts of said plural sub-fields; and disposing said first sub-field parts, said second sub-field parts, and said third sub-field parts in the center portion of said field period so that each part of said first sub-field parts, each part of said second sub-field parts, and each part of said third sub-field parts are continuously disposed.
Claim 6
Dependent Claim
176 words
A display device driving method for a gray scale expression by selectively performing emission displays of plural sub-fields with different luminance values in one field period comprising the steps of: dividing each one or more sub-fields having the highest luminance value and subsequent luminance values in descending order into a plurality of sub-field parts of said plural sub-fields; and disposing said plurality of sub-field parts in said field period separately, wherein said step of dividing comprises: dividing a sub-field having the highest luminance value into first sub-field parts of said plural sub-fields; dividing said sub-field having the second highest luminance value into second sub-field parts of said plural sub-fields; dividing said sub-field having the third highest luminance value into third sub-field parts of said plural sub-fields; and disposing said first sub-field parts, said second sub-field parts, and said third sub-field parts in the center portion of said field period so that each part of said first sub-field parts, each part of said second sub-field parts, and each part of said third sub-field parts are continuously disposed.
Claim 7
Dependent Claim
204 words
A display device driving method for a gray scale expression by selectively performing emission displays of plural sub-fields with different luminance values in one field period comprising the steps of; dividing each one or more sub-fields having the highest luminance value and subsequent luminance values in descending order into a plurality of sub-field parts of said plural sub-fields; and disposing said plurality of sub-field parts in said field period separately, wherein said step of dividing comprises: dividing a sub-field having the highest luminance value into first sub-field parts of said plural sub-fields; dividing said sub-field having the second highest luminance value into second sub-field parts of said plural sub-fields; dividing said sub-field having the third highest luminance value into third sub-field parts of said plural sub-fields; dividing said sub-field having the fourth highest luminance value into fourth sub-field parts of said plural sub-fields; and disposing said first sub-field parts, said second sub-field parts, said third sub-field parts, and said fourth sub-field parts in the center portion of said field period so that each part of said first sub-field parts, each part of said second sub-field parts, each part of said third sub-field parts, and each part of said fourth sub-field parts are continuously disposed.
Claim 8
Dependent Claim
204 words
A display device driving method for a gray scale expression by selectively performing emission displays of plural sub-fields with different luminance values in one field period comprising the steps of; dividing each one or more sub-fields having the highest luminance value and subsequent luminance values in descending order into a plurality of sub-field parts of said plural sub-fields; and disposing said plurality of sub-field parts in said field period separately, wherein said step of dividing comprises: dividing a sub-field having the highest luminance value into first sub-field parts of said plural sub-fields; dividing said sub-field having the second highest luminance value into second sub-field parts of said plural sub-fields; dividing said sub-field having the third highest luminance value into third sub-field parts of said plural sub-fields; dividing said sub-field having the fourth highest luminance value into fourth sub-field parts of said plural sub-fields; and disposing said first sub-field parts, said second sub-field parts, said third sub-field parts, and said fourth sub-field parts in the center portion of said field period so that each part of said first sub-field parts, each part of said second sub-field parts, each part of said third sub-field parts, and each part of said fourth sub-field parts are continuously disposed.
Claim 9
Dependent Claim
145 words
A display device driving method for a gray scale expression by selectively performing emission displays of plural sub-fields with different luminance values in one field period comprising the steps of: dividing said sub-field having the highest luminance value into first sub-field parts of said plural sub-fields; dividing said sub-field having the second highest luminance value into second sub-field parts of said plural sub-fields; dividing said sub-field having the third highest luminance value into third sub-field parts of said plural sub-fields; dividing said sub-field having the fourth highest luminance value into fourth sub-field parts of said plural sub-fields; and disposing said first sub-field parts, said second sub-field parts, said third sub-field parts, and said fourth sub-field parts in both end portions of said field period, and disposing sub-fields which are not divided into said plurality of sub-field parts in the center portion of said field period.
Claim 10
Dependent Claim
145 words
A display device driving method for a gray scale expression by selectively performing emission displays of plural sub-fields with different luminance values in one field period comprising the steps of: dividing said sub-field having the highest luminance value into first sub-field parts of said plural sub-fields; dividing said sub-field having the second highest luminance value into second sub-field parts of said plural sub-fields; dividing said sub-field having the third highest luminance value into third sub-field parts of said plural sub-fields; dividing said sub-field having the fourth highest luminance value into fourth sub-field parts of said plural sub-fields; and disposing said first sub-field parts, said second sub-field parts, said third sub-field parts, and said fourth sub-field parts in both end portions of said field period, and disposing sub-fields which are not divided into said plurality of sub-field parts in the center portion of said field period.
Claim 11
Dependent Claim
146 words
A display device driving method for a gray scale expression by selectively performing emission displays of plural sub-fields with different luminance values in one field period comprising the steps of: dividing said sub-field having the highest luminance value into first sub-field parts of said plural sub-fields; dividing said sub-field having the second highest luminance value into second sub-field parts of said plural sub-fields; dividing said sub-field having the third highest luminance value into third sub-field parts of said plural sub-fields; dividing said sub-field having the fourth highest luminance value into fourth sub-field parts of said plural sub-fields; and disposing said first sub-field parts, said second sub-field parts, said third sub-field parts, and said fourth sub-field parts asymmetrically in both end portions of said field period, and disposing sub-fields which are not divided into said plurality of sub-field parts in the center portion of said field period.
Claim 12
Dependent Claim
146 words
A display device driving method for a gray scale expression by selectively performing emission displays of plural sub-fields with different luminance values in one field period comprising the steps of: dividing said sub-field having the highest luminance value into first sub-field parts of said plural sub-fields; dividing said sub-field having the second highest luminance value into second sub-field parts of said plural sub-fields; dividing said sub-field having the third highest luminance value into third sub-field parts of said plural sub-fields; dividing said sub-field having the fourth highest luminance value into fourth sub-field parts of said plural sub-fields; and disposing said first sub-field parts, said second sub-field parts, said third sub-field parts, and said fourth sub-field parts asymmetrically in both end portions of said field period, and disposing sub-fields which are not divided into said plurality of sub-field parts in the center portion of said field period.
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) | 2002-08-16 | 2003-02-15 | 2003-08-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2006-08-16 | 2007-02-15 | 2007-08-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2010-08-16 | 2011-02-15 | 2011-08-17 | $7700.00 | Window Closed / Lapsed |