US6104362A
Expired / Lapsed
US
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Panel display in which the number of sustaining discharge pulses is adjusted according to the quantity of display data, and a driving method for the panel display
Assignee: Maxell Ltd
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Filing: 1999-07-21
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Granted: 2000-08-15
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Expires: 2019-07-21
Abstract
Abstract A panel display has a display panel including a plurality of cells to be selectively discharged to an address driver for setting the plurality of cells to states represented by display data. The panel display also has a display glowing driver for enabling the plurality of cells to glow according to the set states. One frame during which one screen is displayed has a plurality of sub-frames and glowing periods within the sub-frames, during which the display cells are enabled to glow by the display glowing driver. The said sub-frames are weighted in order to achieve gray-scale display. The display panel also has a display load calculating circuit for calculating a display load to be imposed on a whole display surface during each sub-frame. In addition, a corrected period calculating circuit calculates a corrected period of a glowing period, during which the display cells are enabled to glow by the display glowing driver according to display loads to be imposed during each sub-frame. This is calculated by the display load calculating circuit so that brightness attained by the display cells during respective sub-frames will be maintained at a given ratio.
Inventors
- 👤 Hirohito Kuriyama
- 👤 Masaya Tajima
- 👤 Toshio Ueda
- 👤 Katsuhiro Ishida
- 👤 Akira Yamamoto
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 11:29
CPC Classifications
G; G09; G09G; G09G3/00; G09G3/20; G09G3/22; G09G3/28; G09G3/288; G09G3/291; G09G3/294; G09G3/2944; G09G3/292; G09G3/2927; G09G3/293; G09G3/2932; G09G3/2946; G09G3/296; G09G3/297; G09G3/298; G09G2320/00; G09G2320/02; G09G2320/0223; G09G2320/0233; G09G2320/06; G09G2320/0626; G09G2360/00; G09G2360/16
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
185 words
A panel display comprising: a display panel including a plurality of cells to be selectively discharged to glow an address driver for setting said plurality of cells to states represented by display data, a display glowing driver for enabling said plurality of cells to glow according to said set states, one frame during which one screen is displayed, said frame having a plurality of sub-frames and glowing periods within said sub-frames, during which said display cells are enabled to glow by said display glowing driver, said sub-frames being weighted in order to achieve gray-scale display a display load for each sub-frame calculating circuit for calculating a display load to be imposed on a whole display surface during each sub-frame; and a corrected period calculating circuit for calculating a corrected period of a glowing period, during which said display cells are enabled to glow by said display glowing driver, according to display load to be imposed during each sub-frame, which is calculated by said display load calculating circuit, so that brightness attained by said display cells during respective sub-frames will be maintained at a given ratio.
Claim 2
Dependent Claim
185 words
A panel display comprising: a display panel including a plurality of cells to be selectively discharged to glow an address driver for setting said plurality of cells to states represented by display data, a display glowing driver for enabling said plurality of cells to glow according to said set states, one frame during which one screen is displayed, said frame having a plurality of sub-frames and glowing periods within said sub-frames, during which said display cells are enabled to glow by said display glowing driver, said sub-frames being weighted in order to achieve gray-scale display a display load for each sub-frame calculating circuit for calculating a display load to be imposed on a whole display surface during each sub-frame; and a corrected period calculating circuit for calculating a corrected period of a glowing period, during which said display cells are enabled to glow by said display glowing driver, according to display load to be imposed during each sub-frame, which is calculated by said display load calculating circuit, so that brightness attained by said display cells during respective sub-frames will be maintained at a given ratio.
Claim 3
Dependent Claim
64 words
A panel display according to claim 1, wherein said corrected period calculating circuit calculates a corrected period of a glowing period within each sub-frame, during which said display cells are enabled to glow by said display glowing driver, so that a brightness to be attained will be matched with the one permitted by a display load having a maximum value within a variation range.
Claim 4
Dependent Claim
73 words
A panel display according to claim 1, wherein said corrected period calculating circuit calculates a corrected period of a glowing period, during which said display cells are enabled to glow by said display glowing driver, so that a brightness to be attained will be matched with the one attained with imposition of the same display load as the one to be imposed during a sub-frame to which the largest display load is allotted.
Claim 5
Dependent Claim
77 words
A panel display according to claim 1, wherein said corrected period calculating circuit calculates a weighted mean of display loads to be imposed during sub-frames in consideration of said weighting, and calculates a corrected period of a glowing period, during which said display cells are enabled to glow by said display glowing driver, so that a brightness to be attained will be matched with the one attained with imposition of a display load of said weighted mean.
Claim 6
Dependent Claim
71 words
A panel display according to claim 4, wherein: said corrected period calculating circuit includes a judging circuit for judging if a total sum of calculated corrected periods of glowing periods, during which said display cells are enabled to glow by said display glowing driver, exceeds a given length; and when said total sum exceeds said given length, correction is made so that said total sum will equal to said given length.
Claim 7
Dependent Claim
70 words
A panel display according to claim 1, wherein said corrected period calculating circuit calculates a median of display loads to be imposed during sub-frames, and calculates a corrected period of a glowing period, during which said display cells are enabled to glow by said display glowing driver, so that a brightness to be attained will be matched with the one attained with imposition of a display load of said median.
Claim 8
Dependent Claim
66 words
A panel display according to claim 1, wherein: said display load calculating circuit calculates display loads to be imposed during sub-frames associated with large weights and represented by high-order bits; and said corrected period calculating circuit calculates a corrected period on the assumption that a given display load is imposed during any sub-frame other than said sub-frames associated with large weights and represented by high-order bits.
Claim 9
Dependent Claim
170 words
A driving method for a display panel having a plurality of cells to be selectively discharged to glow, and a frame during which one screen is displayed and is composed of a plurality of sub-frames, each sub-frame including an addressing period during which said plurality of cells are set to states represented by display data, and a display glowing period during which said plurality of cells are enabled to glow according to said set states, said display glowing periods each being weighted in order to achieve gray-scale display, said driving method comprising: a display load for each sub-frame calculating step of calculating a display load to be imposed on a whole display surface each sub-frame; and a corrected period calculating step of calculating a corrected period of said display glowing period within each sub-frame according to a display load to be imposed on each sub-frame, which is calculated at said display load calculating step, so that brightness attained by display cells during sub-frames will be maintained at a given ratio.
Claim 10
Dependent Claim
170 words
A driving method for a display panel having a plurality of cells to be selectively discharged to glow, and a frame during which one screen is displayed and is composed of a plurality of sub-frames, each sub-frame including an addressing period during which said plurality of cells are set to states represented by display data, and a display glowing period during which said plurality of cells are enabled to glow according to said set states, said display glowing periods each being weighted in order to achieve gray-scale display, said driving method comprising: a display load for each sub-frame calculating step of calculating a display load to be imposed on a whole display surface each sub-frame; and a corrected period calculating step of calculating a corrected period of said display glowing period within each sub-frame according to a display load to be imposed on each sub-frame, which is calculated at said display load calculating step, so that brightness attained by display cells during sub-frames will be maintained at a given ratio.
Claim 11
Dependent Claim
57 words
A driving method for a display panel according to claim 8, wherein at said corrected period calculating step, a corrected period of said display glowing period within each sub-frame is calculated so that a brightness to be attained will be matched with the one permitted by a display load having a maximum value within a variation range.
Claim 12
Dependent Claim
66 words
A driving method for a display panel according to claim 8, wherein at said corrected period calculating step, a corrected period of said display glowing period is calculated so that a brightness to be attained will be matched with the one attained with imposition of the same display load as the one to be imposed during a sub-frame to which the largest display load is allotted.
Claim 13
Dependent Claim
71 words
A driving method for a display panel according to claim 8, wherein at said corrected period calculating step, a weighted means of display loads to be imposed during sub-frames is calculated in consideration of said weighting, and a corrected period of said display glowing period is calculated so that a brightness to be attained will be matched with the one attained with imposition of a display load of said weighted mean.
Claim 14
Dependent Claim
62 words
A driving method for a display panel according to claim 11, wherein said corrected period calculating step further includes a step of judging if a total sum of calculated corrected periods of display glowing periods exceeds a given length, and when said total sum exceeds said given length, correction is made so that said total sum will equal to said given length.
Claim 15
Dependent Claim
64 words
A driving method for a display panel according to claim 8, wherein at said corrected period calculating step, a median of display loads to be imposed during sub-frames is calculated, and a corrected period of said display glowing period is calculated so that a brightness to be attained will be matched with the one attained with imposition of a display load of said median.
Claim 16
Dependent Claim
74 words
A driving method for a display panel according to claim 8, wherein display loads to be imposed during sub-frames associated with large weights and represented by high-order bits are calculated at said display load calculating step, and a corrected period is calculated by said corrected period calculating means on the assumption that a given display load is imposed during any sub-frame other than said sub-frames associated with large weights and represented by high-order bits.
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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) | 2003-08-15 | 2004-02-14 | 2004-08-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2007-08-15 | 2008-02-14 | 2008-08-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2011-08-15 | 2012-02-14 | 2012-08-15 | $7700.00 | Window Closed / Lapsed |