Patent EP0319291A2 successfully refreshed from Google Patents.
EP0319291A2
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Display device
Assignee: Central Research Laboratories Ltd
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Filing: 1988-12-01
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Granted: —
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Expires: 2008-12-01
Abstract
Abstract A display device has a lattice of pixel elements (20) each selectably settable. A method of operating the device comprises the steps of receiving a signal representing a picture for display and time-multiplex addressing collections of pixel elements a plurality of address times for each picture. The addressing step includes setting a group of collections, said group consisting of a plurality of collections spaced apart in the addressing sequence such that the collections in said group form a series with adjacent collections having a temporal separation in the addressing sequence exhibiting a geometric progression with a common ratio N being an integer corresponding to 3 or more. The temporal separation is a logical consequence of the order in which the collections are scanned. Such an addressing step increases the number of grey levels which can be produced.
Inventors
- 👤 Steven David Bull
- 👤 Christopher James Morris
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-09 21:23
CPC Classifications
H; H04; H04N; H04N3/00; H04N3/10; H04N3/12; H04N3/127; G; G09; G09G; G09G3/00; G09G3/20; G09G3/34; G09G3/36; G09G3/3611; G09G3/3674; G09G3/3685; G09G2310/00; G09G2310/02; G09G2310/0202; G09G2310/0205; G09G2310/0235; G09G3/2007; G09G3/2018; G09G3/2022; G09G3/2025; G09G3/2044; G09G3/2051
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
104 words
A method of operating a display device having a lattice of pixel elements each selectably settable, the method comprising:- receiving a signal representing a picture for display; and time-multiplex addressing collections of pixel elements a plurality of address times for each picture; wherein the addressing step includes setting a group of collections, said group consisting of a plurality of collections spaced apart in the addressing sequence such that the collections in said group form a series with adjacent collections having a temporal separation in the addressing sequence exhibiting a geometric progression with a common ratio N being an integer corresponding to 3 or more.
Claim 2
Independent Claim
104 words
A method of operating a display device having a lattice of pixel elements each selectably settable, the method comprising:- receiving a signal representing a picture for display; and time-multiplex addressing collections of pixel elements a plurality of address times for each picture; wherein the addressing step includes setting a group of collections, said group consisting of a plurality of collections spaced apart in the addressing sequence such that the collections in said group form a series with adjacent collections having a temporal separation in the addressing sequence exhibiting a geometric progression with a common ratio N being an integer corresponding to 3 or more.
Claim 3
Dependent Claim
26 words
A method according to Claim 1 wherein each pixel element has a number of selectively settable states and N is equal to said number of states.
Claim 4
Independent Claim
69 words
A method according to Claims 1 or 2 wherein said signal representing a picture includes a plurality of portions each representing data for setting a respective pixel element in the lattice, each such portion comprising a plurality of sections, each section representing addressing data for said respective pixel element in respect of one address time for that picture whereby the number of address times equals the number of sections.
Claim 5
Dependent Claim
64 words
A method according to Claim 3 wherein the addressing step includes the step of setting all the pixels of a first collection of said group in accordance with respective first sections of pixel data and, sequentially within a defined address period, the step of setting all the pixels of a second collection of the group in accordance with respective second sections of pixel data.
Claim 6
Independent Claim
38 words
A method according to any one of the preceding claims wherein the lattice comprises a number of rows of pixel elements and said number of rows is a multiple of where M equals said number of address times.
Claim 7
Dependent Claim
15 words
A method according to Claim 5 wherein each collection comprises a plurality of adjacent rows.
Claim 8
Independent Claim
33 words
A method according to Claims 5 or 6, each collection comprising a plurality of rows, wherein the number of rows in each collection is the number of rows in the lattice divided by
Claim 9
Independent Claim
21 words
A method according to any one of Claims 1 to 5 wherein each collection comprises a single row of pixel elements.
Claim 10
Independent Claim
51 words
A method according to any one of the preceding claims further comprising the step of producing a value for a mean brightness level for a first picture and effecting scaling of sections of pixel data for each group in the next picture in accordance with said value for said first picture.
Claim 11
Dependent Claim
118 words
A display device comprising a lattice of pixel elements, each selectively settable in dependence on a respective part of a signal representing one picture for display; and means for effecting time-multiplex addressing of collections of pixel elements according to a predetermined sequence, each collection being addressed a plurality of address times for each picture; wherein the addressing means includes means for setting a group of collections, said group consisting of a plurality of collections spaced apart in the addressing sequence such that the collections in a group form a series with adjacent collections having a temporal separation in the addressing sequence exhibiting a geometric progression with a common ratio N being an integer corresponding to 3 or more.
Claim 12
Dependent Claim
118 words
A display device comprising a lattice of pixel elements, each selectively settable in dependence on a respective part of a signal representing one picture for display; and means for effecting time-multiplex addressing of collections of pixel elements according to a predetermined sequence, each collection being addressed a plurality of address times for each picture; wherein the addressing means includes means for setting a group of collections, said group consisting of a plurality of collections spaced apart in the addressing sequence such that the collections in a group form a series with adjacent collections having a temporal separation in the addressing sequence exhibiting a geometric progression with a common ratio N being an integer corresponding to 3 or more.
Claim 13
Dependent Claim
27 words
A display device according to Claim 10 wherein each pixel element has a number of selectively settable states and N is equal to said number of states.
Claim 14
Dependent Claim
34 words
A display device according to Claims 10 or 11 wherein the lattice comprises a number of rows of pixel elements and said number of rows is where M equals said number of address times.
Claim 15
Dependent Claim
16 words
A display device according to Claim 12 wherein each collection comprises a plurality of adjacent rows.
Claim 16
Dependent Claim
34 words
A display device according to Claims 12 or 13, each collection comprising a plurality of rows, wherein the number of rows in each collection is the number of rows in the lattice divided by
Claim 17
Dependent Claim
22 words
A display device according to any one of Claims 10 to 12 wherein each collection comprises a single row of pixel elements.
References Cited (Backward Citations)
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