EP0261901A2
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EP
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Display device
Assignee: Central Research Laboratories Ltd
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Filing: 1987-09-18
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Granted: —
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Expires: 2007-09-18
Abstract
Abstract The display 1 has a video signal receiver 2 and a store 3 with a capacity to hole one picture of the video signal. Row-output devices 4 to 7 enable the video information for respective rows of pixels to be taken out from picture store 3, and each has a bit extractor 8,to 11 to separate out one bit of the information for each pixel of the respective row. The resultant signal is passed to pixel drivers 12 to 15 which operates on a lattice 16 formed of ferroelectric liquid crystal pixel-elements, which are time-multiplex addressed according to a predetermined sequence, each row being addressed a plurality of times for each picture. In the addressing groups of the rows are set simultaneously, each group consisting of a plurality of rows spaced apart in the addressing sequence such that the rows in a group form a series with adjacent rows having a temporal separation in the addressing sequence exhibiting a binary progression.
Inventors
- 👤 Brian Jason Humphries
- 👤 Colin Martin Waters
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-26 12:43
CPC Classifications
G; G09; G09G; G09G3/00; G09G3/20; G09G3/34; G09G3/36; G09G3/3611; G09G3/3406; G09G3/3622; G09G3/3629; G09G3/3674; G09G3/3685; H; H04; H04N; H04N3/00; H04N3/10; H04N3/12; H04N3/127; G09G2310/00; G09G2310/02; G09G2310/0202; G09G2310/0205; G09G2310/0235; G09G2320/00; G09G2320/06; G09G2320/0626; G09G2320/064; G09G3/2007; G09G3/2018; G09G3/2022; G09G3/2025; G09G3/2044; G09G3/2051; G09G3/2059
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
96 words
A display device comprising a lattice on the respective part of a received signal representing one picture for display; means to effect time-multiplex addressing of rows of pixel elements according to a predetermined sequence, each row being addressed a plurality of times for each picture; the addressing means including means to set simultaneously groups of the rows, each group consisting of a plurality of rows spaced apart in the addressing sequence such that the rows in a group form a series with adjacent rows having a temporal separation in the addressing sequence exhibiting a binary progression.
Claim 2
Dependent Claim
96 words
A display device comprising a lattice on the respective part of a received signal representing one picture for display; means to effect time-multiplex addressing of rows of pixel elements according to a predetermined sequence, each row being addressed a plurality of times for each picture; the addressing means including means to set simultaneously groups of the rows, each group consisting of a plurality of rows spaced apart in the addressing sequence such that the rows in a group form a series with adjacent rows having a temporal separation in the addressing sequence exhibiting a binary progression.
Claim 3
Dependent Claim
57 words
A display device according to Claim 1, wherein a signal for a picture includes a plurality of portions each representing the data for setting a pixel element in the lattice, each such portion being constituted by a plurality of sections, a section representing the addressing-data for the pixel element in respect of one address in that picture.
Claim 4
Dependent Claim
67 words
A display device according to Claims 1 to 2, wherein the addressing means includes: means to set all the pixels of one row of a group in accordance with a section of the pixel data in one picture and, sequentially in a line period, to set all the pixels of another row of the group in accordance with another section of the pixel data in that picture.
Claim 5
Dependent Claim
46 words
A display device according to any one of Claims 1 to 3, wherein each group of rows is formed of four rows each of which, during one setting operation, is set in accordance with a section of pixel data different from the others in the group.
Claim 6
Dependent Claim
55 words
A display device according to anyone of Claims 1 to 4, comprising means to produce a value for the mean brightness level for a picture, and means to effect scaling of the sections of pixel-data for each group in the next picture in accordance with the produced mean brightness value for the said previous picture.
Claim 7
Dependent Claim
22 words
A display device according to any one of Claims 1 to 5, wherein a plurality of liquid crystal cells form the lattice.
Claim 8
Independent Claim
91 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 plurality of pictures for display; time-multiplex addressing rows of pixel elements a plurality of times for each picture; the addressing step including setting simultaneously groups of the rows, each group consisting of a plurality of rows spaced apart in the addressing sequence such that the rows in a group form a series with adjacent rows having a temporal separation in the addressing sequence exhibiting a binary progression.
Claim 9
Independent Claim
91 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 plurality of pictures for display; time-multiplex addressing rows of pixel elements a plurality of times for each picture; the addressing step including setting simultaneously groups of the rows, each group consisting of a plurality of rows spaced apart in the addressing sequence such that the rows in a group form a series with adjacent rows having a temporal separation in the addressing sequence exhibiting a binary progression.
Claim 10
Dependent Claim
61 words
A method according to Claim 7, wherein the addressing step includes: setting all the pixels of one row of a group in accordance with a section of the pixel data in one picture and, sequentially in a line period, setting all the pixels of another row of the group in accordance with another section of the pixel data in that picture.
Claim 11
Independent Claim
42 words
A method according to Claims 7 to 8, wherein each group of rows is formed of four rows each of which, during one setting operation, is set in accordance with a section of pixel data different from the others in the group.
Claim 12
Independent Claim
51 words
A method according to any one of Claims 7 to 9, comprising producing a value for the mean brightness level for a picture, and effecting scaling of the sections of pixel-data for exah group in the next picture in accordance with the produced mean brightness value for the said previous picture.
References Cited (Backward Citations)
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