US5189406A
Expired / Lapsed
US
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Display device
Assignee: Central Research Laboratories Ltd
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Filing: 1991-08-28
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Granted: 1993-02-23
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Expires: 2011-08-28
Abstract
Abstract The display has a video signal receiver and a store with a capacity to hold one picture of the video signal. Row-output devices enable the video information for respective rows of pixels to be taken out from picture store, and each has a bit extractor to separate out one bit of the information for each pixel of the respective row. The resultant signal is passed to pixel drivers which operates on a lattice 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 geometric progression with the common ratio N being an integer corresponding to 2 or more.
Inventors
- 👤 Brian J. Humphries
- 👤 Colin M. Waters
- 👤 Steven D. Bull
- 👤 Christopher J. Morris
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 09:09
CPC Classifications
H; H04; H04N; H04N3/00; H04N3/10; H04N3/12; H04N3/127; G; G09; G09G; G09G3/00; G09G3/20; G09G3/34; G09G3/3406; G09G3/36; G09G3/3611; G09G3/3622; G09G3/3629; G09G3/3674; G09G3/3685; G09G2310/00; G09G2310/02; G09G2310/0202; G09G2310/0205; G09G2310/0235; G09G2320/00; G09G2320/06; G09G2320/0626; G09G2320/0633; G09G2320/064; G09G3/2007; G09G3/2018; G09G3/2022; G09G3/2025; G09G3/2044; G09G3/2051; G09G3/2059
Claims Analysis
Total Claims: 32
Claim 1
Independent Claim
179 words
A display device for displaying a picture with grey-scale, the display device comprising: a lattice of pixel elements, each selectably settable in dependence on the respective pixel-data in a received signal representing one picture for display; means to effect time-multiplex addressing of collections of rows of pixel elements within a group address period according to a predetermined sequence, each collection being addressed a plurality of address times for each picture; the addressing means including means to set in each group address period a group of collections of rows said group consisting of a plurality of collections of rows spaced apart in the address sequence such that the collections of rows in a group form a series with adjacent collections of rows having a temporal separation exhibiting a geometric progression in the addressing sequence, the geometric progression having a common ratio N which is an integer of at least 2; each pixel within a group being set for a time duration dependent upon the temporal separation of adjacent collections of rows within the sequence thereby to effect a grey-scale display.
Claim 2
Dependent Claim
179 words
A display device for displaying a picture with grey-scale, the display device comprising: a lattice of pixel elements, each selectably settable in dependence on the respective pixel-data in a received signal representing one picture for display; means to effect time-multiplex addressing of collections of rows of pixel elements within a group address period according to a predetermined sequence, each collection being addressed a plurality of address times for each picture; the addressing means including means to set in each group address period a group of collections of rows said group consisting of a plurality of collections of rows spaced apart in the address sequence such that the collections of rows in a group form a series with adjacent collections of rows having a temporal separation exhibiting a geometric progression in the addressing sequence, the geometric progression having a common ratio N which is an integer of at least 2; each pixel within a group being set for a time duration dependent upon the temporal separation of adjacent collections of rows within the sequence thereby to effect a grey-scale display.
Claim 3
Dependent Claim
178 words
A display for displaying a picture with grey-scale, the display device comprising: a lattice of pixel elements, each selectably settable in dependence on the respective pixel-data in a received signal representing one picture for display; means to effect time-multiplex addressing of collections of rows of pixel elements within a group address period according to a predetermined sequence, each collection being addressed a plurality of address times for each picture; the addressing means including means to set in each group address period a group of collections of rows, said group consisting of a plurality of collections of rows spaced apart in the address sequence such that the collections of rows in a group form a series with adjacent collections of rows having a temporal separation exhibiting a geometric progression in the addressing sequence, the geometric progression having a common ratio N which is an integer of at least 3; each pixel within a group being set for a time duration dependent upon the temporal separation of adjacent collections of rows within the sequence, thereby to effect a grey-scale display.
Claim 4
Dependent Claim
178 words
A display for displaying a picture with grey-scale, the display device comprising: a lattice of pixel elements, each selectably settable in dependence on the respective pixel-data in a received signal representing one picture for display; means to effect time-multiplex addressing of collections of rows of pixel elements within a group address period according to a predetermined sequence, each collection being addressed a plurality of address times for each picture; the addressing means including means to set in each group address period a group of collections of rows, said group consisting of a plurality of collections of rows spaced apart in the address sequence such that the collections of rows in a group form a series with adjacent collections of rows having a temporal separation exhibiting a geometric progression in the addressing sequence, the geometric progression having a common ratio N which is an integer of at least 3; each pixel within a group being set for a time duration dependent upon the temporal separation of adjacent collections of rows within the sequence, thereby to effect a grey-scale display.
Claim 5
Dependent Claim
28 words
A display device according to claim 1, wherein each pixel element has a number of selectively settable states and N equals said number of states in the pixel.
Claim 6
Dependent Claim
61 words
A display device according to claim 1, wherein a signal for a picture includes a plurality of portions each representing data for setting a respective pixel element in the lattice, each such portion being constituted by a plurality of bits with at least one bit representing addressing-data for said respective pixel element in respect of one address time in that picture.
Claim 7
Dependent Claim
49 words
A display device according to claim 4 wherein the addressing means includes: means to set all the pixels in any one collection of rows of said group in accordance with a said at least one bit for each pixel in said any one collections of rows in one picture.
Claim 8
Dependent Claim
62 words
A display device according to claim 1, wherein the lattice comprises a predetermined number of rows of pixels, and the number of rows in a collection of rows is the number of rows in the lattice divided by (N m -1)/(N-1) where N is said common ratio of geometric progression and M is the number of said address times in a picture.
Claim 9
Dependent Claim
75 words
A display device according to claim 1, for displaying a plurality of consecutive picture, the display device comprising means to produce a value for a mean brightness level for a first picture, means to produce a scaling signal by comparing the mean brightness level value with a reference brightness value and means to effect scaling of the brightness level represented by pixel-data for each group in the next picture in accordance with said sealing signal.
Claim 10
Dependent Claim
17 words
A display device according to claim 1, where a plurality of liquid crystal cells form the lattice.
Claim 11
Independent Claim
164 words
A method of displaying a picture with grey-scale in a display device, the display device having a lattice of pixel elements each selectably settable, the method comprising: receiving a signal including pixel-data and representing a plurality of pictures for display; time-multiplex addressing collections of rows of pixel elements within a group address period according to a predetermined sequence a plurality of address time for each picture; the addressing step including setting in each group address period a group of collections of rows, said group consisting of a plurality of collections of rows spaced apart in the address sequence such that collections of rows in said group form a series with adjacent collections of rows having a temporal separation exhibiting a geometric progression having a ration N which is an integer of at least 2; each pixel within a group being set for a time duration dependent upon the temporal separation of adjacent collections of rows within the sequence, thereby to effect a grey-scale display.
Claim 12
Independent Claim
164 words
A method of displaying a picture with grey-scale in a display device, the display device having a lattice of pixel elements each selectably settable, the method comprising: receiving a signal including pixel-data and representing a plurality of pictures for display; time-multiplex addressing collections of rows of pixel elements within a group address period according to a predetermined sequence a plurality of address time for each picture; the addressing step including setting in each group address period a group of collections of rows, said group consisting of a plurality of collections of rows spaced apart in the address sequence such that collections of rows in said group form a series with adjacent collections of rows having a temporal separation exhibiting a geometric progression having a ration N which is an integer of at least 2; each pixel within a group being set for a time duration dependent upon the temporal separation of adjacent collections of rows within the sequence, thereby to effect a grey-scale display.
Claim 13
Dependent Claim
61 words
A method according to claim 9, wherein a signal for a picture includes a plurality of portions each representing data for setting a respective pixel element in the lattice, each such portion being constituted by a plurality of bits with at least one bit representing addressing data for said respective pixel element in respect of one address time in that picture.
Claim 14
Dependent Claim
116 words
A method according to claim 10, wherein the addressing step includes: setting all the pixels of a first collection of rows of a group in accordance with a first said at least one bit for each pixel in said first collection in one picture; then setting all the pixels of another collection of rows of the group in accordance with another said at least one bit for each pixel in said another collection of rows in that picture: and repeating the setting steps for respective all the pixels of each other collection of rows of the group in accordance with respective said at least one bit for each pixel of said each other collection or rows.
Claim 15
Dependent Claim
17 words
A method according to claim 9, wherein N corresponds to the number of states in the pixel.
Claim 16
Dependent Claim
53 words
A method according to claim 9, wherein the number of rows of pixels in a collection of rows is the number of rows in he lattice divided by (N m -1)/(N-1) wherein N is said common ration of said geometric progression and M is the number of said address times in a picture.
Claim 17
Dependent Claim
68 words
A method according to claim 9 for displaying a plurality of consecutive pictures, comprising the further steps of producing a value for the mean brightness level for a picture, producing a scaling signal by comparing said mean brightness level value with a reference brightness value and effecting scaling of the brightness level represented by pixel-data for each group in the next picture in accordance with said scaling signal.
Claim 18
Independent Claim
167 words
A method of displaying a picture with grey-scale in a display device, the device having a lattice of pixel elements each selectably settable, the method comprising: receiving a signal including pixel-data and representing a plurality of pictures for display; time-multiplex addressing collections of rows of pixel element s within a group address period a plurality of address times for each picture; the addressing step including setting in each group address period a group of collections of rows, said group consisting of a plurality of collections of rows spaced apart in the addressing sequence such that collections of rows in said group form a series with adjacent collections of rows having a temporal separation exhibiting a geometric progression in the addressing sequence, the geometric progression having a common ratio N which is an integer of at least 3; each pixel within a group being set for a time duration dependent upon the temporal separation of adjacent collections of rows within the sequence, thereby to effect a grey-scale display.
Claim 19
Independent Claim
167 words
A method of displaying a picture with grey-scale in a display device, the device having a lattice of pixel elements each selectably settable, the method comprising: receiving a signal including pixel-data and representing a plurality of pictures for display; time-multiplex addressing collections of rows of pixel element s within a group address period a plurality of address times for each picture; the addressing step including setting in each group address period a group of collections of rows, said group consisting of a plurality of collections of rows spaced apart in the addressing sequence such that collections of rows in said group form a series with adjacent collections of rows having a temporal separation exhibiting a geometric progression in the addressing sequence, the geometric progression having a common ratio N which is an integer of at least 3; each pixel within a group being set for a time duration dependent upon the temporal separation of adjacent collections of rows within the sequence, thereby to effect a grey-scale display.
Claim 20
Dependent Claim
165 words
A display device for displaying a picture with grey-scale, the display device comprising: a lattice of pixel elements, each selectably settable in dependence on the respective pixel-data in a received signal representing one picture for display; means to effect time-multiplex addressing of collections of rows of pixel elements within a group address period according to a predetermined sequence, each collection of rows being addressed a plurality of address times for each picture; the addressing means including means to set in each group address period a group of collections of rows, said group consisting of a plurality of collections of rows spaced apart in the addressing sequence such that the collections of rows in a group form a series with adjacent collections of rows having a temporal separation exhibiting a binary progression in the addressing sequence: each pixel within a group being set for a time duration dependent upon the temporal separation of adjacent collections of rows within the sequence, thereby to effect a grey-scale display.
Claim 21
Dependent Claim
165 words
A display device for displaying a picture with grey-scale, the display device comprising: a lattice of pixel elements, each selectably settable in dependence on the respective pixel-data in a received signal representing one picture for display; means to effect time-multiplex addressing of collections of rows of pixel elements within a group address period according to a predetermined sequence, each collection of rows being addressed a plurality of address times for each picture; the addressing means including means to set in each group address period a group of collections of rows, said group consisting of a plurality of collections of rows spaced apart in the addressing sequence such that the collections of rows in a group form a series with adjacent collections of rows having a temporal separation exhibiting a binary progression in the addressing sequence: each pixel within a group being set for a time duration dependent upon the temporal separation of adjacent collections of rows within the sequence, thereby to effect a grey-scale display.
Claim 22
Dependent Claim
60 words
A display device according to claim 16, wherein a signal for 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 bits with at least one bit representing addressing data for said respective pixel element in respect of one address time in that picture.
Claim 23
Dependent Claim
48 words
A display device according to claim 17, wherein the addressing means includes: means to set all the pixels in any one collection of rows of said group in accordance with said at least one bit for each pixel in said any one collection of rows in one picture.
Claim 24
Dependent Claim
57 words
A display device according to claim 16, wherein each said group of collections of rows is formed of four collections of rows each of which, during one setting operation, is set in accordance with a respective section of pixel data, said respective section comprising at least one bit for each pixel in a respective collection of rows.
Claim 25
Dependent Claim
75 words
A display device according to claim 16, for displaying a plurality of consecutive pictures, the display device comprising means to produce a value for a mean brightness level for a first picture, means to produce a scaling signal by comparing the mean brightness level value with a reference brightness value and means to effect scaling of the brightness level represented by pixel-data for each group in the next picture in accordance with said scaling signal.
Claim 26
Dependent Claim
17 words
A display device according to claim 16, wherein a plurality of liquid crystal cells form the lattice.
Claim 27
Independent Claim
147 words
A method of displaying a picture with grey-scale in a display device, the display device having a lattice of pixel elements, each selectably settable, the method comprising: receiving a signal including pixel-data and representing a plurality of pictures for display; time-multiplex addressing collections of rows of pixel elements within a group address period a plurality of address times for each picture; the addressing step including setting in each group address period a group of collections of rows, said group consisting of a plurality of collections of rows spaced apart in the addressing sequence such that collections of rows in said group form a series with adjacent collections of rows having a temporal separation exhibiting a binary progression; each pixel within a group being set for a time duration dependent upon the temporal separation of adjacent collections of rows within the sequence, thereby to effect a grey-scale display.
Claim 28
Independent Claim
147 words
A method of displaying a picture with grey-scale in a display device, the display device having a lattice of pixel elements, each selectably settable, the method comprising: receiving a signal including pixel-data and representing a plurality of pictures for display; time-multiplex addressing collections of rows of pixel elements within a group address period a plurality of address times for each picture; the addressing step including setting in each group address period a group of collections of rows, said group consisting of a plurality of collections of rows spaced apart in the addressing sequence such that collections of rows in said group form a series with adjacent collections of rows having a temporal separation exhibiting a binary progression; each pixel within a group being set for a time duration dependent upon the temporal separation of adjacent collections of rows within the sequence, thereby to effect a grey-scale display.
Claim 29
Dependent Claim
54 words
A method according to claim 21, wherein each group of collections of rows is formed of four collections of rows each of which, during one setting operation, is set in accordance with a respective section of pixel-data, said respective section comprising at least one bit for each pixel in a respective collection of rows.
Claim 30
Dependent Claim
70 words
A method according to claim 21 for displaying a plurality of consecutive pictures, comprising the further steps of producing a value for a mean brightness level for a first picture, producing a scaling signal by comparing the mean brightness level value with a reference brightness level value and effecting scaling of the brightness level represented by pixel-data for each group in the next picture in accordance with said scaling signal.
Claim 31
Dependent Claim
59 words
A method according to claim 22, wherein a signal for 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 bits with at least one bit representing addressing data for said respective pixel element in respect of one address time in that picture.
Claim 32
Dependent Claim
118 words
A method according to claim 25, wherein the addressing step includes: setting all the pixels of a first collection of rows of a group in accordance with a first said at least one bit for each pixel in said first collection of rows in one picture; then setting all the pixels of another collection of rows of the group in accordance with another said at least one bit for each pixel in said another collection of rows in that picture; and repeating the setting steps for respective all the pixels of each other collection of rows of the group in accordance with respective said at least one bit for each pixel of said each other collection of rows.
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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) | 1996-02-23 | 1996-08-24 | 1997-02-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2000-02-23 | 2000-08-24 | 2001-02-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2004-02-23 | 2004-08-24 | 2005-02-23 | $7700.00 | Window Closed / Lapsed |