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EP0322106A2 Expired / Lapsed EP ⏱️ 0.0 years remaining

Display device

Assignee: EMI Group Ltd
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Filing: 1988-11-21
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Granted: —
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Expires: 2008-11-21
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Abstract

Abstract A display device (2) comprises an arrangement of selectively operable colour-transmissive pixels transmissive of a first colour (10) and at least a second colour (6, 8) for effecting a colour display and means (22, 24) for addressing the pixels in response to a signal representing an image input to the display device (2). The arrangement comprises a plurality of adjacent groups of pixels in whch each group of pixels comprises more pixels of the first colour (10) than of a second colour (6, 8) so that the resolution of the first colour is greater than the resolution of the second colour. Because the eye is more tolerant of a lower resolution of certain colours, e.g. red or blue, than of other colours, e.g. green, it is possible to reduce the number of pixels of the certain colours and hence the number of individually addressable pixels for a given perceived resolution. Thus the construction of the display device is simplified.

Inventors

  • 👤 David John Gibbons
  • 👤 Rodney William Young

Bibliographic Details

Application Number —
Jurisdiction EP
Data Source google_patents
Last Synchronized 2026-11-01 20:48
CPC Classifications
G; G02; G02F; G02F1/00; G02F1/01; G02F1/13; G02F1/133; G02F1/1333; G02F1/1335; G02F1/133509; G02F1/133514; G02F2201/00; G02F2201/52

Claims Analysis

Total Claims: 10
Claim 1
Independent Claim 90 words
A display device comprising an arrangement of selectively operable colour-transmissive pixels transmissive of a first colour and at least a second colour for effecting a colour display and means for addressing the pixels in response to a signal representing an image input to the display device wherein the arrangement comprises a plurality of adjacent groups of pixels, each group of pixels comprising more pixels of said first colour than of said second colour so that the resolution of said first colour is greater than the resolution of said second colour.
Claim 2
Dependent Claim 90 words
A display device comprising an arrangement of selectively operable colour-transmissive pixels transmissive of a first colour and at least a second colour for effecting a colour display and means for addressing the pixels in response to a signal representing an image input to the display device wherein the arrangement comprises a plurality of adjacent groups of pixels, each group of pixels comprising more pixels of said first colour than of said second colour so that the resolution of said first colour is greater than the resolution of said second colour.
Claim 3
Dependent Claim 17 words
A display device according to Claim 1 wherein the display device is a liquid crystal display device.
Claim 4
Dependent Claim 74 words
A display device according to any one of the preceding claims wherein the arrangement of colour-transmissive pixels is formed of a plurality of multicolour elements, each multicolour element consisting of an element of each of said first and said at least a second colour, and a pixel of said second colour is formed by a group of adjacent elements of said second colour whereby the group of adjacent elements share a common addressing means.
Claim 5
Dependent Claim 55 words
A display device according to Claim 3, the addressing means comprising an arrangement of row and column conductors appropriately connected to the pixels wherein each of the column conductors is connected to one of a plurality of pixels of said first colour or one of a plurality of pixels of said at least second colour.
Claim 6
Dependent Claim 27 words
A display device according to Claim 4 wherein a pixel of said second colour has a linear dimension twice that of a pixel of said first colour.
Claim 7
Dependent Claim 36 words
A display device according to Claim 5 wherein each row conductor is connected to a plurality of pixels of said first colour and also connected to a plurality of pixels of said at least second colour.
Claim 8
Dependent Claim 48 words
A display device according to any one of the preceding claims wherein said at least a second colour comprises a said second colour and a third colour and each group of pixels comprises more pixels of said first colour than of each of said second and third colours.
Claim 9
Dependent Claim 45 words
A display device according to Claim 7 dependent on Claim 6 wherein the addressing means includes means for time-division multiplexing the signal so that pixels of said second colour are addressed in one field and pixels of said third colour are addressed in another field.
Claim 10
Dependent Claim 31 words
A display device according to any one of the preceding claims wherein said first colour is green and said at least a second colour consists of the colours red and blue.

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