EP0347790A2
Expired / Lapsed
EP
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Liquid crystal display unit and method for displaying an image with such unit
Assignee: Honeywell Inc
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Filing: 1989-06-19
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Granted: —
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Expires: 2009-06-19
Abstract
Abstract A liquid crystal display unit (100) is described in which a first panel of pixel elements is used to control red and green portions of a displayed image using an additive technique while a second panel, having pixels aligned with the first panel pixels, controls the blue portion of the image through subtractive techniques. The resulting display system can provide enhanced brightness, resolution and color characteristics. The display system makes use of the fact that the eye is less sensitive to blue radiation for several visual parameters. As a result of the decreased sensitivity, the second (blue) panel can operate with less stringent requirements.
Inventors
- 👤 Michael J. Johnson
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-09 14:05
CPC Classifications
G; G02; G02F; G02F1/00; G02F1/01; G02F1/13; G02F1/133; G02F1/1333; G02F1/1347; G02F1/13475
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
51 words
A liquid crystal display unit, characterized by : first panel means (1) for controlling transmission of red and green image components (4, 5) therethrough; and second panel means (6) for controlling transmission of blue image components (7) therethrough, said second panel components being aligned with said red and green image components.
Claim 2
Dependent Claim
51 words
A liquid crystal display unit, characterized by : first panel means (1) for controlling transmission of red and green image components (4, 5) therethrough; and second panel means (6) for controlling transmission of blue image components (7) therethrough, said second panel components being aligned with said red and green image components.
Claim 3
Dependent Claim
41 words
Display unit according to claim 1, characterized in that said first panel means (1) controls said red and green image components by additive spatial proximity techniques and that said second pane! means (6) controls said blue image components by subtractive techniques.
Claim 4
Dependent Claim
20 words
Display unit according to claim 2, characterized in that image resolution is determined by said red and green image components.
Claim 5
Dependent Claim
57 words
Display unit according to claim 2, characterized in that said first panel (1) includes a first plurality of controllable liquid crystal pixel units (4) for controlling transmission of red color components therethrough and that said first panel (1) includes a second plurality of controllable liquid crystal pixel units (5) for controlling transmission of green color components therethrough.
Claim 6
Dependent Claim
41 words
Display unit according to claim 4, characterized in that said second panel (6) includes a third plurality of controllable liquid crystal pixel units (7), each of said third plurality of pixel units aligned with a plurality of first panel pixel units.
Claim 7
Dependent Claim
25 words
Display unit according to claim 5, characterized in that brightness parameters of an image are controlled by said first panel (1) pixel units (4, 5).
Claim 8
Dependent Claim
27 words
Display unit according to claim 6, characterized in that said first, second and third pluralities of pixel units (4, 5, 7) are controlled using matrix addressing techniques.
Claim 9
Dependent Claim
52 words
Display unit according to one of claims 1 to 7, characterized in that said second panel (6) pixel units (7)) are at least as large as said first panel (1) pixel units (4, 5), a second panel pixel unit transmitting radiation transmitted by a plurality of pixel units of said first panel.
Claim 10
Dependent Claim
58 words
Display unit according to claim 8, characterized in that said second panel (6) includes a dichroic material and a liquid crystal material (16) along with a first plurality of control elements (10) and said first panel (1) includes a crystal material (12), a mosaic of red/blue and green/blue filters (15) and a second plurality of control elements (11).
Claim 11
Dependent Claim
28 words
Display unit according to claim 9, characterized in that colors of said image are obtained by combining radiation transmitted through a plurality of proximate first panel pixel units.
Claim 12
Dependent Claim
21 words
Display unit according to claim 10, characterized in that image resolution is determined by said first panel pixel units (4, 5).
Claim 13
Independent Claim
48 words
A method of displaying an image, characterized by the steps of: controllably transmitting blue image components through a second panel in response to white light applied thereto: and controllably transmitting red and green image components through a first panel, said first panel receiving light from said second panel.
Claim 14
Independent Claim
48 words
A method of displaying an image, characterized by the steps of: controllably transmitting blue image components through a second panel in response to white light applied thereto: and controllably transmitting red and green image components through a first panel, said first panel receiving light from said second panel.
Claim 15
Dependent Claim
23 words
Method according to claim 12, further characterized by the step of visually integrating light through proximate red image components and green image components.
References Cited (Backward Citations)
No citation records indexed.
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