EP0408036A2
Expired / Lapsed
EP
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High resolution LCD display system
Assignee: In Focus Systems Inc
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Filing: 1990-07-12
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Granted: —
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Expires: 2010-07-12
Abstract
Abstract A high resolution LCD display is fabricated with a plurality of panels. Each panel has active rows and inactive rows. The panels are stacked and aligned so that each active row is in alignment with inactive rows in all the other panels of the stack. The parallax problem inherent with this stacked cell approach is eliminated by a lens system that collimates light illuminating the stacked assembly.
Inventors
- 👤 Paul E. Gulick
- 👤 Arlie R. Conner
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-31 03:36
CPC Classifications
G; G02; G02F; G02F1/00; G02F1/01; G02F1/13; G02F1/133; G02F1/1333; G02F1/1347; G02F1/13471; G02F1/13473; G02F1/1335; G02F1/133526; G06; G06F; G06F1/00; G06F1/16; G06F1/1601; G06F1/1613; G06F1/20; G06F1/203; G02F1/133528; G02F1/133533; G02F1/1343; G02F1/134309; G02F1/134336; G06F2200/00; G06F2200/16; G06F2200/161; G06F2200/1612
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
111 words
A display subassembly comprising: first and second polarizers; and first and second LCD panels stacked between the first and second polarizers, each of said panels having a plurality of active rows and a plurality of inactive rows, each of the active rows being comprised of a plurality of pixels, the two panels being aligned with each other so that each active row in one panel is in optical alignment with an inactive row in the other panel, wherein the two panels can be cooperatively operated to yield a composite display whose resolution includes all of the active rows in the first panel plus all the active rows in the second panel.
Claim 2
Dependent Claim
111 words
A display subassembly comprising: first and second polarizers; and first and second LCD panels stacked between the first and second polarizers, each of said panels having a plurality of active rows and a plurality of inactive rows, each of the active rows being comprised of a plurality of pixels, the two panels being aligned with each other so that each active row in one panel is in optical alignment with an inactive row in the other panel, wherein the two panels can be cooperatively operated to yield a composite display whose resolution includes all of the active rows in the first panel plus all the active rows in the second panel.
Claim 3
Dependent Claim
22 words
The display subassembly of claim 1 in which the first and second panels each have their active and inactive rows alternately interlaced.
Claim 4
Dependent Claim
18 words
The display subassembly of claim 1 which further includes a polarizer interposed between the first and second panels.
Claim 5
Dependent Claim
57 words
The display subassembly of claim 1 in which each pixel in each active row is a double cell comprised a first, operative liquid crystal cell of a first twist in cooperative relationship with a second, passive liquid crystal cell of a second twist opposite the first that compensates for wavelength dependence in the first liquid crystal cell.
Claim 6
Dependent Claim
74 words
The display subassembly of claim 1 in which each pixel in each active row of the first panel comprises an operative liquid crystal cell of a first twist that operates in conjunction with a passive liquid crystal cell of a second twist opposite the first, said passive liquid crystal cell comprising a corresponding pixel in the inactive row of the second panel with which the active row of the first panel is in alignment.
Claim 7
Dependent Claim
22 words
The display subassembly of claim 5 in which the first and second panels each have their active and inactive rows alternately interlaced.
Claim 8
Dependent Claim
28 words
A display system that includes the display subassembly of claim 1 and which further includes: means for collimating light entering the display subassembly in a direction orthogonal thereto.
Claim 9
Dependent Claim
24 words
The display system of claim 7 which further includes dispersion means for dispersing collimated light exiting the display subassembly to permit wide angle viewing.
Claim 10
Dependent Claim
67 words
A display system that includes the display subassembly of claim 1 and which further includes: means for receiving light focused on a predetermined point and for collimating said light for illumination of the display subassembly; and means for re-focusing the collimated light exiting the display subassembly back onto the predetermined point; wherein the display system can be utilized on the display surface of a conventional overhead projector.
Claim 11
Dependent Claim
37 words
An accessory for use with an electronic transparency, the accessory comprising a collapsible stand having a light-transmitting surface against which the electronic transparency can rest, and an internal light source for directing illumination through the light-transmitting surface.
Claim 12
Dependent Claim
37 words
An accessory for use with an electronic transparency, the accessory comprising a collapsible stand having a light-transmitting surface against which the electronic transparency can rest, and an internal light source for directing illumination through the light-transmitting surface.
Claim 13
Dependent Claim
46 words
The accessory of claim 10 which further includes optics for focusing the light directed through the light-transmitting surface towards a point external of the accessory, wherein said optics can cooperate with collimation optics on the electronic transparency to provide collimated light passing through the electronic transparency.
References Cited (Backward Citations)
No citation records indexed.
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