US4807967A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Passive display device
Assignee: US Philips Corp
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Filing: 1987-01-08
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Granted: 1989-02-28
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Expires: 2007-01-08
Abstract
Abstract A passive display device is set forth having two substrates (1, 4) which are provided with fixed electrodes and a movable electrode (10) located between the substrates. The movable electrode lies against the upper substrate (4) in the quiescent state, and is connected to the lower substrate (1) by means of supports (9) of polymeric material. A method of manufacturing such a display device is also set forth.
Inventors
- 👤 Hendrik Veenvliet
- 👤 Antonius G. H. Verhulst
- 👤 Antonius H. M. Raaymakers
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 03:10
CPC Classifications
G; G09; G09F; G09F9/00; G09F9/30; G09F9/37; G09F9/372; Y; Y10; Y10S; Y10S359/00; Y10S359/90
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
178 words
A passive display device comprising first and second separated substrates with at least said first substrate being transparent; a plurality of display elements disposed between said first and second substrates for controlling reflection or transmission of light, wherein each of said plurality of display elements include at least one fixed electrode connected to at least said second of said substrates, a movable electrode being movable between said substrates, said movable electrode having a plurality of apertures, and resilient elements connecting said movable electrode to said second of said substrates; and polymeric supports disposed with one end on said second of said substrates, said resilient elements being supported at a second end of said polymeric supports, said second end of said polymeric supports extending nearly to said first substrate, wherein said polymeric supports are one of polyacrylate synthetic resin, polymethacrylate synthetic resin, polycarbonate synthetic resin, or a polyimide synthetic resin, and wherein said resilient supports enable said movable electrode of each of said plurality of display elements to be near one of said first substrate or said second substrate.
Claim 2
Dependent Claim
178 words
A passive display device comprising first and second separated substrates with at least said first substrate being transparent; a plurality of display elements disposed between said first and second substrates for controlling reflection or transmission of light, wherein each of said plurality of display elements include at least one fixed electrode connected to at least said second of said substrates, a movable electrode being movable between said substrates, said movable electrode having a plurality of apertures, and resilient elements connecting said movable electrode to said second of said substrates; and polymeric supports disposed with one end on said second of said substrates, said resilient elements being supported at a second end of said polymeric supports, said second end of said polymeric supports extending nearly to said first substrate, wherein said polymeric supports are one of polyacrylate synthetic resin, polymethacrylate synthetic resin, polycarbonate synthetic resin, or a polyimide synthetic resin, and wherein said resilient supports enable said movable electrode of each of said plurality of display elements to be near one of said first substrate or said second substrate.
Claim 3
Dependent Claim
17 words
A passive display device according to claim 1 wherein said movable electrode is a structure including aluminum.
Claim 4
Dependent Claim
27 words
A passive display device according to claim 2, wherein said movable electrode includes a dielectric layer at a major surface on opposite sides of said movable electrode.
Claim 5
Dependent Claim
16 words
A passive display device according to claim 3, wherein said dielectric layer is SiO 2 .
Claim 6
Dependent Claim
32 words
A passive display device according to claim 1, wherein said movable electrode is a structure including Ag, and wherein a polyimide dielectric layer is disposed on said at least one fixed electrode.
Claim 7
Dependent Claim
13 words
A passive display device according to claim 5, wherein said structure is Ag.
Claim 8
Dependent Claim
18 words
A passive display device according to claim 5, wherein a layer of Ag is disposed on said structure.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1992-02-28 | 1992-08-29 | 1993-02-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-02-28 | 1996-08-29 | 1997-02-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-02-28 | 2000-08-29 | 2001-02-28 | $7700.00 | Window Closed / Lapsed |