US5834889A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cold cathode fluorescent display
Assignee: GL DISPLAY Inc
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Filing: 1995-09-22
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Granted: 1998-11-10
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Expires: 2015-09-22
Abstract
Abstract A monochromic, multi-color and full-color cold cathode fluorescent display (CFD), comprises of: some shaped white or multi-color or red, green, blue three primary color cold cathode fluorescent lamps (CCFL), reflector, base plate, temperature control mean, luminance and contrast enhancement face plate, shades, and its driving electronics. CFD is a large screen display device which has high luminance, high efficiency, long lifetime, high contrast and excellent color. CFD can be used for applications both of outdoor and indoor even at direct sunlight, to display character, graphic and video image.
Inventors
- 👤 Xiaoqin Ge
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 22:52
CPC Classifications
H; H01; H01J; H01J61/00; H01J61/02; H01J61/30; H01J61/32; H01J61/327; H01J61/34; H01J61/70; H01J61/76; H01J61/78; H01J65/00; H01J65/04; H01J65/042; H01J65/046
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
73 words
A fluorescent display device comprising: at least one cold cathode fluorescent lamp having at least one electrode; a glass container having a cone-shaped or nearly cone-shaped backside and a high reflective layer on or near the backside to reflect light and to increase the luminance of the device, the container enclosing the at least one lamp; and a support member located adjacent and connected to the container, supporting the at least one lamp.
Claim 2
Dependent Claim
73 words
A fluorescent display device comprising: at least one cold cathode fluorescent lamp having at least one electrode; a glass container having a cone-shaped or nearly cone-shaped backside and a high reflective layer on or near the backside to reflect light and to increase the luminance of the device, the container enclosing the at least one lamp; and a support member located adjacent and connected to the container, supporting the at least one lamp.
Claim 3
Dependent Claim
24 words
The device of claim 1, wherein said glass tube has a front face which includes a diffusing spherical portion and a transparent spherical surface.
Claim 4
Dependent Claim
25 words
The device of claim 1, wherein the layer is a thin film comprising an Al, Ag or alloy on an internal surface of said tube.
Claim 5
Dependent Claim
17 words
The device of claim 1, said at least one cold cathode fluorescent lamp emits substantially monochromatic light.
Claim 6
Dependent Claim
21 words
The device of claim 1, said device comprising at least one group of red, green and blue lamps in the tube.
Claim 7
Dependent Claim
31 words
The device of claim 1, said support member comprising a high reflectance base plate to reflect light from the at least one lamp and to increase the luminance of the device.
Claim 8
Dependent Claim
45 words
The device of claim 1, said support member comprising a base plate supporting the at least one lamp, said device further comprising: a lamp base attaching the at least one lamp to said base plate; and a connector connected to the at least one electrode.
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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) | 2001-11-09 | 2002-05-11 | 2002-11-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2005-11-09 | 2006-05-11 | 2006-11-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2009-11-09 | 2010-05-11 | 2010-11-10 | $7700.00 | Window Closed / Lapsed |