Patent EP0302748A2 successfully refreshed from Google Patents.
EP0302748A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Discharge lamp type display device
Assignee: Individual
•
Filing: 1988-08-05
•
Granted: —
•
Expires: 2008-08-05
Abstract
Abstract A discharge lamp type display device which comprises a discharge vessel including a first (10) and a second (12) transparent glass plate arranged in parallel to each other, xenon gas serving as a discharge material and enclosed in a discharge space defined between the first and second glass plates, a fluorescent layer (16) coated on a predetermined position of the inner surface of at least one of the first and second glass plates and having a thickness of 0.01 to 1 mm, a first electrode (20) formed on the outer surface of the first glass plate, and a second (22) electrode formed on the outer surface of the second glass plate.
Inventors
- 👤 Shing Cheung Chow
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-09 16:11
CPC Classifications
H; H01; H01J; H01J65/00; H01J65/04; H05; H05B; H05B41/00; H05B41/14; H01J65/042; H01J65/046
Claims Analysis
Total Claims: 20
Claim 1
Independent Claim
90 words
A discharge lamp type display device including a transparent glass plate and a transparent glass member having a flat portion parallel to the glass plate, a discharge space between said glass plate and glass member, xenon gas serving as a discharge material and enclosed in said discharge space, a fluorescent layer coated on a predetermined position on the inner surface of at least one of said glass plate and glass member and having a thickness of 0.01 to 1 mm, and dual electrode means provided spaced apart on said device.
Claim 2
Dependent Claim
90 words
A discharge lamp type display device including a transparent glass plate and a transparent glass member having a flat portion parallel to the glass plate, a discharge space between said glass plate and glass member, xenon gas serving as a discharge material and enclosed in said discharge space, a fluorescent layer coated on a predetermined position on the inner surface of at least one of said glass plate and glass member and having a thickness of 0.01 to 1 mm, and dual electrode means provided spaced apart on said device.
Claim 3
Dependent Claim
22 words
A device according to claim 1 wherein the glass member is a second glass plate parallel to the first mentioned glass plate.
Claim 4
Dependent Claim
109 words
A device according to claim 1 wherein said glass member has a glass flat portion disposed parallel to said glass plate and inclduing a glass sealing portion formed along the periphery of said glass flat portion and bonded to said glass plate to form said discharge vessel, said glass sealing portion being made of the same glass as said glass flat portion and having a predetermined height, and a plurality of spacers disposed between said glass plate and said glass flat portion, said plurality of spacers being made of the same glass as said glass flat portion and formed to have the same height as said glass sealing portion.
Claim 5
Dependent Claim
33 words
A device according to claim 1, 2 or 3 wherein the fluorescent layer is printed on the inner surface of one of said glass plate and glass member and has a predetermined pattern.
Claim 6
Independent Claim
29 words
A device according to any preceding claim wherein first and second electrodes are respectively formed on the outside of the glass plate and the outside of the glass member.
Claim 7
Dependent Claim
33 words
The display device as defined in claim 5 wherein said first electrode is formed of a first electrically conductive film, and wherein said second electrode is formed of a second electrically conductive film.
Claim 8
Dependent Claim
22 words
The display device as defined in claim 6 wherein at least one of said first and second electrically conductive films is transparent.
Claim 9
Independent Claim
32 words
A device according to any one of claims 1 to 4 wherein one electrode is mounted on one end of said transparent plate and member combination and extends into said discharge space.
Claim 10
Dependent Claim
40 words
The display device as defined in claim 8 further comprising voltage impressing means for impressing to said one electrode a voltage having frequency of 0.5 to 20 kHz and varying peak values, and grounding means for grounding said one electrode.
Claim 11
Dependent Claim
30 words
The display device as defined in claim 9 wherein in use said peak values of output voltage of said voltage impressing means vary periodically, or vary to provide sawtooth waveforms.
Claim 12
Dependent Claim
31 words
A device according to claim 8, 9 or 10 wherein another electrode is formed on the outer surface of one of said glass plate and flat portion of the glass member.
Claim 13
Independent Claim
55 words
A device according to any one of claims 1 to 4 or 8 to 10 wherein a protective plate is disposed over one of said glass plate and said flat portion of said glass member and defines a space therewith and an electrically conductive liquid is enclosed in said space and serves as an electrode.
Claim 14
Dependent Claim
17 words
A device according to claim 12 wherein the protective plate protects the glass plate and/or glass member.
Claim 15
Dependent Claim
21 words
The display device as defined in claim 12 or 13 wherein said protective plate is made of a transparent acrylic plate.
Claim 16
Dependent Claim
26 words
The display device as defined in claim 12, 13 or 14 wherein said electrically conductive liquid is an aqueous solution of sodium chloride or sodium hydroxide.
Claim 17
Independent Claim
39 words
A device according to any one of claims 12 to 15 except when dependent on one of claims 8 to 11 wherein another electrode is formed on the surface of the other of said glass plate and flat portion.
Claim 18
Dependent Claim
22 words
The display device as defined in claim 11 or 16 wherein said other electrode is formed of a transparent electrically conductive film.
Claim 19
Independent Claim
155 words
A method for manufacturing a discharge lamp type display device including a discharge vessel having a pair of transparent glass plates and a plurality of spacers provided in between said glass plates, a discharge gas enclosed in said discharge vessel, a fluorescent layer coated on a predetermined position of the inner surface of at least one of said glass plates, and at least one electrode formed on the interior or the exterior of said discharge vessle, comprising the steps of; preparing a first and a second glass plate; attaching masks on one surface of said first glass plate at the periphery thereof and at the portions where said spacers are formed; chemically etching said first glass plate to a predetermined depth; combining and sealing said first and second glass plates to form said discharge vessel having said spacers; evacuating said discharge vessel; and filling said discharge vessel with a discharge gas at a predetermined pressure.
Claim 20
Independent Claim
155 words
A method for manufacturing a discharge lamp type display device including a discharge vessel having a pair of transparent glass plates and a plurality of spacers provided in between said glass plates, a discharge gas enclosed in said discharge vessel, a fluorescent layer coated on a predetermined position of the inner surface of at least one of said glass plates, and at least one electrode formed on the interior or the exterior of said discharge vessle, comprising the steps of; preparing a first and a second glass plate; attaching masks on one surface of said first glass plate at the periphery thereof and at the portions where said spacers are formed; chemically etching said first glass plate to a predetermined depth; combining and sealing said first and second glass plates to form said discharge vessel having said spacers; evacuating said discharge vessel; and filling said discharge vessel with a discharge gas at a predetermined pressure.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
Maintenance schedule is calculated for granted US utility patents.