Patent DE460545C successfully refreshed from Google Patents.
EP0283014A2
Expired / Lapsed
EP
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Flat fluorescent lamp for liquid crystal display
Assignee: Sanyo Electric Co Ltd
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Filing: 1988-03-17
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Granted: —
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Expires: 2008-03-17
Abstract
Abstract In a flat fluorescent lamp for serving as a back light of liquid crystal panels for use in display devices, upper and lower glass plates are respectively coated with fluorescent film on its inner surface and arranged in parallel to each other, a glass side wall is disposed along the peripheral edges of the upper and lower glass plates in order to form a hermetic discharge space between the upper and lower glass plates, a pair of discharge electrodes are arranged in parallel within the discharge space and opposed to each other, at least one reinforcing glass member having a height approximately equal to the distance between the upper and lower glass plates and for supporting the upper and lower glass plates is disposed between the electrodes, and the upper glass plate is formed at its inner surface with an uncoated portion having no fluorescent film at the position where the upper glass plate is opposed to the reinforcing glass member in contact therewith.
Inventors
- 👤 Katsuhiro Hinotani
- 👤 Shunichi Kishimoto
- 👤 Haruhisa Kosaka
- 👤 Katsumi Terada
- 👤 Goro Hamagishi
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-05 13:01
CPC Classifications
H; H01; H01J; H01J61/00; H01J61/70; H01J61/72; G; G02; G02F; G02F1/00; G02F1/01; G02F1/13; G02F1/133; G02F1/1333; G02F1/1335; G02F1/1336; G02F1/133602; G02F1/133604; H01J61/02; H01J61/30; H01J61/33
Claims Analysis
Total Claims: 20
Claim 1
Independent Claim
188 words
A flat fluorescent lamp for a liquid crystal panel comprising: a rectangular lower glass plate coated with a fluorescent film on its inner surface, a rectangular upper glass plate coated with a fluorescent film on its inner surface and disposed above the lower glass plate in opposed relation thereto, a glass side wall disposed along the peripheral edges of the upper and lower glass plates and having its upper and lower end faces hermetically joined to the peripheral edges of the glass plates to define a hermetic discharge space between the upper and lower glass plates, a pair of discharge electrodes arranged in parallel within the discharge space and opposed to each other, and at least one reinforcing glass member disposed between the electrodes and for supporting the upper and lower glass plates, the reinforcing glass member having a height approximately equal to the distance between the upper and lower glass plates, the inner surface of the upper glass plate being formed with an uncoated portion having no fulorescent film at the position where the upper glass plate is opposed to the reinforcing glass member in contact therewith.
Claim 2
Dependent Claim
188 words
A flat fluorescent lamp for a liquid crystal panel comprising: a rectangular lower glass plate coated with a fluorescent film on its inner surface, a rectangular upper glass plate coated with a fluorescent film on its inner surface and disposed above the lower glass plate in opposed relation thereto, a glass side wall disposed along the peripheral edges of the upper and lower glass plates and having its upper and lower end faces hermetically joined to the peripheral edges of the glass plates to define a hermetic discharge space between the upper and lower glass plates, a pair of discharge electrodes arranged in parallel within the discharge space and opposed to each other, and at least one reinforcing glass member disposed between the electrodes and for supporting the upper and lower glass plates, the reinforcing glass member having a height approximately equal to the distance between the upper and lower glass plates, the inner surface of the upper glass plate being formed with an uncoated portion having no fulorescent film at the position where the upper glass plate is opposed to the reinforcing glass member in contact therewith.
Claim 3
Dependent Claim
59 words
A flat fluorescent lamp as defined in claim 1 wherein each of the upper and lower glass plates is a planar glass sheet, and the glass side wall is a rectangular frame shaped in conformity with the contour of the upper and lower glass plates and has its upper and lower end faces adhered to the two glass plates.
Claim 4
Dependent Claim
20 words
A flat fluorescent lamp as defined in claim 1 wherein the upper glass plate is rough-surfaced over its upper side.
Claim 5
Dependent Claim
62 words
A flat fluorescent lamp as defined in claim 1 wherein the lower glass plate has an uncoated portion without any fluorescent film at the position where the lower glass plate is opposed to the reinforcing member in contact therewith, the lower glass plate being provided on its lower surface with a reflecting film positioned in corresponding relation to the uncoated portion thereof.
Claim 6
Dependent Claim
25 words
A flat fluorescent lamp as defined in claim 1 wherein the reinforcing glass member has upper and lower ends and opposite sides which are rough-surfaced.
Claim 7
Dependent Claim
27 words
A flat fluorescent lamp as defined in claim 1 wherein the reinforcing glass member is coated with a fluorescent film over each of its opposite side surfaces.
Claim 8
Dependent Claim
27 words
A flat fluorescent lamp as defined in claim 1 wherein the reinforcing glass member is made of translucent glass containing a multiplicity of light reflecting fine particles.
Claim 9
Dependent Claim
31 words
A flat fluorescent lamp as defined in claim 7 wherein the reinforcing glass member is made of multifoam glass having a milky white color and containing a multiplicity of fine bubbles.
Claim 10
Dependent Claim
30 words
A flat fluorescent lamp as defined in claim 1 wherein the reinforcing glass member is made of a glass having flat transmittance characteristics in the wavelength range of visible rays.
Claim 11
Dependent Claim
20 words
A flat fluorescent lamp as defined in claim 9 wherein the reinforcing glass member is made of low iron glass.
Claim 12
Dependent Claim
43 words
A flat fluorescent lamp as defined in claim 1 wherein the reinforcing glass is in the form of a pipe made of a glass having characteristics to transmit UV rays, and the pipe is coated with a fluorescent film over its inner surface.
Claim 13
Dependent Claim
31 words
A flat fluorescent lamp as defined in claim 1 wherein the reinforcing glass member is engaged at its opposite ends with the discharge electrodes and thereby supported within the discharge space.
Claim 14
Dependent Claim
29 words
A flat fluorescent lamp as defined in claim 1 wherein the reinforcing glass member is adhered at its lower end face to the lower glass plate with frit glass.
Claim 15
Dependent Claim
43 words
A flat fluorescent lamp as defined in claim 1 wherein each of the discharge electrodes is in the form of a channel or has a circular-arc or V-shaped cross section, and is recessed at one side thereof opposed to the other discharge electrode.
Claim 16
Dependent Claim
39 words
A flat fluorescent lamp as defined in claim 12 wherein each of the discharge electrodes is formed with a cutout having fitted therein the end of the reinforcing glass member to support the reinforcing member within the discharge space.
Claim 17
Dependent Claim
41 words
A flat fluorescent lamp as defined in claim 12 wherein each of the discharge electrodes is formed with an enlarged recessed portion having fitted therein the end of the reinforcing glass member to support the reinforcing member within the discharge space.
Claim 18
Dependent Claim
45 words
A flat fluorescent lamp as defined in claim 12 wherein each of the discharge electrodes is provided a pair of parallel auxiliary electrodes projecting therefrom and having the end of the reinforcing glass member clamped therebetween to support the reinforcing member within the discharge space.
Claim 19
Dependent Claim
219 words
A flat fluorescent lamp for a liquid crystal panel comprising: a rectangular lower glass plate coated with a fluorescent film on its inner surface, a rectangular upper glass plate coated with a fluorescent film on its inner surface and disposed above the lower glass plate in opposed relation thereto, a glass side wall disposed along the peripheral edges of the upper and lower glass plates and having its upper and lower end faces hermetically joined to the peripheral edges of the glass plates to define a hermetic discharge space between the upper and lower glass plates, a pair of discharge electrodes arranged in parallel within the discharge space and opposed to each other, and at least one reinforcing glass member disposed between the electrodes and having a height approximately equal to the distance between the upper and lower glass plates, the reinforcing glass member being made of a glass having characteristics to transmit UV rays and being provided between the upper and lower glass plates without using any adhesive at least at the portion thereof opposed to the upper glass plate to support the two glass plates, the fluorescent film on the upper glass plate being formed over the substantially entire inner surface thereof defining the discharge space and including the portion thereof opposed to the reinforcing glass member.
Claim 20
Dependent Claim
219 words
A flat fluorescent lamp for a liquid crystal panel comprising: a rectangular lower glass plate coated with a fluorescent film on its inner surface, a rectangular upper glass plate coated with a fluorescent film on its inner surface and disposed above the lower glass plate in opposed relation thereto, a glass side wall disposed along the peripheral edges of the upper and lower glass plates and having its upper and lower end faces hermetically joined to the peripheral edges of the glass plates to define a hermetic discharge space between the upper and lower glass plates, a pair of discharge electrodes arranged in parallel within the discharge space and opposed to each other, and at least one reinforcing glass member disposed between the electrodes and having a height approximately equal to the distance between the upper and lower glass plates, the reinforcing glass member being made of a glass having characteristics to transmit UV rays and being provided between the upper and lower glass plates without using any adhesive at least at the portion thereof opposed to the upper glass plate to support the two glass plates, the fluorescent film on the upper glass plate being formed over the substantially entire inner surface thereof defining the discharge space and including the portion thereof opposed to the reinforcing glass member.
References Cited (Backward Citations)
No citation records indexed.
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