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US4744638A Expired / Lapsed US ⏱️ 0.0 years remaining

Liquid crystal display apparatus having stabilizer within light source and LCD-containing case

Assignee: Mitsubishi Electric Corp
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Filing: 1985-12-09
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Granted: 1988-05-17
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Expires: 2005-12-09
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Abstract

Abstract A display apparatus having a plurality of display units arranged contiguously so as to form mosaic patterns on the display apparatus by varying in the contents of display according to control signals given thereto. The display unit includes a fluorescent lamp, a display element, a fluorescent lamp stabilizer, a glow lamp for lighting the fluorescent lamp, and a case. All these components of the display unit are accommodated in the case, so that the display apparatus is formed in a compact construction and the electronic circuits of the display units are not disturbed by noises attributable to the current flowing through the cables connecting the fluorescent lamp stabilizers to the fluorescent lamps, respectively.

Inventors

  • 👤 Makoto Ota
  • 👤 Akira Naito
  • 👤 Hiroshi Sawamura

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-10-30 10:33
CPC Classifications
G; G09; G09F; G09F9/00; G09F9/30; G09F9/35

Claims Analysis

Total Claims: 4
Claim 1
Independent Claim 76 words
A display apparatus comprising: a plurality of display units forming a display section, each display unit including a fluorescent lamp, a display element capable of transmitting light emitted by said fluorescent lamp, means varying the transmissivity of said display element in response to an input signal provided thereto, a stabilizer for stabilizing said fluorescent lamp, a case accommodating said fluorescent lamp, said stabilizer and said display element and a box supporting said plurality of display units.
Claim 2
Dependent Claim 76 words
A display apparatus comprising: a plurality of display units forming a display section, each display unit including a fluorescent lamp, a display element capable of transmitting light emitted by said fluorescent lamp, means varying the transmissivity of said display element in response to an input signal provided thereto, a stabilizer for stabilizing said fluorescent lamp, a case accommodating said fluorescent lamp, said stabilizer and said display element and a box supporting said plurality of display units.
Claim 3
Dependent Claim 16 words
A display apparatus according to claim 1, wherein said display elements are liquid crystal display elements.
Claim 4
Dependent Claim 14 words
A display apparatus according to claim 1, wherein said stabilizer is an electronic ballast.

References Cited (Backward Citations)

EP0030875A1 Cited
US4330813A Cited
US4487481A Cited
US4659183A Cited
GB2098374A Cited
EP0089378A1 Cited
US4578672A Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1991-05-17 1991-11-16 1992-05-17 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1995-05-17 1995-11-16 1996-05-17 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1999-05-17 1999-11-16 2000-05-17 $7700.00 Window Closed / Lapsed

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