Patent US5337073A successfully refreshed from Google Patents.
US5337073A
Expired / Lapsed
US
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Portable radio equipment with a display back-lighting function
Assignee: NEC Corp
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Filing: 1992-07-13
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Granted: 1994-08-09
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Expires: 2012-07-13
Abstract
Abstract Portable radio equipment having a display for displaying a message and an illuminating device for back-lighting the display. The illuminating device has a function of back-lighting the display and a function of sensing illumination on the surface of the display. Implemented by an electroluminescent lamp, the illuminating device back-lights the display surely and, yet, without wasteful consumption of power.
Inventors
- 👤 Hideyuki Tsunoda
- 👤 Toshirou Nishiyama
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 20:13
CPC Classifications
H; H04; H04M; H04M1/00; H04M1/02; H04M1/22; G; G02; G02F; G02F1/00; G02F1/01; G02F1/13; G02F1/133; G02F1/1333; G02F1/1335; G02F1/1336; G02F1/133602; G02F1/133604; G09; G09G; G09G3/00; G09G3/20; G09G3/34; G09G3/3406; H05; H05B; H05B44/00; G02F2201/00; G02F2201/58; G09G2320/00; G09G2320/06; G09G2320/0626; G09G2330/00; G09G2330/02; G09G2330/021; G09G2360/00; G09G2360/14; G09G2360/144; G09G3/04; G09G3/06; G09G3/12; G09G3/36; G09G3/3611; Y; Y02; Y02B; Y02B20/00; Y02B20/30
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
247 words
Portable radio equipment having a display for displaying a message, comprising: illuminating means comprising an electroluminescent lamp, having a function of back-lighting the display and a function of sensing illumination on a display surface of the display; first driver means for driving said illuminating means to sense illumination on the display surface of the display; second driver means for driving said illuminating means to cause said illuminating means to emit light; switching means for selecting either one of an illumination sense mode wherein said illuminating means senses illumination and a back-light mode wherein said illuminating means emits light; and control means for controlling said first and second driver means and said switching means to select either one of said illumination sense mode and said back-light mode, wherein said control means comprises: a first and second input port connected to said first driver means and said switching means; an output port connected to said switching means and said second driver means; a timer having an input terminal connecting to said first input port; an AND gate having one input terminal connecting to an output terminal of said timer and the other input terminal connecting to said second input port; an inverter having an input terminal connecting to said first input port; and a D-type flip-flop having a C terminal connecting to an output terminal of said AND gate, an R terminal connecting to an output terminal of said inverter, and a Q terminal connecting to said output port.
Claim 2
Dependent Claim
247 words
Portable radio equipment having a display for displaying a message, comprising: illuminating means comprising an electroluminescent lamp, having a function of back-lighting the display and a function of sensing illumination on a display surface of the display; first driver means for driving said illuminating means to sense illumination on the display surface of the display; second driver means for driving said illuminating means to cause said illuminating means to emit light; switching means for selecting either one of an illumination sense mode wherein said illuminating means senses illumination and a back-light mode wherein said illuminating means emits light; and control means for controlling said first and second driver means and said switching means to select either one of said illumination sense mode and said back-light mode, wherein said control means comprises: a first and second input port connected to said first driver means and said switching means; an output port connected to said switching means and said second driver means; a timer having an input terminal connecting to said first input port; an AND gate having one input terminal connecting to an output terminal of said timer and the other input terminal connecting to said second input port; an inverter having an input terminal connecting to said first input port; and a D-type flip-flop having a C terminal connecting to an output terminal of said AND gate, an R terminal connecting to an output terminal of said inverter, and a Q terminal connecting to said output port.
Claim 3
Dependent Claim
262 words
A control device for use with portable radio equipment having a display for displaying a message and illuminating means comprising an electroluminescent lamps, having a function of back-lighting said display and a function of sensing illumination on a display surface of said display for controlling said illuminating means, said control device comprising: first driver means for driving said illuminating means to sense illumination on the display surface of the display; second driver means for driving said illuminating means to cause said illuminating means to emit light; switching means for selecting either one of an illumination sense mode wherein said illuminating means senses illumination and a back-light mode wherein said illuminating means emits light; and control means for controlling said first and second driver means and said switching means to select either one of said illumination sense mode and said back-light mode, wherein said control means comprises: a first and second input port connected to said first driver means and said switching means; an output port connected to said switching means and said second driver means; a timer having an input terminal connecting to said first input port; an AND gate having one input terminal connecting to an output terminal of said timer and the other input terminal connecting to said second input port; an inverter having an input terminal connecting to said first input port; and a D-type flip-flop having a C terminal connecting to an output terminal of said AND gate, an R terminal connecting to an output terminal of said inverter, and a Q terminal connecting to said output port.
Claim 4
Dependent Claim
262 words
A control device for use with portable radio equipment having a display for displaying a message and illuminating means comprising an electroluminescent lamps, having a function of back-lighting said display and a function of sensing illumination on a display surface of said display for controlling said illuminating means, said control device comprising: first driver means for driving said illuminating means to sense illumination on the display surface of the display; second driver means for driving said illuminating means to cause said illuminating means to emit light; switching means for selecting either one of an illumination sense mode wherein said illuminating means senses illumination and a back-light mode wherein said illuminating means emits light; and control means for controlling said first and second driver means and said switching means to select either one of said illumination sense mode and said back-light mode, wherein said control means comprises: a first and second input port connected to said first driver means and said switching means; an output port connected to said switching means and said second driver means; a timer having an input terminal connecting to said first input port; an AND gate having one input terminal connecting to an output terminal of said timer and the other input terminal connecting to said second input port; an inverter having an input terminal connecting to said first input port; and a D-type flip-flop having a C terminal connecting to an output terminal of said AND gate, an R terminal connecting to an output terminal of said inverter, and a Q terminal connecting to said output port.
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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) | 1997-08-08 | 1998-02-07 | 1998-08-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2001-08-08 | 2002-02-07 | 2002-08-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2005-08-08 | 2006-02-07 | 2006-08-09 | $7700.00 | Window Closed / Lapsed |