US4236153A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Character display device
Assignee: US Philips Corp
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Filing: 1978-02-27
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Granted: 1980-11-25
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Expires: 1998-02-27
Abstract
Abstract A low-noise character element display device is obtained by periodically gradually switching on and off of the display elements and by changing the information to be displaced at instants that the display elements are off.
Inventors
- 👤 Willem Aling
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 05:21
CPC Classifications
G; G09; G09G; G09G3/00; G09G3/04; G09G3/06; G09G3/12; G09G3/14; H; H03; H03J; H03J1/00; H03J1/02; H03J1/04; H03J1/045; H03J1/047; H03J1/048; H03K; H03K21/00; H03K21/08
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
143 words
A character display device comprising: a first digital storage means for storing the information of characters to be displayed; a display means; information input means connected to an input of said first digital storage means; a throughput means; an output of said first digital storage means being connectable to an information input of said display means by way of a throughput means; a control circuit connected to said display means for cycling said display means through successive cycles between a maximum display characteristic and a minimum display characteristic while maintaining predetermined maxima for the temporal variations in display actuation; synchronizing means having a control input connected to an output of said control circuit and an output connected to said throughput means for controlling transmission of modified information to said first digital storage means, only starting from a predetermined phase of said control circuit.
Claim 2
Dependent Claim
143 words
A character display device comprising: a first digital storage means for storing the information of characters to be displayed; a display means; information input means connected to an input of said first digital storage means; a throughput means; an output of said first digital storage means being connectable to an information input of said display means by way of a throughput means; a control circuit connected to said display means for cycling said display means through successive cycles between a maximum display characteristic and a minimum display characteristic while maintaining predetermined maxima for the temporal variations in display actuation; synchronizing means having a control input connected to an output of said control circuit and an output connected to said throughput means for controlling transmission of modified information to said first digital storage means, only starting from a predetermined phase of said control circuit.
Claim 3
Dependent Claim
26 words
A character display device as claimed in claim 1, wherein said synchronizing means is operative for giving a drive signal substantially upon minimum display actuation times.
Claim 4
Dependent Claim
20 words
A character display device as claimed in claim 1, wherein said control circuit comprises a substantially non-smoothed AC-voltage rectifier circuit.
Claim 5
Dependent Claim
23 words
A character display device according to claim 3, wherein said synchronizing means is adapted for driving said throughput means for successive current minima.
Claim 6
Dependent Claim
66 words
A character display device as claimed in claim 4, wherein: said first storage means is adapted for continually storing character information upon reception thereof; and wherein said throughput means comprises a second digital storage means adapted for taking over the information from said first storage means upon reception of a signal from said sychronizing means and for continually delivering its output signals to said display means.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1983-11-25 | 1984-05-26 | 1984-11-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-11-25 | 1988-05-26 | 1988-11-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-11-25 | 1992-05-26 | 1992-11-25 | $7700.00 | Window Closed / Lapsed |