Patent US3836813A successfully refreshed from Google Patents.
US3836813A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Power supply for use with a display system
Assignee: Raytheon Co
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Filing: 1973-09-14
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Granted: 1974-09-17
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Expires: 1993-09-14
Abstract
Abstract A synchronized power supply for use with display systems and data processing equipment in general in which information is displayed on a screen such as a cathode ray tube in which the power supply is synchronized to the display such that internal synchronization is maintained regardless of variation in external synchronization. A unique converter arrangement transfers regulated power to the loads at high efficiency such that both improved power supply and display operation result.
Inventors
- 👤 D Chambers
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 11:21
CPC Classifications
G; G09; G09G; G09G1/00; G09G1/005
Claims Analysis
Total Claims: 24
Claim 1
Independent Claim
126 words
A data processing system comprising: central data storage means; a plurality of local data storage means coupled to said central data storage means; a plurality of data retrieval means coupled to each of said plurality of local data storage means for accessing data contained in said local data storage means without accessing said central data storage means; and power supply means coupled to said plurality of local data storage means and to said plurality of data retrieval means, said power supply means supplying the major portion of operating power to said plurality of local data storagE means and to said plurality of data retrieval means, variations in the output of said power supply means being in synchronism with a cyclic characteristic of said data retrieval means.
Claim 2
Dependent Claim
126 words
A data processing system comprising: central data storage means; a plurality of local data storage means coupled to said central data storage means; a plurality of data retrieval means coupled to each of said plurality of local data storage means for accessing data contained in said local data storage means without accessing said central data storage means; and power supply means coupled to said plurality of local data storage means and to said plurality of data retrieval means, said power supply means supplying the major portion of operating power to said plurality of local data storagE means and to said plurality of data retrieval means, variations in the output of said power supply means being in synchronism with a cyclic characteristic of said data retrieval means.
Claim 3
Dependent Claim
33 words
A data processing system in accordance with claim 1 wherein said data retrieval means comprise visual displays on which data is displayed on the face of a display tube in a raster pattern.
Claim 4
Dependent Claim
30 words
A data processing system in accordance with claim 2 wherein said cyclic characteristic of said data retrieval means corresponds to the time required to generate one line of the display.
Claim 5
Dependent Claim
22 words
A data processing system in accordance with claim 3 wherein said display is a dot matrix display on a cathode ray tube.
Claim 6
Dependent Claim
44 words
A data processing system in accordance with claim 3 wherein said central data storage means is a digital computer and wherein said plurality of local data storage means are individually programmable units, each of which controls the data displayed on a plurality of displays.
Claim 7
Dependent Claim
45 words
A data processing system in accordance with claim 5 wherein said power supply means includes a synchronization means capable of being triggered by an external pulse; and means for triggering said synchronization means when said external pulse does not occur within a predetermined time duration.
Claim 8
Dependent Claim
21 words
A data processing system in accordance with claim 6 wherein said external pulse is derived from said local data storage means.
Claim 9
Dependent Claim
35 words
A data processing system in accordance with claim 6 wherein said power supply means is synchronized by said means for triggering said synchronization means when said external pulse does not occur within a predetermined time.
Claim 10
Dependent Claim
45 words
A data processing system in accordance with claim 5 wherein said power supply means includes a synchronization means capable of being triggered by an external pulse; and means for triggering said synchronization means when said external pulse does not occur within a predetermined time duration.
Claim 11
Dependent Claim
55 words
A data processing system in accordance with claim 2 wherein each of said power supply means includes: a switching element to which DC power is supplied; and means for maintaining a voltage across said switching element only after switching ON or OFF has occurred such that heat generation in said switching element is substantially reduced.
Claim 12
Dependent Claim
46 words
A data processing system in accordance with claim 10 wherein said switching element is a transistor and wherein said power switched by said transistor is an asymmetric waveform of high voltage peaks during the transistor OFF time and low voltage power during the transistor ON time.
Claim 13
Dependent Claim
100 words
A visual display system comprising: a data storage means; a plurality of visual displays on which data is displayed on the face of a display tube wherein each of said displays is supplied data by said data storage means; power supply means for supplying the major portion of operating power to said system, variations in the output of said power supply means being in synchronism with the rate at which data is displayed on said visual displays; and means for providing synchronization of said system such that internal synchronization occurs automatically upon the loss of external synchronization without data loss.
Claim 14
Dependent Claim
100 words
A visual display system comprising: a data storage means; a plurality of visual displays on which data is displayed on the face of a display tube wherein each of said displays is supplied data by said data storage means; power supply means for supplying the major portion of operating power to said system, variations in the output of said power supply means being in synchronism with the rate at which data is displayed on said visual displays; and means for providing synchronization of said system such that internal synchronization occurs automatically upon the loss of external synchronization without data loss.
Claim 15
Dependent Claim
26 words
A visual display system in accordance with claim 12 wherein said last mentioned means is adapted to allow said external synchronization to vary between predetermined limits.
Claim 16
Dependent Claim
23 words
A visual display system in accordance with claim 13 wherein internal synchronization is provided only when said external synchronization exceeds said predetermined limits.
Claim 17
Dependent Claim
51 words
A visual display system in accordacne with claim 12 wherein said power supply means includes a regulated DC-to-DC converter for supplying an asymmetric power waveform to said system from that power is transferred to said displays and to said data storage means only during the ON time of said DC-to-DC converter.
Claim 18
Dependent Claim
27 words
A visual display system in accordance with claim 15 further iNcluding rectification means for rectifying the converted power only during the ON time of said DC-to-DC converter.
Claim 19
Dependent Claim
37 words
The visual display system in accordance with claim 15 further including means synchronized to the frequency of said DC-to-DC converter for supplying the high voltage to said visual displays in addition to a plurality of low voltages.
Claim 20
Dependent Claim
32 words
A visual display system in accordance with claim 17 wherein said display tube is a cathode ray tube and wherein said high voltage is the anode voltage of said cathode ray tube.
Claim 21
Dependent Claim
24 words
A visual display system in accordance with claim 15 wherein said regulated DC-to-DC is synchronized to a switching regulator by an external synchronization source.
Claim 22
Dependent Claim
46 words
A visual display system in accordance with claim 19 wherein said synchronization rate is variable within predetermined limits of variation of said external synchronization source and wherein internal synchronization is provided by means for developing internal synchronization when said external synchronization source exceeds said predetermined limits.
Claim 23
Dependent Claim
20 words
A visual display system in accordance with claim 19 wherein said switching regulator is a pulse width modulated switching regulator.
Claim 24
Dependent Claim
45 words
A visual display system in accordance with claim 19 wherein said DC-to-DC converter includes a single switching transistor for converting said regulated DC voltage to said asymmetric waveform; and means for maintaining a voltage across said transistor only after switching ON or OFF has occurred.
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) | 1977-09-16 | 1978-03-18 | 1978-09-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-09-16 | 1982-03-18 | 1982-09-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-09-16 | 1986-03-18 | 1986-09-17 | $7700.00 | Window Closed / Lapsed |