Patent US4026102A successfully refreshed from Google Patents.
US4026102A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electronic clock
Assignee: TOPP ELECTRONICS Inc
•
Filing: 1975-03-18
•
Granted: 1977-05-31
•
Expires: 1995-03-18
Abstract
Abstract A numerical display unit formed by light emitting diode segments, is directly driven by the field effect transistors associated with an integrated timer circuit chip. A DC driving current is supplied to common electrodes of the transistors while the light emitting diodes are interconnected in a corresponding common electrode arrangement so that the same driving current is conducted through each of the transistors and associated light emitting diodes.
Inventors
- 👤 Leon S. Wecker
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 14:51
CPC Classifications
G; G04; G04G; G04G9/00; G04G9/08; G04G9/10; G04C; G04C23/00; G04C23/02; G04C23/12; G04G19/00
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
140 words
In combination with a timer circuit having a plurality of transistors interconnected in a common electrode configuration for drive from a common supply of voltage, a display device comprising a plurality of light emitting components having common electrodes interconnected in parallel, a plurality of series circuits respectively formed by at least one of the light emitting components connected in series with the controllable path of one of the transistors, said transistors having control electrodes operated by the timer circuit, means directly interconnecting the common supply of voltage and the common electrodes of the light emitting components for conducting the same driving current through each of the series circuits, and a rectifier circuit connected to the common supply having opposite polarity terminals, said interconnecting means being connected between one of the terminals and the common electrodes of the light emitting components.
Claim 2
Dependent Claim
140 words
In combination with a timer circuit having a plurality of transistors interconnected in a common electrode configuration for drive from a common supply of voltage, a display device comprising a plurality of light emitting components having common electrodes interconnected in parallel, a plurality of series circuits respectively formed by at least one of the light emitting components connected in series with the controllable path of one of the transistors, said transistors having control electrodes operated by the timer circuit, means directly interconnecting the common supply of voltage and the common electrodes of the light emitting components for conducting the same driving current through each of the series circuits, and a rectifier circuit connected to the common supply having opposite polarity terminals, said interconnecting means being connected between one of the terminals and the common electrodes of the light emitting components.
Claim 3
Dependent Claim
24 words
The combination of claim 1 wherein the other of the terminals is connected to the timer circuit and the common electrodes of the transistors.
Claim 4
Dependent Claim
158 words
In combination with a timer circuit having a plurality of transistors interconnected in a common electrode configuration for drive from a common supply of voltage, a display device comprising a plurality of light emitting components having common electrodes interconnected in parallel, a plurality of series circuits respectively formed by at least one of the light emitting components connected in series with the controllable path of one of the transistors, said transistors having control electrodes operated by the timer circuit, means directly interconnecting the common supply of voltage and the common electrodes of the light emitting components for conducting the same driving current through each of the series circuits, said light emitting components being diodes interconnected in a common electrode configuration to form a numeric type of display, and said common voltage supply including a source of AC voltage to which the diodes are directly connected in parallel and rectifying means connecting the AC source to the timer circuit.
Claim 5
Dependent Claim
158 words
In combination with a timer circuit having a plurality of transistors interconnected in a common electrode configuration for drive from a common supply of voltage, a display device comprising a plurality of light emitting components having common electrodes interconnected in parallel, a plurality of series circuits respectively formed by at least one of the light emitting components connected in series with the controllable path of one of the transistors, said transistors having control electrodes operated by the timer circuit, means directly interconnecting the common supply of voltage and the common electrodes of the light emitting components for conducting the same driving current through each of the series circuits, said light emitting components being diodes interconnected in a common electrode configuration to form a numeric type of display, and said common voltage supply including a source of AC voltage to which the diodes are directly connected in parallel and rectifying means connecting the AC source to the timer circuit.
Claim 6
Dependent Claim
131 words
In combination with a timer circuit having a plurality of transistors interconnected in a common electrode configuration for drive from a common supply of voltage, a display device comprising a plurality of light emitting components having common electrodes interconnected in parallel, a plurality of series circuits respectively formed by at least one of the light emitting components connected in series with the controllable path of one of the transistors, said transistors having control electrodes operated by the timer circuit, and means directly interconnecting the common supply of voltage and the common electrodes of the light emitting components for conducting the same driving current through each of the series circuits said common voltage supply including an AC source and rectifying means connecting the source directly to the light emitting components in parallel.
Claim 7
Dependent Claim
131 words
In combination with a timer circuit having a plurality of transistors interconnected in a common electrode configuration for drive from a common supply of voltage, a display device comprising a plurality of light emitting components having common electrodes interconnected in parallel, a plurality of series circuits respectively formed by at least one of the light emitting components connected in series with the controllable path of one of the transistors, said transistors having control electrodes operated by the timer circuit, and means directly interconnecting the common supply of voltage and the common electrodes of the light emitting components for conducting the same driving current through each of the series circuits said common voltage supply including an AC source and rectifying means connecting the source directly to the light emitting components in parallel.
Claim 8
Dependent Claim
19 words
The combination of claim 1 wherein said transistors are of the P-channel type connected in a common source configuration.
Claim 9
Dependent Claim
18 words
The combination of claim 5 wherein said light emitting components are diodes interconnected in a common cathode configuration.
Claim 10
Dependent Claim
14 words
The combination of claim 6 wherein the driving current has a periodically varying characteristic.
Claim 11
Dependent Claim
22 words
The combination of claim 7 wherein the common voltage has a positive polarity terminal connected to the common electrodes of the transistors.
Claim 12
Dependent Claim
18 words
The combination of claim 3 wherein said light emitting components are diodes interconnected in a common cathode configuration.
Claim 13
Dependent Claim
14 words
The combination of claim 3 wherein the driving current has a periodically varying characteristic.
Claim 14
Dependent Claim
21 words
The combination of claim 1 wherein said display device includes numeric image forming segments respectively formed by said light emitting components.
Claim 15
Dependent Claim
42 words
The combination of claim 1 wherein said transistors are of the P-channel type connected in a common drain configuration and receiving a negative driving current from the common voltage supply, the light emitting components being diodes interconnected in a common anode configuration.
Claim 16
Dependent Claim
37 words
The combination of claim 1 wherein said transistors are of the N-channel type connected in a common source configuration and receiving a negative driving current, the light emitting components being diodes interconnected in a common anode configuration.
Claim 17
Dependent Claim
37 words
The combination of claim 1 wherein said transistors are of the N-channel type connected in a common drain configuration and receiving a positive driving current, the light emitting components being diodes interconnected in a common cathode configuration.
References Cited (Backward Citations)
US3443151A
Cited
US3388292A
Cited
US3655442A
Cited
US3630015A
Cited
US3672155A
Cited
US3666960A
Cited
US3823551A
Cited
US3755697A
Cited
US3759031A
Cited
US3813533A
Cited
US3755679A
Cited
US3878406A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-05-30 | 1980-11-29 | 1981-05-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-05-30 | 1984-11-29 | 1985-05-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-05-30 | 1988-11-29 | 1989-05-31 | $7700.00 | Window Closed / Lapsed |