US3573438A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Thermally controlled optoelectronic display device
Assignee: AT&T Inc
•
Filing: 1967-07-19
•
Granted: 1971-04-06
•
Expires: 1987-07-19
Abstract
Abstract A shift register includes a plurality of modules connected in parallel, each of the modules comprising a variable resistivity element disposed adjacent to a heating resistor. In order that a pulse propagate from one module to the next, the heating resistor of each module is made responsive to the state of the variable resistivity element of the next preceding module. The shift register has application as a scanner for optoelectronic display panels.
Inventors
- 👤 John H Rowen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 23:22
CPC Classifications
H; H03; H03K; H03K17/00; H03K17/51; H03K17/78; G; G11; G11C; G11C19/00; H03K3/00; H03K3/02; H03K3/027; H03K3/038
Claims Analysis
Total Claims: 20
Claim 1
Independent Claim
250 words
A display device comprising in combination: a. a plurality of shift modules connected in parallel, said shift modules each comprising: 1. a thermoresistive first element characterized by a metalsemiconductor phase transition at a particular transition temperature; 2. means for switching said thermoresistive first element from a high to a low resistivity state comprising resistive means for heating said first element to its transition temperature, said heating means being disposed in good heat exchange relationship with said thermoresistive first element and being electrically connected in series with the thermoresistive first element of the next preceding of said modules; b. means for sequentially switching said shift modules comprising means for applying a heat pulse to the thermoresistive first element of one of said shift modules; c. a plurality of optoelectronic modules connected in parallel, each of said optoelectronic modules being thermally coupled to, and electrically isolated from, a separate one of said shift modules; and d. said optoelectronic modules each comprising: 1. a thermoresistive second element characterized by a metalsemiconductor phase transition at a particular transition temperature, 2. an electroluminescent diode electrically connected in series with said thermoresistive second element, and and 3. means for applying a modulating voltage across each of said electroluminescent diodes, 4. said thermoresistive second element of said optoelectronic module being disposed in good heat exchange relationship with said heating means of its associated shift module so as to be switched to a low resistivity state, thereby to activate said electroluminescent diode in response to said modulating voltage.
Claim 2
Dependent Claim
250 words
A display device comprising in combination: a. a plurality of shift modules connected in parallel, said shift modules each comprising: 1. a thermoresistive first element characterized by a metalsemiconductor phase transition at a particular transition temperature; 2. means for switching said thermoresistive first element from a high to a low resistivity state comprising resistive means for heating said first element to its transition temperature, said heating means being disposed in good heat exchange relationship with said thermoresistive first element and being electrically connected in series with the thermoresistive first element of the next preceding of said modules; b. means for sequentially switching said shift modules comprising means for applying a heat pulse to the thermoresistive first element of one of said shift modules; c. a plurality of optoelectronic modules connected in parallel, each of said optoelectronic modules being thermally coupled to, and electrically isolated from, a separate one of said shift modules; and d. said optoelectronic modules each comprising: 1. a thermoresistive second element characterized by a metalsemiconductor phase transition at a particular transition temperature, 2. an electroluminescent diode electrically connected in series with said thermoresistive second element, and and 3. means for applying a modulating voltage across each of said electroluminescent diodes, 4. said thermoresistive second element of said optoelectronic module being disposed in good heat exchange relationship with said heating means of its associated shift module so as to be switched to a low resistivity state, thereby to activate said electroluminescent diode in response to said modulating voltage.
Claim 3
Dependent Claim
122 words
means for switching said thermoresistive first element from a high to a low resistivity state comprising resistive means for heating said first element to its transition temperature, said heating means being disposed in good heat exchange relationship with said thermoresistive first element and being electrically connected in series with the thermoresistive first element of the next preceding of said modules; b. means for sequentially switching said shift modules comprising means for applying a heat pulse to the thermoresistive first element of one of said shift modules; c. a plurality of optoelectronic modules connected in parallel, each of said optoelectronic modules being thermally coupled to, and electrically isolated from, a separate one of said shift modules; and d. said optoelectronic modules each comprising:
Claim 4
Dependent Claim
122 words
means for switching said thermoresistive first element from a high to a low resistivity state comprising resistive means for heating said first element to its transition temperature, said heating means being disposed in good heat exchange relationship with said thermoresistive first element and being electrically connected in series with the thermoresistive first element of the next preceding of said modules; b. means for sequentially switching said shift modules comprising means for applying a heat pulse to the thermoresistive first element of one of said shift modules; c. a plurality of optoelectronic modules connected in parallel, each of said optoelectronic modules being thermally coupled to, and electrically isolated from, a separate one of said shift modules; and d. said optoelectronic modules each comprising:
Claim 5
Dependent Claim
14 words
an electroluminescent diode electrically connected in series with said thermoresistive second element, and and
Claim 6
Dependent Claim
14 words
an electroluminescent diode electrically connected in series with said thermoresistive second element, and and
Claim 7
Dependent Claim
35 words
A display device comprising in combination a. a plurality of shift modules connected in parallel, said shift modules each comprising: a thermoresistive first element characterized by a metal-semiconductor phase transition at a particular transition temperature;
Claim 8
Dependent Claim
35 words
A display device comprising in combination a. a plurality of shift modules connected in parallel, said shift modules each comprising: a thermoresistive first element characterized by a metal-semiconductor phase transition at a particular transition temperature;
Claim 9
Dependent Claim
121 words
means for switching said thermoresistive first element from a high to a low resistivity state comprising resistive means for heating said first element to its transition temperature, said heating means being disposed in good heat exchange relationship with said thermoresistive first element and being electrically connected in series with the thermoresistive first element of the next preceding of said modules; b. means for sequentially switching said shift modules comprising means for applying a heat pulse to the thermoresistive first element of one of said shift modules; c. a plurality of optoelectronic modules connected in parallel, each of said optoelectronic modules being thermally coupled to, and electrically isolated from, a separate one of said shift modules; d. said optoelectronic modules each comprising:
Claim 10
Dependent Claim
121 words
means for switching said thermoresistive first element from a high to a low resistivity state comprising resistive means for heating said first element to its transition temperature, said heating means being disposed in good heat exchange relationship with said thermoresistive first element and being electrically connected in series with the thermoresistive first element of the next preceding of said modules; b. means for sequentially switching said shift modules comprising means for applying a heat pulse to the thermoresistive first element of one of said shift modules; c. a plurality of optoelectronic modules connected in parallel, each of said optoelectronic modules being thermally coupled to, and electrically isolated from, a separate one of said shift modules; d. said optoelectronic modules each comprising:
Claim 11
Dependent Claim
33 words
a plurality of electroluminescent diodes each being responsive to modulating information impressed across thereacross to emit radiation at mutually distinct wavelengths, and being electRically connected in series with said thermoresistive second element; and
Claim 12
Dependent Claim
33 words
a plurality of electroluminescent diodes each being responsive to modulating information impressed across thereacross to emit radiation at mutually distinct wavelengths, and being electRically connected in series with said thermoresistive second element; and
Claim 13
Dependent Claim
16 words
means for applying a separate modulating voltage across each one of said plurality of electroluminescent diodes;
Claim 14
Dependent Claim
16 words
means for applying a separate modulating voltage across each one of said plurality of electroluminescent diodes;
Claim 15
Dependent Claim
12 words
means for applying a modulating voltage across each of said electroluminescent diodes,
Claim 16
Dependent Claim
12 words
means for applying a modulating voltage across each of said electroluminescent diodes,
Claim 17
Dependent Claim
46 words
said thermoresistive second element of said optoelectronic module being disposed in good heat exchange relationship with said heating means of its associated shift module so as to be switched to a low resistivity state, thereby to activate said electroluminescent diode in response to said modulating voltage.
Claim 18
Dependent Claim
46 words
said thermoresistive second element of said optoelectronic module being disposed in good heat exchange relationship with said heating means of its associated shift module so as to be switched to a low resistivity state, thereby to activate said electroluminescent diode in response to said modulating voltage.
Claim 19
Dependent Claim
45 words
said thermoresistive second element being disposed in good heat exchange relationship with the heating means of its associated shift module so as to be switched to a low resistivity state, thereby to activate each of said electroluminescent diodes separately in response to said separate voltages.
Claim 20
Dependent Claim
45 words
said thermoresistive second element being disposed in good heat exchange relationship with the heating means of its associated shift module so as to be switched to a low resistivity state, thereby to activate each of said electroluminescent diodes separately in response to said separate voltages.
References Cited (Backward Citations)
US2907001A
Cited
US3132325A
Cited
US3020410A
Cited
US3402131A
Cited
US3461316A
Cited
US3483140A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-04-05 | 1974-10-05 | 1975-04-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-04-05 | 1978-10-05 | 1979-04-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-04-05 | 1982-10-05 | 1983-04-06 | $7700.00 | Window Closed / Lapsed |