US5659367A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Television on/off detector for use in a video cassette recorder
Assignee: Adeia Guides Inc
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Filing: 1994-12-30
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Granted: 1997-08-19
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Expires: 2014-12-30
Abstract
Abstract An apparatus for providing a television guide includes a device for detecting whether a television is off, a device for switching a signal output from a first television signal source to a second television signal source, if television guide data is not contained in the signal output from the first television signal source when the device for detecting detects that the television is off, a device for extracting the television guide data from the signal output when the device for detecting detects that the television is off, and memory for storing the extracted television guide data. In another embodiment an apparatus for providing a directory for transmitted and recorded programs, includes a device for detecting whether a television is off, a device for switching a signal output from a first television signal source to a second television signal source, if a directory is not contained in the signal output from the first television signal source when the device for detecting detects that the television is off, a device for extracting the directory from the signal output when the device for detecting detects that the television is off, a recorder for recording the transmitted programs, and a memory for storing the extracted directory.
Inventors
- 👤 Henry C. Yuen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 01:54
CPC Classifications
H; H04; H04N; H04N7/00; H04N7/08; H04N7/087; H04N7/088; H04N7/0884; H04N5/00; H04N5/76; H04N5/765; H04N5/78; H04N5/782; H04N7/0887; H04B; H04B1/00; H04B1/06; H04B1/16; H04B1/1607; H04B1/1615; H04N5/44; H04N5/445; H04N5/63
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
157 words
An apparatus for deriving a television guide, the apparatus comprising: means for generating a signal representative of electromagnetic radiation from the picture tube of a television; means for detecting the amplitude of the signal; means for comparing the amplitude of the signal to a predetermined threshold value above which the television is turned on; means for coupling a first television signal source to a signal output; means for determining whether television guide data is contained in the signal output at a given time; means for switching the signal output from the first television signal source to a second television signal source, if television guide data is not contained in the signal output from the first television signal source at the given time; means responsive to the comparing means for extracting the television guide data from the signal output at the given time when the television is turned off; and means for storing the extracted television guide data.
Claim 2
Independent Claim
157 words
An apparatus for deriving a television guide, the apparatus comprising: means for generating a signal representative of electromagnetic radiation from the picture tube of a television; means for detecting the amplitude of the signal; means for comparing the amplitude of the signal to a predetermined threshold value above which the television is turned on; means for coupling a first television signal source to a signal output; means for determining whether television guide data is contained in the signal output at a given time; means for switching the signal output from the first television signal source to a second television signal source, if television guide data is not contained in the signal output from the first television signal source at the given time; means responsive to the comparing means for extracting the television guide data from the signal output at the given time when the television is turned off; and means for storing the extracted television guide data.
Claim 3
Dependent Claim
13 words
The apparatus of claim 1, in which the generating means comprises an antenna.
Claim 4
Dependent Claim
38 words
The apparatus of claim 2, in which the generating means additionally comprises an amplifier and a bandpass filter coupled to the amplifier, the bandpass filter being designed to pass the frequency of electromagnetic radiation from the picture tube.
Claim 5
Dependent Claim
28 words
The apparatus of claim 1, additionally comprising means for filtering the signal before detection so the signal occupies the frequency band of electromagnetic radiation from the picture tube.
Claim 6
Dependent Claim
18 words
The apparatus of claim 4, in which the signal occupies the frequency band of the television tube sweep.
Claim 7
Dependent Claim
15 words
The apparatus of claim 1, additionally comprising a television tuner that forms the signal output.
Claim 8
Dependent Claim
23 words
The apparatus of claim 6, in which the switching means comprises a switch alternatively coupling the first and second sources to the tuner.
Claim 9
Independent Claim
179 words
A method for deriving a television program guide from television guide data transmitted with a television signal, the method comprising the steps of: detecting electromagnetic radiation from a picture tube of a television; producing from the detected electromagnetic radiation a control signal representative of its amplitude; comparing the control signal with a predetermined threshold value to determine if the television is on or off, the television being on if the control signal exceeds the threshold value and the television being off if the threshold value exceeds the control signal; determining whether television guide data is contained in a signal output at a given time; extracting the television guide data from the signal output at the given time when the threshold value exceeds the control signal; coupling a first television signal source to the signal output; switching the signal output from the first television signal source to a second television signal source, if television guide data is not contained in the signal output from the first television signal source at the given time; and storing the extracted television guide data.
Claim 10
Independent Claim
179 words
A method for deriving a television program guide from television guide data transmitted with a television signal, the method comprising the steps of: detecting electromagnetic radiation from a picture tube of a television; producing from the detected electromagnetic radiation a control signal representative of its amplitude; comparing the control signal with a predetermined threshold value to determine if the television is on or off, the television being on if the control signal exceeds the threshold value and the television being off if the threshold value exceeds the control signal; determining whether television guide data is contained in a signal output at a given time; extracting the television guide data from the signal output at the given time when the threshold value exceeds the control signal; coupling a first television signal source to the signal output; switching the signal output from the first television signal source to a second television signal source, if television guide data is not contained in the signal output from the first television signal source at the given time; and storing the extracted television guide data.
Claim 11
Dependent Claim
48 words
The method of claim 8, in which the detecting step comprises placing an antenna in the vicinity of the picture tube to intercept part of the radiation therefrom and filtering the intercepted radiation to form the control signal from one or more frequencies generated by the picture tube.
Claim 12
Dependent Claim
19 words
The method of claim 9, in which the filtering step forms the control signal from the tube sweep radiation.
References Cited (Backward Citations)
US4025851A
Cited
US5335277A
Cited
US5508815A
Cited
US4908713A
Cited
US4641205A
Cited
EP0208931A1
Cited
US4706121A
Cited
US4706121B1
Cited
US4977455B1
Cited
US4977455A
Cited
US4866434A
Cited
US5335079A
Cited
US5532732A
Cited
US5253120A
Cited
EP0393955A1
Cited
US5390027A
Cited
US5296932A
Cited
US5343251A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2000-08-18 | 2001-02-17 | 2001-08-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2004-08-18 | 2005-02-17 | 2005-08-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2008-08-18 | 2009-02-17 | 2009-08-19 | $7700.00 | Window Closed / Lapsed |