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EP0051227A2
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EP
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Picture information input apparatus
Assignee: Toshiba Corp
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Filing: 1981-10-23
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Granted: —
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Expires: 2001-10-23
Abstract
Abstract A picture information input apparatus has a leading and trailing end detecting circuit (42) for detecting the leading and trailing ends of a document to produce read out signals of "1" and "0". The leading and trailing end detecting circuit (42) starts a first count by a document presence detecting signal of "0" from a detecting unit (54) which detects the transfer of the document. When a hole of the document is smaller than an allowable hole diameter, it clears the counting. Only when the hole is larger than the allowable hole diameter, it starts a second count. After the second count ends, it produces a read out signal of "0" indicating that the trailing edge of the document is detected. A picture bus control circuit (44) receives the read out signal of "1" to transmit a picture data signal to a picture transceiver (48), and receives the read out signal of "0" to stop the transmission of the picture data signal.
Inventors
- 👤 Junichi Daigo
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-02 20:07
CPC Classifications
H; H04; H04N; H04N1/00; H04N1/00681; H04N1/00684; H04N1/00687; G; G06; G06K; G06K7/00; G06K7/01; G06K7/016; H04N1/00708; H04N1/00742; H04N1/00745; H04N1/00763; H04N1/00774; H04N1/00782; H04N1/024; H04N1/028; H04N1/02815; H04N1/0282; H04N1/0283; H04N1/04; H04N1/047; H04N1/12; H04N1/19; H04N1/191; H04N1/192; H04N1/193; H04N2201/00; H04N2201/024; H04N2201/02406; H04N2201/02425; H04N2201/028; H04N2201/03; H04N2201/031; H04N2201/03104; H04N2201/03108; H04N2201/0315; H04N2201/03158; H04N2201/04; H04N2201/047; H04N2201/04701; H04N2201/0471; H04N2201/04729; H04N2201/04731; H04N2201/04732; H04N2201/04734; H04N2201/04737; H04N2201/04744; H04N2201/04746; H04N2201/04753; H04N2201/04756; H04N2201/04758; H04N2201/04767; H04N2201/04789; H04N2201/04791
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
301 words
A picture information input apparatus in which an object being transferred by transfer means is optically scanned, the light reflected from the object is converted into electrical signals by photoelectric converting means, the electrical signals are converted into digital signals by A/D converting means, the digital signals thus obtained are transferred to picture data transmitting means, and the digital signals are then transmitted from the picture data transmitting means, characterized in that there are provided: optical scanning means (62) for optically irradiating and scanning said object, thereby to produce synchronizing signals in synchronism with said scannings; detecting means (54) for detecting at least the transfer of said object, thereby to produce a signal "1" or "0" representing the presence or absence of the object; leading and trailing end detecting means (42) for detecting the leading end of said object on the basis of the signal from said photoelectric converting means and the synchronizing signals from said optical scanning means (62) thereby to produce a read out signal "1", for starting a first counting upon receipt of an object presence-absence signal "0" from said detecting means (54) when said detecting means (54) detects an opening of said object, for resetting the first count to zero when said opening has a diameter smaller than an allowable opening diameter of said object, for starting a second counting when said opening has a diameter larger than the allowable opening diameter, and for producing a signal "0" upon completion of the second counting and at the same time resetting both the first count and the second count to zero; and drive means (64) for driving said transfer means in accordance with at least the object presence-absence signal from said detecting means (54) and the read out signal from said leading and trailing end detection means (42).
Claim 2
Dependent Claim
301 words
A picture information input apparatus in which an object being transferred by transfer means is optically scanned, the light reflected from the object is converted into electrical signals by photoelectric converting means, the electrical signals are converted into digital signals by A/D converting means, the digital signals thus obtained are transferred to picture data transmitting means, and the digital signals are then transmitted from the picture data transmitting means, characterized in that there are provided: optical scanning means (62) for optically irradiating and scanning said object, thereby to produce synchronizing signals in synchronism with said scannings; detecting means (54) for detecting at least the transfer of said object, thereby to produce a signal "1" or "0" representing the presence or absence of the object; leading and trailing end detecting means (42) for detecting the leading end of said object on the basis of the signal from said photoelectric converting means and the synchronizing signals from said optical scanning means (62) thereby to produce a read out signal "1", for starting a first counting upon receipt of an object presence-absence signal "0" from said detecting means (54) when said detecting means (54) detects an opening of said object, for resetting the first count to zero when said opening has a diameter smaller than an allowable opening diameter of said object, for starting a second counting when said opening has a diameter larger than the allowable opening diameter, and for producing a signal "0" upon completion of the second counting and at the same time resetting both the first count and the second count to zero; and drive means (64) for driving said transfer means in accordance with at least the object presence-absence signal from said detecting means (54) and the read out signal from said leading and trailing end detection means (42).
Claim 3
Dependent Claim
157 words
The picture information input apparatus according to claim 1, characterized in that said leading and trailing end detecting means (42) comprises: a leading end detecting circuit (108 - 120) for detecting the leading end of said object in accordance with a signal from said photoelectric converting means (58) and synchronizing signals from said optical scanning means (62); a flip-flop circuit (122) which is set by a signal transmitted from said leading end detecting circuit (108 - 120) to produce a "1" read out signal; and a trailing end detecting circuit (126 - 146) which starts a first counting in response to an object presence detecting signal of "0" transmitted from said detecting means (54), resets the first count to zero when said opening is smaller than the allowable opening diameter of said object, starts a second counting following the end of said first counting, and resets said flip-flop circuit (122) following the end of said second counting.
Claim 4
Dependent Claim
198 words
The picture information input apparatus according to claim 2, characterized in that said trailing end detecting circuit (126 - 146) comprises: a first counter circuit (126 - 134) which starts a counting operation in response to an object presence detecting signal of "0" transmitted from said detecting means (54), with at least a period of time corresponding to an allowable hole diameter of said object being set, is reset by an object presence detecting signal of "1" transmitted from said detecting means when said opening is smaller than the allowable hole diameter of said object, and produces a signal as the count reaches said set time when said opening is larger than the allowable hole diameter of said object; and a second counter circuit (136 - 140) which starts the counting operation in response to a signal from said first counting circuit (126 - 134) and transmits a signal used for resetting said flip-flop circuit (122) when the counting ends, with a period of time being set that is obtained by subtracting the setting time of said first counter circuit (126 - 134) from the transfer time from the detection of said object to the optical scanning portion.
Claim 5
Dependent Claim
208 words
The picture information input apparatus according to claim 1, characterized in that said optical scanning means (62) comprises: a laser generator (66 - 76) for generating laser beams in two directions; an optical scanner (78 - 84) which forms an optical scanning beam by continuously reflecting one of said two directional laser beams at one surface of a mirror, and for forming a synchronizing beam by continuously reflecting the other laser beam by the other surface of said mirror; a first synchronizing signal generator (88, 90) which receives said synchronizing laser beam from said optical scanner (78 - 84) to transmit a signal every scanning by the laser beam; a converter (86, 92) which is irradiated with the synchronizing beam from said optical scanner (78 - 84), and converts the beam into an ON-OFF beam; a second synchronizing signal generator (94) which receives the ON-OFF beams from said converter to produce a synchronizing signal with the number of pulses corresponding to the ON's and OFF's of said ON-OFF beam; and a third synchronizing signal generator (46) for transmitting signals from said second synchronizing signal generator masked for a given period of time as synchronizing signals in accordance with signals transmitted from said first and second synchronizing signal generators.
Claim 6
Dependent Claim
145 words
The picture information input apparatus according to claim 4, characterized in that said third synchronizing signal generator (46) comprises: a first counter (96 - 100) which has a given value set by the signal from said first synchronizing signal generator (88, 90), executes the counting by the signals from said second synchronizing signal generator (88, 90), and produces a signal when the count reaches said given value; and a second counter (102 - 106) which has a given value previously set, executes the counting operation in response to the presence of at least the signals from said counter and the signals from said second synchronizing signal generator (94), transmits the signals from said second synchronizing signal generator (94) as new synchronizing signals during the counting operation, and stops the counting operation and the transmitting of the signal when the count thereof reaches said given value.
References Cited (Backward Citations)
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