EP0304916A1
Expired / Lapsed
EP
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Thermal printing control circuit
Assignee: SUSUMU INDUSTRIAL Co Ltd
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Filing: 1988-08-25
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Granted: —
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Expires: 2008-08-25
Abstract
Abstract A thermal printing control circuit includes a first shift register (104) for receiving and storing a series of serial printing image data (D) to be printed by a plurality of thermal print elements, a second register, constituted by a plurality of registers (105-109) for storing contents of the first shift register (104) by parallelly and sequentially shifting and receiving the contents thereof, for storing printing history data of a plurality of cycles of the thermal print elements, and a logic circuit (140) for performing a logic operation by using the printing history data of the plurality of cycles of the plurality of thermal print elements, the printing history data being stored in the second shift register (105-109), and externally supplied control timing signals (T o , T A , T B , T C , T D ) and for generating drive signals representing voltage waveforms to be applied to the plurality of thermal print elements.
Inventors
- 👤 Hisashi C/O Susumu Co. Ltd. Deguchi
- 👤 Takashi C/O Susumu Co. Ltd. Okamoto
- 👤 Itaru Fukushima
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-09 17:53
CPC Classifications
B; B41; B41J; B41J2/00; B41J2/315; B41J2/32; B41J2/35; B41J2/355; B41J2/3555
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
139 words
A thermal printing control circuit comprising: a first shift register for receiving and storing a series of serial printing image data to be printed by a plurality of thermal print elements; a second register, constituted by a plurality of registers for storing contents of said first shift register by parallelly and sequentially shifting and receiving the contents thereof, for storing printing history data of a plurality of cycles of said thermal print elements; and a logic circuit for performing a logic operation by using the printing history data of the plurality of cycles of said plurality of thermal print elements, the printing history data being stored in said second shift register, and externally supplied control timing signals and for generating drive signals representing voltage waveforms to be applied in a current cycle to said plurality of thermal print elements.
Claim 2
Dependent Claim
139 words
A thermal printing control circuit comprising: a first shift register for receiving and storing a series of serial printing image data to be printed by a plurality of thermal print elements; a second register, constituted by a plurality of registers for storing contents of said first shift register by parallelly and sequentially shifting and receiving the contents thereof, for storing printing history data of a plurality of cycles of said thermal print elements; and a logic circuit for performing a logic operation by using the printing history data of the plurality of cycles of said plurality of thermal print elements, the printing history data being stored in said second shift register, and externally supplied control timing signals and for generating drive signals representing voltage waveforms to be applied in a current cycle to said plurality of thermal print elements.
Claim 3
Dependent Claim
69 words
A circuit according to claim 1, wherein said logic circuit divides a plurality of bit positions adjacent to each bit position in said second shift register in terms of time and space into a plurality of groups, and determines a voltage waveform to be applied to a print element corresponding to the each bit position on the basis of printing histories at bit positions of each of said groups.
Claim 4
Dependent Claim
208 words
A thermal printing control circuit comprising: a plurality of integrated circuits each of which can control N thermal print elements; and connecting means for connecting said plurality of integrated circuits to each other; said integrated circuit including: a (N+M)-bit first shift register for receiving and storing a series of serial printing image data to be printed by said N thermal print elements, where M is larger than one; a second register, constituted by a plurality of (N+M)-bit registers for storing contents of said first shift register by parallelly and sequentially shifting and receiving the contents thereof, for storing printing history data of a plurality of cycles of said N thermal print elements; and a logic circuit for performing a logic operation by using the printing history data of the plurality of cycles of said N thermal print elements, the printing history data being stored in said second shift register, and externally supplied control timing data and for generating drive signals representing voltage waveforms to be applied to said N thermal print elements in a current cycle, wherein said connecting means connects an input terminal of said first shift register of one of said integrated circuit to intermediate bit outputs of said first shift registers of other integrated circuits.
Claim 5
Dependent Claim
208 words
A thermal printing control circuit comprising: a plurality of integrated circuits each of which can control N thermal print elements; and connecting means for connecting said plurality of integrated circuits to each other; said integrated circuit including: a (N+M)-bit first shift register for receiving and storing a series of serial printing image data to be printed by said N thermal print elements, where M is larger than one; a second register, constituted by a plurality of (N+M)-bit registers for storing contents of said first shift register by parallelly and sequentially shifting and receiving the contents thereof, for storing printing history data of a plurality of cycles of said N thermal print elements; and a logic circuit for performing a logic operation by using the printing history data of the plurality of cycles of said N thermal print elements, the printing history data being stored in said second shift register, and externally supplied control timing data and for generating drive signals representing voltage waveforms to be applied to said N thermal print elements in a current cycle, wherein said connecting means connects an input terminal of said first shift register of one of said integrated circuit to intermediate bit outputs of said first shift registers of other integrated circuits.
References Cited (Backward Citations)
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