EP0465943A2
Expired / Lapsed
EP
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Text information processing apparatus having printer and printing dot signal generating apparatus for the same
Assignee: Hitachi Ltd
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Filing: 1991-06-27
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Granted: —
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Expires: 2011-06-27
Abstract
Abstract A laser beam printer comprises a frame memory (261) of one page part and a compression means (250) for compressing a dot data in the frame memory. The compression means compresses to make a compressed and encoded data. The laser beam printer (300) comprises further a memory operable for storing dividedly a plural page part of the compressed and encoded data and an extension means (250) for decoding and extending the encoded data in the memory in synchronism with a printing timing. The data compression in the frame memory and the decoding/printing of the dot data in the encoded data memory is carried out in parallel. Printing in the laser beam printer (300) can be realized at a high speed.
Inventors
- 👤 Takeshi Kato
- 👤 Shouji Saitoh
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-29 12:09
CPC Classifications
G; G06; G06K; G06K15/00; G06K15/02; G06K15/12; G06K15/128; G06K2215/00; G06K2215/0002; G06K2215/004; G06K2215/0042; G06K2215/0051; G06K2215/0062; G06K2215/0071; G06K2215/0077
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
216 words
A text information processing apparatus comprising a text data preparation means (100) for preparing a text data including a character description data and a figure description data, a memory means (221-223, 261-263) for storing a dot data to be printed, a description means (240) for developing from said text data prepared by said text data preparation means (100) the dot data to be printed and for storing said dot data to be printed into said memory means (221-223, 261-263), and a printer (300) for printing said dot data stored in said memory means (221-223, 261-263), characterized in further comprising: a dot data compression means (250) for carrying out a coding processing for compressing a redundancy degree by reading out said dot data to be printed stored in said memory means (221-223, 261-263) and for storing said encoded data in said memory means (221-223, 261-263), an encoded data extension means (250) for reading out said encoded data stored in said memory means (221-223, 261-263) from said memory means (221-223, 261-263) in response to a printing motion of said printer (300) and for carrying out an extension processing for decoding to said dot data, and a dot data output means (270) for giving said dot data prepared by said encoded data extension means (250) to said printer (300).
Claim 2
Dependent Claim
182 words
A printing dot signal generating apparatus comprising a description means (240) for developing a text data including a character description data and a figure description data to a dot data and for storing said dot data into a memory means (221-223, 261-263), and a dot data output means (270) for outputting said dot data stored in said memory means (221-223, 261-263), characterized in further comprising, a dot data compression means (250) for carrying out a coding processing for compressing a redundancy degree by reading out said dot data to be printed stored in said memory means (221-223, 261-263) and by storing said encoded data in said memory means (221-223, 261-263), an encoded data extension means (250) for reading out the encoded data stored in the memory means (221-223, 261-263), from said memory means (221-223, 261-263) in response to a printing motion of said printer (300) and for carrying out an extension processing for decoding to said dot data and a dot data output means (270) for outputting said dot data prepared by said encoded data extension means as a serial dot data.
Claim 3
Dependent Claim
57 words
An apparatus according to claim 1 or 2, characterized in that said dot data output means (270) comprises a line buffer means for storing said dot data outputted from said encoded data extension means (250) and a read-out means for reading out said dot data stored in said line buffer means in synchronism with a printing timing.
Claim 4
Independent Claim
65 words
An apparatus according to one of claims 1 to 3, characterized in that said memory means (221-223, 261,263) comprises a text data store region (222) for storing said text data, a dot data store means (261) for storing said dot data being developed from said text data, and an encoded data store means (263) for storing said encoded data being encoded from said dot data.
Claim 5
Dependent Claim
118 words
A text information processing apparatus according to claim 1, characterized in further comprising control means (210) for controlling the text preparation means (100), the memory means (221-223, 261-263), the description means (240) and the printer (300), a description processor (240) for developing said text data of one page part to a dot data to be printed in l/n page part each under a control of said control means (210) and for storing said dot data into said memory means (221-223, 261-263), wherein the dot data compression means (250) carries out a coding processing for compressing a redundancy degree by reading out said dot data to be printed of l/n page part stored in said memory means (221-223, 261-263).
Claim 6
Dependent Claim
71 words
An apparatus according to claim 5, characterized in that said memory means (221-223, 261-263) comprises a text data store region (222) for storing said text data, a dot data store means (261) for storing said dot data of l/n page part being developed from said text data, and an encoded data store means (263) for storing said encoded data of at least one page part being encoded from said dot data.
Claim 7
Dependent Claim
75 words
A printing dot signal generating apparatus according to claim 2, characterized in that said memory means (221-223, 261-263) comprises a text data store region (222) for storing said text data, a dot data store means (261) for storing said dot data of l/n page part being developed from said text data, and an encoded data store means (263) for storing said encoded data of at least one page part being encoded from said dot data.
Claim 8
Dependent Claim
55 words
An apparatus according to claim 7, characterized in that said dot data output means (270) comprises a line buffer means for storing said dot data outputted from said encoded data extension means (250), and a read-out means for reading out said dot data stored in said line buffer means in synchronism with a printing timing.
Claim 9
Independent Claim
21 words
An apparatus according to one of the preceding claims, characterized in that it carries out data compression and decoding/printing in parallel.
References Cited (Backward Citations)
No citation records indexed.
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