KR960030628A - Image processing device - Google Patents

Image processing device Download PDF

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Publication number
KR960030628A
KR960030628A KR1019950001269A KR19950001269A KR960030628A KR 960030628 A KR960030628 A KR 960030628A KR 1019950001269 A KR1019950001269 A KR 1019950001269A KR 19950001269 A KR19950001269 A KR 19950001269A KR 960030628 A KR960030628 A KR 960030628A
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KR
South Korea
Prior art keywords
image
image data
data
output
image processing
Prior art date
Application number
KR1019950001269A
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Korean (ko)
Other versions
KR0147342B1 (en
Inventor
노진태
Original Assignee
구자홍
Lg 전자주식회사
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Application filed by 구자홍, Lg 전자주식회사 filed Critical 구자홍
Priority to KR1019950001269A priority Critical patent/KR0147342B1/en
Publication of KR960030628A publication Critical patent/KR960030628A/en
Application granted granted Critical
Publication of KR0147342B1 publication Critical patent/KR0147342B1/en

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N1/00—Scanning, transmission or reproduction of documents or the like, e.g. facsimile transmission; Details thereof
    • H04N1/00127—Connection or combination of a still picture apparatus with another apparatus, e.g. for storage, processing or transmission of still picture signals or of information associated with a still picture
    • H04N1/00278—Connection or combination of a still picture apparatus with another apparatus, e.g. for storage, processing or transmission of still picture signals or of information associated with a still picture with a printing apparatus, e.g. a laser beam printer
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03M—CODING; DECODING; CODE CONVERSION IN GENERAL
    • H03M1/00—Analogue/digital conversion; Digital/analogue conversion
    • H03M1/12—Analogue/digital converters
    • H03M1/124—Sampling or signal conditioning arrangements specially adapted for A/D converters
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03M—CODING; DECODING; CODE CONVERSION IN GENERAL
    • H03M1/00—Analogue/digital conversion; Digital/analogue conversion
    • H03M1/66—Digital/analogue converters
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N1/00—Scanning, transmission or reproduction of documents or the like, e.g. facsimile transmission; Details thereof
    • H04N1/00912—Arrangements for controlling a still picture apparatus or components thereof not otherwise provided for
    • H04N1/00933—Timing control or synchronising
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N2201/00—Indexing scheme relating to scanning, transmission or reproduction of documents or the like, and to details thereof
    • H04N2201/0008—Connection or combination of a still picture apparatus with another apparatus
    • H04N2201/0065—Converting image data to a format usable by the connected apparatus or vice versa

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  • Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Facsimile Image Signal Circuits (AREA)
  • Color, Gradation (AREA)

Abstract

본 발명은 일정 화상 데이타를 읽어들여 프린터로 출력하는 화상 처리장치(예:레이저 프린터, 팩스, 복사기 등)에 관한 것으로서, 특히 Half-tone을 하드웨어적으로 구현하기 위해 입력되는 화상 데이타의 레벨을 반영하여 레이저 다이오드의전류량을 조절하여 줌으로써 화상 스캔(Scan)에 소요되는 시간을 줄일 수 있고, 또한 좀더 부드러운 화상을 출력시킬 수 있도록 한 화상 처리장치에 관한 것이다.BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an image processing apparatus (e.g., a laser printer, a fax machine, a copier, etc.) that reads constant image data and outputs the same to a printer. The present invention relates to an image processing apparatus which can reduce the time required for image scanning by adjusting the amount of current of a laser diode and can output a smoother image.

종래 화상 처리장치는 Dither 방식을 채택하기 때문에 기준값 설정을 위한 프로그램 설정이 어려우며 또한 기준값 설정 시간이 길이 때문에 화상의 입력에서 출력까지 소요시간이 길어지고, 1 pel 당 1비트로 프린트되기 때문에 화상 표현에 오차가 발생하며, 화상 데이타의 농도 조절시 기준값의 높낮이를 조절함으로서 데이타의 손실이 발생하는 문제점이 있다.Since the conventional image processing apparatus adopts the Dither method, it is difficult to set a program for setting the reference value, and because the reference setting time is long, the time required from input to output of the image is long, and the image is printed in 1 bit per 1 pel. There is a problem that the loss of data occurs by adjusting the height of the reference value when adjusting the density of the image data.

따라서, 본 발명은 상기 문제점을 해결하기 위해 입력되는 화상 데이타의 레벨을 반영하여 레이저 다이오드의 전류량을 조절하여 줌으로써 화상 스캔(Scan)에 소요되는 시간을 줄일 수 있고, 또한 좀더 부드러운 화상을 출력시킬 수 있도록 한 화상 처리장치이다.Accordingly, the present invention can reduce the time required for image scanning by adjusting the amount of current of the laser diode reflecting the level of the image data input to solve the above problems, and can also output a smoother image. One image processing apparatus.

Description

화상 처리장치Image processing device

본 내용은 요부공개 건이므로 전문내용을 수록하지 않았음Since this is an open matter, no full text was included.

제3도는 본 발명 화상 처리장치의 구성을 보인 회로 블럭도.3 is a circuit block diagram showing the configuration of the image processing apparatus of the present invention.

Claims (1)

문서 또는 화상 데이타를 읽어들이는 화상 입력부(11)와, 상기 화상 입력부(11)에서 읽어들인 화상 데이타에서 임의의 데이타를 샘플링하여 샘플링된 데이타 값을 고정하는 데이타 고정부(12)와, 상기 데이타 고정부(12)에서 고정된 화상 데이타를 디지탈 신호로 변환시키는 A/D 변환부(13)와, 상기 A/D 변환부(13)에서 출력된 디지탈 데이타를 프린트 동기신호에 동기시켜 페이지 단위로 저장하는 페이지 메모리(14)와, 디지탈 화상 데이타를 프린트 동기신호에 동기시켜 아날로그 신호로 변환시키는 D/A 변환부(15)와, 상기 D/A 변환부(15)에서 출력되는 아날로그 화상 데이타를 소정의 기준신호와 비교하여 그 차이만큼을 증폭하는 차동 증폭부(16)와, 레이저 다이오드를 이용하여 화상 데이타를 프린트 출력하는 화상 출력부(18)와, 상기 차동 증폭부(16)에서 출력되는 화상 데이타의 레벨값에 따라 화상 출력부(18)의 레이저 다이오드를 구동시키기 위한 전류량을 제어하는 전류 제어부(17)로 구성된 것을 특징으로 하는 화상 처리장치.An image input unit 11 for reading document or image data, a data fixing unit 12 for sampling arbitrary data from the image data read from the image input unit 11, and fixing the sampled data value, and the data An A / D converter 13 for converting image data fixed by the fixed unit 12 into a digital signal, and digital data output from the A / D converter 13 in synchronization with a print synchronization signal in units of pages. A page memory 14 to be stored, a D / A converter 15 for converting digital image data into an analog signal in synchronization with a print synchronization signal, and analog image data output from the D / A converter 15; A differential amplifier 16 for amplifying the difference by comparison with a predetermined reference signal, an image output unit 18 for printing and outputting image data using a laser diode, and an output from the differential amplifier 16 The image processing apparatus according to claim consisting of a current controller 17 for controlling the amount of current for driving the laser diode of the image output unit 18 in accordance with the level value of the image data. ※ 참고사항 : 최초출원 내용에 의하여 공개하는 것임.※ Note: The disclosure is based on the initial application.
KR1019950001269A 1995-01-25 1995-01-25 Image processing apparatus KR0147342B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1019950001269A KR0147342B1 (en) 1995-01-25 1995-01-25 Image processing apparatus

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1019950001269A KR0147342B1 (en) 1995-01-25 1995-01-25 Image processing apparatus

Publications (2)

Publication Number Publication Date
KR960030628A true KR960030628A (en) 1996-08-17
KR0147342B1 KR0147342B1 (en) 1998-09-15

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100790902B1 (en) * 2007-01-08 2008-01-03 삼성전자주식회사 Apparatus for driving of a laser diode using for image display

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