KR970056769A - Reading circuit of image scanner and its method - Google Patents
Reading circuit of image scanner and its method Download PDFInfo
- Publication number
- KR970056769A KR970056769A KR1019950047105A KR19950047105A KR970056769A KR 970056769 A KR970056769 A KR 970056769A KR 1019950047105 A KR1019950047105 A KR 1019950047105A KR 19950047105 A KR19950047105 A KR 19950047105A KR 970056769 A KR970056769 A KR 970056769A
- Authority
- KR
- South Korea
- Prior art keywords
- dummy
- signal
- generating
- position register
- post
- Prior art date
Links
Classifications
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- 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
- H04N1/024—Details of scanning heads ; Means for illuminating the original
- H04N1/028—Details of scanning heads ; Means for illuminating the original for picture information pick-up
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03K—PULSE TECHNIQUE
- H03K21/00—Details of pulse counters or frequency dividers
- H03K21/38—Starting, stopping or resetting the counter
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- 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
- H04N1/00795—Reading arrangements
- H04N1/00798—Circuits or arrangements for the control thereof, e.g. using a programmed control device or according to a measured quantity
Landscapes
- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
- Facsimile Scanning Arrangements (AREA)
Abstract
1. 청구범위에 기재된 발명이 속한 기술분야1. TECHNICAL FIELD OF THE INVENTION
이미지 스캐너를 이용하여 원고를 독취하는 장치에 관한 것이다.The present invention relates to an apparatus for reading an original using an image scanner.
2. 발명이 해결하려고 하는 기술적 과제2. The technical problem to be solved by the invention
이미지 스캐너를 이용하여 원고독취시 얻어진 더미데이터와 유효데이터의 전송구동클럭을 각각 달리 제어함으로써, 원고의 앞뒤 라인의 겹쳐짐을 방지하고 고속영상처리시스템을 구축한다.By controlling the transmission driving clocks of the dummy data and the valid data obtained when the document is read by the image scanner, the overlapping of the front and back lines of the document is prevented and a high speed image processing system is constructed.
3. 발명의 해결방법의 요지3. Summary of Solution to Invention
시스템클럭을 발생하는 시스템클럭 발생수단과; 상기 시스템클럭에 동기되어 카운팅클럭신호를 발생하는 카운팅수단과; 상기 더미데이터의 뒷 영역을 저장하는 포스트더미 위치레지스터를 두며, 상기 카운팅클럭신호와 상기 포스트더미 위치레지스터의 출력값을 비교하여 상기 포스트더미 위치레지스터의 출력값이 더 크면 포스트더미신호를 발생하는 수단과; 상기 더미데이터의 앞영역을 저장하는 프리더미 위치레지스터를 두며, 상기 카운팅클럭신호와 상기 프리더미 위치레지스터의 출력값을 비교하여 상기 프리더미 위치레지스터의 출력값이 더 크면 프리더미신호를 발생하는 수단과; 상기 유효데이터 구간을 구별하기 위해 상기 프리더미 위치레지스터와 포스트더미 위치레지스터를 두며, 상기 카운팅클럭신호가 상기 프리더미 위치레지스터의 출력값보다 크고 상기 포스트더미 위치레지스터의 출력값보다 작으면 유효신호를 발생하는 수단과; 상기 한 라인의 마지막을 검출하기 위해 라인종단 레지스터를 두며, 상기 카운팅클럭신호와 상기 라인종단 레지스터의 출력값을 비교하여 같으면 상기 카운팅수단을 클리어시키는 클리어신호를 발생하는 수단과; 상기 시스템클럭에 동기되어 더미주파수와 유효주파수를 발생하고, 상기 프리더미신호 및 상기 포스트더미신호에 셀렉트되어 상기 더미주파수를 출력하고 상기 유효신호에 셀렉트되어 상기 유효주파수를 출력하는 수단으로 해결한다.System clock generating means for generating a system clock; Counting means for generating a counting clock signal in synchronization with the system clock; A post-dummy position register for storing a rear region of the dummy data, and means for generating a post-dummy signal when the output value of the post-dummy position register is larger by comparing the counting clock signal with the output value of the post-dummy position register; Means for generating a predummy position register for storing a front region of the dummy data, and comparing the counting clock signal with the output value of the predummy position register to generate a free dummy signal if the output value of the predummy position register is larger; The pre-dummy position register and the post-dummy position register are provided to distinguish the valid data section. When the counting clock signal is greater than the output value of the pre-dummy position register and smaller than the output value of the post-dummy position register, a valid signal is generated. Means; Means for placing a line termination register to detect the end of said one line, and comparing said counting clock signal with the output value of said line termination register and generating a clear signal for clearing said counting means; A means for generating a dummy frequency and an effective frequency in synchronization with the system clock, selecting the free dummy signal and the post dummy signal to output the dummy frequency, and selecting the valid signal to output the effective frequency.
4. 발명의 중요한 용도4. Important uses of the invention
원고의 고속독취에 이용된다.Used for fast reading of the manuscript.
Description
본 내용은 요부공개 건이므로 전문내용을 수록하지 않았음Since this is an open matter, no full text was included.
제3도는 본 발명에 따른 CCD 이미지 스캐너중 전송부를 나타내는 구성도.3 is a block diagram showing a transmission unit of the CCD image scanner according to the present invention.
제4도는 본 발명에 따른 독취회로의 구성도.4 is a block diagram of a read circuit according to the present invention.
제5도는 본 발명에 따른 CCD 이미지 스캐너에서 스캐닝 동작을 나타내는 도면.5 illustrates a scanning operation in a CCD image scanner according to the present invention.
Claims (4)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
KR1019950047105A KR0164831B1 (en) | 1995-12-06 | 1995-12-06 | Method and circuit for reading image scanner |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
KR1019950047105A KR0164831B1 (en) | 1995-12-06 | 1995-12-06 | Method and circuit for reading image scanner |
Publications (2)
Publication Number | Publication Date |
---|---|
KR970056769A true KR970056769A (en) | 1997-07-31 |
KR0164831B1 KR0164831B1 (en) | 1999-03-20 |
Family
ID=19438075
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
KR1019950047105A KR0164831B1 (en) | 1995-12-06 | 1995-12-06 | Method and circuit for reading image scanner |
Country Status (1)
Country | Link |
---|---|
KR (1) | KR0164831B1 (en) |
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1995
- 1995-12-06 KR KR1019950047105A patent/KR0164831B1/en not_active IP Right Cessation
Also Published As
Publication number | Publication date |
---|---|
KR0164831B1 (en) | 1999-03-20 |
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