KR900000796A - Light emission control circuit of LED print head - Google Patents

Light emission control circuit of LED print head

Info

Publication number
KR900000796A
KR900000796A KR1019880007084A KR880007084A KR900000796A KR 900000796 A KR900000796 A KR 900000796A KR 1019880007084 A KR1019880007084 A KR 1019880007084A KR 880007084 A KR880007084 A KR 880007084A KR 900000796 A KR900000796 A KR 900000796A
Authority
KR
South Korea
Prior art keywords
led
duty ratio
light emission
emission
timing signal
Prior art date
Application number
KR1019880007084A
Other languages
Korean (ko)
Other versions
KR910001315B1 (en
Inventor
오영남
Original Assignee
강진구
삼성반도체통신 주식회사
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.)
Filing date
Publication date
Application filed by 강진구, 삼성반도체통신 주식회사 filed Critical 강진구
Priority to KR1019880007084A priority Critical patent/KR910001315B1/en
Publication of KR900000796A publication Critical patent/KR900000796A/en
Application granted granted Critical
Publication of KR910001315B1 publication Critical patent/KR910001315B1/en

Links

Classifications

    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06V—IMAGE OR VIDEO RECOGNITION OR UNDERSTANDING
    • G06V10/00—Arrangements for image or video recognition or understanding
    • G06V10/88—Image or video recognition using optical means, e.g. reference filters, holographic masks, frequency domain filters or spatial domain filters
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
    • G06K15/00—Arrangements for producing a permanent visual presentation of the output data, e.g. computer output printers
    • G06K15/02—Arrangements for producing a permanent visual presentation of the output data, e.g. computer output printers using printers
    • G06K15/12—Arrangements for producing a permanent visual presentation of the output data, e.g. computer output printers using printers by photographic printing, e.g. by laser printers

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Theoretical Computer Science (AREA)
  • Multimedia (AREA)
  • Optics & Photonics (AREA)
  • General Engineering & Computer Science (AREA)
  • Printers Or Recording Devices Using Electromagnetic And Radiation Means (AREA)

Abstract

내용 없음.No content.

Description

LED 프린터 헤드의 발광 조정회로Light emission control circuit of LED print head

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

제1도는 직접 구동방식의 LED어레이 회로도.1 is a circuit diagram of a direct drive LED array.

제2도는 제1도의 동작 타이밍도.2 is an operation timing diagram of FIG.

제3도는 광량 보정롬을 사용한 LED헤드 구성도.3 is a configuration diagram of the LED head using the light intensity correction ROM.

Claims (2)

프린트 데이타를 시스탬 클럭에 의해 직렬 저장하며, 저장완료시 병렬래치하여 소정의 LED어레이 칩을구동하는 직렬구동 방식의 LED프린터 헤드장치에 있어서, 시스템 클럭을 소정분주하여 제1및 제 2클럭을 발생하는 카운트 수단과, 상기 카운트 수단의 출력을 논리조합하여 일정주기를 갖는 다수상태의 LED 발광타이밍 신호를 생성하며 상기 LED어레이 칩의 발광특성에 따른 광량오차를 보정할 수 있는 LED 발광 타이밍신호를 선택하는 발광타이밍신호 생성수단으로 구성함을 특징으로 하는 LED 발생시간 조정장치.In the serial drive type LED printer head device which stores the print data serially by the system clock and parallelly latches the drive to drive a predetermined LED array chip, the system clock is divided by a predetermined amount to generate the first and second clocks. Selects an LED emission timing signal capable of generating a multi-state LED emission timing signal having a predetermined period by logically combining a count means and an output of the count means, and correcting a light quantity error according to emission characteristics of the LED array chip. LED generating time adjusting device, characterized in that consisting of a light emitting timing signal generating means. 제1항에 있어서, 발광 타이밍신호 생성수단이, 상기 제1및 제2클럭을 부논리곱하여,"하이"듀티비가75%인 제 3발광신호를 발생하는 낸드게이트 (302)와, 상기 낸드게이트(302)의 출력을 반전하여 "하이"듀티비가 25%인 제 1발광신호를 발생하는 인버터(303)와, 상기 제1클럭을 반전하여 "하이"듀티비가 50%인 제2발광신호를 발생하는 인버터(304)와, 상기 제 1클럭과 인버터 (304)의 출력을 부논리곱하여 "하이"듀티비가 100%인 제 4발광신호를 발생하는 낸드게이트(305)로 구성함을 특징으로 하는 회로.The NAND gate 302 according to claim 1, wherein the light emission timing signal generating means negatively multiplies the first and second clocks to generate a third light emission signal having a "high" duty ratio of 75%. An inverter 303 that inverts the output of 302 to generate a first emission signal having a "high" duty ratio of 25%, and generates a second emission signal that has a "high" duty ratio of 50% by inverting the first clock. And a NAND gate 305 which generates a fourth light emission signal having a "high" duty ratio of 100% by negatively multiplying the inverter 304 and the output of the first clock and the inverter 304. . ※ 참고사항 : 최초출원 내용에 의하여 공개하는 것임.※ Note: The disclosure is based on the initial application.
KR1019880007084A 1988-06-13 1988-06-13 Circuit for controlling light emitting of led printer head KR910001315B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1019880007084A KR910001315B1 (en) 1988-06-13 1988-06-13 Circuit for controlling light emitting of led printer head

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1019880007084A KR910001315B1 (en) 1988-06-13 1988-06-13 Circuit for controlling light emitting of led printer head

Publications (2)

Publication Number Publication Date
KR900000796A true KR900000796A (en) 1990-01-31
KR910001315B1 KR910001315B1 (en) 1991-03-02

Family

ID=19275157

Family Applications (1)

Application Number Title Priority Date Filing Date
KR1019880007084A KR910001315B1 (en) 1988-06-13 1988-06-13 Circuit for controlling light emitting of led printer head

Country Status (1)

Country Link
KR (1) KR910001315B1 (en)

Also Published As

Publication number Publication date
KR910001315B1 (en) 1991-03-02

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