KR100390673B1 - Method for adjusting print density of laser beam printer - Google Patents

Method for adjusting print density of laser beam printer Download PDF

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Publication number
KR100390673B1
KR100390673B1 KR1019960001282A KR19960001282A KR100390673B1 KR 100390673 B1 KR100390673 B1 KR 100390673B1 KR 1019960001282 A KR1019960001282 A KR 1019960001282A KR 19960001282 A KR19960001282 A KR 19960001282A KR 100390673 B1 KR100390673 B1 KR 100390673B1
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print density
lbp
print
laser beam
cpu
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KR1019960001282A
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Korean (ko)
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KR970058937A (en
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노석필
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삼성전자주식회사
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Publication of KR970058937A publication Critical patent/KR970058937A/en
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    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/12—Digital output to print unit, e.g. line printer, chain printer
    • G06F3/1201—Dedicated interfaces to print systems
    • G06F3/1202—Dedicated interfaces to print systems specifically adapted to achieve a particular effect
    • G06F3/1203—Improving or facilitating administration, e.g. print management
    • G06F3/1208—Improving or facilitating administration, e.g. print management resulting in improved quality of the output result, e.g. print layout, colours, workflows, print preview
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
    • B41J2/00—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed
    • B41J2/435—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by selective application of radiation to a printing material or impression-transfer material
    • B41J2/447—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by selective application of radiation to a printing material or impression-transfer material using arrays of radiation sources
    • B41J2/455—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by selective application of radiation to a printing material or impression-transfer material using arrays of radiation sources using laser arrays, the laser array being smaller than the medium to be recorded
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/12—Digital output to print unit, e.g. line printer, chain printer
    • G06F3/1293—Printer information exchange with computer

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  • Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • Quality & Reliability (AREA)
  • Human Computer Interaction (AREA)
  • Physics & Mathematics (AREA)
  • General Engineering & Computer Science (AREA)
  • General Physics & Mathematics (AREA)
  • Laser Beam Printer (AREA)
  • Accessory Devices And Overall Control Thereof (AREA)

Abstract

PURPOSE: A print density adjusting method of a laser beam printer is provided to improve the print quality by controlling to the standard print density with printing the test pattern and detecting the print state through a photo sensor. CONSTITUTION: A laser beam printer is converted into a print density adjusting mode in applying power to the laser beam printer or pushing a print density adjusting mode converting switch(S1). A CPU(central processing unit) reads information on test pattern stored in a ROM, and transmits information to a laser beam printer driving unit to print the test pattern(S2). A photo sensor detects the printed test pattern, and transmits electric signals to the CPU(S3). The CPU compares the sensed value with the reference print density data stored in the ROM(S4), and outputs the control signal to adjust the laser beam printer driving unit for changing the print density(S5). Print condition is stored in the ROM by varying bias voltage(S6).

Description

레이져 빔 프린터의 인쇄 농도 조절방법How to adjust the print density of the laser beam printer

본 발명은 레이저 빔 프린터의 인쇄 농도 자동 조절방법에 관한 것으로서, 보다 상세하게는 용지에 일정한 테스트 패턴을 인쇄한 후, 이 상태를 포토센서로 감지하여, 인쇄 농도 기준 값으로 보상하기 위한 제어신호를 검출하므로써 향상된 인쇄 농도 품질을 기대할 수 잇는 레이저 빔 프린터의 인쇄 농도 조절방법에 관한 것이다.The present invention relates to a method for automatically adjusting the print density of a laser beam printer. More particularly, after printing a predetermined test pattern on a paper, the sensor detects this state with a photosensor, and compensates for a control signal to a print density reference value. The present invention relates to a method for adjusting the print density of a laser beam printer which can expect improved print density quality by detecting.

일반적으로 레이저 빔 프린터(LASER Beam Printer : 이하 LBP 라 칭함)의 인쇄 농도는 인쇄에 사용되는 용지의 상태나 주변 환경 등에 의해 그 품질이 결정된다.In general, the print density of a laser beam printer (hereinafter referred to as LBP) is determined by the quality of the paper used for printing or the surrounding environment.

이 때, LBP의 인쇄농도는 사용되는 용지의 상태에 무관하게 일정한 농도를 유지함에 따라 그 품질이 저하되는 경우가 자주 발생하는 문제점을 갖고 있다.At this time, the printing concentration of LBP has a problem that the quality often deteriorates as it maintains a constant density regardless of the state of the paper used.

위와 같은 문제점을 해결하기 위한 본 발명은 일정한 테스트 패턴을 인쇄하고 포토 센서로 감지한 후에, 이를 중앙처리장치( 이하 CPU 라 칭함)가 상응된 보상값을 LBP 구동부에 전달하여 인쇄 농도를 자동 조절하므로써, 인쇄 농도 품질을 향상 시킬 수 있는 LBP의 인쇄 농도 자동 조절장치 및 조절방법을 제공함을 목적으로 한다.In order to solve the above problems, the present invention prints a predetermined test pattern and detects it with a photo sensor, and then the central processing unit (hereinafter referred to as CPU) transfers a corresponding compensation value to the LBP driver to automatically adjust the print density. It is an object of the present invention to provide an automatic printing density control device and control method of LBP that can improve the printing density quality.

위와 같은 목적을 달성하기 위한 본 발명은, LBP의 인쇄농도를 조절하되, CPU의 제어신호가 LBP 구동부의 바이어스 전압을 조절하여 인쇄농도를 변화시키도록 하는 인쇄농도 자동조절방법에 있어서, LBP의 인쇄 농도 조절 모드로 전환하는 과정; LBP구동부의 동작에 다라, 용지에 일정한 테스트 패턴을 인쇄하는 과정; 상기 인쇄과정에 의해 인쇄된 상태를 포토 센서가 감지하여, CPU로 전기적 신호의 형태로 전달하는 과정; 상기 센싱된 결과를 전달받은 CPU가 롬에 저장된 기준 인쇄농도 데이타와 비교하는 과정; 상기 비교 과정에 따라 인쇄 농도를 변화시킬 수 있도록, 상기 CPU의 제어 신호가 상기 LBP 구동부를 조정하는 과정; 및 상기 변화된 LBP 구동부의 인쇄 조건을 내부 메모리에 저장하는 과정;을 더 포함하여 된 것이다.In order to achieve the above object, the present invention, while adjusting the print density of the LBP, in the automatic control method of the print density in which the control signal of the CPU to change the print density by adjusting the bias voltage of the LBP driver, the printing of the LBP Switching to the concentration control mode; Printing a predetermined test pattern on paper according to the operation of the LBP driver; A photo sensor detecting a state printed by the printing process and transferring the printed state in the form of an electrical signal to the CPU; Comparing, by the CPU, the received result with the reference print density data stored in the ROM; Adjusting the LBP driver by the control signal of the CPU to change the print density according to the comparison process; And storing printing conditions of the changed LBP driver in an internal memory.

이하 첨부된 도면을 참조로 하여, 본 발명의 구성 및 동작에 관하여 상세히 설명한다.Hereinafter, with reference to the accompanying drawings, the configuration and operation of the present invention will be described in detail.

제 1 도는 본 발명이 적용되는 LBP의 인쇄 농도 자동 조절장치의 구성을 나타내는 블록도이다.1 is a block diagram showing the configuration of an automatic printing density control apparatus for LBP to which the present invention is applied.

도시된 바와 같이 본 발명이 적용되는 LBP회로는, 컴퓨터로부터 인터페이스카드를 통해 전달된 인쇄 대상 데이터를 제공하고 보관하는 램(10)과, 인쇄될 문자폰트 데이터 및 프로그램이 저장된 롬(20)과, 상기 램(10) 및 롬(20)으로부터 전달된 데이터를 받아, 이에 따라 LBP의 전반적인 제어신호를 발생하는 CPU(30)와, 상기 CPU(30)로부터 전달되는 제어신호에 따라 LBP를 구동하는 LBP 구동부(40)와, 상기 LBP 구동부(40)의 동작에 따라 인쇄되는 테스트 패턴의 농도를 감지하여, 그 결과를 상기 CPU(30)로 전달하는 포토 센서(50)로 구성된다.As shown, the LBP circuit to which the present invention is applied includes: a RAM 10 for providing and storing print target data transmitted from a computer through an interface card, a ROM 20 for storing text font data and a program to be printed; Receiving data transmitted from the RAM 10 and the ROM 20, accordingly the CPU 30 generates the overall control signal of the LBP, and LBP driving the LBP in accordance with the control signal transmitted from the CPU 30 A driver 40 and a photo sensor 50 for detecting the density of a test pattern printed according to the operation of the LBP driver 40 and transmitting the result to the CPU 30.

위와 같이 구성된 본 발명의 동작은 제 2 도에 나타난 바와 같은 흐름도에 따라 진행된다.Operation of the present invention configured as described above proceeds according to the flowchart as shown in FIG.

초기에 LBP에 전원이 인가됨과 동시에 실행되거나, 혹은 사용자가 필요에 따라 LBP의 소정의 위치에 구비된 인쇄 농도 조절모드 전환 스위치를 누를 때 인쇄 농도 조절 모드로 전환하는 과정(S1)이 선행된다.Initially, the power is supplied to the LBP at the same time, or when the user presses the print density adjustment mode switching switch provided at a predetermined position of the LBP, a process (S1) of switching to the print density adjustment mode is preceded.

이에 따라 CPU(30)는 롬(20)에 저장된 테스트 패턴에 대한 정보를 읽어들이고, 이를 LBP 구동부(40)에 전달하여 테스트 패턴을 인쇄한다 (S2 과정).Accordingly, the CPU 30 reads information on the test pattern stored in the ROM 20 and transfers it to the LBP driver 40 to print the test pattern (S2 process).

여기서, 인쇄되는 테스트 패턴은 농도 조절용으로 약정된 임의의 인쇄 패턴이다.Here, the test pattern to be printed is any print pattern promised for density adjustment.

인쇄된 테스트 패턴을 포토 센서(50)가 광량으로 감지하여 이에 대한 정보를 상기 CPU로 일정하게 변화된 전기적 신호로 전달된다(S3 과정).The photo sensor 50 detects the printed test pattern as the amount of light and transmits the information about the printed test pattern to the CPU as a constant electric signal (S3).

상기 비교 과정(S4)에 따라 인쇄 농도를 변화시킬 수 있도록, 상기 CPU(30)에서 제어신호를 출력하고, 이에 따라 상기 LBP 구동부(40)의 인쇄 조건이 조정된다(S5 과정)은 바이어스 전압을 가변시켜 인쇄 농도를 조절할 수도 있고, LBP에 연관된 임의의 전압을 가변시켜 조절할 수도 있다.The CPU 30 outputs a control signal to change the print density according to the comparison process S4, and accordingly the printing condition of the LBP driver 40 is adjusted (step S5). The print density may be adjusted to vary, or any voltage associated with LBP may be adjusted to vary.

상기 인쇄조건 조정(S5 과정)에 의해 변화된 인쇄 조건은 램(10)에 저장되고 (S6 과정), LBP는 정상 모드로 전환된다.The printing condition changed by the printing condition adjustment (step S5) is stored in the RAM 10 (step S6), and the LBP is switched to the normal mode.

이상에서 살펴본 바와 같이 본 발명은 테스트 패턴을 인쇄하고, 그 인쇄 상태를 포토 센서를 통하여 감지하여 기준 인쇄 농도에 가깝게 제어하므로써 인쇄 농도의 품질을 향상시킬 수 있는 효과를 가진다.As described above, the present invention has the effect of improving the quality of the print density by printing a test pattern and sensing the print state through a photo sensor to control the reference print density.

제1도는 본 발명이 적용되는 레이져 빔 프린터의 회로 블럭도이다.1 is a circuit block diagram of a laser beam printer to which the present invention is applied.

제2도는 본 발명에 따른 레이저 빔 프린터의 인쇄 농도 자동 조절방법을 나타내는 흐름도이다.2 is a flowchart showing a method for automatically adjusting the print density of a laser beam printer according to the present invention.

Claims (1)

LBP의 인쇄농도를 조절하되, CPU의 제어신호가 LBP 구동부의 바이어스 전압을 조절하여 인쇄농도를 변화시키도록 하는 인쇄농도 자동조절방법에 있어서,In the printing density automatic control method of adjusting the print density of the LBP, but the control signal of the CPU to change the print density by adjusting the bias voltage of the LBP drive unit, LBP의 인쇄 농도 조절 모드로 전환하는 과정과,Switching to LBP's print density control mode, LBP구동부의 동작에 따라 용지에 일정한 테스트 패턴을 인쇄하는 과정과,Printing a certain test pattern on the paper according to the operation of the LBP driver; 상기 인쇄과정에 의해 인쇄된 상태를 포트 센서가 감지하여, CPU로 전기적 신호의 형태로 전달하는 과정과,Detecting a state printed by the printing process by the port sensor and transferring the electrical signal to the CPU in the form of an electrical signal; 상기 센싱된 결과를 전달받은 CPU가 롬에 저장된 기준 인쇄농도 데이타와 비교하는 과정과,Comparing the detected result with the CPU by comparing the reference print density data stored in the ROM; 상기 비교 과정에 따라 인쇄 농도를 변화시킬 수있도록, 상기 CPU의 제어 신호가 상기 LBP 구동부를 조정하는 과정과,Adjusting the LBP driver by the control signal of the CPU to change the print density according to the comparison process; 상기 변화된 LBP 구동부의 인쇄 조건을 내부 메모리에 저장하는 과정을 더 포함하여 된 것을 특징으로 하는 LBP의 인쇄 농도 자동 조절 방법Method for automatically adjusting the print density of the LBP characterized in that it further comprises the step of storing the printing conditions of the changed LBP driver in the internal memory
KR1019960001282A 1996-01-22 1996-01-22 Method for adjusting print density of laser beam printer KR100390673B1 (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2012118480A1 (en) * 2011-02-28 2012-09-07 Hewlett-Packard Development Company, L.P. Printing

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN100378600C (en) 2003-11-11 2008-04-02 三星电子株式会社 Control method of image forming apparatus

Citations (3)

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Publication number Priority date Publication date Assignee Title
JPS55106470A (en) * 1979-02-09 1980-08-15 Hitachi Ltd Printing density control unit
JPH0297971A (en) * 1988-10-05 1990-04-10 Ricoh Co Ltd Image forming device
KR930012321A (en) * 1991-12-27 1993-07-20 이헌조 Print density control method and circuit of laser printer

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS55106470A (en) * 1979-02-09 1980-08-15 Hitachi Ltd Printing density control unit
JPH0297971A (en) * 1988-10-05 1990-04-10 Ricoh Co Ltd Image forming device
KR930012321A (en) * 1991-12-27 1993-07-20 이헌조 Print density control method and circuit of laser printer

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2012118480A1 (en) * 2011-02-28 2012-09-07 Hewlett-Packard Development Company, L.P. Printing
CN103380005A (en) * 2011-02-28 2013-10-30 惠普发展公司，有限责任合伙企业 Printing
US9020371B2 (en) 2011-02-28 2015-04-28 Hewlett-Packard Development Company, L.P. Printing
CN103380005B (en) * 2011-02-28 2016-01-06 惠普发展公司，有限责任合伙企业 For adjusting method and apparatus and the print system of the calibration algorithm of color calibration

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