KR20010027526A - Laser printer - Google Patents

Laser printer Download PDF

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Publication number
KR20010027526A
KR20010027526A KR1019990039315A KR19990039315A KR20010027526A KR 20010027526 A KR20010027526 A KR 20010027526A KR 1019990039315 A KR1019990039315 A KR 1019990039315A KR 19990039315 A KR19990039315 A KR 19990039315A KR 20010027526 A KR20010027526 A KR 20010027526A
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KR
South Korea
Prior art keywords
laser diode
photosensitive drum
laser
lens
diode module
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Application number
KR1019990039315A
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Korean (ko)
Inventor
송인택
Original Assignee
이형도
삼성전기 주식회사
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Priority to KR1019990039315A priority Critical patent/KR20010027526A/en
Publication of KR20010027526A publication Critical patent/KR20010027526A/en

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Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B41PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41JTYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
    • B41J2/00Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed
    • B41J2/435Typewriters 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
    • B41J2/44Typewriters 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 single radiation source per colour, e.g. lighting beams or shutter arrangements
    • B41J2/442Typewriters 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 single radiation source per colour, e.g. lighting beams or shutter arrangements using lasers
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B41PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41JTYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
    • B41J11/00Devices or arrangements  of selective printing mechanisms, e.g. ink-jet printers or thermal printers, for supporting or handling copy material in sheet or web form
    • B41J11/0095Detecting means for copy material, e.g. for detecting or sensing presence of copy material or its leading or trailing end
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B41PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41JTYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
    • B41J2/00Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed
    • B41J2/005Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by bringing liquid or particles selectively into contact with a printing material
    • B41J2/01Ink jet
    • B41J2/135Nozzles
    • B41J2/14Structure thereof only for on-demand ink jet heads
    • B41J2/14016Structure of bubble jet print heads
    • B41J2/14153Structures including a sensor
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B41PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41JTYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
    • B41J2/00Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed
    • B41J2/435Typewriters 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
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B41PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41JTYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
    • B41J2/00Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed
    • B41J2/435Typewriters 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
    • B41J2/447Typewriters 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
    • B41J2/45Typewriters 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 light-emitting diode [LED] or laser arrays

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  • Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Health & Medical Sciences (AREA)
  • General Health & Medical Sciences (AREA)
  • Toxicology (AREA)
  • Mechanical Optical Scanning Systems (AREA)
  • Laser Beam Printer (AREA)

Abstract

PURPOSE: A laser printer is provided to simplify structure of a laser diode module by placing a sensor in the outside of the laser diode module, and to cut down a cost and improve working efficiency by reducing components. CONSTITUTION: A laser printer is composed of a laser diode module(20); a chassis(30) covering a housing(10); a photosensitive drum(40) spotting a beam from a scanning lens(26) in the chassis; a case(41) covering the photosensitive drum and having a long groove among the photosensitive drum for laser beam incidence; and a sensor(50) out of the laser diode module detecting the initial incidence position of the laser beam from the scanning lens. The laser diode module comprises the housing, a laser diode(21) in the housing, a collimator lens(22) forming the beam from the laser diode, a slit(23), and the scanning lens. The initial beam incidence position is detected promptly and precisely by installing the sensor in the case covering the photosensitive drum without an additional reflective mirror.

Description

레이저 프린터{Laser printer}Laser printer

본 발명은 레이저 프린터에 관한 것으로서, 보다 상세하게는 감광드럼으로 입사되는 빔의 초기 입사위치를 감지하는 센서의 설치 위치를 개선한 레이저 프린터에 관한 것이다.The present invention relates to a laser printer, and more particularly, to a laser printer having an improved installation position of a sensor for detecting an initial incident position of a beam incident on a photosensitive drum.

일반적으로 레이저 프린터는, 도 1 및 도 2에 나타내 보인 바와 같이, 대략 직사각형의 하우징(1)을 구비하며, 이 하우징(1)의 내부에는 발광부 즉, 광원인 레이저 다이오드 모듈(2)이 위치된다.Generally, a laser printer has a substantially rectangular housing 1, as shown in Figs. 1 and 2, in which a laser diode module 2, which is a light emitting part, that is, a light source, is located. do.

이 레이저 다이오드 모듈(2)은 레이저 빔을 발생시키는 레이저 다이오드(3)와, 이 레이저 다이오드(3)로부터 주사된 빔을 평행광으로 정형시키는 콜리메이터 렌즈(4) 그리고 정형된 평행광의 일부만을 통과시키기 위한 장방형 구멍(5a)이 형성된 슬릿(slit;5)으로 이루어진다.The laser diode module 2 passes only a laser diode 3 for generating a laser beam, a collimator lens 4 for shaping the beam scanned from the laser diode 3 into parallel light, and a part of the shaped parallel light. It consists of a slit 5 in which a rectangular hole 5a is formed.

그리고 슬릿(5)을 통과한 빔의 경로상에는 주사된 빔을 부주사방향으로 수렴하기 위한 실린드리컬 렌즈(6)와, 고속으로 회전되면서 실린드리컬 렌즈(6)를 통과한 빔을 일정의 화각으로 반사 시키기 위한 다수의 반사면을 갖는 폴리건 미러(7)가 위치된다.On the path of the beam passing through the slit 5, the cylindrical lens 6 for converging the scanned beam in the sub-scanning direction, and the beam passing through the cylindrical lens 6 while rotating at high speed A polygon mirror 7 is located having a plurality of reflecting surfaces for reflecting at an angle of view.

또한 폴리건 미러(7)의 전방에는 감광드럼(9)상에 빔을 스폿(spot)하기 위한 것으로서, 토릭렌즈(8a)와 비구면렌즈인 포커싱렌즈(8b)로 이루어진 f-θ렌즈 즉, 주사렌즈(8)가 위치된다.In addition, the front of the polygon mirror (7) to spot the beam on the photosensitive drum (9), the f-θ lens consisting of a toric lens (8a) and a focusing lens (8b) aspherical lens, that is, a scanning lens (8) is located.

레이저 다이오드 모듈(2)이 내장된 하우징(1)은 새시(10)에 안착되게 되며, 새시(10)에는 전술한 감광드럼(9) 및 이 감광드럼(9)을 감싸고 있는 케이스(11)가 함께 설치된다.The housing 1 in which the laser diode module 2 is embedded is mounted on the chassis 10, and the chassis 10 includes the above-described photosensitive drum 9 and a case 11 surrounding the photosensitive drum 9. It is installed together.

전술한 주사렌즈(8)와 인접된 하우징(1)상에는 감광드럼(9)상에 입사되는 레이저 빔의 초기 입사 위치를 감지하기 위한 것으로서, 감지센서(S)가 위치되며, 레이저 다이오드(3)로부터 주사된 빔을 감지센서(S)로 반사시키기 위한 것으로서 반사미러(M)가 감지센서(S)와 대향되는 곳에 위치된다.The sensing sensor S is positioned on the housing 1 adjacent to the scanning lens 8 to detect the initial incident position of the laser beam incident on the photosensitive drum 9, and the laser diode 3 is positioned. The reflection mirror (M) is located in a position opposite to the detection sensor (S) as to reflect the beam scanned from the detection sensor (S).

이와같은 구성을 갖는 광 주사장치의 작동 상태를 설명하면 다음과 같다.Referring to the operation of the optical scanning device having such a configuration as follows.

레이저 모듈을 구성하고 있는 레이저 다이오드(3)로부터 빔이 주사되면, 이 빔은 콜리메이터렌즈(4)를 거치면서 수평의 주주사(main scanning direction)와 수직의 부주사(sub scanning direction)가 평행한 평행빔으로 정형된 다음 슬릿(5)의 장방형 구멍(5a)과 실린드리컬 렌즈(6)를 통과하면서 부주사방향으로 수렴된다.When the beam is scanned from the laser diode 3 constituting the laser module, the beam passes through the collimator lens 4 in parallel with the horizontal main scanning direction and the vertical sub scanning direction in parallel. It is shaped into a beam and then converges in the sub-scanning direction while passing through the rectangular hole 5a of the slit 5 and the cylindrical lens 6.

이와같이 부주사방향으로 수렴된 빔은 고속으로 회전하고 있는 폴리건 미러(7)에서 일정의 화각을 갖는 상태로 반사되고, 토릭렌즈(8a)와 포커싱렌즈(8b)로 이루어진 주사렌즈(8)에 의해 주주사방향으로 수렴된 상태로 감광드럼(9)상에 초점이 맺혀 원하는 화상(畵像)을 얻게된다.The beam converged in the sub-scanning direction is reflected by the polygon mirror 7, which is rotating at high speed, at a constant angle of view, and is scanned by the scanning lens 8 composed of the toric lens 8a and the focusing lens 8b. Focusing on the photosensitive drum 9 in a state converged in the main scanning direction, a desired image is obtained.

한편, 주사렌즈(8)를 통과한 레이저 빔은 바로 감광드럼(9)상에 초점이 맺히는 것이 아니라, 복수의 반사미러(10)를 통해 반사되어 새시(10)상에 위치되고 케이스(11)에 의해 감싸여진 감광드럼(9)상에 초점이 맺히게된다.On the other hand, the laser beam passing through the scanning lens 8 is not directly focused on the photosensitive drum 9, but is reflected through the plurality of reflecting mirrors 10 and positioned on the chassis 10 and the case 11. The focus is made on the photosensitive drum 9 which is wrapped by.

또한 감지센서(S)와 반사미러(M)를 통해 레이저 다이오드(3)로부터 주사되는 빔의 초기 입사위치를 감지하여 적절한 제어를 행하게된다.In addition, through the detection sensor (S) and the reflection mirror (M) to detect the initial incident position of the beam scanned from the laser diode (3) to perform the appropriate control.

그러나 이와같은 종래 레이저 프린터에 있어서는, 레이저 다이오드(3)로부터 주사되는 빔의 초기 입사위치를 감지하기 위한 감지센서(S)가 레이저 다이오드 모듈(2)내에 위치됨으로서 레이저 다이오드 모듈(2)의 구조가 복잡해지는 문제점이 야기되며, 특히 감지센서(S)를 향해 레이저 빔을 반사시키기 위한 별도의 반사미러(M)를 구비하여야 함으로써 부품수 증가에 따른 단가상승과 조립 작업성의 저하를 초래하는등 많은 문제점을 내재하고 있다.However, in such a conventional laser printer, the detection sensor (S) for detecting the initial incident position of the beam scanned from the laser diode (3) is located in the laser diode module (2), the structure of the laser diode module (2) The problem is complicated, and in particular, a separate reflection mirror (M) for reflecting the laser beam toward the detection sensor (S) has to be provided. Is inherent.

본 발명은 이와같은 종래의 제반 문제점을 해결하기 위하여 창출된 것으로서, 감지센서를 레이저 다이오드 모듈 외측에 위치시킴으로써 레이저 다이오드 모듈의 구조 단순화 및 부품수 감소에 따른 단가절감과 작업성의 향상을 꾀할 수 있는 레이저 프린터를 제공함에 그 목적이 있다.The present invention was created in order to solve the above-mentioned conventional problems, and by placing the sensing sensor outside the laser diode module, the laser which can reduce the cost and workability due to the simplification of the structure of the laser diode module and the reduction of the number of parts The purpose is to provide a printer.

도 1 및 도 2는 일반적인 레이저 프린터를 나타낸 평면도 및 개념적 구성도,1 and 2 are a plan view and a conceptual configuration diagram showing a general laser printer,

도 3 및 도 4는 본 발명에 따른 레이저 프린터의 평면도 및 개념적 구성도.3 and 4 are a plan view and a conceptual configuration diagram of a laser printer according to the present invention.

<도면의 주요부분에 대한 부호의 설명><Description of the code | symbol about the principal part of drawing>

10 : 하우징 20 : 레이저 다이오드 모듈10 housing 20 laser diode module

21 : 레이저 다이오드 22 : 콜리메이터 렌즈21 laser diode 22 collimator lens

23 : 슬릿 24 : 실린드리컬 렌즈23: Slit 24: Cylindrical Lens

25 : 폴리건 미러 26 : 주사렌즈25 polygon mirror 26 scanning lens

30 : 새시 40 : 감광드럼30: chassis 40: photosensitive drum

41 : 케이스 50 : 센서41: case 50: sensor

이와같은 목적을 달성하기 위하여 본 발명에 따른 레이저 프린터는, 하우징과, 이 하우징의 내부에 위치되며, 광원인 레이저 다이오드와, 이 레이저 다이오드로부터 주사되는 빔을 정형시키는 콜리메이터 렌즈와 슬릿 및 그리고 주사렌즈로 이루어진 레이저 다이오드 모듈과; 상기 하우징을 외측에서 감싸는 새시와; 상기 레이저 다이오드와 인접된 새시상에 위치되며, 상기 주사렌즈로부터 주사된 빔이 스폿되는 감광드럼과; 상기 감광드럼의 외측면을 감싸며, 전면에는 레이저 빔이 입사되도록 감광드럼의 길이 방향을 따라 소정폭으로 장홈이 형성된 케이스와; 상기 레이저 다이오드 모듈의 외측에 설치되며, 상기 주사렌즈로부터 입사되는 레이저 빔의 초기 입사위치를 감지하는 센서;를 포함하여 된 것을 그 특징으로 한다.In order to achieve the above object, a laser printer according to the present invention comprises a housing, a laser diode positioned inside the housing, a collimator lens and a slit for shaping a beam scanned from the laser diode, and a scanning lens. A laser diode module consisting of; A chassis surrounding the housing from the outside; A photosensitive drum positioned on a chassis adjacent to the laser diode, the photosensitive drum spotted by a beam scanned from the scanning lens; A case surrounding an outer surface of the photosensitive drum and having a long groove formed at a predetermined width along a length direction of the photosensitive drum so that a laser beam is incident on a front surface thereof; It is installed on the outside of the laser diode module, the sensor for detecting the initial incident position of the laser beam incident from the scanning lens; characterized in that it comprises a.

본 발명의 바람직한 한 특징은, 상기 센서는, 상기 감광드럼을 감싸고 있는 케이스의 일단부에 설치되는 것에 있다.One preferred feature of the present invention is that the sensor is provided at one end of the case surrounding the photosensitive drum.

이하 본 발명에 따른 레이저 프린터의 바람직한 실시예를 첨부된 도면을 참조하여 상세히 설명한다.Hereinafter, a preferred embodiment of a laser printer according to the present invention will be described in detail with reference to the accompanying drawings.

도 3은 본 발명에 따른 레이저 프린터의 평면도이고, 도 4는 개념적으로 나타낸 구성도이다.3 is a plan view of a laser printer according to the present invention, and FIG. 4 is a block diagram conceptually shown.

이에 나타내 보인 바와 같이 본 발명에 따른 레이저 프린터는, 대략 직사각형의 하우징(10)을 구비하며, 이 하우징(10)의 내부에는 발광부 즉, 광원인 레이저 다이오드 모듈(20)이 위치된다.As shown therein, the laser printer according to the present invention includes a substantially rectangular housing 10, and inside the housing 10, a laser diode module 20, which is a light emitting part, that is, a light source, is located.

이 레이저 다이오드 모듈(20)은 레이저 빔을 발생시키는 레이저 다이오드(21)와, 이 레이저 다이오드(21)로부터 주사된 빔을 평행광으로 정형시키는 콜리메이터 렌즈(22) 그리고 정형된 평행광의 일부만을 통과시키기 위한 장방형 구멍(23a)이 형성된 슬릿(slit;23)으로 이루어진다.The laser diode module 20 passes only a laser diode 21 for generating a laser beam, a collimator lens 22 for shaping the beam scanned from the laser diode 21 into parallel light, and a part of the shaped parallel light. It consists of a slit 23 formed with a rectangular hole 23a.

그리고 슬릿(23)을 통과한 빔의 경로상에는 주사된 빔을 부주사방향으로 수렴하기 위한 실린드리컬 렌즈(24)와, 고속으로 회전되면서 실린드리컬 렌즈(24)를 통과한 빔을 일정의 화각으로 반사 시키기 위한 다수의 반사면을 갖는 폴리건 미러(25)가 위치된다.On the path of the beam passing through the slit 23, the cylindrical lens 24 for converging the scanned beam in the sub-scanning direction, and the beam passing through the cylindrical lens 24 while rotating at high speed A polygon mirror 25 having a plurality of reflecting surfaces for reflecting at an angle of view is located.

폴리건 미러(25)의 전방에는 새시(30)상에 위치되는 감광드럼(40)을 향해 빔을 스폿(spot)하기 위한 것으로서, 토릭렌즈(26a)와 비구면 렌즈인 포커싱 렌즈(26b)로 이루어진 f-θ렌즈 즉, 주사렌즈(26)가 위치된다.The front of the polygon mirror 25 to spot the beam toward the photosensitive drum 40 located on the chassis 30, consisting of a toric lens 26a and a focusing lens 26b as an aspheric lens. The -θ lens, that is, the scanning lens 26 is located.

이러한 레이저 다이오드 모듈(20)이 내장된 하우징(10)은 새시(30)에 안착되게 된다.The housing 10 in which the laser diode module 20 is embedded is mounted on the chassis 30.

한편, 새시(30)상에는 전술한 레이저 다이오드(21)로부터 주사된 빔이 주사렌즈(26)에 의해 감광드럼(40)에 스폿될 때 초기 입사 위치를 감지하기 위한 센서(50)가 위치된다.Meanwhile, on the chassis 30, a sensor 50 for detecting an initial incident position is positioned when the beam scanned from the laser diode 21 is spotted on the photosensitive drum 40 by the scanning lens 26.

이러한 센서(50)는 도 3에 나타내 보인 바와 같이 감광드럼(40)을 감싸고 있는 케이스(41)의 일측 외단부에 설치된다.As shown in FIG. 3, the sensor 50 is installed at one outer end of the case 41 surrounding the photosensitive drum 40.

즉, 센서(50)상으로 레이저 다이오드(21)로부터 주사된 빔이 직접 입사되게 되고, 이를 센싱함으로써 빔이 감광드럼(40)상으로 입사되는 초기 위치를 감지함으로써 적절한 입사위치를 조정할 수 있게되는 것이다.That is, the beam scanned from the laser diode 21 is directly incident on the sensor 50, and by sensing the initial position, the beam is incident on the photosensitive drum 40 so that an appropriate incident position can be adjusted. will be.

이러한 구성을 갖는 본 발명에 따른 레이저 프린터는, 레이저 다이오드 모듈(20)을 구성하고 있는 레이저 다이오드(21)로부터 빔이 주사되면, 이 빔은 콜리메이터렌즈(22)를 거치면서 수평의 주주사(main scanning direction)와 수직의 부주사(sub scanning direction)가 평행한 평행빔으로 정형된 다음 슬릿(23)의 장방형 구멍(23a)과 실린드리컬 렌즈(24)를 통과하면서 부주사방향으로 수렴된다.In the laser printer according to the present invention having such a configuration, when a beam is scanned from the laser diode 21 constituting the laser diode module 20, the beam passes through the collimator lens 22 and is horizontally scanned. The sub scanning direction perpendicular to the direction is shaped into a parallel parallel beam and then converges in the sub scanning direction while passing through the rectangular hole 23a of the slit 23 and the cylindrical lens 24.

이와같이 부주사방향으로 수렴된 빔은 고속으로 회전하고 있는 폴리건 미러(25)에서 일정의 화각을 갖는 상태로 반사되고, 토릭렌즈(26a)와 포커싱렌즈(26b)로 이루어진 주사렌즈(26)에 의해 주주사방향으로 수렴된 상태로 감광드럼(40)상에 초점이 맺혀 원하는 화상(畵像)을 얻게된다.The beam converged in the sub-scanning direction is reflected by the polygon mirror 25 rotating at a high speed with a constant angle of view, and is made by the scanning lens 26 composed of the toric lens 26a and the focusing lens 26b. Focusing on the photosensitive drum 40 in a state converged in the main scanning direction to obtain a desired image.

또한 새시(30)상에 설치된 센서(50)를 통해 빔의 초기 입사위치를 감지하게 된다.In addition, the sensor 50 installed on the chassis 30 detects the initial incident position of the beam.

즉, 감광드럼(40)을 감싸고 있는 케이스(41)의 일단부에 위치된 센서(50)에 의해 빔의 초기 입사위치를 감지하게 된다.That is, the initial incident position of the beam is sensed by the sensor 50 located at one end of the case 41 surrounding the photosensitive drum 40.

이때 센서(50)를 통해 빔의 초기 위치를 감지함에 있어서는, 별도의 반사미러 없이 바로 레이저 빔이 센서(50)로 입사됨으로써 초기 위치의 감지가 좀더 빠르고 확실하게 수행되어진다.At this time, in detecting the initial position of the beam through the sensor 50, the laser beam is immediately incident to the sensor 50 without a separate reflection mirror, the detection of the initial position is more quickly and surely performed.

상술한 바와 같이 본 발명에 따른 레이저 프린터에 의하면, 레이저 빔이 감광드럼상으로 입사되는 초기 위치를 감지하기 위한 센서가 레이저 다이오드 모듈에 위치되지 않고 새시상에 즉, 감광드럼을 감싸고 있는 케이스상에 위치됨으로써 별도의 반사미러 없이도 신속하고 정확하게 빔의 초기 입사 위치 감지가 가능하게 된다.As described above, according to the laser printer according to the present invention, a sensor for detecting an initial position at which the laser beam is incident on the photosensitive drum is not positioned on the laser diode module but on the chassis, that is, on the case surrounding the photosensitive drum. Positioning allows fast and accurate detection of the initial incident position of the beam without the need for a separate reflecting mirror.

따라서 부품수 감소에 따른 단가절감을 도모한 이점과 특히 조립 작업성의 향상을 꾀한 이점이 있다.Therefore, there is an advantage of reducing the unit cost due to the reduction of the number of parts, and in particular, to improve the assembly workability.

Claims (2)

하우징과, 이 하우징의 내부에 위치되며, 광원인 레이저 다이오드와, 이 레이저 다이오드로부터 주사되는 빔을 정형시키는 콜리메이터 렌즈와 슬릿 및 그리고 주사렌즈로 이루어진 레이저 다이오드 모듈과;A laser diode module positioned within the housing, the laser diode being a light source, a collimator lens and a slit for shaping the beam scanned from the laser diode, and a scanning lens; 상기 하우징을 외측에서 감싸는 새시와;A chassis surrounding the housing from the outside; 상기 레이저 다이오드와 인접된 새시상에 위치되며, 상기 주사렌즈로부터 주사된 빔이 스폿되는 감광드럼과;A photosensitive drum positioned on a chassis adjacent to the laser diode, the photosensitive drum spotted by a beam scanned from the scanning lens; 상기 감광드럼의 외측면을 감싸며, 전면에는 레이저 빔이 입사되도록 감광드럼의 길이 방향을 따라 소정폭으로 장홈이 형성된 케이스와;A case surrounding an outer surface of the photosensitive drum and having a long groove formed at a predetermined width along a length direction of the photosensitive drum so that a laser beam is incident on a front surface thereof; 상기 레이저 다이오드 모듈의 외측에 설치되며, 상기 주사렌즈로부터 입사되는 레이저 빔의 초기 입사위치를 감지하는 센서;를 포함하여 된 것을 특징으로 하는 레이저 프린터.And a sensor installed outside the laser diode module and configured to detect an initial incident position of a laser beam incident from the scanning lens. 제 1 항에 있어서, 상기 센서는, 상기 감광드럼을 감싸고 있는 케이스의 일단부에 설치되는 것을 특징으로 하는 레이저 프린터.The laser printer according to claim 1, wherein the sensor is installed at one end of a case surrounding the photosensitive drum.
KR1019990039315A 1999-09-14 1999-09-14 Laser printer KR20010027526A (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100459103B1 (en) * 2002-09-17 2004-12-03 주식회사 에이디피엔지니어링 Defect inspection apparatus of substrate for FPD

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS63256449A (en) * 1987-04-15 1988-10-24 Canon Inc Laser beam printer
JPH0662191A (en) * 1992-08-12 1994-03-04 Minolta Camera Co Ltd Laser beam optical system
JPH1090623A (en) * 1995-08-22 1998-04-10 Minolta Co Ltd Laser beam optical scanner

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS63256449A (en) * 1987-04-15 1988-10-24 Canon Inc Laser beam printer
JPH0662191A (en) * 1992-08-12 1994-03-04 Minolta Camera Co Ltd Laser beam optical system
JPH1090623A (en) * 1995-08-22 1998-04-10 Minolta Co Ltd Laser beam optical scanner

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100459103B1 (en) * 2002-09-17 2004-12-03 주식회사 에이디피엔지니어링 Defect inspection apparatus of substrate for FPD

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