KR930022241A

KR930022241A - Image Forming Device

Info

Publication number: KR930022241A
Application number: KR1019920005904A
Authority: KR
Inventors: 가즈히꼬 다까하시
Original assignee: 미야하라 아끼라; 후지제록스 가부시끼가이샤
Priority date: 1992-04-09
Filing date: 1992-04-09
Publication date: 1993-11-23
Also published as: KR940009717B1

Abstract

레이저 프린터등의 화상형성장치에 있어서 회전다면체의 회전속도를 바꾸지 않고 주주사밀도나 인자속도를 변경가능하게 하는 것을 목적으로 하고 레이저 발진기(11)로 부터 변조기(12)를 거쳐서 출력된 레이저빔(13)은 플리곤미러(102)의 각면에서 반사, 편향되고 감광체드럼(106)의 주주사방향(M)으로 반복하여 주사된다. 레이저빔(13)은 각 주주사의 개시전의 빔위치(16)에서 빔검출기(22)로 입사되고 빔검지신호(24)가 출력된다. 수평동기신호제어회로(23)는 인자속도제어회로(26) 및 주사밀도제어회로(28)로부터 주어진 인자속도정보(27)나 주사밀도정보(29)에 따라서 빔검지신호(24)를 솎아냄으로써 이 펄스간격을 소정의 값으로 변경하여 수평동기 신호(31)로서 출력한다. 화상정보처리장치(126)는 수평동기신호(31)의 입력마다에 1라인분의 화상정보(38)를 레이저 제어장치(15)로 공급한다.In an image forming apparatus such as a laser printer, a laser beam 13 outputted from the laser oscillator 11 via the modulator 12 to change the main scanning density or the printing speed without changing the rotational speed of the rotating polyhedron. ) Is reflected and deflected on each side of the plygon mirror 102 and repeatedly scanned in the main scanning direction M of the photosensitive drum 106. The laser beam 13 is incident on the beam detector 22 at the beam position 16 before the start of each main scan, and the beam detection signal 24 is output. The horizontal synchronous signal control circuit 23 subtracts the beam detection signal 24 in accordance with the printing speed information 27 or the scanning density information 29 given from the printing speed control circuit 26 and the scanning density control circuit 28. The pulse interval is changed to a predetermined value and output as the horizontal synchronous signal 31. The image information processing device 126 supplies the laser control device 15 with one line of image information 38 for each input of the horizontal synchronization signal 31.

Description

Image Forming Device

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

제1도는 본 발명의 일실시예의 화상형성장치의 개략구성도.1 is a schematic structural diagram of an image forming apparatus according to one embodiment of the present invention;

제2도는 제1실시예에 있어서의 화상형성장치의 요부를 나타낸 블럭도.Fig. 2 is a block diagram showing the main parts of the image forming apparatus in the first embodiment.

제3도는 수평동기신호와 화상정보와의 관계를 나타낸 타이밍도.3 is a timing diagram showing a relationship between a horizontal synchronization signal and image information.

Claims

A photosensitive member moving in a predetermined direction, a laser beam output means for outputting a laser beam modulated in accordance with a speech signal, and a main scanning direction different from the sub-scanning direction which is the moving direction on the photosensitive member by reflecting the laser beam on each surface while rotating at a constant speed Means for determining the spacing of the surfaces of the rotating polyhedron used for reflection of the laser beam in response to at least one of the rotating polyhedron to be irradiated repeatedly, and the request for changing the scanning density in the sub-scanning direction and changing the printing speed. And picture signal supply means for supplying picture signals one by one in synchronization with a plane of a predetermined interval determined to be used by said determining means.

※ Note: The disclosure is based on the initial application.