JPS5521049A - Electrophotographic printing device - Google Patents

Electrophotographic printing device

Info

Publication number
JPS5521049A
JPS5521049A JP9365378A JP9365378A JPS5521049A JP S5521049 A JPS5521049 A JP S5521049A JP 9365378 A JP9365378 A JP 9365378A JP 9365378 A JP9365378 A JP 9365378A JP S5521049 A JPS5521049 A JP S5521049A
Authority
JP
Japan
Prior art keywords
differing
frequency
dots
pieces
sets
Prior art date
Legal status (The legal status 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 status listed.)
Pending
Application number
JP9365378A
Other languages
Japanese (ja)
Inventor
Akinori Watanabe
Masaaki Shiragami
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Oki Electric Industry Co Ltd
Original Assignee
Oki Electric Industry Co Ltd
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 Oki Electric Industry Co Ltd filed Critical Oki Electric Industry Co Ltd
Priority to JP9365378A priority Critical patent/JPS5521049A/en
Publication of JPS5521049A publication Critical patent/JPS5521049A/en
Pending legal-status Critical Current

Links

Abstract

PURPOSE: To keep the printing density constant, by selectively applying ultrasonic vibrations of 2N-1 sets differing in frequency to crystal bodies of lead molybdata or the like to deflect the light, and forming dot latent image with laser beams of less than N pieces.
CONSTITUTION: According to the number of dots to be printed, switches 6a, 6b ... are closed, and, for instance, seven pieces of ultrasonic wave oscillators 7a, 7b ... differing in frequency are selectively connected, while control pulses are applied to specified terminals 9a, 9b ..., and corresponding AND gates 11a, 11b ... are opened. As a result, (7-1) pieces of ultrasonic wave transmitters 7h, 7i ... differing in frequency through mixers 10a, 10b ... differing in the number of mixing are selected, and a crystal body 4 of lead molybdata or the like is excited by (7×2-1) sets of ultrasonic waves differing in frequency, regardless of the selected number of dots, and the crystal body grating change is controlled, so that a laser beam 2 becomes (7×2-1) sets of light beams having the same intensity and differing in the direction of deflection, according to the frequency of ultrasonic wave applied. Therefore, a latent image uniform in density may be formed on a drum 1 by the light beams not shielded by a shielding plate 8, regardless of the number of dots to be printed.
COPYRIGHT: (C)1980,JPO&Japio
JP9365378A 1978-08-02 1978-08-02 Electrophotographic printing device Pending JPS5521049A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP9365378A JPS5521049A (en) 1978-08-02 1978-08-02 Electrophotographic printing device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP9365378A JPS5521049A (en) 1978-08-02 1978-08-02 Electrophotographic printing device

Publications (1)

Publication Number Publication Date
JPS5521049A true JPS5521049A (en) 1980-02-14

Family

ID=14088331

Family Applications (1)

Application Number Title Priority Date Filing Date
JP9365378A Pending JPS5521049A (en) 1978-08-02 1978-08-02 Electrophotographic printing device

Country Status (1)

Country Link
JP (1) JPS5521049A (en)

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