Title:
【発明の名称】画像形成装置及び電子線装置及び変調回路及び画像形成装置の駆動方法
Document Type and Number:
Japanese Patent JP3073486
Kind Code:
B2
Abstract:
An image forming apparatus which performs pulsewidth modulation with a pulsewidth set by counting a clock. Especially, for grayscale level correction by setting the frequency of the clock, the periodic clock is counted, and an output pattern is changed in accordance with a count value of the clock. Otherwise, information corresponding to a clock pattern is stored in advance, and the information is sequentially read and used as a clock. Otherwise, a clock source in which the frequency is controlled by a control signal is used.
Inventors:
Naoto Abe
Application Number:
JP3225599A
Publication Date:
August 07, 2000
Filing Date:
February 10, 1999
Export Citation:
Assignee:
Canon Inc
International Classes:
G09G3/20; G09G3/22; H01J1/304; H01J1/312; H01J1/316; G09G5/00; (IPC1-7): G09G3/20; G09G3/20; G09G3/22
Domestic Patent References:
| JP5249920A | ||||
| JP61109316A | ||||
| JP24004A | ||||
| JP1209493A | ||||
| JP2135421A | ||||
| JP5241526A | ||||
| JP6371889A | ||||
| JP497277A | ||||
| JP4138495A |
Attorney, Agent or Firm:
Yasunori Otsuka (2 outside)