scispace - formally typeset
Patent

Signal control circuit and image formation device

Mitsuo Azumai, +1 more
Reads0
Chats0
TLDR
In this article, the retarding signal synchronizing with the reverse signal of the PWM signal P02 output from the other PWM formation circuit was detected by a retarding-quantity measuring circuit and the measured result was preserved by a FF(Flip Flop)34.
Abstract: 
PROBLEM TO BE SOLVED: To make it possible to realize a normal output of PWM signal by an inexpensive means. SOLUTION: One side of the two PWM formation circuits, which are installed in an image formation device 100 such as high-speed copying machines carrying out the simultaneous luminescence of the two beams, forms two or more retarding signals of different delay time from the PWM signal P02 output from the other PWM formation circuit by a delay circuit 32 at a test mode. By detecting the retarding signal synchronizing with the reverse signal of the PWM signal P02 output from the other PWM formation circuit among two or more retarding signals formed by the delay circuit according to a retarding-quantity measuring circuit 33, the pulse width of the PWM signal P02 is measured, and the measured result of the retarding-quantity measuring circuit 33 is preserved by a FF(Flip Flop)34. COPYRIGHT: (C)2005,JPO&NCIPI

read more

Citations
More filters
Patent

Electronic device and image forming apparatus

Yoshihiro Osada, +1 more
TL;DR: In this paper, the authors proposed a method to prevent a circuit of a post stage from being affected, even if a delay amount by a delay circuit inside an operation circuit varies dynamically, because of power supply voltage shift or temperature fluctuation, or the like in an electronic device including an image forming apparatus.
Patent

Image processing device, image formation device, abnormality determination method

Kato Yusuke
TL;DR: In this paper, a control part 5 of an image formation device 10 inputs a BD signal as a calibration signal in an input buffer 202 of a delay chain circuit during non image processing time.
Patent

Driver ic chip, drive device, print head, image forming apparatus and display device

Akira Nagumo
TL;DR: In this paper, the authors proposed an approach to shorten the time required to transfer a drive data signal in a driver IC chip by using a delay circuit in the front stage of shift resisters (SFRa-SFRd).