Image processing apparatus
First Claim
Patent Images
1. An image processing apparatus comprising:
- pulse width modulating means for receiving an image signal and processing the image signal to form a pulse width modulation signal;
means for performing optical modulation in response to the pulse width modulated signal from said pulse with modulating means;
means for generating a predetermined pattern signal; and
means for supplying the predetermined pattern signal to said pulse width modulating means so as to form a predetermined pulse width modulated signal independently of the image signal,wherein said pulse width modulating means independently processes either the received image signal or the predetermined pattern signal to form a pulse width modulated signal.
0 Assignments
0 Petitions
Accused Products
Abstract
An image processing apparatus has a semiconductor laser for modulating a light beam, a beam detector for detecting the beam, a selector for selecting an output from a digital data input unit or a black signal generator circuit, a comparator for pulse-width modulating an output from the selector received through a D/A converter, and a video enable (VE) signal generator circuit for generating a VE signal for switching the selector.
18 Citations
17 Claims
-
1. An image processing apparatus comprising:
- pulse width modulating means for receiving an image signal and processing the image signal to form a pulse width modulation signal;
means for performing optical modulation in response to the pulse width modulated signal from said pulse with modulating means; means for generating a predetermined pattern signal; and means for supplying the predetermined pattern signal to said pulse width modulating means so as to form a predetermined pulse width modulated signal independently of the image signal, wherein said pulse width modulating means independently processes either the received image signal or the predetermined pattern signal to form a pulse width modulated signal. - View Dependent Claims (3, 4, 5, 6, 7)
- pulse width modulating means for receiving an image signal and processing the image signal to form a pulse width modulation signal;
-
2. An image processing apparatus comprising:
-
means for receiving an image signal and binarizing the received image signal; means for generating a beam on the basis of a binary signal from said binarizing means; means for generating a predetermined signal so as to generate a beam representing a predetermined density; and means for selectively supplying either the image signal or the predetermined signal to said binarizing means, wherein said binarizing means binarizes either the received image signal or the predetermined signal to produce a binary signal. - View Dependent Claims (8, 9, 10, 11)
-
-
12. An image processing apparatus comprising:
-
means for receiving an image signal and multi-level processing the received image signal; means for forming an image in response to a gray-scale signal from said processing means; means for generating a pattern signal employed to form a timing signal for image formation by said forming means; and means for selectively supplying either the image signal or the pattern signal to said processing means, wherein said processing means processes the image signal or the pattern signal to produce the gray-scale signal. - View Dependent Claims (13, 14, 15, 16, 17)
-
Specification