Back to results
US 6,185,014 B2Granted
Multi-color image forming method and apparatus
AssigneeFuji Xerox Co., Ltd.
InventorAkira Ishii
Life of this patent
Estimating the term…
Abstract
An analog color image signal sent from a D/A converter is compared with a triangular-wave signal generated by a triangular-wave generator, to produce a pulse-width modulation signal serving as a dot signal. The phase of a clock signal supplied to the triangular-wave generator is shifted on a line-by-line basis to produce a screen angle of each color so that the initial phases become different from one another for the respective colors.
Claims5
A multi-color image forming apparatus comprising:
- means for receiving color image signals that are separated by color;
- means for assigning screen angles to the respective color image signals;
- means for generating clock signals having phases that deviate from one another sequentially by ⅛ of a period of a dot reference clock signals;
- and
- means for selecting one of the generated clock signals for each color on a scanning line basis so as to produce the respective assigned screen angles and to cause differences among initial phases for the respective colors.
2 more elements
A multi-color image forming method comprising the steps of:
- receiving color image signals that are separated by color;
- assigning screen angles to the respective color image signals;
- generating clock signals having phases that deviate from one another sequentially by ⅛ of a period of a dot reference clock signal;
- and
- selecting one of the generated clock signals for each color on a scanning line basis so as to produce the respective assigned screen angles and to cause differences among initial phases for the respective colors.
2 more elements
Dependencies are inferred from the claim text.