| 摘要 |
PROBLEM TO BE SOLVED: To perform heat storage correction of a thermal head at high speed and with high precision. SOLUTION: According to a heat storage correcting method, a heat storage state of a j-th heating element in a main scanning direction at the time of recording an i-th line is reflected on a parameterΘ(0, j), and heat storage states of first to third heat storage bodies are reflected on parametersΘ(1, j),Θ(2, j),Θ(3, j), respectively. Then a TDMA (TriDiagonal-Matrix Algorithm) is applied to the parameters in steps S4 to S7, and one row is simultaneously operated in the main scanning direction and updated. Next in a step S8, essential heating data Eout(j) is acquired from image data in an (i+1)-th line, and in steps S9, S10, the parametersΘ(2, j),Θ(1, j) at the time of recording the (i+1)-th line are operated and updated, followed by acquiring a corrected heat storage data Eh(i+1, j) in a step S11, from the essential heating data and the parameters at the time of recording the (i+1)-th line. In this manner, a long and huge polynomia which are necessary when using a finite filter, is dispensed with, and therefore operating speed of heat storage correction is improved. COPYRIGHT: (C)2007,JPO&INPIT
|
