| 摘要 |
PROBLEM TO BE SOLVED: To provide a non-ejection detecting circuit of an inkjet recorder which can detect a resonance frequency of an acoustic system admittance of a piezoelectric head by a high SN ratio, and to provide an inspection method of an inkjet recorder, and an inkjet recorder. SOLUTION: A bridge circuit 26 is constituted of a head 10 (an on resistance Rd of a switch SWn and a head equivalent circuit 11), a current detecting resistance Rs connected in series with the head 10, a resistance Rd set outside the same head 10 as the on resistance Rd, a capacitor C connected in series with the resistance Rd and set outside of the head 10, and a current detecting resistance Rs connected in series with the capacitor C. A signal of a trapezoidal waveform is inputted to between the resistance Rd and the head 10 from a driving circuit 24. Between two current detecting resistances Rs is grounded. COPYRIGHT: (C)2006,JPO&NCIPI |
