| CPC B41J 2/04581 (2013.01) [B41J 2/04541 (2013.01); B41J 2/14233 (2013.01); B41J 2002/14491 (2013.01)] | 12 Claims |
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1. A liquid discharge device comprising:
a discharge head that includes a first piezoelectric element having a first electrode and a second electrode, and a second piezoelectric element having a third electrode and a fourth electrode, and that discharges a liquid by driving the first piezoelectric element and the second piezoelectric element; and
a wiring substrate through which a drive signal for driving the first piezoelectric element and the second piezoelectric element propagates, and includes a plurality of wiring layers provided along a first direction and a via wiring electrically coupling layers of the plurality of wiring layers, wherein
a first wiring layer among the plurality of wiring layers includes
a first wiring through which a first drive signal supplied to the first electrode for driving the first piezoelectric element such that the liquid is discharged from the discharge head propagates, among the drive signals,
a second wiring through which a second drive signal supplied to the third electrode for driving the second piezoelectric element such that the liquid is discharged from the discharge head propagates, among the drive signals, and
a third wiring in which at least a part thereof is located in an inter-wiring region between the first wiring and the second wiring,
a second wiring layer among the plurality of wiring layers includes
a fourth wiring through which a third drive signal supplied to the first electrode for driving the first piezoelectric element such that the liquid is not discharged from the discharge head propagates, among the drive signals, and
a fifth wiring through which a reference voltage signal supplied to the second electrode and the fourth electrode and having a constant voltage value propagates,
the wiring substrate includes
a first terminal that outputs the first drive signal, and
a second terminal that outputs the second drive signal,
the first wiring layer and the second wiring layer are located adjacent to each other in the plurality of wiring layers,
in a direction along the first direction, at least a part of the fourth wiring is located so as to overlap with the inter-wiring region,
the inter-wiring region includes a wide inter-wiring region in which an inter-wiring distance between the first wiring and the second wiring is larger than a sum of a wire width of the fourth wiring and a minimum diameter of the via wiring, and a narrow inter-wiring region in which the inter-wiring distance is smaller than the sum of the wire width of the fourth wiring and the minimum diameter of the via wiring, and larger than a wire width of the via wiring, and
the third wiring is not located in the narrow inter-wiring region between a virtual line coupling the first terminal and the second terminal, and the wide inter-wiring region, in the inter-wiring region of the first wiring layer.
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