Liquid discharging apparatus and driving circuit

1. A liquid discharging apparatus comprising:

a head unit; and

a driving circuit that drives the head unit, wherein

the head unit includes

a liquid discharging head that has a driving element, and that discharges a liquid with respect to a medium by driving the driving element,

a position detection circuit that outputs a position information signal indicative of a position of the liquid discharging head,

a first circuit that controls drive of the driving element based on a first signal, and

a first conversion circuit that is electrically coupled to the first circuit, and that converts a first optical signal into the first signal,

the driving circuit includes

a second circuit that outputs a second signal,

a second conversion circuit that is electrically coupled to the second circuit, and that converts the second signal into the first optical signal,

a first cable, and

a second cable,

the first cable connects the first conversion circuit to the second conversion circuit, and propagates the first optical signal, and

the second cable electrically couples the position detection circuit to the second circuit, and propagates the position information signal.

2. The liquid discharging apparatus according to claim 1 , wherein

the second signal is a signal indicative of image data to be formed on the medium.

3. The liquid discharging apparatus according to claim 1 , further comprising:

a carriage on which the liquid discharging head is mounted, and which moves while facing the medium,

wherein the position information signal includes a first position information signal indicative of the position of the liquid discharging head in a direction in which the carriage moves.

4. The liquid discharging apparatus according to claim 1 , wherein

the position information signal includes a second position information signal indicative of the position of the liquid discharging head in a direction in which the liquid is discharged with respect to the medium.

5. The liquid discharging apparatus according to claim 1 , wherein

the head unit includes an image reading circuit that acquires image information formed on the medium,

the image reading circuit outputs an image information signal indicative of the acquired image information, and

the image information signal is converted into a second optical signal in the first conversion circuit, and is propagated through the first cable.

6. The liquid discharging apparatus according to claim 1 , wherein

the second cable is a flexible flat cable.

7. A driving circuit for driving a head unit including

a liquid discharging head that has a driving element, and that discharges a liquid with respect to a medium by driving the driving element, a position detection circuit that outputs a position information signal indicative of a position of the liquid discharging head, a first circuit that controls drive of the driving element based on a first signal, and a first conversion circuit that is electrically coupled to the first circuit, and that converts a first optical signal into the first signal, the driving circuit comprising:

a second circuit that outputs a second signal,

a second conversion circuit that is electrically coupled to the second circuit, and that converts the second signal into the first optical signal,

a first cable, and

a second cable, wherein

the first cable connects the first conversion circuit to the second conversion circuit, and propagates the first optical signal, and

the second cable electrically couples the position detection circuit to the second circuit, and propagates the position information signal.