A printing apparatus includes: a carriage movable in a width direction intersecting a conveyance direction; a first detection unit provided on one side of the carriage in the width direction and capable of detecting an end portion of the print medium; and a second detection unit provided on the other side of the carriage in the width direction and capable of detecting the end portion, at least one of the first and second detection units includes: a light emitting unit configured to emit light to a platen and the print medium; a first light receiving unit capable of receiving reflected light from the platen and the print medium; and a second light receiving unit capable of receiving the reflected light from the platen and the print medium, overlapping the first light receiving unit in the conveyance direction, and spaced apart from the first light receiving unit in the width direction.

A printer includes a sub-scanning mover to execute a sub-scanning operation to move a placement table from an upstream side toward a downstream side in a sub-scanning direction, a main scanning mover to execute a main scanning operation to move at least one of a head or a light irradiator in a main scanning direction, and a controller configured or programmed to control a normal mode in which the main scanning operation and the sub-scanning operation are alternately executed, the main scanning operation being an operation to emit the light, with a first region of the light irradiator being lit, the first region being located downstream of an upstream end of the nozzle row in the sub-scanning direction, and cause a main scanning operation for irradiation to be executed after completion of a last sub-scanning operation in the normal mode.

A liquid ejecting apparatus includes a load drive circuit that outputs a drive signal. The drive circuit includes a first gate drive circuit that outputs a first gate drive signal corresponding to a modulated signal output by a modulation circuit; a second gate drive circuit that outputs a second gate drive signal corresponding to the modulated signal; and an amplification circuit that outputs an amplified modulated signal by driving of a first transistor driven in response to the first gate drive signal and a second transistor driven in response to the second gate drive signal. The first transistor and the second transistor include gallium nitride. The first gate drive circuit and the first transistor are accommodated in a single package and constitute a first semiconductor device. The second gate drive circuit and the second transistor are accommodated in a single package and constitute a second semiconductor device.

A printing apparatus includes a head, a carriage, an encoder including a scale, a first light emitting element and a first light receiving element, a measuring sensor including a second light emitting element and a second light receiving element, and a controller. The controller is configured to perform a printing operation of causing the head to eject ink while moving the carriage based on a signal output by the encoder, a measuring operation of moving the carriage based on a signal output by the encoder, causing the second light emitting element to emit light onto a measuring position of the scale, and receiving light reflected from or passing through the measuring position using the second light receiving element, and a calculating operation of calculating lifetime of the scale based on a light amount received by the second light receiving element.