Abstract: A semiconductor device includes a semiconductor stack, a third semiconductor structure, a dielectric layer, and a reflective layer under the third semiconductor structure. The semiconductor stack includes a first semiconductor structure, an active structure, a second semiconductor structure. The first semiconductor structure has a first surface which includes a first portion and a second portion, and the first surface has a first area. The third semiconductor structure connects to the first portion, and has a second surface with a second area. The dielectric layer connects to the second portion and includes a plurality of openings, and the plurality of openings have a third area. A ratio of the second area to the first area is between 0.1˜0.7, and a ratio of the third area to the first area is less than 0.2.

Abstract: A tension adjusting mechanism for a toothed belt for driving a printer head of an inkjet printer is disclosed. The tension adjusting mechanism includes a housing secured to a frame of the printer. An electromagnet is secured to the housing, and a magnet movably is received in the housing and is repulsed by the electromagnet. A linkage is drivably connected with the magnet and a pulley is drivably connected with the linkage. The toothed belt engages with a circumferential periphery of the pulley. The adjustment of the tension force of the toothed belt is achieved by changing a current applied to the electromagnet to change the repulsive force of the electromagnet acting on the magnet.

Abstract: A paper output structure includes a printer enclosure and a paper output extending device. The paper output extending device includes a pivot shaft, a drive gear, and a toothed bar which is capable of internal telescopic extension by means of a drive gear which includes a great gear portion and a first small gear portion. A printed sheet of paper is slightly stretched so as to be dropped uncrinkled and perfectly flat into the output tray.

Abstract: A paper output structure includes a printer enclosure and a paper output extending device. The paper output extending device includes a pivot shaft, a drive gear, and a toothed bar which is capable of internal telescopic extension by means of a drive gear which includes a great gear portion and a first small gear portion. A printed sheet of paper is slightly stretched so as to be dropped uncrinckled and perfectly flat into the output tray.

Abstract: A paper transmission apparatus includes a paper-in mechanism including a first roller, a paper-out mechanism including a second roller, a gear assembly, and a swing member. The swing member is connected to the first roller to the gear assembly. The first roller is rotatable along a first direction to rotate the swing member, and the swing member is capable of moving the gear assembly to be meshed with the second roller, to accelerate a rotating speed of the second roller being greater than a rotating speed of the first roller. The first roller is rotatable along a second direction opposite to the first direction to rotate the swing arm, and the swing arm is capable of moving the gear assembly to be meshed with the second roller, to decelerate the rotating speed of the second roller being smaller than the rotating speed of the firs roller.

Abstract: A paper reversing assembly includes a paper roller, a driving member, and a plurality of balls. The paper roller includes a recess defined in an end portion thereof and a plurality of concave portions formed on the internal circumferential sidewall of the recess. The driving member is received in the recess and includes a plurality of lobes, which interact with the balls to allow the free rotation of the paper roller when the paper is being pulled out.

Abstract: A media retrieval mechanism includes a pivot shaft, a media delivery device and a driving device. The media delivery device is capable of rotating about the pivot shaft. The media delivery device includes a contact portion and a rotating arm. The contact portion is capable of engaging at least one media. The driving device is attached to the pivot shaft. The driving device is capable of being driven by the pivot shaft. The driving device includes a driving member and the driving member includes a driving arm. The driving arm is capable of directing the rotating arm to angle the media delivery device thereby elevating the contact portion from the lower position to a lift-up position for disengaging the at least one media.

Abstract: A media retrieval mechanism includes a pivot shaft, a media delivery device and a driving device. The media delivery device is capable of rotating about the pivot shaft. The media delivery device includes a contact portion and a rotating arm. The contact portion is capable of engaging at least one media. The driving device is attached to the pivot shaft. The driving device is capable of being driven by the pivot shaft. The driving device includes a driving member and the driving member includes a driving arm. The driving arm is capable of directing the rotating arm to angle the media delivery device thereby elevating the contact portion from the lower position to a lift-up position for disengaging the at least one media.