Patent ID: 8294646

Claim:
A display apparatus comprising: a frame including an inner edge and an inner side; a display panel including a pixel area exceeding the area enclosed by the inner edge of the frame, wherein the pixel area covers the area enclosed by the inner edge when the pixel area is in a predetermined position; a control chip; a photoelectric sensor disposed on the inner side of the frame and located corresponding to a corner of the pixel area in the predetermined position; and a micro-control circuit including a position offsetting interrupt program and an inner memory, wherein the photoelectric sensor is connected to the micro-control circuit, the inner memory of the micro-control circuit stores a sample value corresponding to an electronic signal received from the photoelectric sensor when the pixel area is in the predetermined position, when the display apparatus is turned on, the micro-control circuit sends an instruction to the control chip, directing the display panel to continuously provide a light spot at a corner of the pixel area of the display apparatus corresponding to the photoelectric sensor; wherein whenever the display apparatus is turned on, the micro-control circuit compares an electronic signal received from the photoelectric sensor with the sample value, if different, an interrupt is triggered to execute the position offsetting interrupt program of the micro-control circuit to adjust the display parameter of the display apparatus, thereby moving the pixel area to adjust the relative position of the light spot and the photoelectric sensor, so that the relative position becomes identical to the relative position of the light spot and the photoelectric sensor when the pixel area of the display panel is in the predetermined position.