Abstract: An electrostatic discharge protection circuit is provided. The electrostatic discharge protection circuit includes an electrostatic discharge detection circuit, a discharge circuit, and a switch. The electrostatic discharge detection circuit detects whether an electrostatic discharge event occurs at the bounding pad to generate a first detection circuit. The discharge circuit receives the first detection signal. When the electrostatic discharge event occurs at the bounding pad, the discharge circuit provides a discharge path between the bounding pad and a ground terminal according to the first detection signal. The switch is coupled between the core circuit and the ground terminal and controlled by the first detection signal. When the electrostatic discharge event occurs at the bounding pad, the switch is turned off according to the first detection signal.

Abstract: A mobile device includes a metal back cover, a dielectric substrate, a grounding metal element, a first radiation element, and a second radiation element. The metal back cover has a slot. The dielectric substrate has a first surface and a second surface, and the second surface faces the slot. The grounding metal element extends onto the first surface of the dielectric substrate. The first radiation element has a feeding point, and is disposed on the first surface of the dielectric substrate. The first vertical projection of the first radiation element at least partially overlaps the slot. The second radiation element is disposed on the second surface of the dielectric substrate. The second vertical projection of the second radiation element at least partially overlaps the slot. An antenna structure is formed by the first radiation element, the second radiation element, and the slot of the metal back cover.

Abstract: A mobile device includes a metal back cover, a ground metal element, a feeding radiation element, and a dielectric substrate. The metal back cover has a slot. The feeding radiation element has a feeding point, and includes a first feeding branch, a second feeding branch, and a third feeding branch. The second feeding branch and the first feeding branch extend in opposite directions. The third feeding branch and the first feeding branch extend in the same direction. The feeding radiation element has a vertical projection on the metal back cover, and the vertical projection at least partially overlaps the slot. The dielectric substrate is disposed adjacent to the metal back cover. The ground metal element and the feeding radiation element are disposed on the dielectric substrate. An antenna structure is formed by the feeding radiation element and the slot of the metal back cover.

Abstract: An anti-floating circuit including a first pull-high circuit, a first pull-low circuit and a first control circuit is provided. The first pull-high circuit includes a first P-type transistor and a second P-type transistor and is coupled to a first power terminal. The first pull-low circuit includes a first N-type transistor and a second N-type transistor and is coupled to a second power terminal. A first path is between the first P-type transistor and the first N-type transistor. A second path is between the second P-type transistor and the second N-type transistor. A third path is between the first P-type transistor and the second power terminal. In the first mode, the control circuit turns on the first and second paths and turns off the third path. In the second mode, the control circuit turns off the first and second paths and turns on the third path.

Abstract: A mobile device includes a metal back cover, a ground metal element, a feeding radiation element, and a dielectric substrate. The metal back cover has a slot. The feeding radiation element has a feeding point, and includes a first feeding branch, a second feeding branch, and a third feeding branch. The second feeding branch and the first feeding branch extend in opposite directions. The third feeding branch and the first feeding branch extend in the same direction. The feeding radiation element has a vertical projection on the metal back cover, and the vertical projection at least partially overlaps the slot. The dielectric substrate is disposed adjacent to the metal back cover. The ground metal element and the feeding radiation element are disposed on the dielectric substrate. An antenna structure is formed by the feeding radiation element and the slot of the metal back cover.

Abstract: An optical sensing device includes a thin film transistor disposed on a substrate, an optical sensor, a planar layer, and an organic light emitting diode. The optical sensor includes a metal electrode disposed on a gate dielectric layer of the thin film transistor and connecting to a drain electrode of the thin film transistor, an optical sensing layer disposed on the metal electrode, and a first transparent electrode disposed on the optical sensing layer. The planar layer covers at least a part of the thin film transistor and the optical sensor. The organic light emitting diode is disposed on the planar layer. The anode electrode and the cathode electrode of the organic light emitting diode are electrically coupled to a gate line and a data line respectively.