An electronic device includes a circuit board and an electric element mounted on the circuit board. The electric element includes a multilayer body made of electrically insulating base materials, a transmission line portion, and connection portions. The transmission line portion and the connection portions are provided in the multilayer body. Each of the connection portions is continuous with a corresponding portion of the transmission line portion, and is connected to the circuit board by an electrically conductive bonding material. The transmission line portion other than the connection portions is not electrically connected to an electronic component on the circuit board. The electronic component not electrically connected to the electric element is disposed between the transmission line portion of the electric element and the circuit board.

A circuit board includes a multilayer body including a main surface, a mounted conductor, and a signal conductor at an intermediate position in the lamination direction of the multilayer body, and a ground conductor on the main surface. The multilayer body includes a connection portion including a portion overlapping the mounted conductor and overlapping an external board joined via a conductive joint material through use of the mounted conductor, and a circuit portion. A first region, which is the region of a circuit portion of the ground conductor, includes opening holes and a second region, which is the region of a connection portion of the ground conductor, includes opening holes. The ratio of the opening area of the opening holes to that of the second region is larger than the ratio of the opening area of the opening holes to that of the first region.

A circuit board includes a multilayer body including a main surface, a mounted conductor, and a signal conductor at an intermediate position in the lamination direction of the multilayer body, and a ground conductor on the main surface. The multilayer body includes a connection portion including a portion overlapping the mounted conductor and overlapping an external board joined via a conductive joint material through use of the mounted conductor, and a circuit portion. A first region, which is the region of a circuit portion of the ground conductor, includes opening holes and a second region, which is the region of a connection portion of the ground conductor, includes opening holes. The ratio of the opening area of the opening holes to that of the second region is larger than the ratio of the opening area of the opening holes to that of the first region.

An electronic device may include a printed circuit board including a connector configured to move between a first position and a second position on the printed circuit board; an antenna; a support member that is disposed between the printed circuit board and the antenna in a direction in which the printed circuit board, the support member, and the antenna are stacked; a signal connection member that is electrically connected to the connector of the printed circuit board; and a conductive member disposed between the printed circuit board and the support member, and aligned to cover the first position and the second position of the printed circuit board.

A voltage regulator module includes a circuit board, a positive input terminal, a negative input terminal, a positive output terminal, a negative output terminal, a switching circuit, a magnetic element and an input capacitor. The switching circuit is disposed on a top surface of the circuit board, and comprises two switches connected in series to form a midpoint, wherein the switching circuit is connected to the positive input terminal. The magnetic element comprises a magnetic core and a conductive structure in the circuit board, wherein the magnetic element and the switching circuit are arranged on the circuit board along a first direction, the conductive structure is connected to the midpoint of the corresponding switching circuit and the positive output terminal. The input capacitor is connected to the positive input terminal and the negative input terminal, and disposed on a bottom surface of the circuit board.

An information handling system may include an organic light-emitting diode (OLED) display layer of a video display to display an image to a user; an A-cover forming a housing behind the OLED display layer; and a physically bifurcated display daughter board between the OLED display layer and the A-cover, the physically bifurcated display daughter board including: a first portion of the display daughter board including a source driver integrated circuit (IC) operatively coupled to a processor to receive graphics data; and a second portion of the display daughter board comprising a power management integrated circuit (PMIC) operatively coupled to the first portion and a power source; the second portion of the display daughter board being mechanically coupled to an interior surface of the A-cover to dissipate heat away from the OLED display layer.

A voice coil motor including a first magnetic piece, a second magnetic piece, a third magnetic piece, and a counterweight, with the first magnetic piece, the second magnetic piece, the third magnetic piece, and the counterweight radially and sequentially arranged around an optical carrier, a first plurality of coils symmetrically fastened on two sides of the optical carrier, where the first plurality of coils includes a first coil and a second coil, the first coil is disposed opposite the first magnetic piece, and the second coil is disposed opposite the third magnetic piece, a first magnetic sensor, and a first induction magnet disposed opposite the first magnetic sensor. The first magnetic sensor is disposed on a side of the counterweight that is adjacent to the optical carrier, and the first induction magnet is fastened on an outer wall of the optical carrier that is adjacent to the counterweight.

A voice coil motor including a first magnetic piece, a second magnetic piece, a third magnetic piece, and a counterweight, with the first magnetic piece, the second magnetic piece, the third magnetic piece, and the counterweight radially and sequentially arranged around an optical carrier, a first plurality of coils symmetrically fastened on two sides of the optical carrier, where the first plurality of coils includes a first coil and a second coil, the first coil is disposed opposite the first magnetic piece, and the second coil is disposed opposite the third magnetic piece, a first magnetic sensor, and a first induction magnet disposed opposite the first magnetic sensor. The first magnetic sensor is disposed on a side of the counterweight that is adjacent to the optical carrier, and the first induction magnet is fastened on an outer wall of the optical carrier that is adjacent to the counterweight.

The present disclosure relates to a display apparatus and an electronic device, relating to the technical field of display. The display apparatus may comprise a display panel, a main circuit board, a bridging circuit board, and a first shielding adhesive tape. The main circuit board may be provided on the back surface of the display panel; the bridging circuit board may be provided at the side of the main circuit board distant from the display panel, and may be connected to the main circuit board in a binding mode; and the first shielding adhesive tape may be provided at the side of the main circuit board distant from the display panel, and expose the bridging circuit board.

A printed circuit board module comprises: a first printed circuit board; a second printed circuit board arranged on one surface of the first printed circuit board; a third printed circuit board arranged on the other surface of the first printed circuit board; and a core passing through the first printed circuit board to the third printed circuit board, wherein the second printed circuit board includes a first coil, the third printed circuit board includes a second coil, and the cross-sectional area of the second printed circuit board and the third printed circuit board is less than the cross-sectional area of the first printed circuit board.