Alps Alpine

Provided is an electronic device capable of effectively cooling heat radiated from a heat-generating electronic component provided in a case by a heat sink, and inhibiting any impact on electronic circuits and the like by moisture intruding into the case. A heat sink provided inside the case has a plurality of protrusions extending perpendicularly toward a facing wall part of the case. Air entering the case from a first air intake hole formed in the facing wall part is dispersed and periodically diffused by the protrusions, and exhausted outside via a gas exhaust hole by a power fan. Moisture intruding into the case is drained downward through a water draining path along upper surfaces of a first bank part and a second bank part.

A display device for displaying a floating aerial image using retroreflection includes a light source, a beam splitter, at least first and second retroreflection members disposed along different planes, and at least first and second phase plates disposed on respective surfaces of the first retroreflection member and the second retroreflection member, wherein the beam splitter is configured to reflect light from the light source to the first and second retroreflection members, and to transmit light reflected by the first and second retroreflection members so as to form the floating aerial image, and a slow axis of the first phase plate has an angle difference with respect to a slow axis of the second phase plate such that a difference between a phase difference of the light transmitted through the first phase plate and a phase difference of the light transmitted through the second phase plate becomes small.

A displacement-detecting device for a speaker includes a magnet fixed to a vibration body configured to vibrate by air vibration caused by vibration of a vibration system of the speaker, a sensor provided at a fixed body relative to a fixed system of the speaker, a displacement detector, and a displacement converter. The sensor is configured to detect a magnetic flux vector of the magnet acting on the sensor. The displacement detector is configured to detect a displacement of a vibration system of a passive radiator based on a detection value of the magnetic flux vector by the sensor. The displacement converter is configured to convert the displacement of the vibration system of the passive radiator to a displacement of the vibration system of the speaker.

An acoustic system includes a speaker; a driver configured to drive the speaker by a drive signal generated from an audio signal to be input; and a displacement estimator. The speaker includes a first magnetic gap, a second magnetic gap overlapping the first magnetic gap as viewed in an axial direction of the speaker, and a first voice coil and a second voice coil that are fixed to a vibration system of the speaker configured to vibrate in the axial direction, such that the first voice coil and the second voice coil are positioned in the first magnetic gap and the second magnetic gap as viewed in the axial direction.

A holder and an electronic component are provided. The holder is formed of an elastic material and is configured to hold an object. The holder includes a first surface configured to mount the holder onto a mounting surface of a member; and a second surface opposite the first surface. At least one groove configured to hold the object is formed on the second surface. The holder is configured such that a size of an opening of the groove on the second surface becomes smaller, as the first surface deforms.

An aspect of the present invention relates to an apparatus (1) for liquid cooling at least one integrated circuit (IC1, IC2, IC3), comprising: at least one heat-conducting plate (10) configured to be in thermal contact with the at least one integrated circuit (IC1, IC2, IC3); a casing (20) to which the at least one heat-conducting plate (10) is attached, the casing (20) comprising: an inlet section (30) comprising an inlet (31) for receiving a cooling liquid (CL); a manifold section (40) that is tapered and configured to control a flow (F) of the cooling liquid (CL) from the inlet section (30) into the manifold section (40) and change a flow direction of the cooling liquid (CL) from a first direction (D1) from the inlet section (30) into the manifold section (40) to a second direction (D2) transverse to the first direction (D1), the first direction (D1) and the second direction (D2) being parallel to a principal plane (11) of the at least one heat-conducting plate (10); a flow input control section (50) comprising a plurality of solid flow input control segments (51) that form flow input passages (52) between them and are configured to control the flow (F) of the cooling liquid (CL) in the second direction (D2) from the manifold section (40) into a cooling section (60) of the casing (20); the cooling section (60) comprising a plurality of heat sink elements (61, 64) at least a part of which is in thermal contact with the at least one heat-conducting plate (10) and that are configured to transfer heat from the at least one heat-conducting plate (10) to the cooling liquid (CL) flowing from the flow input control section (50) through the cooling section (60); and an outlet section (70) comprising an outlet (71) for outputting the cooling liquid (CL) from the cooling section (60). Another aspect relates to a vehicle (1000) comprising such an apparatus (1).

A multilayer board includes a first conductor layer, a second conductor layer, and an insulating layer. The first conductor layer and the second conductor layer are stacked via the insulating layer. The first conductor layer includes a plurality of lands to which an electrode of an electronic component for surface mounting is to be soldered. The second conductor layer includes an interconnect pattern electrically connected to the lands via a conductive through-hole formed in the insulating layer. The plurality of lands have a same planar shape.

A tear-prevention structure for a multilayer substrate having a plurality of interconnect layers laminated via an insulating layer is provided. The tear-prevention structure includes a tear-prevention conductor pattern formed in proximity to a slit or a hole provided in the multilayer substrate, and the conductor pattern is formed in at least two layers of the plurality of the interconnect layers of the multilayer substrate.

An aspect of the present invention relates to an apparatus (10) for liquid cooling at least one data processing unit (102), comprising: an inlet (12) for receiving a cooling liquid; an outlet (14) for outputting the cooling liquid; an internal cavity (16) arranged between the inlet (12) and the outlet (14) and fluidically connecting the inlet (12) and the outlet (14); at least one heat-conducting plate (18) extending along a side of the internal cavity (16) and comprising a heat-conducting material and configured to be in thermal contact with the at least one data processing unit (102); and a plurality of discrete heat-conducting objects (20) each comprising a heat-conducting material and arranged in the internal cavity (16) in a pattern; wherein each of the plurality of heat-conducting objects (20) contacts at least another one of the plurality of heat-conducting objects (20) in the internal cavity (16); wherein at least one of the plurality of heat-conducting objects (20) is in thermal contact with the at least one heat-conducting plate (18); and wherein the plurality of heat-conducting objects (20) are arranged in the internal cavity (16) such that, when the apparatus (10) is in a liquid cooling operation, the cooling liquid at least partially surrounds the heat-conducting objects (20). Further aspects relate to an electronic device comprising such an apparatus and a vehicle comprising such an electronic device.

A display device includes: a plurality of light-emitting elements; and a circuit substrate with a surface configured for mounting the plurality of light-emitting elements. The plurality of light-emitting elements are arranged on the circuit substrate to form a fixed display pattern. Part or all of the plurality of light-emitting elements are connected in series via wires.