Abstract: An electrical discharge machining equipment with equal-energy density comprises an electrode, a parameter database, a signal capturing device and a controller. The parameter database stores an equal-energy density sheet comprising a plurality of processing parameter sets. Each processing parameter set is corresponding to a material removed volume and comprises a discharge energy, a discharge parameter, a feed rate and an energy density. The signal capturing device detects a first discharge parameter of the electrode during machining a work piece. The controller selects a first feed rate to control the electrode. When the first discharge parameter changes to a second discharge parameter, the controller calculates a material volume of the workpiece according to the second discharge parameter and the equal-energy density sheet, and selects a second feed rate according to the material volume, the material removed volume and the equal-energy density sheet to control the electrode for processing the workpiece.

Abstract: The present disclosure provides an electronic device. The electronic device includes a first transceiving element, a second transceiving element disposed over the first transceiving element, and a radiating structure configured to radiate a first EM wave having a lower frequency and a second EM wave having a higher frequency. The first transceiving element and the second transceiving element are collectively configured to provide a higher gain or bandwidth for the first EM wave than for the second EM wave.

Abstract: A protective case applied to assemble to a handheld electronic device is provided. The protective case includes an inner surface, an outer surface, a connector, a plurality of first detachable connecting structures, and a plurality of first electrical connecting structures. The connector is located at the inner surface to electrically connect to the handheld electronic device. The connector includes a plurality of signal transmitting pins. The first detachable connecting structures are arranged in a first array on the outer surface. The first electrical connecting structures are arranged in a second array on the outer surface. The first electrical connecting structures are electrically connected to the signal transmitting pins respectively.

Abstract: Disclosed is an edge-lit backlight module having a rectangular back panel with a reflective microstructure, and a first light portion with an inclined plane or a camber is provided for reflecting lights emitted from a plurality of LEDs and with a relatively smaller normal included angle, and a second light portion is provided for reflecting a light with a slightly greater included angle, and a third light portion is provided for reflecting the light with the greatest included angle to guide lights of different intensities to different paths and project the lights to every position of a front panel, so as to achieve a light extraction efficiency with a uniform distribution of luminous intensity of an LED light source.

Abstract: An acoustoelectric transformation chip for a ribbon microphone includes a diaphragm that has a vibrating region and two fixing regions disposed on two opposite sides of the vibrating region, and a voice coil film formed on the diaphragm. The voice coil film includes two rectangular voice coils, each of which has a plurality of first and second connection segments parallel to a direction of a magnetic field. A plurality of first and second transverse segments are perpendicular to the first and second connection segments and are connected between the first and second connection segments. The second transverse segments of each voice coil are disposed on one of the fixing regions. The first transverse segments of the two voice coils are disposed in the vibrating region.

Abstract: An acoustoelectric transformation chip for a ribbon microphone includes a diaphragm that has a vibrating region and two fixing regions disposed on two opposite sides of the vibrating region, and a voice coil film formed on the diaphragm. The voice coil film includes two rectangular voice coils, each of which has a plurality of first and second connection segments parallel to a direction of a magnetic field. A plurality of first and second transverse segments are perpendicular to the first and second connection segments and are connected between the first and second connection segments. The second transverse segments of each voice coil are disposed on one of the fixing regions. The first transverse segments of the two voice coils are disposed in the vibrating region.