Abstract: A p-GaN high-electron-mobility transistor (HEMT) includes a buffer layer stacked on a substrate, a channel layer stacked on the buffer layer, a supply layer stacked on the channel layer, a doped layer stacked on the supply layer, and a hydrogen barrier layer covering the supply layer and the doped layer. A source and a drain are electrically connected to the channel layer and the supply layer, respectively. A gate is located on the doped layer. The hydrogen barrier layer is doped with fluorine.

Abstract: A memory array for computing-in-memory (CIM) is disclosed. The memory array for CIM includes a bit cell array, at least one word line and at least one bit line. The bit cell array has a plurality of bit cells, wherein each bit cell is operated at an operating voltage. The at least one word line is electrically connected to the bit cell array, wherein the at least one word line is associated with a first parameter. The at least one bit line is electrically connected to the bit cell array, wherein the bit cells extend along a specific direction, each the at least one bit line has an electrical parameter associated therewith, each the bit cell is associated with a second parameter, a first quantity of the plurality of bit cells of the bit cell array extends along the specific direction, and the memory array determines how an expansion associated with at least one of the first parameter and the second parameter is according to the specific direction.

Abstract: Exemplary subpixel structures include a directional light-emitting diode structure characterized by a full-width-half-maximum (FWHM) of emitted light having a divergence angle of less than or about 10°. The subpixel structure further includes a lens positioned a first distance from the light-emitting diode structure, where the lens is shaped to focus the emitted light from the light-emitting diode structure. The subpixel structure still further includes a patterned light absorption barrier positioned a second distance from the lens. The patterned light absorption barrier defines an opening in the barrier, and the focal point of the light focused by the lens is positioned within the opening. The subpixels structures may be incorporated into a pixel structure, and pixel structures may be incorporated into a display that is free of a polarizer layer.

Abstract: The present disclosure is generally related to 3D imaging capable OLED displays. A light field display comprises an array of 3D light field pixels, each of which comprises an array of corrugated OLED pixels, a metasurface layer disposed adjacent to the array of 3D light field pixels, and a plurality of median layers disposed between the metasurface layer and the corrugated OLED pixels. Each of the corrugated OLED pixels comprises primary or non-primary color subpixels, and produces a different view of an image through the median layers to the metasurface to form a 3D image. The corrugated OLED pixels combined with a cavity effect reduce a divergence of emitted light to enable effective beam direction manipulation by the metasurface. The metasurface having a higher refractive index and a smaller filling factor enables the deflection and direction of the emitted light from the corrugated OLED pixels to be well controlled.

Abstract: According to at least one aspect, a communication system is provided. The communication system includes a power amplifier configured to amplify an input signal to generate an amplified output signal and provide the amplified output signal to an antenna, a power supply coupled to the power amplifier and configured to provide power to the power amplifier based on a power supply control signal, and a controller coupled to the power supply. The controller is configured to identify a target transmit power level for transmission of a wireless signal, generate the power supply control signal based on the target transmit power level using information indicative of a relationship between the target transmit power level and a setting of the power supply, generate performance information indicative of a characteristic of the communication system when the wireless signal is transmitted, and update the information indicative of the relationship using the performance information.

Abstract: A signal transmitting apparatus includes: a first converting device arranged to generate an up-converted in-phase signal according to an in-phase digital signal and a first pre-distortion signal; a second converting device arranged to generate an up-converted quadrature signal according to a quadrature digital signal and a second pre-distortion signal; an amplifying device arranged to generate an amplified signal according to the up-converted in-phase signal and the up-converted quadrature signal; and a processing device arranged to generate the first pre-distortion signal according to a first combination signal combined by a cube of the in-phase digital signal and a multiplication of the in-phase digital signal and a square of the quadrature digital signal, and to generate the second pre-distortion signal according to a second combination signal combined by a cube of the quadrature digital signal and a multiplication of the quadrature digital signal and a square of the in-phase digital signal.

Abstract: According to at least one aspect, a communication system is provided. The communication system includes a power amplifier configured to amplify an input signal to generate an amplified output signal and provide the amplified output signal to an antenna, a power supply coupled to the power amplifier and configured to provide power to the power amplifier based on a power supply control signal, and a controller coupled to the power supply. The controller is configured to identify a target transmit power level for transmission of a wireless signal, generate the power supply control signal based on the target transmit power level using information indicative of a relationship between the target transmit power level and a setting of the power supply, generate performance information indicative of a characteristic of the communication system when the wireless signal is transmitted, and update the information indicative of the relationship using the performance information.

Abstract: A signal transmitting apparatus includes: a first converting device arranged to generate an up-converted in-phase signal according to an in-phase digital signal and a first pre-distortion signal; a second converting device arranged to generate an up-converted quadrature signal according to a quadrature digital signal and a second pre-distortion signal; an amplifying device arranged to generate an amplified signal according to the up-converted in-phase signal and the up-converted quadrature signal; and a processing device arranged to generate the first pre-distortion signal according to a first combination signal combined by a cube of the in-phase digital signal and a multiplication of the in-phase digital signal and a square of the quadrature digital signal, and to generate the second pre-distortion signal according to a second combination signal combined by a cube of the quadrature digital signal and a multiplication of the quadrature digital signal and a square of the in-phase digital signal.

Abstract: According to embodiments of the invention, an operational method of a fuel cell is provided. The method includes providing a fuel cell used to provide output power to a load, measuring an initial average voltage of the output power provided by the fuel cell, measuring a first average voltage of the output power after the output power has been provided to the load by the fuel cell for a first time interval, and stopping the fuel cell from providing output power to the load when a voltage difference between the initial average voltage and the first average voltage is more than a first allowable voltage difference.

Abstract: The present invention provides a proton exchange composite membrane with low resistance and preparation thereof. The present invention also provides a novel coupling agent.

Abstract: A fuel cell includes a first mono-sided channel plate, at least one double-sided channel plate, a second mono-sided channel plate, a plurality of membrane electrode assemblies, and a plurality of rigid hydrophilic gaskets. The double-sided channel plate includes a first side channel and a second side channel. The membrane electrode assemblies are respectively disposed between the first mono-sided channel plate and the double-sided channel plate and between the double-sided channel plate and the second mono-sided channel plate. The rigid hydrophilic gaskets are respectively abutted between the first mono-sided channel plate and one of the membrane electrode assemblies, between one of the membrane electrode assemblies and the first side channel of the double-sided channel plate, between the second side channel of the double-sided channel plate and one of the membrane electrode assemblies, and between one of the membrane electrode assemblies and the second mono-sided channel plate.

Abstract: The invention provides a fuel cell module. The fuel cell module includes a membrane electrode assembly, a flow field plate and a current collector. The current collector, disposed between the membrane electrode assembly and the flow field plate, includes a first surface, a second surface and a plurality of openings. The first surface faces the membrane electrode assembly. The second surface is opposite to the first surface and faces the flow field plate. Each of the openings has an inner wall, and an acute angle is formed between the inner wall and the first surface. Additionally, each opening has a first diameter level with the first surface and a second diameter level with the second surface, wherein the first diameter is smaller than the second diameter.

Abstract: A fuel cell is provided, including an integrated cathode/anode flow board, a first anode current collector, a first cathode current collector, a first membrane electrode assembly, a second anode current collector, a second cathode current collector, and a second membrane electrode assembly. The integrated cathode/anode flow board includes first cathode channels for air to flow through, and a plurality of first anode channels for a fuel to flow through. The first cathode channels and the first anode channels are disposed on opposite sides of the integrated cathode/anode flow board. The first anode current collector contacts the first anode channels. The first membrane electrode assembly is sandwiched between the first anode current collector and the first cathode current collector. The second anode current collector contacts the first cathode channels. The second membrane electrode assembly is sandwiched between the second anode current collector and the second cathode current collector.

Abstract: A fuel cell includes a cathode board, a membrane electrode assembly, and an integrated anode flow board. The membrane electrode assembly contacts the cathode board. The integrated anode flow board includes an anode flow board and a current collector combined together. The current collector includes a raised portion abutting the membrane electrode assembly.

Abstract: A membrane electrode module is provided. The membrane electrode module includes a membrane electrode assembly, a first fixing element and a second fixing element. The membrane electrode assembly includes an exchange-membrane, a first electrode and a second electrode. The exchange-membrane includes a first surface and a second surface. The first electrode is disposed on the first surface. The second electrode is disposed on the second surface. The first fixing element contacts the first surface. The second fixing element contacts the second surface, wherein the first fixing element and the second fixing element are joined to the exchange-membrane via heat-pressing to be fixed to the exchange-membrane.

Abstract: The present invention provides a proton exchange composite membrane with low resistance and preparation thereof. The present invention also provides a novel coupling agent.