Abstract: An active-matrix organic light-emitting diode pixel circuit and a driving method for the same are provided to eliminate adverse effects of variation in transistor threshold voltage. However, owing to internal parasitic parameters of transistors, compensation for variation in a threshold voltage is not necessarily fully achieved. Therefore, mura otherwise arising from variation in a threshold voltage and degradation of organic light-emitting diodes is eliminated at an emission stage by an external processor's sensing an anode voltage of the organic light-emitting diodes, calculating an offset value related thereto, and adjusting an originally output data voltage with the offset value.

Abstract: A helmet can include a helmet body and a control system coupled to the helmet body. The helmet body can include a main body, a visor coupled to the main body, and two earphones coupled to opposite sides of the main body. Each of the earphones can include a headset configured to wirelessly couple to an external communication device. The control system can include a control module coupled to the main body, an input module coupled to the control module, and a display module coupled to the control module. The display module can include an incoming display coupled to the visor. The control module can be configured to couple to the external communication device.

Abstract: A display device includes a drive board, a liquid crystal display (LCD) panel, a multi-media board, a wireless high-definition (WiHD) receiver, and a WiHD transmitter. The LCD panel, the drive board, and the WiHD receiver are housed in a first enclosure. The multi-media board and the WiHD transmitter are housed in a second enclosure. The first enclosure and the second enclosure are separately spaced from each other. The WiHD transmitter and the WiHD receiver establishes a wireless communication channel. The multi-media board receives video data from a video source, and transmits the video data to the drive board via the wireless communication channel. The drive board generates drive signals based on the video data, and transmits the drive signals to the LCD panel. The LCD panel presents video images according to the drive signals.

Abstract: A display device includes a first enclosure, a second enclosure, a drive board, and a liquid crystal display (LCD) panel. The drive board generates drive signals and transmits the drive signals to the LCD panel. The LCD panel presents video images according to the drive signals. The first enclosure and the second enclosure are separately spaced from each other. The LCD panel is housed in the first enclosure. The drive board is housed in the second enclosure.

Abstract: An electric tool includes a power supply, a controlling apparatus and a two-way motor. The motor includes first and second leads. The controlling apparatus includes a first conductive element connected with the anode of the power supply, a second conductive element connected with the cathode of the power supply, a switching device comprising a carrier for carrying and switching the conductive elements between a neutral position, a first operative position and a second operative position. In the neutral position, the conductive elements do not contact the leads of the motor. In the first operative position, the first end of the first conductive element contacts the first lead of the motor and the second end of the second conductive element contacts the second lead of the motor. In the second operative position, the second end of the first conductive element contacts the second lead of the motor and the first end of the second conductive element contacts the first lead of the motor.