Abstract: A data driving circuit of reduced power consumption by smoothing large voltage changes includes a shift register circuit, a first latch, a second latch, a level shift circuit, a digital-to-analog (DAC) circuit, and an output circuit. The first latch circuit samples the digital signal, the second latch circuit detects a boundary value of the sampled signal in a specified grayscale range. The boundary value of the sampled signal is compared with the boundary value of a previous sampled signal and if different from the previous boundary value, the second latch outputs a compensation control signal being effective; the output circuit sets the voltage of the data line at a specified voltage before outputting the driving voltage to the data line. A display apparatus is also disclosed.

Abstract: A multi-band antenna includes a bent flat copper antenna forming a radiation surface to provide GSM-850/900/1800/1900 or GPS multi-band applications, and an auxiliary antenna coupled to the radiation surface provide WCDMA-2100/UMTS-2100 multi-band applications. The radiation surface and the auxiliary antenna are coupled to generate the required bandwidth for multiple radiation bands and to optimize the gain of radiation, so that the multi-band antenna can provide a broad range of services.

Abstract: A multi-band antenna includes a bent flat copper antenna forming a radiation surface to provide GSM-850/900/1800/1900 or GPS multi-band applications, and an auxiliary antenna coupled to the radiation surface provide WCDMA-2100/UMTS-2100 multi-band applications. The radiation surface and the auxiliary antenna are coupled to generate the required bandwidth for multiple radiation bands and to optimize the gain of radiation, so that the multi-band antenna can provide a broad range of services.

Abstract: A multi-band antenna of compact size includes a conductor of uniform cross-section folded to form the antenna with a connection portion, a low-frequency first radiation portion, and a high-frequency second radiation portion. The connection portion has a feeding point for signal feeding. The first and second radiation portions connect to two ends of the connection portion. The first radiation portion is folded along two different planes to form three main sections. The second radiation portion is folded along a plane to form two sections. A terminal section of the first radiation portion and a terminal section of the second radiation portion are parallel, such that radiation of these two sections is coupled to enhance radiation characteristics of the antenna. Also, the folded structure helps to achieve compact size of the antenna.

Abstract: A multi-band antenna of compact size includes a conductor of uniform cross-section folded to form the antenna with a connection portion, a low-frequency first radiation portion, and a high-frequency second radiation portion. The connection portion has a feeding point for signal feeding. The first and second radiation portions connect to two ends of the connection portion. The first radiation portion is folded along two different planes to form three main sections. The second radiation portion is folded along a plane to form two sections. A terminal section of the first radiation portion and a terminal section of the second radiation portion are parallel, such that radiation of these two sections is coupled to enhance radiation characteristics of the antenna. Also, the folded structure helps to achieve compact size of the antenna.

Abstract: A mobile communication apparatus includes a printed circuit board (PCB) and a global positioning system (GPS) antenna. The GPS antenna is made of a metal sheet, and vertically inserted into the PCB.

Abstract: A mobile communication apparatus includes a printed circuit board (PCB) and a global positioning system (GPS) antenna. The GPS antenna is made of a metal sheet, and vertically inserted into the PCB.