摘要:
A mobile digital signal transceiving device comprises a multimedia interface, a processing unit and a radio frequency (RF) signal transmitter. The multimedia interface reads at least one multimedia data stored in at least one multimedia memory device. The processing unit transfers the multimedia data into a terrestrial broadcast data in a digital video broadcasting-terrestrial (DVB-T) data format, and modulates the terrestrial broadcast data in order to generate an RF signal. The RF signal transmitter transmits the RF signal so that the RF signal may be received by at least one mobile multimedia device.
摘要:
A method for satellite lock-on in an antenna system by channel selection is initiated by receiving a channel selection signal. The channel selection signal is flagged to retrieve satellite parameters corresponding to the selected channel from a pre-stored satellite channel table which provides a correlation among the channels, the bands and the satellite coordinates. Then, according to the retrieved satellite parameters, an antenna control signal and thus a drive signal are generated orderly to drive the antenna to direct at the satellite responsible to the selected channel.
摘要:
An antenna system and a corresponding method for satellite lock-on applied to vehicles automatically lock on at least one satellite in the space by means of a lock-on signal. The technique features on a scan driving signal that initiates a space scan of the antenna system so as to obtain a scan data. According to peak values of the scan data, coordinates of a plurality of satellites in the space are realized and individually recorded. Then, after receiving a lock-on signal, the satellite coordinate of the satellite to be locked is retrieved so as to drive the antenna to point at the satellite to be locked.
摘要:
An antenna system and a corresponding method for satellite lock-on applied to vehicles automatically lock on at least one satellite in the space by means of a lock-on signal. The technique features on a scan driving signal that initiates a space scan of the antenna system so as to obtain a scan data. According to peak values of the scan data, coordinates of a plurality of satellites in the space are realized and individually recorded. Then, after receiving a lock-on signal, the satellite coordinate of the satellite to be locked is retrieved so as to drive the antenna to point at the satellite to be locked.
摘要:
A brushless permanent magnet motor with unequal-width slots and its manufacturing method completes a design of a regular motor with equal-width slots, employs a single-layer centralized winding, increasing the width equally on left and right sides of a first type of teeth wound with a coil until a width Wt3 of a tooth tip equals to a width Wp of a magnetic pole, such that the stator slot opening shifts towards a second type of teeth with no coil, increasing a width of a first type of teeth with a coil equally on left and right sides until a coil pitch equals to a width Wp of a magnetic pole or a motor angle equals to 180°, and decreasing a width Wt2 of a second type of teeth with no coil equally on both left and right sides until a slot area Sa2 is greater than the original slot area Sa1 of a regular motor with equal-width slots to improve the motor efficiency and reliability for a variable speed operation.
摘要:
A Low Noise Block downconverter (LNB) with high isolation, and more particularly, to a low-noise-block downconverter design for horizontal wave and vertical wave of a linear polarization; wherein, a horizontal probe and a vertical probe are directly set on a printed circuit board to receive the aforesaid waves; a waveguide chamber of the horizontal probe is divided into two chambers, a front chamber and a back chamber; a waveguide chamber of the vertical probe is transversely extended from a side waveguide, and the waveguide chamber of the vertical probe is also divided into two chambers; thereby the horizontal and vertical probe respectively receives the waves when facing to the rear side of the waveguide chambers for separating the horizontal and vertical wave and reducing the coupling of each other; thus, increasing the isolation and preventing the mutual interference of the horizontal and vertical wave.
摘要:
A headrest-mount display mounting structure is disclosed to include a rectangular open base frame for fastening to the headrest of a vehicle seat, the base frame having two pivot holders at two sides, a front shell adapted to accommodate a display, the front shell having two pivots respectively supported in the pivot holders of the base frame, two locating members respectively fixedly fastened to the pivot holders to hold the pivots of the front shell in place, and a front cover fastened to the base frame and covered over the front shell.