Abstract: A semiconductor device includes a substrate having a magnetic tunneling junction (MTJ) region and a logic region, a magnetic tunneling junction (MTJ) on the MTJ region and a first metal interconnection on the MTJ. Preferably, a top view of the MTJ includes a circle and a top view of the first metal interconnection includes an ellipse overlapping the circle.

Abstract: A multi-phase motor control method controls a multi-phase motor which includes multiple nodes respectively receiving a corresponding number of driving voltage signals to control a rotation of a rotor. The motor control method includes: sensing a signal phase of a current signal corresponding to at least one node, for example by sensing a zero-crossing point of the current signal; determining a reference phase for the current signal; calculating a phase difference between the signal phase and the reference phase; and controlling a phase switching frequency of the stator according to the phase difference, such that the signal phase is close to or in phase with the reference phase, to thereby obtain an optimum rotation speed of the rotor corresponding to a given driving voltage. The present invention also provides a multi-phase motor control device using the motor control method.

Abstract: A multi-phase motor control method controls a multi-phase motor which includes multiple nodes respectively receiving a corresponding number of driving voltage signals to control a rotation of a rotor. The motor control method includes: sensing a signal phase of a current signal corresponding to at least one node, for example by sensing a zero-crossing point of the current signal; determining a reference phase for the current signal; calculating a phase difference between the signal phase and the reference phase; and controlling a phase switching frequency of the stator according to the phase difference, such that the signal phase is close to or in phase with the reference phase, to thereby obtain an optimum rotation speed of the rotor corresponding to a given driving voltage. The present invention also provides a multi-phase motor control device using the motor control method.

Abstract: A level shifter includes an input stage circuit, a latch circuit and a transient speed-up circuit. The input stage circuit receives an input signal. The latch circuit is coupled to the input stage circuit through a first output terminal and a second output terminal, and determining steady-state levels of the first and the second output terminals according to the input signal. The transient speed-up circuit is coupled to the first and the second output terminals. When the transient speed-up circuit determines the first and the second output terminals are at the same logic level, the transient speed-up circuit accelerates the positive edge transition of the first or the second terminals.

Abstract: A level shifter includes an input stage circuit, a latch circuit and a transient speed-up circuit. The input stage circuit receives an input signal. The latch circuit is coupled to the input stage circuit through a first output terminal and a second output terminal, and determining steady-state levels of the first and the second output terminals according to the input signal. The transient speed-up circuit is coupled to the first and the second output terminals. When the transient speed-up circuit determines the first and the second output terminals are at the same logic level, the transient speed-up circuit accelerates the positive edge transition of the first or the second terminals.

Abstract: A method and apparatus for dynamically adjusting a dead time of a BLDC motor during a phase change detect the winding current of the BLDC motor during the dead time, and terminate the dead time when the winding current is detected to be substantially or close to zero. Thus, the method and apparatus can optimize the dead time and switch the BLDC motor between two phases at a zero-current point, without reducing the maximum rotation speed of the BLDC motor.

Abstract: A zero-crossing detection circuit and a commutation device using the zero-crossing detection circuit are provided. The zero-crossing detection circuit is adapted into a three-phase brushless DC (direct current) motor with first to third coils. One terminal of each of the first to third coils is electrically coupled together with each other. The detection circuit comprises a first selection circuit, a second selection circuit and a comparator. The first selection circuit and the second selection circuit are both electrically coupled to another terminals of the first to third coils, to obtain first to third terminal voltages, and output one of the first to third terminal voltages according to a selection signal. The comparator is configured for comparing an output of the first selection circuit and an output of the second selection circuit, to output a comparing result.

Abstract: A method and apparatus for dynamically adjusting a dead time of a BLDC motor during a phase change detect the winding current of the BLDC motor during the dead time, and terminate the dead time when the winding current is detected to be substantially or close to zero. Thus, the method and apparatus can optimize the dead time and switch the BLDC motor between two phases at a zero-current point, without reducing the maximum rotation speed of the BLDC motor.

Abstract: A zero-crossing detection circuit and a commutation device using the zero-crossing detection circuit are provided. The zero-crossing detection circuit is adapted into a three-phase brushless DC (direct current) motor with first to third coils. One terminal of each of the first to third coils is electrically coupled together with each other. The detection circuit comprises a first selection circuit, a second selection circuit and a comparator. The first selection circuit and the second selection circuit are both electrically coupled to another terminals of the first to third coils, to obtain first to third terminal voltages, and output one of the first to third terminal voltages according to a selection signal. The comparator is configured for comparing an output of the first selection circuit and an output of the second selection circuit, to output a comparing result.

Abstract: A “protective structure of disc packaging” of the invention is composed of an upper lid, a lower lid and a casing that are formed on the top and the bottom sides and the perimeters of a pile of discs, and a heat-shrinkable film covers the protective body and said discs together to retaining the disc quality during the disc packaging and delivery processes. The characteristic of the invention lies in: the upper lid and the lower lid are respectively composed of at least two interlaced disc-shaped plates, which possess wavy buffer portions that are made of corrugated paper or plastic corrugated sheet. When the upper and the lower disc-shaped plates are disposed, the undulating buffer portions of the disc-shaped plates are vertically stacked up, in addition, the sizes of the disc-shaped plates are larger than the sizes of the discs and the casing being shaped as a roll.

Abstract: A display structure. The display structure has a substrate, a panel, a lamp disposed on the panel, a lead wire connected to the lamp, and an intermediate disposed between the lead wire and the substrate. The substrate has a first sliding portion and a first positioning portion. The intermediate has a clamping portion, a second sliding portion and a second positioning portion. When the lead wire is placed in the clamping portion, the intermediate is moved to an engaging position on the substrate by sliding the second sliding portion on the first sliding portion. Thus, the second positioning portion is engaged to the first positioning portion, and the intermediate is elastically deformed so that the lead wire is wedged by the clamping portion.

Abstract: A flat panel display or a backlight module for homogenizing temperature distribution. The backlight module utilizes a heat pipe to carry out the heat from the light source quickly and homogenizes the distribution of temperature of the light source.

Abstract: A mixed-voltage I/O buffer circuit that prevents leakages through a driver stage PMOS transistor is provided. The buffer circuit has a first part that prevents leakage through a parasitic diode of the transistor and a second part that prevents leakage through the transistor when the transistor is turned on by a signal on a bonding pad having a voltage level higher than a power supply voltage of the buffer circuit. The buffer circuit provides biases approximately equal to the high voltage signal to a gate and a substrate terminal of the PMOS transistor when the bonding pad has the high voltage signal thereon, and provides a bias approximately equal to the power supply voltage of the buffer circuit to the gate and substrate of the PMOS transistor when the bonding pad has a low voltage signal thereon.

Abstract: A mixed-voltage I/O buffer circuit that prevents leakages through a driver stage PMOS transistor is provided. The buffer circuit has a first part that prevents leakage through a parasitic diode of the transistor and a second part that prevents leakage through the transistor when the transistor is turned on by a signal on a bonding pad having a voltage level higher than a power supply voltage of the buffer circuit. The buffer circuit provides biases approximately equal to the high voltage signal to a gate and a substrate terminal of the PMOS transistor when the bonding pad has the high voltage signal thereon, and provides a bias approximately equal to the power supply voltage of the buffer circuit to the gate and substrate of the PMOS transistor when the bonding pad has a low voltage signal thereon.

Abstract: A display structure. The display structure has a substrate, a panel, a lamp disposed on the panel, a lead wire connected to the lamp, and an intermediate disposed between the lead wire and the substrate. The substrate has a first sliding portion and a first positioning portion. The intermediate has a clamping portion, a second sliding portion and a second positioning portion. When the lead wire is placed in the clamping portion, the intermediate is moved to an engaging position on the substrate by sliding the second sliding portion on the first sliding portion. Thus, the second positioning portion is engaged to the first positioning portion, and the intermediate is elastically deformed so that the lead wire is wedged by the clamping portion.

Abstract: A display unit comprises a case, a panel, a lamp, an intermediate and a lead wire. The lamp is placed next to the panel, and the lead wire is electrically connected to the lamp to form a conjunctive portion. The conjunctive portion is placed in a mold and integrally covered with the intermediate. When the lead wire is pulled by an abnormal or abrupt force, the majority of the force can be absorbed by the intermediate pressed on the case, and the lead wire can remain fixed to the lamp.

Abstract: A method for producing a display unit, which comprises a case, a panel, a lamp, an intermediate with a positioning portion and a lead wire. The lamp is placed next to the panel, and the lead wire is electrically connected to the lamp to form a conjunctive portion. The conjunctive portion is placed in a mold and integrally covered with the intermediate. The positioning portion of the intermediate is placed next to and abutted against the case while the lamp connected with the lead wires is together disposed on the case. When the lead wire is pulled by an abnormal or abrupt force, the majority of the force can be absorbed by the intermediate pressed on the case, and the lead wire can remain fixed to the lamp.

Abstract: A display unit comprises a case, a panel, a lamp, an intermediate and a lead wire. The lamp is placed next to the panel, and the lead wire is electrically connected to the lamp to form a conjunctive portion. The conjunctive portion is placed in a mold and integrally covered with the intermediate. When the lead wire is pulled by an abnormal or abrupt force, the majority of the force can be absorbed by the intermediate pressed on the case, and the lead wire can remain fixed to the lamp.

Abstract: A display unit (2) comprises a case (20), a panel (21), a lamp (22), an intermediate (23) and a lead wire (24). The lamp (22) is placed next to the panel (21), and the lead wire (24) is electrically connected to the lamp (22) to form a conjunctive portion. The conjunctive portion is placed in a mold (3) and integrally covered with the intermediate (23). When the lead wire (24) is pulled by an abnormal or abrupt force, the majority of the force can be absorbed by the intermediate (23) pressed on the case (20), and the lead wire (24) can remain fixed to the lamp (22).

Abstract: A flat panel display or a backlight module for homogenizing the temperature distribution is disclosed. The backlight module utilizes a heat pipe to carry out the heat from the light source quickly and homogenize the distribution of temperature of the light source. A flat panel display includes such kind of backlight module is also discloed here.