Abstract: The present disclosure relates to a fan system and a fan driving method. The fan system includes a first fan and a second fan, which are used to operate according to a first driving signal and a second driving signal, respectively, and to generate a first rotating speed signal and a second rotating speed signal. The first rotating signal has a first phase, and the second rotating signal has a second phase. The second fan is electrically connected to the first fan to receive the first rotating speed signal, and obtain a detected phase difference between the first phase and the second phase. The second fan is further configured to selectively increase or decrease the duty cycle of the second driving signal according to the detected phase difference, so that the second phase is adjusted to maintain a preset phase difference with the first phase.

Abstract: A motor system includes a driving circuit, a motor device and a control circuit. The driving circuit outputs a driving current according to multiple control signals. The motor device drives a rotor unit to rotate according to the driving current, and includes a first sensor and a second sensor to sense the polarity of the rotor unit in different directions to generate polarity data. The control circuit receives the polarity data. When the polarity data is in a first state, the control circuit records a first maintenance time. When the polarity data changes from the first state to a second state, and a second maintenance time for the second state corresponds to the first maintenance time, the control circuit sets the polarity data to a third state, until the polarity data is changed from the third state to a fourth state.

Abstract: The present disclosure relates to a motor driving method, which includes the following steps: detecting a detected voltage value between a first switch and a second switch in a driving circuit, wherein the driving circuit is configured to control the first switch and the second switch according to a switching frequency to provide a driving current to a motor device; determining a driving current according to the detected voltage value; when the driving current is less than a predetermined value, the first switch and the second switch are turned off for a detection period, wherein the length of the detection period is a fixed value; during the detection period, detecting a back electromotive force to calculate a zero crossing time of the back electromotive force; and adjusting the switching frequency according to the zero crossing time.

Abstract: A current state determination method is configured to determine a state of current passing through a coil of a motor and includes: at a first time point when a high side transistor and a low side transistor are switched to a cut-off state, measuring a voltage of a node where the high side transistor, the low side transistor and the coil are coupled, so as to output a first voltage; at a second time point when the high side transistor and the low side transistor are maintained in the cut-off state, measuring the voltage of the node, so as to output a second voltage; comparing the first voltage and the second voltage to obtain a comparison result; and determining the state of the current according to the comparison result. The present disclosure also provides a current state determination circuit for performing the current state determination method.

Abstract: The present disclosure relates to a fan system and a fan driving method. The fan driving method includes the following steps: transmitting a first control signal to a first fan and a second fan by a processor; determining whether a first control frequency of the first control signal is within a first frequency band and a second frequency band, wherein the first frequency band and the second frequency band are different; when the first control frequency is within the first frequency band, adjusting a first rotation speed of the first fan according to the first control signal; and when the first control frequency is within the second frequency band, adjusting a second rotation speed of the second fan according to the first control signal.

Abstract: A current determination circuit is configured to determine a state of current passing through a coil of a motor and includes a high side circuit, a low side circuit and a processor. The high side circuit is configured to output a first determination signal according to a first voltage between two ends of a first body diode of a high side transistor and the voltage level of a first control signal. The low side circuit is configured to output a second determination signal according to a second voltage between two ends of a second body diode of a low side transistor and the voltage level of a second control signal. The processor is configured to receive the first determination signal and the second determination signal and determine the state of current according to the voltage level of the first determination signal and the voltage level of the second determination signal.

Abstract: The invention provides a system and method for detecting clock frequency offset of fan chip. The system comprises a fan chip and a control unit. A target pulse width is defined in the fan chip and the control unit. When the control unit executes a detection process of clock frequency offset for the fan chip, it will generate a specific pattern pulse signal and send the specific pattern pulse signal to the fan chip. The fan chip enters a detection mode of clock frequency offset according to the specific pattern pulse signal, generates a response signal including an actual target pulse width based on referring to the defined target pulse width, and send the response signal to the control unit. The control unit compares a difference between the actual target pulse width and the defined target pulse width to detect a clock frequency offset value of the fan chip.

Abstract: The invention provides a fan control system, which comprises a fan, a control unit, and a fan chip. The fan chip comprises a command table. A first specific pulse pattern represented as a first form of code, and a second specific pulse pattern represented as a second form of code are defined in the fan chip. The command table records at least one control command. Each control command is corresponding to a code string, respectively. When the fan chip receives a series of pulse signals from the control unit, it will determine that the code string is represented by the pulse signals, and inquire the corresponding control command from the command table according to the determinated code string so as to set up at least one operation parameter of the fan chip or control the fan to perform a corresponding operation according to the inquired control command.

Abstract: The invention provides a detection system and method of signal transmission delay for fan chip. The detection system comprises a circuit board, a fan chip and a control unit. The control unit generates a first pulse signal having a specific pulse pattern, and send the first pulse signal to the fan chip. When the fan chip is operating in a detection mode of signal transmission delay according to the first pulse signal, the fan chip copies the specific pulse pattern of the first pulse signal to generate a second pulse signal having the specific pulse pattern, and send the second pulse signal to the control unit. The control unit calculates a time difference between a time that sends the first pulse signal and a time that receives the second pulse signal, so as to obtain a delay time of signal transmission between the control unit and the fan chip.

Abstract: A capacitive touch keyboard includes an insulating substrate that defines a plurality of press key zones, and a first and a second conductive layers, both disposed on the insulating substrate. Each conductive layer includes a plurality of electrode lines arranged in two different directions. Each electrode line includes a plurality of electrode units connected in series. Each electrode unit is disposed at a position corresponding to a respective one of the press key zones. For each of the press key zones, the electrode units of the first the second conductive layers that are disposed therein are adjacent to each other and cooperate to form a touch sensing structure.

Abstract: A touch-control module for recognizing gesture inputs by a position sensitive device to an electronic device is disclosed. The touch-control module includes an input connected to the position sensitive device for receiving at least one sensing signal generated by the position sensitive device when one or more objects touch a surface thereof; a touch state unit for detecting the sensing signal and determining a touch state of the object(s), such as approaching to or lifting off the position sensitive device; a position and multi-gesture processing unit for analyzing the sensing signal to determine a touch position of the object(s) on the position sensitive device, and tracking the touch state and touch position to determine a corresponding motion factor; and an output connected to the electronic device for outputting the touch state and touch position as well as information corresponding to a motion factor whenever the motion factor is determined.

Abstract: A method for analyzing a two-dimensional track to generate at least one non-linear index and a touch control module using the same are provided.

Abstract: A portable electronic device includes: a main module disposed in a main housing; a keyboard mounted on a mounting surface of the main housing and connected electrically to the main module; and a touch input unit mounted to the main housing and connected electrically to the main module. The touch input unit has first, second and third operating areas spaced apart from each other and exposed from the mounting surface of the main housing. The touch input unit generates an input signal corresponding to one touch point on any one of the first, second and third operating areas, and outputs the input signal to the main module such that the main module performs an operation corresponding to the input signal.

Abstract: A digital signal processor includes an instruction analysis unit, a digital signal processor (DSP) core and a memory unit. The instruction analysis unit receives an instruction and determines the required bit width M for the data process corresponding to the instruction. The DSP core performs the M-bit data process based on the bit width M determined by the instruction analysis unit, and the memory unit stores multiple data and performs the M-bit access based on the bit width M determined by the instruction analysis unit thereby allowing the DSP core to access, and at least one available space in the memory unit will be adjusted such that only the access space having the bit width M for the operation corresponding to the instruction will be open in each access, thereby effectively achieving the effect of power-saving.

Abstract: An electronic device includes a touch panel and a control module. On the display panel, m columns of sensing capacitors are disposed along a first direction and n rows of sensing capacitors are disposed along a second direction. The control module includes M column output channels, N row output channels, M column scan lines and N row scan lines. Each column scan line includes a first end coupled to a corresponding column output channel and a second end spreading into A sub scan lines which are coupled to A adjacent columns of sensing capacitors among the m columns of sensing capacitors, respectively. Each row scan line includes a first end coupled to a corresponding row output channel and a second end spreading into B sub scan lines which are coupled to B adjacent rows of sensing capacitors among the n rows of sensing capacitors, respectively.

Abstract: A method for optimizing energy consumption of an application program for a DSP includes a program code generating unit is adapted to edit and generate a program code, a program compiling unit is adapted to receive the program code, and according to the program code and the instructional wise energy consumption database generate a plurality of assembly codes, and a DSP simulator adapted to receive the assembly codes and at least one stimulus to simulate the total and the amount of energy every instruction of the assembly codes consumes and transmit the results to the program compiling unit. The program compiling unit modifies the compiling scheme to recompile the program code and transmits the new assembly codes to the DSP simulator, until the simulation results reach or are lower than a predetermined energy consumption value.

Abstract: A touch pad including a printed circuit board, a plurality of column-conductor groups and a plurality of row-column groups. The printed circuit board is formed with an upper surface and a lower surface. The column-conductor groups include a plurality of first column-conductors and a plurality of second column-conductors. The row-conductor groups include a plurality of first row-conductors and a plurality of second row-conductors. The first column-conductors and the first row-conductors are provided on the upper surface. The second column-conductors and the second row-conductors are respectively provided on one and the other of the upper surface and the lower surface, and electrically connected to each other through column-vias and row-vias. Whereby the structure, the existing material and process can be still be used, and the problem of crossed wires can be avoided, also the yield of products can be increased with less waste of materials.

Abstract: A capacitive touch keyboard includes an insulating substrate that defines a plurality of press key zones, and a first and a second conductive layers, both disposed on the insulating substrate. Each conductive layer includes a plurality of electrode lines arranged in two different directions. Each electrode line includes a plurality of electrode units connected in series. Each electrode unit is disposed at a position corresponding to a respective one of the press key zones. For each of the press key zones, the electrode units of the first the second conductive layers that are disposed therein are adjacent to each other and cooperate to form a touch sensing structure.

Abstract: A touch keyboard includes a touch panel that defines a plurality of touch input zones and that has opposite first and second surfaces, and an input member disposed on the first surface of the touch panel. The input member includes a body and a plurality of resilient key units disposed on the body. The resilient key units are separate from each other and protrude respectively from the body at positions corresponding to the touch input zones and are able to contact with the first surface of the touch panel during deformation thereof, respectively.

Abstract: A touch device includes a touch pad and a base having an accommodating region and at least one first conductor. The touch pad is received in the accommodating region and subjected to a force to generate a changeable position relative to the base. The touch pad has a touch surface consisting of a plurality of capacitive sensors and at least one second conductor connected with at least one of the capacitive sensors. The second conductor is electrically connected with the first conductor. Capacitances measured from the capacitive sensors are substantially different between the touch surface touched with a conductive object and the second conductor connected with the first conductor, which is connected to a fixed voltage, current or a ground. Therefore, a control unit connected to the capacitive sensors can generate different control signals from the connecting state between the first conductor and the second conductor.