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 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: 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 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: 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 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: 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: 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 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 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 touch module includes a substrate and an electrode layer. The electrode layer is formed on the substrate. The electrode layer includes at least one first electrode row arranged along a first direction. The first electrode row includes a plurality of first electrode units arranged along a second direction. The densities of the first electrode units change according to a first predetermined ratio.

Abstract: A device integrating capacitive touch and resistive touch includes a first sensing layer, a second sensing layer, and a processing unit. The first sensing layer includes a plurality of sensing units, wherein the plurality of sensing units are insulated from each other. The second sensing layer installed below the first sensing layer includes a plurality of electrodes. The processing unit is used for charging the first sensing layer, detecting capacitance variation of the plurality of sensing units, and determining a position of at least one first touch point according to the capacitance variation of the plurality of sensing units in a capacitive touch mode; and charging the first sensing layer, detecting resistance variation of the plurality of electrodes, and determining a position of at least one second touch point according to the resistive variation of the plurality of electrodes in a resistive touch mode.

Abstract: A smart keyboard for establishing bidirectional communication between a television and a portable device includes a wireless module, a socket, a touch panel, and a processor. The wireless module is used for establishing a wireless connection with the television. The processor is used for controlling operation of the television through the wireless connection or controlling the television to display contents displayed on the portable device through the wireless connection when the portable device is fixed on the socket according to a first command generated by the touch panel.

Abstract: A touch keyboard includes a main touch keyboard and an auxiliary touch keyboard. The main touch keyboard includes a main touch sensing element and a main processor. The main touch sensing element is provided for touching to generate a user touching signal. The main processor electrically connected with the main touch sensing element and is provided for receiving user touching signal and switching the keyboard type which is indicated by the main touch sensing element. The auxiliary touch keyboard can detachable connected to the main touch keyboard. The auxiliary touch keyboard includes an auxiliary touch sensing element that is electrically connected with and is controlled by the main processor. The detachable main touch keyboard and the auxiliary touch keyboard are switched to other keyboard type by the main processor and the switched keyboard is provided for variety application to achieve the multifunctional intelligent keyboard.