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US 11,455,263 B2Granted
Fan communication method and related fan system
AssigneeWiwynn Corporation
InventorsYi-Zhe Wu, Chih-Yuan Lin, Chih-Yuan Hung
Life of this patent
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Abstract
A communication method for a fan includes transmitting an initial signal with a specific duty cycle pattern to the fan; entering a communication mode after the fan receives the initial signal; reading information of the fan by a firmware of the fan; and transforming the information of the fan into a fake tachometer (TACH) signal and transmitting the fake TACH signal to a controller via a TACH signal line under the communication mode.
Claims8
A communication method for a fan, comprising:
- transmitting an initial signal with a specific duty cycle pattern to the fan;
- entering a communication mode after the fan receives the initial signal;
- reading information of the fan by a firmware of the fan;
- and
- transforming the information of the fan into a fake tachometer (TACH) signal and transmitting the fake TACH signal to a controller via a TACH signal line under the communication mode;
- wherein the fan is configured to enter the communication mode from a normal mode after receiving the initial signal, and the fan is configured to transmit revolution speed information of the fan in the normal mode;
- wherein the initial signal is generated by the controller and the controller transmits the initial signal to the fan via a pulse width modulation (PWM) signal line;
- wherein when the controller does not support transmitting the initial signal to the fan, or the controller does not support receiving the fake TACH signal from the fan, a fan driving circuit is configured to transmit the initial signal to the fan, and to receive the fake TACH signal from the fan, in order to transmit the fake TACH signal to the controller via an Inter-Integrated Circuit (I2C) bus.
5 more elements
A fan system, comprising:
- a controller, configured to transmit an initial signal with a specific duty cycle pattern;
- and
- a fan, configured to receive the initial signal, enter a communication mode after receiving the initial signal to read information of the fan, and transform the information of the fan into a fake tachometer (TACH) signal, such that the fake TACH signal is transmitted to a controller via a TACH signal line under the communication mode;
- a fan driving circuit, coupled to the controller and the fan, configured to transmit the initial signal to the fan, and to receive the fake TACH signal from the fan, in order to transmit the fake TACH signal to the controller via an Inter-Integrated Circuit (I2C) bus when the controller does not support transmitting the initial signal to the fan, or the controller does not support receiving the fake TACH signal from the fan;
- wherein the fan is configured to enter the communication mode from a normal mode after receiving the initial signal, and the fan is configured to transmit revolution speed information of the fan in the normal mode;
- wherein the controller is configured to transmit the initial signal to the fan via a pulse width modulation (PWM) signal line.
3 more elements
Dependencies are inferred from the claim text.