Via Technologies, Inc.

Tian Holdings, LLC

Ronald Chen

Ronnie Lai

An operating current modifying device is provided for a power generating element. The power generating element generates an output power when the operating current is larger than a threshold current in the power generating element. A functional relationship is between the threshold current and the temperature of the electrical device. The operating current modifying device includes a threshold current modifying module, a power modifying module, a current compensating module, and a power control module. The threshold current modifying module receives a temperature signal from the power generating element to output a threshold current modifying signal according to the temperature signal and the functional relationship. The power modifying module receives a power feedback signal from the power generating element and a target power signal to output an operating current modifying signal. The current compensating module receives the threshold current modifying signal and the operating current modifying signal to distribute the operating current modifying signal into an operating current compensating signal and a threshold current compensating signal. The power control module receives the operating current compensating signal and the threshold current compensating signal to adjust the operating current.

Operating current modifying device and method

A power control device of multi base powers is provided for an optical read/write module of an optical disk drive. The optical read/write module generates a power feedback signal and a temperature signal. The power control device includes a base power selecting module, a current compensating module, a current computing module and a current integrating module. The base power selecting module selects one of a first base power signal and a second base power signal to output a base power signal. The current compensating module generates an operating current compensating signal and a threshold compensating signal according to the power feedback signal, the temperature signal, the base power signal and a function relationship between the temperature signal and the threshold current of the optical read/write module. The current computing module receives the operating current compensating signal to compute a first operating current signal, a second operating current signal and a third operating current signal based on the operating current compensating signal according to the base power signal and a reference power signal. The current integrating module receives the threshold current compensating signal, the first operating current signal, the second operating current signal and the third operating current signal to generate a power control signal to drive the optical read/write module.

Power control device and method of multi base powers for optical disk drive

A power control device of single base power is provided for an optical read/write module of an optical disk drive. The optical read/write module generates a power feedback signal and a temperature signal. The power control device includes a current compensating module, a current computing module and a current integrating module. The current compensating module generates an operating current compensating signal and a threshold compensating signal according to the power feedback signal, the temperature signal, a base power signal and a function relationship between the temperature signal and the threshold current of the optical read/write module. The current computing module receives the operating current compensating signal to compute a first operating current signal and a second operating current signal based on the operating current compensating signal according to the base power signal and a reference power signal. The current integrating module receives the threshold current compensating signal, the first operating current signal and the second operating current signal to generate a power control signal to drive the optical read/write module.

Power control device and method of single base power for optical disk drive

A power control method is provided for an optical disk drive. The optical disk drive has an optical read/write module for accessing an optical storage media. The power control method includes the following steps: measuring the temperature of the optical read/write module; predicting a threshold current of the optical read/write module according to the temperature; determine the accessing mode of the optical storage media; measuring the output power of the optical read/write module; computing a first current required for the optical read/write module according to the output power of the optical read/write module and a base power in the accessing mode; compensating the computed first current according to the predicted threshold current; and driving the optical read/write module according to the first current.

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Taipei, Taiwan

Ronald Chen