| 摘要 |
There is disclosed a control unit for the electrical power supply to a CRT monitor used with a personal computer. The unit has electrical power input and output connections, at least one user input for a computer peripheral such as a keyboard or a mouse and outputs to the central computer unit. The power control unit has an electrical switching circuit which, preferably, is a zero-crossing switching circuit to ensure that the switching of the power supply to the computer monitor does not damage internal parts such as the cathode ray tube of the monitor. The electrical switching circuit is controlled by timing, latching and user activity detection circuits in the power control unit.
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