Power control system for car computer
First Claim
1. A power control system for car computer, comprising:
- a computer host;
a power switching circuit provided between a power input terminal of the computer host and an external power source;
whereby when a key power is turned on and supplied to the computer host, the computer host outputs a keep-power-on signal;
a power ON/OFF circuit provided between the power switching circuit and the external power source;
the power ON/OFF circuit receiving the keep-power-on signal output by the computer host to thereby connect the external power source to the power input terminal of the computer host to form a close circuit;
a key power detection circuit for detecting from time to time whether the key power is in the ON state, and outputting a detected result to the computer host, so that the computer host may output a shut-down signal when the key power is detected as OFF;
a computer shut-down circuit for receiving the shut-down signal output by the computer host and thereby driving the computer host to execute shut-down procedures; and
a power OFF circuit for sensing an OFF state of the key power, and outputting a control signal to drive the power ON/OFF circuit to disconnect the external power source from the computer host.
1 Assignment
0 Petitions
Accused Products
Abstract
A power control system for car computer includes a power switching circuit located between a power input terminal of a computer host and an external power source, such that the computer host outputs a keep-power-on signal when a key power is supplied thereto; a power ON/OFF circuit receiving the keep-power-on signal to thereby connect the external power source to the computer host; a key power detection circuit for constantly detecting whether the key power is ON, so that the computer host outputs a shut-down signal when the key power is OFF; a computer shut-down circuit for receiving the shut-down signal from the computer host and thereby driving the computer host to execute shut-down procedures; and a power OFF circuit for sensing an OFF state of the key power and outputting a control signal to drive the power ON/OFF circuit to disconnect the external power source from the computer host.
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Citations
6 Claims
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1. A power control system for car computer, comprising:
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a computer host; a power switching circuit provided between a power input terminal of the computer host and an external power source;
whereby when a key power is turned on and supplied to the computer host, the computer host outputs a keep-power-on signal;a power ON/OFF circuit provided between the power switching circuit and the external power source;
the power ON/OFF circuit receiving the keep-power-on signal output by the computer host to thereby connect the external power source to the power input terminal of the computer host to form a close circuit;a key power detection circuit for detecting from time to time whether the key power is in the ON state, and outputting a detected result to the computer host, so that the computer host may output a shut-down signal when the key power is detected as OFF; a computer shut-down circuit for receiving the shut-down signal output by the computer host and thereby driving the computer host to execute shut-down procedures; and a power OFF circuit for sensing an OFF state of the key power, and outputting a control signal to drive the power ON/OFF circuit to disconnect the external power source from the computer host. - View Dependent Claims (2, 3, 4, 5, 6)
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Specification