Image display device
An image display device capable of preventing erroneous activation of the theft prevention function is provided. The image display device includes a theft prevention unit having an alarm function for preventing theft of the image display device, and a control circuit for controlling the theft prevention unit. The control circuit invalidates the alarm function of the theft prevention unit before the image display device is shipped out of a factory.
1. An image display device for production in a factory and for use with a power supply, the image display device comprising:
a theft prevention unit having an alarm function for preventing theft of the image display device; and
a control circuit for controlling the theft prevention unit, in which the control circuit responsive to a remote control signal invalidates the alarm function of the theft prevention unit before the image display device is shipped out of the factory, and activates the alarm function when the power supply starts supplying power.
2. The image display device according to claim 1 , wherein the theft prevention unit includes:
a detector for detecting theft of the image display device and generating a detection result;
a notifier for providing notification of theft of the image display device based on the detection result of the detector; and
a further control circuit for controlling the detector and the notifier, wherein the further control circuit is controlled by the control circuit.
3. The image display device according to claim 2 , wherein:
the control circuit generates a control signal for controlling the further control circuit; and
the further control circuit deactivates the detector and the notifier based on the control signal generated by the control circuit before the image display device is shipped out of the factory.
4. The image display device according to claim 3 , wherein the further control circuit activates the detector and the notifier based on the control signal after the image display device is shipped out of the factory when the power supply starts supplying power.
5. The image display device according to claim 4 , wherein:
the image display device is connected to an AC power supply for supplying power to the image display device; and
the further control circuit activates the detector and the notifier when the AC power supply starts supplying power.
6. The image display device according to claim 2 , wherein the detector is a vibration sensor.
7. The image display device according to claim 2 , wherein the notifier includes at least one of a voice output device and a display output device.
8. The image display device according to claim 2 , wherein the theft prevention unit further includes a storage circuit for storing a functional parameter for the detector and a functional parameter for the notifier.
9. The image display device according to claim 1 , wherein:
the image display device is connected to an AC power supply for supplying power to the image display device; and
the theft prevention unit further includes a battery capable of supplying power to the theft prevention unit, the battery supplying power to the theft prevention unit when the AC power supply stops supplying power, and the further control circuit sets the theft prevention unit to a low power consumption mode when the battery supplies power to the theft prevention unit.
10. The image display device according to claim 9 , wherein the control circuit validates the alarm function of the theft prevention unit when the AC power supply starts supplying power after the image display device is shipped out of the factory.