Patent ID: 8176548
Filing Date: 2012-05-08
Classification: G06F,H04L

Abstract:
1. A protection system for a display apparatus, comprising: an electronic key, having a first memory for storing a plurality of first passwords; a connector, disposed in the display apparatus and used for connecting the electronic key, wherein the connector is an original connector of the display apparatus, and the connector comprises a surface selected from a group consisting of a VGA interface, an RS232 interface, a DVI interface, a USB interface, and an HDMI interface; a protection module, disposed in the display apparatus and having a second memory and a microprocessor, the second memory being used for storing a plurality of first identification codes, the plurality of first identification codes corresponding to the plurality of first passwords; and a signal switch, coupled between the connector and the protection module, the signal switch being used for switching between an electronic signal of the display apparatus and an electronic signal of the protection system; wherein when the electronic key is connected to the connector of the display apparatus, the signal switch receives the electronic signal of the electronic key through the connector and sends the electronic signal of the electronic key to the microprocessor and makes the protection module enable, such that the microprocessor of the protection module separately compares the plurality of first passwords and the plurality of first identification codes, if one of the plurality of first passwords tallies with one of the plurality of first identification codes, the display apparatus is allowed to be turned on and the microprocessor of the protection module separately updates the plurality of first passwords and the plurality of first identification codes, and the plurality of first passwords that have been updated correspond to the plurality of first identification codes that have been updated, and if none of the plurality of first passwords tallies with any of the plurality of first identification codes, the display apparatus is prohibited from being turned on, wherein when the display apparatus is allowed to be turned on under a condition of that one of the plurality of first passwords tallies with one of the plurality of first identification codes, and the electronic key is removed from the connector of the display apparatus, the signal switch makes the protection module disable, such that the signal switch receives the electronic signal of the display apparatus through the connector and sends the electronic signal of the display apparatus to the microprocessor, and the microprocessor then processes the electronic signal of the display apparatus so as to make the display apparatus display images.