Patent ID: 7852065

Claim:
A testing apparatus for testing a 4-wires resistive touch panel, the testing apparatus being connected to a first electronic unit and a second electronic unit of the 4-wires resistive touch panel, the first electronic unit having a first input terminal and a first output terminal, and the second electronic unit having a second input terminal and a second output terminal, the first electronic unit and the second electronic unit being overlapped but not contacted with each other, the testing apparatus comprising: a voltage control unit, connected to the first input terminal, the second input terminal and the second output terminal, for generating a first voltage level, which is a low voltage level, and a second voltage level, which is a high voltage level; a signal control unit, connected to the first input terminal, for generating a testing signal; a connecting unit, connected to the first output terminal and the second input terminal, for switching the connection or disconnection therebetween; and a determining unit, connected to the first output terminal, the second input terminal and the second output terminal; wherein, in a first test condition for testing the first electronic unit, the voltage control unit outputs the second voltage level to the both the second input terminal and the second output terminal, the signal control unit outputs the testing signal, and the connecting unit is switched to the disconnection so that the determining unit receives the signal from the first output terminal; wherein, in a second test condition for testing the second electronic unit, the voltage control unit does not output any voltage level, the signal control unit outputs the testing signal, and the connecting unit is switched to a connection so that the determining unit receives the signal from the first output terminal; wherein, in a third test condition for testing both the first electronic unit and the second electronic unit, the voltage control unit outputs the first voltage level to the first input terminal and outputs the second voltage level to the second output terminal, the signal control unit does not output the testing signal, and the connecting unit is switched to the connection so that the determining unit receives the signal from the first output terminal.