Patent ID: 8400177

Claim:
A testing device for testing a display panel, the display panel including a first circuit board, multiple pins being arranged on the first circuit board, the testing device comprising: a second circuit board comprising: a main body having a first surface and a second surface; a plurality of test pads, corresponding to respective pins of the first circuit board, arranged on the first surface of the main body; a plurality of testing circuits, corresponding to respective test pads, formed on the second surface of the main body; a plurality of conducting elements disposed through the main body for electrically connecting the testing circuits and the test pads; and at least one first positioning hole; a fixing member for fixing the second circuit board, comprising: a flat slab having a confined recess with a shape fitted with the first circuit board and the second circuit board in a stacked form for accommodating and positioning the second circuit board and the first circuit board, so that the first circuit board and the second circuit board in the stacked form are held by the recess; and at least one first positioning post, which is protruded from a bottom surface of the recess of the flat slab and corresponds to the at least one first positioning hole of the second circuit board, wherein the first positioning post and the first positioning hole are engaged with each other, so that the second circuit board is fixed in the recess; and a pressing element disposed on and corresponding to the test pads thereby facilitating close contact between the first circuit board and the second circuit board; wherein when the first circuit board is stacked on the second circuit board, the testing circuits are electrically connected to respective pins through respective conducting elements and respective test pads.