Device and method for testing display panel
A testing device is provided for testing a display panel including a first circuit board. The testing device includes a second circuit board and a pressing element. The second circuit board includes a main body, multiple test pads, multiple testing circuits and multiple conducting elements. The test pads are arranged on a first surface of the main body and corresponding to respective pins of the first circuit board. The testing circuits are formed on the second surface of the main body and corresponding to respective test pads. The first circuit board is stacked on the second circuit board. The testing circuits are electrically with respective pins through respective conducting elements and respective test pads. The pressing element presses a stacking region between the first circuit board and the second circuit board, thereby facilitating close contact between the first circuit board and the second circuit board.
1. 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.
2. The testing device according to claim 1 , wherein the fixing member further comprises a positioning plate for further fixing the second circuit board in the recess, and the pins of the first circuit board are in close contact with respective test pads of the second circuit board when the first circuit board is contacted with the positioning plate.
3. The testing device according to claim 1 , wherein the fixing member further comprises:
two second positioning posts protruded from a bottom surface of the recess and arranged at two opposite sides of the test pads of the second circuit board, and the second positioning posts are arranged at two opposite sides of the first circuit board after the first circuit board is placed in the recess.
4. The testing device according to claim 1 , wherein the test pads are ring-shaped.
5. The testing device according to claim 4 , wherein the diameter of the test pad is smaller than the width of the pin.
6. A display panel testing method, comprising steps of:
providing a display panel including a first circuit board, wherein the first circuit board includes a plurality of pins;
providing a testing device including a second circuit board, wherein the second circuit board has a plurality of test pads corresponding to the pins of the first circuit board;
providing a fixing member including a flat slab with a confined recess with a specific shape for placing and positioning the second circuit board;
providing a positioning plate for further fixing the second circuit board in the recess, wherein the test pads of the second circuit board are unsheltered by the positioning plate; and
stacking the first circuit board on the second circuit board against the positioning plate such that the pins of the first circuit board are in close contact with and electrically connected to respective test pads of the second circuit board; and
providing a pressing element on a stacking region of the first circuit board and the second circuit board, thereby facilitating close contact between the first circuit board and the second circuit board;
wherein the fixing member includes at least one first positioning post and the second circuit board includes at least one first positioning hole, wherein the step of placing the second circuit board in the recess comprises a sub-step of allowing the first positioning post and the first positioning hole to be engaged with each other.
7. The display panel testing method according to claim 6 , wherein the fixing member includes a plurality of second positioning posts, wherein the step of placing the first circuit board on the second circuit board comprises a sub-step of positioning the first circuit board between the second positioning posts.
8. 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 recess with a shape fitted with the first circuit board and the second circuit board in a stacked form for accommodating the second circuit board and the first circuit board, so that the first circuit board and the second circuit board in the stacked form is held by the recess;
at least one first positioning post protruding from a bottom surface of the recess of the flat slab and corresponding to the at least one first positioning hole in a manner that the first positioning post and the first positioning hole are engaged with each other so as to fix the second circuit board 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.