Pixel array module with self-test function and method thereof

A self-test method for a pixel array module, wherein the pixel array module comprises a pixel array, the pixel array comprises a plurality of pixels, each of the pixels comprises a transistor, and each of the transistors has a first terminal and a second terminal, the self-test method comprising:

• switching the pixel array to a test mode;
• providing a test signal to test at least one of the pixels by using a stable power;
• comparing the test signal with a reference signal to output a comparison result;
• and
• determining whether a number of the pixels in the pixel array that fail the test is greater than a threshold according to the comparison result, and outputting a determination result,
• wherein the test signal is transmitted from the second terminal of the transistor of the pixel to be tested to the first terminal thereof, and a driving signal of each of the transistors is transmitted from the first terminal to the second terminal thereof under a normal mode,
• wherein under the normal mode, the first terminals of the transistors are coupled to the stable power through a plurality of test lines, and the second terminals of the transistors are coupled to a stacking element.