Abstract: A method of obtaining brightness information of a display panel having a plurality of pixels includes steps of: obtaining positioning information indicating positions of the plurality of pixels on a test picture; lighting up the plurality of pixels and capturing the test picture; measuring the plurality of pixels according to the positioning information, to obtain a light intensity distribution of each of the plurality of pixels in the test picture; and calculating the brightness information of each of the plurality of pixels according to the light intensity distribution.

Abstract: The present invention provides a flexible printed circuit board having gold fingers, comprising a base sheet, a metallic layer and a protective sheet. The base sheet has a plurality of voids thereon. The metallic layer is provided on the base sheet, and has at least one plated through hole. The protective sheet is provided on the base sheet and the metallic layer to expose a portion of the metallic layer and the plated through hole. The flexible printed circuit board may electrically be connected to a conductive terminal of a rigid printed circuit board with one gold finger and electrically be connected to a system with another gold finger. The plated through hole has a function of heat conduction and soldering, and the voids of the flexible printed circuit board can provide a space for overflowing solder and heat dissipation.