Patent ID: 9702919
Date: 2017-07-11
CPC Classifications: G01M,G01R,G09G

Claim:
1. A method for manufacturing a display panel including a display unit in which a plurality of pixels, which emit light at a luminance reflecting display gray level signals that are inputted, are arranged in rows and columns, each of the plurality of pixels including a light-emitting element and a drive element that drives the light-emitting element, the method comprising the following, performed on the display panel having a line defect which is at least one of a pixel row and a pixel column that emits light at a luminance not reflecting the display gray level signals: displaying a lighted line and the line defect overlapping each other by displaying the lighted line on the display unit and scanning the display unit with the lighted line in one of a row direction and a column direction, the lighted line being one of a pixel row and a pixel column that emits light when uniform display gray level signals are inputted; reducing one of a bright part range and a dark part range in the line defect by uniformly changing, for all of the plurality of pixels included in the lighted line, one of (i) the uniform display gray level signals to be inputted to the lighted line displayed overlapping with the line defect and (ii) a drive power supply voltage that drives the drive element; and identifying a defective pixel which is an origin of the line defect, from a position, in the display unit, of the one of the bright part range and the dark part range that has been reduced.