A method for manufacturing an organic EL display panel, the method comprising:
- preparing a substrate;
- forming a plurality of first electrodes over the substrate;
- defining, above the substrate, a plurality of pixel formation regions lining up in a row direction and a column direction to form a matrix, by forming banks over the substrate having the first electrodes formed thereon;
- applying ink containing functional material to each of the pixel formation regions by causing a plurality of nozzles lining up in a straight line to discharge the ink to the pixel formation regions while displacing the nozzles relative to the substrate in a scanning direction along a main surface of the substrate;
- drying the ink having been applied to form functional layers containing the functional material in the pixel formation regions;
- and
- forming one or more layers, at least including a second electrode, at a position covering the pixel formation regions having the functional layers formed therein, wherein:
- in the application of ink, an angle θ between the scanning direction and the row direction is set to more than 0° and less than 90° and each of the nozzles applies the ink across a plurality of rows of the pixel formation regions,
- the pixel formation regions are defined to be located at a fixed pitch Dp in the row direction and at a fixed pitch Dp2 in the column direction,
- in the application of ink, the angle θ is set to satisfy:
- Dp×tan θ≠Dp2, [Math. 1]
- in the application of ink, the angle θ is set to satisfy:
- θ
- =
- sin
- -
- 1
-
- (
- N
- ·
- Dn
- ·
- sin
-
-
- α
- Dp
- )
- [
- Math
- .
-
- 2
- ]
- where Dn denotes a fixed pitch between the nozzles, α denotes an angle between the scanning direction and the straight line, and N is a positive integer,
- the pixel formation regions are defined to each include sub-pixel formation regions corresponding to colors red, green, and blue,
- ink application with the nozzles is performed separately, by using different inks, for sub-pixel formation regions corresponding to the color red, sub-pixel formation regions corresponding to the color green, and sub-pixel formation regions corresponding to the color blue,
- the positive integer N for angle θ defining the scanning direction in application of one of the inks with which luminance is most dependent upon application amount is larger than the positive integer N for angle θ defining the scanning direction in application of each of the other ones of the inks, and
- the applying ink step includes (1) obtaining angle θ for each ink of the respective different inks of the sub-pixel formation region, where each angle θ is set using Math. 1 and Math. 2, and (2) using the obtained angles θ to discharge the respective different inks for the sub-pixel formation regions.