Method for producing organic electroluminescent element having light-emitting pattern

摘要

The problem addressed by the present invention is to enable the providing of a method for producing an organic electroluminescent element having a light-emitting pattern having superior gradation characteristics. The method for producing an organic electroluminescent element having a light-emitting pattern formed by means of light irradiation of an organic electroluminescent element provided with one or more organic functional layers between at least a pair of electrodes is characterized in that an image to pattern comprises a highlight section, a shadow section, and a linear section prepared ahead of time, the amount of light irradiation is altered on the basis of a tone reproduction curve having a soft gradation section that is at the highlight section and shadow section and that has a lower gradient inclination than that of the linear section, and thus a light-emitting pattern is formed having a gradient resulting from a light emission brightness corresponding to the amount of light irradiation.

主权项

1. A method of producing an organic electroluminescent element having a light-emitting pattern, the organic electroluminescent element comprising one or a plurality of organic functional layers between at least a pair of electrodes,
the method comprising a step of: forming the light-emitting pattern by light irradiation to the organic electroluminescent element with changing an amount of the light irradiation based on a tone reproduction curve made in advance which has a highlight portion, a shadow portion and a straight line portion, and the highlight portion and the shadow portion each having a soft gradation section with a smaller slope than a slope of a gradation of the straight line portion to result in forming the light-emitting pattern having a gradation by a light-emitting luminance corresponding to the amount of the light irradiation.