Patent ID: 9640597
Date: 2017-05-02
CPC Classifications: H01L

Claim:
1. An organic light-emitting diode (OLED) substrate, comprising: a base substrate; a plurality of light-emitting sub-pixels disposed on the base substrate; and a pixel partition wall disposed on the base substrate, wherein: each of the light-emitting sub-pixels includes an anode disposed over the base substrate, a hole injection layer (HIL) disposed over the anode, a hole transport layer (HTL) disposed over the HIL, and an organic light-emitting layer disposed over the HTL; the pixel partition wall includes film layers comprising lyophilic film layers and lyophobic film layers which are alternately stacked; a bottom one of the lyophilic film layers is disposed as the bottommost layer of the pixel partition wall; a top one of the lyophobic film layers is disposed as the uppermost layer of the pixel partition wall; at least two of the light-emitting sub-pixels are different in thickness of at least one of the HIL, the HTL, and the organic light-emitting layer; and each of the HIL, the HTL and the organic light-emitting layer of any of the light-emitting sub-pixels has an upper surface parallel and level to an upper surface of a respective one of the lyophilic film layers of the pixel partition wall; a total number of film layers of the pixel partition wall corresponding to the anode and the HIL for each of the light-emitting sub-pixels is an odd number; a total number of film layers of the pixel partition wall corresponding to the HTL or the organic light-emitting layer for each of the light-emitting sub-pixels is an even number; the at least two of the light-emitting sub-pixels are different in thickness of the HIL, one of the at least two of the light-emitting sub-pixels having a thickest HIL and another one of the at least two of the light-emitting sub-pixels having a thinnest HIL; the anode, the HIL, the HTL and the organic light-emitting layer of the one of the at least two of the light-emitting sub-pixels are separated respectively from the anode, the HIL, the HTL and the organic light-emitting layer of the another one of the at least two of the light-emitting sub-pixels by the pixel partition wall; a total number of film layers of the pixel partition wall corresponding to the anode and the thickest HIL is a first odd number greater than 1, and a total number of film layers of the pixel partition wall corresponding to the anode and the thinnest HIL is a second odd number not less than 1; and the anode and the thickest HIL of the one of the at least two of the light-emitting sub-pixels correspond to the bottom one of the lyophilic film layers, a bottom one of the lyophobic film layers and another one of the lyophilic film layers of the pixel partition wall, the bottom one of the lyophilic film layers being separated from the another one of the lyophilic film layers by the bottom one of the lyophobic film layers.