Method for manufacturing OLED display screen and OLED display screen
The present disclosure provides a method for manufacturing an OLED display screen and an OLED display screen. The method includes: providing a base substrate; forming OLED devices on the base substrate; forming a protection layer on the OLED devices; forming a cavity extending through the protection layer and a function layer of the OLED devices in a region where a through hole is to be formed; and forming a film encapsulation layer with the film encapsulation layer covering a lateral wall of the function layer of the OLED devices that defines the cavity.
1. An organic light emitting diode (OLED) display screen comprising:
a base substrate;
a buffer layer on the base substrate;
OLED devices;
a protection layer; and
a film encapsulation layer;
wherein the buffer layer, the OLED devices, the protection layer and the film encapsulation layer are sequentially formed on the base substrate;
wherein the OLED display screen further includes a through hole defined through the buffer layer, the protection layer, a function layer of the OLED devices and the base substrate; and
wherein the film encapsulation layer covers a lateral wall of the function layer of the OLED devices that surrounds the through hole;
wherein the function layer has a first surface and a second surface; the first surface and the second surface are two opposite surfaces of the function layer; the first surface is in direct contact with the buffer layer; the lateral wall is located between the first surface and the second surface, and is adjacent the through hole;
the protection layer is directly formed on the second surface and has a lateral surface adjacent the through hole;
the film encapsulation layer includes a first portion and a second portion; the first portion is in direct contact with a surface of the protection layer distal to the second surface; the second portion extends from the first portion; the second portion covers the lateral wall and the lateral surface; the second portion is in direct contact with the lateral wall and the lateral surface.
2. The OLED display screen of claim 1 , wherein the film encapsulation layer includes a first encapsulation layer, a second encapsulation layer and a third encapsulation layer that are sequentially formed on the protection layer; the first encapsulation layer and the third encapsulation layer are made of inorganic material, and the second encapsulation layer is made of organic material.
3. The OLED display screen of claim 1 , wherein the second portion is in direct contact with the buffer layer.
4. The OLED display screen of claim 3 , wherein the second portion is perpendicular to the first portion and the base substrate.
5. The OLED display screen of claim 2 , wherein the first encapsulation layer includes a first extension portion and a second extension portion; the first extension portion is in direct contact with the surface of the protection layer distal to the second surface; the second extension portion extends from the first extension portion; the second extension portion covers the lateral wall and the lateral surface; the second extension portion is in direct contact with the lateral wall and the lateral surface.
6. The OLED display screen of claim 5 , wherein the second encapsulation layer is directly formed on a surface of the first extension portion distal to the surface of the protection layer.
7. The OLED display screen of claim 6 , wherein the third encapsulation layer includes a third extension portion and a fourth extension portion; the third extension portion is directly formed on a surface of the second encapsulation layer distal to the surface of first extension portion; the fourth extension portion extends from the third extension portion; the fourth extension portion covers a lateral side of the second encapsulation layer and a lateral side of the second extension portion; the fourth extension portion is in direct contact with the lateral side of the second encapsulation layer and the lateral side of the second extension portion.
8. The OLED display screen of claim 7 , wherein the second extension portion is perpendicular to the first extension portion and is in direct contact with the buffer layer; and the fourth extension portion is perpendicular to the third extension portion and is in direct contact with the buffer layer.