OLED display panel, method of manufacturing same, and micro lens

A method of manufacturing an OLED display panel, comprising:

• a step S10, providing a substrate and sequentially forming a TFT layer and a pixel definition layer on the substrate, wherein the pixel definition layer is disposed separately to form a plurality of pixel opening areas;
• a step S20, sequentially laminating the pixel opening area from inside to outside to form an anode, a light emitting unit, a cathode, a first encapsulation layer, and a micro lens, wherein the first encapsulation layer is formed by stacking an inorganic layer, an organic layer, and an inorganic layer;
• wherein the step S20 of sequentially laminating the pixel opening area from inside to outside to form the anode, the light emitting unit, the cathode, the first encapsulation layer, and the micro lens further comprises:
• spraying ink droplets on a surface of the first encapsulation layer in the pixel opening area using an inkjet printing technology, curing the ink droplets to form a first micro lens, wherein the first micro lens protrudes and closes the pixel opening area;
• after the first micro lens is completed, coating a first planarization layer on a surface of the first micro lens and depositing a second encapsulation layer on the first planarization layer, wherein a refractive index of the first micro lens is less than a refractive index of the first planarization layer, and the second encapsulation layer comprises an inorganic layer;
• spraying ink droplets on a surface of the second encapsulation layer using the inkjet printing technology, curing the ink droplets to form a second micro lens, wherein the second micro lens is aligned with the first micro lens and covers the first micro lens and the pixel opening area;
• after the second micro lens is completed, coating a second planarization layer on a surface of the second micro lens, wherein a refractive index of the second micro lens is greater than a refractive index of the second planarization layer;
• wherein when light enters the first planarization layer from the first micro lens, a viewing angle of the light changes from θ1 to θ2, and θ1 is greater than θ2;
• when the light is shifted toward a center of the first micro lens, the light enters the second planarization layer from the second micro lens, and a viewing angle of the light changes from θ3 to θ4, θ3 is less than θ4, and θ4 is greater than θ1;
• wherein both the first micro lens and the second micro lens each have an arc-shaped structure and a side facing the substrate being a plane, a horizontal angle θ5 of the arc-shaped structure near a center line at first position is less than a horizontal angle θ6 away from the center line at a second position, a pixel unit on the OLED display panel has virtual pixel units on the arc-shaped structure, and most of the light of the virtual pixel units exits along a vertical direction of an outline of the arc-shaped structure;
• wherein the first encapsulation layer comprises an accommodation recess defined in a surface of the first encapsulation layer away from the substrate and tapered along a direction from the first encapsulation layer to the substrate, the first micro lens is accommodated in the accommodation recess, and a bottom and two sides of the first micro lens is attached an inner surface of the accommodation recess of the first encapsulation layer.