An OLED display is provided, which includes a first substrate, a second substrate, a first micro-structure layer, a second micro-structure layer and an OLED. The second substrate is disposed opposite to the first substrate. The OLED is disposed at the second substrate. The first micro-structure layer is located between the first and second substrates and includes a plurality first protrusions are disposed in positions corresponding to a peripheral region of the first substrate. The second micro-structure layer includes a plurality of second protrusions, wherein the first and second protrusions are arranged alternatively.
1. An OLED display, comprising:
a first substrate, wherein a display area and a peripheral region surrounding the display area are defined on the first substrate;
a second substrate, disposed opposite to the first substrate;
an OLED, disposed on the second substrate;
a first micro-structure layer, disposed between the first and second substrates and comprising an overcoat layer and a plurality of first protrusions corresponding to the peripheral region and disposed on the overcoat layer; and
a second micro-structure layer, comprising a pixel defined layer and a plurality of second protrusions disposed on the pixel defined layer, wherein the overcoat layer and the pixel defined layer are arranged continuously extending from the display area to the peripheral region, and the first protrusions and second protrusions are alternately arranged.
2. The OLED display as claimed in claim 1 , wherein each of the first protrusion protrudes along a direction away from the first substrate and has a tapered shape, and each of the second protrusion protrudes along a direction away from the second substrate and has a tapered shape.
3. The OLED display as claimed in claim 2 , wherein an acute angle is formed between a lateral side of each of the first protrusion and a bottom side of the corresponding first protrusion, and the acute angle is less than 70 degrees.
4. The OLED display as claimed in claim 2 , wherein an acute angle is formed between a lateral side of each of the second protrusion and a bottom side of the corresponding second protrusion, and the acute angle is less than 70 degrees.
5. The OLED display as claimed in claim 1 , wherein a maximum width of each of the first and second protrusions is between a range from 5 μm to 25 μm.
6. The OLED display as claimed in claim 1 , wherein a pitch between each two of the adjacent first protrusions is between a range of 10 μm to 30 μm, and a pitch between each two of the adjacent second protrusions is between a range of 10 μm to 30 μm.
7. The OLED display as claimed in claim 1 , further comprising a passivation layer formed on the second micro-structure layer.
8. The OLED display as claimed in claim 1 , wherein a height of each of the first and second protrusions is between a range from 1.5 μm to 7 μm.
9. The OLED display as claimed in claim 1 , further comprising a sealant, connected between the first substrate and the second substrate, wherein the peripheral region of the first substrate is located at an inner side of the sealant.
10. The OLED display as claimed in claim 9 , wherein the peripheral region of the first substrate comprising an area inwardly extending for a predetermined distance from a position at which the sealant is connected to the first substrate, wherein the predetermined distance is between a range from 0.5 cm to 1 cm.
11. The OLED display as claimed in claim 1 , further comprising a plurality of OLEDs, wherein the second micro-structure further comprises a plurality of pixel defined areas corresponding to the display area, and the OLEDs are disposed in the respective pixel defined areas.
12. The OLED display as claimed in claim 1 , further comprising a color filter corresponding to the display area and disposed on an inner surface of the first substrate.