OLED display

1. An OLED display, comprising:

a substrate;

a plurality of pixel units, wherein each of the pixel unit comprises a first sub-pixel, a second sub-pixel, and a third sub-pixel;

a plurality of first light-emitting units, arranged on the substrate in a matrix, wherein a transverse axis and a longitudinal axis intersecting to the transverse axis divide each of the plurality of first light-emitting units into a first region, a second region, a third region and a fourth region, wherein the first and third regions are located at opposite corners of each of the plurality of first light-emitting units, and each of the plurality of first light-emitting units comprises:

a first light-emissive layer, corresponding to the plurality of first sub-pixels and overlapping the longitudinal axis;

two second light-emissive layers, each corresponding to the plurality of second sub-pixels; and

two third light-emissive layers, each corresponding to the plurality of third sub-pixels, wherein one of the second light-emissive layers and one of the third light-emissive layers are respectively disposed in one of the first and fourth regions, and the other second light-emissive layer and the other third light-emissive layer are respectively disposed in one of the second and third regions, and the two pixel units that are adjacent and arranged in a direction parallel to the longitudinal axis, wherein each of the same color sub-pixels in the two pixel units is symmetrical with each other with respect to the transverse axis.

2. The OLED display as claimed in claim 1 , further comprising a plurality of second light-emitting units, wherein the plurality of first and second light-emitting units are arranged alternatively in a direction parallel to the transverse axis, and each second light-emitting unit comprises a first light-emissive layer adjacent to one of the plurality of first light-emitting units.

3. The OLED display as claimed in claim 1 , wherein lights emitted from the first, second and third light-emissive layers have different wavelengths.

4. The OLED display as claimed in claim 3 , wherein the maximum value among the light emitting wavelength of the first light-emissive layers range from 380 nm to 495 nm, the maximum value among the light emitting wavelength of the second light-emissive layers range from 580 nm to 700 nm, the maximum value among the light emitting wavelength of the third light-emissive layers range from 495 nm to 590 nm.

5. The OLED display as claimed in claim 3 , wherein the light emitted from the first pixels of the first light-emissive layers in an excited state is blue light, the light emitted from the second pixels of the second light-emissive layers in an excited state is red light, and the light emitted from the third pixels of the third light-emissive layers in an excited state is green light.

6. The OLED display as claimed in claim 5 , wherein each of the plurality of first light-emitting units comprises a plurality of pixels units, and each of the plurality of pixel units comprises at least one first sub-pixel, one second sub-pixel and one third sub-pixel.

7. The OLED display as claimed in claim 6 , wherein in a single pixel unit, a total area of the first sub-pixels is larger than an area of the second sub-pixel, and the area of the first sub-pixel is larger than an area of the third sub-pixel.

8. The OLED display as claimed in claim 6 , wherein a length of the first sub-pixels in the direction parallel to the longitudinal axis is larger than a length of the second sub-pixels or a length of the third sub-pixels in the direction parallel to the longitudinal axis.

9. The OLED display as claimed in claim 1 , wherein each of the two second light-emissive layers corresponds to four second pixels, and each of the two third light-emissive layers corresponds to four third pixels.

10. The OLED display as claimed in claim 1 , wherein a distance between one of the second light-emissive layers and the closest third light-emissive layer in the direction parallel to the longitudinal axis is larger than a distance between the second sub-pixels in each of the second light-emissive layer and is larger than a distance between the third sub-pixels in each of the third light-emissive layer.

11. The OLED display as claimed in claim 1 , wherein a distance between one of the second light-emissive layers and the closest first light-emissive layer in a direction parallel to the transverse axis or a distance between one of the third light-emissive layers and the closest first light-emissive layer in the direction parallel to the transverse axis is larger than a distance between the second sub-pixels in each of the second light-emissive layer and is larger than a distance between the third sub-pixels in each of the third light-emissive layer and is larger than a distance between the first sub-pixels in each of the first light-emissive layer.

12. The OLED display as claimed in claim 1 , wherein a distance between one of the second light-emissive layers and the closest first light-emissive layer in a direction parallel to the transverse axis or a distance between the third light-emissive layer and the closest first light-emissive layer in the direction parallel to the transverse axis is larger than a distance between the first sub-pixels in each of the first light-emissive layer.

13. The OLED display as claimed in claim 1 , wherein in each of the plurality of first light-emitting units, one of the two second light-emissive layers is disposed in the first region, and the other second light-emissive layer is disposed in the second region.

14. The OLED display as claimed in claim 1 , wherein in each of the plurality of first light-emitting units, one of the two second light-emissive layers is disposed in the first region, and the other second light-emissive layer is disposed in the third region.

15. The OLED display as claimed in claim 1 , wherein in the direction parallel to the longitudinal axis, the first sub-pixels are spaced by the same distance.

16. The OLED display as claimed in claim 1 , wherein in the direction parallel to the longitudinal axis, the first sub-pixels are spaced by a first distance and a second distance different from the first distance, periodically.

17. The OLED display as claimed in claim 1 , wherein in each of the plurality of first light-emitting units, the sub-pixels in the first and fourth regions and the sub-pixels in the second and third regions are symmetrical with each other with respect to the longitudinal axis.

18. The OLED display as claimed in claim 1 , wherein in each of the plurality of first light-emitting units, the sub-pixels in the first region and the sub-pixels in the third region are point symmetric to a center of each of the plurality of first light-emitting units.

19. The OLED display as claimed in claim 1 , wherein the first, second and third sub-pixels are top-emitting OLEDs or bottom-emitting OLEDs.

20. An OLED display, comprising:

a substrate; and

a plurality of pixel units, wherein each of the plurality of pixel units comprises:

a first sub-pixel;

a second sub-pixel; and

a third sub-pixel, wherein the configuration of the first, second and third sub-pixels in each of the two neighboring pixel units are symmetrical with each other.

21. The OLED display as claimed in claim 20 , comprising:

a first light-emissive layer, corresponding to a plurality of first sub-pixels;

a second light-emissive layer, corresponding to four second sub-pixels, wherein the four second sub-pixels are simultaneously formed in the same evaporation process, and the second light-emissive layer among the four second sub-pixels is continuously extended; and

a third light-emissive layer, corresponding to four third sub-pixels, wherein the four third sub-pixels are simultaneously formed in the same evaporation process, and the third light-emissive layer among the four third sub-pixels is continuously extended.