Mask plate, OLED display substrate, method for manufacturing the OLED display substrate, and display device
The present disclosure provides a mask plate, an OLED display substrate and a method for manufacturing the OLED display substrate, and a display device. The mask plate comprises a plurality of openings arranged as an array and configured to prepare patterns of a pixel definition layer, wherein a width of the opening close to a first side of the mask plate in a first direction is greater than that of the opening away from the first side of the mask plate, and the first direction is a direction from the opening close to the first side of the mask plate to the opening away from the first side of the mask plate. A slope angle of the pattern of the pixel definition layer close to a second side of the OLED display substrate is smaller than that away from the second side of the OLED display substrate.
1. An organic light-emitting diode (OLED) display substrate, wherein a slope angle of a pattern of a pixel definition layer close to a second side of the OLED display substrate is smaller than a slope angle of a pattern of a pixel definition layer away from the second side of the OLED display substrate,
wherein the OLED display substrate comprises a 1 st region, a 2 nd region, . . . , and an n th region arranged sequentially in a second direction in which the second direction is a direction from a region close to the second side of the OLED display substrate to a region away from the second side of the OLED display substrate, each of the regions comprises at least one pattern of the pixel definition layer, and the patterns of the pixel definition layer in each region have an identical slope angle, and the slope angle of the pattern(s) of the pixel definition layer in a (k−1) th region is smaller than the slope angle of the pattern(s) of the pixel definition layer in a k th region, where k is an integer greater than 1 and not greater than n.
2. The OLED display substrate according to claim 1 , wherein the slope angle of the pattern(s) of the pixel definition layer in the (k−1) th region is half of a sum of the slope angle of the pattern(s) of the pixel definition layer in a (k−2) th region and the slope angle of the pattern(s) of the pixel definition layer in the k th region, where k is an integer greater than 2 and not greater than n.
3. The OLED display substrate according to claim 1 , wherein the slope angle of the pattern(s) of the pixel definition layer in the 1 st region is in the range of 15° to 20°, and the slope angle of the pattern(s) of the pixel definition layer in the n th region is in the range of 25° to 30°.
4. The OLED display substrate according to claim 1 , further comprising a cathode covering the patterns of the pixel definition layer, wherein a thickness of a portion of the cathode on a slope of the pattern of the pixel definition layer close to the second side of the OLED display substrate is greater than a thickness of a portion of the cathode on the slope of the pattern of the pixel definition layer away from the second side of the OLED display substrate.
5. The OLED display substrate according to claim 4 , wherein a resistance of the portion of the cathode close to the second side of the OLED display substrate is smaller than a resistance of the portion of the cathode away from the second side of the OLED display substrate.
6. The OLED display substrate according to claim 4 , wherein the slope angle of the pattern(s) of the pixel definition layer in the (k−1) th region is half of a sum of the slope angle of the pattern(s) of the pixel definition layer in a (k−2) th region and the slope angle of the pattern(s) of the pixel definition layer in the k th region, where k is an integer greater than 2 and not greater than n.
7. The OLED display substrate according to claim 4 , wherein the slope angle of the pattern(s) of the pixel definition layer in the 1 st region is in the range of 15° to 20°, and the slope angle of the pattern(s) of the pixel definition layer in the n th region is in the range of 25° to 30°.
8. A display device, comprising the OLED display substrate according to claim 1 , as well as a driving circuit arranged immediately adjacent to the second side of the OLED display substrate and connected to a cathode.
9. The display device according to claim 8 , wherein the slope angle of the pattern(s) of the pixel definition layer in a (k−1) th region is half of a sum of the slope angle of the pattern(s) of the pixel definition layer in the (k−2) th region and the slope angle of the pattern(s) of the pixel definition layer in the k th region, where k is an integer greater than 2 and not greater than n.
10. The display device according to claim 8 , wherein the slope angle of the pattern(s) of the pixel definition layer in the 1 st region is in the range of 15° to 20°, and the slope angle of the pattern(s) of the pixel definition layer in the n th region is in the range of 25° to 30°.
11. The display device according to claim 8 , wherein the OLED display substrate further comprises a cathode covering the patterns of the pixel definition layer, and a thickness of a portion of the cathode on a slope of the pattern of the pixel definition layer close to the second side of the OLED display substrate is greater than a thickness of a portion of the cathode on the slope of the pattern of the pixel definition layer away from the second side of the OLED display substrate.
12. The display device according to claim 8 , wherein a resistance of the portion of the cathode close to the second side of the OLED display substrate is smaller than a resistance of the portion of the cathode away from the second side of the OLED display substrate.
13. An organic light-emitting diode (OLED) display substrate, wherein a slope angle of a pattern of a pixel definition layer close to a second side of the OLED display substrate is smaller than a slope angle of a pattern of a pixel definition layer away from the second side of the OLED display substrate,
wherein the OLED display substrate comprises a cathode covering the patterns of the pixel definition layer, wherein a thickness of a portion of the cathode on a slope of the pattern of the pixel definition layer close to the second side of the OLED display substrate is greater than a thickness of a portion of the cathode on the slope of the pattern of the pixel definition layer away from the second side of the OLED display substrate, and
wherein a resistance of the portion of the cathode close to the second side of the OLED display substrate is smaller than a resistance of the portion of the cathode away from the second side of the OLED display substrate.
14. A display device, comprising the OLED display substrate according to claim 13 , as well as a driving circuit arranged immediately adjacent to the second side of the OLED display substrate and connected to a cathode.