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CN-122003980-A - Display substrate, design method thereof and display device

CN122003980ACN 122003980 ACN122003980 ACN 122003980ACN-122003980-A

Abstract

A display substrate, a design method thereof and a display device are provided. The display substrate comprises a substrate and a light emitting device layer and a touch layer which are sequentially arranged far away from the substrate, wherein the light emitting device layer comprises a plurality of repeating units, at least part of the repeating units comprise a plurality of sub-pixels, the plurality of sub-pixels comprise a first color sub-pixel, a second color sub-pixel and a third color sub-pixel, the first color sub-pixel comprises the first sub-pixel and the second sub-pixel, the touch layer comprises a plurality of touch wires, the touch wires comprise first sub-touch wires positioned between the first sub-pixel and the third color sub-pixel, at least part of the first sub-touch wires and orthographic projections of adjacent first sub-pixels on the substrate are separated by a first distance, at least part of the first sub-touch wires and orthographic projections of adjacent third color sub-pixels on the substrate are separated by a second distance, and the first distance and the second distance are unequal.

Inventors

  • LIU QI
  • WU RENJIE
  • NIE WEIQING
  • SONG WEN
  • GAO DONGYU
  • DENG CHENGJI
  • NIE HAN
  • Tong Xunfei
  • CHEN LI
  • YANG CHUNMEI
  • CHEN JIA
  • DU LING

Assignees

  • 京东方科技集团股份有限公司
  • 重庆京东方显示技术有限公司

Dates

Publication Date
20260508
Application Date
20250123
Priority Date
20240902

Claims (18)

  1. A display substrate, comprising: a substrate base; A light emitting device layer on one side of the substrate, the light emitting device layer comprising a plurality of repeating units, at least a portion of the repeating units comprising a plurality of sub-pixels including a first color sub-pixel, a second color sub-pixel, and a third color sub-pixel, the first color sub-pixel comprising a first sub-pixel and a second sub-pixel, and The touch layer is arranged on one side of the light-emitting device layer, which is far away from the substrate, and comprises a plurality of touch wires which are distributed in a net shape and are provided with a plurality of meshes, the orthographic projections of the plurality of sub-pixels on the substrate are respectively positioned in the orthographic projection areas of the plurality of meshes on the substrate, The touch control wiring comprises a first sub-touch control wiring located between the first sub-pixel and the third color sub-pixel, at least part of the first sub-touch control wiring and adjacent front projections of the first sub-pixel and the first sub-pixel are separated by a first distance, at least part of the first sub-touch control wiring and adjacent front projections of the third color sub-pixel and the first sub-pixel are separated by a second distance, and the first distance and the second distance are unequal.
  2. The display substrate of claim 1, wherein the touch trace comprises a second sub-touch trace located between the second color sub-pixel and the second sub-pixel, at least a portion of the second sub-touch trace and an orthographic projection of an adjacent second color sub-pixel on the substrate being spaced a third distance, at least a portion of the second sub-touch trace and an orthographic projection of an adjacent second sub-pixel on the substrate being spaced a fourth distance, the third distance and the fourth distance being unequal.
  3. The display substrate according to claim 2, wherein the light emitting device layer comprises a first electrode layer on a side of the substrate, a light emitting function layer on a side of the first electrode layer away from the substrate, and a second electrode layer on a side of the light emitting function layer away from the substrate, the second electrode layer having a first thickness in a first direction, the touch layer having a second thickness in the first direction, a ratio of the first thickness to the second thickness being in a range of 0.035 to 0.05, the first direction being parallel to a light emitting direction of the display substrate, and The first distance is greater than the second distance and the third distance is less than the fourth distance.
  4. The display substrate according to claim 3, wherein the first thickness is in a range of 16 nm to 20 nm, and The difference between the first distance and the second distance is greater than the difference between the fourth distance and the third distance.
  5. The display substrate according to claim 3 or 4, wherein the display substrate further comprises a pixel defining layer between the first electrode layer and the light emitting function layer, the pixel defining layer comprising a plurality of pixel defining portions defining a plurality of pixel openings, In the second direction, the pixel defining portion has a first width, the touch trace has a second width, a ratio of the first width to the second width is greater than or equal to 2.5 and less than or equal to 15, and the second direction is parallel to a direction in which the first color sub-pixel points to the third color sub-pixel.
  6. The display substrate of claim 5, wherein the first width is in a range of 17 micrometers to 26 micrometers, and/or, The second width is in the range of 2 microns to 6 microns.
  7. The display substrate of claim 2, wherein the first color sub-pixel is configured to emit light of a first wavelength, the second color sub-pixel is configured to emit light of a second wavelength, the third color sub-pixel is configured to emit light of a third wavelength, the first wavelength is less than the second wavelength, the first wavelength is greater than the third wavelength; the display substrate further includes a light extraction layer between the light emitting device layer and the touch layer, a refractive index of the light of the second wavelength in the light extraction layer is smaller than a refractive index of the light of the first wavelength in the light extraction layer, a refractive index of the light of the first wavelength in the light extraction layer is smaller than a refractive index of the light of the third wavelength in the light extraction layer, Wherein the thickness of the light extraction layer in a first direction is 70 nm or less, the first direction is parallel to the light emitting direction of the display substrate, and The first distance is less than the second distance and the third distance is less than the fourth distance.
  8. The display substrate of claim 7, wherein a difference between the second distance and the first distance is substantially equal to a difference between the fourth distance and the third distance.
  9. The display substrate according to claim 2, wherein the light emitting device layer comprises a light emitting functional layer comprising a first light emitting layer configured to emit light of a first wavelength, a doping concentration of a doping material in the first light emitting layer being 10% or more, and/or a thickness of the first light emitting layer in a first direction, which is parallel to a light emitting direction of the display substrate, being 33 nm or more, and The first distance is less than the second distance, and the third distance and the fourth distance are substantially equal.
  10. The display substrate according to claim 9, wherein the light emitting functional layer comprises a P-type doped layer on a side of the first light emitting layer close to the substrate, a doping concentration of a doping material in the P-type doped layer is 0.2% or less, and The difference between the second distance and the first distance is in the range of 2 micrometers to 3 micrometers.
  11. The display substrate according to any one of claims 2-10, wherein a ratio of an absolute value of a difference between the first distance and the second distance to the first width is in a range of 0.018 to 0.21, and/or, The ratio of the absolute value of the difference between the third distance and the fourth distance to the first width is in the range of 0.018 to 0.21.
  12. The display substrate of claim 11, wherein an absolute value of a difference between the first distance and the second distance is in a range of 0.5 micrometers to 3.5 micrometers.
  13. The display substrate of claim 11 or 12, wherein an absolute value of a difference between the third distance and the fourth distance is in a range of 0.5 micrometers to 3.5 micrometers.
  14. The display substrate of claim 5 or 6, wherein the plurality of pixel openings comprises a first pixel opening, a second pixel opening, a third pixel opening, and a fourth pixel opening, the first subpixel is located in the first pixel opening, the second color subpixel is located in the second pixel opening, the third color subpixel is located in the third pixel opening, the second subpixel is located in the fourth pixel opening, and Wherein the area of the orthographic projection of the first pixel opening on the substrate and the area of the orthographic projection of the fourth pixel opening on the substrate are substantially equal, and/or the ratio of the area of the orthographic projection of the second pixel opening on the substrate to the area of the orthographic projection of the first pixel opening on the substrate is within the range of 1-2, and/or the ratio of the area of the orthographic projection of the third pixel opening on the substrate to the area of the orthographic projection of the first pixel opening on the substrate is greater than or equal to 2.
  15. The display substrate of any of claims 1-14, wherein the display substrate further comprises an encapsulation layer between the light emitting device layer and the touch layer, the encapsulation layer comprising a second encapsulation sub-layer, the material of the second encapsulation sub-layer comprising an organic material, the thickness of the second encapsulation sub-layer in a first direction being in the range of 2 micrometers to 24 micrometers, the first direction being parallel to the light exit direction of the display substrate.
  16. The display substrate of claim 15, further comprising a buffer layer between the encapsulation layer and the touch layer, the material of the buffer layer comprising an inorganic material, the thickness of the buffer layer in the first direction being in the range of 1 to 5 microns.
  17. A display device comprising the display substrate according to any one of claims 1 to 16.
  18. A method for designing a display substrate, comprising: Acquiring an initial test result of an initial display substrate; optimizing the structure of the initial display substrate by utilizing a first set of design parameters according to the initial test result to obtain an intermediate display substrate; obtaining the intermediate test result of the intermediate display substrate and Optimizing the structure of the intermediate display substrate by using a second set of design parameters according to the intermediate test result to obtain a target display substrate, The target display substrate comprises a substrate, a light emitting device layer, a touch layer and a touch layer, wherein the light emitting device layer is positioned on one side of the substrate, the light emitting device layer comprises a plurality of repeating units, at least part of the repeating units comprise a plurality of sub-pixels, the plurality of sub-pixels comprise a first color sub-pixel, a second color sub-pixel and a third color sub-pixel, the first color sub-pixel comprises a first sub-pixel and a second sub-pixel, the touch layer is arranged on one side of the light emitting device layer far away from the substrate, the touch layer comprises a plurality of touch wires, the touch wires are distributed in a net shape, a plurality of meshes are formed, orthographic projections of the plurality of sub-pixels on the substrate are respectively positioned in orthographic projection areas of the plurality of meshes on the substrate, the touch wires comprise first sub-touch wires positioned between the first sub-pixel and the third color sub-pixel, at least part of the first sub-touch wires and adjacent first sub-pixels are spaced from each other by at least a distance between the orthographic projections of the first sub-pixels and the second sub-pixels on the adjacent substrate, The optimizing the structure of the intermediate display substrate by using the second set of design parameters, and obtaining the target display substrate comprises adjusting the first distance and the second distance so that the first distance and the second distance are unequal.

Description

Display substrate, design method thereof and display device The present application claims the benefit of the chinese patent application of application number 202411223963.8, filed on month 9 and 2 of 2024, the entire disclosure of which is incorporated herein by reference. Technical Field The present disclosure relates to the field of display technology, and in particular, to a display substrate, a design method thereof, and a display device. Background Organic Light-Emitting Diodes (OLEDs) are also called Organic Light-Emitting Diodes (OLEDs), and have great development potential in the display field due to their Light weight, high color saturation, active Light emission, fast display speed, and power saving, and are currently commercially used in mobile display terminals. With the development of commercialization, the performance requirements of the OLED products in the market are further improved, for example, the service life, low crosstalk, visual angle performance, high transmittance, power consumption, and other performance requirements of the OLED products are further improved. Wherein, life span, low crosstalk, visual angle performance, high transmittance, power consumption and the like are important indexes influencing the comprehensive optical characteristics of the OLED product, and after optimizing certain optical characteristic indexes of the OLED product, other optical characteristic indexes may be degraded. Therefore, how to improve the comprehensive optical characteristics of OLED products is one of the important subjects of research by researchers in the field. The above information disclosed in this section is only for understanding the background of the technical idea of the present disclosure, and thus, the above information may contain information that does not constitute prior art. Disclosure of Invention In one aspect, there is provided a display substrate, including: a substrate base; A light emitting device layer on one side of the substrate, the light emitting device layer comprising a plurality of repeating units, at least a portion of the repeating units comprising a plurality of sub-pixels including a first color sub-pixel, a second color sub-pixel, and a third color sub-pixel, the first color sub-pixel comprising a first sub-pixel and a second sub-pixel, and The touch layer is arranged on one side of the light-emitting device layer, which is far away from the substrate, and comprises a plurality of touch wires which are distributed in a net shape and are provided with a plurality of meshes, the orthographic projections of the plurality of sub-pixels on the substrate are respectively positioned in the orthographic projection areas of the plurality of meshes on the substrate, The touch control wiring comprises a first sub-touch control wiring located between the first sub-pixel and the third color sub-pixel, at least part of the first sub-touch control wiring and adjacent front projections of the first sub-pixel and the first sub-pixel are separated by a first distance, at least part of the first sub-touch control wiring and adjacent front projections of the third color sub-pixel and the first sub-pixel are separated by a second distance, and the first distance and the second distance are unequal. According to an exemplary embodiment of the present disclosure, the touch trace includes a second sub-touch trace located between the second color sub-pixel and the second sub-pixel, at least a portion of the second sub-touch trace and an adjacent orthographic projection of the second color sub-pixel on the substrate are separated by a third distance, at least a portion of the second sub-touch trace and an adjacent orthographic projection of the second sub-pixel on the substrate are separated by a fourth distance, and the third distance and the fourth distance are unequal. According to an exemplary embodiment of the present disclosure, the light emitting device layer includes a first electrode layer located at one side of the substrate, a light emitting function layer located at one side of the first electrode layer away from the substrate, and a second electrode layer located at one side of the light emitting function layer away from the substrate, the second electrode layer having a first thickness in a first direction, the touch layer having a second thickness in the first direction, a ratio of the first thickness to the second thickness being in a range of 0.035 to 0.05, the first direction being parallel to a light emitting direction of the display substrate, and The first distance is greater than the second distance and the third distance is less than the fourth distance. According to an exemplary embodiment of the present disclosure, the first thickness is in a range of 16 nanometers to 20 nanometers, and The difference between the first distance and the second distance is greater than the difference between the fourth distance and the third distance. According to an exemplary