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EP-4175443-B1 - DISPLAY APPARATUS

EP4175443B1EP 4175443 B1EP4175443 B1EP 4175443B1EP-4175443-B1

Inventors

  • KIM, ARONG
  • PARK, Jungsun
  • Gwark, Hyejin
  • PARK, HEEMIN
  • Lee, Yeonhwa
  • HWANG, KYUHWAN
  • KIM, JAEIK
  • LEE, JOONGU

Dates

Publication Date
20260506
Application Date
20221101

Claims (14)

  1. A display apparatus (DV) comprising: an auxiliary line (240) that includes a main sublayer (242), a lower sublayer (243) arranged under the main sublayer (242), and an upper sublayer (241) arranged over the main sublayer (242); a partition wall (WL) adjacent to the auxiliary line (240) and that includes an opening (OP) corresponding to a side surface of the auxiliary line (240); a first electrode (310) adjacent to the auxiliary line (240); a second electrode (330) arranged over the first electrode (310) and the auxiliary line (240); and an intermediate layer (320) arranged between the first electrode (310) and the second electrode (330) and that includes an emission layer (322), wherein the upper sublayer (241) of the auxiliary line (240) includes a tip (T) protruding in a lateral direction from a point where a side surface (242s) and an upper surface (242t) of the main sublayer (242) meet each other, an upper end of the partition wall (WL) is spaced apart from the tip (T) of the auxiliary line (240), and the second electrode (330) contacts the auxiliary line (240), wherein the second electrode (330) includes a first portion (330a) that contacts the auxiliary line (240) and a second portion (330b) located opposite the first portion (330a) with respect to the partition wall (WL), and the first portion (330a) and the second portion (330b) are separated from each other around the partition wall (WL) and integrally connected to each other through the opening (OP) of the partition wall (WL).
  2. The display apparatus (DV) of claim 1, further comprising a first insulating layer (107) that includes an opening (107OP) having a greater width (W1) than the auxiliary line (240), wherein a portion of the auxiliary line (240) and the partition wall (WL) are located in the opening (OP) of the first insulating layer (107).
  3. The display apparatus (DV) of claim 1 or claim 2, wherein a thickness (Hw) of the partition wall (WL) is equal to or less than 0.75 times a total thickness (Ht) of the lower sublayer (243) and the main sublayer (242) of the auxiliary line (240).
  4. The display apparatus (DV) of any one of claims 1 to 3, wherein the second electrode (330) directly contacts at least one of a side surface (242s) of the main sublayer (242) of the auxiliary line (240) and an upper surface of the lower sublayer (243) of the auxiliary line (240).
  5. The display apparatus (DV) of any one of claims 1 to 4, wherein a thickness (t2) of the main sublayer (242) is greater than at least one of a thickness of the upper sublayer (241) and a thickness of the lower sublayer (243).
  6. The display apparatus (DV) of any one of claims 1 to 5, wherein the main sublayer (242) includes at least one of copper (Cu), aluminium (Al), platinum (Pt), palladium (Pd), silver (Ag), magnesium (Mg), gold (Au), nickel (Ni), neodymium (Nd), iridium (Ir), chromium (Cr), lithium (Li), calcium (Ca), and molybdenum (Mo).
  7. The display apparatus (DV) of any one of claims 1 to 6, wherein at least one of the upper sublayer (241) and the lower sublayer (243) includes at least one of indium tin oxide (ITO), titanium (Ti), molybdenum (Mo), and tungsten (W).
  8. The display apparatus (DV) of any one of claims 1 to 7, wherein the intermediate layer (320) is arranged over the first electrode (310) and the auxiliary line (240), wherein the intermediate layer (320) includes: a first portion (320R) on an upper surface of the auxiliary line (240); a second portion (320a) arranged on a side of the auxiliary line (240) with respect to the partition wall (WL); and a third portion (320b) located opposite the second portion (320a) with respect to the partition wall (WL).
  9. The display apparatus (DV) of claim 8, wherein the second portion (320a) and the third portion (320b) of the intermediate layer (320) are separated from each other around the partition wall (WL) and integrally connected to each other through the opening (OP) of the partition wall (WL).
  10. The display apparatus (DV) of claim 1, further comprising a first insulating layer (107) that includes a first opening (107OP) that overlaps the auxiliary line (240), wherein the partition wall (WL) is arranged on one side of the auxiliary line (240), and the first electrode (310) is arranged over the first insulating layer (107) and adjacent to the auxiliary line (240).
  11. The display apparatus (DV) of claim 10, wherein the partition wall (WL) is located in the first opening (107OP) of the first insulating layer (107).
  12. The display apparatus (DV) of claim 10 or claim 11, further comprising an additional partition wall (WL) arranged on another side of the auxiliary line (240) and including an opening (OP), optionally wherein the opening (OP) of the additional partition wall (WL) and the opening (OP) of the partition wall (WL) are respectively located on both sides of the auxiliary line (240) and are asymmetrically arranged with respect to the auxiliary line (240).
  13. The display apparatus (DV) of any one of claims 10 to 12, wherein: (i) a width of the first opening (107OP) of the insulating layer is greater than a sum of a width of the auxiliary line (240) and a width of the partition wall (WL); and/or (ii) a thickness (Hw) of the partition wall (WL) is equal to or less than 0.75 times a total thickness (Ht) of the lower sublayer (243) and the main sublayer (242) of the auxiliary line (240).
  14. The display apparatus (DV) of any one of claims 10 to 13, wherein: (i) the second electrode (330) directly contacts at least one of a side surface (242s) of the main sublayer (242) of the auxiliary line (240) and an upper surface of the lower sublayer (243) of the auxiliary line (240); and/or (ii) a thickness of the main sublayer (242) is greater than at least one of a thickness of the upper sublayer (241) and a thickness of the lower sublayer (243); and/or (iii) the main sublayer (242) includes a different material than the upper sublayer (241) and the lower sublayer (243).

Description

BACKGROUND FIELD Embodiments of the invention relate generally to display apparatuses. DISCUSSION OF THE BACKGROUND Generally, in a display apparatus such as an organic light emitting display apparatus, transistors are arranged in a display area to control the luminance of light emitting diodes. The transistors control to emit light with a certain color from the corresponding light emitting diode by using the received data signal, driving voltage, and common voltage. One of the electrodes of the light emitting diode may receive a certain voltage through the transistor, and another one may receive a voltage through an auxiliary line. The above information disclosed in this Background section is only for understanding of the background of the inventive concepts, and, therefore, it may contain information that does not constitute prior art. US 2016/013438 A1 relates to an organic light emitting display device and a manufacturing method thereof. US 2018/190944 A1 relates to an organic light-emitting display device. SUMMARY One or more inventive concepts consistent with embodiments described hereinbelow include a display apparatus capable of displaying a high-quality image. The problems solved by way of the embodiments are merely examples and the scope of the embodiments described herein is not limited thereto. Additional features of the inventive concepts will be set forth in the description that follows, and in part will be apparent from the description, or may be learned by practice of the inventive concepts. According to the claimed invention, a display apparatus includes an auxiliary line that includes a main sublayer, a lower sublayer arranged under the main sublayer, and an upper sublayer arranged over the main sublayer, a partition wall adjacent to the auxiliary line and that includes an opening corresponding to a side surface of the auxiliary line, a first electrode adjacent to the auxiliary line, a second electrode arranged over the first electrode and the auxiliary line, and an intermediate layer arranged between the first electrode and the second electrode and that includes an emission layer, wherein the upper sublayer of the auxiliary line includes a tip protruding in a lateral direction from a point where a side surface and an upper surface of the main sublayer meet each other, an upper end of the partition wall is spaced apart from the tip of the auxiliary line, and the second electrode contacts the auxiliary line, wherein the second electrode includes a first portion contacting the auxiliary line and a second portion located opposite the first portion with respect to the partition wall, and the first portion and the second portion are separated from each other around the partition wall and integrally connected to each other through the opening of the partition wall. In an embodiment, the display apparatus may further include a first insulating layer including an opening having a greater width than the auxiliary line, wherein a portion of the auxiliary line and the partition wall may be located in the opening of the first insulating layer. In an embodiment, a thickness of the partition wall may be equal to or less than 0.75 times a total thickness of the lower sublayer and the main sublayer of the auxiliary line. In an embodiment, the second electrode may directly contact at least one of a side surface of the main sublayer of the auxiliary line and an upper surface of the lower sublayer of the auxiliary line. In an embodiment, a thickness of the main sublayer may be greater than at least one of a thickness of the upper sublayer and a thickness of the lower sublayer. In an embodiment, the main sublayer may include at least one of copper (Cu), aluminium (Al), platinum (Pt), palladium (Pd), silver (Ag), magnesium (Mg), gold (Au), nickel (Ni), neodymium (Nd), iridium (Ir), chromium (Cr), lithium (Li), calcium (Ca), and molybdenum (Mo). In an embodiment, at least one of the upper sublayer and the lower sublayer may include at least one of indium tin oxide (ITO), titanium (Ti), molybdenum (Mo), and tungsten (W). In an embodiment, the intermediate layer may be arranged over the first electrode and the auxiliary line, wherein the intermediate layer may include a first portion on an upper surface of the auxiliary line, a second portion arranged on a side of the auxiliary line with respect to the partition wall, and a third portion located opposite the second portion with respect to the partition wall. In an embodiment, the second portion and the third portion of the intermediate layer may be separated from each other around the partition wall and integrally connected to each other through the opening of the partition wall. According to one or more embodiments, a method of manufacturing a display apparatus includes forming an auxiliary line including a main sublayer, a lower sublayer under the main sublayer, and an upper sublayer over the main sublayer, forming a partition wall adjacent to the auxiliary lin