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EP-3783651-B1 - DISPLAY APPARATUS

EP3783651B1EP 3783651 B1EP3783651 B1EP 3783651B1EP-3783651-B1

Inventors

  • KONG, KIHO
  • CHOI, JUNHEE

Dates

Publication Date
20260513
Application Date
20200728

Claims (12)

  1. A display apparatus comprising: a substrate (100); a light-emitting device provided on the substrate; a driving transistor (MD) provided on the substrate and configured to control the light-emitting device; a first power supply line (VL1) provided on the substrate and electrically connected to a source region of the driving transistor; a conductive pattern (350) provided on the substrate and electrically connected to a gate electrode of the driving transistor; a second power supply line (VL2) provided on the substrate and electrically connected to the first power supply line; and a first power supply line pad (VLP1), extending in a first direction parallel to a top surface of the substrate, and a second power supply line pad (VLP2), extending in a second direction parallel to a top surface of the substrate and perpendicular to the first direction, configured to provide a driving voltage for driving the light-emitting device and provided in a non-display area of the display apparatus, wherein the conductive pattern and the first power supply line constitute a first capacitor (C1), wherein the conductive pattern and the second power supply line constitute a second capacitor (C2), wherein the first capacitor and the second capacitor are connected in parallel, wherein the second power supply line extends from the second power supply line pad in the first direction protruding in the second direction, and wherein the first power supply line extends from the first power supply line pad in the second direction and overlaps the protrusion in a third direction perpendicular to a top surface of the substrate; wherein the conductive pattern extends between the protrusion and the first power supply line in the second direction, and overlaps the first power supply line and the second power supply line in the third direction.
  2. The display apparatus of claim 1, wherein the light-emitting device comprises: a lower semiconductor layer (210) provided on the substrate (100); an upper semiconductor layer (230) provided on the lower semiconductor layer; an emission layer provided between the lower semiconductor layer and the upper semiconductor layer; and an anode (250) provided on the upper semiconductor layer, wherein the anode overlaps the second power supply line (VL2) in the second direction.
  3. The display apparatus of claim 2, wherein the anode (250) extends along a top surface of the upper semiconductor layer (230) and has an opening that exposes the top surface of the upper semiconductor layer.
  4. The display apparatus of claim 2, wherein the anode (250) entirely covers a top surface of the upper semiconductor layer.
  5. The display apparatus of any preceding claim, wherein the driving transistor (MD) comprises an active pattern (AP1) comprising the source region and a drain region, wherein, in the third direction, the active pattern and the second power supply line are spaced apart from each other.
  6. The display apparatus of any preceding claim, further comprising a data line (DL) extending in the second direction, wherein, in the third direction, the conductive pattern is spaced apart from the data line.
  7. The display apparatus of any of claims 1 to 5, further comprising a data line (DL) extending in the second direction, wherein the conductive pattern overlaps the data line in the third direction.
  8. The display apparatus of claim 7, wherein, in the third direction, the conductive pattern crosses the data line.
  9. The display apparatus of any preceding claim, further comprising: a data line (DL) provided on the substrate (100) and extending in the second direction; a scan line (SL) provided on the substrate and extending in the first direction; and a switching transistor device (MS) provided in an area of the substrate where the data line and the scan line intersect each other, wherein the data line is electrically connected to a source region of the switching transistor device, the scan line is electrically connected to a gate electrode of the switching transistor device, and the conductive pattern is electrically connected to a drain region of the switching transistor device.
  10. The display apparatus of claim 9, wherein, in the third direction, the second power supply line (VL2) is spaced apart from the scan line.
  11. The display apparatus of claim 10, wherein, in the third direction, the second power supply line (VL2) crosses the scan line.
  12. The display apparatus of any preceding claim, wherein a width of a portion of the conductive pattern (350) is the same as a width of the second power supply line (VL2) overlapping the portion of the conductive pattern in the third direction.

Description

FIELD OF THE INVENTION The disclosure relates to a display apparatus. BACKGROUND OF THE INVENTION Liquid crystal displays (LCDs) and organic light-emitting diode (OLED) displays are widely used as display apparatuses. Recently, technology for manufacturing a high resolution display apparatus by using a micro-light-emitting diode (LED) has been in the spotlight. However, high-efficiency small LED chips need to be manufactured in order to manufacture a high-resolution display apparatus by using a micro-LED, and high-level transfer technology is required in order to arrange the small LED chips at appropriate positions on the display apparatus. Korean Patent Application Publication Number KR 2004 0061256 A presents a display apparatus with a light emitting device and multiple power supply lines. United States Patent Application Publication Number US 2003/122497 A1 relates to an active matrix organic electroluminescence display. Korean Patent Publication Number KR 100 730 154 B1 SUMMARY OF THE INVENTION The invention is defined by the claims According to an aspect of the disclosure, electrical characteristics of a display apparatus may be improved. Additional aspects will be set forth in part in the description which follows and, in part, will be apparent from the description, or may be learned by practice of the exemplary embodiments of the disclosure. According to an aspect of the disclosure, there is provided a display apparatus according to claim 1. Proposed concepts may, for example, relate to a pixel circuit structure for a micro LED panel. Such a pixel circuit structure may reduce a resistance of the VDD line and increase the Cst capacity without additional process and mask increase. By way of example, embodiments may utilize top metal of LED process without any additional process. This may realise a reduction of VDD line resistance and Cst increase in a high brightness and high ppi structure. The Metal line and VDD power mesh of TFT process may be formed using LED P electrode metal, securing additional Cst capacity in pixel circuit by utilizing LED P electrode metal. The light-emitting device may comprise: a lower semiconductor layer provided on the substrate; an upper semiconductor layer provided on the lower semiconductor layer; an emission layer provided between the lower semiconductor layer and the upper semiconductor layer; and an anode provided on the upper semiconductor layer, wherein the anode overlaps the second power supply line in a direction parallel to a top surface of the substrate. The anode may extend along a top surface of the upper semiconductor layer and has an opening that exposes the top surface of the upper semiconductor layer. The anode may entirely cover a top surface of the upper semiconductor layer. The driving transistor may comprise an active pattern comprising the source region and a drain region, wherein, in a direction perpendicular to a top surface of the substrate, the active pattern and the second power supply line may be spaced apart from each other. The display apparatus may further comprise a data line extending in a direction parallel to the first power supply line, wherein, in a direction perpendicular to a top surface of the substrate, the conductive pattern may be spaced apart from the data line. The display apparatus may further comprise a data line extending in a direction parallel to the first power supply line, wherein the conductive pattern may overlap the data line in a direction perpendicular to a top surface of the substrate. In the direction perpendicular to the top surface of the substrate, the conductive pattern may cross the data line. The display apparatus may further comprise: a data line provided on the substrate and extending in a first direction parallel to a top surface of the substrate; a scan line provided on the substrate and extending in a second direction intersecting the first direction; and a switching transistor device provided in an area of the substrate where the data line and the scan line intersect each other, wherein the data line may be electrically connected to a source region of the switching transistor device, the scan line is electrically connected to a gate electrode of the switching transistor device, and the conductive pattern may be electrically connected to a drain region of the switching transistor device. In a third direction perpendicular to the top surface of the substrate, the second power supply line may be spaced apart from the scan line. The second power supply line may overlap the scan line in a third direction perpendicular to the top surface of the substrate. In the third direction perpendicular to the top surface of the substrate, the second power supply line may cross the scan line. A width of a portion of the conductive pattern may be the same as a width of the second power supply line overlapping the portion of the conductive pattern in a direction perpendicular to a top surface of the substrate. According to