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KR-102961867-B1 - DISPLAY DEVICE

KR102961867B1KR 102961867 B1KR102961867 B1KR 102961867B1KR-102961867-B1

Abstract

A display device comprises a substrate including a first pixel area and a second pixel area adjacent to the first pixel area in a first direction; a first semiconductor layer disposed on the substrate and disposed in the first pixel area, a second part disposed in the second pixel area and having a shape symmetric to the first part with respect to the boundary between the first pixel area and the second pixel area, and a first connecting part connecting the first part and the second part; a second semiconductor layer disposed on the first semiconductor layer and having a first part disposed in the first pixel area, a second part disposed in the second pixel area and having a shape symmetric to the first part with respect to the boundary between the first pixel area and the second pixel area, and a connecting part connecting the first part and the second part; a bias voltage line disposed on the second semiconductor layer and electrically connected to the first connecting part of the first semiconductor layer and extending in a second direction intersecting the first direction; and a reference voltage line disposed on the second semiconductor layer, electrically connected to the connecting part of the second semiconductor layer, and extending in a second direction.

Inventors

  • 최종현

Assignees

  • 삼성디스플레이 주식회사

Dates

Publication Date
20260508
Application Date
20220118

Claims (20)

  1. A substrate comprising a first pixel region and a second pixel region adjacent to the first pixel region in a first direction; A first semiconductor layer comprising: a first portion disposed on the substrate and disposed in the first pixel area; a second portion disposed in the second pixel area and having a shape symmetric to the first portion with respect to the boundary between the first pixel area and the second pixel area; and a first connecting portion connecting the first portion and the second portion; A second semiconductor layer comprising: a first portion disposed on the first semiconductor layer and disposed in the first pixel region; a second portion disposed in the second pixel region and having a shape symmetric to the first portion with respect to the boundary between the first pixel region and the second pixel region; and a connecting portion connecting the first portion and the second portion; A bias voltage line disposed on the first semiconductor layer, electrically connected to the first connection portion of the first semiconductor layer, and extending in a second direction intersecting the first direction; and A reference voltage line disposed on the second semiconductor layer, electrically connected to the connection portion of the second semiconductor layer, and extending in the second direction, A display device characterized in that the connecting portion of the second semiconductor layer directly connects the first portion and the second portion of the second semiconductor layer.
  2. In paragraph 1, A display device characterized by including a first gate electrode disposed on the first semiconductor layer, wherein a portion of the first portion overlaps with the first portion of the first semiconductor layer to define a first bias transistor, and another portion overlaps with the second portion of the first semiconductor layer to define a second bias transistor.
  3. A display device according to claim 2, wherein the source region of the first bias transistor and the source region of the second bias transistor are the first connection portion of the first semiconductor layer.
  4. In paragraph 2, A display device characterized by including a light emission initialization control line disposed on the second semiconductor layer, extending in the first direction, and electrically connected to the first gate electrode.
  5. In paragraph 1, A display device characterized by including an upper gate electrode disposed on the second semiconductor layer, wherein a portion of the upper gate electrode overlaps with the first portion of the second semiconductor layer to define a first reference transistor, and another portion overlaps with the second portion of the second semiconductor layer to define a second reference transistor.
  6. In paragraph 5, A display device characterized by further including a lower gate electrode disposed below the second semiconductor layer, wherein a portion overlaps with the first portion of the second semiconductor layer and the portion of the upper gate electrode, and another portion overlaps with the second portion of the second semiconductor layer and the other portion of the upper gate electrode.
  7. A display device according to claim 5, characterized in that the drain region of the first reference transistor and the drain region of the second reference transistor are the connection portions of the second semiconductor layer.
  8. A display device according to claim 5, characterized by including a reference voltage control line disposed on the second semiconductor layer, extending in the first direction, and electrically connected to the upper gate electrode.
  9. In paragraph 1, A display device characterized in that the first semiconductor layer comprises a silicon semiconductor, and the second semiconductor layer comprises an oxide semiconductor.
  10. In paragraph 1, A display device characterized by further including an inorganic insulating layer disposed between the first semiconductor layer and the bias voltage line, and having a groove surrounding the first pixel area and the second pixel area.
  11. In Paragraph 10, A display device characterized by further including an organic insulating layer disposed on the inorganic insulating layer and filling the groove of the inorganic insulating layer.
  12. A substrate comprising a first pixel region and a second pixel region adjacent to the first pixel region in a first direction; A first semiconductor layer comprising: a first portion disposed on the substrate and disposed in the first pixel area; a second portion disposed in the second pixel area and having a shape symmetric to the first portion with respect to the boundary between the first pixel area and the second pixel area; and a first connecting portion connecting the first portion and the second portion; A second semiconductor layer comprising: a first portion disposed on the first semiconductor layer and disposed in the first pixel area; a second portion disposed in the second pixel area and having a shape symmetric to the first portion with respect to the boundary between the first pixel area and the second pixel area; a connecting portion connecting the first portion and the second portion; a third portion disposed in the first pixel area; and a fourth portion disposed in the second pixel area, having a shape symmetric to the third portion with respect to the boundary between the first pixel area and the second pixel area, and spaced apart from the third portion. A reference voltage line disposed on the second semiconductor layer, electrically connected to the connection portion of the second semiconductor layer, and extending in a second direction intersecting the first direction; and It includes an initialization voltage line disposed on the second semiconductor layer and electrically connected to the third portion of the second semiconductor layer and the fourth portion of the second semiconductor layer, A display device characterized in that the connecting portion of the second semiconductor layer directly connects the first portion and the second portion of the second semiconductor layer.
  13. In Clause 12, the above initialization voltage line is, A horizontal initialization voltage line extending in the first direction, electrically connected to the third portion of the second semiconductor layer and the fourth portion of the second semiconductor layer; and A display device characterized by including a vertical initialization voltage line electrically connected to the third portion of the second semiconductor layer.
  14. In claim 13, a first bridge electrode disposed on the second semiconductor layer, electrically connecting the third portion of the second semiconductor layer and the first portion of the first semiconductor layer, and electrically connected to each of the horizontal initialization voltage line and the vertical initialization voltage line; and A display device characterized by including a second bridge electrode disposed on the second semiconductor layer, electrically connecting the fourth portion of the second semiconductor layer and the second portion of the first semiconductor layer, and electrically connecting to the horizontal initialization voltage line.
  15. A substrate comprising a first pixel region and a second pixel region adjacent to the first pixel region in a first direction; A first semiconductor layer comprising: a first portion disposed on the substrate and disposed in the first pixel area; a second portion disposed in the second pixel area and having a shape symmetric to the first portion with respect to the boundary between the first pixel area and the second pixel area; a first connecting portion connecting the first portion and the second portion; and a second connecting portion connecting the first portion and the second portion and spaced apart from each other in a second direction intersecting the first connecting portion and the first direction. A bias voltage line disposed on the first semiconductor layer, electrically connected to the first connection portion of the first semiconductor layer, and extending in the second direction; and A display device comprising a power voltage line disposed on the first semiconductor layer and electrically connected to the second connection portion of the first semiconductor layer.
  16. In Clause 15, the above power voltage line is, A horizontal power voltage line extending in the first direction and electrically connected to the second connection portion of the first semiconductor layer; and A display device comprising a vertical power voltage line extending in the second direction and electrically contacting the horizontal power voltage line.
  17. In paragraph 15, A display device characterized by including a second gate electrode disposed on the first semiconductor layer, wherein a portion of the second portion overlaps with the first portion of the first semiconductor layer to define a first light-emitting control transistor, and another portion overlaps with a portion of the second portion of the first semiconductor layer to define a second light-emitting control transistor.
  18. In Paragraph 17, A display device characterized in that the source region of the first light-emitting control transistor and the source region of the second light-emitting control transistor are the second connection portion of the first semiconductor layer.
  19. In Paragraph 17, A first hold capacitor lower electrode spaced apart from the second gate electrode and disposed in the first pixel region; A second hold capacitor lower electrode spaced apart from the second gate electrode and the first hold capacitor lower electrode, disposed in the second pixel region, and having a shape symmetric to the first hold capacitor lower electrode with respect to the boundary between the first pixel region and the second pixel region; and A display device characterized by including a hold capacitor upper electrode disposed on the first hold capacitor lower electrode and the second hold capacitor lower electrode, and comprising a first portion overlapping with the first hold capacitor lower electrode, a second portion overlapping with the second hold capacitor lower electrode, and a connecting portion connecting the first portion and the second portion.
  20. In Paragraph 19, A display device characterized by including a bridge electrode disposed on the upper electrode of the hold capacitor, electrically connecting the upper electrode of the hold capacitor and the second connection portion of the first semiconductor layer, and electrically connecting to the power supply voltage line.

Description

Display Device The present invention relates to a display device. More specifically, the present invention relates to a display device that displays high-resolution images. A display device may include pixels and can display an image by combining light emitted from the pixels. Generally, pixels can be placed within a limited display area of a display device. As the number of pixels placed in the display area increases, the resolution of the image displayed on the display device can increase. Therefore, in order to place as many pixels as possible in the display area, it is necessary to minimize the pixel area. Meanwhile, a pixel may include transistors for driving the pixel and signal lines that provide driving signals thereto. As the number of transistors and signal lines increases, the driving speed of the pixel may increase; however, as the area occupied by the transistors and signal lines within the pixel increases, the area of the pixel may relatively increase. FIG. 1 is a plan view illustrating a display device according to one embodiment of the present invention. Figure 2 is a circuit diagram of a pixel included in the display device of Figure 1. FIGS. 3 to 11 are drawings for explaining a first pixel and a second pixel included in the display device of FIG. 1. Figure 12 is a cross-sectional view taken along line II' of Figures 8 and 11. Figure 13 is a cross-sectional view taken along the line II-II' of Figures 8 and 11. Figure 14 is a cross-sectional view taken along the line III-III' of Figures 8 and 11. Figure 15 is a cross-sectional view taken along the line IV-IV' of Figures 8 and 11. Hereinafter, a display device according to embodiments of the present invention will be described in more detail with reference to the attached drawings. Identical or similar reference numerals are used for identical components in the attached drawings. FIG. 1 is a plan view illustrating a display device according to one embodiment of the present invention. Referring to FIG. 1, a display device (1000) according to one embodiment of the present invention may include a display area (DA) and a surrounding area (SA). Pixels may be placed in a display area (DA). The pixels may emit light. A display device (1000) may display an image by combining the light emitted from the pixels. The pixels may include a first pixel and a second pixel adjacent to the first pixel. The display area (DA) may include a first pixel area (PXA1) and a second pixel area (PXA2). The first pixel area (PXA1) and the second pixel area (PXA2) may be arranged alternately along a first direction (DR1) and a second direction (DR2) that intersects the first direction (DR1). The first pixel area (PXA1) may be an area where the first pixel is placed, and the second pixel area (PXA2) may be an area where the second pixel is placed. A plurality of signal lines may be arranged in the first pixel area (PXA1) and the second pixel area (PXA2). For example, in the first pixel area (PXA1) and the second pixel area (PXA2), a horizontal signal line (HL) extending in the first direction (DR1) and arranged in the second direction (DR2), and a vertical signal line (VL) extending in the second direction (DR2) and arranged in the first direction (DR1) may be arranged. The horizontal signal line (HL) and the vertical signal line (VL) can transmit driving signals to the first pixel and the second pixel. In one embodiment, the vertical signal line (VL) may include a first vertical signal line (VL1) and a second vertical signal line (VL2). Each of the first pixel and the second pixel may be electrically connected to a corresponding first vertical signal line (VL1). For example, the first pixel may be electrically connected to a first data line (e.g., DATA-1 in FIG. 11), and the second pixel may be electrically connected to a second data line (e.g., DATA-2 in FIG. 11). Alternatively, the first pixel and the second pixel may share a second vertical signal line (VL2). For example, the first pixel and the second pixel may share a bias voltage line (e.g., VBIAS in FIG. 11). As another example, the first pixel and the second pixel may share a reference voltage line (e.g., VREF in FIG. 11). As the first pixel and the second pixel share a second vertical signal line (VL2), the number of second vertical signal lines (VL2) required to drive the first pixel and the second pixel can be relatively reduced. Accordingly, the area occupied by the second vertical signal line (VL2) can be relatively reduced, so the resolution of the display device (1000) can be relatively increased. In one embodiment, a first pixel area (PXA1) and a second pixel area (PXA2) adjacent to the first pixel area (PXA1) may be surrounded by a valley area (VA). The valley area (VA) may be an area that mitigates impact caused by bending or deformation of the display device (1000). The peripheral area (SA) may be adjacent to at least one side of the display area (DA). A driving member for generating or transmitting th