Transparent display apparatus

Patent metadata

Field	Value
Publication number	US-2025255148-A1
Application number	US-202418910813-A
Country	US
Kind code	A1
Filing date	Oct 9, 2024
Priority date	Feb 6, 2024
Publication date	Aug 7, 2025
Grant date	—

Abstract

A transparent display apparatus comprising: a substrate including a display area on which a plurality of pixels are disposed and a non-display area adjacent to the display area, the plurality of pixels each having a transmissive portion and a plurality of sub-pixels, and a plurality of dam areas disposed on the substrate, wherein each of the plurality of dam areas comprises: a first sub-dam surrounding a portion of the display area, and a second sub-dam disposed on the display area and connected to one side of the first sub-dam.

First claim

1 . A transparent display apparatus comprising:
a substrate including a display area and a non-display area adjacent to the display area; a plurality of pixels in the display area, the plurality of pixels each having a transmissive portion and a plurality of sub-pixels; and a plurality of dams disposed on the substrate, wherein the plurality of dams comprises:
a first sub-dam surrounding a portion of the display area, and
a second sub-dam disposed on the display area and connected to a first side of the first sub-dam.

2 . The transparent display apparatus of claim 1 , wherein the plurality of dams are provided in first to Nth dam areas on the substrate, N being a natural number greater than one, and
the transparent display apparatus further comprises: a space provided between the first dam areas to Nth dam areas.

3 . The transparent display apparatus of claim 2 , wherein the first sub-dam is disposed closer to the space than the second sub-dam.

4 . The transparent display apparatus of claim 1 , wherein the first sub-dam comprises a second side connected to a first edge of the first side, and a third side connected to a second edge of the first side and spaced apart from the second side, and
wherein the second sub-dam is connected to the second side and the third side, respectively.

5 . The transparent display apparatus of claim 4 , wherein the first side, a portion of the second side, and a portion of the third side of the first sub-dam and the second sub-dam is a closed loop.

6 . The transparent display apparatus of claim 1 , further comprising:
a buffer portion disposed between the first sub-dam and the second sub-dam.

7 . The transparent display apparatus of claim 6 , wherein the buffer portion is a vacuum.

8 . The transparent display apparatus of claim 6 , wherein each of the plurality of the sub-pixels comprise a light emission area disposed adjacent to the transmissive portion, and
wherein the buffer portion is disposed to overlap the light emission area.

9 . The transparent display apparatus of claim 6 , further comprising:
a planarization layer disposed on the substrate; and a plurality of inorganic film layers disposed between the substrate and the planarization layer, wherein the transmissive portion comprises an undercut portion where the planarization layer and the plurality of inorganic film layers are partially removed, and wherein the buffer portion is disposed along the undercut portion.

10 . The transparent display apparatus of claim 9 , wherein the undercut portion is one of a plurality of undercut portions provided in first to Mth undercut portions in the transmissive portion, M being a natural number greater than zero.

11 . The transparent display apparatus of claim 10 , further comprising:
a space provided between the plurality of dams, wherein the space is one of the plurality of undercut portions.

12 . The transparent display apparatus of claim 9 , wherein the plurality of inorganic film layers comprise:
a first passivation layer disposed between the substrate and the planarization layer; and a second passivation layer disposed between the first passivation layer and the planarization layer, and wherein the undercut portion comprises a blocking portion partially overlapping the planarization layer between the first passivation layer and the second passivation layer.

13 . The transparent display apparatus of claim 12 , wherein the substrate further comprises a gate line extended in one direction in the display area, and
wherein the blocking portion is disposed on the gate line.

14 . The transparent display apparatus of claim 1 , further comprising:
an opposing substrate disposed to face the substrate, the opposing substrate including a plurality of sub-pixels; a color filter disposed to correspond to each of the plurality of sub-pixels on the opposing substrate; and a plurality of upper organic layers covering the color filter of at least one sub-pixel among the plurality of the sub-pixels of the opposing substrate, wherein the plurality of upper organic layer are disposed to be spaced apart from each other with the transmissive portion interposed therebetween.

15 . The transparent display apparatus of claim 14 , further comprising a filling member adjacent to dam areas corresponding to the plurality of dams, the filling member disposed to fill a gap between the substrate and the opposing substrate.

16 . The transparent display apparatus of claim 1 , wherein each of the first sub-dam and the second sub-dam includes an absorbent material.

17 . The transparent display apparatus of claim 9 , wherein each of the plurality of pixels comprises:
an anode electrode disposed on the planarization layer; an organic light emitting layer disposed on the anode electrode; a cathode electrode disposed on the organic light emitting layer; and an encapsulation layer disposed on the cathode electrode, and wherein the organic light emitting layer is discontinuous at the undercut portion.

18 . The transparent display apparatus of claim 6 , wherein the buffer portion is disposed to overlap at least a portion of the transmissive portion.

19 . The transparent display apparatus of claim 18 , wherein each of the plurality of pixels comprises:
a plurality of inorganic film layers disposed on the substrate; an organic light emitting layer disposed on the plurality of the inorganic film layers; a cathode electrode disposed on the organic light emitting layer; and an encapsulation layer on the cathode electrode, and wherein the buffer portion comprises a pattern portion in which the plurality of inorganic film layers, the organic light emitting layer, the cathode electrode and the encapsulation layer are partially removed.

20 . The transparent display apparatus of claim 18 , wherein each of the plurality of pixels comprises:
an organic light emitting layer disposed on the substrate; a cathode electrode disposed on the organic light emitting layer; and an encapsulation layer disposed on the cathode electrode, and wherein the buffer portion comprises a pattern portion in which the organic light emitting layer, the cathode electrode and the encapsulation layer are partially removed.

21 . The transparent display apparatus of claim 18 , wherein each of the plurality of pixels comprises:
a buffer layer disposed on the substrate; an organic light emitting layer disposed over the buffer layer; a cathode electrode disposed on the organic light emitting layer; and an encapsulation layer disposed on the cathode electrode, and wherein the buffer portion comprises a pattern portion in which the buffer layer, the organic light emitting layer, the cathode electrode and the encapsulation layer are partially removed.

22 . A transparent display apparatus comprising:
a substrate including a display area and a non-display area adjacent to the display area; a plurality of pixels disposed in the display area, the plurality of pixels each having a transmissive portion and a plurality of sub-pixels; a plurality of dams surrounding the display area; and a buffer portion disposed inside an area of the substrate surrounded by the dams.

23 . The transparent display apparatus of claim 22 , wherein the dams comprise:
a first sub-dam surrounding the display area; and a second sub-dam disposed to be spaced apart from a first side of the first sub-dam inside an area of the display a

Assignees

• Lg Display Co Ltd

Inventors

• Song Jihun
• Kim Jongsung
• Yohn Gyujae

Classifications

• H10K59/873 Primary

  Encapsulations · CPC title

• H10K59/124 Primary

  Insulating layers formed between TFT elements and OLED elements · CPC title

• H10K59/874

  including getter material or desiccant · CPC title

• H10K59/8722 Primary

  Peripheral sealing arrangements, e.g. adhesives, sealants · CPC title