USRE50651EActiveUtility

Electro-luminescence display apparatus

76
Assignee: LG DISPLAY CO LTDPriority: Nov 19, 2018Filed: Aug 30, 2023Granted: Oct 28, 2025
Est. expiryNov 19, 2038(~12.4 yrs left)· nominal 20-yr term from priority
Inventors:Harkjin KimHoyoung JeongShin-Bok Lee
H10K 2102/311H10K 59/123H10K 59/131H10K 59/8051G02B 1/113H10K 59/122H10K 59/8792H10K 50/8426H10K 50/85H10K 50/865H10K 50/84H10K 59/8722H10K 59/87H10K 59/80524H10H 29/142H10K 2102/103H10K 59/126H10K 50/125H10K 59/124H10K 59/873H10D 30/6755G09F 9/301H10K 77/111H10K 59/1213Y02E10/549H10K 2102/3031H10K 59/875H10K 50/115
76
PatentIndex Score
0
Cited by
34
References
32
Claims

Abstract

An electro-luminescence display apparatus comprises a transparent substrate; a thin-film transistor array disposed on the transparent substrate; a first electrode disposed on the thin-film transistor array; an electro-luminescence diode disposed on the first electrode; a second electrode disposed on the electro-luminescence diode; an encapsulation unit disposed on the second electrode; and an external light-absorbing layer disposed on the encapsulation unit and absorbing external light that passes through the transparent substrate.

Claims

exact text as granted — not AI-modified
What is claimed is: 
     
       1. An electro-luminescence display apparatus, comprising:
 a transparent substrate; 
 a thin-film transistor array disposed on the transparent substrate; 
 a first electrode disposed on the thin-film transistor array; 
 an electro-luminescence diode disposed on the first electrode; 
 a second electrode disposed on the electro-luminescence diode; 
 an encapsulation unit disposed on the second electrode; and 
 an external light-absorbing layer disposed on the encapsulation unit and absorbing external light that passes through the transparent substrate; and 
 a black bank disposed on the first electrode and configured to have an opened area, 
 wherein the external light-absorbing layer has a shape matching a shape of the second electrode. 
 
     
     
       2. The electro-luminescence display apparatus of  claim 1 , wherein the external light-absorbing layer includes at least one of pigment black, black resin, graphite, gravure ink, black spray, black enamel, chromium and low reflective metal. 
     
     
       3. The electro-luminescence display apparatus of  claim 1 , wherein the electro-luminescence diode is configured to emit first light toward the first electrode and to emit second light toward the second electrode, and the second light is absorbed by the external light-absorbing layer. 
     
     
       4. The electro-luminescence display apparatus of  claim 3 , wherein at least 80% of the second light is absorbed by the external light-absorbing layer. 
     
     
       5. The electro-luminescence display apparatus of  claim 1 , further comprising:
 an adhesive layer disposed on the external light-absorbing layer; and 
 a second substrate disposed on the adhesive layer. 
 
     
     
       6. The electro-luminescence display apparatus of  claim 5 , wherein the second substrate includes an opaque metal. 
     
     
       7. The electro-luminescence display apparatus of  claim 1 , wherein the first electrode has at least 80% of visible light transmittance. 
     
     
       8. The electro-luminescence display apparatus of  claim 1 , wherein the second electrode has at least 80% of visible light transmittance. 
     
     
       9. The electro-luminescence display apparatus of  claim 1 , wherein a rear surface of the transparent substrate is directly exposed to external light. 
     
     
       10. The electro-luminescence display apparatus of  claim 9 , wherein the external light reflectance of a display area of the electro-luminescence display apparatus is not higher than 5%. 
     
     
       11. The electro-luminescence display apparatus of  claim 1 , further comprising a wherein the black bank disposed on the first electrode and overlapping overlaps an edge of the first electrode,
 wherein the black bank is configured to absorb at least 80% of visible light. 
 
     
     
       12. The electro-luminescence display apparatus of  claim 1 , further comprising an additional light-absorbing layer is a disposed on a rear surface of at least one of a first metallic layer and a second metallic layer of the thin-film transistor array. 
     
     
       13. The electro-luminescence display apparatus of  claim 12 , further comprising a phase-correction layer disposed between at least one of the first and second metallic layers and the additional light-absorbing layer. 
     
     
       14. The electro-luminescence display apparatus of  claim 13 , wherein the phase-correction layer includes at least one of silicon nitride, IGZO, and ITO. 
     
     
       15. The electro-luminescence display apparatus of  claim 12 , wherein the additional light-absorbing layer includes one of copper oxide, nickel oxide, molybdenum oxide, and oxide of an alloy that includes at least two of copper/nickel/molybdenum. 
     
     
       16. An electro-luminescence display apparatus, comprising:
 a thin-film transistor array disposed on a transparent substrate; 
 a first electrode disposed on the thin-film transistor array; 
 an electro-luminescence diode disposed on the thin-film transistor array; 
 a second electrode disposed on the electro-luminescence diode; and 
 an encapsulation unit disposed on the second electrode; and 
 an external light-absorbing layer that is placed on the second electrode and configured to absorb external light which passes through the transparent substrate, the first electrode, the electro-luminescence diode and the second electrode, and improving an ambient light contrast ratio, 
 wherein the external light-absorbing layer has a shape matching a shape of the second electrode. 
 
     
     
       17. The electro-luminescence display apparatus of  claim 16 , wherein the transparent substrate is configured to display an image through a rear surface thereof. 
     
     
       18. The electro-luminescence display apparatus of  claim 16 , further comprising an additional encapsulation unit on the external light-absorbing layer. 
     
     
       19. The electro-luminescence display apparatus of  claim 16 , wherein a rear surface of the transparent substrate is exposed to air. 
     
     
       20. The electro-luminescence display apparatus of  claim 16 , wherein a rear surface of the transparent substrate is covered by an anti-reflection coating. 
     
     
       21. The electro-luminescence display apparatus of  claim 1 , wherein the transparent substrate is foldable.  
     
     
       22. The electro-luminescence display apparatus of  claim 1 , wherein the black bank includes at least one or more of pigment black, black resins, graphite, black ink, gravure ink, black spray, and black enamel.  
     
     
       23. The electro-luminescence display apparatus of  claim 1 , further comprising an organic layer disposed on the thin-film transistor array,
 wherein the organic layer includes a contact hole to connect the first electrode to the thin-film transistor array, and the black bank fills the contact hole.    
     
     
       24. The electro-luminescence display apparatus of  claim 1 , wherein the electro-luminescence display apparatus does not include a polarizing plate.  
     
     
       25. The electro-luminescence display apparatus of  claim 1 , further comprising an anti-reflection coating.  
     
     
       26. The electro-luminescence display apparatus of  claim 16 , wherein the transparent substrate is foldable.  
     
     
       27. The electro-luminescence display apparatus of  claim 16 , further comprising a black bank disposed on the first electrode and configured to have an opened area.  
     
     
       28. The electro-luminescence display apparatus of  claim 27 , wherein the black bank includes at least one or more of pigment black, black resins, graphite, black ink, gravure ink, black spray, and black enamel.  
     
     
       29. The electro-luminescence display apparatus of  claim 27 , further comprising an organic layer disposed on the thin-film transistor array,
 wherein the organic layer includes a contact hole to connect the first electrode to the thin-film transistor array, and the black bank fills the contact hole.    
     
     
       30. The electro-luminescence display apparatus of  claim 16 , further comprising a color filter disposed on the substrate.  
     
     
       31. The electro-luminescence display apparatus of  claim 30 , wherein the electro-luminescence display apparatus does not include a polarizing plate.  
     
     
       32. The electro-luminescence display apparatus of  claim 16 , further comprising an anti-reflection coating.

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