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Electroluminescent display device

By introducing low-refractive-index partition walls into electroluminescent display devices, the problems of color mixing and low light extraction efficiency at high resolution are solved, and more efficient light output and area increase are achieved.

Active Publication Date: 2019-06-28
LG DISPLAY CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] Recently, as the size of substrates has increased and display devices have been developed to have high resolution, the pixel pitch has decreased and color mixing has become a problem

Method used

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Examples

Experimental program
Comparison scheme
Effect test

no. 1 example

[0022] figure 1 is a circuit diagram showing a single pixel region of the electroluminescent display device according to the present disclosure.

[0023] Such as figure 1 As shown, the electroluminescent display device according to the embodiment of the present disclosure includes a gate line GL, a data line DL, a switching thin film transistor Ts, a driving thin film transistor Td, a storage capacitor Cst, and a light emitting diode D. The gate lines GL and the data lines DL cross each other to define the pixel area SP. A switching thin film transistor Ts, a driving thin film transistor Td, a storage capacitor Cst, and a light emitting diode D are formed in the pixel region SP.

[0024] More specifically, the gate of the switching thin film transistor Ts is connected to the gate line GL, and the source of the switching thin film transistor Ts is connected to the data line DL. The gate of the driving thin film transistor Td is connected to the drain of the switching thin fi...

no. 2 example

[0134] Hereinafter, detailed descriptions of the same or similar configurations as those of the first embodiment may be omitted.

[0135] Figure 4 is a cross-sectional view schematically showing an electroluminescence display device according to a second embodiment of the present disclosure.

[0136] Such as Figure 4 As shown, the electroluminescent display device 200 according to the embodiment of the present disclosure may include: a substrate 210; thin film transistors Td1, Td2 and Td3 and light emitting diodes disposed on the substrate 210 and respectively formed in the pixel regions SP1, SP2 and SP3 D1 , D2 and D3 ; the encapsulation layer 270 disposed on the light emitting diodes D1 , D2 and D3 ; and the color filter layer 280 disposed on the encapsulation layer 270 .

[0137] That is, the thin film transistors Td1, Td2 and Td3 and the light emitting diodes D1, D2 and D3 may be formed on the substrate 210 and respectively formed in the pixel regions SP1, SP2 and SP3,...

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PUM

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Abstract

An electroluminescent display device includes a substrate including a plurality of pixel regions; a plurality of light emitting diodes spaced apart from each other on the substrate and corresponding to the plurality of pixel regions, respectively; encapsulation films respectively covering the plurality of light emitting diodes and having a first refractive index; a first partition wall disposed between the encapsulation films corresponding to a boundary between the plurality of pixel regions and having a second refractive index lower than the first refractive index; and a color filter layer disposed on the encapsulation films and the first partition wall, wherein the color filter layer includes a plurality of color filter patterns having a third refractive index and a second partition walldisposed between the plurality of color filter patterns and having a fourth refractive index lower than the third refractive index.

Description

[0001] Cross References to Related Applications [0002] This application claims the benefit of Korean Patent Application No. 10-2017-0166006 filed with the Korean Intellectual Property Office on December 5, 2017, the entire contents of which are incorporated herein by reference. technical field [0003] The present disclosure relates to an electroluminescence display device, and more particularly, to an electroluminescence display device in which a partition wall having a low refractive index is provided so that light extraction efficiency is improved and Color mixing is prevented. Background technique [0004] In recent years, flat panel displays having excellent characteristics such as being thinner, lighter, and having low power consumption have been widely developed and applied to various fields. [0005] Among flat panel displays, an electroluminescence display device is a device in which charge carriers are injected into a light emitting layer formed between a cathod...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01L27/32H01L51/52
CPCH10K59/38H10K59/12H10K59/878H10K59/8731H10K59/879H10K59/8052H10K59/124H10K50/11H10K50/81H10K50/82H10K50/856H10K50/858H10K50/8445H10K59/35H10K50/854
Owner LG DISPLAY CO LTD