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Electroluminescent display device

A technology of electroluminescent display and light-emitting layer, which is applied in the direction of circuits, electrical components, electric solid-state devices, etc., and can solve the problems of increasing manufacturing costs

Pending Publication Date: 2022-06-03
LG DISPLAY CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] However, the evaporation process increases the manufacturing cost due to the preparation of the mask, and has problems when applied to large-sized and high-definition display devices due to the manufacturing variation of the mask, sag, shadow effect, etc.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

no. 1 approach -

[0059] image 3 is a schematic cross-sectional view of an electroluminescent display device according to a first embodiment of the present disclosure. image 3 corresponds to figure 2 line I-I', and shows a pixel area.

[0060] exist image 3 Among them, the buffer layer 120 is formed on substantially the entire surface of the substrate 100 . The substrate 100 may be a glass substrate or a plastic substrate. For example, polyimide may be used for the plastic substrate, but is not limited thereto.

[0061] The buffer layer 120 may be made of, for example, silicon oxide (SiO 2 ) or an inorganic insulating material of silicon nitride (SiNx), and may be formed as a single layer or multiple layers.

[0062] A first gate electrode 122 , a second gate electrode 124 , a capacitor electrode 126 , and a first auxiliary electrode 128 of a conductive material such as metal are formed on the buffer layer 120 .

[0063] The first gate electrode 122 , the second gate electrode 124 , ...

no. 2 approach -

[0189] Figure 7 and Figure 8 corresponding to image 3 A schematic enlarged plan view and a schematic enlarged cross-sectional view of the area A1 of . Figure 7 is a top view showing the planar structure of the auxiliary pattern in the electroluminescence display device according to the second embodiment of the present disclosure, Figure 8 is corresponding to Figure 7 A cross-sectional view of the line III-III'. The electroluminescent display device according to the second embodiment of the present disclosure has substantially the same configuration as the electroluminescent display device of the first embodiment except for the auxiliary patterns. The same parts as those of the first embodiment are denoted by the same reference numerals, and the description of the same parts will be shortened or omitted.

[0190] exist Figure 7 and Figure 8 , the second charge auxiliary layer 186 is formed between the connection pattern 162 and the second electrode 190 , correspo...

no. 3 approach -

[0202] Figure 9 and Figure 10 corresponding to image 3 A schematic enlarged plan view and a schematic enlarged cross-sectional view of the area A1 of . Figure 9 is a top view showing the planar structure of the auxiliary pattern in the electroluminescence display device according to the second embodiment of the present disclosure, Figure 10 is corresponding to Figure 9 A cross-sectional view of the line IV-IV'. The electroluminescent display device according to the third embodiment of the present disclosure has substantially the same configuration as the electroluminescent display device of the first embodiment except for the auxiliary patterns. The same parts as those of the first embodiment are denoted by the same reference numerals, and the description of the same parts will be shortened or omitted.

[0203] exist Figure 9 and Figure 10 , the second charge auxiliary layer 186 is formed between the connection pattern 162 and the second electrode 190 , correspo...

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Abstract

An electroluminescent display device includes: a substrate; a first electrode on the substrate; a connection pattern on the substrate and formed of the same material as the first electrode; a bank covering edges of the first electrode and the connection pattern; a light emitting layer on the first electrode; a second electrode on the light emitting layer, the bank, and the connection pattern; and an auxiliary pattern between the second electrode and the connection pattern, in which a side surface of the auxiliary pattern has a larger inclination angle than a side surface of the bank.

Description

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS [0002] This application claims priority to and the benefit of Korean Patent Application No. 10-2020-0164873 filed on Nov. 30, 2020, the entire contents of which are incorporated herein by reference. technical field [0003] The present disclosure relates to an electroluminescent display device, and more particularly, to an electroluminescent display device having a large size and high definition. Background technique [0004] As one of the flat panel display devices, the electroluminescent display device has a wide viewing angle compared to the liquid crystal display device because the electroluminescent display device is self-luminous, and also has a thin thickness, light weight, and The advantage of low power consumption. [0005] In addition, the electroluminescent display device is driven by a low voltage of direct current (DC) and has a fast response time. In addition, the electroluminescence display device is highly re...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01L27/32H01L51/52
CPCH10K59/353H10K59/35H10K59/1315H10K59/12H10K50/824H10K59/122H10K59/131H10K50/814H10K71/00H10K59/123H10K50/171H10K50/16H10K50/82
Inventor 李学旻金禧镇
Owner LG DISPLAY CO LTD
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