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Organic EL display panel and manufacturing method therefor

A luminescent and display technology, applied in electroluminescent light sources, electric light sources, semiconductor/solid-state device manufacturing, etc., can solve problems such as uneven drying and insufficient technology, and achieve the effect of improving yield

Inactive Publication Date: 2013-02-27
JOLED INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0032] However, the techniques disclosed in JP-A-2009-54395 and JP-A-2009-48830 are not sufficient to solve the problem caused by uneven drying.

Method used

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  • Organic EL display panel and manufacturing method therefor
  • Organic EL display panel and manufacturing method therefor
  • Organic EL display panel and manufacturing method therefor

Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach 1

[0172] In this embodiment, an example will be described in which the length of the edge application region (the length in the long-axis direction of the color development region) is longer than the length of the central application region among all the color development regions. That is, in Embodiment 1, an example is described in which the number of pixel electrodes included in the edge coated region is greater than the number of pixel electrodes included in the central coated region.

[0173] Figure 13 It is a display panel (TFT substrate) in which a counter electrode is removed from the organic EL display panel of this embodiment. in addition, Figure 13 also from Figure 10 The display screen after removing the organic functional layer 111 in the display screen (TFT substrate).

[0174] Such as Figure 13 As shown, the TFT substrate 100 of this embodiment includes: a substrate 101 , banks 107 and pixel electrodes 109 .

[0175] The substrate 101 has color-emitting re...

Embodiment approach 2

[0181] In Embodiment 1, an example in which the length of the end application region is longer than the length of the central application region has been described. In Embodiment 2, an example in which the lengths of the respective application regions are the same in all the color developing regions and the width of the application regions at the ends is larger than the width of the application regions in the center will be described. That is, in Embodiment 2, an example in which the number of pixel electrodes included in each application region is the same will be described.

[0182] Figure 14 It is a display panel (TFT substrate) in which a counter electrode and an organic functional layer are removed from the organic EL display panel of this embodiment.

[0183] Such as Figure 14 As shown, the TFT substrate 200 of this embodiment includes: a substrate 101 , banks 107 and pixel electrodes 109 .

[0184] The substrate 101 has color-emitting regions 103 arranged along the...

Embodiment approach 3

[0191] In Embodiment 3, the organic EL display panel of the present invention in which the taper angle of the banks differs depending on the position on the organic EL display panel will be described.

[0192] Figure 15 It is a plan view of the display panel (TFT substrate) in which the counter electrode and the organic functional layer are removed from the organic EL display panel 300 of the third embodiment. Figure 16 yes Figure 15 An enlarged view of the area enclosed by the quadrilateral α.

[0193] Figure 17A yes Figure 16 A cross-sectional view at line AA of the organic EL display panel 300 shown. That is to say, Figure 17A A cross-sectional view of the bank 107 for defining the central application region 105Y is shown. Figure 17B yes Figure 16 A cross-sectional view of the organic EL display panel 300 shown at line BB. Figure 17C yes Figure 16 A cross-sectional view at line CC of the organic EL display panel 300 shown. That is to say, Figure 17C A ...

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Abstract

An organic EL display panel is provided which includes: a substrate which includes a plurality of luminescent regions which are arranged side by side in a specific direction and run in parallel to one another; a bank formed over the substrate, the bank defining a plurality of coating regions in each of the luminescent regions, the coating regions being aligned in a row along the long axis of the luminescent region; and a pixel electrode provided in each of the coating regions, the pixel electrode having a long axis which is in parallel with the long axis of the luminescent region, wherein, in each of the luminescent regions, the coating region positioned at a lengthwise end of the luminescent region is larger in size than the coating region positioned at a lengthwise center of the luminescent region.

Description

technical field [0001] The present invention relates to an organic EL (Electroluminescent: electroluminescence) display screen and a manufacturing method thereof. Background technique [0002] The manufacturing method of the organic EL display can be roughly classified into the following two types according to the method of forming the organic functional layer. One is a method of forming an organic functional layer by evaporation, and the other is a method of forming an organic functional layer by a solvent coating method. [0003] As one of representative methods of forming an organic functional layer by a solvent coating method, there is a method in which an inkjet device is used to drop droplets of ink containing an organic functional material onto a display substrate to form an organic functional layer (for example, refer to Patent Document 1). [0004] An ink containing an organic functional material is applied to a color-emitting region disposed on a display substrat...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01L51/50H05B33/12G09F9/00G09F9/30H01L27/32H05B33/02H05B33/10H05B33/22H05B33/26
CPCH05B33/10H01L27/3281H01L27/3246H01L51/0005H01L27/326H10K59/121H10K59/122H10K59/17H10K71/135
Inventor 吉田英博奥本健二山室景成
Owner JOLED INC