Method for manufacturing organic electroluminescent display panel, and device for manufacturing organic electroluminescent display panel

A technology of a display panel and a manufacturing method, which is applied in the directions of identification devices, lighting devices, semiconductor/solid-state device manufacturing, etc., can solve the problems of complex control of inkjet devices and the like

Active Publication Date: 2013-04-03
JOLED INC
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there is a problem that if all the nozzles of the inkjet head are required to generate the

Method used

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  • Method for manufacturing organic electroluminescent display panel, and device for manufacturing organic electroluminescent display panel
  • Method for manufacturing organic electroluminescent display panel, and device for manufacturing organic electroluminescent display panel
  • Method for manufacturing organic electroluminescent display panel, and device for manufacturing organic electroluminescent display panel

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Experimental program
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Effect test

Embodiment approach 1

[0049] [the whole frame]

[0050] figure 1 It is a partial cross-sectional view showing the structure of the organic EL display panel 100 according to the first embodiment. The organic EL display panel 100 is a so-called top emission type in which the upper side in the figure is defined as a display surface.

[0051] like figure 1 As shown, a TFT layer 2 , a power supply electrode 3 , a planarization film 4 , a pixel electrode 6 , and a hole injection layer 9 are sequentially stacked on a substrate (EL substrate) 1 . On the hole injection layer 9 , the partition wall layer 7 is provided with a plurality of openings 17 serving as formation regions of the organic light emitting layer 11 . Inside the opening 17 , the hole transport layer 10 , the organic light-emitting layer 11 , the electron transport layer 12 , the electron injection layer 13 , and the counter electrode 14 are laminated in this order.

[0052]

[0053] The substrate 1 is a rear substrate of the organic EL...

Embodiment approach 2

[0219] Figure 18 It is a diagram showing the control flow of the ejection frequency control unit in the step of selecting nozzles for ejecting liquid droplets according to the second embodiment.

[0220] Figure 18 Steps S901, S902, S904-S906, S908-S911 in the Figure 9 S201, S202, S204~S206, S208~S211 in the corresponding. and Figure 9 The difference is that S912A and S913A are provided.

[0221] In this embodiment, when the judgment is N A When ×T is less than the necessary number of discharges N (droplets equal to or greater than the target value cannot be discharged only by the A-class nozzle) (No in step S902), it is determined whether the maximum number of discharges T can be further increased (step S912A). The maximum number of discharges T can be increased by changing the waveform of the drive voltage applied to the piezoelectric element to increase the discharge frequency, or by reducing the scanning speed of the inkjet head.

[0222] When it is determined tha...

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Abstract

A method for manufacturing an organic electroluminescent display panel with which it is possible to uniform the total volume of droplets discharged to openings by a simple control is provided. The method comprises: a first step for preparing an electroluminescent substrate in which openings (17) are formed, and a head unit (301), upon which is disposed a plurality of nozzles (3030); a second step for detecting, for every nozzle, the volume of droplets discharged per instance from each nozzle (3030); a third step for dividing the nozzles (3030) into nozzle groups (a1, a2, a3, a4) with a 1-to-1 correspondence to the openings (17) and determining, for every nozzle, the number of instances of discharging the droplets by the nozzle (3030), on the basis of the dispersion of the volume of droplets detected for every nozzle at the second step, so that the total volume of droplets discharged to the openings (17) is within a reference range for every nozzle group (a1, a2, a3, a4); and a fourth step for discharging droplets corresponding to the number of instances of discharge determined for every nozzle at the third step from the nozzles (3030) that belong to the nozzle groups corresponding to the openings (17), while scanning the head unit (301) in the row direction.

Description

technical field [0001] The present invention relates to a method for manufacturing an organic EL display panel including an organic EL element, and an apparatus for manufacturing an organic EL display panel. Background technique [0002] In recent years, an organic EL display panel in which an organic EL element is arranged on a substrate has become widespread as a display device. The organic EL display panel has features such as high visibility because it uses an organic EL element that emits light by itself, and excellent impact resistance because it is a completely solid element. [0003] The organic EL element is a current-driven light-emitting element, and is constituted by laminating an organic light-emitting layer or the like that performs an electroluminescent phenomenon by carrier recombination (recombination) between an electrode pair of an anode and a cathode. In addition, in the organic EL display panel, the organic EL elements corresponding to the respective co...

Claims

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Application Information

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IPC IPC(8): H05B33/10G09F9/30H01L27/32H01L51/50H05B33/12
CPCH05B33/10H01L2227/323H01L27/3244H01L51/0005H10K71/135H10K59/1201H10K59/12
Inventor 竹内孝之
Owner JOLED INC
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