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OLED ink-jet printing method and device

An inkjet printing device and inkjet printing technology, applied in the field of OLED printing, can solve the problems of very demanding processor processing capacity, extremely high camera resolution requirements, and long information processing time, so as to avoid missed detection, The effect of convenient calculation and less variables

Inactive Publication Date: 2020-02-07
肇庆皈一智能科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, by means of image detection, because the ink drop volume of OLED printing is very small, not only the resolution of the camera is extremely high, but also the amount of data that needs to be processed is also huge, and the processing capability of the processor is very demanding. The information processing time is long, so when judging whether the nozzle is clogged, it is necessary to slow down the printing speed to cooperate, and the printing speed will be greatly limited

Method used

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  • OLED ink-jet printing method and device
  • OLED ink-jet printing method and device
  • OLED ink-jet printing method and device

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Experimental program
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Effect test

Embodiment 1

[0031] The specific embodiment of the present invention is as Figure 1-4 As shown, an OLED inkjet printing method, when a plurality of nozzles 3 arranged in a single row and reciprocating along a straight line spray ink to an OLED substrate 9, the ink droplets 9 of the main nozzles 4 located on the nozzles 3 are detected by laser scanning Check whether it is dripping normally, and use the re-spray nozzle 5 on the nozzle 3 to immediately re-spray the missing or less sprayed part of the OLED substrate 9 .

[0032] During laser scanning, the direction of the laser light irradiated on the ink droplet 9 is perpendicular to the drop direction of the ink droplet 9 . The arrangement direction of the laser corresponds to the arrangement direction of each main nozzle 4 , and the irradiation height of the laser corresponds to the ink droplet 9 on the main nozzle 4 in the initial stage of dropping. The laser emitting end and receiving end of the laser move synchronously with the single ...

Embodiment 2

[0040] Such as Figure 5 As shown, the difference from Embodiment 1 is that the laser scanning device 6 includes a laser transmitter receiver 61 and a reflective mirror 62 sequentially arranged along the optical path. The laser transmitter receiver 61 is fixedly connected with the reflector 62 . The laser emitting end of the laser emitting receiver 61 faces downward. The reflector 62 is located below the laser emitting end of the laser emitting receiver 61 and is arranged obliquely relative thereto. In this embodiment, the laser emitting end of the laser transmitting receiver 61 is vertically downward, and the inclination angle of the reflecting mirror 62 relative to the horizontal plane is 45°. The laser light reflected by the mirror 62 is irradiated in the horizontal direction.

[0041] In addition to the above embodiments, the main nozzle 4 and the supplementary spray nozzle 5 can also be respectively arranged on two different spray heads 3 .

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Abstract

The invention discloses an OLED ink-jet printing method and device. The method comprises the steps that when a plurality of sprayers which are arranged in a single row and reciprocate linearly conductink jetting on an OLED substrate, through laser scanning, whether or not ink droplets of main nozzles of the sprayers normally drip is detected, and through supplementary jetting nozzles of the sprayers, the part, suffering from missing jetting and less jetting, on the OLED substrate is subjected to real-time supplementary jetting. The device comprises a placement platform, a sliding base, a guide rail and a driving mechanism, and the sprayers are arranged on the sliding base and located above the placement platform; each sprayer is connected with a main nozzle located at a front position anda supplementary jetting nozzle located at the rear position; the OLED ink-jet printing device furthermore comprises laser scanning devices, and the laser scanning device and the sprayers are all connected with a control device. By means of the OLED ink-jet printing method and device, a large-sized OLED panel can be subjected to jet printing, falling points of the jetted liquid droplets can be accurately elevated, so that the positioning precision reaches + / - 0.5 micrometer, and the jet printing yield of the OLED panel can also reach 97% or above.

Description

technical field [0001] The invention relates to the technical field of OLED inkjet printing, in particular to an OLED inkjet printing method and device. Background technique [0002] The OLED printing technology mainly uses solvents to melt OLED organic materials, and then directly prints the materials on the surface of the substrate to form R (red), G (green), and B (blue) organic light-emitting layers. OLED printing equipment can be divided into two categories from the arrangement and movement of the nozzle: single pass and multi pass. Among them, the single-pass jet printing equipment means that multiple nozzles are arranged in a row along the X axis and move along the Y axis at the same time. However, due to the current failure to solve the leaking problem of the single-pass printing equipment nozzle, the qualified rate of OLED panels after printing is only about 70%, which is relatively low. Therefore, the popularity of single-pass printing equipment is low. The mult...

Claims

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Application Information

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IPC IPC(8): B41J2/165B41J3/407B41J3/54B41J2/12B41J2/125B41J2/11H01L51/56
CPCB41J2/16579B41J3/407B41J3/543B41J2/12B41J2/125B41J2/11H10K71/135H10K71/00B41J2/2142B41J2/2139H10K59/1201
Inventor 王仁亮闫焉服赵海潮王秀红张细锄
Owner 肇庆皈一智能科技有限公司
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