Printing display-oriented printing height control system and method

Abstract

The invention provides a printing display-oriented printing height control system and method. The printing display-oriented printing height control system comprises a spray head lifting module, a substrate fixing module, a first sensor, a second sensor, a sensor controller and a motion driving controller; the spray head lifting module comprises a spray head, a spray head clamping device and a lifting mechanism; the substrate fixing module is arranged below the spray head lifting module and comprises an adsorption platform; the first sensor and the second sensor are used for detecting the real-time distance between a nozzle and a substrate and generating a first detection original signal and a second detection original signal; the sensor controller is used for acquiring the first detectionoriginal signal and the second detection original signal and sending the first detection original signal and the second detection original signal to the motion driving controller through signal processing and correction operation; and the motion driving controller is used for carrying out full-closed-loop control and driving on the lifting mechanism. According to the printing display-oriented printing height control system and method, the printing height control system and the two sensors are arranged in a combined mode, measured values of the multiple detected objects are corrected, the height or position relation is established, and non-contact self-adaptive printing height positioning control can be better achieved.

Description

technical field [0001] The invention belongs to the technical field related to inkjet printing, and more specifically relates to a printing height control system and method for printing display. Background technique [0002] At present, the new inkjet printing technology is widely used in the industrial manufacturing industry. In particular, with the OLED panel manufacturing cost reduction and efficiency requirements, compared with the evaporation process, the OLED panel manufacturing process using inkjet printing technology is to reduce production costs and increase A feasible method of efficiency, while the inkjet printing process is becoming more and more perfect, it is necessary to solve the problems of automation, precision control, and reliability of the inkjet printing system. Among them, due to the special structure of the piezoelectric nozzle, the nozzle surface of the nozzle is fragile, easy to be polluted and blocked, and the printing height detection and precise ...

AI Technical Summary

Problems solved by technology

In terms of process requirements, it is necessary to control the absolute distance from the nozzle surface of the nozzle to the panel substrate and adjust it accurately. When the panel substrate is mass-produced, it is necessary to ensure high printing consistency and high repeatability. If the printing height exceeds the allowable error, it will increase the ink drop point The impact of deviation, resulting in a decline in yield

[0003] There are two traditional printing height positioning methods: the striker detection positioning method and the non-contact measurement combined with the input substrate thickness positioning method. Among them, the striker detection method, the striker, the nozzle of the nozzle and the panel substrate will contact each other, and the nozzle of the nozzle and the panel substrate will have contact. Possibility of damage; laser displacement sensors are widely used in non-contact measurement. Although non-destructive measurement is solved, the thickness of the panel substrate needs to be known, which cannot meet the needs of automation and safety protection.

Both methods lack solutions for automatic measurement and positioning. Correspondingly, there is an urgent need to propose more appropriate solutions in this field to meet the current increasing technological requirements.

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