Electrowetting printing ink filling method, filing device and filling apparatus

Abstract

The invention belongs to the technical field of electrowetting display, and provides an electrowetting printing ink filling method, filling device and filling apparatus. The filing method includes the steps of: S1. preparing a filling device having array type microneedles and a lower substrate having pixel grids; S2. filing an inner cavities of the microneedles with printing ink; S3. moving the filing device or lower substrate, and aligning the microneedles with the pixel grids; and S4. pressurizing the inner cavities of the microneedles to enable ink droplets to be formed at needle tips till the ink droplets drip from the microneedles into the pixel grids or the ink droplets are in contact with the lower substrate and adsorbed into the pixel grids. The filling device has an accommodating cavity and a microneedle array. The filing apparatus includes a filing device, a filling device travel mechanism, a workbench, a workbench travel mechanism and a distance measuring positioning module. The method adopts the filling device having the large-area microneedle array, can accurately control the volume of fluid in the microneedles, and realizes positioning of an ink layer and quantitative filling through rapid alignment simulated printing.

Description

technical field [0001] The present invention relates to the technical field of electrowetting display, in particular to an electrowetting display ink filling method, a filling device and a filling device. Background technique [0002] Electrowetting display has become one of the most promising display technologies in reflective display. The manufacture of electrowetting display screens is divided into several important steps such as substrate preparation, pixel wall preparation, ink filling and packaging, module integration and device testing. Among them, ink filling is one of the links with less research, slower speed and relatively imprecise control at this stage. Due to the strong hydrophobicity of the electrowetting substrate, how to fill non-polar ink materials quantitatively and quickly into each pixel and package them in time is one of the key links in the preparation of high-quality electrowetting display modules. one. [0003] The electrowetting display ink filli...

AI Technical Summary

Problems solved by technology

Neither of these two methods can accurately position and quantitatively fill the ink, and after filling, it is impossible to quantitatively control the amount of water layer used to seal the ink

[0004] The problem with traditional technology is that the filling process is slow and the accuracy is difficult to control, which is not conducive to the operation of high-quality and large-area substrates

For example, filling with the oil-water double interface method requires building a large water tank for large substrates, and filling and packaging underwater, which is complicated to operate; while using the method of filling first and then curing at low temperature, it is easy to fill too much ink, and it is easy to cause damage to the ink. Pollution and scratches on the pixel wall

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