Electrowetting display unit on PCB (Printed Circuit Board) and preparation method of electrowetting display unit on PCB

Abstract

The invention discloses an electrowetting display unit which is prepared by taking a PCB (Printed Circuit Board) as a substrate and a preparation method of the electrowetting display unit, and meanwhile provides a large-size outdoor display screen technology, wherein the PCB is adopted as the substrate, an electrowetting display unit array is prepared on the PCB, integral control is carried out on pixels in each unit by impressed voltage, each unit is separately controlled by the impressed voltage, each PCB with the display array is used as a splicing unit, and a large-size outdoor display screen is formed by splicing the splicing units. The wiring and assembling errors are greatly reduced by the PCBs, and the automation level and the production labor efficiency are improved. The PCBs are adopted as the substrates of the electrowetting display units, a bottom electrode is directly provided, and a lead used for directly driving the pixels can be led out from the inner layer through utilizing a multi-layer PCB manufacturing technology. The large-size outdoor display screen which is spliced by the display unit arrays based on the PCBs can greatly reduce the energy consumption of the current outdoor LED screen. In addition, the cost is low as the PCBs are adopted.

Description

technical field [0001] The invention belongs to the technical field of PCB boards, and in particular relates to an electrowetting display unit on a PCB board and a preparation method thereof. Background technique [0002] Electrowetting refers to changing the wettability of the droplet on the substrate by changing the voltage between the droplet and the insulating substrate, that is, changing the contact angle to cause the droplet to deform and displace. The liquid can spread on the solid surface, and the solid-liquid contact surface tends to expand, that is, the adhesion force of the liquid to the solid surface is greater than its cohesive force, which is wetting. The liquid cannot spread on the solid surface, and the contact surface tends to shrink into a spherical shape, that is, it is not wet, and the non-wet means that the adhesion force of the liquid to the solid surface is less than its cohesive force. [0003] The current outdoor advertising screens mainly use LED s...

AI Technical Summary

Problems solved by technology

[0005] The purpose of the embodiment of the present invention is to provide a method for preparing an electrowetting display unit on a PCB, aiming at solving the problem of lack of technology for using a PCB board as a unit base material at present

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