Coating device and coating method for optical cement

Abstract

The invention provides a coating device for optical cement, which comprises a tray for bearing a conductive layer, a driving device arranged below the tray and used for driving the tray to rotate, and a vacuum tank arranged below the tray and used for forming negative pressure to adsorb the conductive layer on the tray, wherein the tray comprises a circular bearing part for bearing the conductivelayer and an edge part connected on the periphery of the circular bearing part, and the circular bearing part is provided with a vacuum passage; the vacuum tank comprises a circular shell and a bottom wall connected at the bottom of the circular shell; and a rotating shaft of the driving device passes through the bottom wall and is connected with the tray, the top end of the circular shell is rotationally and hermetically connected with the tray, and the vacuum passage is communicated with the vacuum tank. The coating device provided by the invention can realize automatic coating of the conductive layer, is favorable for realizing continuous and stable production of the coating process, and improves the production efficiency. Moreover, the liquid optical cement can avoid bubbles during rotary coating, and is favorable for improving the yield of a product.

Description

technical field [0001] The invention relates to the production of touch screens, in particular to a glue coating device and a glue coating method for optical glue. Background technique [0002] With the high performance and diversified development of various electronic devices such as mobile phones and touch navigation systems, it has become a common technology for these electronic devices to install light-transmitting touch panels in front of display elements such as liquid crystals. Through the touch screen, the user visually confirms the display content of the display element located on the back of the touch screen, and presses the touch screen with a finger or a pen to perform operations to realize various functions of the electronic device. [0003] According to different working principles and transmission media of touch screens, existing touch screens are divided into five types: resistive, surface capacitive, projected capacitive, surface acoustic wave, and infrared....

AI Technical Summary

Problems solved by technology

[0006] The existing gluing method mainly has the following disadvantages: 1. The above processes generally adopt manual operation, so it is related to the proficiency of the workers and affects the gluing efficiency

2. The yield rate of the product is low. When the solid optical adhesive is bonded to the ITO conductive layer, bubbles will generally be generated. The current method of defoaming is to use heat and pressure. This method only makes the edges The air bubbles have a chance to be released, and most of the air bubbles that are not on the edge are all evenly dispersed into the colloid, which will reduce the light transmittance of the colloid. In the prior art, the yield rate of optical glue coated by solid lamination method is only 50%. %

3. Low profit, unqualified products including scrapping and rework of the entire touch screen will cause a lot of waste and increase production costs

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