~right and left~
Smartphones are prevalent. I think many of you are using it.
A black frame is generally printed on this display part (cover glass). This part has the electric wiring of the touch panel on the display, and it is printed like this so that it can not be seen.
By the way, the thickness of this frame is the same width on the left and right, but if the printing is shifted, the width on the left and right will change. So how much do you think humans need to shift to recognize that the thickness is different?
It depends on the person's personality, but it's like this.
1. The difference in thickness between left and right is 0.2 mm or more
Almost 100% of people feel "off".
2. The difference in thickness between the left and right is about 0.15 mm
It feels "off", but it doesn't matter.
3. The difference in thickness between left and right is 0.1 mm or less
most people don't notice.
From this, we can say that the printing of smartphone cover glass requires an accuracy of ±50 μm or less.
To guarantee this, we need a screen printer with the precision needed to manufacture electronic components.
Since the cover glass is not an electronic component, manufacturing it with a simple screen printer would result in a pile of defects. On the other hand, NEWLONG's screen printers are originally used for manufacturing electronic parts, so there is no problem with accuracy.
Smartphones require advanced technology not only for electronic components, but also for nameplates such as cover glass.
