Recently, Gelivable received a inquiry about a 7 inch integrated black gorilla glass for German’s smart home display . The active area is translucent black . When the display is on, the contents will be read clearly; when the display is off, the gorilla glass and the OLED screen looks as a whole, the lines between the active area and the black border is invisible.
The realization of translucent black is the key of this case. We proposed two primary solutions after group discussion.
Solution one:Vacuum plating.
After checking the drawings and effect pictures, some electroplating factories thought they could have produced. But with the further discussion and comparison, we found out that the plating’s color did not match the samples’.
Solution two:Using the IR ink to print the translucent black.
The desired effect is achieved by adjustments of transmittance and the color. We printed the IR ink on soda lime glass and sent them to clients. They were satisfied with the effect and instructed us to propose the final samples.
It took nearly one week to finish the process of CNC, Chemical strengthening and the print of the black border. The next is the most important part-translucent black in AA. The technician and QC followed up this case closely. We printed five samples of different transmittance and compared them repeatedly. The transmittance was set at 10±3%. The sample assembled on the OLED screen looks very good. Seen from the front, the boundary between active area and the black border are invisible. We were so excited.
The samples were sent to the customer immediately. Soon, the customer assembled the custom gorilla glass with touch screen via OCA bonding. However, an unexpectedly feedback was came up. Compared with the black border,the view area looks very dark. Why did the effect change? The experienced technical manager thought the reason is the property of OCA bonding– it will enhance the transmittance. After bonding, the transmittance of active area was about 15% higher .
Meanwhile, the shortcoming of appearance were shown obviously after the screen was on. Such as, trace of scrapes,foreign material etc.
Now, new solution has to be proposed soon. Can we print the black frame darker ? Or cancel the translucent black and adjust the thickness of the OCA ? We are trying our best to find the answer. No matter how hard it is, we will never give up and keep on moving to provide the most applicable custom gorilla glass for clients.