“All-Black" Effect OCA Bonding

Jun 07,2023

All black display effect in TFT LCD module circle is a new&trending technology, which uses a kind of special OCA glue on cover lens to do CTP assembly work. It makes the whole surface of the display unit uniformly black when the display is off and provides excellent viewing experience.

 It’s known that there is distinct grey shadow in active area for TFT LCD touch screens by regular OCA bonding or air bonding due to light transmission and air gap between the TFT LCD and touch panel, while for touch screens by “all-black” effect OCA bonding, the entire screen looks all black in standby mode. Because the all black display effect applies a special OCA glue named Dyed OCA glue, which accord with the black printing color on the boarders of the cover glass.

 All-Black Effect OCA Bonding

5 inch high brightness LCD display with Cover Lens Optical Bonding all black effect

DST/Air Bonding

5 inch 800x480 LCD with Cover Lens Air Bonding DST Bonding

The dyed OCA glue is in the state of raw pulp and has good uniformity, different projects could flexibly select the different thickness and adaptive transmittance OCA to meet the TFT product requirements, as the chart below shows.

OCA Specs Table

"All-Black" effect TFT LCD touch screens features with low haze and excellent appearance. It’s mainly used in smart switch, smart watch, door control system, vehicle devices, industrial controllers, and so on.

Our company could support this ‘All black’ technology for 3.5”~15.6” TFT LCD size with our professional R&D team and QC team, we are looking forward to your sincere and friendly cooperation from all over the world.

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