Proposal and Case Studiesof Tapes and Film

Processing Light-Blocking Films for LCD Displays

Customer's Challenge

The customer wanted small light-blocking film parts for LCD displays to be arranged on a sheet for easy one-step application.

CSTEC's Proposal

The customer needed many irregular holes to make light diffusion more uniform. However, the material was large and required many holes of different sizes and amounts, die-cutting was difficult. Instead, we used a large laser processing machine. The laser scanner allowed us to process many holes in a short time.
We combined a light-blocking tape and a double-sided adhesive tape and aligned them during processing. This allowed the parts to be supplied on a sheet, helping simplify the customer's assembly process.
The final product was a black-and-white optical tape used in a smartphone light guide plate. The product required both light-blocking and reflective properties in specific areas, and the small part size made release control very difficult. By carefully adjusting the die-cutting process, we were able to meet the customer's requirements.

Materials used

Black-and-White Tape