We can do a large variety of LED displays; single colour, separate LEDs for RGB, and RGB LEDs with external drivers. We have even put LEDs inside the layers of a PCB to show clearly that we can build PCBs with working devices inside the layers. However, for flexible and fabric LED displays we generally use a variant of the addressable RGB LEDs.
We can create LED displays on paper and film, including transparent film with good transparency of the circuit. Especially for wearables, we have a fabric version of the LED display. The fabric is incredibly flexible and robust giving excellent performance in a broad range of applications. The flexibility of the final assembly depends on the encapsulation requirements, i.e. washable.