MOLDED LED LIGHT SHEET

摘要

An initially flat light sheet is formed by printing conductor layers and microscopic LEDs over a flexible substrate to connect the LEDs in parallel. The light sheet is then subjected to a molding process which forms 3-dimensional features in the light sheet, such as bumps of any shape. The features may be designed to create a desired light emission profile, increase light extraction, and/or create graphical images. In one embodiment, an integrated light sheet and touch sensor is formed, where the molded features convey touch positions of the sensor. In one embodiment, a curable resin is applied to the light sheet to fix the molded features. In another embodiment, optical features are molded over the flat light sheet. In another embodiment, each molded portion of the light sheet forms a separate part that is then singulated from the light sheet.

主权项

1. An illumination structure comprising:
a layer of light emitting diodes (LEDs) provided over a flexible substrate; a first conductor layer and a second conductor layer sandwiching the LEDs to connect the LEDs in parallel, the layer of LEDs, the first conductor layer, the second conductor layer, and the substrate comprising a flexible light sheet; and one or more molded 3-dimensional features in the light sheet achieving an optical effect.