THIN FLEXIBLE LED LIGHT SHEET APPLICATIONS

摘要

Various applications and customizations of a thin flexible LED light sheet are described. Microscopic LED dice are printed on a thin substrate, and the LEDs are sandwiched between two conductor layers to connect the LEDs in parallel. The conductor layer on the light emitting side is transparent. In one embodiment, the light sheet backlights all or a portion of a translucent ceiling material of an automobile to cause the backlit portion of the ceiling material to illuminate the automobile's interior with diffused lighting. This greatly reduces glare for the driver. The emitted color of the light sheet may be adjusted to compensate for the color component added by the ceiling material color. Four light sheets may be connected in series to drop approximately 12 volts. The light sheet color may be controllable by using adjustable RGB color components, either with phosphors or different LED colors.

主权项

1. An illumination system for an automobile comprising:
a translucent ceiling material covering a ceiling area of the automobile; at least one layer of light emitting diodes (LEDs) provided over a flexible substrate; and a first conductor layer and a second conductor layer sandwiching the LEDs to supply power to the LEDs, at least the first conductor layer allowing light to pass through, the first conductor layer, the second conductor layer, and the substrate comprising a flexible light sheet, wherein the light sheet is positioned behind at least a portion of the ceiling material to backlight the ceiling material, and wherein light from the light sheet, when the LEDs are illuminated, passes through the ceiling material to illuminate an interior of the automobile.