METHOD AND APPARATUS FOR FRONT-LIT SEMI-RETRO-REFLECTIVE DISPLAY

摘要

The disclosure generally relates to a front-lit display having transparent and selectively emissive light directionality. The disclosed semi-retro-reflective, semi-specular and specular displays include directional front light systems that reflect light in a manner to preserve the non-Lambertian characteristic of the light output. This leads to brighter displays with a higher degree of luminance as compared to conventional microencapsulated electrophoretic displays with substantially Lambertian reflectance where much of the light is not reflected back towards the viewer.

主权项

1. A reflective display device, comprising:
a semi-retro-reflective display sheet having one or more convex protrusions that reflects light in a narrow angle relative to the direction of the incident light; a light source to emit light in a perpendicular direction towards the display sheet; a front electrode; a rear electrode; a fluid disposed between the front and the rear electrodes; a plurality of electrophoretically mobile particles suspended in the optically transparent fluid; and a voltage source in communication to the front and the rear electrodes to selectively move the electrophoretically mobile particles in the fluid.