Illumination systems for reflective displays
A display device ( 30 ) comprises a reflective display ( 38 ) arranged to render a first image viewable through a viewing surface and a projection means ( 31 - 37 ) arranged to render a second image viewable in reflection on the viewing surface, the reflective display ( 38 ) and the projection means ( 31 - 37 ) being mounted on a common frame.
1. An electro-optic display, comprising:
a light transmissive front electrode;
an electro-optic layer;
a rear electrode having a light transmissivity of at least 85%; and
a white or reflective backing,
wherein the rear electrode is shaped as a grid having a plurality of grid lines with a plurality of open spaces between the grid lines and the rear electrode is disposed between the white or reflective backing and the electro-optic layer,
wherein the electro-optic layer comprises a dispersion containing a plurality of charged particles in a fluid, the charged particles capable of moving through the fluid upon application of an electric field, wherein the charged particles and the fluid are encapsulated within a plurality of capsules having cross-sectional areas, and
wherein an area of the plurality of open spaces between the grid lines of the rear electrode and the cross-sectional area of the capsules have a ratio from 1:5 to 5:1 (area:area).
2. The electro-optic display of claim 1 , wherein the capsules have an aspect ratio of 1:3 to 3:1.
3. The electro-optic display of claim 1 , wherein the rear electrode is disposed adjacent to the white or reflective backing.
4. The electro-optic display of claim 1 , wherein the plurality of charged particles comprises black particles.
5. The electro-optic display of claim 4 , wherein the plurality of charged particles further comprises white particles.
6. The electro-optic display of claim 1 , wherein the grid lines comprise microwires.