Patent ID: 7274416
Filing Date: 2007-09-25
Classification: G02B,G02F

Abstract:
1. A subtractive display device comprising picture elements having sub-pixels, each sub-pixel having, viewed during operation in a direction normal to substrates, at least two independently switchable electro-optical components, the device further comprising: a color filter in which each sub-pixel color filter part absorbs or reflects one of a part of the optical spectral range, the parts of the optical spectral range being substantially non-overlapping, the device comprising means for controlling absorption or reflection of remaining parts of the spectral range in each sub-pixel by the at least two switchable electro-optical components, the non-overlapping ranges together covering the optical spectral range, wherein the electro-optical components further comprise at least two switchable electro-optical layers, comprising at least one first fluid and a second fluid respectively, and wherein the second fluid and the first fluid are immiscible.