Patent ID: 9019199
Filing Date: 2015-04-28
Classification: G02F

Abstract:
1. An electrophoretic display apparatus switchable between a black-white mode and a color mode, the electrophoretic display apparatus comprising: an electrophoretic display panel having a display area, the display area comprising a first sub-pixel, a second sub-pixel and a third sub-pixel; a light guide positioned over the display area, wherein the light guide has a light receiving surface and a light emitting surface that faces the display area; a light source for emitting a light into the light receiving surface, wherein the light guide is operable to direct the light towards the display area through the light emitting surface; a light-splitting element interposed between the light guide and the electrophoretic display panel, and capable of splitting the light directed towards the display area into a first light beam, a second light beam and a third light beam each having a wavelength different from one another, wherein the first light beam, the second light beam and the third light beam are transmitted in different directions; and a lens element for directing the first light beam, the second light beam and the third light beam to the first sub-pixel, the second sub-pixel and the third sub-pixel, respectively, the lens element being disposed between the light-splitting element and the electrophoretic display panel, wherein the lens element has a first surface facing the light-splitting element, and a second surface opposite to the first surface, and the lens element comprises: wherein when the light source is turned on, the electrophoretic display apparatus is operated in the color mode, and when the light source is turned off, the electrophoretic display apparatus is operated in the black-white mode.