| 摘要 |
Disclosed herein is an electrophoretic display apparatus switchable between a black-white mode and a color mode. The electrophoretic display apparatus includes an electrophoretic display panel, a light guide, a light source, a light-splitting element and a lens element. The light guide is disposed in front of a display area of the electrophoretic display panel. The light source is operable to emit a light, which is directed to the display area by the light guide. The light-splitting element is disposed between the light guide and the electrophoretic display panel, and is operable to split the light into a first, a second and a third beam each having a principal wavelength different from the others. The lens element is disposed between the light-splitting element and the display area, and is operable to direct the first, second and third beams to corresponding sub-pixels. |
| 主权项 |
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:
a plurality of first cylindrical lenses formed in parallel with each other on the first surface;a plurality of second cylindrical lenses formed in parallel with each other on the second surface; anda plurality of third cylindrical lenses formed in parallel with each other on the second surface, wherein the third cylindrical lenses are parallel with the second cylindrical lenses, and each of the second cylindrical lenses and each of the third cylindrical lenses are alternately arranged, wherein each of the second cylindrical lenses has a thickness that is greater than a thickness of each of the third cylindrical lenses; 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. |
