Optical switching element and photoaddressable display medium using the same
AssigneeFuji Xerox Co., Ltd.
InventorsHideo Kobayashi, Takehito Hikichi
Life of this patent
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Abstract
An optical switching element including at least a multi-layered optical switching layer that includes a charge generation layer and a charge transport layer wherein, the charge transport layer contains a charge transporting material represented by the following general formula (1). The optical switching element is applicable in a device, a photoaddressable display medium and a display device. The optical switching element may alternatively include a mono-layered optical switching layer that has a charge generating function and a charge transporting function, wherein the mono-layered optical switching layer contains the charge transporting material represented by the following general formula (1).
Claims12
A photoaddressable display medium, comprising:
- a pair of electrodes, at least one of which has optical transparency;
- an optical switching element;
- and
- a display element including a display layer having a memory effect,
- wherein
- the optical switching element comprises:
- a multi-layered optical switching layer that contains a charge generation layer and a charge transport layer;
- or
- a mono-layered optical switching layer that has a charge generating function and a charge transporting function,
- wherein the charge transport layer or the mono-layered optical switching layer contains a charge transporting material represented by the following general formula (1):
- wherein R1 and R3 each independently represent CH3 or C2H5, and R2 and R4 each independently represent H, CH3 or C2H5;
- and
- wherein
- the optical switching element and the display element are laminated between the pair of electrodes, and
- the display element is a color display element having a plurality of display layers relative to the optical switching element, and each of the plurality of display layers is a cholesteric liquid crystal display layer that selectively reflects visible light beams of a color that is different from the color of the visible light beams selectively reflected by any other one of the plurality of display layers.
A photoaddressable display medium, comprising:
- a pair of electrodes, at least one of which has optical transparency;
- an optical switching element wherein
- the optical switching element comprises:
- a multi-layered optical switching layer that contains a charge generation layer and a charge transport layer;
- or
- a mono-layered optical switching layer that has a charge generating function and a charge transporting function,
- wherein the charge transport layer or the mono-layered optical switching layer contains a charge transporting material represented by the following general formula (2):
- wherein R1 and R3 each independently represent CH3 or C2H5, and R2 and R4 each independently represent H, CH3 or C2H5;
- and
- a display element including a display layer having a memory effect,
- wherein
- the optical switching element and the display element are laminated between the pair of electrodes, and
- the display element is a color display element having a plurality of display layers relative to the optical switching element, and each of the plurality of display layers is a cholesteric liquid crystal display layer that selectively reflects visible light beams of a color that is different from the color of the visible light beams selectively reflected by any other one of the plurality of display layers.
Dependencies are inferred from the claim text.