Reduced capacitance display element
First Claim
1. A display element comprising:
- a substantially transparent conductive layer;
a partially reflective insulator having a thickness of between about 40 and 150 Angstroms;
a moveable reflective layer, the partially reflective insulator being positioned between the conductive layer and the moveable reflective layer, wherein a voltage applied between the conductive layer and the moveable reflective layer induces movement of the moveable reflective layer; and
a dielectric layer positioned between the conductive layer and the partially reflective insulator, wherein a capacitance of the display element is reduced compared to a display element without the dielectric layer.
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Accused Products
Abstract
A display element, such as an interferometric modulator, comprises a transparent conductor configured as a first electrode and a movable mirror configured as a second electrode. Advantageously, the partial reflector is positioned between the transparent conductor and the movable mirror. Because the transparent conductor serves as an electrode, the partial reflector does not need to be conductive. Accordingly, a greater range of materials may be used for the partial reflector. In addition, a transparent insulative material, such as a dielectric, may be positioned between the transparent conductor and the partial reflector in order to decrease a capacitance of the display element without changing a gap distance between the partial reflector and the movable mirror. Thus, a capacitance of the display element may be reduced without changing the optical characteristics of the display element.
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Citations
45 Claims
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1. A display element comprising:
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a substantially transparent conductive layer; a partially reflective insulator having a thickness of between about 40 and 150 Angstroms; a moveable reflective layer, the partially reflective insulator being positioned between the conductive layer and the moveable reflective layer, wherein a voltage applied between the conductive layer and the moveable reflective layer induces movement of the moveable reflective layer; and a dielectric layer positioned between the conductive layer and the partially reflective insulator, wherein a capacitance of the display element is reduced compared to a display element without the dielectric layer. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A display system comprising:
a display comprising a plurality of display elements, each of the display elements comprising a substantially transparent conductive layer; a partially reflective non-conductive layer having a thickness of between about 40 and 150 Angstroms; and a moveable reflective layer, the partially reflective non-conductive layer being positioned between the conductive layer and the moveable reflective layer, wherein a voltage applied between the conductive layer and the moveable reflective layer induces movement of the moveable reflective layer; a processor that is in electrical communication with the display, the processor being configured to process image data; and a memory device in electrical communication with the processor. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17, 18, 19, 20)
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21. A display element comprising:
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a substantially transparent conductive layer; a dielectric layer; a partially reflective layer, wherein the dielectric layer is positioned between the conductive layer and the partially reflective layer; and a moveable reflective layer, the partially reflective layer being positioned between the conductive layer and the moveable reflective layer, wherein a voltage applied between the conductive layer and the moveable reflective layer induces movement of the moveable reflective layer; and a capacitance of the display element is reduced compared to a display element without the dielectric layer. - View Dependent Claims (22, 23, 24, 25, 26, 27, 28, 29, 30, 31)
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32. A display element comprising:
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a substantially transparent conductive layer; a dielectric layer; a partially reflective layer, the dielectric layer being positioned between the conductive layer and the partially reflective layer; and a moveable reflective layer, the moveable reflective layer being separated from the partially reflective layer by a gap, wherein when the display element is in an actuated state, the display element appears white to a viewer and in a released state the display element appears non-white to the viewer. - View Dependent Claims (33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45)
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Specification