Analog IMOD having a color notch filter
First Claim
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1. A device, comprising:
- an analog interferometric modulator (AIMOD) includinga substrate having a first side that is exposed to receive incident light and a second side opposite the first side;
a stationary first electrode disposed on the second side of the substrate;
an optical stack disposed on the second side of the substrate, the optical stack including a broadband absorbing layer;
a second electrode above the first electrode and the optical stack such that there is a cavity between the second electrode and the first electrode;
a broadband reflective movable layer coupled to the second electrode, the movable layer configured to move to at least three different positions relative to the optical stack in response to a voltage applied across the first electrode and the second electrode; and
a notch filter located on the same side of the movable layer as the optical stack and the substrate, the notch filter being spaced apart from the movable layer and configured to at least partially absorb light having a wavelength between about 400 nm and about 600 nm.
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Abstract
This disclosure provides systems, methods and apparatus related to an electromechanical display device. In one aspect, an analog interferometric modulator (AIMOD) includes a reflective display pixel having a movable reflective layer and a stationary absorber layer, the reflective layer and absorber layer defining a cavity therebetween. A color notch filter may be employed to produce an improved white state. In some implementations, the color notch filter is positioned on a side of the substrate opposite the absorber layer. In some other implementations, the color notch filter is positioned between the substrate and the movable reflective layer.
27 Citations
18 Claims
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1. A device, comprising:
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an analog interferometric modulator (AIMOD) including a substrate having a first side that is exposed to receive incident light and a second side opposite the first side; a stationary first electrode disposed on the second side of the substrate; an optical stack disposed on the second side of the substrate, the optical stack including a broadband absorbing layer; a second electrode above the first electrode and the optical stack such that there is a cavity between the second electrode and the first electrode; a broadband reflective movable layer coupled to the second electrode, the movable layer configured to move to at least three different positions relative to the optical stack in response to a voltage applied across the first electrode and the second electrode; and a notch filter located on the same side of the movable layer as the optical stack and the substrate, the notch filter being spaced apart from the movable layer and configured to at least partially absorb light having a wavelength between about 400 nm and about 600 nm. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
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16. A device, comprising:
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a means for modulating light including a substrate having a first side that is exposed to receive incident light and a second side opposite the first side; a first means for conducting electrostatic charge, the first conducting means disposed on the second side of the substrate; a first means for absorbing light disposed on the second side of the substrate; a second means for conducting electrostatic charge, the second conducting means being positioned above the first conducting means and the first absorbing means, such that there is a cavity between the second conducting means and the first conducting means; a means for reflecting light, the reflecting means coupled to the second conducting means, the reflecting means configured to move to at least three different positions relative to the first absorbing means in response to a voltage applied across the first conducting means and the second conducting means; and a second means for absorbing light located on the same side of the reflecting means as the substrate, the second absorbing means being spaced apart from the reflecting means and configured to at least partially absorb light having a wavelength between about 400 nm and about 600 nm. - View Dependent Claims (17, 18)
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Specification