Capacitive MEMS-Based Display with Touch Position Sensing
First Claim
1. An electronic display, comprising:
- a plurality of pixels, each pixel comprising at least two material layers disposed in separated relationship to each other, said material operative to cause a respective pixel to change both a viewing state and a capacitance state according to an applied voltage;
a driving circuit operative to apply a voltage to each pixel; and
a sensing circuit for determining capacitance values of said pixels while said electronic display is in operation.
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Accused Products
Abstract
A micro-electro-mechanical systems (MEMS) pixel for display and touch position sensing includes a substrate and a capacitive element. The capacitive element includes one or more pixels having a first conductive platelet above the substrate, and a second conductive platelet above and spaced apart from the first conductive platelet, the two platelets forming the capacitive element. A connection to each platelet provides for applying a voltage, wherein the platelet separation changes according to the applied voltage. A transparent dielectric plate, spaced apart from and positioned opposite the substrate, covers the at least one pixel. A capacitance sensing circuit attached to the connection to each platelet of the pixel senses changes in capacitance not resulting from the applied voltage.
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Citations
20 Claims
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1. An electronic display, comprising:
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a plurality of pixels, each pixel comprising at least two material layers disposed in separated relationship to each other, said material operative to cause a respective pixel to change both a viewing state and a capacitance state according to an applied voltage; a driving circuit operative to apply a voltage to each pixel; and a sensing circuit for determining capacitance values of said pixels while said electronic display is in operation. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A method for operating an electronic display comprised of a plurality of pixels, said method comprising:
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providing an image to a display to place said pixels in a given status corresponding to the image; determining at any point in time an expected capacitance of certain pixels according to the given status of said display; determining an actual capacitance value of one or more of said certain pixels at said point in time; and providing an indication dependent upon a match condition of a determined actual capacitance value at a particular pixel and an expected capacitance value at said particular pixel based upon a determined display status of said particular pixel. - View Dependent Claims (11, 12, 13, 14)
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15. An electronic display element enabled for touch sensing, comprising:
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two pixel platelets having a variable separation, each platelet comprising at least one conductive layer, said conductive layers operative to cause a respective pixel to change both a viewing state and a capacitance state according to an applied voltage; a driving circuit operational to apply a voltage to the two platelets to vary the separation, wherein the viewing state and the capacitance state of the element is varied in response to the applied voltage; and a sensing circuit operatively coupled to the platelets to determine the capacitance of the platelets. - View Dependent Claims (16, 17, 18, 19, 20)
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Specification