Display stack with integrated force input sensor
First Claim
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1. An organic light-emitting diode display stack layer configured to receive a force input and comprising:
- a substrate;
an anode disposed on the substrate; and
an electrical trace disposed on the substrate, coplanar with the anode, and substantially circumscribing the anode, the electrical trace configured to couple to a force input sensor.
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Abstract
A force input sensor can include a strain-sensitive region disposed as a meandering electrical trace onto a structural or functional layer of a display stack. In particular, the meandering electrical trace can include one or more diversions from a linear path, each diversion configured to increase the length of the electrical trace. A diversion can form a loop to increase the inductance of the meandering electrical trace; the inductance of the meandering electrical trace can be correlated to length of the inductive trace which, in turn, can be correlated to strain experienced by the structural or functional layer.
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Citations
20 Claims
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1. An organic light-emitting diode display stack layer configured to receive a force input and comprising:
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a substrate; an anode disposed on the substrate; and an electrical trace disposed on the substrate, coplanar with the anode, and substantially circumscribing the anode, the electrical trace configured to couple to a force input sensor. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. An organic light-emitting diode display configured to receive force input, the display comprising:
a display stack comprising; a substrate defining an active display region of the display; a grid of patterned electrical traces disposed on the substrate; an array of pixels within the active display region, each pixel comprising; an anode coupled to the substrate; a light-emitting element coupled to the anode; and a cathode coupled to the light-emitting element;
wherein each patterned electrical trace of the grid of patterned electrical traces is coplanar with at least one anode of at least one pixel and is configured to substantially circumscribe the at least one anode of the at least one pixel; anda force input sensor coupled to each patterned electrical trace of the grid of patterned electrical traces, the force input sensor configured to correlate an electrical property of at least one patterned electrical trace to a magnitude of force applied to the display. - View Dependent Claims (11, 12, 13, 14)
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15. A method for detecting force input with an organic light-emitting diode display, the method comprising:
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deactivating a pixel of the organic light-emitting diode display; causing an anode of the deactivated pixel to float with respect to a system ground; applying a drive signal to an input lead of an electrical trace at least partially circumscribing the anode of the deactivated pixel; measuring an electrical property of the electrical trace based on a sense signal received from an output lead of the electrical trace; correlating the measurement to a strain experienced by the electrical trace; and correlating the strain to an input force applied to the organic light-emitting diode display. - View Dependent Claims (16, 17, 18, 19, 20)
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Specification