Micromechanical ultrasonic transducers and display
First Claim
Patent Images
1. A display device, comprising:
- a substrate;
a display coupled to the substrate;
a piezoelectric micromechanical ultrasonic transducer (PMUT) array proximate the display, wherein at least a portion of the PMUT array resides on the substrate;
a plurality of thin-film transistors (TFTs), at least a first array of the TFTs residing on the substrate and including circuitry for controlling the display and at least a second array of the TFTs residing on the substrate and including circuitry for controlling at least a portion of the PMUT array; and
a control system.
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Abstract
An apparatus may include a one- or two-dimensional array of micromechanical ultrasonic transducer (PMUT) elements positioned below, beside, with, on, or above a backplane of a visual display. The backplane may be a thin-film transistor (TFT) backplane. The array of PMUT elements may be a piezoelectric micromechanical ultrasonic transducer (PMUT) array or a capacitive micromechanical ultrasonic transducer (CMUT) array. The PMUT array may be configurable to operate in modes corresponding to multiple frequency ranges. When operating in the low-frequency mode, the apparatus may be capable of gesture detection. A high-frequency mode may include a fingerprint sensor mode or a stylus detection mode.
81 Citations
32 Claims
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1. A display device, comprising:
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a substrate; a display coupled to the substrate; a piezoelectric micromechanical ultrasonic transducer (PMUT) array proximate the display, wherein at least a portion of the PMUT array resides on the substrate; a plurality of thin-film transistors (TFTs), at least a first array of the TFTs residing on the substrate and including circuitry for controlling the display and at least a second array of the TFTs residing on the substrate and including circuitry for controlling at least a portion of the PMUT array; and a control system. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32)
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Specification