Orthogonal Multi-Row Touch Panel Stimulation
AssigneeBroadcom Corporation
InventorsDavid A. Sobel, Sumant Ranganathan, John S. Walley
Life of this patent
Estimating the term…
Abstract
Control circuitry for a touch panel includes a touch panel interface, a memory comprising scanning logic, and a controller in communication with the memory and the touch panel interface. The controller is operable, when the scanning logic is executed, to energize a first and a second row in the touch panel simultaneously, a first time; obtain a first signal measurement along a column intersecting the first and second rows; energize the first and the second row in the touch panel simultaneously, a second time; obtain a second signal measurement along the column; and determine a first pixel value and a second pixel value along the column from the first signal measurement and the second signal measurement.
Claims20
A method comprising:
- performing a first measurement at a receiver when a transmitter energizes a region of a touch panel using a first waveform;
- performing a second measurement at the receiver when the transmitter energizes the same region of the touch panel using a second waveform, the second waveform orthogonal in content to the first waveform;
- and
- combining the first and second measurements to determine a pixel result on the touch panel.
A device comprising:
- a touch panel;
- and
- touch panel circuitry comprising:
- a transmitter configured to:
- transmit a first waveform over a portion of the touch panel;
- and
- transmit a second waveform over the same portion of the touch panel,
- the second waveform orthogonal to the first waveform;
- and
- a receiver configured to:
- perform a first measurement when the transmitter transmits the first waveform over the portion of the touch panel;
- and
- perform a second measurement when the transmitter transmits the second waveform over the portion of the touch panel;
- and
- measurement circuitry configured to:
- combine the first and second measurements to determine a combined measurement;
- and
- responsive to the combined measurement, determine a pixel result on the touch panel.
A device comprising:
- a touch panel;
- a receiver coupled to the touch panel, the receiver configured to perform multiple measurements on the touch panel, the multiple measurements including measurements of waveforms that are orthogonal in content;
- and
- measurement circuitry coupled to the receiver, the measurement circuitry is configured to, based on the orthogonal content of the waveforms, determine a pixel result for the touch panel using the multiple measurements.
Dependencies are inferred from the claim text.