SOURCE DRIVER TOUCH TRANSMITTER IN PARALLEL WITH DISPLAY DRIVE
First Claim
1. A processing system for a display device integrated with a capacitive sensing device, the processing system comprising:
- a driver module comprising driver circuitry, the driver module configured for coupling to a sub-pixel with a first source line and a first common electrode, wherein the driver module is configured to;
update the sub-pixel by driving the first source line to a first voltage;
drive the first common electrode for capacitive sensing by modulating the first common electrode between a second voltage and a third voltage; and
shift the first voltage driven onto the first source line while the first common electrode is modulated between the second voltage and the third voltage by a value about equal to a difference between the second voltage and the third voltage;
a receiver module coupled to a plurality of receiver electrodes configured to receive resulting signals with the receiver electrodes while the first common electrode is modulated between the second voltage and the third voltage; and
a determination module configured to determine positional information based on the resulting signals.
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Accused Products
Abstract
Various embodiments enable driving one or more sub-pixels with a source voltage while concurrently modulating the voltage of one or more common electrodes coupled to the sub-pixels to perform input sensing with the common electrodes. The voltage driven onto the sub-pixel may be shifted while the common electrode is modulated by a value about equal to about the amplitude of the modulation applied to the common electrode. Thus, the potential difference between the source line and common electrode remains substantially unchanged so that display asperities are not introduced while input sensing while concurrently updating a sub-pixel with display information. Thus, the common electrode(s) may be modulated for input sensing without interfering with display updating of the one or more sub-pixels, greatly increasing the amount of time available for performing input sensing and/or display updating.
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Citations
20 Claims
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1. A processing system for a display device integrated with a capacitive sensing device, the processing system comprising:
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a driver module comprising driver circuitry, the driver module configured for coupling to a sub-pixel with a first source line and a first common electrode, wherein the driver module is configured to; update the sub-pixel by driving the first source line to a first voltage; drive the first common electrode for capacitive sensing by modulating the first common electrode between a second voltage and a third voltage; and shift the first voltage driven onto the first source line while the first common electrode is modulated between the second voltage and the third voltage by a value about equal to a difference between the second voltage and the third voltage; a receiver module coupled to a plurality of receiver electrodes configured to receive resulting signals with the receiver electrodes while the first common electrode is modulated between the second voltage and the third voltage; and a determination module configured to determine positional information based on the resulting signals. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A method of capacitive sensing with a display device integrated with a capacitive sensing device having a sub-pixel, a first source line coupled to the sub-pixel, a first common electrode coupled to the sub-pixel, and a plurality of receiver electrodes, the method comprising:
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simultaneously updating the sub-pixel and driving the first common electrode for capacitive sensing by; driving the first source line with a first voltage to update the sub-pixel; driving the first common electrode for capacitive sensing by modulating the first common electrode between a second voltage and a third voltage; and shifting a value of the first voltage driven onto the first source line while the first common electrode is modulated between the second voltage and the third voltage by an amount equal to about a difference between the second voltage and the third voltage; receiving resulting signals with the receiver electrodes while the first common electrode is modulated between the second voltage and the third voltage; and determining positional information based on the resulting signals. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17, 18)
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19. An input device comprising:
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a plurality of source lines; a plurality of common electrodes; and a processing system configured for coupling to a sub-pixel with a first source line of the plurality of source lines and a first common electrode of the plurality of common electrodes, wherein the processing system is configured to; update the sub-pixel by driving the first source line to a first voltage; drive the first common electrode for capacitive sensing by modulating the first common electrode between a second voltage and a third voltage while a gate line associated with the sub-pixel is driven at a steady state voltage; shift the first voltage driven onto the first source line while the first common electrode is modulated between the second voltage and the third voltage by a value about equal to a difference between the second voltage and the third voltage; receive resulting signals with the receiver electrodes while the first common electrode is modulated between the second voltage and the third voltage; and determine positional information based on the resulting signals. - View Dependent Claims (20)
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Specification