Synaptics Patent Grants

Real-time spectral noise monitoring for proximity sensing device

Granted: March 28, 2017
Patent Number: 9606670
Techniques for detecting noise with a capacitive sensing device. The includes driving a set of one or more sensor electrodes of a plurality of sensor electrodes with a sensing signal at a first frequency, receiving resulting signals based on the sensing signal for each of the one or more sensor electrodes driven, probing the set of one or more sensor electrodes to obtain a set of probing signals, and summing the probing signals of the set of probing signals to generate a noise-analysis…

Input device

Granted: March 28, 2017
Patent Number: 9606676
An input device comprises a first and second pluralities of capacitive sensor electrodes. The first plurality of capacitive sensor electrodes is oriented along a first axis, disposed in a first layer, and configured to update a display screen of the input device. The second plurality of capacitive sensor electrodes is oriented along a second axis that differs from the first axis. A display region of the display screen has a first dimension along the first axis and a second dimension the…

Trace shielding for input devices

Granted: March 28, 2017
Patent Number: 9606686
Embodiments of the present invention generally provide shield electrodes for shielding one or more conductive routing traces from one or more receiver electrodes in an input device comprising a display device integrated with a sensing device to reduce the capacitive coupling between the conductive routing traces and the receiver electrodes. The shield electrode may be configured to reduce the effect of an input object on the capacitive coupling between the conductive routing traces and…

Display apparatus and display panel driver including software-controlled gate waveforms

Granted: March 28, 2017
Patent Number: 9607566
A liquid crystal display apparatus includes a liquid crystal display panel having gate lines and source lines, a GIP circuit which drives the gate lines and a source driver IC3 which drives the source lines. The source driver IC3 includes a gate control signal generator which generates gate control signals SOUT1-SOUTn which control the GIP circuit. The gate control signal generator is configured so that it is possible to control the waveforms of the gate control signals SOUT1-SOUTn in…

Display panel driver and display device

Granted: March 28, 2017
Patent Number: 9607568
A display panel driver includes: a grayscale amplifier receiving an input grayscale reference voltage and generating an output grayscale reference voltage corresponding to the input grayscale reference voltage; a voltage dividing resistor receiving the output grayscale reference voltage and generating a plurality of grayscale voltages by using the received output grayscale reference voltage; a decoder circuit selecting grayscale voltages from among the plurality of grayscale voltages in…

Efficient high voltage square wave generator

Granted: March 28, 2017
Patent Number: 9608613
This disclosure generally provides a system, active input device, and method for generating an amplified square wave signal based on an input signal. The method comprises generating a pulse signal based on the input signal, and driving a switching signal based on the pulse signal to control a first switch. A pulse width of the pulse signal is adaptively controlled using a control signal generated based on the amplified square wave signal. An output terminal of the first switch is coupled…

Methods and apparatus for capacitively detecting key motion and finger presence on keyboard keys

Granted: March 21, 2017
Patent Number: 9600084
A keyboard including a plurality of key assemblies configured to be pressed by an input object. A subset of the plurality of key assemblies each includes a key cap and a first electrode pair underneath the key cap and configured to detect key motion in response to downward force applied by the input object. The key cap also includes a second electrode pair disposed underneath the key cap and configured to detect positional information about the input object interacting with the key cap.

Driving sensor electrodes for noise measurement

Granted: March 21, 2017
Patent Number: 9600121
In an example, a processing system for a capacitive sensing device includes a sensor module and a determination module. The sensor module includes sensor circuitry coupled to a plurality of transmitter electrodes and a plurality of receiver electrodes. The sensor module is configured to receive resulting signals from the plurality of receiver electrodes during a plurality of noise acquisition bursts while suspending transmission with the plurality of transmitter electrodes. The resulting…

Methods and systems for enrolling biometric data

Granted: March 21, 2017
Patent Number: 9600709
Methods and systems for enrolling biometric data that is easier to use and provides a more positive end user experience. Additionally, machine readable medium storing instructions configurable to achieve the results when executed by a computing device are also provided.

Display device and display driver with sequential transfer of gray scale reference voltages

Granted: March 21, 2017
Patent Number: 9601043
The display device includes display drivers including first and second ones operable to output, based on display data, gradation signals to source lines of display panel regions. The display device is arranged to be able to suppress the variation in output voltage between display drivers while minimizing the increases in chip area of the display drivers and in wiring area of a display panel and keeping high noise resistance. Each display driver can generate gray scale reference voltages…

Device and method for synchronizing display and touch controller with host polling

Granted: March 21, 2017
Patent Number: 9601085
Devices, systems, and methods are provided for coordinating the interaction between a touch screen controller and a display controller in an electronic device of the type including a host processor, a touch screen controller configured to acquire capacitive measurements from a touch screen, and a display controller configured to update a display at a refresh frequency and phase. The method includes: sharing a synchronization signal between the display controller and the host processor,…

Shielding with display elements

Granted: March 14, 2017
Patent Number: 9594458
A method and apparatus for operating an input device having a touch sensor and associated display device is discussed. While performing touch sensing, inactive transmitter electrodes of the touch sensor are electrically floated, and one or more source lines from the display device are operated to achieve shielding against interference, such as that coming from a backlight underneath the touch sensor.

Integrated fingerprint sensor and navigation device

Granted: March 14, 2017
Patent Number: 9594498
An apparatus is disclosed in a first embodiment of the invention as including a non-conductive substrate providing a first surface onto which a user can apply a fingerprint. A fingerprint sensing circuit is applied to a second surface of the non-conductive substrate opposite the first surface. The fingerprint sensing circuit is capable of sensing a fingerprint through the non-conductive substrate. A navigation device is positioned adjacent to (e.g., below) the non-conductive substrate…

Fingerprint template compression

Granted: March 14, 2017
Patent Number: 9594940
A method and device for compressing a fingerprint template is provided. The fingerprint template is derived from fingerprint image data captured from a sensor. The compressing process initially surveys the fingerprint template to determine one or more starting points for encoding. Subsequently, the compression process selects a starting point from the one or more starting points and proceeds to encode that starting point. After encoding the starting point, the compression process encodes…

Display drive circuit

Granted: March 7, 2017
Patent Number: 9588612
Provided is a display drive circuit which is connected to a display panel including a gate drive circuit that scans gate electrodes, a source driver that drives source electrodes of the display panel, and a gate control driver that supplies a clock signal to the gate drive circuit. The display drive circuit performs an intermittent operation which is alternately provided with a display period in which the source electrodes are driven and an interruption period during which the display…

Classifying input objects interacting with a capacitive button

Granted: March 7, 2017
Patent Number: 9588629
Embodiments of the invention generally provide an input device that includes a zero-dimensional button that detects whether an input object is proximate to a sensing region. However, different input objects may provide similar responses which may prevent the input device from accurately determining whether the user actually intended to activate the button. In one embodiment, the input device drives a capacitive sensing signal onto a sensor electrode in the capacitive button and measures…

Credential quality assessment engine systems and methods

Granted: March 7, 2017
Patent Number: 9589399
An authentication risk management system and method are disclose which may comprise a biometric identification unit configured to sense biometric data from a user and produce an image of the sensed biometric data with a stored template associated with the user; and a biometric identification unit natural identification evaluation engine configured to provide a natural identification authentication score. The system and method may further comprise a credentials quality assessment engine…

Touch pad with flexible substrate

Granted: March 7, 2017
Patent Number: 9591764
A touch sensor device is provided that uses a flexible circuit substrate to provide an improved input device. Specifically, the present invention uses a touch sensor controller affixed to the flexible circuit substrate, which is coupled to a sensor component to provide a flexible, reliable and cost effective touch sensor suitable for a wide variety of applications. In one embodiment the touch sensor uses a flexible circuit substrate that provides relatively high temperature resistance.…

System and method for using passive pen with ground mass state switch

Granted: February 28, 2017
Patent Number: 9582092
A processing system includes a sensor module and a determination module. The sensor module includes sensor circuitry coupled to transmitter electrodes and receiver electrodes. The sensor module is configured to transmit transmitter signals with the transmitter electrodes and receive resulting signals with the receiver electrodes. The determination module is configured to determine a presence of a passive pen in a sensing region using the resulting signals, determine a current ground mass…

Passive pen with ground mass state switch

Granted: February 28, 2017
Patent Number: 9582093
A passive pen includes a pen body, and a tip disposed at a first end of the pen body. The tip capacitively couples to the pen body, and the capacitive coupling is configured to change the tip from a first ground mass state to a second ground mass state.