Atmel Corporation

Wacom Co., Ltd.

Neodron Limited

Vemund Kval Bakken

Trond Jarle Pedersen

Kishore Sundara-Rajan

Esat Yilmaz

John R Logan

Shahrooz Shahparnia

Eivind Holsen

Vivek Pant

Igor Polishchuk

Joo Yong Um

Martin John Simmons

James D Lyle

Steinar Myren

John Stanley Dubery

Izhar Bentov

Sherif Hanna

Yassar Ali

Rune Watn

Sharooz Shahparnia

Samuel Daniel Brunet

Richard Paul Collins

Morten Werner Lund

Einar Fredriksen

Kinshore Sundara-Rajan

Gurbrinder Grewal

Walt T Lifsey

Yen Goh

In one embodiment, a stylus includes one or more electrodes and one or more computer-readable non-transitory storage media embodying first logic for transmitting signals wirelessly to a device through a touch-sensor of the device. The stylus has a first power mode in which components of the stylus for receiving signals from or transmitting signals to the device are powered off; a second power mode in which components of the stylus for receiving signals from the device are powered on at least periodically and components of the stylus for transmitting signals to the device are powered off; and a third power mode in which components of the stylus for transmitting signals to the device are powered on at least periodically. The media further embodies second logic for transitioning the stylus from one of the first, second, and third power modes to another one of the first, second, and third power modes.

Power management system for active stylus

In one embodiment, a stylus comprising an accelerometer operable to detect an acceleration in response to a touch to the body and initiate a pre-determined function, a method of using same, and one or more non-transitory computer-readable storage media embodying logic.

Executing gestures with active stylus

In one embodiment, a stylus includes one or more electrodes included in a tip, and a computer-readable non-transitory storage medium embodying logic that is configured when executed to receive, by the one or more electrodes and an analog front end, signals transmitted from a touch sensor coupled to a touch-sensor controller, and convert the signals into sequences of digital signals. The logic is further configured when executed to feed the sequences of digital signals received in different periods into a memory; correlate each of the sequences of digital signals with a digital data defined by a wide-band code to generate multiple correlations; and transmit a transmission signal to the touch-sensor controller according to a synchronization timing determined based at least in part on one or more of the multiple correlations.

Timing synchronization of active stylus and touch sensor

In one embodiment, a stylus with one or more electrodes and one or more computer-readable non-transitory storage media embodying logic for transmitting signals wirelessly to a device through a touch sensor of the device has one or more sensors for detecting movement of the stylus.

A stylus includes a pen-tip; a sensor; and a processor operable to: operate in a lower-power mode and a higher-power mode; detect, with the sensor, a defined frequency or a defined range of frequencies indicating shaking of the stylus; and transition from the lower-power mode to the higher-power mode in response to the detection of the defined frequency or the defined range of frequencies. The processor is prevented from transitioning from the lower-power mode to the higher-power mode in response to detection of a frequency other than the defined frequency and a range of frequencies other than the defined range of frequencies. The processor, in response to a relative motion between the stylus and a device in communication with the stylus, process both a device signal representative of the relative motion and a stylus signal representative of the detection of the defined frequency or the defined range of frequencies.

Touch-sensitive system with motion filtering

In one embodiment, an active stylus includes a receiver and a transmitter configured to receive and transmit signals from and to a device via a touch sensor of the device, wherein the transmitter is integrated with or comprises an adaptive voltage generation circuit including: a boost voltage controller; a comparator; a switch control; and a bleeder circuit. The active stylus further includes a stylus controller configured to: (a) in a first operation state, control the adaptive voltage generation circuit and the transmitter to transmit signals at a second transmit voltage, and (b) in a second operation state different from the first operation state, control the adaptive voltage generation circuit and the transmitter to transmit signals at a first transmit voltage lower than the second transmit voltage.

Adaptive transmit voltage in active stylus

In one embodiment, computer-readable non-transitory storage media receive one or more signals based on motion of an object, a device, or both. The received signals are compared to a motion profile which defines unintended motion of the object, the device, or both, and this comparison determines whether any of the signals represent unintended motion of the stylus or device. The received signals are then processed to correct for the unintended motion defined by the motion profile.

In one embodiment, a computer-readable non-transitory storage medium embodies logic that is configured when executed to determine a first correlation between first consecutive edges of a synchronization signal and a pre-determined coefficient vector. The logic is further configured when executed to determine a second correlation between second consecutive edges of the synchronization signal and the pre-determined coefficient vector and synchronize one or more timings for communication between a stylus and a device based at least in part on the first and second correlations.

In one embodiment, a method includes receiving a signal at a stylus. The stylus is operable to wirelessly transmit signals to and receive signals from a device. The stylus includes a plurality of electrodes disposed in a tip of the stylus. The method includes determining a characteristic of the signal, and based at least in part on the characteristics of the signal, a threshold for determining whether to process signals received wirelessly from the device is dynamically adjusted.

Dynamic adjustment of received signal threshold in an active stylus

In one embodiment, an active stylus includes a transmitter configured to transmit electrical signals to a device through a touch sensor of the device. The active stylus also includes a receiver configured to receive electrical signals from the device through the touch sensor of the device. Furthermore, the active stylus includes a controller configured to determine a strength of an electrical signal received by the receiver from the touch sensor of the device and instruct the transmitter to transmit electrical signals to the device at a voltage based at least on the determined strength of the electrical signal received by the receiver.

Growing community of inventors

Menlo Park, CA, United States of America

Vemund Kval Bakken