Patent application number | Description | Published |
20110147102 | OBJECT DETECTION DEVICE - A device for detecting the presence of an object is provided. The device includes a light source, a current controller coupled to the light source, a sensor and a pattern detection engine. The current controller sets to provide the light source with a drive current having a pattern. The sensor is operable to receive light, notably light reflected from an object at the detection area and subsequently generates a signal in response to the light received. The pattern detection engine receives the signal from the sensor and subsequently reports the presence of the object upon determining the presence of the pattern in the signal. The object detection system is further configured to provide a navigation operation when an object is detected at the detection area. | 06-23-2011 |
20120110662 | User Indentification with Capacitive Touchscreen - Disclosed herein are various embodiments of means and methods for verifying or authorizing one or more verified or authorized users to operate or use an electronic device containing a capacitive or other type of touchscreen or touch panel. Images are acquired from the touchscreen or touch panel and processed to determine first characteristics corresponding to fingers, hands or hand portions placed thereon. If the first characteristics match stored second characteristics with a sufficient degree of similarity, the user is identified as an authorized or verified user and then permitted to operate or use the electronic device. | 05-03-2012 |
20120182225 | Detection of Predetermined Objects with Capacitive Touchscreens or Touch Panels - Various embodiments of systems, devices, components and methods of detecting the presence of at least one predetermined object held against a capacitive touchscreen by a user's finger or hand are disclosed. The predetermined object is held or placed against a touchscreen or touch panel, and sensed mutual capacitance signals are routed to a processor. The processor determines whether the sensed signals correspond to the at least one predetermined object on the basis of one or more predetermined ranges of mutual capacitances corresponding to the predetermined object, where the predetermined range of mutual capacitances does not correspond to a user's finger or hand. Other characteristics of the predetermined object may also be determined, such as the object's shape, orientation or electrical resistance. | 07-19-2012 |
20120182252 | Differential Capacitive Touchscreen or Touch Panel - Various embodiments of differential cells for touchscreens or touch panels in capacitive sensing systems are disclosed. The differential circuit topologies of individual cells forming an array of such cells in a touchscreen or touch panel are configured to cancel common mode noise appearing on the multiple sense lines contained in each cell, and can result in lower power consumption, enhanced touch or near-touch sensitivity for a touchscreen or touch panel, and increased immunity from noise. | 07-19-2012 |
20120182253 | Capacitive Touchscreen or Touch Panel with Fingerprint Reader - Various embodiments of a capacitive touchscreen or touch panel having dual finger or hand navigation and fingerprint reading capabilities. In one embodiment, fingerprints are read and processed by the same capacitive touchscreen controller that reads and processes capacitively-sensed finger or hand touches made across the touchscreen or touch panel. A small portion of the capacitive touchscreen or touch panel is dedicated to reading an authorized user's fingerprints, while a larger or main portion of the capacitive touchscreen or touch panel is dedicated to sensing a user's finger or hand navigation across the touchscreen or touch panel. | 07-19-2012 |
20120293445 | Noise Blanking for Capacitive Touch Displays - Disclosed are various embodiments of a capacitive touchscreen or touch panel system comprising a controller operably connected to a first plurality of drive electrodes and a second plurality of sense electrodes. The controller includes a noise disruption detector circuit, a user noise source detector/anticipator circuit, clock control logic circuitry operably connected to the noise disruption detector circuit and to the user noise source detector/anticipator circuit, at least one static-clocked digital filter circuit operably connected to and controlled by the clock control logic circuitry, a central processing unit (CPU) operably connected to the clock control logic circuitry, firmware operably connected to the CPU; and touch position circuitry configured to deliver signals indicative of touch positions on the touchscreen to a host controller. The controller is configured to employ at least one of the CPU and the firmware to cause the clock control logic circuitry to inhibit operation of the digital filter circuit in response to a signal representative of excessive noise levels being provided by either the noise disruption detector circuit or the user noise source detector/anticipator circuit. | 11-22-2012 |
20120293446 | Automatic Gain Control for Capacitive Touch Panel Sensing System - Disclosed are capacitive touchscreen or touch panel systems, devices and methods which increase the dynamic range of touches that may be detected on a capacitive touch screen or touch panel. Increased dynamic range is provided by employing automatic gain control methodologies and circuitry to process signals corresponding to individual mutual capacitance cells in a touch screen or touch panel. | 11-22-2012 |
20130135245 | On-Chip Power Down Generation for LDO-Based Touchscreen Controllers - Various embodiments of methods and devices are provided for a mutual capacitance touchscreen controller comprising a first on-chip low drop out regulator (LDO) configured to receive and regulate as a first input thereto an input supply voltage (VSUPPLY), and to provide as an output therefrom a first regulated output voltage (VDDA). A first comparator in the controller is configured to receive as first and second inputs thereto VSUPPLY and VDDA and to provide as an output therefrom a signal EN, EN being provided to the first LDO as a second input thereto. The first LDO is configured to operate in a first off mode and is turned off by signal EN when the difference between VSUPPLY and VDDA is less than a predetermined threshold. | 05-30-2013 |