Patent application number | Description | Published |
20080303767 | VIDEO DISPLAY DRIVER WITH GAMMA CONTROL - Voltage generator circuitry for providing a plurality of voltages for use in gamma compensation of a video signal. | 12-11-2008 |
20110267305 | INTEGRATED CAPACITIVE SENSING AND DISPLAYING - A display device having an integrated capacitive proximity sensor comprises a plurality of sensor electrodes disposed as part of a display element of the display device. The plurality of sensor electrodes is configured for performing both sensor and display functions of the display device. The display device also comprises a sensor drive mechanism coupled with the plurality of sensor electrodes and configured for driving a first electrical signal on a first at least one sensor electrode of the plurality of sensor electrodes. The sensor drive mechanism comprises at least one memory element that is configured for selecting drive excitation information for the first at least one sensor electrode. The display device also comprises a display drive mechanism coupled with the plurality of sensor electrodes and configured for driving a second electrical signal on a second least one sensor electrode of the plurality of sensor electrodes. | 11-03-2011 |
20120068949 | SYSTEMS AND METHODS FOR SIGNALING AND INTERFERENCE DETECTION IN SENSOR DEVICES - An input device processing system comprises a sensor module that transmits a first transmitter signal with a transmitter electrode and receives a resulting signal with a receiver electrode. The first transmitter signal comprises a first transmitter frequency, and the resulting signal comprises effects corresponding to the first transmitter signal. A demodulation module demodulates the resulting signal to produce a first signal (e.g., an upper sideband signal) and a second signal (a lower sideband signal), selectably determines a first measurement of a change in capacitive coupling between the transmitter electrode and the receiver electrode based on at least one of the first and second signals, and determines positional information for an input object based on the first measurement. | 03-22-2012 |
20120068966 | SYSTEMS AND METHODS FOR SIGNALING AND INTERFERENCE DETECTION IN SENSOR DEVICES - An input device processing system comprises a sensor module that transmits a first transmitter signal with a transmitter electrode and receives a resulting signal with a receiver electrode. The first transmitter signal comprises a first transmitter frequency, and the resulting signal comprises effects corresponding to the first transmitter signal. A demodulation module demodulates the resulting signal to produce a first signal (e.g., an upper sideband signal) and a second signal (a lower sideband signal), selectably determines a first measurement of a change in capacitive coupling between the transmitter electrode and the receiver electrode based on at least one of the first and second signals, and determines positional information for an input object based on the first measurement. | 03-22-2012 |
20130021229 | DISPLAY DRIVER - An apparatus is provided, which includes a driving circuit. The driving circuit includes a gamma reference source and a liquid crystal display (LCD) source driver circuit. A first resistor string is provided. A plurality of digital-to-analog converters (DACs) are provided, where each DAC is coupled to the first resistor string. An output circuit having a second resistor string is provided so as to output a plurality of reference voltages. The LCD source driver circuit is coupled to the output circuit of the gamma reference source. The source driver is configured to receive the plurality of reference voltages, wherein the plurality of reference voltages are arranged in a first sequence during a positive polarity cycle and are arranged in a second sequence during a negative polarity cycle. The fifth sequence is an inverse of the fourth sequence. | 01-24-2013 |
20130082998 | DISPLAY DEVICE VOLTAGE GENERATION - A voltage generator circuit comprises a resistor string, a drive mechanism configured to drive a drive signal, a voltage feedback network, and a voltage tap point. The voltage tap point is located along the resistor string. The voltage tap point is configured to be selectively coupled simultaneously with the drive mechanism and the voltage feedback network, such that an output of the voltage tap point is selectively coupled with the drive mechanism via the voltage feedback network. | 04-04-2013 |
20130127779 | FLEXIBLE TIMING AND MULTIPLEXING FOR A DISPLAY DEVICE COMPRISING AN INTEGRATED CAPACITIVE SENSING DEVICE - Embodiments of the invention generally provide an input device that simultaneously transmits a multiplexed signal across two or more transmitter electrodes used in touch detection. The multiplexed includes two or more component signals that are transmitted on respective electrodes (or channels). The component signals are then decoded and correlated to indicate a positional location of an input object. Various multiplexing schemas—e.g., code division multiplexing, frequency division multiplexing, orthogonal frequency division multiplexing, and the like—may be used to generate the multiplex signal and then demultiplex the received results. | 05-23-2013 |
20140002433 | VOLTAGE INTERPOLATING CIRCUIT | 01-02-2014 |
20140198087 | METHOD AND CIRCUIT TO OPTIMIZE N-LINE LCD POWER CONSUMPTION - Embodiments of the invention generally provide an input device that includes one or more source drivers that are coupled to a display screen. Specifically, one of the source drivers may be coupled to a plurality of source lines (or column lines) on the display screen which the source driver uses to set voltages associated with one or more sub-pixels that determine the color displayed by the pixel. When driving voltages onto subsequent source lines, the input device may precharge the source driver using a latent voltage stored on the source lines. That is, if the source line was previously driven to a particular voltage by the source driver, the input device uses that latent voltage to precharge the output of the source driver to the same voltage. The source driver may then adjust its output to a desired voltage and drive the desired voltage onto the source line and sub-pixel. | 07-17-2014 |