Patent application number | Description | Published |
20100013790 | DISPLAY APPARATUS - An embodiment of the present invention provides a display apparatus including: a first substrate; an optical layer on the first substrate, the optical layer comprising a plurality of pixels for displaying an image and an array of optical sensors for detecting a contact location on the display apparatus; and a contact detector detecting whether or not the display apparatus is touched. | 01-21-2010 |
20100013811 | PHOTO SENSOR AND ORGANIC LIGHT EMITTING DISPLAY USING THE SAME - A photo sensor capable of reducing the distortion of signals output from the photo sensor to output a correct measured value and an organic light emitting display using the same. The organic light emitting display includes a pixel unit formed on a transparent substrate to display an image in response to scan signals and data signals, a scan driver generating the scan signals to transmit the scan signals to the pixel unit, a data driver generating the data signals to transmit the data signals to the pixel unit, and a photo sensor including a sensing unit sensing brightness of ambient light to output a sensing signal and a control unit for receiving the sensing signal to output a brightness control signal for controlling brightness of the image. The sensing unit disposed in a predetermined region of the transparent substrate and includes a first photo diode receiving a first driving power source to generate optical current so that a magnitude of the optical current is controlled in response to the brightness of the ambient light, a first capacitor for storing the optical current, and a first switch coupled between the first driving power source and the first photo diode to perform a switching operation. | 01-21-2010 |
20100096997 | Light sensing circuit and flat panel display including the same - A light sensing circuit for use in auto brightness control (ABC), and a flat panel display including the light sensing circuit. The light sensing circuit includes a first photodiode; a second photodiode which is electrically connected to the first photodiode and includes a shielding film for shielding externally incident light; a first voltage fixing unit which is connected to the first photodiode and the second photodiode and maintains a voltage applied to the first photodiode at a certain value; and an analog-to-digital converter (ADC) which generates a digital value that depends on a current flowing in the first photodiode and the second photodiode. Accordingly, the light sensing circuit can precisely sense the brightness of a surrounding environment and drive a flat panel display with the most suitable brightness. | 04-22-2010 |
20100097334 | LIGHT SENSING CIRCUIT, METHOD OF DRIVING THE SAME, AND TOUCH PANEL INCLUDING THE LIGHT SENSING CIRCUIT - A light sensing circuit, a method of driving the same, and a touch panel including the light sensing circuit, the light sensing circuit including a photodiode generating current according to the brightness of light incident from the outside; a driving transistor having a first electrode to which a first power voltage is applied, a second electrode, and a gate electrode electrically connected to a cathode of the photodiode; a first reset transistor having a first electrode to which an initialization voltage is applied, a second electrode connected to the gate electrode of the driving transistor, and a gate electrode to which a previous scan signal is applied; and a shielding capacitor disposed between the gate electrode of the driving transistor and the cathode of the photodiode. Accordingly, the brightness of light incident on the photodiode can be accurately determined by initializing the cathode of the photodiode by using a constant voltage. | 04-22-2010 |
20100097350 | PHOTO SENSING DEVICE, PHOTO SENSING CIRCUIT, TOUCH PANEL, AND METHOD OF SENSING OUTPUT VALUE OF PHOTO SENSING ELEMENT - A photo sensing device, a photo sensing circuit, a touch panel, and a method of sensing an output value of a photo sensing element, in order to remove the influence of a threshold voltage. The device includes a photo sensing unit generating a sensing current according to an intensity of incident light, a driving unit outputting a driving current according to the sensing current generated by the photo sensing unit, and a scanning unit outputting on a data line the driving current of the driving unit in a first mode corresponding to the photo sensing unit gathering light for a predetermined period of time and outputting the driving current in a second mode corresponding to the photo sensing unit initializing. | 04-22-2010 |
20100097352 | TOUCH SCREEN DISPLAY AND METHOD OF DRIVING THE SAME - A TSD (Touch Screen Display) includes a panel including a plurality of light emitting devices to form an image, and a plurality of photo sensors to capture an image of an object touching the panel; a touch position deriving unit to derive a touch position of the object based on output signals of the photo sensors; and a light emission control unit to derive a probability of a plurality of previous touch positions derived by the touch position deriving unit, predict a next touch position after the plurality of previous touch positions according to the probability, and control at least one of the light emitting devices in a light emission area including the next touch position to emit light. | 04-22-2010 |
20100097354 | LIGHT SENSING CIRCUIT, TOUCH PANEL INCLUDING THE SAME, AND METHOD OF DRIVING THE LIGHT SENSING CIRCUIT - A light sensing circuit of a touch panel includes a photodiode including an anode and a cathode; a driving transistor including a gate electrode connected to the cathode of the photodiode, a first electrode to receive a first ground voltage, and a second electrode; a first switching transistor including a first electrode connected to the second electrode of the driving transistor, a second electrode to output a data signal, and a gate electrode to receive a scan signal; a first capacitor including a first terminal connected to the cathode of the photodiode, and a second terminal; and a voltage compensating unit to apply a compensation voltage to the second terminal of the first capacitor. | 04-22-2010 |
20100097391 | TOUCH SCREEN DISPLAY APPARATUS FOR PERFORMING FLASH MODE AND METHOD OF OPERATING THE APPARATUS - A touch screen display apparatus includes a panel including a light emitting device for displaying a display image and an optical sensor for generating a touch image object; a touch sensing unit on the panel for sensing a touch of a touch object; and a light emission controller for controlling the light emitting device to emit light when a touch of the touch object is sensed by the touch sensing unit. | 04-22-2010 |
20100220069 | Light sensing circuit, method of controlling the same, and touch panel comprising the light sensing circuit - A light sensing circuit, a method of controlling the same, and a touch panel including the light sensing circuit. In the method of controlling the light sensing circuit, including sensing light incident on a photodiode, generating current corresponding to the brightness of the sensed light, amplifying the current using a driving transistor, and outputting the amplified current, the ambient temperature is sensed, and a time period during which the light is sensed by the photodiode or the amplified current is output is controlled by the sensed ambient temperature. Thus, the sensitivity of the light sensing circuit may be constantly maintained without being influenced by the ambient temperature. | 09-02-2010 |
20110001711 | LIGHT SENSING CIRCUIT, TOUCH PANEL INCLUDING THE SAME, AND METHOD OF DRIVING THE SAME - A light sensing circuit includes a photodiode including a cathode electrode and an anode electrode and for receiving light from the outside and generating a current corresponding to the received light, a driving transistor for amplifying the current generated in the photodiode, a capacitor for storing a first initiation voltage transmitted to the driving transistor, a first switching transistor for compensating for a threshold voltage of the driving transistor corresponding to a current scan signal, and a second switching transistor for transmitting the first initiation voltage corresponding to the current scan signal. | 01-06-2011 |
20110050600 | Light sensor circuit and driving method thereof and touch screen panel having the same - A light sensor circuit, includes a light receiving element coupled to a first power supply, a capacitor coupled between the light receiving element and a second power supply, a first transistor including a gate electrode coupled to a first electrode of the capacitor, and a second transistor including a gate electrode coupled to a selection signal line, wherein the first transistor is coupled between the selection signal line and a first electrode of the second transistor, and the second transistor is coupled between a second electrode of the first transistor and an output signal line. | 03-03-2011 |
20110057893 | Touch screen panel - A touch screen panel comprises a glass substrate having a display area and a non-display area, a plurality of sense patterns on the display area, a plurality of metal pads on a periphery of the display area and on the non-display area, a plurality of sense lines on the non-display area, and dummy patterns on an area between the plurality of sense lines on the non-display area. The non-display area is outside a periphery of the display area. Each of the plurality of the sense lines is coupled to one of the plurality of metal pads. The display area and non-display area of the glass substrate respectively correspond to a display area and non-display area of an image display device to which the touch screen panel is provided. | 03-10-2011 |
20110084958 | ORGANIC LIGHT EMITTING DISPLAY AND METHOD OF DRIVING THE SAME - An organic light emitting display is capable of reducing power consumption. The organic light emitting display includes a scan driver for sequentially supplying scan signals to scan lines, a data driver for supplying data signals to data lines in synchronization with the scan signals, pixels located at crossing regions of the scan lines and the data lines, a timing controller for determining a normal driving mode for displaying a normal image and a standby driving mode displaying less information than the normal image, and a power source for supplying a first power and a second power to the pixels, wherein a voltage difference between the first power and the second power in the normal driving mode is a first voltage, and a voltage difference between the first power and the second power is a second voltage different from the first voltage. | 04-14-2011 |
20110102391 | ILLUMINATION SENSING DEVICE HAVING A REFERENCE VOLTAGE SETTING APPARATUS AND A DISPLAY DEVICE INCLUDING THE ILLUMINATION SENSING DEVICE - A reference voltage setting apparatus including: a current generator having a first device to supply a first dark current and a second device to supply a second dark current; a first operational amplifying unit connected to the current generator; and a voltage setting unit connected to the first operational amplifying unit and setting a reference voltage having a compensated offset voltage of the first operational amplifying unit, and an illumination sensing device and a display device including the reference voltage setting apparatus. | 05-05-2011 |
20110122087 | TOUCH SCREEN SYSTEM AND METHOD OF DRIVING THE SAME - A touch screen system includes a touch screen panel which includes driving lines, sensing lines crossing the driving lines, and sensing cells formed at crossing regions of the driving lines and the sensing lines; a driving circuit for sequentially applying driving signals to the driving lines; a sensing circuit for detecting first sensing signals in accordance with changes in mutual capacitances of the sensing cells to generate second sensing signals corresponding to the changes; a processor for determining a touch position based on the second sensing signals from the sensing circuit; and an active stylus separated from the touch screen panel and configured to output an active stylus electric field in synchronization with a driving signal of the driving signals applied to a driving line coupled to a sensing cell of the sensing cells adjacent to the active stylus when the active stylus approaches or contacts the touch screen panel. | 05-26-2011 |
20110128268 | ORGANIC LIGHT EMITTING DISPLAY - An organic light emitting display includes an image display unit having a plurality of pixels, and first and second pixel power lines that receive pixel-driving voltages from first and second power supplies, respectively. The second pixel power lines are interleaved with the first pixel power lines. Adjacent pixels of the same color from among the plurality of pixels provided in the image display unit are coupled to pixel power lines corresponding to different power supplies. This is to solve or mitigate the problem of non-uniform brightness of the entire image display unit due to voltage drops in the pixel power lines. | 06-02-2011 |
20110134056 | Flat panel display integrated with touch screen panel - A FPD integrated with a touch screen panel includes an upper substrate and a lower substrate facing each other, the upper substrate including a display region and first and second non-display regions surrounding the display region, a plurality of sensing patterns on the display region of the upper substrate, a plurality of sensing lines on the first non-display region of the upper substrate, a sealing material on the second non-display region of the upper substrate, the sealing material connecting the upper and lower substrates, and a flexible printed circuit (FPC) bonding pad unit on the second non-display region of the upper substrate, the FPC bonding pad unit including a plurality of bonding pads coupled to the plurality of sensing lines, the bonding pads including a transparent conductive material in regions overlapping the sealing material. | 06-09-2011 |
20110193768 | PIXEL AND ORGANIC LIGHT EMITTING DISPLAY DEVICE USING THE SAME - A pixel includes: an OLED; a first transistor having a first electrode coupled to a power source and a second electrode coupled to the OLED and configured to control a magnitude of current supplied to the OLED; a third transistor having a first electrode coupled a first node and a second electrode coupled to a gate electrode of the first transistor; a capacitor coupled between the first node and a second electrode of the first transistor; a second transistor having a first electrode coupled to the first node and a second electrode coupled to a data line and configured to be turned on when the third transistor is turned off; and a fourth transistor having a first electrode coupled to a gate electrode of the first transistor and a second electrode coupled to a reference power source and configured to be turned on and off concurrently with the second transistor. | 08-11-2011 |
20110221698 | Touch screen panel - A capacitive touch screen panel including a plurality of first sensing patterns connected along a long-side direction of a screen; and a plurality of second sensing patterns connected along a short-side direction of the screen, wherein an area of each of the first sensing patterns is smaller than an area of each of the second sensing patterns. | 09-15-2011 |
20110227888 | FLAT PANEL DISPLAY - A flat panel display including a first substrate comprising an emission region and a non-emission region, a light emission unit on the emission region, a first sensing unit on the non-emission region, and a second sensing unit on the non-emission region, wherein the first and second sensing units are arranged to allow determination of a tilt angle of the flat panel display using light intensities measured by the first and second sensing units. | 09-22-2011 |
20110233387 | Light sensor circuit and driving method thereof - Embodiments provide a light sensor circuit for a flat panel display which improves resolution at low luminance and increases the range of sensible ambient light by divisionally driving a frame period, in which light is sensed, into a plurality of sub-frames, and a method of driving the light sensor circuit. | 09-29-2011 |
20110291115 | ORGANIC LIGHT EMITTING DISPLAY - An organic light emitting display having first pixel power source lines receiving a pixel driving voltage from first power supply sources and second pixel power source lines arranged between the first pixel power source lines and receiving a pixel driving voltage from second power supply sources, the light emitting diode of each of a plurality of pixels included in an image display unit is divided into two, and the divided light emitting diodes are coupled to the different pixel power source lines so that brightness non-uniformity of the image display unit caused by the IR drops of the pixel power source lines is reduced or prevented. | 12-01-2011 |
20120062521 | ACTIVE STYLUS - An active stylus used in a mutual capacitive touch screen system is described. In one aspect, the active stylus includes a shielding unit formed to shield an electric field that forms a closed loop between input and output units of the active stylus, thereby overcoming of oscillation or a decrease in amplitude. | 03-15-2012 |
20120169631 | TOUCH SCREEN PANEL AND DRIVING METHOD THEREOF - A touch screen panel according to an embodiment of the present invention includes: a substrate; a plurality of driving electrodes including first driving patterns and second driving patterns and arranged on the substrate along a first direction; and a plurality of sensing electrodes including first sensing patterns and second sensing patterns and arranged on the substrate along a second direction crossing the first direction, wherein first sensing cells are formed of the first driving patterns and the first sensing patterns and second sensing cells are formed of the second driving patterns and the second sensing patterns. | 07-05-2012 |
20120182254 | TOUCH SCREEN SYSTEM - A touch screen system according to an exemplary embodiment of the present invention includes: a touch screen panel including a plurality of driving electrodes coupled to a plurality of driving lines that extend in a first direction and a plurality of sensing electrodes coupled to a plurality of sensing lines that extend in a second direction crossing the first direction, the driving electrodes and the sensing electrodes being alternately arranged so as not to overlap with each other; and an active stylus separated from the touch screen panel, the active stylus configured to output an electric field in synchronization with driving signals that are applied to the driving lines coupled to the driving electrodes that are adjacent to the active stylus, wherein the driving electrodes and the sensing electrodes have different areas. | 07-19-2012 |
20120229416 | ELECTROSTATIC CAPACITY TYPE TOUCH SCREEN - An electrostatic capacity type touch screen included in an image display apparatus is provided. The electrostatic capacity type touch screen includes an active touch region on a screen divided into a plurality of regions and a plurality of conductive sensing patterns formed in the divided regions to detect capacitance. Coupling of the conductive sensing patterns among the divided regions is broken. | 09-13-2012 |
20120262411 | TOUCH SCREEN SYSTEM AND METHOD OF DRIVING THE SAME - A touch screen system includes a touch screen panel including first lines, second lines crossing the first lines, a plurality of sensing cells formed at the crossing regions between the first lines and the second lines, a driving circuit for sequentially applying a driving signal to the first lines, a first sensing circuit for receiving capacitance change information sensed by the first lines, and generating a first sensing signal corresponding to the capacitance change information, a selecting unit for selectively coupling the first lines to the driving circuit or the first sensing circuit, a second sensing circuit for receiving the capacitance change information sensed by the sensing cells from the second lines and generating a second sensing signal corresponding to the capacitance change information, and a processing unit for receiving a sensing signal from the first sensing circuit and/or the second sensing circuit and determining a detected touch position. | 10-18-2012 |
20140104200 | TOUCH SENSING SYSTEM - A touch sensing system includes: a first touch sensor; a second touch sensor; and a control IC configured to control the first touch sensor and the second touch sensor. | 04-17-2014 |
20140176493 | METHOD OF SENSING A TOUCH AND TOUCH SENSING SYSTEM - A method of sensing a touch is provided, the method including: generating, at a pressure detector, a first sensing signal by detecting a pressure of a touch input by a user; generating, at a position detector, a second sensing signal by detecting a position of the touch input by the user; and removing a noise of the second sensing signal based on the first sensing signal. | 06-26-2014 |
20140313157 | TOUCH SENSING APPARATUS AND TOUCH SENSING METHOD USING THE SAME - A touch sensing apparatus includes a touch screen panel including first electrodes along a first direction and second electrodes along a second direction crossing the first direction to form capacitances with the first electrodes, a driving circuit configured to supply a driving signal to the first electrodes; and a sensing circuit configured to detect output sensing signals from the second electrodes and recognize a touch input based on the output sensing signals. The sensing circuit includes a switching unit configured to modulate the output sensing signals by providing codes as respective input sensing signals to the second electrodes, an amplifying unit configured to amplify the modulated sensing signals, an analog-digital conversion unit configured to convert the amplified sensing signals into digital sensing signals, and a controller configured to demodulate the digital sensing signals and detect a touch input and its position from the demodulated sensing signals. | 10-23-2014 |
20140333577 | TOUCH SENSING DEVICE AND DRIVING METHOD THEREOF - A touch sensing device includes: a capacitive-type touch sensor, a pressure sensor, a touch coordinate detecting unit, and a direction vector calculating unit. The capacitive-type touch sensor is configured to detect a first aspect of a touch input. The pressure sensor is configured to detect a second aspect of the touch input. The touch coordinate detecting unit is configured to, based on the first and second aspects, determine a touch coordinate associated with the capacitive-type touch sensor and a touch coordinate associated with the pressure sensor. The direction vector calculating unit is configured to determine a direction vector based on the respective touch coordinates. | 11-13-2014 |