Patent application number | Description | Published |
20080218489 | DISPLAY DEVICE AND METHOD OF DRIVING THE SAME - A method of driving a display device having a plurality of pixels, a plurality of sensing units, and a plurality of sense data lines to which the plurality of sensing units are connected, includes: reading sense signals from the sense data lines; determining whether or not the display has been touched and the number of touches, generating X-axis and Y-axis position data based on the sense signals, and determining, when the quantity of touches is plural, whether a plurality of touches are sequentially generated, and the touch position of each. | 09-11-2008 |
20080252558 | COLOR DISPLAY APPARATUS - Disclosed herein is a color display apparatus which has a pixel pattern including a plurality of repeating units of a pixel array, wherein each of the plurality of repeating units of the pixel array is composed of at least five sub-pixels while including at least one sub-pixel from a first to fourth sub-pixel, respectively, the first sub-pixel representing a red color (R), the second sub-pixel representing a green color (G), the third sub-pixel representing a blue color (B), and the fourth sub-pixel representing a mixed color of at least two colors from among the R, G, and B, and each of the plurality of repeating units of the pixel array corresponds to at least two image pixels. | 10-16-2008 |
20080273000 | METHOD OF PREVENTING FLICKER, CIRCUIT FOR PERFORMING THE METHOD, AND DISPLAY APPARATUS HAVING THE CIRCUIT - A method for preventing flicker in a display apparatus, a circuit for performing the method and a display apparatus which includes the circuit. The method includes displaying an inspection image on a plurality of sensing pixels formed in a display panel of the display apparatus, sensing an amount of light of the inspection image and outputting sensing signals corresponding to the amount of light of the inspection image, adding the sensing signals by every frame, detecting a maximum value and a minimum value of sum values of the sensing signals, producing a flicker index using the maximum value and the minimum value detected, comparing the flicker index with a predetermined threshold value such that a present common voltage applied to the display panel is maintained when the flicker index is smaller than the threshold value. Therefore, the display quality of the display apparatus may be improved. | 11-06-2008 |
20090027425 | DISPLAY DEVICE AND DRIVING METHOD FOR DISPLAY DEVICE - A display device includes: a display panel which comprises sub-pixels including an R sub-pixel, a G sub-pixel, a B sub-pixel and a W sub-pixel and disposed in a matrix form, a gate line and a data line which insulatingly cross each other and transmit a driving signal to the sub-pixels; a driver connected to the gate line and the data line; and a signal controller which comprises a signal converter including a W extracting unit to convert R, G and B image signals into R, G, B and W image signals and a rendering unit to render the R, G, B and W image signals so that eight sub-pixels adjacent in an extending direction of the gate line display three pixels, and controls the driver to apply rendered image signals to the display panel. | 01-29-2009 |
20090040214 | SIGNAL PROCESSOR, LIQUID CRYSTAL DISPLAY DEVICE INCLUDING THE SAME, AND METHOD OF DRIVING LIQUID CRYSTAL DISPLAY DEVICE - A liquid crystal display device includes a signal processor using an (n−1)-th conversion signal corresponding to an (n−1)-th raw image signal of an (n−1)-th frame to correct an n-th raw image signal of an n-th frame, and outputting an n-th corrected image signal, the (n−1)-th raw image signal. The n-th raw image signal, and the n-th corrected image signal each have ‘a’ bits and the (n−1)-th conversion signal has ‘b’ bits. The ‘b’ bits is smaller than the ‘a’ bits (a>b). A liquid crystal panel displays an image corresponding to the n-th corrected image signal. | 02-12-2009 |
20090146964 | TOUCH SENSING DISPLAY DEVICE AND DRIVING METHOD THEREOF - In a touch sensing display device, a plurality of sensor scanning lines extend in a first direction and sequentially receive a first voltage, and a plurality of sensor data lines extend in a second, different, direction. A plurality of sensing elements are formed in regions defined by the sensor scanning lines and the sensor data lines, and each sensing element transmits the first voltage from a corresponding sensor scanning line to a corresponding sensor data line responsive to an external touch. A sensing signal processor converts voltages of the sensor data lines into sensing data, and, a touch determining unit processes the sensing data corresponding to the sensor scanning lines by at least one scanning line to determine positions of touch regions generated during at least one frame. | 06-11-2009 |
20090207124 | DISPLAY DEVICE AND PORTABLE TERMINAL HAVING THE SAME - In accordance with one or more embodiments of the present disclosure, a display device includes a driver, a main display panel that receives an image signal from the driver to display an image and that is substantially fixed to the driver, a backlight assembly that is disposed between the main display panel and the driver to radiate light to a rear surface of the main display panel, and a sub-display panel that receives a image signal from the driver to display an image and that can be moved. The display device includes a first mode, in which the sub-display panel is disposed to be opposite to a rear surface of the main display panel, and a second mode, in which the sub-display panel is disposed to be opposite to a front surface of the main display panel. | 08-20-2009 |
20100020029 | TOUCH SCREEN DISPLAY DEVICE AND DRIVING METHOD OF THE SAME - A touch screen display device and a driving method of the same are provided. The touch screen display device includes a touch screen display panel including a plurality of first sensing lines that extend in a first direction, a plurality of second sensing lines that extend in a second direction and cross the first direction, and a plurality of touch sensing elements respectively arranged at areas where the first sensing lines and the second sensing lines cross each other; and a read-out unit that receives output signals of the respective first sensing lines and second sensing lines, reading at least one sensing position, and outputting one of the at least one read sensing positions as a touch position, wherein if the number of sensing positions of the current frame is equal to or greater than two, the read-out unit compares the at least two sensing positions of the current frame with a touch position of the previous frame, and outputs the sensing position that is closest to the touch position of the previous frame as a touch position of the current frame. | 01-28-2010 |
20100214203 | LIQUID CRYSTAL DISPLAY DEVICE INCLUDING SENSING ELEMENT - A liquid crystal display includes a first panel, a second panel facing the first panel and spaced apart from the first panel, a liquid crystal layer disposed between the first panel and the second panel, a variable capacitor having a capacitance that varies by a touch and generating a control voltage that has a magnitude depending on the capacitance, and a sensing element disposed on the second panel and generating a sensing signal based on the control voltage. | 08-26-2010 |
20100253640 | TOUCH SCREEN DISPLAY DEVICE AND METHOD OF DRIVING THE SAME - A touch screen display device includes; a touch screen display panel including; first sensing lines which extend in a first direction, second sensing lines which extend in a second direction , and a plurality of touch sensors located at a plurality of sensing positions, each of which provides touch data or untouch data, a readout unit which reads the touch data or the untouch data and outputs the read data as sensing data corresponding to each of the sensing positions, and a sensing unit which groups the sensing positions into at least one pre-touch areas using the sensing data and which recognizes at least one touch positions using the pre-touch areas, wherein when first and third sensing positions from among first through third sensing positions provide the touch data while the second sensing position provides the untouch data, the sensing unit recognizes the untouch data as the touch data. | 10-07-2010 |
20100253644 | TOUCH SENSITIVE DISPLAY DEVICE AND DRIVING APPARATUS AND METHOD THEREOF - A display device includes a display panel, a plurality of pixels formed on the display panel, a plurality of sensing units formed on the display panel and generating sensor output signals in response to a touch exerted on the display panel, a sensing signal processor receiving and processing an analog sensor data signal originated from the sensor output signals to generate a digital sensor data signal, a first touch-determination unit detecting whether a touch exists based on the digital sensor data signal for a plurality of frames, and operating in a power saving mode, and a second touch-determination unit detecting whether and where a touch exists based on the digital sensor data signal for the plurality of frames, and operating in a normal mode. The display device includes hardwired logic units for detecting the touch, it detects the touch using the hardwired logic units in the power saving mode and converts the operation mode to the normal mode when the touch is detected, thus reducing power consumption. | 10-07-2010 |
20110074722 | TOUCH SENSITIVE DISPLAY DEVICE AND METHOD THEREOF - The present invention relates to a touch sensitive display device, the display device including a display panel unit, a sensing unit formed on the display panel unit, receiving a sensor control signal, and generating a sensor data signal based on a touch exerted on the display panel unit, an output unit generating a sensing signal based on the sensor data signal from the sensing unit, and a compensation unit adjusting the sensor control signal such that the sensing signal is bounded in a predetermined range. | 03-31-2011 |