Patent application number | Description | Published |
20080198151 | DRIVING METHOD AND DRIVING APPARATUS OF LIQUID CRYSTAL DISPLAY - A driving method includes sensing illuminance of ambient light determining a first contrast ratio based on the sensed illuminance, determining a second contrast ratio and a relative ratio of the contrast ratio, determining a gradient of a compensation gamma curve using the relative ratio, determining an average gray of input data signals, and determining the compensation gamma curve. | 08-21-2008 |
20080246903 | Liquid crystal display - A liquid crystal display (LCD) which includes a liquid crystal panel and a temperature-measurement apparatus. The temperature-measurement apparatus includes a temperature sensor which includes a variable-resistance element having a resistance that varies according to the temperature of the liquid crystal panel and a fixed-resistance element connected in series to the variable-resistance element, divides a first input voltage, and outputs a first temperature-dependent voltage that varies according to a temperature of the liquid crystal panel. A voltage divider which divides a second input voltage and outputs a reference voltage is provided. A differential amplifier receives at a first input the first temperature-dependent voltage and receives at a second input the reference voltage and amplifies a difference between the first temperature-dependent voltage and the reference voltage, and provides at an output a second temperature-dependent voltage. | 10-09-2008 |
20080258632 | METHOD FOR DRIVING A LIGHT SOURCE, LIGHT SOURCE DRIVING CIRCUIT THEREOF, LIGHT SOURCE ASSEMBLY HAVING THE LIGHT SOURCE DRIVING CIRCUIT AND DISPLAY APPARATUS HAVING THE SAME - A method of driving a light source driving circuit includes: applying driving signals, each having a reference frequency different than the reference frequency of other driving signals, to respective color light sources, each emitting a color light; generating a sensing signal based on a sensed mixed light emitted from the color light sources; filtering the sensing signal based on the reference frequency of each of the driving signals; generating color signals corresponding to each of the color light sources based on the filtered sensing signal; outputting light quantity control signals based on the color signals; and controlling a duty ratio of each of the driving signals based on the light quantity control signals to apply the driving signals, each having the controlled duty ratio, to the color light sources to control a quantity of the color light emitted from each of the color light sources. | 10-23-2008 |
20090040189 | DISPLAY DEVICE ASSOCIATED WITH TOUCH PANEL, METHOD OF CORRECTING ERRORS OF THE SAME, AND DISPLAY SYSTEM - A display device associated with a touch panel, a method of correcting errors of the same, and a display system in which the display device includes a pixel unit having pixels for displaying an image, a touch-sensing unit having touch-sensing elements for outputting a touch-sensing signal when the touch-sensing elements are touched and a correcting unit correcting the touch-sensing signal outputted from a first touch-sensing element that has been detected to have failed, a storing unit for storing the coordinate corresponding to the first touch-sensing element, a signal-processing unit for determining whether the first touch-sensing element has been touched by detecting whether a second touch-sensing element corresponding to the coordinate adjacent the coordinate of the first touch-sensing element has been touched. | 02-12-2009 |
20090085861 | BACKLIGHT DRIVER AND LIQUID CRYSTAL DISPLAY INCLUDING THE SAME - A backlight driver and a liquid crystal display (LCD) including the same, in which the backlight driver includes an interface unit enabled in response to a first carry signal, receiving serially provided optical data, and outputting a second carry signal; and a plurality of control units controlling one or more light-emitting devices in response to the serially provided optical data. | 04-02-2009 |
20090109166 | LIQUID CRYSTAL DISPLAY AND METHOD OF DRIVING THE SAME - A liquid crystal display (LCD) and a method of driving the same are provided. The LCD includes a liquid crystal panel; and a plurality of light-emitting blocks providing light to the liquid crystal panel, the light-emitting blocks including light-emitting elements and wherein a peak value of current flowing through each of the light-emitting elements is controlled according to operation modes. | 04-30-2009 |
20090109168 | BACKLIGHT DRIVER AND LIQUID CRYSTAL DISPLAY DEVICE INCLUDING THE SAME - A backlight driver and liquid crystal display device including the same are disclosed. The backlight driver, in accordance with an embodiment, includes a driving-voltage-generating unit supplying a driving voltage to a light-emitting unit, or cutting off the supply of the driving voltage to the light-emitting unit, in response to a pulse width modulation signal; a pulse-width-modulation-signal-generating unit supplying the pulse width modulation signal to the driving-voltage-generating unit, and stopping its operation when an error occurs in the light-emitting unit; and an automatic reset unit supplying a reset signal to the pulse-width-modulation-signal-generating unit, when the pulse-width-modulation-signal-generating unit stops its operation, to restart the operation of the pulse-width-modulation-signal-generating unit. | 04-30-2009 |
20090134814 | BACKLIGHT UNIT, DISPLAY DEVICE COMPRISING THE SAME, AND CONTROL METHOD THEREOF - A backlight unit includes a plurality of light source units arranged in a matrix form, a light source controller outputting a dimming signal to control a brightness of the light source units and a latch signal to control a light source unit row of the plurality of light source units to be sequentially driven according to a predetermined scanning period, and a plurality of light source driving units connected to light source unit columns of the plurality of light source units and supplying driving signals corresponding to the dimming signal to the light source units in the light source unit columns. | 05-28-2009 |
20090243989 | DISPLAY APPARATUS - A display apparatus that includes a controller, a gate driver, a data driver, and a gamma voltage generator is presented. The controller generates image data and a data clock to drive a display unit based on original data and an original control signal received from an exterior. The gate driver provides an image data signal to a data interconnection provided in the display unit. The data driver provides a gate signal to a gate interconnection provided in the display unit. The gamma voltage generator generates gamma voltages serving as a reference in response to the data driver providing the gate signal to the display unit. The gamma voltage generator selectively outputs sub-reference voltages, which are divided from an external reference voltage, and a specific voltage, which is generated from the gamma voltage generator, as the gamma voltages. | 10-01-2009 |
20090309858 | LIQUID CRYSTAL DISPLAY AND DRIVING METHOD OF THE SAME - A liquid crystal display (“LCD”) and a driving method of the same are provided. The LCD includes a photo sensor including a ring oscillator having cascade-connected inverters, wherein the output signal of the ring oscillator has a frequency varying according to the ambient luminance. | 12-17-2009 |
20100277519 | Liquid crystal display capable of automatically adjusting gamma value and brightness - A liquid crystal display that is capable of maintaining a consistent display quality regardless of variations in the liquid crystal panel temperature is presented. The liquid crystal display includes a liquid crystal panel that displays an image and a driving circuit that drives the liquid crystal display panel. The liquid crystal display panel has a temperature sensor that senses temperature variation in the liquid crystal panel and outputs a sensing signal. The driving circuit adjusts a gamma value in response to the sensing signal and drives the liquid crystal panel based on the adjusted gamma value. The gamma value is adjusted by measuring a shift in the gamma value and applying a compensation factor that is opposite in polarity but similar in magnitude to the shift. | 11-04-2010 |
20150035877 | BACKLIGHT DRIVER AND LIQUID CRYSTAL DISPLAY INCLUDING THE SAME - A backlight driver and a liquid crystal display (LCD) including the same, in which the backlight driver includes an interface unit enabled in response to a first carry signal, receiving serially provided optical data, and outputting a second carry signal; and a plurality of control units controlling one or more light-emitting devices in response to the serially provided optical data. | 02-05-2015 |