Patent application number | Description | Published |
20140028534 | DISPLAY DEVICE - A substantially rectangular display panel includes a first edge extending in a first major axis direction of the rectangular shape and a second edge extending in a second major axis direction of the rectangular shape, the second direction being different from the first direction. The display panel includes: a plurality of gate lines extending in the first direction; and a gate lines driver including a plurality of main stages sequentially connected to each other and configured for outputting gate signals to the gate lines, where the plurality of stages further includes one or more dummy stages arranged in a row along the second edge and not connected to the plurality of gate lines, and where a layout arrangement of a plurality of thin film transistors included in the main stage is different from a corresponding layout arrangement of corresponding thin film transistors included in the at least one dummy stage. | 01-30-2014 |
20140218655 | LIQUID CRYSTAL DISPLAY - A display device includes a gate line and a data line crossing the gate line. The display device further includes a first switching element and a second switching element each connected to the gate line and the data line. The display device further includes a first sub-pixel electrode and a second sub-pixel electrode connected to the first switching element and the second switching element, respectively. The display device further includes a reference voltage line for transmitting a reference voltage, a first portion of the first reference voltage line overlapping a first edge of the first sub-pixel electrode, a second portion of the first reference voltage line overlapping a second edge of the first sub-pixel electrode opposite the first edge of the first sub-pixel electrode. The display device further includes a third switching element connected to the gate line, the first sub-pixel electrode, and the reference voltage line. | 08-07-2014 |
20150042939 | LIQUID CRYSTAL DISPLAY - A liquid crystal display includes: a thin film transistor array panel; a counter panel opposite to the thin film transistor array panel; a liquid crystal layer between the thin film transistor array panel and the counter panel; and pixel electrodes in the thin film transistor array panel, where each of the pixel electrodes includes a first sub-pixel electrode and a second sub-pixel electrode, where each of the first and second sub-pixel electrodes is divided into sub-regions by domain dividers, which controls pretilt angles of liquid crystal molecules of the liquid crystal layer, vertically adjacent pixel electrodes includes an upper pixel electrode and a lower pixel electrode, and the pretilt angles of the liquid crystal molecules in two bottom sub-regions of the second sub-pixel electrode of the upper pixel electrode and in two top sub-regions of the first sub-pixel electrode of the lower pixel electrode are opposite to each other. | 02-12-2015 |
20150160524 | LIQUID CRYSTAL DISPLAY - A liquid crystal display includes a substrate, a gate line, a data line, first and second reference voltage lines disposed on the substrate, first and second subpixel electrodes disposed in one pixel area, and first to third switching elements. The first and second reference voltage lines apply first and second reference voltages. The first and second subpixel electrodes include a plate portion and a plurality of branch portions extending from the plate portion. The first and second reference voltage lines include a first portion overlapping the first subpixel electrode and the second subpixel electrode. The first portion overlaps the plate portion of the first and second subpixel electrodes. A voltage difference between the first subpixel electrode and a common voltage is larger than a voltage difference between the second subpixel electrode and the common voltage. | 06-11-2015 |
20150206940 | SEMICONDUCTOR DEVICE AND METHOD FOR PRODUCING SAME - The aim of the present invention is to provide a semiconductor device containing a graphene p-n vertical tunneling-junction diode by assessing the optical and electrical characteristics of a graphene p-n junction produced by varying the doping concentration. The semiconductor device includes first graphene of a first doping type, and second graphene of a second doping type different from the first doping type, which is arranged on the first graphene and is in contact therewith. | 07-23-2015 |
Patent application number | Description | Published |
20130026926 | BACKLIGHT UNITS AND CURRENT CONTROL METHODS THEREOF - A backlight unit including: at least one light emitting diode (“LED”) string having an anode, which receives a string current, and a chassis-grounded cathode; and a current source control unit which receives a driving current and outputs the string current to the at least one LED string, where the current source control unit senses the driving current and compensates for the string current based on the sensed driving current and a reference voltage. | 01-31-2013 |
20130313985 | METHOD OF DRIVING A LIGHT SOURCE, LIGHT SOURCE APPARATUS FOR PERFORMING THE METHOD AND DISPLAY APPARATUS HAVING THE LIGHT SOURCE APPARATUS - A method of driving a light source includes outputting a variable driving voltage to a light source part, sensing a first voltage based on the driving voltage and developed at a first end of the light source part, sensing a second voltage developed at a second end of the light source part due to current passing through the light source part and adjusting the driving voltage while using the first and second voltages so that power consumption by the light source part is substantially constant irrespective of temperature of the light source part and/or irrespective of a duty cycle ration being used to drive the light source part. Thus, a luminance of the light source part may be maintained at substantially uniform levels. | 11-28-2013 |
20140145626 | BACKLIGHT UNIT AND DISPLAY DEVICE HAVING THE SAME - In a display device, a backlight unit including a power converter configured to generate a light source driving voltage in response to a voltage control signal, a plurality of light emitting diode strings each configured to receive the light source driving voltage through an end thereof, and a controller connected to the other end of each of the plurality of light emitting diode stringsand configured to generate a plurality of current control signals used to control a current flowing through each of the plurality of light emitting diode strings and the voltage control signal. The controller is configured to generate the voltage control signal in response to a current control signal from among the plurality of current control signals, which is applied to a light emitting diode string configured to receive a lowest forward driving voltage among the plurality of light emitting diode strings. | 05-29-2014 |
20140192102 | BACKLIGHT UNIT AND DISPLAY DEVICE HAVING THE SAME - A backlight unit includes a power converter configured to generate a light source driving voltage in response to a voltage control signal, a plurality of light emitting diode strings, where each of the light emitting diode strings receives the light source driving voltage through a first terminal thereof, a plurality of transistors corresponding to the light emitting diode strings, where each of the transistors includes: a first electrode connected to a second terminal of a corresponding light emitting diode string thereof; a second electrode; and a control electrode, and a controller connected to the control electrode and the second electrode, where the controller outputs a plurality of current control signals to control electrodes of the transistors and generate the voltage control signal, where the controller generates an over-current detection signal when any one of the current control signals has a pulse width greater than a predetermined reference width. | 07-10-2014 |
20150221249 | BACKLIGHT UNIT AND DISPLAY APPARATUS HAVING THE SAME - A backlight unit including, a controller configured to generate a control signal, a power converter configured generate a light-source voltage in response to the control signal, and at least one light emitting diode string connected between a first node and a second node and supplied with the light-source voltage from the first node, wherein the controller includes a current controller configured to adjust a current flow through the light emitting diode string, and an overvoltage controller connected between the light emitting diode string and the current controller, including a passive element, wherein the overvoltage controller is configured to connect the passive element between the second node and the current controller when a voltage of the second node of the light emitting diode is higher than a reference voltage. | 08-06-2015 |
Patent application number | Description | Published |
20100020057 | POWER CIRCUIT AND LIQUID CRYSTAL DISPLAY HAVING THE SAME - A power circuit for a liquid crystal display includes a voltage divider which generates a voltage-divided voltage between a first power source and a second power source, an operational amplifier which receives the voltage-divided voltage to output a driving voltage, a first switch connected between the first power source and a common node, and a second switch connected between the second power source and the common node. The first switch provides a first current path between the first power source and the common node in response to the driving voltage, and the second switch provides a second current path between the second power source and the common node in response to the driving voltage. | 01-28-2010 |
20100032677 | DISPLAY DEVICE - A display device includes gate lines; data lines; charge control lines each including a charge control voltage input pad; first and second thin film transistors (TFTs) each including control and input electrodes connected to the gate and data lines, respectively; a first liquid crystal capacitor connected to an output electrode of the first TFT; a second liquid crystal capacitor connected to an output electrode of the second TFT; a charge control TFT including a control electrode and an input electrode connected to one of the charge control lines and the second pixel electrode, respectively; and a charge-down capacitor connected to an output electrode of the charge control TFT. A duration time of a turn-on voltage pulse applied to the charge control TFT is different from a duration time of a turn-on voltage pulse applied to the first TFT transistor or the second TFT. | 02-11-2010 |
20100033470 | DISPLAY DEVICE AND DRIVING METHOD THEREOF - A display device includes a first unit pixel disposed in a first pixel column and a first pixel row, and a second unit pixel disposed in the first pixel column and a second pixel row adjacent to the first pixel row, and first and second gate lines extending in a row direction and having gate voltage input pads at a terminal portion thereof. First and second data lines extend in a column direction and are connected to the first unit pixel and the second unit pixel, respectively. A first charge control line extends in the row direction and has a charge control gate voltage input pad disposed at a terminal portion thereof. The first gate line is connected to the first unit pixel and the second gate line is connected to the second unit pixel. The first gate line and the second gate line simultaneously receive a same gate pulse. | 02-11-2010 |
20100157190 | DISPLAY DEVICE - A display device having a reduced repair line length and a reduced repair unit to reduce the wire resistance of the repair line and the repair unit. The display device includes: a single flexible circuit film; a circuit board connected to the flexible circuit film; and a thin film transistor array panel connected to the flexible circuit film and having a display area and a peripheral area enclosing the display area. The display device also includes a single driving circuit chip disposed on the flexible circuit film; a repair line and a repair bar disposed in the peripheral area of the thin film transistor array panel; a repair amplifier disposed on the driving circuit chip and connected to the repair line and the repair bar. A repair input line connects the repair bar and the repair amplifier and a repair output line connects the repair amplifier and the repair line. | 06-24-2010 |