Patent application number | Description | Published |
20090116983 | Reciprocating compressor - In a compressor, a motor includes a stator and a moving member that reciprocates. A frame supports the stator and a conductivity member flows at least a portion of magnetic flux flowing away from the stator back to the stator. Accordingly, the reciprocating compressor has enhanced energy efficiency. | 05-07-2009 |
20120120128 | DISPLAY APPARATUS AND METHOD OF DRIVING THE SAME - A display apparatus includes a display panel including nxm array of pixels and which sequentially drives the pixels from pixels in a first row to pixels in an n-th row, a panel driving circuit which sequentially applies first, second, third or fourth image data to the display panel, a backlight unit including a first light source disposed adjacent to the pixels in the first row and a second light source disposed adjacent to the pixels in the n-th row, and a backlight control circuit which divides each of first and second time periods into first, second, third and fourth blinking time periods, and applies a control signal to the backlight unit, where the first time period corresponds to two frames during which the first and second image data are applied, and the second time period corresponds to two frames during which the third and fourth image data are applied. | 05-17-2012 |
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 |
20130113390 | DC-DC CONVERTER AND LIGHT EMITTING DIODE DRIVING DEVICE INCLUDING THE SAME - A direct current to direct current converter includes: an input terminal; an output terminal having voltage higher than the input terminal; a coupled inductor boost cell including a coupled inductor connected to the input terminal, a switch connected to the coupled inductor, and an output diode connected to the output terminal; and a clamp and energy transfer cell including a clamp diode connected to the coupled inductor, a clamp capacitor connected to the clamp diode, and an energy transfer diode connected to the output diode. | 05-09-2013 |
20130257710 | IMAGE DISPLAY SYSTEM AND METHOD OF DRIVING THE SAME - An image display system includes a sensor part, a camera part, and an image display part. The sensor part is configured to sense a presence of a user and output a sensing signal. The camera part is configured to be controlled by the sensing signal, detect an eye direction of the user, and output a detecting signal. The image display part is configured to be operated in one of first, second, and third modes on the basis of the sensing signal and the detecting signal. The sensor part and the camera part are operated independently from the image display part. Power consumption becomes smaller in order of the first mode, the second mode, and the third mode. | 10-03-2013 |
20130278790 | IMAGE DISPLAY SYSTEM AND METHOD OF DRIVING THE SAME - An image display system includes a camera part and an image display part. The image display part includes a user analyzer, a gamma corrector, a gamma voltage generator, and a display panel. The camera part takes a picture of a user and generates a user image signal. The user analyzer calculates the user's viewing direction based on the user image signal. The gamma corrector generates a correction gamma value based on the viewing direction. The gamma voltage generator generates a gamma voltage based on the correction gamma value, and the display panel displays an image corresponding to the gamma voltage. Accordingly, the image display system provides the image having an optimized gamma curve to the user in real time even without a separate input from the user. | 10-24-2013 |
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 |
20150029170 | METHOD OF DRIVING A DISPLAY PANEL AND DISPLAY DEVICE PERFORMING THE SAME - A method of driving a display panel is disclosed. In one aspect, the display panel includes a plurality of pixels, each of the pixels including a first transistor connected to a first gate line and a pixel electrode and a second transistor connected to a second gate line and the pixel electrode. The method including alternately providing the first gate line with a gate signal and a reverse bias signal and alternately providing the second gate line with the gate signal when the first gate line is provided with the reverse bias signal and the reverse bias signal when the first gate line is provided with the gate signal. | 01-29-2015 |