Patent application number | Description | Published |
20130345464 | I-AND II-TYPE CRYSTALS OF L-A-GLYCERYL PHOSPHORYL CHOLINE, AND METHOD FOR PREPARING SAME - The present invention relates to I- and II-type crystals of L-α-glyceryl phosphoryl choline, and to a method for preparing same. More particularly, the present invention relates to noble I- and II-type anhydride crystals of L-α-glyceryl phosphoryl choline, which have a higher purity than conventional liquid L-α-glyceryl phosphoryl choline, and one advantage of which is that formulations and dosages of pharmaceuticals are easily modified, and another advantage of which is that the hygroscopicity of the crystals are much lower than that of conventional polymorphic crystals, providing excellent stability during storage. The present invention also relates to a method for preparing the I- and II-type crystals of L-α-glyceryl phosphoryl choline. | 12-26-2013 |
20150065741 | I-AND II-TYPE CRYSTALS OF L-A-GLYCERYL PHOSPHORYL CHOLINE, AND METHOD FOR PREPARING SAME - The present invention relates to I- and II-type crystals of L-α-glyceryl phosphoryl choline, and to a method for preparing same. More particularly, the present invention relates to noble I- and II-type anhydride crystals of L-α-glyceryl phosphoryl choline, which have a higher purity than conventional liquid L-α-glyceryl phosphoryl choline, and one advantage of which is that formulations and dosages of pharmaceuticals are easily modified, and another advantage of which is that the hygroscopicity of the crystals are much lower than that of conventional polymorphic crystals, providing excellent stability during storage. The present invention also relates to a method for preparing the I- and II-type crystals of L-α-glyceryl phosphoryl choline. The I-type crystal of L-α-glyceryl phosphoryl choline is characterized by having an onset temperature of 147° C. and an absorption peak of 150° C. based on differential scanning calorimeter (DSC) analysis, and by having diffraction patterns where 28-diffraction angles are 9.8±0.2°, 12.0±0.2°, 14.3±0.2°, 15.8±0.2°, and 19.6±0.2° based on X-ray diffraction (XRD) analysis. The II-type crystal of L-α-glyceryl phosphoryl choline is characterized by having an onset temperature of 62° C. and an absorption peak of 66° C., and an onset temperature of 141° C. and an absorption peak of 145° C. based on DSC analysis, and having diffraction patterns where 2θ-diffraction angles are 10.3±0.2°, 12.2±0.2°, 13.4±0.2°, 14.8±0.2°, and 20.6±0.2° based on XRD analysis. | 03-05-2015 |
Patent application number | Description | Published |
20110175547 | BACKLIGHT UNIT, DRIVING METHOD THEREOF, AND ERROR DETECTION METHOD THEREOF - A backlight unit includes a driving circuit, a plurality of light source strings, and an error detector. The driving circuit outputs a driving voltage. Each of the light source strings includes a plurality of light sources and receives the driving voltage through input terminals of the light source strings to generate a light. The error detector is connected to output terminals of the light source strings and senses voltages between the input terminals and the output terminals of the light source strings to detect an error in the light sources using a first voltage and a second voltage. The first voltage is a voltage difference between a maximum and a minimum of the sensed voltages and the second voltage is obtained by dividing one sensed voltage of the sensed voltages by a number of the light sources of a light source string from which the one sensed voltage is sensed. | 07-21-2011 |
20110249033 | METHOD OF DRIVING BACKLIGHT ASSEMBLY AND DISPLAY APPARATUS HAVING THE SAME - A backlight assembly outputs scan signals having a scanning frequency synchronized with a frame frequency to sequentially drive light emitting blocks providing a light to a display panel. A dimming step of each light emitting block corresponds to one of a plurality of dimming steps in response to local dimming data. A dimming clock having a value obtained by dividing a value obtained by multiplying the scanning frequency and the number is dimming steps by a duty ratio of each scan signal is generated. The dimming step of each light emitting block is counted using the dimming clock, and the counted values are combined with the scan signals to generate dimming signals having a dimming duty ratio corresponding to the dimming step of the light emitting blocks. | 10-13-2011 |
20110279485 | DISPLAY APPARATUS - A display apparatus includes a backlight unit which emits a light, and a display panel which receives the light to display an image. The backlight unit includes a driving circuit which outputs a driving voltage and a reference voltage; and p light source blocks connected to the driving circuit, p being a natural number greater than or equal to 2, where each light source block of the p light source blocks receives the driving voltage through a first terminal thereof and the reference voltage through a second terminal thereof to generate the light, and the p light source blocks are divided into a plurality of groups, each group including at least two light source blocks. The driving circuit includes a first switching section which applies the driving voltage to first terminals of the p light source blocks, and a second switching section which applies the reference voltage to the second terminal of at least one of the p light source blocks. | 11-17-2011 |
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 |
Patent application number | Description | Published |
20090153068 | BACKLIGHT ASSEMBLY, DISPLAY APPARATUS HAVING THE BACKLIGHT ASSEMBLY, AND METHOD THEREOF - A backlight assembly includes a light-generating unit and an inverter. The light-generating unit includes a first U-shaped lamp and a second U-shaped lamp parallel with each other. Electrodes of the first and second U-shaped lamps are disposed at one side of the light-generating unit. The inverter includes a multi-output transformer, a first output terminal and a second output terminal. The multi-output transformer generates a first driving voltage and a second driving voltage having a phase opposite to a phase of the first driving voltage. The first and second output terminals electrically connect the first and second U-shaped lamps with the multi-output transformer. The multi-output transformer applies the first and second driving voltages to the first and second U-shaped lamps via the first and second output terminals. | 06-18-2009 |
20110101874 | METHOD OF DRIVING LIGHT SOURCE AND DISPLAY APPARATUS FOR PERFORMING THE METHOD - A method of driving a light source apparatus includes inverting a direct current voltage to generate a first alternating current voltage, transforming the first alternating current voltage into a second alternating current voltage having a voltage level that is greater than a voltage level of the first alternating current voltage, compensating a driving alternating current voltage based on the second alternating current voltage to generate a compensated driving alternating current voltage such that a substantially equal current flows through each light emitting string of a plurality of light emitting string included in the light source apparatus, and rectifying the compensated driving alternating current voltage to apply a driving voltage to the light emitting strings. | 05-05-2011 |
20120038691 | METHOD OF DRIVING A LIGHT SOURCE AND DISPLAY APPARATUS FOR PERFORMING THE METHOD - A method of driving a light source, which comprises a first light-emitting module including first to k-th light source blocks and disposed at a first edge of a light guide plate, and a second light-emitting module including first to m-th light source blocks and disposed at a second edge of the light guide plate, wherein k and m are natural numbers, includes generating a plurality of duty control signals corresponding to the first to k-th top light source blocks and the first to m-th bottom light source blocks based on an image signal, and selectively generating first to k-th top driving signals and first to m-th bottom driving signals using the plurality of duty control signals based on a three-dimensional image enable signal, where the first to k-th top driving signals drive the first light-emitting module, and the first to m-th bottom driving signals drive the second light-emitting module | 02-16-2012 |
20120146543 | CONNECTOR FOR LIGHT SOURCE MODULE AND BACKLIGHT ASSEMBLY HAVING THE SAME - A connector for a light source module includes a body portion and a terminal portion. The body portion includes a first opening portion and a second opening portion. The first opening portion receives a portion of the light source module. The second opening portion receives a portion of a light source driver which drives the light source module. The terminal portion includes a first terminal and a second terminal. The first terminal is in the first opening portion of the body portion. The second terminal is connected to the first terminal. The second terminal is in the second opening portion of the body portion. | 06-14-2012 |
20120206057 | METHOD OF DRIVING LIGHT SOURCE, LIGHT SOURCE MODULE FOR PERFORMING THE METHOD AND DISPLAY APPARATUS HAVING THE LIGHT SOURCE MODULE - A method of driving a light source includes receiving an alternating current (“AC”) voltage from outside, generating a first direct current (“DC”) voltage based on the AC voltage, generating a second DC voltage, corresponding to a difference between a driving voltage of a light source part and the first DC voltage, based on the first DC voltage, and outputting a sum of the first DC voltage and the second DC voltage to the light source part | 08-16-2012 |
20120256561 | DC-DC CONVERTER AND DRIVING DEVICE OF LIGHT SOURCE FOR DISPLAY DEVICE USING THE SAME - A DC-DC converter includes a plurality of boost circuits and a controller. The boost circuits are coupled to another in parallel. The boost circuits receive a DC voltage and boost the DC voltage. The controller drives the boost circuits with a duty ratio of less than 50% and different phases. | 10-11-2012 |
20120256894 | BACK LIGHT UNIT AND DISPLAY DEVICE INCLUDING THE SAME - A backlight unit includes a DC-DC converter; a voltage control unit which controls output voltage of the DC-DC converter; a plurality of unit light emitting diode arrays; and current deviation compensating unit in connection with input terminals of the plurality of unit light emitting diode arrays. The current deviation compensating unit receives the controlled voltage of the voltage control unit and transfers a feedback signal to the voltage control unit based on the received voltage, and actively compensates a current deviation generated by electrical characteristics of the plurality of unit light emitting diode arrays and transfers the compensated current deviation to the input terminals of the plurality of unit light emitting diode arrays. | 10-11-2012 |
20130113841 | BACKLIGHT UNIT AND DISPLAY DEVICE INCLUDING THE SAME - A backlight unit includes: a light source unit including at least one light emitting diode (“LED”) string; a driving current controller which is connected to a cathode terminal of the at least one LED string and controls a driving current which flows through the at least one LED string; a feedback unit which generates a feedback signal based on a dimming input signal and a voltage of the cathode terminal of the at least one LED string; and a direct current to direct current (“DC-DC”) converter which generates a driving voltage in response to the feedback signal and provides the driving voltage to the light source unit. | 05-09-2013 |