Abstract: A display device includes a light emitting element, a capacitor, a driving transistor, and first to third switching units. The capacitor is connected between a first node and a second node. The driving transistor has an input terminal connected with a first voltage, an output terminal, and a control terminal connected with the second node, and it outputs a driving current to the light emitting element. The first switching unit selects and connects one of a data voltage and a second voltage to the first node. The second switching unit switches a connection between the second voltage and the second node. The third switching unit selects and connects one of the second node and the light emitting element to the output terminal of the driving transistor.

Abstract: Provided may be a panel structure, a display device including the panel structure, and methods of manufacturing the panel structure and the display device. Via holes for connecting elements of the panel structure may be formed by performing one process. For example, via holes for connecting a transistor and a conductive layer spaced apart from the transistor may be formed by performing only one process.

Abstract: Disclosed are an inverter, a NAND gate, and a NOR gate. The inverter includes: a pull-up unit constituted by a second thin film transistor outputting a first power voltage to an output terminal according to a voltage applied to a gate; a pull-down unit constituted by a fifth thin film transistor outputting a ground voltage to the output terminal according to an input signal applied to a gate; and a pull-up driver applying a second power voltage or the ground voltage to the gate of the second thin film transistor according to the input signal.

Abstract: A driving apparatus for a display device includes a gray voltage generator that generates a plurality of gray voltage sets, each including a plurality of gray voltages having different levels, and a signal converter that includes a first selector for selecting one gray voltage set among the plurality of gray voltage sets on the basis of a first portion of an image signal and a second selector for selecting one or more gray voltages among the plurality of gray voltages belonging to the selected gray voltage set on the basis of a second portion of the image signal to output and select gray voltages with a smaller size digital-analog converter.

Abstract: A display device includes a plurality of data lines, a transmission gate element connected to the data lines, wherein the transmission gate supplies precharge voltages and data voltages to the data lines in response to transmission gate signals, and a plurality of pixels connected to the data lines.

Abstract: In a DC-DC converting circuit, a charge pumping part receives an input voltage, a first clock and a second clock and outputs first and second voltages to first and second nodes, which are boosted by high voltages of the first and second clocks with respect to the input voltage. An output part is connected to the first and second nodes of the charge pumping part, and a level boosting part turns on or turns off the charge pumping part in response to the first and second clocks. The output part outputs the first and second voltages through an output terminal during a high period of the first clock and during a high period of the second clock, respectively. Thus, an output voltage having a voltage level corresponding to two times that of the input voltage may be output from the output terminal while the first and second clocks are provided.

Abstract: Provided may be a panel structure, a display device including the panel structure, and methods of manufacturing the panel structure and the display device. Via holes for connecting elements of the panel structure may be formed by performing one process. For example, via holes for connecting a transistor and a conductive layer spaced apart from the transistor may be formed by performing only one process.

Abstract: A display device includes a plurality of pixels, wherein each pixel includes: a light emitting element; a first capacitor connected between a first node and a second node; a driving transistor having an input terminal, an output terminal, and a control terminal connected to the second node where the driving transistor supplies a driving current to the light emitting element to emit light; a first switching unit supplying a first reference voltage to the driving transistor according to a first scanning signal and connecting the first node to a data voltage or the driving transistor; and a second switching unit supplying a driving voltage to the driving transistor according to a second scanning signal and connecting the first node to the data voltage. Accordingly, variations in threshold voltage of the driving transistor can be compensated for so that it is possible to display a uniform image.

Abstract: An amplifier includes a biasing section, first and second differential amplifying sections and an output section. The biasing section outputs first and second bias currents based on first and second power source voltages. The first differential amplifying section outputs a first amplified voltage based on the first bias current. The second differential amplifying section outputs a second amplified voltage based on the second bias current. The output section outputs the second power source voltage based on the first amplified voltage and the first power source voltage, and outputs the first power source voltage based on the second amplified voltage and the second power source voltage. Therefore, a variation of the threshold voltage is compensated to enhance display quality.

Abstract: A single input level shifter, which performs a stable level-shifting operation without increasing its area when used with a thin film transistor (“TFT”) having a variety of different characteristics, and includes an intermediate voltage signal providing unit for providing an intermediate voltage signal having a voltage between a supply voltage and an input signal voltage, an inverting unit for receiving the intermediate voltage signal and providing an inverted intermediate voltage signal, and a voltage signal comparing unit for comparing the intermediate voltage signal with the inverted intermediate voltage signal and providing the supply voltage or the ground voltage according to the comparison. A TFT liquid crystal display (“LCD”) device employs the single input level shifter.

Abstract: A level shifter includes; a level conversion unit which receives a first input signal and a second input signal, wherein the second input signal is an inversion of the first input signal, and generates a first output signal having substantially a same phase of the first input signal and a voltage which is higher than the first input signal and a second output signal having substantially a same phase as the first input signal and a voltage which is lower than the first input signal; and wherein the level shifter further includes an amplifying unit which receives the first and second output signals and generates a third output signal having substantially a same phase as the first input signal and an amplitude which is greater than the first input signal.

Abstract: An analog buffer, display device having the same and a method of driving the same are provided. The analog buffer applies an analog voltage to a load. The analog buffer includes a comparator and a transistor. The comparator is configured to compare an input voltage provided from an external device with the analog voltage applied to the load. The transistor is turned on to electrically charge the load when the analog voltage is lower than the input voltage or turned on to electrically discharge the load when the analog voltage is higher than the input voltage, and turned off when the analog voltage becomes substantially the same as the input voltage.

Abstract: A level shifter includes: a voltage dividing unit receiving a first voltage and an input voltage, and generating a middle voltage between the first voltage and the input voltage; first and second voltage compensating units connected to the voltage dividing unit and connected between the first voltage and a second voltage, for compensating a voltage variation of the voltage dividing unit; and an output unit receiving an output from the voltage dividing unit and generating an output voltage.

Abstract: A liquid crystal display (LCD) apparatus includes a first substrate, a second substrate, a liquid crystal layer and a backlight assembly. The first substrate includes a display part and a sensor part. The sensor part is disposed in a peripheral area of the display part and senses external light. The second substrate is disposed opposite to the first substrate. The liquid crystal layer is disposed between the first substrate and the second substrate. The backlight assembly is disposed adjacent to the second substrate to expose the first substrate and to provide light. A light detecting function of the sensor part may be increased, so that the backlight may be used effectively and the power consumption of the display apparatus may be reduced.

Abstract: A display device includes a light emitting element, a capacitor, a driving transistor, and first to third switching units. The capacitor is connected between a first node and a second node. The driving transistor has an input terminal connected with a first voltage, an output terminal, and a control terminal connected with the second node, and it outputs a driving current to the light emitting element. The first switching unit selects and connects one of a data voltage and a second voltage to the first node. The second switching unit switches a connection between the second voltage and the second node. The third switching unit selects and connects one of the second node and the light emitting element to the output terminal of the driving transistor.

Abstract: In a DC-DC converting circuit, a charge pumping part receives an input voltage, a first clock and a second clock and outputs first and second voltages to first and second nodes, which are boosted by high voltages of the first and second clocks with respect to the input voltage. An output part is connected to the first and second nodes of the charge pumping part, and a level boosting part turns on or turns off the charge pumping part in response to the first and second clocks. The output part outputs the first and second voltages through an output terminal during a high period of the first clock and during a high period of the second clock, respectively. Thus, an output voltage having a voltage level corresponding to two times that of the input voltage may be output from the output terminal while the first and second clocks are provided.

Abstract: A level shifter includes; a level conversion unit which receives a first input signal and a second input signal, wherein the second input signal is an inversion of the first input signal, and generates a first output signal having substantially a same phase of the first input signal and a voltage which is higher than the first input signal and a second output signal having substantially a same phase as the first input signal and a voltage which is lower than the first input signal; and wherein the level shifter further includes an amplifying unit which receives the first and second output signals and generates a third output signal having substantially a same phase as the first input signal and an amplitude which is greater than the first input signal.

Abstract: A gate-on voltage generation circuit, a gate-off voltage generation circuit, and a liquid crystal display (LCD) using the same are provided. The gate-on voltage generation circuit includes a first capacitor charged with a first control signal and a first reference voltage to output a first charging voltage through a first output node according to the first control signal. A second capacitor is charged with a second control signal and the first reference voltage to output a second charging voltage according to the second control signal. A first switching device is connected between the first capacitor and the first output node to selectively output the first charging voltage to the first output node. A second switching device is turned on by the second charging voltage to supply the first reference voltage to the first capacitor, the first and second switching devices being exclusively turned on and off.

Abstract: A driving apparatus for a display device includes a gray voltage generator that generates a plurality of gray voltage sets, each including a plurality of gray voltages having different levels, and a signal converter that includes a first selector for selecting one gray voltage set among the plurality of gray voltage sets on the basis of a first portion of an image signal and a second selector for selecting one or more gray voltages among the plurality of gray voltages belonging to the selected gray voltage set on the basis of a second portion of the image signal to output and select gray voltages with a smaller size digital-analog converter.

Abstract: Disclosed is a level shifter having an amplifier amplifying a second supply voltage and generating an input voltage higher than the predetermined signal, a input buffer selectively transferring an input signal based on the input voltage of the amplifier and an output transistor providing a first supply voltage to an output terminal based on the input signal of the input buffer. When the transistor of the amplifier is turned on, the voltage difference of between gate and source of the input buffer is increased according to the increase of the input voltage, so that it is possible to operate with high speed. Moreover, when the transistor of the amplifier is turned off, the voltage difference of between gate and source becomes negative so that power consumption may reduce because there is no leakage current.