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 thin film transistor array panel is provided. The array panel includes a storage capacitance that is substantially uniform, and allows for a relatively large capacitance in a relatively small area.

Abstract: A displaying apparatus includes a first substrate having a first orientation film, a second substrate having a second orientation film corresponding to the first orientation film, oppositely facing the first substrate, and a sealant having at least a part overlapped with circumferential regions of the orientation films, the sealant adhering the first substrate to the second substrate, wherein, in one exemplary embodiment, the circumferential regions of the orientation films overlapped with the sealant are formed with protrusions along planar directions of the substrates, thus providing a displaying apparatus having an excellent adherence between substrates and preventing a display region from being narrowed.

Abstract: A liquid crystal display includes first to third voltage lines disposed along an edge of the panel unit in a ring shape, fourth to sixth voltage lines disposed along an edge of the panel unit in a ring shape and at outer sides of the first to third voltage lines, respectively, a first diode unit including a first diode group connected in series between the second voltage line and the fifth voltage line wherein the first diode group includes a plurality of diodes, and a second diode unit including a second diode group connected in series between the third voltage line and the sixth voltage line wherein the second diode group includes a plurality of diodes. One end of each of the data lines is connected between the first diode group and the other end thereof is connected between the second diode group via the transmission gate.

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”) for eliminating an afterimage includes a power supply, a gate driver and a discharger. The power supply detects the cutting off of external power voltage and supplies a discharge signal. The gate driver simultaneously supplies a gate driving signal to a plurality of gate lines in response to the discharge signal, and the discharger supplies a common voltage to a plurality of data lines in response to the discharge signal.

Abstract: A liquid crystal display includes an insulating substrate, a semiconductor, a gate insulating layer, a gate line, an interlayer insulating layer, a data line, a drain electrode, a passivation layer, and a pixel electrode. The semiconductor is formed on the insulating substrate and includes source, drain, and channel regions. The gate line is formed on the gate insulating layer over the semiconductor, and overlaps the channel region thereof. The data line is formed on the interlayer insulating layer and has a source electrode electrically connected to the source region and a drain electrode electrically connected to the drain region. The passivation layer is formed on the data line and drain electrode. The pixel electrode is formed on the passivation layer, and electrically connected to the drain electrode. The data line overlaps the drain region.

Abstract: A level shifter and a display device having the same are provided. In a level shifter, a first transistor includes a gate electrode receiving a first driving voltage, and a source electrode receiving an input signal through an input terminal. A second transistor includes a drain electrode receiving the first driving voltage, and a source electrode electrically connected to a drain electrode of the first transistor through a first node. A third transistor includes a source electrode receiving a second driving voltage, a drain electrode electrically connected to a gate electrode of the second transistor through a second node, and a gate electrode receiving the input signal. A fourth transistor includes a drain electrode receiving the first driving voltage, a gate electrode electrically connected to the drain electrode of the first transistor through the first node, and a source electrode electrically connected to the drain electrode of the third transistor through the second node.

Abstract: A driving apparatus for a display device and a display device including the same include a plurality of pixels, each comprising a switching element, gate lines and data lines connected to the pixels. The driving apparatus includes: a gate driver which generates a gate signal and applies the gate signal to the gate line; a data driver which generates a data signal and applies the data signal to the data line; a transmission gate connected to each of the data lines; a signal controller which controls the gate driver and the data driver; and a control signal generator which generates a plurality of control signals based on a scanning start signal and a plurality of clock signals and applies the control signals to the gate driver and the transmission gate. As the control signal generator generates a plurality of control signals, the number of test pads can be reduced when a VI test is performed, and furthermore a manufacturing cost can be reduced by reducing the number of pins of a driving chip.

Abstract: A driving device for a display device includes a gray voltage generator generating a plurality of gray voltages, a voltage selector selecting an output voltage from the plurality of gray voltages, a voltage level converter converting a level of the output voltage selected by the voltage selector and applying the output voltage with a converted level to data lines, a first switching unit connecting the voltage level converter to the voltage selector and the data lines, and a second switching unit directly connecting the voltage selector and the data lines. Operating times of the first and second switching units are different. Accordingly, when a data voltage is charged in or discharged from a data line, since a separate discharging transistor or a separate discharging amplifier is not used, power consumption and an area of a data driver are reduced.

Abstract: The present invention relates to a display device and a method of testing a display device. A display device according to an exemplary embodiment of the present invention includes: a gate driver for generating gate signals and applying the gate signals to switching elements; a precharge circuit for applying a predetermined voltage to the pixels to precharge the pixels; and a pad portion including a plurality of inspection pads for applying test signals to the gate driver and the precharge circuit. Accordingly, test signals are applied through pads using the gate driver and the precharge circuit, which makes it possible to check whether the two driving circuits normally operate and to detect defects, such as the disconnection or short-circuit of the signal lines, before a module process. Thus, it is possible to reduce manufacturing time and cost.

Abstract: A liquid crystal display (“LCD”) device includes an LCD panel and a driving module. The LCD panel includes a plurality of pixel parts, each including a transmitting portion and a reflecting portion. The transmitting portion has a first switching element electrically connected to a first gate line, and a first liquid crystal capacitor electrically connected to the first switching element. The reflecting portion has a second switching element electrically connected to a second gate line, and a second liquid crystal capacitor electrically connected to the second switching element. The driving module applies a first common voltage to the first liquid crystal capacitor during turning-on of the first switching element, and applies a second common voltage to the second liquid crystal capacitor during turning-on of the second switching element. Therefore, an image display quality is improved.

Abstract: A thin film transistor substrate having a semiconductor layer including a low concentration region and a source region/drain region adjacent to the low concentration region at both sides of a channel region made of polysilicon; a gate insulating layer and a conductive layer on the substrate the conductive layer patterned to form a gate electrode.

Abstract: A level shifter and a display device having the same are provided. In a level shifter, a first transistor includes a gate electrode receiving a first driving voltage, and a source electrode receiving an input signal through an input terminal. A second transistor includes a drain electrode receiving the first driving voltage, and a source electrode electrically connected to a drain electrode of the first transistor through a first node. A third transistor includes a source electrode receiving a second driving voltage, a drain electrode electrically connected to a gate electrode of the second transistor through a second node, and a gate electrode receiving the input signal. A fourth transistor includes a drain electrode receiving the first driving voltage, a gate electrode electrically connected to the drain electrode of the first transistor through the first node, and a source electrode electrically connected to the drain electrode of the third transistor through the second node.

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 display apparatus is implemented using an SOG or SOP technology that can integrate a plurality of circuit elements on a single substrate. The display apparatus does not include a separate frame memory. Instead of the separate frame memory, the display apparatus uses a predetermined region of a memory provided in a host by allocating it as a frame memory region. Since an image signal transmitted/received between the display apparatus and the host has a coded format, a chip size of the display apparatus and an information processing system with the same is reduced and an amount of transmission data is also reduced.

Abstract: An LCD device includes an LCD panel, a source driving part, an operating part, a mean voltage generating part, and a pre-charging part. The LCD panel includes a switching element and a liquid crystal capacitor. The switching element is formed in a region defined by gate and source lines adjacent to each other. The liquid crystal capacitor is electrically connected to the switching element. The source driving part converts data signals into data voltages of analog type. The operating part determines a mean data signal of the data signals. The mean voltage generating part converts the mean data signal into a mean data voltage of analog type. The pre-charging part selectively applies the data voltages and the mean data voltage to the source lines, thereby improving an image display quality of the LCD device.

Abstract: An LCD display device in which the gate lines are controlled by a gate circuit part that outputs gate signals to the gate lines. A first signal wiring is formed adjacent to the gate circuit part and transmits a starting signal, which initiates an operation of the gate circuit part, to the gate circuit part. A second signal wiring is formed at a side of the first signal wiring and transmits a control signal, which controls an output of the gate circuit part, to the gate circuit part. A first connection wiring is electrically connected between the gate circuit part and the second signal wiring. The first connection wiring is intersected with the first signal wiring. Therefore, a resistance of the wiring is increased to protect the gate circuit from static electricity.