Abstract: In a light sensor test unit, a test circuit is built in a display panel and connected to an output node of a light sensor which senses an intensity of an external light. When external light having a predetermined intensity is provided to the light sensor, the test circuit outputs a driving signal in response to a sensing signal output from the output node. A test pixel part includes pixels selected from a plurality of pixels arranged in the display panel and receives the driving signal from the test circuit to display a gray-scale corresponding to the driving signal. A brightness measurer measures a brightness corresponding to the gray-scale displayed in the test pixel part to compare the measured brightness with a predetermined brightness, thereby testing whether the light sensor built in the display panel is normally operated.

Abstract: There are provided a TFT, a TFT substrate using the TFT, a method of fabricating the TFT substrate, and an LCD. The TFT includes a source region, a drain region, and a gate electrode having an opening. The opening of the gate electrode is to enhance the light sensing ability of the TFT when it is used as a light sensor, since light is incident into a region where the opening is formed. The TFT including the gate having the opening can be used in a substrate of a flat display or an LCD using such a substrate. The above TFT can sense light incident from outside the display to adjust the brightness of the screen according to the external illumination.

Abstract: A driving apparatus for a display device includes a signal controller synthesizing first and second signals, respectively, having first and second signal levels to output a synthesized signal having third to fifth signal levels, a signal extracting unit extracting the first and second control signals from the synthesized signal, a gate driver generating gate signals based on the first control signal, and a data driver generating data signals based on the second control signal.

Abstract: A light source apparatus includes a light source module, a luminance determiner, an illuminance sensor and a light source driver. The light source module provides a display panel with light. The luminance determiner obtains luminance data of first image data including at least white image data that is converted from image data of a red color, a green color and a blue color. The illuminance sensor obtains sensing data based upon an external illuminance. The light source driver drives the light source module based upon the luminance data and the sensing data.

Abstract: A driving device for a display and a display using same, and a driving method of the display are provided. The display includes a display panel on which an image is displayed, and at least one optical sensor (photodetector) to detect the intensity of ambient (external) light incident upon the display panel. An external-brightness detector outputs an external-brightness signal based on the intensity of external (ambient) light and a backlight brightness controller changes the brightness of the image displayed (or backlight) on the display panel according to the external-brightness signal. The driving device may be implemented on an integrated circuit adapted to be connected to external-light photodetectors of type 1 or of type 2.

Abstract: An apparatus for driving a display panel includes a first memory which stores a frame image data, a second memory which stores overshooting information. The apparatus receives an image signal from an external system via a CPU interface process. The second memory stores a difference data between the frame image data and an overshooting data. The overshoot is then calculated from the difference data and the frame image data. The apparatus also includes a two-line memory which stores an image signal of an n-th frame in a line unit and an image signal of an n?1-th frame in another line. The two-line memory compares the consecutive two frame data, so that the apparatus extracts overshooting information from a look up table.

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 analog-to-digital (“A/D”) converter includes; a photocurrent integrator which integrates photocurrent and stores the integrated photocurrent in a feedback capacitor in the form of voltage, and a discharger which attenuates the voltage out from the photocurrent integrator in the form of an exponential function.

Abstract: In a light sensor test unit, a test circuit is built in a display panel and connected to an output node of a light sensor which senses an intensity of an external light. When external light having a predetermined intensity is provided to the light sensor, the test circuit outputs a driving signal in response to a sensing signal output from the output node. A test pixel part includes pixels selected from a plurality of pixels arranged in the display panel and receives the driving signal from the test circuit to display a gray-scale corresponding to the driving signal. A brightness measurer measures a brightness corresponding to the gray-scale displayed in the test pixel part to compare the measured brightness with a predetermined brightness, thereby testing whether the light sensor built in the display panel is normally operated.

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 display device, includes: a touch panel which outputs a predetermined enable signal corresponding to an external pressure; a display panel which includes a light detector responding to external light and generating a predetermined electrical signal representing the position of the light; and a panel driver which forms an image corresponding to the electrical signal on the display panel if the enable signal is input.

Abstract: A liquid crystal display includes a display panel having a data-storing unit including transistors integrated into the display panel. The data-storing transistors of the data-storing unit may be formed in the same film (layer) as the TFT pixel transistors on the display panel. Each of the plurality of transistors of the data-storing unit includes an input electrode connected to one of a first voltage or a second voltage depending upon a bit of stored data, and an output electrode commonly connected to a data output terminal of the data-storing unit. The data-storing unit further includes and a Serial-In, Parallel-Out shift register supplied with a reset and first and second clock signals and connected to the input electrodes of the transistors, respectively.

Abstract: A liquid crystal display device with a display region and a non-display region surrounding the display region, the liquid crystal display device comprising: a first substrate; a second substrate which faces the first substrate; and a liquid crystal layer which is interposed between the first substrate and the second substrate, the first substrate comprising: a first insulating substrate; gate and data lines which are formed on the first insulating substrate and intersecting each other; a pixel thin film transistor formed on the display region and electrically connected to the gate and data lines; a pixel electrode electrically connected to the pixel thin film transistor; a gate driver formed on the non-display region and connected to the gate line to drive the gate line; and a direct current (DC)/DC converter formed on the non-display region and comprises a converter thin film transistor and a capacitance part; the capacitance part includes: a first capacitance part which comprises a first electrode, a first

Abstract: A liquid crystal display (LCD) includes associated pairs of amplifiers used in an output buffer of a data driver to implement dot inversion driving of the LCD. The data driver includes a first amplifier having an output terminal connected to a first data line and outputting a positive polarity voltage, a second amplifier having an output terminal connected to a second data line and outputting a negative polarity voltage, and a switching unit connected between the output terminals of the two amplifiers and the two data lines and operative in response to a switching signal to interchange the amplifier output signals respectively applied to the data lines.

Abstract: A display panel includes gate lines formed on a substrate, storage electrode lines formed on the substrate and being parallel to the gate lines, data lines insulated from the gate lines and crossing the gate lines, a plurality of thin film transistors (TFTs) connected with the gate lines and the data lines, and pixel electrodes having a first sub-electrode connected with a TFT and a second sub-electrode formed at a side opposite the first sub-electrode with respect to a gate line, wherein the TFT and a storage electrode line are disposed between the first and second sub-electrodes.

Abstract: A thin film transistor (TFT) substrate that is capable of providing a wide viewing angle and high contrast ratio without a decrease is aperture ratio is presented. The TFT substrate may be, for example, used with a patterned vertical alignment (PVA) mode LCD. The TFT substrate includes gate lines and data lines extending in non-parallel directions and a pixel electrode formed in a pixel region. The pixel region has two transmission regions separated from each other by a reflection region, and at least one of the gate lines is formed in the reflection region. A storage capacitor may also be formed in the reflection region. This configuration avoids the use of a bridge region between the two transmission regions that is responsible for aperture ratio decrease in the conventional configuration.

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 display apparatus includes a display panel, a driving part, a gate driving part and a gate selecting part. The display panel has source lines and gate lines intersecting the source lines. The driving part converts original data signals received through an interlaced scan method into analog-type data voltages and outputs the data voltages to the source lines. The gate driving part sequentially outputs gate signals. The gate selecting part selectively outputs the gate signals to odd-numbered gate lines and even-numbered gate lines corresponding to the data voltages output to the source lines.

Abstract: A liquid crystal display (LCD) apparatus and method for automatically sensing and compensating a delay time of a gate signal fed to the LCD display panel. The LCD panel includes a signal converter for generating a power clock signal, a delay controller for generating a delay control signal corresponding to the delay value of the gate signal by comparing the power clock signal with a signal derived from the data lines, and a pixel voltage signal generator for supplying a pixel voltage signal to the data lines of the LCD panel in response to the delay control signal.

Abstract: A liquid crystal display having a plurality of pixels and blocks of shift registers that are connected to one another for temporarily storing data signals and from which the data signal outputs are sequentially applied to drive the pixels. Each of the shift registers receives a shift start signal and at least one of first and second clock signals, of which phases are opposite to each other, and a high period of the shift start signal corresponds to two cycles of the respective clock signals so that each pixel is pre-charged from the data signal from previous block of registers before receiving the data signal for the current block thereby preventing a boundary between blocks from being visually recognized.