Abstract: Disclosed is a display device together with a method of modifying image signals. The display device includes a plurality of pixels with first and second pixels, and an image signal modifier for generating a modified image signal by modifying the input image signal of the first pixel based on the previous image signal of the first pixel and the input image signal of the second pixel. Dynamic capacitance compensation is made for a pixel where the gray variation thereof with respect to the pixels neighboring thereto is low, but over-compensation that is greater than the dynamic capacitance compensation is made for a pixel where the gray variation thereof with respect to the pixel neighbors is high, thereby decreasing the blurring, and preventing the image quality from being deteriorated.

Abstract: A thin film transistor array panel is provided, which includes: a substrate; a plurality of first signal lines formed on the substrate; a plurality of second signal lines intersecting the first signal lines to define pixel areas; first and second pixel electrodes disposed substantially in a pixel area and having different areas; a plurality of thin film transistors connected to the first and the second signal lines and at least one of the first and the second pixel electrodes; a coupling electrode overlapping the second pixel electrode; and a tilt direction defining member for determining tilt directions of liquid crystal molecules formed on the substrate.

Abstract: The present invention provides a thin film transistor (“TFT”) array panel including a substrate, first and second transmissive electrodes formed on the substrate, first and second reflective electrodes connected to the first and second transmissive electrodes, respectively, and third and fourth reflective electrodes separated from the first and second transmissive electrodes and the first and second reflective electrodes. A first area ratio of the first and third reflective electrodes is different from a second area ratio of the second and fourth reflective electrodes. A liquid crystal display (“LCD”) includes the TFT array panel, and a method is provided for coinciding voltage-reflection curves of adjacent pixels in the LCD.

Abstract: A thin film transistor array panel is provided, which includes: an insulating substrate (110); a plurality of control lines (121) provided on the substrate and including first and second control lines; a plurality of data lines (171) provided on the substrate and including first and second data lines; a pixel electrode (190) provided on the substrate and having a cutout (191); a field control electrode (178) provided on the substrate and overlapping the cutout; a first switching element for applying a first signal from the first data line to the pixel electrode in response to a first control signal from the first control line; and a second switching element (2) for controlling a second signal to be applied to the field control electrode (178).

Abstract: A display device includes a plurality of pixels arranged in a matrix, a signal controller that is configured to convert an input image signal having a first frequency into a plurality of output image signals having a second frequency and provide the plurality of output image signals at an output, a gray voltage generating unit for generating a plurality of gray voltage sets corresponding to the plurality of output image signals, respectively, and a data driver for selecting data signals corresponding to the plurality of output image signals from one of the plurality of gray voltage sets and applying the data signals to the pixel.

Abstract: A phase-invariant layer, which is formed at areas that are not transmission areas, forces light entering the reflection areas of a transflective LCD from a backlight unit to move into transmission areas by reflection, so that the amount of light used in a transmission mode is increased. In this way, light utilization efficiency and display luminance of the LCD are improved.

Abstract: The present invention provides an LCD and method of manufacture of a TFT array panel of an LCD that efficiently utilizes all light emitted from a backlight unit to display images without light loss. In an exemplary embodiment, an LCD having a transmission area and a reflection area includes a first substrate, a reflection element formed on the first substrate corresponding to the reflection area, a TFT formed on the first substrate, a pixel electrode having a transparent electrode formed on the TFT and a reflective electrode that overlies the transparent electrode and is formed at the reflection area, a second substrate, an optical retardation layer formed on the second substrate causes a phase difference between light passing through the transmission area and the reflection area, and a common electrode formed on the optical retardation layer.

Abstract: A gray scale voltage generator and a method of generating a gray scale voltage in a transmissive and reflective type liquid crystal display device are disclosed. A transmissive mode gray scale data are transformed into real reflective mode gray scale data. An integer part is extracted from the real reflective mode gray scale data as a first reflective mode gray scale data. The first reflective mode gray scale data and temporary reflective mode gray scale data are mixed in a predetermined ratio by N-frame period. The temporary reflective mode gray scale data has a sum of one and the first reflective mode gray scale data. Pseudo gray scale data are inserted into the second reflective mode gray scale data. Therefore, superior display quality is provided in both transmissive and reflective mode.

Abstract: A transflective liquid crystal display (LCD) is disclosed where the liquid crystal layer includes a transmission area and a reflective area. The ratio of the liquid crystal molecules to polymers in the reflection area is lower than in the transmission area through independent exposure of the two areas to light to polymerize monomers contained in the original liquid crystal layer mixture. Because of the varied ratios in the two areas of the liquid crystal layer, the two areas also possess different phase retardation values while possessing the same cell gap, and display an improved image over conventional transflective liquid crystal displays.

Abstract: A transreflective LCD includes a plurality of pixels arranged in a matrix, each including a switching element, a backlight for supplying light to the pixels, and first, second, third, and fourth capacitors which are individually connected to output terminals of the switching elements. Each pixel includes a transmissive area for transmitting light from the backlight, and a first reflective area and a second reflective area for reflecting light originating from the exterior environment. In this way, the reflective area is divided into two areas and the auxiliary capacitor is provided in one area of the two. The gamma curves of the transmissive mode and the reflective mode can meet together at a curve by controlling the dimension ratio and the voltage ratio of the two areas. In this way, color display showing uniform color sense can be realized without regard to changes in mode.

Abstract: An LCD includes a plurality of gate lines, a plurality of data lines intersected with the gate lines, a plurality of switching elements connected with the gate lines and the date lines, an insulating layer formed on the switching element, a transflective layer formed on the insulating layer and including a plurality of light-reflecting elements for reflecting light and a lens layer for refracting incident light from the exterior toward the light-reflecting elements, and a plurality of pixel electrodes formed on the transflective layer and connected with the switching elements. The transflective layer 186 including the lens layer with protrusions and the light-reflecting elements enables an entire aperture area of all pixels to be used, thereby maximizing transmittance without any loss of reflectance.

Abstract: A driving apparatus driving method of a flat panel (e.g., LCD) display device. The driving apparatus of the display device includes: a data processor that selects a (at least) two of output gray levels (output image data ) based on an input gray level (of received image data) and outputs the two output grays for each pixel to a data driver that selects two gray (reference) voltages corresponding to the output image data output from the data processor and applies the gray (reference) voltages to the pixels as data voltages. The first output gray level may be less than the second output gray level, and less than the input gray level. The first and second output gray level (and thus the first and second output grays) applied to the pixel as data voltages are optically averaged at the pixel, to have the same (average) transmittance as the original input gray level. A gray voltage generator generates and outputs a plurality of gray (reference) voltages for selection by the data driver.

Abstract: A thin film transistor array panel is provided, which includes: an insulating substrate (110); a plurality of control lines (121) provided on the substrate and including first and second control lines; a plurality of data lines (171) provided on the substrate and including first and second data lines; a pixel electrode (190) provided on the substrate and having a cutout (191); a field control electrode (178) provided on the substrate and overlapping the cutout; a first switching element for applying a first signal from the first data line to the pixel electrode in response to a first control signal from the first control line; and a second switching element (2) for controlling a second signal to be applied to the field control electrode (178).

Abstract: A method of improving the viewing angle of a vertically-aligned liquid crystal display device is presented. The method involves designing a uniaxial compensation film to provide a retardation value of 200 nm or less for light having a wavelength of about 550 nm. Using this uniaxial compensation film, a display device can be built by obtaining a liquid crystal panel with liquid crystal molecules contained between glass substrates, coupling the uniaxial compensation film to at least one of the glass substrates, and coupling a polarization film and electrodes to the compensation film. Preferably, the uniaxial compensation film has a thickness less than or equal to 50 microns. Where there are multiple compensation films, the total thickness and the total retardation values should be considered.

Abstract: A method of improving the viewing angle of a vertically-aligned liquid crystal display device is presented. The method involves designing a uniaxial compensation film to provide a retardation value of 200 nm or less for light having a wavelength of about 550 nm. Using this uniaxial compensation film, a display device can be built by obtaining a liquid crystal panel with liquid crystal molecules contained between glass substrates, coupling the uniaxial compensation film to at least one of the glass substrates, and coupling a polarization film and electrodes to the compensation film. Preferably, the uniaxial compensation film has a thickness less than or equal to 50 microns. Where there are multiple compensation films, the total thickness and the total retardation values should be considered.

Abstract: A thin film transistor array panel is provided, which includes: an insulating substrate; a plurality of first signal lines formed on the insulating substrate; a plurality of second signal lines formed on the insulating substrate and intersecting the first wire in an insulating manner; a pixel electrode formed in a pixel area defined by the intersections of the first signal lines and the second signal lines and including a plurality of subareas partitioned by cutouts and a plurality of bridges connecting the subareas; and a direction control electrode formed in the pixel area and including a portion overlapping at least one of the cutouts, wherein two long edges of each subarea are parallel to each other and the at least one of cutouts overlapping the portion of the direction control electrode defines one of two longest edges of the subarea.

Abstract: A thin film transistor array panel is provided, which includes an insulating substrate, a gate line formed on the insulating substrate, a gate insulating layer covering the gate line, a data line formed on the gate insulating layer, a lower passivation layer covering the data line, an upper passivation layer formed on the lower passivation layer and made of organic insulating material, and a pixel electrode formed on the upper passivation layer. The thicknesses of the gate insulating layer, the lower passivation layer, and the pixel electrode are respectively represented as dG, dP, and dI, the refraction indexes of the gate insulating layer, the passivation layer, and the pixel electrode are respectively represented as nG, nP, and nI, and condition equations are satisfied according to: 4(dGnG+dPnP)=, which is an even multiple of the wavelength; and 4dInI=, which is an even multiple of the wavelength.

Abstract: The present invention provides a TFT array panel having a transmissive region and a reflective region. A transmissive electrode is disposed in the transmissive region. The first reflective electrode connected to the transmissive electrode is disposed on the reflective region. The second reflective electrode separated from the transmissive electrode and the first reflective region is formed in the reflective region. A first conductor is connected to at least one of the transmissive electrode and the first reflective electrode. A second conductor is connected to the second reflective electrode. At least one of the transmissive electrode, the first reflective electrode and the first conductor overlaps at least one of the second reflective electrode and the second conductor.

Abstract: In an array substrate, a display apparatus having the same and a method for repairing the same, a substrate includes a display area and a peripheral area that is adjacent to the display area. A plurality of signal transmitting lines are formed in the peripheral area of the substrate. A plurality of signal lines are formed in the display area of the substrate and connected to the signal transmitting lines. A repair part is formed in the peripheral area of the substrate. The repair part intersects and is insulated from the signal transmitting lines so as to repair a first opened signal transmitting line of the signal transmitting lines. Thus, the array substrate may be produced in high-yield and prevent signal distortion.

Abstract: The present invention is directed to an apparatus of driving a liquid crystal display device including a plurality of pixels. The driving apparatus includes a gray voltage generator for generating a plurality of gray voltages, an image signal driver for selecting gray voltages corresponding to color signals and applying the selected gray voltages as image signal voltages to the pixels, and a signal controller for controlling the image signal driver based on the color signals and input control signals for controlling the color signals. At least two successive first gray voltages among the plurality of gray voltages are variable arid at least two successive second gray voltages among the plurality of gray voltages are fixed.