Abstract: The present invention relates to the field of display technology, and provides a circuit and a method for eliminating a shutdown after-image, and a display device. The circuit for eliminating the shutdown after-image in a liquid crystal panel comprises a control module configured to apply a common voltage of a liquid crystal panel to a gate line of the liquid crystal panel under the control of a shutdown signal when the liquid crystal panel is shut down. According to the present invention, it is able to eliminate the shutdown after-image and prevent the occurrence of large shutdown current.

Abstract: In the liquid crystal display device, image signals are concurrently supplied to pixels provided in a plurality of rows among pixels arranged in matrix in a pixel portion where input of image signals is controlled by transistors including polycrystalline semiconductors or single crystal semiconductors in channel formation regions. Thus, the image quality of the liquid crystal display device can be improved.

Abstract: A common electrode driving method, comprises: generating a first common electrode signal to be applied to a storage electrode line of each row of pixels on an array substrate, and a second common electrode signal to be applied to a common electrode forming a liquid crystal capacitance with pixel electrodes of each row of pixels on the array substrate, the first common electrode signal being opposite to a gate signal for gate electrodes applied to the corresponding row of pixels in terms of transition timing; and inputting the first common electrode signal to each row of pixels, and inputting the second common electrode signal to the common electrode.

Abstract: A display, including a substrate having a display area including first and second non-overlapping pixel groups and a gutter located between the first and second pixel groups, the gutter having a dimension in a first direction separating the first and second pixel groups, and each pixel group includes a plurality of pixels, each pixel having three or more differently colored sub-pixels; and wherein the pixel centers of the pixels in each pixel group are arranged in a regular two-dimensional array having one dimension parallel to the first direction, and wherein the pixels within a pixel group are separated by an inter-pixel separation in the first direction; and one or more electrical elements arranged within the gutter, each subpixel being connected to one of the one or more electrical elements, wherein the gutter dimension is greater than the inter-pixel separation, so that artifacts in a displayed image are reduced.

Abstract: A LCD panel in which a pixel has a first sub-pixel area and a second sub-pixel area, each area having a storage capacitor. Each pixel has a first gate line for providing a first gate-line signal for charging the first and second storage capacitors, and a second gate line for providing a second gate-line signal for removing part of the charges in the second storage capacitor to a third capacitor after the first gate-line signal has passed. The width of the first and second gate-line signals and their timing can be varied so that the first gate-line signal provided to a row can be used as the second gate-line signal to one of the preceding rows. In some embodiments, a pixel in each row has a duplicate pixel arranged to similarly receive the first and second gate-line signals, but data signals are received from different data lines.

Abstract: In a shift register circuit, a defective operation while an output signal is not outputted and a drive capability lowering while the output signal is outputted are prevented. A unit shift register comprises a first transistor for supplying a clock signal inputted to a first clock terminal to an output terminal, and the first transistor is driven by a drive circuit. A second transistor is connected between the gate of the first transistor and the output terminal and has a gate connected to the first clock terminal. The second transistor connects the gate of the first transistor to the output terminal based on the clock signal when the gate of the first transistor is at L (Low) level.

Abstract: A built-in self-test (BIST) circuit for a liquid crystal display (LCD) source driver includes at least one digital-to-analog converter (DAC) and at least one buffer coupled to the respective DAC, wherein the buffer is reconfigurable as a comparator. A first input signal and a second input signal are coupled to the comparator. The first input signal is a predetermined reference voltage level. The second input signal is a test offset voltage in a test range.

Abstract: In a display apparatus having a plurality of pixel parts, each pixel part receives a data signal in response to a present gate signal and charges first and second pixel voltages having the same voltage level. A plurality of voltage controllers includes a level-down part to lower a voltage level of the second pixel voltage using a previous pixel voltage charged in a previous frame in response to a next gate signal and a level-up part to receive the lowered second pixel voltage in response to the next gate signal to boost up a voltage level of the first pixel voltage.

Abstract: A method of driving a display panel includes applying a common voltage to the display panel, sensing a frequency of the display panel to generate a frequency signal, adjusting a gain of an operational amplifier based on the frequency signal, receiving a feedback common voltage from the display panel, and compensating the common voltage using an input resistor, the operational amplifier and a feedback resistor based on the feedback common voltage to apply the compensated common voltage to the display panel. The operational amplifier includes an inverting input terminal connected to the input resistor, a non-inverting input terminal to which a reference common voltage is applied and an output terminal. The feedback resistor is between the inverting input terminal and the output terminal.

Abstract: A liquid crystal display and a driving method thereof are provided. The liquid crystal display includes a plurality of pixels, a plurality of scan lines, and a plurality of data lines. Each pixel includes a plurality of sub-pixels. Each sub-pixel is coupled to the data line, and includes a switch, a storage capacitor, and a sub-pixel electrode. The switch is coupled to a scan line to receive a scan signal. The switch is turned on by the scan signal to receive a data signal transmitted from the data line. The storage capacitors of the sub-pixels of each pixel are coupled to the scan lines, or the storage capacitor of one of the sub-pixels of each pixel is coupled to a common electrode and the storage capacitors of the other sub-pixels are coupled to the scan lines. The switch and the storage capacitor of each sub-pixel are coupled to different scan lines.

Abstract: Provided is a display device using electrowetting including a reservoir layer in which a reservoir for storing oil and transparent water-soluble liquid is formed. A first electrode and a second electrode may be formed on an upper surface of the reservoir layer and on an inner wall of the reservoir, respectively.

Abstract: Disclosed is a thin film transistor that is provided with a gate insulating film that is inexpensive, and that is less likely to have a low-density microcrystalline silicon layer formed thereon due to plasma induced damage, while suppressing fluctuation of a threshold voltage. In a TFT (100) having the bottom gate structure, since a silicon nitride film (31) having a natural oxide film (32) formed on the surface thereof is used as the gate insulating film (30), the gate insulating film (30) is not only capable of preventing the alkali metal ions contained in a glass substrate (10) from entering the gate insulating film (30), but also capable of suppressing a formation of the low-density microcrystalline silicon layer on the surface of a microcrystalline silicon film (41) on the side in contact with the gate insulating film (30). Since the mobility of the microcrystalline silicon film (41) is increased, the operation speed of the TFT (100) can be improved.

Abstract: A scan driving device includes: a first node transmitted with a clock signal input to a first clock signal input terminal; a second node transmitted with an input signal according to a clock signal input to a second clock signal input terminal; a first transistor transmitting a power source voltage to an output terminal according to a voltage of the first node; a second transistor formed to transmit the clock signal input to the third clock signal input terminal to the output terminal according to the voltage of the second node; and a dummy transistor formed to transmit the clock signal input to the third clock signal input terminal to the output terminal according to the voltage of the second node. One of the second transistor and the dummy transistor is cut off.

Abstract: Each picture element includes first and second sub-picture elements, each of which includes a liquid crystal capacitor and at least one storage capacitor. After a display voltage representing a certain grayscale level has been applied to the respective sub-picture element electrodes of the first and second sub-picture elements, a voltage difference ?V? is produced between voltages to be applied to the respective liquid crystal capacitors of the first and second sub-picture elements by way of their associated storage capacitor(s). By setting the voltage difference ?V? value of the blue and/or cyan picture element(s) to be smaller than that of the other color picture elements, shift toward the yellow range at an oblique viewing angle can be minimized.

Abstract: A liquid crystal display (LCD) device is provided. The LCD device comprises a data signal line in a first plane and a common electrode line in a second plane, and the common electrode line comprises an intersection region, which is a region where a projection of the common electrode line in the first plane overlaps with a region of the data signal line. The intersection region comprises a plurality of narrow common electrode lines.

Abstract: A display device includes a display panel having a plurality of pixels arranged in a matrix, a printed circuit board connected to the display panel, and a first drive circuit and a second drive circuit mounted on the display panel or the printed circuit board, in which each of the first drive circuit and the second drive circuit includes a gray scale voltage generating circuit generating a gray scale voltage to be applied to a first electrode of the pixel based on a gray scale reference voltage and a reference gray scale voltage circuit generating the gray scale reference voltage, and each of the gray scale voltage generating circuit of the first drive circuit and the gray scale voltage generating circuit of the second drive circuit generates the gray scale voltage based on the gray scale reference voltage generated in the reference gray scale voltage circuit of the first drive circuit.

Abstract: A display electrode structure and the repairing method thereof are described. The display electrode structure includes a display electrode and at least one opening formed on the display electrode and extending toward the inside of the display electrode so as to easily repair a display electrode defect thereon. The display electrode repairing method uses a laser beam to cut a display electrode from the opening and along the metal line to separate the display electrode from an adjacent display electrode so as to remove a short circuit between the display electrode and the adjacent display electrode.

Abstract: An active matrix display device comprises a substrate having an insulating surface, a plurality of pixel electrodes arranged in a matrix form over the substrate, and a plurality of switching elements operationally connected to the pixel electrodes. Each of the switching elements further comprise a thin film transistor. The display device further includes a display medium comprising an emissive material that is capable of electrically changing luminous strength disposed at each of the pixel electrodes, and a driver circuit that includes a plurality of thin film transistors for driving the plurality of switching elements. Each of the plurality of thin film transistors comprise a crystallized semiconductor layer, a gate insulating film adjacent to the crystallized semiconductor layer and a gate electrode adjacent to the gate insulating film.

Abstract: A gate driver and a method for repairing the same are disclosed. The gate driver includes a shift register including a plurality of stages each having a respective one of a plurality of first output lines; at least one repair line connectable to the first output lines; a storage device to store information therein to identify a position of a certain stage of the plurality of stages; and a repair scan pulse generator to provide repair scan pulses to the repair line based on information stored in the storage device.

Abstract: A segmented-pixel liquid crystal display has a plurality of pixels of which each has three sub-pixels 10a-10c, namely one middle and two side sub-pixels, arranged next to one another in the column or row direction. The sub-pixels 10a-10c have different brightness levels when the pixel as a whole is in a given middle halftone state, and the middle sub-pixel 10a has the highest brightness level. This eliminates unnaturalness as is conventionally produced when an image with a straight border is displayed, and further improves the gamma characteristic.

Abstract: A driving circuit of at least one embodiment includes: m output terminals; m+1 video signal output sections including m+1 output circuits, respectively; a decision section for determining the quality of each of the video signal output sections; and switches for switching connections between the output terminals and the video signal output sections in accordance with a result of determination made by the decision section. When the decision section has determined the ith (i being a natural number of m or less) video signal output section to be defective, the switches connect the jth (j being a natural number of i?1 or less) video signal output section to the jth output terminal and connect the (k+1)th (k being a natural number of i or more to m or less) video signal output section to the kth output terminal. Thus provided is a driving circuit, capable of self-repairing a defective one of the video signal output sections, which has more simplified wires connected to the video signal output sections.

Abstract: A display device is provided, which includes, a substrate, a plurality of gate lines formed on the substrate, a gate driver disposed on the substrate and transmitting gate signals to the gate lines, a repair gate driver disposed on the substrate and having a structure substantially the same as that of the gate driver, and a signal line coupled to the gate driver and the repair gate driver and transmitting at least one control signal to the gate driver.

Abstract: A liquid crystal display includes a plurality of data lines and a plurality of pixels arranged in a matrix, wherein the plurality of pixels include a first pixel and a second pixel, and each of the first pixel and the second pixel includes a first subpixel electrode and a second subpixel electrode, a first switching element, a second switching element, a third switching element, and a voltage-changing capacitor, wherein a first source electrode on the first switching element and a second source electrode on the second switching element from the first pixel are connected to a data line, the first source electrode and the second source electrode of the second pixel are disconnected from the plurality of data lines, and the two terminals of the voltage-changing capacitor of the second pixel are shorted to each other.

Abstract: There is disclosed an electrooptical device capable of achieving a large area display by making full use of the size of the substrate. An active matrix substrate acts as a driver portion for the reflection-type electrooptical device. A pixel matrix circuit and logic circuitry are formed on the active matrix substrate. At this time, the logic circuitry is disposed, by making use of a dead space in the pixel matrix circuit. The area occupied by the pixel matrix circuit, or image display region, can be enlarged without being limited by the area occupied by the logic circuitry.

Abstract: The present invention discloses a rescue circuit of display panel and a rescue method thereof. The rescue circuit includes an amplifier, a first conductive line, a second conductive line, and a third conductive line. The amplifier has an input end and an output end. The first conductive line and the second conductive line intersect and are isolated from signal input terminals of the plurality of signal lines. The first conductive line is electrically connected to the input end and the second conductive line is electrically connected through an electrical resistor to the output end. The third conductive line intersects and is isolated from signal distal ends of the signal lines and is electrically connected to the output end. The rescue method includes performing a welding operation and performing a cutting operation. With such a rescue, a broken signal line may effectively overcome the problem of weak line with the electrical resistor connected to the second conductive line.

Abstract: Elements of the present invention relate to systems and methods for generating, modifying and applying backlight array driving values.

Abstract: The present invention directs to a method for automatically compensating a common electrode voltage, comprising: calculating an average shift amount of a common electrode voltage according to gray scale data in a line on a displayed image, processing the average shift amount of the common electrode voltage to be a digital signal then converting it into an analog signal then into an average shift amount voltage waveform, and superposing it with a common electrode voltage waveform to form a new output signal waveform for driving the common electrode; the present invention also directs to a device for automatically compensating a common electrode voltage, comprising a data input module, a looking up module, a data operation module, a data encoding and converting module, a waveform generator and an operational amplification module.

Abstract: A display panel including a plurality of scan lines, a plurality of data lines, and a plurality of pixels is provided. The data lines are disposed substantially perpendicular to the scan lines Each of the pixels is electrically connected with the corresponding data line and the corresponding scan line and the pixels are arranged as an array. The data lines are grouped into a plurality of groups and each of the groups is disposed between two adjacent pixel columns and has N data lines, where N is a positive integer greater than or equal to 3. A portion of the data lines of at least a first group among the groups cross over a portion of the scan lines. The rest data lines of the first group cross over all the scan lines.

Abstract: An LCD panel transmits the display data to sub-pixels in a zigzag pattern through a data line. The variation of the feed-through voltages of the sub-pixels may be modified by adjusting the ratios of the channel widths and the channel lengths of the TFTs in the sub-pixels to some predetermined ratios, or by adjusting the compensation capacitance to the coupling capacitance of the TFTs of the sub-pixels.

Abstract: A display device, including a substrate; an array of pixels arranged in rows and columns forming a light-emitting area over the substrate, each pixel including a first electrode, one or more layers of light-emitting material located over the first electrode, and a second electrode located over the one or more layers of light-emitting material; a first serial buss having a plurality of electrical conductors, each electrical conductor connecting one chiplet in a first set of chiplets to only one other chiplet in the first set in a serial connection, the chiplets being distributed over the substrate in the light-emitting area, each chiplet including one or more store-and-forward circuits for storing and transferring data connected to its corresponding electrical conductor; and a driver circuit in each chiplet for driving at least one pixel in response to data stored in the store-and-forward circuit.

Abstract: The present invention aims to reduce flickers of the liquid crystal display device and enable the use of liquid crystal material exhibiting a high response speed, and to enhance light usage efficiency of the field sequential type liquid crystal display device. After writing the video signal to all the pixels in each sub-frame period, a correction voltage signal or an alternating signal having a frequency of greater than or equal to a certain frequency is input to the data line, so that the magnitude of the leakage current of each pixel TFT caused by the difference in polarity of the video signal with respect to the opposing electrode written to the pixel electrode is equalized, and the flickers are greatly reduced.

Abstract: A method for driving a liquid crystal display (LCD) apparatus, wherein the LCD apparatus comprises a plurality of scan rows, a plurality of data columns, and a data driving circuit, includes: driving a plurality of specific scan rows of the plurality of scan rows at a same time; extracting a plurality of pixel data, arranged into a first order, corresponding to the plurality of specific scan rows; arranging the plurality of pixel data into a second order different from the first order according to a connecting relationship between the data driving circuit and a plurality of pixels of the plurality of specific scan rows; and utilizing the data driving circuit to drive a plurality of pixels according to the plurality of pixel data corresponding to the second order.

Abstract: The display device is provided with X electrodes XP and Y electrodes YP which cross with a first insulating layer in between and a number of Z electrodes which are electrically floating from each other with a second insulating layer in between. The Z electrodes are arranged so that each Z electrode overlaps both an adjacent X electrode and Y electrode. The pad portion of a first X electrode has such a form that the area is maximum in the vicinity of the fine wire portion of the first X electrode and the area is minimum in the vicinity of the fine wire portion of an adjacent second X electrode, and the area of the pad portion is smaller towards the direction in which the distance increases away from the vicinity of the fine wire portion of the first X electrode. A pulse signal is sequentially applied to one set of X electrodes or Y electrodes.

Abstract: A liquid crystal display device is configured to improve display quality by minimizing flickers and residual images through inversion. The inversion may include changing the polarity of the data voltages. A first liquid crystal cell may be charged with a potential difference between a first data voltage supplied to a first pixel electrode and a second data voltage supplied to an adjacent second pixel.

Abstract: A liquid crystal display and a method of driving the same are disclosed. The liquid crystal display includes a liquid crystal display panel including data lines and gate lines crossing each other and liquid crystal cells, a timing control signal generating unit, a data drive circuit supplying a data voltage to the data lines, and a gate drive circuit. The timing control signal generating unit generates a first gate timing control signal for controlling a scan direction of the liquid crystal display panel in a sequential direction and a second gate timing control signal for controlling the scan direction in a reverse sequential direction. The gate drive circuit supplies a gate pulse to the gate lines while a shift direction of the gate pulse changes in response to the first and second gate timing control signals.

Abstract: A drive control circuit includes a timing controller for detecting a change of a horizontal scanning frequency, a gate voltage generating circuit for generating two kinds of gate-on voltages Va and Vb (Va<Vb), and a switch for outputting one of the gate-on voltages Va and Vb from the gate voltage generating circuit in accordance with an output of the timing controller. The timing controller includes a counter for counting the number of clocks for one horizontal period, and a comparator for comparing a count result with a threshold value. When the horizontal scanning frequency is in a normal state, the low gate-on voltage Va is outputted, and when the horizontal scanning frequency exceeds a predetermined threshold value, that is, the count value falls below a threshold value, the high gate-on voltage Vb is outputted.

Abstract: A liquid crystal display device includes: scanning wires, provided so as to correspond to a plurality of pixels disposed in a matrix manner, to which scanning signals are applied; and signal wires to which data signals are applied, wherein the scanning wires and the signal wires cross each other. TFTs, electrically connected to the scanning wires and the signal wires, each of which is provided in the vicinity of an intersection of the scanning wire and the signal wire, and the TFTs are connected to pixel electrodes. A dummy pixel driven by a dummy signal wire is provided externally adjacent to an endmost pixel column. This brings about a matrix type liquid crystal display device that equalizes capacitive conditions of all the signal wires to each other and can prevent deterioration of display quality that is brought about by a specific portion differently displayed.

Abstract: In one embodiment of the present invention, a liquid crystal driving semiconductor IC for driving a display panel includes an output terminal connected to the display panel, an output circuit block including a DAC circuit, and a spare output block including a DAC circuit, the DAC circuits and being connectable to the output terminal. The IC includes an op amp for comparing output signal from the DAC circuit with that of the DAC circuit, and judging circuit for judging, based on the comparison result of the op amp, whether the DAC circuit is defective, and switches and for, if the DAC circuit is defective, connecting the spare DAC circuit to the output terminal in replacement of the defective DAC circuit. This provides an IC for driving a display device, which IC has concrete measures to easily detect a defect in an output circuit, and can perform self-healing for the defect in the output circuit.

Abstract: A liquid crystal display (“LCD”) includes; a gate line, a plurality of pairs of a first data line and a second data line which border a plurality of pixel regions and are disposed respectively on both sides of each pixel region, a plurality of pairs of first and second thin-film transistors (“TFTs”) which are connected to the gate line and a pair of the first and second data lines, and a first and second subpixel electrode disposed in each pixel region and connected to the first and second TFTs, respectively, wherein the pixel regions include first through third pixel regions arranged in the first direction, wherein at least one of the first and second TFTs of the second pixel region is disposed on a same side of an adjacent data line as the first and second subpixel electrodes of one of the first and third pixel regions.

Abstract: A liquid crystal display device includes: first and second substrates positioned so as to face each other; and a liquid crystal layer interposed between the first and second substrates, and containing a polymerizable component that is polymerized by light or heat. The polymerizable component of the liquid crystal layer is polymerized with a predetermined voltage being applied to a region corresponding to those pixels whose transmittance-drive voltage characteristics are shifted toward higher voltages in a normal drive operation, where the predetermined voltage is applied so that the transmittance-drive voltage characteristics are shifted toward lower voltages by an amount equal to or larger than an amount of the shift toward higher voltages.

Abstract: An electronic display device includes a display unit that displays images and a barrier unit between the display unit and a user, and provides images to the user as two-dimensional images or stereoscopic images. The barrier unit includes first electrodes on a first surface, the first electrodes being spaced apart from each other, second electrodes on the first surface, at a first gap from the first electrodes and between the first electrodes, auxiliary electrodes on a second surface, corresponding to the first gap, the auxiliary electrodes configured to be driven in synchronization with any one of the two-dimensional images and the stereoscopic images, a common electrode on a third surface, and a liquid crystal layer between the common electrode and first, second, and auxiliary electrode. A barrier driver controls the barrier unit in accordance with whether two-dimensional images or stereoscopic images are to be displayed.

Abstract: A backlight unit shortens the necessary time from the time immediately after the turn on to the time the emitted light is converged to a predetermined chromaticity while the quality of time-varying images is improved. Under the control of the backlight controller section, the Light-Emitting Diodes (LEDs), which are assigned to the respective light-emitting regions of the light-emitting surface, are driven to emit lights sequentially in the predetermined scanning light-emitting periods for the scan type lighting and the additional light-emitting periods in a single frame, responsive to the write scanning of an image signal to the LCD panel. The additional light-emitting periods are outside a corresponding one of the scanning light-emitting periods. In each additional light-emitting period, the LEDs emit light in synchronization with the supply of the optical leakage preventing signal (e.g., the black inserting signal) to the LCD panel.

Abstract: The invention provides a light emitting device which is capable of displaying on both sides, has a small volume, and is capable of being used as a module. A light emitting element represented by an EL element and the like is used in a pixel portion, and two pixel portions are provided in one light emitting device. A first pixel portion has a structure to emit light only from a counter electrode side of the light emitting element. A second pixel portion has a structure to emit light only from a pixel electrode side of the light emitting element. That is, in the first pixel portion and the second pixel portion, directions of light emission are reverse in front and back.

Abstract: An electrophoretic display device includes a first substrate and a second substrate that face each other, an electrophoretic element disposed between the first substrate and the second substrate, the electrophoretic element including electrophoretic particles, a display unit that has a plurality of pixels including the electrophoretic element, a common electrode that is formed on an electrophoretic element side of the second substrate, and a first control line and a second control line that are formed in either the first substrate or the second substrate. Each of the plurality of pixels includes a pixel switching element, a memory circuit that is connected to the pixel switching element, a switching circuit that is connected to the memory circuit, and a first pixel electrode and a second pixel electrode that are connected to the switching circuit and are disposed to face the common electrode.

Abstract: A variable capacitor is formed from a pair of electrodes and a dielectric interposed between the electrodes over a substrate, and an external input is detected by changing capacitance of the variable capacitor by a physical or electrical force. Specifically, a variable capacitor and a sense amplifier are provided over the same substrate, and the sense amplifier reads the change of capacitance of the variable capacitor and transmits a signal in accordance with the input to a control circuit.

Abstract: A liquid crystal display is described. The liquid crystal display includes a common voltage generation unit that swings first and second common voltages in opposite directions every a predetermined period of time using two voltage levels, a plurality of first longitudinal common lines that are formed parallel to data lines to supply the first common voltage input through first input units to first pixel common line patterns formed in first pixel units, and a plurality of second longitudinal common lines that are formed parallel to the data lines to supply the second common voltage input through second input units to second pixel common line patterns formed in second pixel units.

Abstract: A liquid crystal display includes a plurality of data lines and a plurality of pixels arranged in a matrix, wherein the plurality of pixels include a first pixel and a second pixel, and each of the first pixel and the second pixel includes a first subpixel electrode and a second subpixel electrode, a first switching element, a second switching element, a third switching element, and a voltage-changing capacitor, wherein a first source electrode on the first switching element and a second source electrode on the second switching element from the first pixel are connected to a data line, the first source electrode and the second source electrode of the second pixel are disconnected from the plurality of data lines, and the two terminals of the voltage-changing capacitor of the second pixel are shorted to each other.

Abstract: A liquid crystal display comprising: a receiver for receiving power and differential signal; a backlight power supply which supplies the power to a backlight unit; a power-off sensor which senses power-off of the backlight power supply and distorts one of the differential signals; and a controller which senses the distortion of the differential signal and generates an after-image removing gray-scale signal.

Abstract: A display device includes gate lines; data lines; charge control lines each including a charge control voltage input pad; first and second thin film transistors (TFTs) each including control and input electrodes connected to the gate and data lines, respectively; a first liquid crystal capacitor connected to an output electrode of the first TFT; a second liquid crystal capacitor connected to an output electrode of the second TFT; a charge control TFT including a control electrode and an input electrode connected to one of the charge control lines and the second pixel electrode, respectively; and a charge-down capacitor connected to an output electrode of the charge control TFT. A duration time of a turn-on voltage pulse applied to the charge control TFT is different from a duration time of a turn-on voltage pulse applied to the first TFT transistor or the second TFT.

Abstract: A liquid crystal display apparatus is composed of a plurality of pixels, a plurality of switches and a driver circuit for driving the plurality of switches. Each of the plurality of pixels is provided with a liquid crystal element in which a liquid crystal layer is sandwiched between a pixel driving electrode and a common electrode confronting with each other, a first sampling and holding circuit, a second sampling and holding circuit and a switching device. The switching device switches a positive image signal voltage and a negative image signal voltage, and supplies the positive and negative image signal voltages alternately to the pixel driving electrode.