Abstract: A shift register having a plurality of stages connected in cascade shifts an output signal by a plurality of clocks having different phases. Each of the stage includes an input diode to which a signal is input from a preceding stage, a capacitor for holding charge having a voltage level of the input signal, a first transistor that is turned on or off by the held voltage level to output an output signal to a following stage in synchronization with a clock signal, and a second transistor connected between the input diode and an output terminal. A control electrode of the second transistor is connected to the input diode in the following stage. The second transistor has a clamping function for discharging the accumulated charge and turning off the first transistor when the clock signal is phase-shifted.

Abstract: The present invention provides a load capacity driving circuit capable of implementing low power consumption. Switches become closed in an initialization period, and a constant current source allows a bias current to flow through a drain of a MOS transistor, which causes a voltage determined by the current to be generated between a source and a gate thereof. A differential voltage between the potential of the gate of the MOS transistor and an input voltage is stored in a capacitor, and a load capacitor is connected to Vss to be discharged. In a subsequent output period, the switches become open, and switches become closed. Then, the capacitor is connected to the load capacitor, and the MOS transistor is turned on due to a decrease in the potential of the gate, so that the load capacitor is charged until the potential of the gate is restored.

Abstract: An image-signal driving circuit inputs serial sequences of image data DA, DB, and DC for key or primary colors, converts the image data into parallel data for displaying one line on a display, and supplies the parallel data to the display. The image-signal driving circuit comprises a register that inputs sequences of image data for the number of primary colors, stores the image data in order, and outputs the image data as parallel data; a latch that latches the sequences of image data for the number of primary colors output from the register as the parallel data; and a selector that selects one sequence of image data from the sequences of image data for the number of primary colors latched by the latch in predetermined order, and supplies the image data to the display.

Abstract: A capacitance detecting circuit detects, in terms of voltage, change in capacitance at intersections of a plurality of column lines and a plurality of row lines crossing each other. The capacitance detecting circuit includes a column-line driving unit for driving a column line; a row-line selector for selecting a specific row line from the plurality of row lines; and a capacitance calculator for calculating a capacitance at an intersection of the specific row line and the driven column line based on a reference current that flows in relation to a reference capacitance and a current that flows in relation to the capacitance at the intersection.

Abstract: A display device includes, on a first substrate of a pair of substrates, data lines and scanning lines crossing in the form of a matrix. Among the data lines, a first group of data lines lead to a first side of the first substrate, and a second group of data lines, other than the first group of data lines, lead to a second side positioned opposite to the first side. The display device includes a display screen in which the surface of the one substrate is divided into dots by the data lines and the scanning lines and each set of a predetermined number of adjacent dots constitutes each pixel. All data lines which are connected to the predetermined number of adjacent dots constituting the pixel in the display screen lead to a single side among the sides of the first substrate.

Abstract: A first comparator circuit compares an input voltage from a D/A converter with an output voltage. A second comparator compares the input voltage with a predetermined reference voltage. The second comparator circuit includes an even number of stages of inverters, which are connected together, and analog switches. In the second comparator circuit, the input voltage is quickly input just before the initialization, and then a first analog switch is opened and a second switch is closed, thereby suppressing the power consumption. A switch control circuit controls switching of switches, i.e., from a third switch to a tenth switch, in accordance with the determination output of the second comparator circuit, a write signal, and an output initialization signal.

Abstract: When a set signal goes high, a gate-source voltage is stored by an input capacitor such that an NMOS transistor maintains a source potential at a drain current. Next, when a set signal goes low and a write signal goes high, the NMOS transistor performs a source-follower operation and enters a stable state while charging a load capacitor. At timing when writing into the load capacitor is finished, the set signal and the write signal are put into low states. By doing this, the writing voltage is stored by the load capacitor. At the same time, current sources are forcibly turned off and the flow of a very small amount of bias current completely stops so that no power is consumed.

Abstract: A pixel resolution converting circuit enlarges an image by vertically and horizontally doubling the pixel resolution without degrading image quality due to reduction in the density of displayed information. A 3-by-3 (nine) pixel array pattern of input image data, including a pixel to be converted and eight pixels vertically, horizontally, and diagonally surrounding the pixel to be converted, is compared with specific array patterns selected from all possible array patterns formed by combinations of the 3-by-3 (nine) pixel binary image data. As a result, it is determined whether the array pattern of the input image data matches the specific array patterns. If the input image data matches any one of the specific array patterns, image data differing from that of the pixel to be converted is applied to part of image data corresponding to four pixels obtained by vertically and horizontally doubling the pixel to be converted.

Abstract: An image display device includes a display panel having predetermined numbers of pixels defined in horizontal and vertical directions, respectively, and an interpolated-data generation circuit whereby an expanded image data is produced in such a manner that when the number of pixels in the horizontal direction of the display panel is greater than the number of pixels in the horizontal direction of a given image signal, the interpolated-data generation circuit directly stores a plurality of image data A, B, C, D, E of the original image signal along one horizontal line at data storage locations closest to the original locations, and data at data storage locations remaining after storing all original data are given the results X, Y, and Z obtained by calculation from two original image data at locations adjacent to the respective remaining data storage locations thereby expanding the original image signal to have a resolution well matched to the resolution of the display panel without causing a reduction in con

Abstract: There is provided a drive method for a liquid crystal display device in which a line crawling phenomenon is not visually recognized when inversion driving is employed to a liquid crystal display device of a double scanning line system having a lateral-stripe color filter. Polarity inversion is performed every multiple-of-two pixel electrodes such as every two dots, every four dots, . . . , in a direction along a data line, and liquid crystal drive voltages subjected to polarity inversion every two dots controlled by the same data line in a direction along a gate line are applied to pixel electrodes, respectively.

Abstract: A display device includes, on a first substrate of a pair of substrates, data lines and scanning lines crossing in the form of a matrix. Among the data lines, a first group of data lines lead to a first side of the first substrate, and a second group of data lines, other than the first group of data lines, lead to a second side positioned opposite to the first side. The display device includes a display screen in which the surface of the one substrate is divided into dots by the data lines and the scanning lines and each set of a predetermined number of adjacent dots constitutes each pixel. All data lines which are connected to the predetermined number of adjacent dots constituting the pixel in the display screen lead to a single side among the sides of the first substrate.

Abstract: An image-signal driving circuit inputs serial sequences of image data DA, DB, and DC for key or primary colors, converts the image data into parallel data for displaying one line on a display, and supplies the parallel data to the display. The image-signal driving circuit comprises a register that inputs sequences of image data for the number of primary colors, stores the image data in order, and outputs the image data as parallel data; a latch that latches the sequences of image data for the number of primary colors output from the register as the parallel data; and a selector that selects one sequence of image data from the sequences of image data for the number of primary colors latched by the latch in predetermined order, and supplies the image data to the display.

Abstract: An image display device includes a display panel having predetermined numbers of pixels defined in horizontal and vertical directions, respectively, and an interpolated-data data generation circuit whereby an expanded image data is produced in such a manner that when the number of pixels in the horizontal direction of the display panel is greater than the number of pixels in the horizontal direction of a given image signal, the interpolated-data generation circuit directly stores a plurality of image data A, B, C, D, E of the original image signal along one horizontal line at data storage locations closest to the original locations, and data at data storage locations remaining after storing all original data are given the results X, Y, and Z obtained by calculation from two original image data at locations adjacent to the respective remaining data storage locations thereby expanding the original image signal to have a resolution well matched to the resolution of the display panel without causing a reduction i

Abstract: An image display device includes a display panel having predetermined numbers of pixels defined in horizontal and vertical directions, respectively, and an interpolated-data generation circuit whereby an expanded image data is produced in such a manner that when the number of pixels in the horizontal direction of the display panel is greater than the number of pixels in the horizontal direction of a given image signal, the interpolated-data generation circuit directly stores a plurality of image data A, B, C, D, E of the original image signal along one horizontal line at data storage locations closest to the original locations, and data at data storage locations remaining after storing all original data are given the results X, Y, and Z obtained by calculation from two original image data at locations adjacent to the respective remaining data storage locations thereby expanding the original image signal to have a resolution well matched to the resolution of the display panel without causing a reduction in con

Abstract: A matrix-addressed liquid crystal display device, and its driving method in which pixels to display one color by combining a plurality of basic colors are arranged, the power consumption in a drive circuit system is reduced, and no degradation of the image quality is generated, is characterized by comprising a signal input means N, wherein a large number of pixels are matrix-addressed by a large number of scanning lines G and a large number of signal lines S, combination of a plurality of basic colors are repeatedly arranged along the direction of each signal line, the number of the scanning lines is the number of all pixels arranged along the signal lines, the order of the basic colors arranged along the signal lines is repeatedly the same number along the signal lines, the same basic colors are arranged along the scanning lines, and the signal to be transmitted to each signal line for each scanning line is successively transmitted to a source driver from the source driver Sd.

Abstract: In a color liquid crystal display unit capable of making oblique stripes in a beat noise form inconspicuous, interlaced driving is adopted, a color filter having colors different for each dot is used, the color arrangement in the color filter is distributed uniformly over the entire frame, and nearby dots in the same color is driven by driving voltage having different polarity in the same field.

Abstract: A matrix-addressed liquid crystal display device, and its driving method in which pixels to display one color by combining a plurality of basic colors are arranged, the power consumption in a drive circuit system is reduced, and no degradation of the image quality is generated, is characterized by comprising a signal input means N, wherein a large number of pixels are matrix-addressed by a large number of scanning lines G and a large number of signal lines S, combination of a plurality of basic colors are repeatedly arranged along the direction of each signal line, the number of the scanning lines is the number of all pixels arranged along the signal lines, the order of the basic colors arranged along the signal lines is repeatedly the same number along the signal lines, the same basic colors are arranged along the scanning lines, and the signal to be transmitted to each signal line for each scanning line is successively transmitted to a source driver from the source driver Sd.

Abstract: A display apparatus allows size reduction without increasing manufacturing cost and can provide the greatest possible power saving effect by drive-method switching. The display apparatus has a moving-image/still-image determination circuit having an adder adding digital signals for one screen by receiving digital signals on a pixel basis of individual pixels constituting image signals for one screen, having a comparator comparing a result of addition of digital signals constituting image signals of an immediately-preceding screen and a result of addition of digital signals constituting image signals of the current screen, using a result of the comparison by the comparator 15 to determine the images to be moving images when the addition results are different from each other and to determine the images to be still images when the addition results are identical to each other, and outputting a determination signal according to the respective images.

Abstract: A driving method is provided in which power consumption is reduced in a driving circuit system and which does not cause a decrease in the image quality in a display device in which pixels which display one color by combining a plurality of basic colors are arrayed and matrix-driven.

Abstract: To provide a liquid crystal display making it possible to decrease the number of signal lines to avoid narrowing the pitch of the terminal portion of a data driver and to decrease power consumption and cost.Control lines CA and CB are used which are arranged in parallel with signal lines Dj on both sides of each signal line Dj to switch on/off switching devices T.sub.CA and T.sub.CB connected in series with the switching device T.sub.G of each pixel switched on/off by control signals in these control lines CA and CB and selects pixels in which image data is written. In this case, the level of a control signal is changed to H/L for each field or each horizontal scanning line and moreover, the polarity of an image signal to be supplied to the signal line Dj is properly changed. Furthermore, a cancel signal for controlling fluctuation in counter electrode potentials is superimposed on a control signal.