Abstract: A data signal output circuit is divided into a plurality of blocks, each having its own supply circuit. In each block, a plurality of shift register sections, constituting a shift register, output pulse signals which have been shifted according to clock signals. Driving sections sample a digital image signal in synchronism with the pulse signal, and output data signals corresponding to the image signal thus sampled to a plurality of output lines. Each supply circuit provided in the blocks receives the image signal when the image signal should be sampled by the driving sections, thereby supplying the image signal only to the minimum number of blocks to be operated. In this manner, the image signal is selectively supplied to the block so as to reduce the effective load on the image signal. As a result, the power consumption generated in the image signal lines can be reduced.

Abstract: A driving circuit in a matrix type image display apparatus including a plurality of groups each including four standard unit circuits and one backup unit circuit. Each standard unit circuit includes disconnecting means for isolating the standard unit circuit from the driving circuit, and the backup unit circuit includes connecting means for connecting the backup unit circuit to an input signal line and an output signal line of any of the standard unit circuits within a group. The number of the backup unit circuits can be changed in accordance with a conforming ratio of each unit circuit, which makes it possible to eliminate idle backup unit circuits while maintaining a high overall conforming ratio of the driving circuit, thereby enhancing manufacturing efficiencies and reducing manufacturing costs.

Abstract: An active matrix type image display apparatus which includes: a plurality of data signal lines; a plurality of scanning signal lines crossing the plurality of data signal lines; and a plurality of pixel portions disposed in a matrix in areas enclosed by the plurality of data signal lines and the plurality of scanning signal lines, wherein each of the plurality of pixel portions includes: a pixel capacitor for storing electric charge supplied from at least one of the plurality of data signal lines, to display an image; storage unit connected to the pixel capacitor; and switching unit which alternately selects one of an operation for electrically connecting the pixel capacitor to the storage unit and an operation for electrically disconnecting the pixel capacitor from the storage unit.

Abstract: A matrix-type display device in which a number of pixels are arranged and a scanning line and a signal line to which a display signal is output are connected to each pixel. A signal line driver circuit in which a decoder circuit is controlled by a counter circuit, or a scanning line driver circuit in which a decoder circuit is controlled by a counter circuit is divided into a plurality of sections. A clock signal and/or a power supply voltage is selectively supplied to the respective sections.

Abstract: A scanning circuit is provided with a plurality of address lines and AND circuits. The address lines respectively supply bit signals constituting an address signal and inverted bit signals, and each AND circuit conducts a logical operation on a predetermined number of bit signals and inverted bit signals selected from the bit signals and inverted bit signals supplied from the address lines. The AND circuits are connected to the address lines so that only one bit is switched when the address signal carries. Furthermore, a frequency of the least significant bit of the address signal is set to 1/4 of the dot frequency, while the two bits at the high end are set to have the same frequency and a phase difference of 90.degree. each other. With the described arrangement, a phase shift is prevented from occurring to an outputted signal when the address signal carries.

Abstract: A matrix display apparatus includes a matrix of pixels divided into a plurality of groups of pixels and data signal lines for delivering a data signal to a pixel. The data signal lines are distributed along the direction of a column. The apparatus also includes scanning signal lines for applying a scanning signal to a pixel, the scanning signal lines being distributed along the direction of a row. The apparatus also includes a first switch, disposed from each of the plurality of pixels, for allowing the data signal to be applied to the corresponding pixel based on the scanning signal. The apparatus also includes a second switch, disposed for each of the pixels in at least one of the plurality of the pixel groups, for controlling a timing for allowing the data signal to be applied to the corresponding pixel. The second switch is connected in series to the first switch between the first switch and the data signal line.

Abstract: In order to sufficiently save the power consumption and to lower the withstand voltage of elements, by having one data signal line per one row of pixels and one scanning signal line per one line of pixels, the polarity of data written in the data signal line is varied each one field period. The power source magnitude of the scanning signal lines to be written is further varied each one field period. Specifically, on opposing sides of the pixel array, data signal line driving circuits are provided. The data signal line driving circuits supply voltages of different magnitude and polarity. Adjoining pairs of data signal lines are connected to each of the data signal line driving circuits with analog switches. In a certain display period, such as every field period, the analog switches each select one of a pair of adjacent data signal lines. In the next display period, the reverse selection is made.

Abstract: An image display device includes an operational amplifier, a signal amplifier provided with a condenser for setting a gain of the operational amplifier, a signal amplifier circuit having such signal amplifier or a buffer amplifier, the signal amplifier circuit being provided with an offset adjusting function, and a data signal line drive circuit having a signal amplifier or a signal line drive circuit. The described arrangement enables the gain of the signal amplifier to be set by a capacitance of the condenser, thereby providing a signal amplifier circuit which permits the gain to be set much more precisely as compared to the conventional signal amplifier circuits even when adopting a signal amplifier formed on a semiconductor thin film such as a polycrystalline silicone thin film. The arrangement also provides a signal amplifier circuit which permits a voltage in the same level as a voltage of the input signal to be outputted.

Abstract: An active-matrix image display device which includes n shift registers, analog switches for sampling video input signals and a data-signal-line driving circuit to which n series of clock signals and n.times.m series of video input signals are input, and controls the analog switches according to the result of a logic operation of output pulses from successive l stages in the shift registers. A scanning circuit without using shift registers. Here, n is an integer not smaller than one, m and l are integers not smaller than two. With the image display device, sampling of video signals is surely executed without increasing the number of shift registers. It is thus possible to reduce the size and weight of the image display device and to decrease the defect rate thereof. Moreover, the scanning circuit achieves a higher yield compared with a conventional scanning circuit using a shift register.

Abstract: A matrix type display apparatus includes pixel electrodes arranged in a matrix, data signal lines and scanning signal lines for driving the pixel electrodes, and a data signal line driving circuit. The data signal line driving circuit includes sampling capacitors for keeping sampled data obtained by sequentially sampling image data over one horizontal scanning period, holding capacitors for holding the sampled data transmitted from the sampling capacitors upon termination of the horizontal scanning period and then outputting the sampled data to data signal lines, and a precharging circuit for precharging the corresponding holding capacitors by applying a predetermined voltage to the holding capacitors before the sampled data is transmitted to the holding capacitors.

Abstract: In a semiconductor device wherein an active device circuit and electrically conductive lines, such as a power source line for supplying power to the semiconductor active device circuit or signal lines for inputting a signal to the semiconductor active device circuit, are formed together on a single substrate, an improved arrangement wherein a conventional power source or signal line is formed by using a plurally of individual lines of substantially uniform electrical resistance where the electrical resistance of each line is limited to a predetermined value. Moreover, a waveform deterioration response signal component is added to a signal transmitted through the signal lines so as to improve the transmitted signal by compensating for waveform deterioration experienced during circuit operation. In addition, an electrical capacity forming electrode is provided alongside substantial length of the power source line.

Abstract: An active matrix type image display apparatus which includes: a plurality of data signal lines; a plurality of scanning signal lines crossing the plurality of data signal lines; and a plurality of pixel portions disposed in a matrix in areas enclosed by the plurality of data signal lines and the plurality of scanning signal lines, wherein each of the plurality of pixel portions includes: a pixel capacitor for storing electric charge supplied from at least one of the plurality of data signal lines, to display an image; storage unit connected to the pixel capacitor; and switching unit which alternately selects one of an operation for electrically connecting the pixel capacitor to the storage unit and an operation for electrically disconnecting the pixel capacitor from the storage unit.

Abstract: A deodorizing air filter is capable of improving the strength and deodorizing ability while suppressing an increase of ventilation resistance and pressure loss. A filter body has a series of filter pieces which are formed into a zigzagged shape by folding along multiple folds of parallel lines of the filter element. The filter body is made of the deodorizing section and the filtering section formed alternatively, the filtering section of the air serves as a filter and deodorizer for the air, and the deodorizing section serves as a deodorizer for the air. As the deodorizing section does not serve as a filter, it is not necessary to make the pitch of each piece of the filtering section smaller. As a result, it is possible to suppress the increase of ventilation resistance and pressure loss.