摘要:
A liquid crystal display device used in miniaturized portable equipment includes a distribution circuit to cope with a high-definition multi-grayscale display. A distribution circuit distributes an output of a drive circuit to a plurality of video signal lines within one scanning period, the distribution circuit being divided into a plurality of distribution circuits, and control signals being supplied to each distribution circuit from both end portions of each distribution circuit. When an output part of the drive circuit is configured such that a high withstand-voltage output amplifier and a low withstand-voltage output amplifier are alternately connected with the distribution circuit, a master function and a slave function are imparted to the drive circuit so as to allow the drive circuit to cope with odd-numbered outputs.
摘要:
A decoder circuit which outputs a voltage based on a 8-bit digital value includes: a first decoder circuit and a second decoder circuit which output one voltage respectively using upper-order 6 bits of the 8-bit digital value; a selection circuit which receives voltages outputted from the first decoder circuit and the second decoder circuit, and distributes the two voltages to three terminals; and an intermediate voltage output circuit which outputs an intermediate voltage which is a one of five kinds of values based on the three voltages. The first decoder circuit and the second decoder circuit respectively include a select-switch-type decoder circuit and a tournament-type decoder circuit. Due to such a constitution, it is possible to reduce a circuit scale of the decoder circuit which outputs the voltage corresponding to the 8-bit digital value.
摘要:
A bidirectional shift register capable of performing a stable shift operation in both directions and an image display device using the same are provided. In forward shift operation, when reference point N1 is at H level, (n+4)-th unit register circuit as a rear stage of the bidirectional shift register outputs pulse G(n+4) in synchronization with clock pulse V (n+4) inputted to (n+4)-th unit register circuit. A backward direction trigger signal VSTB is generated not only at the time of start of backward shift, but also, for example, in period (time t4 to t5) of one-phase clock immediately after G(n+4) is outputted in vertical blanking interval of the forward shift. The backward direction trigger signal VSTB is inputted to gate of a transistor provided to set reference point N1 of (n+4)-th unit register circuit to H level at the time of start of the backward shift.
摘要:
An object of the invention is to reduce the size of a decoder circuit of a display device. A decoder circuit which outputs voltages corresponding to 8-bit digital values includes a predecoder section, which includes an A decoder, B decoder, and C decoder, each of which is configured of a matrix type decoder circuit which carries out a three bits' worth of decoding, and a tournament type decoder circuit which carries out a three bits' worth of decoding, a selection circuit which, having input thereinto three voltages output respectively from the A decoder, B decoder, and C decoder, and applied to three output signal lines, selects two voltages of the three input voltages using a bit with one of the digital values and applies them to two output signal lines, and an intermediate voltage output circuit which, having input thereinto the two voltages selected by the selection circuit, outputs a voltage which is the average of the two voltages.
摘要:
A coordinate input device containing system table having a table portion for mounting thereon a monitor, a computer body and the like. The table portion includes a front table surface portion of flat and seamless as a whole, a top board having an accommodating portion formed to accommodate the coordinate input device in a lower level than the front table surface portion in a state of readiness to use, and a holding member fixed to the table portion at a reverse side thereof to support and fix the coordinate input device accommodated in the accommodated portion formed in the top board.
摘要:
A gate signal line driving circuit and a display device which can suppress the degradation of an element attributed to the use of the element for a long time, and can realize the prolongation of lifetime of the element are provided. With respect to elements to which a HIGH voltage is applied for a long time, a plurality of elements are connected in parallel, and at least some of the plurality of elements are driven by switching elements.
摘要:
A circuit that obtains a more accurate, output voltage from a plurality of input voltages is provided. A two-input single-output circuit includes a current source transistor allowing a predetermined current to flow, a cascode transistor section including two MOS transistors that are cascode-connected to the drain side of the current source transistor and have the same characteristics, a differential pair section having a first differential pair formed of a first input-side transistor and a first output-side transistor whose source lines are shared and a second differential pair formed of a second input-side transistor and a second output-side transistor whose source lines are shared, and a current mirror circuit section. Drain lines of the transistors of the cascade transistor section are respectively connected to the source lines of the first and second differential pairs.
摘要:
The stereoscopic display device has a display panel, a barrier liquid crystal panel disposed on the display panel, and a driving circuit for driving the display panel and the barrier liquid crystal panel, in which the frame frequency of the display panel and the alternating frequency of the barrier liquid crystal panel are different, the barrier liquid crystal panel is driven by a driving voltage input from the driving circuit, the driving circuit has an inverter circuit for outputting the driving voltage, independently controls a p-type transistor and an n-type transistor in the inverter circuit, and has time periods in which both the p-type transistor and the n-type transistor are turned off when the driving voltage is switched from a high level to a low level or a low level to a high level.
摘要:
A gate signal line driving circuit and a display device which can suppress the degradation of an element attributed to the use of the element for a long time, and can realize the prolongation of lifetime of the element are provided. With respect to elements to which a HIGH voltage is applied for a long time, a plurality of elements are connected in parallel, and at least some of the plurality of elements are driven by switching elements.
摘要:
The present invention is intended to minimize an amount of charge that flows from a step-up circuit into an external input voltage terminal when the power supply is turned off. A display device includes a display panel and a drive circuit that drives pixels included in the display panel. The drive circuit includes a power circuit to which a voltage Vcc is fed. The power circuit includes: a first step-up circuit that generates a voltage DDVDH which is higher than the voltage Vcc; a means 1 that when the first step-up circuit is de-energized, connects the voltage DDVDH output terminal of the first step-up circuit to a reference voltage terminal via a resistive element during a first period; and a means 2 that connects the voltage DDVDH output terminal of the first step-up circuit to an input terminal, to which the voltage Vcc is fed, during a second period succeeding the first period.