摘要:
The shift register of this invention for sequentially transferring a digital signal in synchronization with a clock signal includes: a plurality of circuit blocks connected in series, each including a prescribed number of sequential latch circuits, each latch circuit outputting a signal corresponding to an input signal based on the clock signal; and a plurality of clock signal control circuits provided for the respective circuit blocks for controlling the supply of the clock signal to the latch circuits in the corresponding circuit blocks, wherein the control of the supply of the clock signal by each clock signal control circuit to the latch circuits in the corresponding circuit block is conducted in response to output signals from prescribed latch circuits in the circuit blocks preceding and subsequent to the corresponding circuit block.
摘要:
An active matrix display device has a number of pixels arranged in matrix form, signal lines for supplying display signals to the pixels, and a driver circuit for driving the signal lines. The driver circuit includes a frequency divider circuit for frequency-dividing input multi-phase clock signals, a synchronous counter circuit for frequency-dividing part of the input multi-phase clock signals, and a decoder circuit for selecting a desired one of the signal lines based on outputs of the frequency divider circuit and the synchronous counter circuit.
摘要:
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.
摘要:
An active matrix display device has a number of pixels arranged in matrix form, signal lines for supplying display signals to the pixels, and a driver circuit for driving the signal lines. The driver circuit includes a frequency divider circuit for frequency-dividing input multi-phase clock signals, a synchronous counter circuit for frequency-dividing part of the input multi-phase clock signals, and a decoder circuit for selecting a desired one of the signal lines based on outputs of the frequency divider circuit and the synchronous counter circuit.
摘要:
A scanning circuit for a display device having an array of pixels. One embodiment of the scanning circuit includes L scan control signal lines, first logic circuits to operate on signals from M of the L scan control signal lines, flip-flop circuits communicating with the first logic circuits, N timing control signal lines, and second logic circuits coupled to operate on signal from the N timing control signal lines and the flip-flop circuits.
摘要:
There is disclosed an active matrix liquid crystal display that receives input signals having small amplitudes and needs no externally attached level-shifting circuit. The active matrix liquid crystal display has a level-shifting circuit for amplifying various input signals, such as control signals, a clock signal, and a start pulse signal, and supplying the amplified signals to peripheral driver circuits. These peripheral driver circuits drive an active matrix circuit. The level-shifting circuit is made of a differential amplifier consisting of polysilicon TFTs. This amplifier is an analog amplifier. This level-shifting circuit is fabricated on the same substrate as the active matrix circuit and the peripheral driver circuits. If the amplitudes of the input signals are small, level-shifting operations can be performed well. Since any externally attached level-shifting circuit is dispensed with, the cost can be curtailed.
摘要:
In a field-effect transistor, one of the distance between a gate electrode and a source electrode and the distance between the gate electrode and a drain electrode which one distance is on a side where a signal of a high frequency is applied is made longer than the other distance on a side where a signal of a low frequency is applied.
摘要:
A driving circuit of a liquid crystal display device including a first insulating substrate on which a plurality of signal lines and a plurality of scan lines are disposed, and pixel transistors made of thin film transistors are disposed in matrix at intersection points of those lines; a second insulating substrate opposite to the first insulating substrate; and a liquid crystal held between the first and second insulating substrates, in which the driving circuit is disposed on the first insulating substrate; each of clock lines or base portions of the clock lines for supplying clock signals to the driving circuit is made of a two-layer structure of the same wiring material as a gate electrode of the thin film transistor and the same wiring material as a source electrode or drain electrode of the thin film transistor; and a wiring line crossing the clock lines or the base portions of the clock lines is made of a wiring line in the same layer as a black matrix covering the pixel transistors.
摘要:
A driving circuit of a liquid crystal display device including a first insulating substrate on which a plurality of signal lines and a plurality of scan lines are disposed, and pixel transistors made of thin film transistors are disposed in matrix at intersection points of those lines; a second insulating substrate opposite to the first insulating substrate; and a liquid crystal held between the first and second insulating substrates, in which the driving circuit is disposed on the first insulating substrate; each of clock lines or base portions of the clock lines for supplying clock signals to the driving circuit is made of a two-layer structure of the same wiring material as a gate electrode of the thin film transistor and the same wiring material as a source electrode or drain electrode of the thin film transistor; and a wiring line crossing the clock lines or the base portions of the clock lines is made of a wiring line in the same layer as a black matrix covering the pixel transistors.
摘要:
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.