JP2002149138A5

JP2002149138A5 -

Info

Publication number: JP2002149138A5
Application number: JP2001235487A
Authority: JP
Filing date: 2001-08-02
Publication date: 2005-08-04
Anticipated expiration: 2021-08-02

Claims

In a liquid crystal display device having a plurality of pixels,
Each of the plurality of pixels includes a plurality of memory circuits.

In a liquid crystal display device having a plurality of pixels,
Each of the plurality of pixels has n × m storage circuits for storing digital video signals of n bits (n is a natural number, 2 ≦ n) for m frames (m is a natural number, 1 ≦ m). Liquid crystal display device.

In a liquid crystal display device having a plurality of pixels,
Each of the plurality of pixels includes a source signal line, n (n is a natural number, 2 ≦ n) write gate signal lines, n read gate signal lines, n write transistors, n N read-out transistors, n × m storage circuits for storing n-bit digital video signals for m frames (m is a natural number, 1 ≦ m), n write storage circuit selection units, and n A storage circuit selection unit for reading, and a liquid crystal element,
The gate electrodes of the n write transistors are electrically connected to different ones of the n write gate signal lines, respectively, and the source region and the drain region each have a source signal. The other is electrically connected to one of the different signal input units of the n write memory circuit selection units,
It said n write memory circuit selection portion has m signal output section, respectively, the m signal output section, respectively, are connected before Symbol electrically signal input of the memory circuit that different,
Said n read storage circuit selection portion has m signal input portion respectively, the m signal input unit, respectively, is the signal output unit electrically connected to the different that prior Symbol storage circuit,
Each of the gate electrodes of the n number of read transistors is electrically connected to any one of the n number of read gate signal lines, and one of the source region and the drain region is n. Each of the read memory circuit selection units is electrically connected to any one of different signal output units, and the other is electrically connected to one electrode of the liquid crystal element. Liquid crystal display device.

In a liquid crystal display device having a plurality of pixels,
Each of the plurality of pixels includes n (n is a natural number, 2 ≦ n) source signal lines, write gate signal lines, n read gate signal lines, n write transistors, n N read-out transistors, n × m storage circuits for storing n-bit digital video signals for m frames (m is a natural number, 1 ≦ m), n write storage circuit selection units, and n A storage circuit selection unit for reading, and a liquid crystal element,
Each of the gate electrodes of the n write transistors is electrically connected to the write gate signal line, and each of the source region and the drain region is a different one of the n source signal lines. and are electrically connected, the other person is said of the n write memory circuit selecting unit, connected differently either one electrically signal input section respectively,
It said n write memory circuit selection portion has m signal output section, respectively, the m signal output section, respectively, are connected before Symbol electrically signal input of the memory circuit that different,
Said n read storage circuit selection portion has m signal input portion respectively, the m signal input unit, respectively, is the signal output unit electrically connected to the different that prior Symbol storage circuit,
Each of the gate electrodes of the n number of read transistors is electrically connected to any one of the n number of read gate signal lines, and one of the source region and the drain region is n. Each of the read memory circuit selection units is electrically connected to any one of different signal output units, and the other is electrically connected to one electrode of the liquid crystal element. Liquid crystal display device.

In any one of Claim 3 or Claim 4,
The write memory circuit selection unit selects any one of the m memory circuits and is electrically connected to one of a source region and a drain region of the previous write transistor and stores the digital video signal Write to
The read memory circuit selection unit selects any one of the memory circuits in which the digital video signal is stored, and is electrically connected to one of a source region and a drain region of the read transistor. A liquid crystal display device which reads a stored digital video signal .

In claim 3,
A shift register that sequentially outputs sampling pulses in accordance with a clock signal and a start pulse;
A first latch circuit for holding an n-bit (n is a natural number, 2 ≦ n) digital video signal according to the sampling pulse;
A second latch circuit to which the n-bit digital video signal held in the first latch circuit is transferred;
A liquid crystal display device comprising: a bit signal selection switch that sequentially selects the n-bit digital video signal transferred to the second latch circuit bit by bit and outputs the selected signal to the source signal line.

In claim 4,
A shift register that sequentially outputs sampling pulses in accordance with a clock signal and a start pulse;
A first latch circuit that holds the digital video signal of 1 bit among digital video signals of n bits (n is a natural number, 2 ≦ n) according to the sampling pulse;
And a second latch circuit for transferring the 1-bit digital video signal held in the first latch circuit and outputting the 1-bit digital video signal to the source signal line. Liquid crystal display device.

In claim 4,
A shift register that sequentially outputs sampling pulses in accordance with a clock signal and a start pulse;
According to the sampling pulse, 1-bit digital video signal is held among n-bit (n is a natural number, 2 ≦ n) digital video signal, and the 1-bit digital video signal is output to the source signal line. And a first latch circuit.

In any one of Claims 1 thru | or 8,
The liquid crystal display device, wherein the memory circuit is a static memory (SRAM).

In any one of Claims 1 thru | or 8,
The liquid crystal display device, wherein the memory circuit is a ferroelectric memory (FeRAM).

In any one of Claims 1 thru | or 8,
The liquid crystal display device, wherein the memory circuit is a dynamic memory (DRAM).

In any one of Claims 1 thru | or 11,
The liquid crystal display device, wherein the memory circuit is formed on a glass substrate.

In any one of Claims 1 thru | or 11,
The liquid crystal display device, wherein the memory circuit is formed on a plastic substrate.

In any one of Claims 1 thru | or 11,
The liquid crystal display device, wherein the memory circuit is formed on a stainless steel substrate.

In any one of Claims 1 thru | or 11,
The liquid crystal display device, wherein the memory circuit is formed on a single crystal wafer.

In a driving method of a liquid crystal display device that displays an image using a digital image signal of n bits (n is a natural number, 2 ≦ n),
The liquid crystal display device includes a source signal line driving circuit, a gate signal line driving circuit, and a plurality of pixels. In the source signal line driving circuit,
A sampling pulse is output from the shift register and input to the latch circuit.
In the latch circuit, the digital video signal is held according to the sampling pulse,
The held digital video signal is written to the source signal line,
In the gate signal line driving circuit,
The gate signal line selection pulse is output and the gate signal line is selected,
In each of the plurality of pixels,
In the row where the gate signal line is selected,
Writing an n-bit digital video signal input from the source signal line to the storage circuit;
A driving method of a liquid crystal display device, wherein the n-bit digital video signal stored in the storage circuit is read.

In a driving method of a liquid crystal display device that displays an image using a digital image signal of n bits (n is a natural number, 2 ≦ n),
The liquid crystal display device includes a gate signal line driving circuit and a plurality of pixels. In the source signal line driving circuit,
A sampling pulse is output from the shift register and input to the latch circuit.
In the latch circuit, the digital video signal is held according to the sampling pulse,
The held digital video signal is written to the source signal line,
The gate signal line drive circuit outputs a gate signal line selection pulse, sequentially selects the gate signal lines from the first row,
In the plurality of pixels, the n-bit digital video signal is sequentially written from the first row.

In a driving method of a liquid crystal display device that displays an image using a digital image signal of n bits (n is a natural number, 2 ≦ n),
The liquid crystal display device includes a gate signal line driving circuit and a plurality of pixels. In the source signal line driving circuit,
A sampling pulse is output from the shift register and input to the latch circuit.
In the latch circuit, the digital video signal is held according to the sampling pulse,
The held digital video signal is written to the source signal line,
The gate signal line drive circuit selects a gate signal line selection pulse by specifying and outputting an arbitrary row of the gate signal line,
In the plurality of pixels, the n-bit digital video signal is written in an arbitrary row in which the gate signal line is selected.

In any one of Claims 16-18,
During the still image display period,
A driving method of a liquid crystal display device, wherein the source signal line driving circuit is stopped by repeatedly reading out the n-bit digital video signal stored in the memory circuit and displaying a still image.

An electronic device using the liquid crystal display device according to any one of claims 1 to 15.

An electronic device using the method for driving the liquid crystal display device according to any one of claims 16 to 19.

22. The electronic device according to claim 20, wherein the electronic device is any one of a television, a personal computer, a portable terminal, a video camera, and a head mounted display.