JP2002140051A5

JP2002140051A5 -

Info

Publication number: JP2002140051A5
Application number: JP2001242296A
Authority: JP
Filing date: 2001-08-09
Publication date: 2005-08-04
Anticipated expiration: 2021-08-09

Claims

In a liquid crystal display device having pixels,
The pixel includes a plurality of memory circuits and a D / A converter.

In a liquid crystal display device having pixels,
The pixel includes n (n is a natural number of 2 or more) storage circuits and a D / A converter that converts a digital signal stored in the n storage circuits into an analog signal. Liquid crystal display device.

Have pixels,
The pixel has a liquid crystal element,
In a liquid crystal display device in which an analog signal is input to the liquid crystal element,
The pixel includes n (n is a natural number of 2 or more) memory circuits and a D / A converter that converts a digital signal stored in the n memory circuits into the analog signal. Liquid crystal display device.

In a liquid crystal display device having pixels,
The pixel includes n × m (n and m are natural numbers greater than or equal to 2) memory circuits, and a D / D that converts n bits of digital signals stored in the n × m memory circuits into analog signals. A liquid crystal display device comprising an A converter.

Oite the liquid crystal display equipment having pixels,
The pixel includes n × m (n and m are natural numbers of 2 or more) memory circuits, and a D / D that converts n bits of digital signals stored in the n × m memory circuits into analog signals. A converter
The liquid crystal display device, wherein the pixels store digital signals for m frames.

In any one of Claims 1 thru | or 5,
A source signal line,
The liquid crystal display device, wherein the memory circuit and the D / A converter are arranged so as to overlap the source signal line.

In any one of Claims 1 thru | or 5,
A gate signal line;
The liquid crystal display device, wherein the memory circuit and the D / A converter are arranged so as to overlap the gate signal line.

Have pixels,
In the liquid crystal display device having a liquid crystal element, the pixel is
The pixel includes a source signal line, n (n is a natural number of 2 or more) gate signal lines, n TFTs, n memory circuits, and a D / A converter.
The gate electrodes of the n TFTs are respectively connected to one of the n gate signal lines, one of the source region and the drain region is connected to the source signal line, and the other is respectively Each of the n memory circuits is connected to one input terminal;
The output terminals of the n memory circuits are respectively connected to the input terminals of the D / A converter,
An output terminal of the D / A converter is connected to a liquid crystal element.

Have pixels,
In the liquid crystal display device having a liquid crystal element, the pixel is
The pixel includes a source signal line, n (n is a natural number of 2 or more) gate signal lines, n TFTs, n memory circuits, and a D / A converter having n input terminals. Have
The gate electrodes of the n TFTs are respectively connected to one of the n gate signal lines, one of the source region and the drain region is connected to the source signal line, and the other is respectively Each of the n memory circuits is connected to one input terminal;
The output terminals of the n memory circuits are respectively connected to one of the n input terminals of the D / A converter,
An output terminal of the D / A converter is connected to a liquid crystal element.

Have pixels,
In the liquid crystal display device having a liquid crystal element, the pixel is
The pixel includes n (n is a natural number of 2 or more) source signal lines, gate signal lines, n TFTs, n memory circuits, and a D / A converter.
The gate electrodes of the n TFTs are connected to the gate signal lines, one of the source region and the drain region is connected to each one of the n source signal lines, and the other is respectively Each of the n memory circuits is connected to one input terminal;
The output terminals of the n memory circuits are respectively connected to the input terminals of the D / A converter,
An output terminal of the D / A converter is connected to the liquid crystal element.

Have pixels,
In the liquid crystal display device having a liquid crystal element, the pixel is
The pixel includes n (n is a natural number of 2 or more) source signal lines, gate signal lines, n TFTs, n memory circuits, and a D / A converter having n input terminals. Have
The gate electrodes of the n TFTs are connected to the gate signal line, one of the source region and the drain region is connected to each one of the n source signal lines, and the other is respectively Each of the n memory circuits is connected to one input terminal;
The output terminals of the n memory circuits are respectively connected to one of the n input terminals of the D / A converter,
An output terminal of the D / A converter is connected to the liquid crystal element.

In claim 8 or claim 9 ,
A source signal line driver circuit;
The source signal line driver circuit includes a shift register, a first latch circuit that holds an n-bit digital signal by a sampling pulse from the shift register, and the n-bit digital signal held in the first latch circuit. A second latch circuit to which a signal is transferred; and a switch that sequentially selects the n-bit digital signal transferred to the second latch circuit bit by bit and inputs the digital signal to the source signal line. Liquid crystal display device.

In claim 8 or claim 9 ,
A source signal line driver circuit;
The source signal line driver circuit includes: a shift register; a first latch circuit that holds a 1-bit digital signal by a sampling pulse from the shift register; and the 1-bit digital that is held in the first latch circuit A liquid crystal display device comprising: a second latch circuit to which a signal is transferred.

In claim 10 or claim 11 ,
A source signal line driver circuit;
The liquid crystal display device, wherein the source signal line driver circuit includes a shift register and a first latch circuit that holds an n-bit digital signal by a sampling pulse from the shift register.

In claim 10 or claim 11 ,
A source signal line driver circuit;
The source signal line driver circuit includes a shift register, a first latch circuit that holds an n-bit digital signal by a sampling pulse from the shift register, and an n-bit digital signal held in the first latch circuit. A liquid crystal display device, comprising: n switches for inputting n to the n source signal lines.

In any one of Claims 1 to 15 ,
The liquid crystal display device, wherein the memory circuit is a static memory (SRAM), a ferroelectric memory (FRAM), or a dynamic memory (DRAM).

In any one of Claims 1 thru | or 16 ,
The liquid crystal display device, wherein the memory circuit is formed on a glass substrate, a plastic substrate, a stainless steel substrate, or a single crystal wafer.

In any one of Claims 1 thru | or 17 ,
A television, personal computer, portable terminal, video camera, or head mounted display using the liquid crystal display device.

In a driving method of a liquid crystal display device having a plurality of pixels arranged in a matrix,
Each of the plurality of pixels includes a plurality of storage circuits and a D / A converter,
A method for driving a liquid crystal display device, comprising: rewriting data in the plurality of storage circuits included in pixels in a specific row or pixels in a specific column among the plurality of pixels.

In a driving method of a liquid crystal display device having a plurality of pixels and a source signal line driving circuit for inputting a video signal to the plurality of pixels,
Each of the plurality of pixels includes a plurality of storage circuits and a D / A converter,
A method for driving a liquid crystal display device, wherein the operation of the source signal line driving circuit is stopped when displaying a still image.

In claim 19 or claim 20 ,
The method for driving a liquid crystal display device, wherein the memory circuit is a static memory (SRAM), a ferroelectric memory (FRAM), or a dynamic memory (DRAM).

In any one of Claims 19 to 21 ,
The method for driving a liquid crystal display device, wherein the memory circuit is formed on a glass substrate, a plastic substrate, a stainless steel substrate, or a single crystal wafer.

In any one of Claim 19 thru | or Claim 22 ,
A television, personal computer, portable terminal, video camera, or head mounted display using the liquid crystal display device of the driving method.

In a driving method of a portable information device having a liquid crystal display device and a CPU,
The liquid crystal display device includes, in a pixel, a plurality of storage circuits, a D / A converter, and a drive circuit that outputs signals to the plurality of storage circuits.
The CPU includes a first circuit that controls the driving circuit and a second circuit that controls a signal input to the portable information device,
A method for driving a portable information device, wherein the first circuit is stopped when the liquid crystal display device displays a still image.

In a driving method of a portable information device having a liquid crystal display device and a VRAM,
The liquid crystal display device includes a plurality of memory circuits and a D / A converter in a pixel,
When the liquid crystal display device displays a still image, the VRAM data reading operation is stopped.

In a driving method of a portable information device having a liquid crystal display device,
The liquid crystal display device includes a plurality of memory circuits and a D / A converter in a pixel,
When the liquid crystal display device displays a still image, a source signal line driving circuit of the liquid crystal display device is stopped.

In any one of claims 24 to 26 ,
The method for driving a portable information device, wherein the plurality of storage circuits are read once in one frame period.

In a driving method of a portable information device having a liquid crystal display device,
The liquid crystal display device has a plurality of pixels arranged in a matrix,
Each of the plurality of pixels includes a plurality of storage circuits and a D / A converter,
The liquid crystal display device rewrites data in the plurality of memory circuits included in a pixel in a specific row or a pixel in a specific column among the plurality of pixels.

In any one of claims 24 to 28 ,
The mobile information device is a mobile phone, a personal computer, a navigation system, a PDA, or an electronic book.