US 7,679,619 B2 · Data outputting method, data outputting device, liquid crystal panel driving device, and liquid crystal display device

Abstract

A data outputting method is provided which is capable of reducing a memory capacity of a LUT (Look-Up Table). Compressed data obtained by dropping low-order bits making up gray-level data is stored in a manner in which the compressed data can be accessed by high-order bits to be input to the LUT. High-order bits making up an address output from an address supplying unit are supplied to the LUT and low-order bits are supplied to a computing unit. The LUT outputs compressed gray-level data corresponding to the high-order bits and compressed gray-level data corresponding to data of (high-order bit+1). The computing unit outputs each of expanded gray-level data obtained by dividing data obtained by interpolation among one expanded gray-level data, another expanded gray-level data and, third expanded data for every high-order bit based on one compressed data, other compressed data, and lower-bits.

Claims31

Dependent claims

A data outputting method for interpolating and outputting data based on an input address comprising:

a step of, when an address is input, generating a first memory address which is made up of a specified address high-order bit portion of the input address, and obtained by excepting a specified address low-order bit portion from the input address;
a step of reading from a data storing unit a first compressed data stored at the first memory address and a second compressed data stored at a second memory address associated with the first memory address, and the first compressed data and the second compressed data which each are compressed by excepting a specified low-order bit part from respective original data;
a step of expanding the first compressed data and the second compressed data, based on the specified address low-order bit portion of the input address, the read first compressed data;
and the read second compressed data, to obtain a first expanded data and a second expanded data;
a step of performing interpolation between the first expanded data and the second expanded data to obtain at least one expanded interpolation data;
and
a step of outputting the at least one expanded interpolation data, and at least one of the first expanded data and the second expanded data.

4 more elements

A liquid crystal panel driving method for interpolating and outputting gray-level data based on an input address and driving a liquid crystal panel in accordance with the output gray-level data, the method comprising:

a step of, when an address is input, generating a first memory address which is made up of a specified address high-order bit portion of the input address, and obtained by excepting a specified address low-order bit portion from the input address;
a step of reading from a data storing unit a first compressed gray-level data stored at the first memory address and a second compressed gray-level data stored at a second memory address associated with the first memory address, and the first compressed gray-level data and the second compressed gray-level data which each are compressed by excepting a specified low-order bit part from respective original gray-level data;
a step of expanding the first compressed gray-level data and the second compressed gray-level data, based on the specified address low-order bit portion of the input address, the read first compressed gray-level data, and the read second compressed gray-level data, to obtain a first expanded gray-level data and a second expanded gray-level data;
a step of performing interpolation between the first expanded gray-level data and the second expanded gray-level data to obtain at least one expanded interpolation gray-level data;
and
a step of outputting the at least one expanded interpolation gray-level data, and at least one of the first expanded gray-level data and the second expanded gray-level data to drive said liquid crystal panel.

3 more elements

A liquid crystal displaying method for interpolating and outputting gray-level data based on an input address and driving a liquid crystal panel in accordance with the output gray-level data to display an image, the method comprising:

a step of, when an address is input, generating a first memory address which is made up of a specified address high-order bit portion of the input address, and obtained by excepting a specified address low-order bit portion from the input address;
a step of reading from a data storing unit a first compressed gray-level data stored at the first memory address and a second compressed gray-level data stored at a second memory address associated with the first memory address, and the first compressed gray-level data and the second compressed gray-level data which each are compressed by excepting a specified low-order bit part from respective original gray-level data;
a step of expanding the first compressed gray-level data and the second compressed gray-level data, based on the specified address low-order bit portion of the input address, the read first compressed gray-level data, and the read second compressed gray-level data, to obtain a first expanded gray-level data and a second expanded gray-level data;
a step of performing interpolation between the first expanded gray-level data and the second expanded gray-level data to obtain at least one expanded interpolation gray-level data to display the image;
and
a step of outputting the at least one expanded interpolation gray-level data, and at least one of the first expanded gray-level data and the second expanded gray-level data to drive said liquid crystal panel.

3 more elements

A liquid crystal panel driving device for interpolating and outputting gray-level data based on an input address and driving a liquid crystal panel in accordance with the output gray-level data, the device comprising:

a data storing unit to store compressed gray-level data in advance;
a memory address generating unit to generate, when an address is input, a first memory address which is made up of a specified address high-order bit portion of the input address, and obtained by excepting a specified address low-order bit portion from the input address;
a reading unit to read from said data storing unit a first compressed gray-level data stored at the first memory address and a second compressed gray-level data stored at a second memory address associated with the first memory address, and the first compressed gray-level data and the second compressed gray-level data which each are compressed by excepting a specified low-order bit part from respective original gray-level data;
a data expanding unit to expand the first compressed gray-level data and the second compressed gray-level data, based on the specified address low-order bit portion of the input address, the read first compressed gray-level data, and the read second compressed gray-level data, to obtain a first expanded gray-level data and a second expanded gray-level data;
an interpolating unit to perform interpolation between the first expanded gray-level data and the second expanded gray-level data to obtain at least one expanded interpolation gray-level data;
and
an outputting unit to output the at least one expanded interpolation gray-level data, and at least one of the first expanded gray-level data and the second expanded gray-level data to drive said liquid crystal panel.

4 more elements

A liquid crystal display device for interpolating and outputting gray-level data based on an input address and driving a liquid crystal panel in accordance with the output gray-level data to display an image, the device comprising:

a data storing unit to store compressed gray-level data in advance;
a memory address generating unit to generate, when an address is input, a first memory address which is made up of a specified address high-order bit portion of the input address, and obtained by excepting a specified address low-order bit portion from the input address;
a reading unit to read from said data storing unit a first compressed gray-level data stored at the first memory address and a second compressed gray-level data stored at a second memory address associated with the first memory address, and the first compressed gray-level data and the second compressed gray-level data which each are compressed by excepting a specified low-order bit part from respective original gray-level data;
a data expanding unit to expand the first compressed gray-level data and the second compressed gray-level data, based on the specified address low-order bit portion of the input address, the read first compressed gray-level data, and the read second compressed gray-level data, to obtain a first expanded gray-level data and a second expanded gray-level data;
an interpolating unit to perform interpolation between the first expanded gray-level data and the second expanded gray-level data to obtain at least one expanded interpolation gray-level data;
and
an outputting unit to output the at least one expanded interpolation gray-level data, and at least one of the first expanded gray-level data and the second expanded gray-level data to drive said liquid crystal panel.

4 more elements

data storing means for storing compressed gray-level data in advance;
memory address generating means for generating, when an address is input, a first memory address which is made up of a specified address high-order bit portion of the input address, and obtained by excepting a specified address low-order bit portion from the input address;
reading means for reading from said data storing means a first compressed gray-level data stored at the first memory address and a second compressed gray-level data stored at a second memory address associated with the first memory address, and the first compressed gray-level data and the second compressed gray-level data which each are compressed by excepting a specified low-order bit part from respective original gray-level data;
data expanding means for expanding the first compressed gray-level data and the second compressed gray-level data, based on the specified address low-order bit portion of the input address, the read first compressed gray-level data, and the read second compressed gray-level data, to obtain a first expanded gray-level data and a second expanded gray-level data;
interpolating means for performing interpolation between the first expanded gray-level data and the second expanded gray-level data to obtain at least one expanded interpolation gray-level data;
and
outputting means for outputting the at least one expanded interpolation gray-level data, and at least one of the first expanded gray-level data and the second expanded gray-level data to drive said liquid crystal panel.

4 more elements

Dependencies are inferred from the claim text.

Data outputting method, data outputting device, liquid crystal panel driving device, and liquid crystal display device

Life of this patent

Data outputting method, data outputting device, liquid crystal panel driving device, and liquid crystal display device

Life of this patent

Abstract

Claims31