KR20130022562A - Driving apparatus for liquid crystal display device and method for driving the same - Google Patents

Abstract

PURPOSE: A driving device of a liquid crystal display and a driving method thereof are provided to improve an input output pin structure of a driving integrated circuit by improving a common voltage compensation supply structure of a liquid crystal panel. CONSTITUTION: A liquid crystal panel(2) is classified into a plurality of blocks. A gate driver(6) operates gate lines of the liquid crystal panel. A data driver(4) operates data lines. A common voltage supply unit(7) individually supplies first and second common voltage to each block. A timing controller(8) supplies video data to a data driver.

Description

DRIVING APPARATUS FOR LIQUID CRYSTAL DISPLAY DEVICE AND METHOD FOR DRIVING THE SAME

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a liquid crystal display, and in particular, to improve the common voltage compensation supply structure of a liquid crystal panel, thereby improving the input / output pin structure of a driving integrated circuit and further improving image display image quality. It relates to a driving method.

A liquid crystal display device displays an image using electrical and optical characteristics of a liquid crystal. Liquid crystals can have different anisotropic properties depending on the molecular axis and the direction of the short axis, such as refractive index and dielectric constant, and can easily control the molecular arrangement and optical properties. A liquid crystal display device using the same displays an image by changing the alignment direction of liquid crystal molecules according to the electric field size and adjusting the light transmittance transmitted through the polarizing plate.

The liquid crystal display device includes a liquid crystal panel in which a plurality of pixels are arranged in a matrix form, a gate driver for driving gate lines of the liquid crystal panel, and a data driver for driving the data lines of the liquid crystal panel.

In the liquid crystal display, inversion driving methods such as a frame inversion system, a line inversion system, and a dot inversion system are used to drive the pixels of the liquid crystal panel. . Among the inversion driving methods, the frame and line inversion methods can further reduce power consumption compared with the dot inversion method. In the case of the dot inversion method, an image of higher quality than the frame and line inversion methods can be obtained. To provide.

Recently, the line inversion or frame inversion method is applied, but the common voltage (Vcom) level supplied to each pixel of the liquid crystal panel is also swinged by the line inversion or frame inversion method, thereby reducing power consumption and image quality. It also improved. In particular, the LCD panel is divided into a plurality of blocks to swing the common voltage to each block in order to prevent display defects due to the horizontal crosstalk phenomenon occurring when the common voltage swing is supplied.

However, there is a problem in that the supply structure, that is, the compensation supply structure of the common voltage level is too complicated to swing supply the common voltage Vcom for each of the plurality of blocks. In other words, in order to compensate and supply a common voltage level for each block, each block had to be equipped with a common voltage supply line and a feedback line. Therefore, the structure of supplying the common voltage becomes complicated, and in particular, the number of input / output pins of the driving integrated circuit supplying the common voltage increases, thereby inevitably reducing the pin spacing or the pin area.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and improves the common voltage compensation supply structure of the liquid crystal panel, thereby improving the input / output pin structure of the driving integrated circuit and further improving the image display image quality. And its driving method.

The driving apparatus of the liquid crystal display according to the exemplary embodiment of the present invention for achieving the above object includes a pixel area receiving first or second common voltages in units of odd and even horizontal lines, respectively, Or a liquid crystal panel in which a plurality of blocks each receiving a second common voltage in common are divided; And receive common first and second feedback common voltages from a plurality of adjacent block units among the plurality of blocks, respectively, to compensate the first and second common voltage levels, respectively, and compensate for the compensated first and second common values. And a common voltage supply unit for supplying a voltage to each of the blocks individually.

The first common voltage supply lines and the second common voltage supply lines of each block of the liquid crystal panel are commonly supplied with the first common voltage or the second common voltage supplied to each block, and are formed of a plurality of blocks adjacent to each other. The first common voltage supply lines are first feedback lines respectively provided to share a plurality of blocks adjacent to each other, and output the first feedback common voltage to the common voltage supply unit in common, and supply the second common voltage of the plurality of blocks adjacent to each other. The lines may be configured to output the second feedback common voltage to the common voltage supply unit as second feedback lines respectively provided to be shared by a plurality of adjacent blocks.

The common voltage supply unit receives the first and second feedback common voltages from the first and second feedback lines, respectively, and converts the first and second feedback common voltage levels into the first and second common voltage levels. And a plurality of common voltage compensators formed corresponding to each of the plurality of blocks to compensate for each of the plurality of blocks to supply the compensated first and second common voltages to the first and second common voltage supply lines, respectively. .

Each common voltage compensator receives first feedback common voltages of blocks corresponding to the corresponding block and compensates the first common voltage level, and supplies the first feedback voltages to the first common voltage supply lines of the corresponding blocks. An amplifier and a second feedback amplifier configured to receive the second feedback common voltage of a block adjacent to each of the corresponding blocks and to compensate for the second common voltage level, and supply the second feedback voltage to the second common voltage supply lines of the corresponding block, respectively. It is characterized by one.

The common voltage supply unit is configured to be embedded in a data integrated circuit driving data lines of the liquid crystal panel, and the first and second compensation voltages compensate for the number of terminals of the data integrated circuit to which the first and second feedback voltages are respectively input. At least one half of the number of the output terminals for outputting the second common voltage is characterized in that.

In addition, the driving method of the liquid crystal display according to the embodiment of the present invention for achieving the above object comprises a pixel region which is supplied with the first or second common voltage in units of odd and even horizontal lines, respectively, A driving method of a liquid crystal display device having a liquid crystal panel in which a plurality of blocks each having a common supply of the first or second common voltages are divided are provided. Receiving first and second feedback common voltages, respectively, and compensating to the first and second common voltage levels, respectively; and separately supplying the compensated first and second common voltages to the respective blocks. It features.

The first common voltage supply lines and the second common voltage supply lines of each block of the liquid crystal panel are commonly supplied with the first common voltage or the second common voltage supplied to each block, and are formed of a plurality of blocks adjacent to each other. The first common voltage supply lines commonly output the first feedback common voltage to first feedback lines respectively provided to be shared by a plurality of blocks adjacent to each other, and the second common voltage supply lines of the plurality of blocks adjacent to each other are adjacent to each other. The second feedback common voltage may be commonly output to a second feedback line provided to be shared by a plurality of blocks.

The compensated first and second common voltage supplying steps may include the first and second feedback common voltages from the respective first and second feedback lines using a plurality of common voltage compensators formed corresponding to each of the plurality of blocks. Compensating the first and second feedback common voltage levels with the first and second common voltage levels, respectively; And supplying each of the compensated first and second common voltages to the first and second common voltage supply lines.

The first and second common voltage level compensation steps may include receiving the first feedback common voltage of the block and the adjacent block, respectively, by using a first feedback amplifier to compensate for the first common voltage level, respectively. Supplying to the first common voltage supply lines and receiving the second feedback common voltage of a block and an adjacent block, respectively, by using a second feedback amplifier and compensating for the second common voltage level, respectively. And supplying to the second common voltage supply lines.

The driving apparatus and driving method thereof of the liquid crystal display according to the exemplary embodiment of the present disclosure having various technical features as described above may improve the input / output pin structure of the driving integrated circuit by improving the common voltage compensation supply structure. In particular, the number of input pins can be reduced to increase the overall pin area, and the design and attachment structure of the driving integrated circuit can be improved. In addition, by compensating for the common voltage level and swing-supplying a plurality of blocks, horizontal crosstalk failure may be prevented to further improve display quality of an image.

1 is a block diagram schematically illustrating a driving device of a liquid crystal display according to an exemplary embodiment of the present invention.
2 is a waveform diagram illustrating a swing supply method of first and second common voltages according to an exemplary embodiment of the present invention.
FIG. 3 is a circuit diagram illustrating the liquid crystal panel and the common voltage supply unit of FIG. 1 in detail. FIG.
4 is a circuit diagram illustrating another configuration of the liquid crystal panel and the common voltage supply unit of FIG. 3 in detail.
5 is a view showing another common voltage supply structure of the liquid crystal panel shown in FIG.

Hereinafter, a driving apparatus and a driving method of a liquid crystal display according to an embodiment of the present invention will be described in detail with reference to the accompanying drawings.

1 is a block diagram schematically illustrating a driving device of a liquid crystal display according to an exemplary embodiment of the present invention.

The driving apparatus of the liquid crystal display shown in FIG. 1 includes pixel regions supplied with the first or second common voltages Vcom1 and Vcom2 in units of odd and even horizontal lines, respectively, and includes a first or second common voltage ( A liquid crystal panel 2 in which a plurality of blocks each receiving Vcom1 and Vcom2 in common are divided; A gate driver 6 driving the gate lines GL1 to GLn of the liquid crystal panel 2; A data driver 4 driving the data lines DL1 to DLm of the liquid crystal panel 2; The common first and second feedback common voltages are supplied from a plurality of adjacent block units, respectively, and compensated to the first and second common voltage levels, respectively, and the compensated first and second common voltages are individually supplied to the respective blocks. A common voltage supply unit 7; A timing controller 8 for aligning and supplying image data input from the outside to the data driver 4 and controlling the common voltage supply unit 7 and the gate and the data drivers 6 and 4, respectively.

The liquid crystal panel 2 includes a thin film transistor (TFT) and a TFT formed in each pixel region defined by odd and even gate lines GL1 through GLn and a plurality of data lines DL1 through DLm. And a liquid crystal capacitor Clc connected thereto. The liquid crystal capacitor Clc is composed of a pixel electrode connected to the TFT, and a common electrode facing the pixel electrode and the liquid crystal. At this time, the common line is connected to the pixel areas of the odd-numbered line to supply the first common voltage Vcom1 to each common electrode, and the second common voltage Vcom2 to each common electrode to the pixel areas of the even-numbered line. The common line is connected to supply). The TFT supplies the image signals from the respective data lines DL1 to DLm to the pixel electrodes in response to the scan pulses from the respective gate lines GL1 to GLn. The liquid crystal capacitor Clc charges the difference voltage between the image signal supplied to the pixel electrode and the first or second common voltages Vcom1 and Vcom2 supplied to the common electrode, and varies the arrangement of liquid crystal molecules according to the difference voltage. By adjusting the light transmittance, gray scales are realized. In this case, the storage capacitor Cst may be formed by overlapping the pixel electrode with the storage line and the insulating layer interposed therebetween.

In the liquid crystal panel 2, a plurality of blocks are divided according to regions in which the first or second common voltages Vcom1 and Vcom2 are commonly supplied. In other words, each of the first and second common voltages Vcom1 and Vcom2 is supplied to each block separated in the liquid crystal panel 2, so that odd-numbered and even-numbered common lines for each block are commonly shared with the first or second common lines. The voltages Vcom1 and Vcom2 are supplied. On the other hand, the feedback lines FB1 to FBn to which the first and second common voltages Vcom1 and Vcom2 of each block are fed back are provided for each block so that a plurality of adjacent blocks are shared. Accordingly, each of the first and second common voltages Vcom1 and Vcom2 of the plurality of blocks adjacent to each other are fed back through common feedback lines FB1 to FBn that are shared with each other. This common voltage supply and feedback structure will be described in more detail with reference to the accompanying drawings.

The data driver 4 includes a plurality of data integrated circuits 4a provided between one side of the liquid crystal panel 2 and at least one source printed circuit board 3 to drive the data lines DL1 to DLm, respectively. 4b). Here, each of the plurality of data integrated circuits 4a and 4b is mounted on the data circuit film 5 and connected between the liquid crystal panel 2 and any one source printed circuit board 3.

Each of the data integrated circuits 4a and 4b includes a data control signal DCS from the timing controller 8, for example, a source start signal SSP, a source shift clock SSC, The data output from the timing controller 8 is converted into an analog voltage, that is, an image signal, using a source output enable (SOE) signal, an inversion signal (Pol signal), or the like. Specifically, the data driver 4 latches the data Data aligned through the timing controller 8 according to the SSC, and then scan pulses are supplied to the gate lines GL1 to GLn in response to the SOE signal. Each horizontal line is supplied with one horizontal line of video signal to each of the data lines DL1 through DLm. At this time, the data driver 4 selects the gamma voltage of the positive or negative polarity corresponding to the gray value of the aligned data Data according to the inversion signal from the timing controller 8 and converts the selected gamma voltage into an image signal. Supply to each data line DL1 to DLm.

The gate driver 6 may be formed on one side of the non-image display area 2b of the liquid crystal panel 2 or may be provided in an integrated circuit form and separately provided on one side of the liquid crystal panel 2. The gate driver 6 sequentially drives the gate lines GL1 to GLn according to the gate control signal GCS from the timing controller 8. Specifically, the gate driver 4 may include a gate control signal GCS from the timing controller 8, for example, a gate start signal GSP, a gate shift clock GSC, and a gate output. Scan pulses or gate low voltages are sequentially supplied to the gate lines GL1 to GLn by using a gate output enable (GOE) signal.

The common voltage supplying unit 7 may include the first common voltage Vcom1 supplied to the pixel areas of the odd-numbered line and the second common voltage supplied to the pixel areas of the even-numbered line according to the control from the timing controller 8. The levels of Vcom2) are supplied by inverting each other in every frame period or in units of the first and second periods of each frame period. In other words, as shown in FIG. 2, the common voltage supplying unit 7 inverts the level of the first common voltage Vcom1 and the second common voltage Vcom2 in every frame unit (N frame) or divides the level. It may be supplied by inverting the driving period of each block. For example, the common voltage supplying unit 7 supplies the first common voltage Vcom1 at a positive 5V voltage (+) level in one frame period NFrame under the control of the timing controller 8. 2 The common voltage Vcom2 can be supplied by being converted to a negative 0V voltage level. On the contrary, in the next frame period (N + 1 Frame), the first common voltage Vcom1 is supplied at a negative 0V voltage (−) level, and the second common voltage Vcom2 is supplied at a positive 5V voltage level (+). Can be converted into supply.

At this time, the common voltage supplying unit 7 receives the first and second feedback common voltages through the feedback lines FB1 to FBn formed in units of a plurality of blocks adjacent to each other, respectively, and adjusts the levels of the first and second feedback common voltages. Reward each. Each of the compensated voltages is separately supplied to the respective blocks as the first and second common voltages Vcom1 and Vcom2.

The timing controller 8 may be provided on a separate control printed circuit board, or may be provided on any one of the at least one source printed circuit board 3 to provide image data RGB and a plurality of synchronization signals DCLK and Hsync from the outside. The common voltage supply unit 7, the data integrated circuits 4a and 4b and the gate driver 6 are controlled according to Vsync and DE.

Specifically, the timing controller 8 arranges the image data RGB input from the outside to be suitable for driving the liquid crystal panel 2 and supplies the image data RGB to the data driver 4. The gate and data control signals GCS and DCS are obtained by using at least one of a synchronization signal input from an external device, that is, a dot clock DCLK, a data enable signal DE, and horizontal and vertical synchronization signals Hsync and Vsync. And supply it to the gate and data integrated circuits 6, 4a, 4b, respectively. On the other hand, the timing controller 8 supplies an inversion signal (Pol signal) or the like to the common voltage supply unit 7, and the common voltage supply unit 7 is supplied to the odd and even numbered common lines as shown in FIG. The first common voltage Vcom1 and the second common voltage Vcom2 are inverted to be supplied.

FIG. 3 is a circuit diagram illustrating the liquid crystal panel and the common voltage supply unit of FIG. 1 in detail.

The first common voltage Vcom1 supply lines and the second common voltage Vcom2 supply lines for each block 1DM to 4DM of the liquid crystal panel 2 shown in FIG. 3 are supplied for each block 1DM to 4DM. The first common voltage Vcom1 supply lines of the first common voltage Vcom1 or the second common voltage Vcom2 are commonly supplied, and the first common voltage Vcom1 supply lines of the plurality of blocks 1DM to 4DM adjacent to each other are shared by a plurality of blocks adjacent to each other. The first feedback common voltage FVcom1 is commonly output to the provided first feedback line FB1, and the second common voltage Vcom2 supply lines of the plurality of blocks 1DM to 4DM that are adjacent to each other are connected to each other. The second feedback common voltage FVcom2 is commonly output to the second feedback lines provided to be shared.

Each block (1DM to 4DM) divided in the image display area 2a of the liquid crystal panel 2 is divided according to an area receiving the first and second common voltages Vcom1 and Vcom2 as one common input line, respectively. In other words, each of the first and second common voltages Vcom1 and Vcom2 from the common voltage supply unit 7 is supplied to each of the blocks 1DM to 4DM separated by the liquid crystal panel 2. Thus, each block is provided. Common lines arranged at odd or even numbers of (1DM to 4DM) are commonly supplied with the first or second common voltages Vcom1 and Vcom2.

On the other hand, the first and second feedback lines FB1 to FBn, to which the first and second common voltages Vcom1 and Vcom2 of the blocks 1DM to 4DM are fed back, are divided by blocks so that a plurality of adjacent blocks are shared. It is provided. For example, as illustrated in FIG. 3, one first feedback line FB1 through which the first common voltage Vcom1 is fed back is formed in the first and second blocks 1DM and 2DM adjacent to each other, thereby forming one first feedback line. The first feedback common voltage FVcom1 may be commonly output through FB1. The second feedback line to which the second common voltage Vcom2 is fed back is also formed in the first and second blocks 1DM and 2DM adjacent to each other so that the second feedback common voltage FVcom2 is common through one second feedback line. It can be output as In this way, the first feedback line FB1 or the second feedback common voltage FVcom2 to which the first feedback common voltage FVcom1 is commonly output may be divided into a plurality of adjacent blocks 1DM to 4DM. It can be formed to share. In this case, the number of the first feedback line FB1 or the second feedback line is reduced by at least 1/2 the number of the first common voltage Vcom1 input line or the second common voltage Vcom2 input line.

The common voltage supply unit 7 shown in FIG. 3 has the first and second feedback common voltages from each of the first and second feedback lines FB1 to FBn formed to be shared by a plurality of adjacent blocks 1DM to 4DM. FVcom1 and FVcom2 are supplied to compensate the first and second feedback common voltages FVcom1 and FVcom2 to the first and second common voltages Vcom1 and Vcom2, respectively, and are compensated for the first and second common voltages. A plurality of common voltage compensators 7a to 7d formed corresponding to each of the plurality of blocks 1DM to 4DM to supply each of the Vcom1 and Vcom2 to the first and second common voltage Vcom1 and Vcom2 supply lines. do.

As shown in FIG. 3, the common voltage supply unit 7 may be separately configured in the image non-display area 2b of the liquid crystal panel 2 or may be embedded in the data integrated circuits 4a and 4b although not shown. . In particular, when the data integrated circuits 4a and 4b are configured to be embedded, the first and second common voltages Vcom1 and Vcom2 compensate for the number of terminals to which the first and second feedback voltages FVcom1 and FVcom2 are respectively input. It can be reduced by at least 1/2 the number of output terminals.

Each common voltage compensator 7a to 7d receives the first feedback common voltage FVcom1 of the corresponding block and the adjacent block, respectively, and compensates to the first common voltage Vcom1 level to compensate for the first common voltage of the corresponding block. The first feedback amplifier 9 supplies the supply lines Vcom1 and the second feedback common voltage FVcom2 of the block adjacent to the corresponding block, respectively, to compensate for the second common voltage Vcom2. The second feedback amplifier 10 supplies the second common voltage Vcom2 supply lines of the corresponding blocks, respectively.

Each of the first and second feedback amplifiers 9 and 10 includes at least one operational amplifier OP-Amp formed between a positive and a negative voltage source. The first and second feedback amplifiers 9 and 10 compare the first or second feedback common voltages FVcom1 and FVcom2 of the adjacent blocks with the levels of the first and second common voltages Vcom1 and Vcom2. Compensates by amplifying the first and second common voltages Vcom1 and Vcom2. Each of the compensated first and second common voltages Vcom1 and Vcom2 is supplied to the first and second common voltages Vcom1 and Vcom2 supply lines of the corresponding block, respectively.

4 is another circuit diagram illustrating the liquid crystal panel and the common voltage supply unit of FIG. 3 in detail.

The common voltage supply unit 7 illustrated in FIG. 4 is provided on both sides of the liquid crystal panel 2, and each of the first and second feedback lines FB1 to FBn formed to share a plurality of adjacent blocks 1DM to 4DM. ) Are supplied with first and second feedback common voltages FVcom1 and FVcom2, respectively. Compensating the first and second feedback common voltages FVcom1 and FVcom2 to the first and second common voltages Vcom1 and Vcom2, respectively, and compensate each of the compensated first and second common voltages Vcom1 and Vcom2. Supply to the first and second common voltage (Vcom1, Vcom2) supply line of each block. To this end, each common voltage compensator 7a to 7d is provided to correspond to both of the blocks 1DM to 4DM, respectively, and the first and second feedback lines FB1 to FBn and the first and second common. Both voltages Vcom1 and Vcom2 will be shared. In the case of FIG. 4, the compensating effect of the first and second common voltages Vcom1 and Vcom2 may be further increased than the common voltage compensation structure of FIG. 3.

FIG. 5 is a diagram illustrating another common voltage supply structure of the liquid crystal panel shown in FIG. 1.

As illustrated in FIG. 5, the common electrode may be formed on the liquid crystal panel 2 to cover all pixel regions for each of the blocks 1DM to 4DM. In this case, the storage capacitor Cst of the pixel regions is formed by overlapping the pixel electrode with the gate line and the insulating layer interposed therebetween, so that each of the liquid crystals is driven in a twisted nematic (TN) mode.

The common electrodes formed for each of the plurality of blocks 1DM to 4DM receive the common voltage Vcom supplied to each of the blocks 1DM to 4DM, and feed back to the feedback lines provided to be shared by the plurality of adjacent blocks 1DM to 4DM. Common voltage FVcom is output in common. In other words, as shown in FIG. 2, the common voltage supplying unit 7 inverts the levels of the first common voltage Vcom1 and the second common voltage Vcom2 in every frame unit (N frame). It can be inverted and supplied in units of driving periods of blocks.

The common voltage supply unit 7 receives a feedback common voltage from a feedback line formed to be shared by a plurality of adjacent blocks 1DM to 4DM, and compensates the level of the feedback common voltage to the common voltage level, respectively. The compensated common voltage Vcom is supplied to each block common voltage Vcom supply line.

As described above, the common voltage supply unit 7 according to the exemplary embodiment of the present invention may be separately configured in the image non-display area 2b of the liquid crystal panel 2, and although not shown, the data integrated circuit 4a, It may be built in 4b). In particular, when the data integrated circuits 4a and 4b are configured to be embedded, the first and second common voltages Vcom1 and Vcom2 compensate for the number of terminals to which the first and second feedback voltages FVcom1 and FVcom2 are respectively input. It can be reduced by at least 1/2 the number of output terminals.

Therefore, the driving device and the driving method thereof of the liquid crystal display according to the exemplary embodiment of the present invention can improve the input / output pin structure of the driving integrated circuit by improving the common voltage compensation supply structure. In particular, the number of input pins can be reduced to increase the overall pin area, and the design and attachment structure of the driving integrated circuit can be improved. In addition, by compensating for the common voltage level and swing-supplying a plurality of blocks, horizontal crosstalk failure may be prevented to further improve display quality of an image.

It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit or scope of the invention. Therefore, the technical scope of the present invention should not be limited to the contents described in the detailed description of the specification, but should be defined by the claims.

Claims (10)

A liquid crystal panel including pixel regions receiving first or second common voltages in odd and even horizontal lines, respectively, and a plurality of blocks each of which is commonly supplied with the first or second common voltages; ; And
The common first and second feedback common voltages are respectively supplied from a plurality of adjacent block units among the plurality of blocks, and compensated to the first and second common voltage levels, respectively, and the compensated first and second common voltages are respectively provided. And a common voltage supply unit for supplying to the respective blocks individually. The method of claim 1,
The first common voltage supply lines and the second common voltage supply lines for each block of the liquid crystal panel are commonly supplied with the first common voltage or the second common voltage supplied for each block.
The first common voltage supply lines of a plurality of blocks adjacent to each other are first feedback lines respectively provided to be shared by a plurality of blocks adjacent to each other, and output the first feedback common voltage to the common voltage supply unit in common.
The second common voltage supply lines of the plurality of blocks adjacent to each other may output the second feedback common voltage to the common voltage supply as a second feedback line respectively provided to share the plurality of blocks adjacent to each other. Driving device of liquid crystal display device. The method of claim 2,
The common voltage supply unit
Receiving the first and second feedback common voltages from the first and second feedback lines, respectively, to compensate the first and second feedback common voltage levels to the first and second common voltage levels, respectively,
And a plurality of common voltage compensators formed corresponding to each of the plurality of blocks to supply the compensated first and second common voltages to the first and second common voltage supply lines, respectively. Drive system. The method of claim 3, wherein
Each common voltage compensator
A first feedback amplifier configured to receive the first feedback common voltages of blocks corresponding to each of the blocks corresponding to each other and to compensate for the first common voltage level, and supply the first feedback voltages to the first common voltage supply lines of the corresponding blocks;
And a second feedback amplifier configured to receive the second feedback common voltages of blocks corresponding to each of the blocks corresponding to each other and to compensate for the second common voltage level, and supply the second feedback voltages to the second common voltage supply lines of the corresponding blocks. A drive device for a liquid crystal display device. The method of claim 4, wherein
The common voltage supply unit
And a number of terminals of the data integrated circuit to which the first and second feedback voltages are input, respectively, to be compensated for the first and second common voltages. And at least one-half less than the number of output terminals to output. A liquid crystal panel having pixel regions receiving first or second common voltages in odd and even horizontal lines, respectively, and having a plurality of blocks each having the first or second common voltages in common; In the driving method of the liquid crystal display device provided with,
The common first and second feedback common voltages are respectively supplied from a plurality of adjacent block units among the plurality of blocks, and compensated to the first and second common voltage levels, respectively, and the compensated first and second common voltages are respectively provided. And supplying to the respective blocks separately. The method according to claim 6,
The first common voltage supply lines and the second common voltage supply lines for each block of the liquid crystal panel are commonly supplied with the first common voltage or the second common voltage supplied for each block.
The first common voltage supply lines of a plurality of blocks adjacent to each other commonly output the first feedback common voltage to a first feedback line provided to be shared by a plurality of blocks adjacent to each other.
The second common voltage supply lines of the plurality of blocks adjacent to each other may output the second feedback common voltage to a second feedback line provided to be shared by the plurality of blocks adjacent to each other. Way. The method of claim 7, wherein
The compensated first and second common voltage supplying steps
The first and second feedback common voltages are respectively supplied from the first and second feedback lines by using a plurality of common voltage compensators formed corresponding to the plurality of blocks, respectively. Compensating a level with the first and second common voltage levels, respectively; And
And supplying each of the compensated first and second common voltages to the first and second common voltage supply lines. The method of claim 8,
The first and second common voltage level compensation step
Receiving a first feedback common voltage of a block corresponding to each block and a block adjacent to each other using a first feedback amplifier, and compensating for the first common voltage level to supply first common voltage supply lines of a corresponding block to each other; And
Receiving a second feedback common voltage of a corresponding block and a block adjacent to each other using a second feedback amplifier to compensate for the second common voltage level and supplying the second common voltage supply lines to the corresponding common block; Method of driving a liquid crystal display device comprising a. The method of claim 9,
The plurality of common voltage compensators are built in a data integrated circuit driving data lines of the liquid crystal panel.
Characterized in that the number of terminals of the data integrated circuit to which the first and second feedback voltages are respectively input is at least 1/2 less than the number of output terminals outputting the compensated first and second common voltages. A method of driving a liquid crystal display device.

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