KR20080084152A - Driving apparatus of liquid crystal display panel and driving method thereof - Google Patents

Abstract

A driver of an LCD device and a driving method thereof are provided to reduce a load of the driver by omitting operation and calculation processes of a shift register, a D/A(Digital to Analog) converter, and an output buffer. A driver of an LCD(Liquid Crystal Display) device includes a display panel and a drive IC(Integrated Circuit). The display panel includes a display unit for displaying images. The drive IC compares two frame image data and varies supply period of image signals supplied to the display unit according to the comparison result. The drive IC mounted on the display panel includes gate and data drivers(60,50), a voltage generator, and a timing controller(70). The gate driver applies driving signals to gate lines of the display panel. The data driver supplies image data to data lines of the display panel. The voltage generator supplies driving voltages to the display panel and the drivers. The timing controller controls the gate and data drivers and the voltage generator.

Description

Driving apparatus for a liquid crystal display panel and a driving method thereof

1 is a view showing a liquid crystal display device including a driving device according to an embodiment of the present invention.

2 is a view illustrating a driving device of a liquid crystal display panel according to an exemplary embodiment of the present invention.

3 is a view showing a data driving circuit unit of a driving apparatus according to an embodiment of the present invention.

4 is a view showing a comparator of a driving apparatus according to an embodiment of the present invention.

5 is a flowchart illustrating a method of driving a driving apparatus according to an exemplary embodiment of the present invention.

<Explanation of symbols for main parts of the drawings>

10 liquid crystal display device 20 liquid crystal panel

22: upper substrate 24: lower substrate

30: drive device 40: graphics memory

50: data driver circuit 52: shift register

54: digital / analog converter 56: output buffer

60: gate driving circuit portion 70: timing controller

80: comparator 82: image data discriminator

84: discrimination signal generator

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a driving apparatus for a liquid crystal display panel and a driving method thereof, and more particularly, to a driving apparatus for a liquid crystal display panel and a driving method thereof capable of reducing power consumption.

In recent information society, display devices are more important than ever as visual information transmission media, and many kinds of flat panel displays have been developed.

The flat panel display device includes a liquid crystal display (LCD), a field emission display (FED), a plasma display panel (PDP), and an electroluminescence (EL). .

In general, the liquid crystal display device has a trend that the application range is gradually widened due to the characteristics such as light weight, thin, low power consumption. In line with this trend, liquid crystal displays are being used as portable computers such as notebook PCs, office automation equipment, audio / video equipment, and indoor / outdoor advertising display devices. It is developing rapidly.

Typically, a liquid crystal display device displays an image by adjusting light transmittance of liquid crystal cells according to a video signal. Such a liquid crystal display device includes a liquid crystal panel (LCD) in which liquid crystal cells are arranged in a matrix form between two glass substrates to display an image, and a back light unit that irradiates light to the liquid crystal panel. And a driving device for applying a driving signal for driving the liquid crystal panel.

BACKGROUND ART Liquid crystal displays are widely used in small devices such as notebook PCs, personal wireless communication devices, and portable multimedia devices, and large screen devices such as large screen TVs and indoor / outdoor advertising display devices. In such a liquid crystal display, low cost, high display quality, and low power consumption are important.

As the screen size of the LCD increases, the power consumption also increases in proportion to the size of the LCD. Therefore, there is a need for a method of reducing the high power consumption. In particular, recently, in the case of a portable liquid crystal display device, users are carrying it for a long time, and thus, the necessity of maximizing the use time of the battery is minimized by minimizing power consumption for a long time operation.

Accordingly, an object of the present invention is to provide a driving apparatus for a liquid crystal display panel and a driving method thereof which can reduce power consumption.

In order to achieve the above object, an apparatus for driving a liquid crystal display panel according to an exemplary embodiment of the present invention compares a display panel including a display unit for displaying an image with at least two frame image data and supplies the display unit according to a comparison result. And a driving integrated circuit for varying a supply period of the video signal.

A driving method of a driving apparatus for a liquid crystal display panel according to an exemplary embodiment of the present invention includes a display panel including a display unit for displaying an image, a gate driving circuit unit, a data driving circuit unit, a voltage generator, and a timing controller. A driving method for driving a display panel having a driving integrated circuit mounted therein, the method comprising: comparing at least two frame image data and varying a supply period of an image signal supplied to the display unit according to a comparison result; It is done.

Other objects and features of the present invention in addition to the above object will be apparent from the description of the embodiments with reference to the accompanying drawings.

Hereinafter, exemplary embodiments of the present invention will be described with reference to the accompanying drawings.

1 is a view showing a liquid crystal display including a driving device according to an embodiment of the present invention.

Referring to FIG. 1, in the liquid crystal display device 10 including the driving device 30 according to an exemplary embodiment of the present invention, liquid crystal cells are arranged in a matrix form between the upper substrate 22 and the lower substrate 24. A liquid crystal panel 20 for displaying an image, a backlight unit (not shown) for irradiating light to the liquid crystal panel 20, and a driving device 30 for applying a driving signal for driving the liquid crystal panel 20. do.

The liquid crystal panel 20 includes a spacer (not shown) for injecting liquid crystal between the upper substrate 22 and the lower substrate 24 to maintain a constant gap between the upper substrate and the lower substrate. The upper substrate 22 of the liquid crystal panel 20 is formed with a color filter, a common electrode, a black matrix, and the like, which are not shown. In addition, signal lines such as data lines DL1 to DLn and gate lines GL1 to GLn are formed on the lower substrate 24 of the liquid crystal panel 20, and data lines DL1 to DLn and gate lines GL1 to GLn are formed on the lower substrate 24. A thin film transistor (hereinafter referred to as "TFT") is formed at the intersection of GLn. The TFT supplies the analog video signal from the data lines DL1 to DLn to the liquid crystal cell in response to the scan signal (gate driving signal) from the gate lines GL1 to GLn.

Since the liquid crystal cell includes a common electrode facing each other with a liquid crystal interposed therebetween and a pixel electrode connected to the TFT, the liquid crystal cell may be equivalently represented as a liquid crystal capacitor Clc. The liquid crystal cell includes a storage capacity Cst for maintaining the analog video signal charged in the liquid crystal capacitor Clc until the next analog video signal is charged.

In the liquid crystal display, if the pixel voltage signal of the same polarity is continuously applied to the liquid crystal layer, the liquid crystal layer is deteriorated and the display quality of the screen is degraded. In order to prevent deterioration of the liquid crystal layer, a driving method of inverting the pixel voltage applied from the data line to the pixel electrode to be positive (+) or negative (-) with respect to the common voltage applied to the common electrode has been proposed.

Such polarity inversion driving methods include line inversion system, column inversion system, dot inversion system, and frame inversion system. Methods are used.

The line inversion driving method has a problem in that flicker such as a stripe pattern occurs between the horizontal lines due to the crosstalk between the horizontal pixel areas, and the column inversion driving method includes the crosstalk between the vertical pixel areas. As a result, a fricker phenomenon such as a stripe pattern occurs between vertical lines.

Accordingly, in order to solve the problems of the line inversion driving method and the column inversion driving method, a dot inversion driving method is proposed in which each pixel area and the adjacent pixel areas in the vertical and horizontal directions have different polarities. However, in the dot inversion driving method, the polarity of the pixel voltage signal applied to each pixel area through the data line in the data driver must be inverted every frame in the horizontal and vertical directions. The polarity fluctuation of the data signal applied to the pixel region is increased, resulting in an increase in power consumption.

The frame inversion driving method is driven by applying a signal having the same polarity to each pixel region of the liquid crystal panel during one frame and inverting the polarity of the signal applied to each pixel region during the previous frame during the next frame.

The frame inversion driving method has a small power consumption and prevents deterioration of the liquid crystal layer compared to the above-described line inversion driving method, column inversion driving method, and dot inversion driving method. Is being applied. The liquid crystal display device including the driving device 30 according to an exemplary embodiment of the present invention applies a frame inversion driving method.

2 is a view illustrating a driving device of a liquid crystal display panel according to an exemplary embodiment of the present invention.

Referring to FIG. 2, the driving device 30 of the liquid crystal display panel according to an exemplary embodiment of the present invention includes a gate driving circuit unit 60 sequentially supplying a gate driving signal to each of the gate lines GL1 to GLn, and an image. A data driving circuit unit 50 for supplying data R, G, and B to the data lines DL1 to DLn so as to be synchronized with the gate driving signal (scan signal), the data driving circuit unit 50, and the gate driving circuit unit 60. Timing controller 70 for controlling the driving of the drive; graphics memory 40 for sequentially storing image data sequentially input; and comparator 80 comparing the image data of the current frame to the image data of the previous frame. ) And a gamma voltage supply unit (not shown) for supplying a gamma reference voltage to the data driving circuit unit 50, a liquid crystal panel 20, a backlight unit (not shown), and a driving power supply to each component of the driving device 30. Voltage generator (not shown) It is configured to hereinafter.

The timing controller 70 uses the gate clock signal GCS and the data control signal DCS using a dot clock DLCK, a data enable signal DE, and horizontal and vertical synchronization signals Hsync and Vsync input from an external source. Is generated to control the driving timing of each of the data driving circuit unit 50 and the gate driving circuit unit 60.

The gate control signal GCS includes a gate start pulse GSP, a gate shift clock GSC, and a gate output enable GOE. The data control signal DCS includes a source start pulse (SSP), a source shift clock (SSC), a source output signal (SOE), and a polarity signal (POL). do.

In addition, the timing controller 70 controls the driving of the data driving circuit unit 50, the gate driving circuit unit 60, and the voltage generating unit according to the image data determination signal CP from the comparator 30 of the driving device 30. .

The timing controller 70 supplies a gate control signal GCS for controlling the driving timing of the gate driving circuit unit 60.

The gate driving circuit unit 60 includes a shift register that sequentially generates the gate driving signal in response to the gate control signal GCS from the timing controller 70. The gate driving circuit unit 60 sequentially applies the gate driving signals to the gate lines GL1 to GLn in response to the gate control signal GCS input from the timing controller 70. Turn on the TFT connected to GLn).

In response to the data control signal DCS supplied from the timing controller 70, the data driving circuit unit 50 converts the digital image data of the frame unit supplied from the graphic memory 40 into an analog video signal, and converts the gate line ( The analog video signal corresponding to the line is supplied to the data lines DL1 to DLn every cycle in which the gate driving signal is supplied to the GL1 to GLn. In this case, the data driving circuit unit 50 may invert the polarity of the analog video signals supplied to the data lines DL1 to DLn in response to the polarity control signal POL supplied from the timing controller 70.

The graphic memory 40 sequentially stores frame image data which is continuously input, and outputs the stored frame image data to the data driving circuit unit 50.

The comparator 80 compares the input image data of the current frame with the image data of the previous frame from the graphic memory 40. The comparator 80 generates a discrimination signal according to the comparison result described above, and outputs the generated discrimination signal to the timing controller 70.

The voltage generation unit (not shown) generates a voltage necessary for driving the liquid crystal panel 20 using the power supply voltage supplied from the outside and supplies the driving device 30 according to the control signal from the timing controller 70.

The voltage generator generates a plurality of gamma reference voltages to supply a gamma reference voltage to the data driver circuit 50, an inverter to supply a lamp driving voltage to the backlight unit, and a common electrode of the liquid crystal panel 20. It includes a common voltage generator for supplying a common voltage to.

The gamma voltage supply unit generates a plurality of gamma reference voltages using the supplied driving voltage, and supplies the generated gamma reference voltages to the data driving circuit unit 50.

The common voltage generator receives the high potential power voltage VDD to generate the common voltage Vcom and supplies the common voltage Vcom to the common electrodes of the liquid crystal cells Clc included in each pixel of the liquid crystal panel 20.

The inverter generates a lamp driving voltage corresponding to the dimming signal Dim supplied from the timing controller and supplies it to the backlight. Thus, the brightness of light irradiated from the backlight to the liquid crystal panel 20 is adjusted according to the dimming signal Dim. The backlight generates light corresponding to the lamp driving voltage supplied from the inverter and irradiates the liquid crystal panel 20.

3 is a view showing a data driving circuit unit of a driving apparatus according to an embodiment of the present invention, Figure 4 is a view showing a comparator of the driving apparatus according to an embodiment of the present invention.

As shown in FIG. 3, the data driving circuit unit 50 of the driving apparatus 30 according to an exemplary embodiment shifts image data RGB input from the graphic memory 40 shown in FIG. 2 in order. a shift register 52 for shifting and storing, a digital / analog converter 54 for converting input digital image data into an analog voltage value corresponding thereto, and a digital / An output buffer 56 for applying the voltage value of the analog image data converted by the analog converter 54 to the data lines DL1 to DLn of the liquid crystal panel 20 is provided.

The shift register 52 simultaneously receives and shifts the digital image data RGB by the horizontal synchronizing signal Star Horizintal in a clock CLK cycle. The shift register 52 outputs the sorted digital image data to the digital / analog converter 54.

The digital / analog converter 54 converts the digital image data into an analog voltage value corresponding to a data coding value and outputs the analog image data to the output buffer 56. In this case, the digital / analog converter 54 converts the digital image data into an analog voltage value corresponding to the gamma reference voltage input from the gamma voltage generator (not shown).

The output buffer 56 applies an analog voltage value of the image data input from the digital / analog converter 54 to each of the data lines DL1 to DLn of the liquid crystal panel 20, so that each data of the liquid crystal panel 20 is applied. The analog cells of the image data described above are charged to the pixel cells connected to the lines DL1 to DLn.

As shown in FIG. 4, the comparator 80 of the driving device 30 according to an exemplary embodiment of the present invention may include digital image data of a current frame input and digital image data of a previous frame input from the graphic memory 40. An image data discriminator 82 for discriminating whether or not the same image data is identical, a discrimination signal generator 84 for generating an image discrimination signal CP according to whether the image data discriminator 82 is discriminated, and an image data discriminator And an output terminal 86 for outputting the image data input from 82 and the discrimination signal CP input from the discrimination signal generator 84.

5, the driving method of the driving apparatus according to the embodiment of the present invention will be described.

When the image data of the current frame is input to the image data discriminator 82 (S110), the image data discriminator 82 reads image data of a previous frame stored in the graphic memory 40 (S120). Thereafter, image data of the current frame and image data of the previous frame are compared to determine whether the two image data are the same image data (S130).

In more detail, when the image data of the N-th frame is input to the image data discriminator 82, the image data of the previous frame, that is, the image data of the N-th frame, is read from the graphic memory 40. Thereafter, the image data of the N-th frame and the image data of the N-th frame are compared. The comparison of the image data of these two frames (N, N-1th frame) is to determine whether the image data of the two frames is the same image data.

If it is determined by the image data discriminator 82 whether the image data of the Nth frame and the image data of the N-1th frame are the same, the discrimination signal generator 84 determines whether the image data discriminator 82 is discriminated. Each determination signal CP is generated (S140), and the generated determination signal CP is output to the timing controller 70 via the output terminal 86.

In addition, the image data discriminator 82 outputs the image data of the N-th frame to the graphic memory 40 via the output terminal 86 (S150). The graphic memory 40 sequentially stores the image data input from the image data discriminator 82.

The discrimination signal generator 84 generates the first discrimination signal CP "0" when the image data of the Nth frame and the image data of the N-1th frame are not the same image data. The determination signal CP is input to the timing controller 70 via the output terminal 86.

The timing controller 70 determines that the image data of the N-th frame and the image data of the N-th frame are not the same image data by the image data discriminator 82, and then outputs an output terminal 86 from the discrimination signal generator 84. When the first determination signal CP “0” is input through the data driver circuit unit 50, the gate driver circuit unit 60, and the voltage generator (not shown) of the driving device 30 are frame inversion driving methods. To suit your needs.

The graphic memory 40 outputs the image data of the received N-th frame to the shift register 52 of the data driving circuit unit 50.

The shift register 52 simultaneously receives and aligns R, G, and B digital image data by a horizontal synchronization signal. Thereafter, the sorted digital image data is output to the digital / analog converter 54.

The digital / analog converter 54 converts the digital image data input from the shift register 52 into voltage values of analog image data corresponding thereto (S160). As shown in FIG. 3, the digital-to-analog converter 54 converts the digital image data into analog image data corresponding to the digital image data using the reference gamma voltages GAM0 to GAMn input from the gamma voltage generator (not shown). Convert to voltage value of. Thereafter, the voltage value of the converted analog image data is output to the output buffer 56.

The output buffer 56 applies an analog voltage value of the image data input from the digital / analog converter 54 to each data line DL1 to DLn of the liquid crystal panel 20 (S170). When the analog voltage value is applied to the data lines DL1 to DLn, the analog voltage is charged to the pixel cells turned on by the gate driving signal from the gate driving circuit unit 60.

On the other hand, when the discrimination signal generator 84 determines that the image data of the Nth frame and the image data of the N-1th frame are the same image data, the discrimination signal generator 84 determines the N-1th frame from the graphic memory 40. The image data of the previous frame of the image data, that is, the image data of the N-2 th frame is read (S120).

Thereafter, the image data of the N-th frame and the image data of the N-th frame are compared. The comparison of the image data of the two frames (N, N-2 frames) is to determine whether the image data of the three frames (N, N-1, N-2 frames) are the same image data.

As described above, comparing image data of three frames (N, N-1, and N-2 frames) may be generated when image data having the same polarity is input to the liquid crystal cell in three or more consecutive frames. This is to prevent panel deterioration and display quality deterioration.

When the image data discriminator 82 determines whether the image data of the Nth frame and the image data of the N-2nd frame are the same, the discrimination signal generator 84 determines whether the image data discriminator 82 is discriminated. Each determination signal CP is generated (S140), and the generated determination signal CP is output to the timing controller 70 via the output terminal 86.

In addition, the image data discriminator 82 outputs the image data of the N-th frame to the graphic memory 40 via the output terminal 86. The graphic memory 40 sequentially stores the image data input from the image data discriminator 82.

The discrimination signal generator 84 determines that the image data of the Nth frame and the image data of the N-2th frame are not the same image data, that is, the Nth frame image data and the N-1th frame image data are the same. The second discrimination signal "1" is generated when the image data of two frames (N, N-1th frame) and the N-2nd frame are not identical. The second determination signal CP “1” is input to the timing controller 70 via the output terminal 86.

The timing controller 70 determines that the image data of the Nth frame and the image data of the N-2th frame are not the same by the image data discriminator 82, and determines the second from the discrimination signal generator 84. When the signal CP “1” is input, the data driving circuit unit 50, the gate driving circuit unit 60, and the voltage generator (not shown) of the driving device 30 are controlled to match the two frame inversion driving method ( S180).

The two-frame inversion driving method refers to a driving method of applying image data having the same polarity to the liquid crystal cell during two frame periods and then inverting the polarity of the image data applied to the liquid crystal cell during two frame periods. The 2 frame inversion driving method is applied to maintain the same image data applied to the liquid crystal cell in the N-th frame period in the N-th frame period.

When the determination signal CP "1" is input, the timing controller 70 controls the data driving circuit unit 50, the gate driving circuit unit 60, and the voltage generator to match the two-frame inversion driving method. The image data applied to the liquid crystal cell in the first frame period is kept the same during the Nth frame period (S190).

On the other hand, when the discrimination signal generator 84 determines that the image data of the Nth frame and the image data of the N-2nd frame are the same image data, that is, the Nth frame image data, the N-1th frame image data, and N When the second frame image data is all determined to be the same image data, the first determination signal CP "0" is generated. The first determination signal CP "0" is input to the timing controller 70 via the output terminal 86.

In addition, the image data discriminator 82 outputs the image data of the N-th frame to the graphic memory 40 via the output terminal 86. The graphic memory 40 sequentially stores the image data input from the image data discriminator 82.

The timing controller 70 determines the image data of three consecutive frames (N, N-1, and N-2th frames) by the image data discriminator 82 as the same image data, and the discrimination signal generator 84. When the first determination signal CP “0” is input from the controller, the data driving circuit unit 50, the gate driving circuit unit 60, and the voltage generator of the driving device 30 are controlled in accordance with the frame inversion driving method (S180). .

The graphic memory 40 outputs the image data of the received N-th frame to the shift register 52 of the data driving circuit unit 50. The shift register 52 simultaneously receives and aligns R, G, and B digital image data by a horizontal synchronization signal. Thereafter, the sorted digital image data is output to the digital / analog converter 54.

The digital / analog converter 54 converts the digital image data input from the shift register 52 into voltage values of analog image data corresponding thereto. As shown in FIG. 3, the digital-to-analog converter 54 converts the digital image data into analog image data corresponding to the digital image data using the reference gamma voltages GAM0 to GAMn input from the gamma voltage generator (not shown). Convert to voltage value of. Thereafter, the voltage value of the converted analog image data is output to the output buffer 56.

The output buffer 56 applies an analog voltage value of the image data input from the digital / analog converter 54 to each data line DL1 to DLn of the liquid crystal panel 20 (S170). When the analog voltage value is applied to the data lines DL1 to DLn, the analog voltage is charged to the pixel cells turned on by the gate driving signal from the gate driving circuit unit 60.

The shift register 52, the digital / analog converter 54, and the output buffer of the data driving circuit unit 50 when the same image data is input during two frame periods through the driving device and the driving method according to the embodiment of the present invention. In operation 56, an operation and a process of performing an operation that should be performed every frame period may be omitted. By omitting the operation and the calculation process, the load of the driving device 30 can be reduced and the power consumption of the liquid crystal display can be reduced.

In addition, when the image data of three frames continuously input is the same image data, the polarity of the analog image data applied to the liquid crystal cell is inverted every two frame periods, thereby having the same polarity in three or more consecutive frame periods. It is possible to prevent deterioration of the liquid crystal panel and deterioration of display quality, which may occur when image data is input to the liquid crystal cell.

The driving method of the driving apparatus of the liquid crystal display panel according to the embodiment of the present invention described above is described as being driven by the frame in-jeon driving method and the two-frame inversion driving method. Not only the version driving method but also the conventional dot inversion driving method and the horizontal line / vertical line inversion driving method can be applied.

The driving device and the driving method according to the embodiment of the present invention described above include not only a driving circuit including a data driving circuit part, a gate driving circuit part, and a timing controller in one integrated circuit, but also a data driving circuit part, a gate driving circuit part, and a timing controller. The same may be applied to a driving device that is separated and constitutes each integrated circuit.

Those skilled in the art will appreciate that various changes and modifications can be made without departing from the technical spirit of the present 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.

As described above, the driving apparatus and the driving method thereof according to an embodiment of the present invention compare the image data of the input frame with the image data of previous frames to determine whether they are the same, and control the driving apparatus according to the determination result. . Through such a driving device and a driving method, an operation and a process of performing a shift register, a digital / analog converter, and an output buffer, which should be performed every frame period in the driving device, can be omitted. By omitting the operation and the calculation process, the load of the driving device can be reduced and the power consumption of the liquid crystal display can be reduced.

Also, when the image data is the same image data in three or more consecutive frames, the polarity of the image data applied to the liquid crystal cell is inverted every two frame periods so that the image data having the same polarity is input in successive frames. In this case, it is possible to prevent degradation of the liquid crystal panel and deterioration of display quality, which may occur.

Claims (25)

A display panel including a display unit for displaying an image, and And a driving integrated circuit for comparing at least two frame image data and varying a supply period of an image signal supplied to the display unit according to a comparison result. The method of claim 1, And the driving integrated circuit is mounted on the display panel. The method of claim 2, The driving integrated circuit may include a gate driving circuit unit for applying a driving signal to a gate line of the liquid crystal panel; A data driver circuit for supplying image data to a data line of the liquid crystal panel; A voltage generator supplying a driving voltage to the liquid crystal panel and each driver; And a timing controller for controlling the gate driving circuit part, the data driving circuit part, and the voltage generating part. The method of claim 3, wherein The data driving circuit unit sequentially stores image data in units of frames input; A shift register for sorting and outputting the image data according to an input synchronization signal; A digital / analog converter that converts the input image data into an analog voltage value and outputs it; An output buffer for outputting the input analog voltage value to the data line; And a comparator for comparing input frame image data with image data of a previous frame stored in the graphic memory. The method of claim 4, wherein The comparator is a discriminator for determining whether or not the input image data of the N-th frame and the image data of the N-1 th frame stored in the graphics memory; And a discrimination signal generator for generating a discrimination signal in accordance with the discrimination of the discriminator. The method of claim 5, wherein In the case where the video data of the N-th frame and the video data of the N-th frame are determined to be unequal, And the determination signal generator generates a first determination signal and outputs the first determination signal to the timing controller. The method of claim 6, And the timing controller controls the gate driving circuit part, the data driving circuit part and the voltage generator to be driven in a frame inversion driving method when the first determination signal is input. The method of claim 5, wherein In the case where the image data of the N-th frame and the image data of the N-th frame are determined to be the same image data, And the determination signal generator determines whether the image data of the N-2th frame and the image data of the Nth frame to be input are the same. The method of claim 8, In the case where the image data of the N-th frame and the image data of the N-th frame are determined to be unequal image data, And the determination signal generator generates a second determination signal and outputs the second determination signal to the timing controller. The method of claim 9, The timing controller may include the gate driver circuit part, the data driver circuit part, and the voltage generator to maintain image data input to the liquid crystal cell in the N-1th frame period during the Nth frame period when the second determination signal is input. A drive device for a liquid crystal display panel, characterized in that the control. The method of claim 10, And the timing controller controls the gate driving circuit part, the data driving circuit part and the voltage generator to be driven in a two-frame inversion driving method. The method of claim 11, And the timing controller controls the data driver circuit to omit the operation and operation of the shift register, the digital / analog converter and the output buffer corresponding to the Nth frame period. The method of claim 8, In the case where the image data of the N-th frame and the image data of the N-th frame are determined to be the same image data, And the determination signal generator generates a first determination signal and outputs the first determination signal to the timing controller. The method of claim 13, And the timing controller controls the gate driving circuit part, the data driving circuit part and the voltage generator to be driven in a frame inversion driving method when the first determination signal is input. A display panel including a display unit for displaying an image, and a driving integrated circuit mounted on the display panel, including a gate driving circuit unit, a data driving circuit unit, a voltage generator, and a timing controller, to drive the display panel. In the driving method, And comparing at least two frame image data and varying a supply period of an image signal supplied to the display unit according to the comparison result. The method of claim 15, A first step of determining whether the input N-th frame image data and the N-1th frame image data are the same; A second step of generating a determination signal through the determination signal generator according to the determination of the first step; A third step of outputting the determination signal generated in the second step to the timing controller; And a fourth step of controlling driving of the gate driving circuit part, the data driving circuit part, and the voltage generating part in accordance with the determination signal. The method of claim 16, In the first step In the case where the image data of the N-th frame and the image data of the N-th frame are determined to be unequal image data, Generating a first discrimination signal through a discrimination signal generator mounted in the driving integrated circuit, and outputting the first discrimination signal to the timing controller. . The method of claim 15, The timing controller includes controlling the gate driving circuit part, the data driving circuit part and the voltage generating part to be driven by a frame inversion driving method when the first determination signal is input. Driving method of drive device. The method of claim 18, When the image data of the N-th frame and the image data of the N-th frame are determined to be the same image data in the first step, And determining whether the image data of the N-th frame and the image data of the N-th frame are the same. The method of claim 19, When the image data of the N-2th frame and the image data of the Nth frame are determined to be unequal image data, Generating a second discrimination signal; And outputting the second determination signal to the timing controller. The method of claim 20, The timing controller generates the gate driving circuit part, the data driving circuit part, and the voltage so that the image data input to the liquid crystal cell in the N-1th frame period is maintained during the Nth frame period when the second determination signal is input. A driving method of a drive device for a liquid crystal display panel, characterized in that the unit is controlled. The method of claim 21, And the timing controller controls the gate driving circuit part, the data driving circuit part and the voltage generator to be driven in a two-frame inversion driving method. The method of claim 18, And the timing controller controls the data driver circuit to omit the operation and operation of the shift register, the digital / analog converter, and the output buffer corresponding to the Nth frame period. The method of claim 23, In the case where the image data of the N-2th frame and the image data of the Nth frame are determined to be the same image data, Generating a first discrimination signal; And outputting the first determination signal to the timing controller. The method of claim 24, And the timing controller controls the gate driving circuit part, the data driving circuit part and the voltage generator to be driven in a frame inversion driving method when the first determination signal is input.

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