KR100514259B1 - Apparatus and Method of Driving Plasma Display Panel - Google Patents

Abstract

The present invention relates to a driving apparatus of a plasma display panel which can improve the gradation display ability and improve the image quality.

A driving apparatus of the plasma display panel according to the present invention includes: a selection unit for receiving and receiving odd data and storm water data from the outside; An inverse gamma adjustment block for inverse gamma correction of odd data and even data supplied from a selection unit using a plurality of gamma tables; And a mux block including a first mux for outputting inverse gamma corrected radix data in a first order and a second mux for outputting inverse gamma corrected even data in a second order different from the first order. .

Description

Apparatus and Method of Driving Plasma Display Panel

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a driving apparatus and method for a plasma display panel, and more particularly, to a driving apparatus and a method for driving a plasma display panel to improve the gray scale display ability and to improve image quality.

The plasma display panel (hereinafter referred to as "PDP") displays an image using visible light generated from the phosphor when ultraviolet light generated by gas discharge excites the phosphor. The PDP is thinner and lighter than the cathode ray tube (CRT), which has been mainly used for display means, and has the advantage of enabling high definition / large screen.

1 and 2, the three-electrode AC surface discharge type PDP includes scan electrodes Y1 to Yn and sustain electrodes Z formed on the upper substrate 10, and addresses formed on the lower substrate 18. Electrodes X1 to Xm are provided.

The discharge cells 1 of the PDP are formed at the intersections of the scan electrodes Y1 to Yn, the sustain electrodes Z, and the address electrodes X1 to Xm.

Each of the scan electrodes Y1 to Yn and the sustain electrode Z includes a transparent electrode 12 and a metal bus electrode 11 having a line width smaller than that of the transparent electrode 12 and formed at one edge of the transparent electrode. The transparent electrode 12 is typically formed on the upper substrate 10 by indium tin oxide (ITO). The metal bus electrode 11 is formed of a metal on the transparent electrode 12 to reduce the voltage drop caused by the transparent electrode 12 having a high resistance. The upper dielectric layer 13 and the passivation layer 14 are stacked on the upper substrate 10 on which the scan electrodes Y1 to Yn and the sustain electrode Z are formed. On the upper dielectric layer 13, wall charges generated during plasma discharge are accumulated. The passivation layer 14 protects the electrodes Y1 to Yn and Z and the upper dielectric layer 13 from sputtering generated during plasma discharge and increases the emission efficiency of secondary electrons. As the protective film 14, magnesium oxide (MgO) is usually used.

The address electrodes X1 to Xm are formed on the lower substrate 18 in a direction crossing the scan electrodes Y1 to Yn and the sustain electrode Z. FIG. The lower dielectric layer 17 and the partition wall 15 are formed on the lower substrate 18. The phosphor layer 16 is formed on the surfaces of the lower dielectric layer 17 and the partition wall 15. The partition wall 15 is formed in a stripe or lattice shape to physically divide the discharge cells to block electrical and optical interference between neighboring discharge cells 1. The phosphor layer 16 is excited and emitted by ultraviolet rays generated during plasma discharge to generate visible light of any one of red, green, and blue.

An inert mixed gas such as He + Xe, Ne + Xe or He + Ne + Xe for discharging is injected into the discharge space of the discharge cells provided between the upper and lower substrates 10 and 18 and the partition wall 15.

The PDP is time-division-driven by dividing one frame into several subfields having different emission counts in order to realize gray levels of an image. Each subfield is divided into a reset period for uniformly generating a discharge, an address period for selecting a discharge cell, and a sustain period for implementing gray levels according to the number of discharges. For example, when the image is to be displayed with 256 gray levels, the frame period (16.67 ms) corresponding to 1/60 second is divided into eight subfields. In addition, each of the eight subfields is divided into a reset period, an address period, and a sustain period. Here, the reset period and the address period of each subfield are the same for each subfield, while the sustain period and the number of discharges thereof are 2 ⁿ (n = 0,1,2,3) in each subfield in proportion to the number of sustain pulses. , 4,5,6,7). As described above, since the sustain period is changed in each subfield, gray levels of an image can be realized.

3 is a view showing a driving apparatus of a conventional plasma display panel.

Referring to FIG. 3, a conventional PDP driving apparatus includes a gain adjusting unit 32, an error diffusion unit 33, and a subfield mapping unit 34 connected between an inverse gamma adjusting unit 31 and a data alignment unit 35. And an APL calculator 36 connected between the inverse gamma adjustment unit 31 and the waveform generator 37.

The inverse gamma adjusting unit 31 linearly converts the luminance of the gray level of the image signal by using the 2.2 gamma table of the digital video data RGB from the input line 30.

The gain adjusting unit 32 compensates the color temperature by adjusting the effective gain for each data of red, green, and blue.

The error diffusion unit 33 finely adjusts the gray scale value by diffusing the quantization error of the digital video data RGB input from the gain adjusting unit 32 to adjacent cells.

The subfield mapping unit 34 maps the data input from the error diffusion unit 33 to the subfield pattern stored in advance for each bit, and supplies the mapping data to the data alignment unit 35.

The data aligning unit 35 supplies digital video data input from the subfield mapping unit 34 to the data driving circuit of the panel 38. The data driving circuit is connected to the address electrodes of the panel 38 to latch the data inputted from the data alignment unit 35 by one horizontal line, and then the latched data is addressed to the panel 38 by one horizontal period. Will be supplied to

The APL calculator 36 calculates an average luminance, that is, an APL (Avarage Picture Level), in one screen unit with respect to the digital video data RGB input from the inverse gamma adjustment unit 31, and the number of sustain pulses corresponding to the calculated APL. Will print the information.

The waveform generator 37 generates a timing control signal in response to the sustain pulse number information from the APL calculator 36, and supplies the timing control signal to a scan driving circuit and a sustain driving circuit (not shown). The scan driving circuit and the sustain driving circuit supply sustain pulses to the scan electrodes and the sustain electrodes of the panel 38 during the sustain period in response to the timing control signal input from the waveform generator 37.

In such a conventional PDP, gray scales are expressed using subfields included in one frame, and thus there is a limit in gray scale expression capability. In addition, when gray scales are expressed using only subfields, pseudo contour noise is generated in the panel 38. Therefore, in the related art, the gray scale expressing ability is improved by using an error diffusion method for diffusing an error with a constant weight to adjacent pixels. However, such an error diffusion method has a problem in that an error diffusion pattern is generated because an error diffusion coefficient (that is, a weight) is set to be constant.

In addition, the conventional PDP inversely gamma corrects the input data by using a 2.2 gamma value. However, when inverse gamma correction of input data using a 2.2 gamma value does not linearly increase a gray value at a specific gray level, a problem arises in that image quality deteriorates.

Accordingly, an object of the present invention is to provide an apparatus and method for driving a plasma display panel that can improve gray scale display ability and improve image quality.

In order to achieve the above object, a driving apparatus of a plasma display panel of the present invention includes: a selection unit for receiving and receiving odd data and storm water data from the outside; An inverse gamma adjustment block for inverse gamma correction of odd data and even data supplied from a selection unit using a plurality of gamma tables; And a mux block including a first mux for outputting inverse gamma corrected radix data in a first order and a second mux for outputting inverse gamma corrected even data in a second order different from the first order. .

The selector controls the odd data to be output from the first mux and the even data to be output from the second mux.

The first mux outputs any one of a plurality of inverse gamma corrected odd data supplied from an inverse gamma adjustment block while being controlled by a pixel clock, a horizontal synchronization signal, and a vertical synchronization signal.

The second mux outputs any one of a plurality of inverse gamma corrected good data supplied from an inverse gamma adjustment block while being controlled by a pixel clock, a horizontal synchronization signal, and a vertical synchronization signal.

The inverse gamma adjustment block includes at least two inverse gamma adjustment units having different gamma tables for inverse gamma correction of odd data and even data.

One inverse gamma adjustment unit included in the inverse gamma adjustment block inversely gamma corrects odd and even data using a 2.2 gamma table.

The other inverse gamma adjusting units except for the inverse gamma adjusting unit having the 2.2 gamma table perform inverse gamma correction on the odd and even data using the modified gamma table in which the 2.2 gamma table is changed.

The modified gamma table is generated by adding or subtracting a constant value to the 2.2 gamma table.

The modified gamma table is generated by multiplying or dividing a 2.2 gamma table with a predetermined value.

The modified gamma table is generated by shifting the output gray value of the 2.2 gamma table.

The modified gamma table is generated by changing a value of a partial region of the 2.2 gamma table.

The modified gamma table is generated by changing the value of the entire region of the 2.2 gamma table.

A method of driving a plasma display panel according to the present invention includes a first step of providing a 2.2 gamma table and at least one modified gamma table having a gamma value different from that of the 2.2 gamma table; A second step of inverse gamma correction using at least one modified gamma table, a third step of outputting any one of 2.2 gamma tables and odd data corrected by at least one modified gamma table, and 2.2 gamma And a fourth step of outputting any one of the excellent data inversely gamma corrected by the table and the at least one modified gamma table, wherein the odd-corrected odd data in the third step is output in a first order, and The inverse gamma corrected even data in the step is output in a second order different from the first order.

In the third step, the odd data is output in the first order using a pixel clock, a horizontal synchronization signal, and a vertical synchronization signal input from the outside.

In the fourth step, even data is output in the second order by using a pixel clock, a horizontal synchronization signal, and a vertical synchronization signal input from the outside.

Other objects and features of the present invention in addition to the above objects will become 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 FIGS. 4 to 8.

4 is a view showing a driving device of a PDP according to an embodiment of the present invention.

4, in the embodiment of the present invention, the driving apparatus of the PDP includes a selector 50, an inverse gamma adjustment block 52 and a mux block 54, a mux block 54 and a panel 68. APL calculation connected between the gain adjusting unit 56, the error diffusion unit 58, the subfield mapping unit 60, and the data alignment unit 62 connected between the MIX block 54 and the panel 68. A unit 64 and a waveform generator 66 are provided.

The selector 50 controls the mux block 54 in response to odd data and even data input from the outside. The inverse gamma adjustment block 52 inverse gamma corrects the odd and even data input from the selection unit 50. The mux block 54 outputs any one of a plurality of odd-numbered odd numbers and even data (odd, even) corrected from the inverse gamma adjustment block 52. Here, the mux block 54 outputs the inverse gamma corrected odd data odd and the inverse gamma corrected even data even while controlling in different ways. Detailed operation of the selection unit 50, the inverse gamma adjustment block 52 and the mux block 54 will be described later.

The gain adjusting unit 56 compensates the color temperature by adjusting the effective gain for each data of red, green, and blue that are output by inverse gamma correction.

The error diffusion unit 58 finely adjusts the gray level value by diffusing the quantization error of the inverse gamma corrected data input from the gain adjustment unit 56 to adjacent cells.

The subfield mapping unit 60 maps the data input from the error diffusion unit 58 to the pre-stored subfield pattern for each bit and supplies the mapping data to the data alignment unit 62.

The data alignment unit 62 supplies the data input from the subfield mapping unit 60 to the data driving circuit of the panel 68. The data driving circuit is connected to the address electrodes of the panel 68 to latch the data inputted from the data alignment unit 62 by one horizontal line, and then the latched data of the address electrodes of the panel 68 in units of one horizontal period. To feed.

The APL calculator 64 calculates an average luminance, that is, APL, in one screen unit with respect to the data RGB that is inversely gamma corrected and outputs the sustain pulse number information corresponding to the calculated APL.

The waveform generator 66 generates a timing control signal in response to the sustain pulse number information from the APL calculator 64, and supplies the timing control signal to a scan driving circuit and a sustain driving circuit (not shown). The scan driving circuit and the sustain driving circuit supply a sustain pulse to the scan electrodes and the sustain electrodes of the panel 68 during the sustain period in response to the timing control signal input from the waveform generator 66.

In the present invention as described above, the detailed operation process of the selection unit 50, the inverse gamma adjustment block 52 and the mux block 54 is as follows. First, the selector 50 relays the odd data and the even data inputted to the inverse gamma adjustment block 52 and the mux block corresponding to the input data (odd or even). 54). Here, the selector 50 causes the inverse gamma corrected odd data odd to be output from the first mux 54A and the inverse gamma corrected even data even from the second mux 54B.

The inverse gamma adjustment block 52 performs inverse gamma correction on the odd and even data (odd, even) input from the selection unit 50 using a plurality of inverse gamma tables. In other words, the inverse gamma adjustment block 52 performs inverse gamma correction on the odd and even data (odd, even) input from the selection unit 50 using a plurality of gamma values, and thus the odd and even data (odd, even) a plurality of inverse gamma corrected output data is generated corresponding to each.

To this end, the inverse gamma adjustment block 52 includes at least two inverse gamma adjustment units, for example four inverse gamma adjustment units 52A, 52B, 52C, and 52D. The first inverse gamma adjustment unit 52A inversely gamma corrects data (odd, even) input to the self using a 2.2 gamma table as in the related art.

The second inverse gamma adjustment unit 52B inversely gamma corrects the input data odd and even by using a gamma table different from the first inverse gamma adjustment unit 52A. The third inverse gamma adjustment unit 52C inversely gamma corrects the input data odd and even by using a gamma table different from the first and second inverse gamma adjustment units 52A and 52B. The fourth inverse gamma adjustment unit 52D performs inverse gamma correction on the input data by using a gamma table different from the first to third inverse gamma adjustment units 52A to 52C.

Thus, each of the odd and even data (odd, even) input from the selection unit 50 to the inverse gamma adjustment block 52 is corrected to four gamma values and input to the mux block 54 at four gray levels. Here, one of the plurality of inverse gamma adjustment units 52A to 52D included in the inverse gamma adjustment block 52 has a 2.2 gamma table, and the remaining inverse gamma adjustment units 52B to 52D 2.2 Gamma tables have different gamma tables.

For example, the second inverse gamma adjusting unit 52B inversely gamma corrects the input data odd and even using a 2.3 gamma table, and the third inverse gamma adjusting unit 52C uses the 2.4 gamma table to input the input data ( odd, even). In addition, the fourth inverse gamma correction unit 52D performs inverse gamma adjustment on the input data odd and even using the 2.5 gamma table.

In the present invention, the gamma tables of the second to fourth inverse gamma adjustment units 52B to 52D may be generated by modifying the 2.2 gamma table in various forms. For example, the second to fourth inverse gamma adjustment units 52B to 52D may be generated by adding or subtracting a predetermined value to the 2.2 gamma table as shown in FIG. 5. have. That is, the gamma table of the second inverse gamma adjustment unit 52B is generated by adding a value of 0.1 to the 2.2 gamma table. The gamma table of the third inverse gamma adjustment unit 52C is generated by adding a value of 0.01 to the 2.2 gamma table. In addition, the gamma table of the fourth inverse gamma adjustment unit 52D is generated by adding a value of 0.2 to the 2.2 gamma table. Here, when the gamma table is generated by adding a constant value to the 2.2 gamma table, as shown in FIG. In other words, in the 2.2 gamma table, a gray level of "0" to "5" input from the outside outputs a gray level value of "0". However, when a gamma table is generated by applying a constant value to the 2.2 gamma table, a predetermined gray level value is output even in low gray levels, thereby improving the expressability of low gray levels.

In addition, the gamma tables of the second to fourth inverse gamma adjusting units 52B to 52D may be generated by shifting the 2.2 gamma table up and down as shown in FIG. 6. For example, the gamma table of the second inverse gamma adjustment unit 52B is generated by shifting the 2.2 gamma table up by three gradations. The gamma table of the third inverse gamma adjustment unit 52C is generated by shifting the 2.2 gamma table up by six gradations. In addition, the gamma table of the fourth inverse gamma adjustment unit 52D is generated by shifting the 2.2 gamma table up by four gradations. Here, when the gamma table is generated by shifting the 2.2 gamma table, as shown in FIG. 6, the gray scale representation ability is improved.

In addition, the gamma tables of the second to fourth inverse gamma adjusting units 52B to 52D may be generated by changing some gray levels of the 2.2 gamma table as shown in FIG. 7. For example, the gamma tables of the second to fourth inverse gamma adjustment units 52B to 52D may be generated by changing a low gray scale region (for example, 16 gray scales or less) of the 2.2 gamma table.

In practice, in the present invention, the gamma tables of the second to fourth inverse gamma adjustment units 52B to 52D are generated by various methods. For example, the gamma tables of the second to fourth inverse gamma adjustment units 52B to 52D may be generated by multiplying or dividing a 2.2 gamma table by a predetermined value. The gamma tables of the second to fourth inverse gamma adjustment units 52B to 52D may be generated by mixing the methods of FIGS. 5 and 7. In other words, the inverse gamma table of the second inverse gamma adjustment unit 52B is generated by adding or subtracting a predetermined value to the 2.2 gamma table, and the third inverse gamma adjustment unit 52C generates the inverse gamma table in a portion of the 2.2 gamma table. Can be created by changing. In addition, the inverse gamma table of the fourth inverse gamma adjustment unit 52D may be generated by shifting the 2.2 gamma table. In fact, in the present invention, the gamma table of the second to fourth inverse gamma adjustment units 52B to 52D is determined to be a value at which an optimal image is experimentally displayed.

The mux block 54 is controlled by the selector 50 to output data of any one of the inverse gamma corrected data input from the first to fourth inverse gamma adjustment units 52A to 52D. To this end, the mux block 54 has a first mux 54A and a second mux 54B.

The first mux 54A outputs odd gamma corrected odd data under the control of the selector 50. Then, the second mux 54B outputs the inverse gamma corrected even data odd under the control of the selector 50. Here, the first mux 54A and the second mux 54B receive the pixel clock P, the horizontal synchronization signal H, and the vertical synchronization signal V from the outside.

The first mux 54A outputs odd data supplied to the first mux 54A using a pixel clock P, a horizontal synchronization signal H, and a vertical synchronization signal V in a specific manner. The second mux 54B is different from the first mux 54A by using the pixel clock P, the horizontal synchronizing signal H, and the vertical synchronizing signal V for the even data supplied to the second mux 54B. Output in (or order).

For example, while the first mux 54A controls the odd data odd in the pixel clock P, A (output data of the first inverse gamma adjustment unit), B (output data of the second inverse gamma adjustment unit), C (Output data of the third inverse gamma adjustment unit) and D (output data of the fourth inverse gamma adjustment unit) are output, and the odd-odd corrected odd data (odd) is output, and when the horizontal synchronization signal (H) is inputted, D, C Inverse gamma-corrected odd data may be output in the order of, B, and A. FIG. In addition, after the vertical synchronization signal (V) is input, the first mux (54A) is controlled to the pixel clock (P) and outputs the odd-odd corrected odd data (odd) in the order of A, A, B, B, When the horizontal synchronizing signal H is inputted, the reverse gamma corrected odd data can be output in the order of B, B, A, and A. (After this, the same process is repeated.)

In addition, the second mux 54B outputs the even data evenly inversely gamma corrected in the order of D, C, B, and A while the even data are controlled in the pixel clock P, and the horizontal synchronization signal ( If H) is input, the even-data corrected by inverse gamma correction in order of A, B, C, and D may be output. In addition, after the vertical synchronization signal (V) is input, the second mux (54B) is controlled to the pixel clock (P) and outputs the inverse gamma-corrected even data (even) in the order of C, C, D, D, When the horizontal synchronization signal H is input, the inverse gamma corrected even data (even) can be output in the order of D, D, C, and C. (After this, the same process is repeated).

Then, as shown in FIG. 8, the panel 38 includes odd data output from the first mux 54A and even data output from the second mux 54B in the i (i is a natural number) frame. even) are combined and A, D, B, C, C, B, D, and A are supplied with inverse gamma corrected data, and after the horizontal synchronization signal H is input, D, A, C, B, B Inverse gamma corrected data is supplied in the order of C, A, and D. After the vertical synchronizing signal V is input, the panel 38 is supplied with inverse gamma corrected data in the order of A, C, A, C, B, D, B, D, and the horizontal synchronizing signal H. After inputting, the reverse gamma corrected data is supplied in the order of B, D, B, D, A, C, A, and C. (After this, repeat the same process)

That is, in the present invention, since the data corrected with different gamma values are supplied to the panel 68 by the first mux 54A and the second mux 54B, the gray scale can be expanded on the average. In other words, since only the image corresponding to the inverse gamma corrected data using the 2.2 gamma table is conventionally displayed, the gradation that can be expressed is limited. However, in the present invention, various gray levels can be displayed on average since an image is displayed by using inverse gamma corrected data using at least two different gamma tables.

In addition, in the present invention, the error diffusion error may be prevented by using the odd and even data corrected by various gamma values so that the error diffusion error may be prevented. In other words, the error diffusion error is generated by constantly repeating the error diffusion coefficient. However, in the present invention, since inverse gamma correction data is output by different gamma tables in pixel, line, and frame units, a difference in gray values is generated in pixel units, and accordingly, an error diffusion coefficient having a constant weight is used. The error diffusion error does not occur even if the error diffusion.

In addition, in the present invention, the odd-odd corrected odd data and even data even with two muxes 54A and 54B are output by different methods (order). Therefore, when the inverse gamma corrected odd data and even data are supplied to the panel 68, the odd data and even data may be supplied in various forms as shown in FIG. As a result, the gradation expression ability is improved. In fact, outputting the inverse gamma corrected data using one mux limits the method that can be supplied to the panel 68, thereby limiting the gradation expression capability.

As described above, according to the driving apparatus and method of the plasma display panel according to the present invention, inverse gamma correction is performed using at least two inverse gamma correction units, and the inverse gamma corrected data is converted into a pixel clock, a vertical synchronization signal, and a horizontal synchronization. By alternately outputting the signals corresponding to the signals, the expressive power of the gray scales can be extended. As such, when the expressive power of the gray scale is expanded, error diffusion patterns and pseudo contour noise may be reduced, thereby improving image quality. In particular, the present invention can further expand the expressive power of gray scales by outputting radix data and even data in different orders using two muxes.

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.

1 is a plan view schematically showing a conventional plasma display panel.

2 is a perspective view showing in detail the structure of the cell shown in FIG.

3 is a block diagram showing a driving apparatus of a conventional plasma display panel.

4 is a block diagram showing a driving apparatus of a plasma display panel according to an embodiment of the present invention;

FIG. 5 illustrates a first embodiment of an inverse gamma table stored in the inverse gamma adjustment units shown in FIG. 4; FIG.

FIG. 6 is a diagram illustrating a second embodiment of an inverse gamma table stored in the inverse gamma adjusting units shown in FIG. 4; FIG.

FIG. 7 illustrates a third embodiment of an inverse gamma table stored in the inverse gamma adjustment units shown in FIG. 4; FIG.

FIG. 8 is a diagram illustrating inverse gamma corrected data output by control of a mux unit shown in FIG. 4. FIG.

<Description of Symbols for Main Parts of Drawings>

1: discharge cell 10: upper substrate

11 bus electrode 12 transparent electrode

13,17 dielectric layer 14 protective film

15 bulkhead 16: phosphor layer

18: lower substrate 30: input line

31,52A, 52B, 52C, 52D: Reverse Gamma Adjustment

32,56: gain adjustment part 33,58: error diffusion part

34,60: subfield mapping unit 35,62: data alignment unit

36,64: APL calculator 37,66: waveform generator

38,68: Panel 50: Selection

52: reverse gamma adjustment block 54: mux block

54A, 54B: Mux

Claims (15)

A selection unit for receiving and relaying odd data and storm water data from the outside; An inverse gamma adjustment block for inverse gamma correction of odd data and even data supplied from the selection unit using a plurality of gamma tables; A mux block including a first mux for outputting the inverse gamma corrected radix data in a first order and a second mux for outputting the inverse gamma corrected evenness data in a second order different from the first order; And a plasma display panel drive device. The method of claim 1, And the selector controls the odd data to be output from the first mux and the even data to be output from the second mux. The method of claim 1, The first mux outputs any one of a plurality of inverse gamma corrected odd data supplied from the inverse gamma adjustment block while being controlled by a pixel clock, a horizontal synchronization signal, and a vertical synchronization signal. drive. The method of claim 3, wherein The second mux outputs any one of a plurality of inverse gamma corrected excellent data supplied from the inverse gamma adjustment block while being controlled by the pixel clock, the horizontal synchronization signal, and the vertical synchronization signal. Driving device. The method of claim 1, The inverse gamma adjustment block And at least two inverse gamma adjustment units having different gamma tables for inverse gamma correction of the odd data and the even data. The method of claim 5, And an inverse gamma adjustment unit included in the inverse gamma adjustment block to inverse gamma correct the odd and even data using a 2.2 gamma table. The method of claim 6, The inverse gamma adjustment units other than the inverse gamma adjustment unit having the 2.2 gamma table are inversely gamma corrected for the odd and even data using the modified gamma table which has changed the 2.2 gamma table. The method of claim 7, wherein And the modified gamma table is generated by adding or subtracting a predetermined value to the 2.2 gamma table. The method of claim 7, wherein And the modified gamma table is generated by multiplying or dividing the 2.2 gamma table by a predetermined value. The method of claim 7, wherein And the modified gamma table is generated by shifting the output gray level of the 2.2 gamma table. The method according to any one of claims 8 to 10, And the modified gamma table is generated by changing a value of a portion of the 2.2 gamma table. The method according to any one of claims 8 to 10, And the modified gamma table is generated by changing a value of the entire region of the 2.2 gamma table. A first step of providing a 2.2 gamma table and at least one modified gamma table having a different gamma value than the 2.2 gamma table; A second step of performing inverse gamma correction on the odd data and the even data input from the outside using the 2.2 gamma table and the at least one modified gamma table; Outputting any one of said odd data corrected by said 2.2 gamma table and said at least one modified gamma table; A fourth step of outputting any one of the even data corrected by inverse gamma correction by the 2.2 gamma table and the at least one modified gamma table, The inverse gamma corrected odd data is output in a first order in the third step, and the inverse gamma corrected excellent data is output in a second order different from the first order in the fourth step. How to drive the display panel. The method of claim 13, And in the third step, outputting the odd data in the first order using a pixel clock, a horizontal synchronization signal, and a vertical synchronization signal input from the outside. The method of claim 14, And in the fourth step, outputting the even data in the second order using a pixel clock, a horizontal synchronization signal, and a vertical synchronization signal input from the outside.