KR100649573B1 - Display panel Driver, method for driving display panel - Google Patents

Abstract

The present invention relates to a driver for a display panel and a method of driving the same. The present invention relates to accurate display of gray scales regardless of display characteristics of a panel, and to a corresponding proportional frame even when different manufacturers use different frame frequencies. Gray is represented according to a frequency. For this, according to a predetermined scan pulse width setting command inputted from the outside, one of a plurality of preset scan pulse width setting reference information is selected to correspond to the pulse of a predetermined scan signal. After setting the width, among the data pulse width setting reference information preset for each data line within a predetermined scan section determined by the pulse width information set as such, the setting is selected by an external data pulse width setting command. Set the pulse width information of the predetermined data line to correspond to the reference information In the following, a scan drive signal and data line drive signal set for each of the pulse width information by modulating a pulse width to drive the scan lines and data lines of the display panel.

Display, panel, driven, driver, grey, pulse, width

Description

Display driver and method for driving the display panel {Display panel Driver, method for driving display panel}

1 is a view showing a first embodiment of a display panel driver according to the present invention;

2 is a view showing a second embodiment of a display panel driving driver according to the present invention;

3 and 4 show timing diagrams used in the present invention;

5 is a diagram illustrating a display panel driving method according to the present invention.

Explanation of symbols on the main parts of the drawings

100: scan pulse width setting means 101: scan pulse width setting manager

102: scan pulse width setting reference information storage unit 103: scan pulse width information setting unit

110: scan line driver 111: scan pulse width adjusting unit

112: scan driver output unit 120: data pulse width setting means

121: Data pulse width setting reference information storage unit

130: data line driver 131: data line pulse width control unit

132: video information storage unit

According to the present invention, gray scales can be accurately adjusted regardless of the display characteristics of the panel, and the gray scales can be expressed according to the corresponding frame frequencies even if different manufacturers use different frame frequencies. A drive driver for a panel and a method thereof.

Recently, in designing a driver IC for driving an OLED (Organic Light Emission Diode), which stands out as a unit element of a display panel in the field of flat panel display (FPD), a controller or a data driver A driver, a scan driver, a memory, an oscillator, and the like are manufactured in one chip.

In such a driver IC, a predetermined frame frequency required for displaying a specific image is determined by an embedded oscillator. Therefore, in order to change the frame frequency, a passive element such as a resistor or a capacitor is used to design the oscillator. There is a problem that only one frame frequency can be used by changing the frequency by changing the value of the passive element by pulling it outside or using a predetermined oscillator.

In addition, the flat panel display uses a gray scale representation of the corresponding image information, typically using a pulse width modulation method, in which gray is expressed as a multiple of unit gray levels based on a plurality of gray levels. Therefore, when trying to display an arbitrary panel with the driver IC used, the display characteristics are different for each panel. Therefore, there is a problem that the gray to be expressed cannot be represented correctly in some cases. There is a problem that must be designed.

Accordingly, the present invention was developed to solve the above problems, and can be accurately represented by adjusting the gray scale regardless of the display characteristics of the panel, and also applicable to a certain proportional standard even if different manufacturers use different frame frequencies. SUMMARY OF THE INVENTION An object of the present invention is to provide a driver for a display panel and a method of driving the same for displaying gray in accordance with a frame frequency.

In accordance with this purpose, the present invention is intended to represent the gray by adjusting each grayscale to an arbitrary value through a register setting, and also to match the frame frequency on a constant proportional basis even if different manufacturers use different frame frequencies. In addition, we want to express gray and adjust gray scale exactly to the desired value even if the inherent characteristics of panels are different for each manufacturer.

To this end, according to a first embodiment of a driving driver of a display panel according to the present invention, one of a plurality of preset scan pulse width setting reference information is selected according to a predetermined scan pulse width setting command input from the outside. Scan pulse width setting means for setting a pulse width of a predetermined scan signal so as to correspond thereto; A scan line driver for sequentially driving a scan line of a corresponding display panel by pulse width modulating a scan driving signal differently according to the pulse width information set by the scan pulse width setting means; Within a predetermined scan section determined by the pulse width information set by the scan pulse width setting means, among data pulse width setting reference information preset for each data line, the data pulse width setting command is selected by an external data pulse width setting command. Data pulse width setting means for setting the pulse width information of the predetermined data line to correspond differently according to the setting reference information; And a data line driver for driving a corresponding data line of the display panel by pulse width modulating the data line driving signal according to the pulse width information set by the data pulse width setting means.

According to a second embodiment of a drive driver of a display panel according to the present invention, one of preset scan pulse width reference information is selected according to an external setting command, and the pulse width of the scan driving signal is set using the same. Scan and data pulse width setting composite means for setting pulse width information of a corresponding data line driving signal with reference to data pulse width reference information differently preset for each data line; A scan line driver for sequentially driving scan lines of the corresponding display panel by pulse width modulating the scan driving signal differently according to the pulse width information of the scan driving signal set by the scan and data pulse width setting combined means; And a data line driver for driving the corresponding data line of the display panel by pulse width modulating the data line driving signal according to the pulse width information set by the scan and data pulse width setting combination means.

According to still another aspect of the present invention, there is provided a method of driving a display panel, comprising: a first step of selecting one of a plurality of preset scan pulse width setting reference information according to a predetermined scan pulse width setting command input from an external device; A second step of setting a pulse width of a predetermined scan signal so as to correspond to the scan pulse width setting reference information selected in the first step; Setting reference information selected by an external data pulse width setting command among data pulse width setting reference information preset for each data line in a predetermined scan section determined by the pulse width information set in the second process. A third step of setting pulse width information of a predetermined data line to correspond to each other; The scan driving signal of the display panel is sequentially driven by pulse width modulating the scan driving signal according to the pulse width information set in the second process, and separately, the data line driving signal according to the pulse width information set in the third process. And a fourth process of driving the corresponding data line of the display panel by performing pulse width modulation.

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

First, a first embodiment of a driving driver of a display panel according to the present invention will be described with reference to FIG. 1.

First Embodiment

As shown in FIG. 1, a driving driver of a display panel according to an exemplary embodiment of the present invention may be configured to include corresponding scan pulse width setting reference information among preset preset scan pulse width setting instructions according to a predetermined scan pulse width setting command input from the outside. The scan pulse width setting means 100 which selects any one and sets the pulse width of the predetermined scan signal so as to correspond to the scan pulse signal, and the scan driving signal differently according to the pulse width information set by the scan pulse width setting means 100. A data line within a predetermined scan section determined by the scan line driver 110 for sequentially driving the scan lines of the display panel by pulse width modulation and the pulse width information set by the scan pulse width setting means 100. Among the preset data pulse width setting reference information, the pulse of the corresponding data line is set according to the predetermined setting reference information selected by an external data pulse width setting command. Data pulse width setting means 120 for setting the width information to correspond, and pulse width modulation of the data line driving signal in accordance with the pulse width information set by the data pulse width setting means 120 to provide a corresponding data line of the display panel. It includes a data line driver 130 for driving.

In addition, the scan pulse width setting means 100 used in the present invention includes a scan pulse width setting reference information storage unit 102 in which a plurality of scan pulse width setting reference information is preset, and a predetermined scan. Setting the plurality of scan pulse widths set in the pulse width setting reference information storage unit 102 manages read / write operations of reference information, and sets a plurality of scan pulse widths according to a predetermined scan pulse width setting command input from the outside. A scan pulse width setting manager 101 for selecting any one of the reference information and predetermined scan pulse width reference information selected by the scan pulse width setting manager 101 so as to correspond to the scan line driving signal so as to correspond thereto. It is preferable that it consists of the scan pulse width information setting part 103 which sets pulse width information.

In addition, the data pulse width setting means 120 used in the present invention, as shown in the data pulse width setting reference information storage unit 121-1, in which a plurality of data pulse width setting reference information is set for each data line. 121-2, ..., 121-n) and the data pulse width setting reference information storage unit within a predetermined scan section determined by the pulse width information set by the scan pulse width setting means 100. A data pulse width setting manager 123 for selecting and reading the pulse width information of a predetermined data line selected by an external data line pulse width setting command among preset data pulse width setting reference information, and the data; Data pulse width information setting units 122-1, 122-2, ..., 122-n, which respectively set the pulse width information of the data line driving signal so as to correspond to the setting reference information selected by the pulse width setting manager 123. It is preferable that it consists of.

In the driving driver of the display panel according to the first exemplary embodiment of the present invention, first, a plurality of preset scan pulses are set according to a predetermined scan pulse width setting command inputted from the outside by the scan pulse width setting means 100. If any one of the width setting reference information is selected and a pulse width of a predetermined scan signal is set to correspond to the corresponding width information, the scan line driver 110 may apply the pulse width information set by the scan pulse width setting means 100. Accordingly, the scan pulse width adjusting unit 111 variably pulse-modulates the scan driving signal, and the scan driver output unit 112 switches the same to sequentially drive the scan lines of the display panel.

In addition, the data pulse width setting means 120 refers to the data pulse width setting preset for each data line in a predetermined scan section determined by the pulse width information set by the scan pulse width setting means 100. Among the information, the pulse width information of the corresponding data line driving signal is set to correspond to the predetermined setting reference information selected by the external data pulse width setting command, and the data line driver 130 sets the data pulse width setting means. The data line driving signal is pulse-width modulated according to the pulse width information set at 120 to drive the corresponding data line of the display panel. Specifically, a plurality of data line pulse width adjusting units are configured to control the data pulse width setting means 120. Pulse width modulated by each data line according to the pulse width information set in the The video information output from the beam storage unit is output to the corresponding data line while switching the pulse width modulated data line driving signal to drive the corresponding data line of the display panel. The description thereof will be omitted, and the scan pulse width setting means and the data pulse width setting means for the present invention will be described in more detail below.

As shown in the preferred embodiment of the scan pulse width setting means 100 used in the present invention, first, the scan pulse width setting manager 101 sets the scan pulse width in accordance with a predetermined scan pulse width setting command input from the outside. The scan pulse width information setting unit selects one scan pulse width reference information corresponding to the input scan pulse width setting command from among a plurality of preset scan pulse width reference information by searching the reference information storage unit 102. The reference numeral 103 sets predetermined scan pulse width information corresponding to the scan pulse width reference information selected by the scan pulse width setting manager 101. The scan pulse width information may be set as the scan pulse width information. The scan pulse width reference information is set differently from each other according to the scan pulse width reference information selected by the manager 101, and the scan pulse width reference information is selected by user selection as much as possible. And the scan pulse width reference information is set or reset so that the scan pulse width setting manager 101 sends the scan pulse width setting reference information to the scan pulse width setting reference information storage 102. To manage the read / write operation of a plurality of preset scan pulse width setting reference information, the above-described configuration is just one example, and various modifications can be made without departing from the spirit of the present invention. .

According to a preferred aspect of the data pulse width setting means used in the present invention, first, as shown, the data pulse width setting manager 123 searches for the data pulse width setting reference information storage unit by an external data line pulse width setting command. The data pulse width setting reference information of the preset data line is read out for each data line. Then, the data pulse width information setting unit 122-1, 122-2, ..., 122-n performs a predetermined scan interval determined by the pulse width information set by the scan pulse width setting means 100. Refer to the data pulse width setting reference information selected and read according to an external data line pulse width setting command, and set the pulse width information of the corresponding data line, respectively. For the set data pulse width information, refer to the corresponding data pulse width. Each data line is set differently according to the information, and the data pulse width reference information is selected by user selection as much as possible, and the read / write data pulse width reference information is set or reset. It is preferable to use a predetermined table that can be written to.

Next, a second embodiment of a driving driver of a display panel according to the present invention will be described with reference to FIG. 2.

Second Embodiment

As shown in FIG. 2, the second embodiment of the drive driver of the display panel according to the present invention selects one of the preset scan pulse width reference information according to an external setting command. The scan and data pulse width setting compound means for setting the pulse width information of the scan drive signal and setting the pulse width information of the corresponding data line driving signal with reference to the preset data pulse width reference information for each data line. 200 and a scan line for sequentially driving the scan line of the display panel by pulse width modulating the scan driving signal differently according to the pulse width information of the scan driving signal set by the scan and data pulse width setting combination means 200. The pulse width change of the data line driving signal is performed according to the pulse width information set by the driver 210 and the scan and data pulse width setting combination means 200. To comprise a data line driver 220 that drives the data lines of the display panel.

In addition, the scan and data pulse width setting composite means 200 used in the present invention includes a scan pulse width setting reference information storage unit 201, in which a plurality of scan pulse width reference information is set, as shown in FIG. The data pulse width setting table 202 in which data pulse width reference information is preset for each line and one of the preset scan pulse width reference information are selected according to an external setting command, and are different for each data line. The scan and data pulse width setting manager 203 for selecting preset data pulse width reference information, and the scan width of the scan driving signal according to the scan pulse width reference information selected by the scan and data pulse width setting manager 203. A corresponding data line driving signal according to the scan pulse width information setting unit 204 for setting a value and the data pulse width reference information selected by the scan and data pulse width setting manager 203. Be formed of a plurality of the data pulse width information setting unit (205-1, 205-2, ..., 205-n) for each set the pulse width is preferred.

In the driving driver of the display panel according to the second exemplary embodiment of the present invention, first, the scan and data pulse width setting compound means 200 is configured from among preset scan pulse width reference information according to an external setting command. The pulse width of the scan driving signal is selected by using any one of them, and the pulse width information of the corresponding data line driving signal is set by referring to the data pulse width reference information preset differently for each data line.

Then, the scan line driver 210 pulse width modulates the scan driving signal differently according to the pulse width information of the scan driving signal set by the scan and data pulse width setting composite means 200 to scan line of the display panel. Are sequentially driven, and the data line driver 220 drives the corresponding data line of the display panel by pulse width modulating the data line driving signal according to the pulse width information set by the scan and data pulse width setting combination means. In the following, the scan and data pulse width setting combined means used in the present invention will be described in more detail.

As shown in the preferred embodiment of the scan and data pulse width setting composite means for the present invention, first, the scan and data pulse width setting manager 203 according to an external setting command is used to scan scan width setting reference information storage unit 201. Search to select predetermined scan pulse width setting reference information corresponding to the inputted setting command from among the plurality of scan pulse width reference information, and separately search the data pulse width setting table 202 to correspond to the inputted setting command. When the predetermined data pulse width reference information is selected for each data line, the scan pulse width information setting unit 204 performs a scan driving signal according to the scan pulse width reference information selected by the scan and data pulse width setting manager 203. Set the pulse widths, and the plurality of data pulse width information setting units 205-1, 205-2, ..., 205-n selects by the scan and data pulse width setting manager 203. According to the data pulse width reference information, the pulse widths of the corresponding data line driving signals are respectively set. In contrast to the first embodiment, the setting aspect according to the second embodiment of the present invention is a data pulse according to a predetermined data pulse width setting command. By setting the width using a table, the data pulse width can be set more easily and under systematic management. In addition, the setting time and the cost can be further reduced. Various modifications are possible without departing from the technical spirit of the present invention.

Next, the present invention will be described in more detail with reference to the timing diagrams according to the present invention with reference to FIGS. 3 and 4, as shown in FIGS. 3 and 4 above. PWM MAX) can be changed to M or N, and also the pulse width maximum value representing each gray can be arbitrarily changed by resist setting. For example, the present invention generates a PWM clock signal using an oscillator used in a driving device. Using the generated PWM clock signal, set the PWM MAX for the slowest frame frequency time and the width can be selected by the resist in N-bit. Specifically, if the PWM MAX is set to 128 (7bit), You can change the PWM MAX value by changing the selected resist value to 127, 126, 64, etc. At this time, the PWM MAX value becomes the On Time section of one scan and can change the frame frequency. to be. In other words, if the PWM clock is 1Mhz on the panel with 100 × 100 resolution and the PWM MAX is set to 100, then the frame frequency will be 100Hz. If you change the PWM MAX to 50, the frame frequency will be 200Hz. The variable frequency can be set to various values depending on how many bits the PWM MAX is divided into, and as a result, by modifying the value of the setting reference information that determines the pulse width used in the present invention through the resist setting. You can change the spacing between grays to any value.

Next, a display panel driving method according to the present invention will be described with reference to FIG. 5.

As shown in FIG. 5, another method of driving the display panel according to the present invention first monitors a predetermined scan and data pulse width setting command from the outside (S500), and then executes a predetermined scan pulse width setting command. In this case (S501), if there is predetermined scan pulse width setting reference information corresponding to the setting command input in step S501 among the plurality of preset scan pulse width setting reference information (S502) corresponding scan The pulse width setting reference information is selected and read (S503).

For example, when a predetermined scan pulse width setting command is input from the outside, the predetermined table in which a plurality of scan pulse width setting reference information is preset is searched according to the input predetermined scan pulse width setting command. If there is scan pulse width setting reference information corresponding to the received predetermined scan pulse width setting command, the scan pulse width setting reference information corresponding to the scan pulse width setting command is selected, and the scan pulse corresponding to the received scan pulse width setting command is selected. If there is no width setting reference information, it is preferable to select and read the preset reference scan pulse width setting reference information.

On the other hand, when the scan pulse width setting reference information is selected and read in step S503, the pulse width of the scan driving signal is set corresponding to the predetermined scan pulse width setting reference information read in step S503 (S504). In operation S505, the scan driving signal is pulse-width modulated according to the pulse width information set in operation S504 to sequentially drive the scan lines of the display panel in operation S506.

When the data pulse width setting command is input while monitoring a predetermined scan and data pulse width setting command from the outside according to step S500, a plurality of data pulse widths preset for each data line are provided. If there is the setting reference information corresponding to the setting command input in step S507 among the setting reference information (S508), the respective data pulse width setting reference information corresponding to each data line is selected (S509) and read out (S510). In the predetermined scan section determined by the pulse width information set in step S505, the pulse width information of the predetermined data line is set to correspond differently according to the selected setting reference information.

Such a first setting aspect for the present invention is, when a predetermined data pulse width setting command is input from the outside, in accordance with the input data pulse width setting command, is set in advance within the predetermined scan pulse width section. Among the predetermined data pulse width setting reference information, any one of the data pulse width setting reference information corresponding to the setting command is read out for each data line, and the corresponding data line driving signal so as to correspond to the read data pulse width setting reference information. Set the pulse width of.

According to a second setting aspect of the present invention, a predetermined data pulse width setting command is received from an outside, and according to the input data pulse width setting command, a table in which data pulse width setting reference information is preset for each data line is set. Search. As a result of the search, the data pulse width setting reference information corresponding to the setting command from among the predetermined data pulse width setting reference information preset in the table within the predetermined scan pulse width section is set for each data line. The pulse widths of the corresponding data line driving signals are set to correspond to the read data pulse width setting reference information.

On the other hand, if the predetermined pulse width information is set for each data line in step S511, the data line driving signal is pulse-width modulated according to the pulse width information set in step S511 (S512), and the corresponding data line of the display panel is changed. When driving (S513) terminates the present invention, the data pulse width setting reference information used in the present invention is preferably set or reset according to a predetermined user command input from the outside.

As described above, in the method of driving the display panel according to the present invention, each grayscale may be adjusted to a predetermined value corresponding to an arbitrary pulse width by a method such as a register setting, and a frame frequency different for each manufacturer. Even if it is used, it is possible to express gray according to the corresponding frame frequency on a certain proportional basis. In addition, even if the display characteristics of the panel are different for each manufacturer, the gray scale can be precisely adjusted to the desired value.

As described in detail above, the display driver and the method of the display panel according to the present invention can express the gray by adjusting each gray scale to an arbitrary value through a register setting, and also have a different frame frequency for each manufacturer. Even if it is used, it is possible to express gray according to the corresponding frame frequency on a certain proportional basis. Moreover, even if the inherent characteristics of the panel are different for each manufacturer, the gray scale can be accurately adjusted to the desired value.

Although the invention has been described in detail only with respect to the specific examples described, it will be apparent to those skilled in the art that various modifications and variations are possible within the spirit of the invention, and such modifications and variations belong to the appended claims.

Claims (10)

Scan pulse width setting means for selecting one of a plurality of preset scan pulse width setting reference information according to a predetermined scan pulse width setting command input from the outside and setting the pulse width of the predetermined scan signal to correspond thereto ; A scan line driver for sequentially driving a scan line of a corresponding display panel by pulse width modulating a scan driving signal differently according to the pulse width information set by the scan pulse width setting means; A setting that is selected by an external data pulse width setting command among data pulse width setting reference information preset for each data line within a predetermined scan section determined by the pulse width information set by the scan pulse width setting means. Data pulse width setting means for setting the pulse width information of the predetermined data line to correspond differently according to the reference information; And a data line driver for pulse width modulating the data line driving signal according to the pulse width information set by the data pulse width setting means to drive the corresponding data line of the display panel. The method of claim 1, wherein the scan pulse width setting means; A scan pulse width setting reference information storage unit in which a plurality of scan pulse width setting reference information is preset; A scan pulse for managing a read / write operation of a plurality of scan pulse width setting reference information set in the scan pulse width setting reference information storage unit and selecting one according to a predetermined scan pulse width setting command input from the outside; Width setting manager; And a scan pulse width information setting unit configured to set predetermined scan pulse width information differently to correspond to the predetermined scan pulse width reference information selected by the scan pulse width setting manager. The data pulse width setting means according to claim 1; A plurality of data pulse width setting reference information storage units in which data pulse width setting reference information is preset differently for each data line; External data line pulses among the data pulse width setting reference information preset in the data pulse width setting reference information storage unit within a predetermined scan section determined by the pulse width information set by the scan pulse width setting means. A data pulse width setting manager which selects and reads pulse width information of a predetermined data line selected by the width setting command, respectively; And a data pulse width information setting section for setting the pulse width information of a predetermined data line to correspond differently according to the setting reference information selected by the data pulse width setting manager. According to an external setting command, one of the preset scan pulse width reference information is selected and the pulse width of the scan driving signal is set using the same, and the data pulse width reference information differently preset for each data line is referred to. Scan and data pulse width setting composite means for respectively setting pulse width information of the data line driving signal; A scan line driver for sequentially driving scan lines of the corresponding display panel by pulse width modulating the scan driving signal differently according to the pulse width information of the scan driving signal set by the scan and data pulse width setting combined means; And a data line driver which pulse-modulates the data line driving signal according to the pulse width information set by the scan and data pulse width setting composite means to drive the corresponding data line of the display panel. 5. The apparatus according to claim 4, wherein the scan and data pulse width setting combination means; A scan pulse width setting reference information storage unit in which a plurality of scan pulse width reference information is preset; A data pulse width setting table in which data pulse width reference information is preset differently for each data line; According to an external setting command, one of the scan pulse width reference information preset in the scan pulse width setting reference information storage unit is selected, and the data pulse preset in the data pulse width setting table differently for each data line. A scan and data pulse width setting manager for selecting width reference information; A scan pulse width information setting unit configured to set a pulse width of a predetermined scan driving signal by the scan and data pulse width setting manager according to predetermined scan pulse width reference information selected by the scan pulse width setting reference information storage unit; And a data pulse width information setting unit for setting the pulse width of the corresponding data line driving signal according to the data pulse width reference information selected by the scan and data pulse width setting manager from the data pulse width setting table. Driven driver. A first step of selecting one of a plurality of preset scan pulse width setting reference information according to a predetermined scan pulse width setting command input from an external device; A second step of setting a pulse width of a predetermined scan signal so as to correspond to the scan pulse width setting reference information selected in the first step; Setting reference information selected by an external data pulse width setting command among data pulse width setting reference information preset for each data line in a predetermined scan section determined by the pulse width information set in the second step. A third step of setting pulse width information of a predetermined data line to correspond to each other; The scan driving signal of the display panel is sequentially driven by pulse width modulating the scan driving signal according to the pulse width information set in the second process, and separately, the data line driving signal according to the pulse width information set in the third process. And driving a corresponding data line of the display panel by performing pulse width modulation on the display panel. The method of claim 6, wherein the first process comprises; A first step of receiving a predetermined scan pulse width setting command from the outside; A first step of searching for a predetermined table in which a plurality of scan pulse width setting reference information is preset according to a predetermined scan pulse width setting command received in step 1-1; If there is scan pulse width setting reference information corresponding to the predetermined scan pulse width setting command received in step 1-1, the scan pulse width setting reference information is selected. If there is no scan pulse width setting reference information corresponding to the predetermined scan pulse width setting command received in step 1-1, step 1-3 is performed to select preset reference scan pulse width setting reference information. A method of driving a display panel. The method of claim 6, wherein the third process; Step 3-1 of receiving a predetermined data pulse width setting command from the outside; In response to the data pulse width setting command input in step 3-1, the preset command sets among the preset data pulse width setting reference information within the predetermined scan pulse width section set in the second step. Step 3-2 of reading corresponding data pulse width setting reference information for each data line; And setting a pulse width of the corresponding data line driving signal so as to correspond to the data pulse width setting reference information read out in the third step (2-2). The method of claim 6, wherein the third process; Step 3-4 of receiving a predetermined data pulse width setting command from the outside; A step 3-5 of searching for a table in which data pulse width setting reference information is preset for each data line according to the data pulse width setting command received in step 3-4; As a result of the search in step 3-5, any of the data pulse width setting reference information preset in the table within the predetermined scan pulse width section set in the second process corresponds to the setting command. A third to sixth steps of reading one data pulse width setting reference information for each data line; And a third to seventh step of setting the pulse width of the corresponding data line driving signal to correspond to the data pulse width setting reference information read out in the third to sixth steps. The data pulse width setting reference information according to claim 8 or 9; And a set or reset according to a predetermined user command input from the outside.

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