KR100682357B1 - Auto Control Device of Gamma Voltage in Liquid Crystal Display and Method of Driving the Same - Google Patents

Abstract

The present invention relates to a gamma voltage automatic adjustment device of a liquid crystal display device and a driving method thereof for adjusting the gamma voltage according to a user's preference and solving compatibility with a peripheral device connectable to the liquid crystal display device.

     An apparatus for automatically adjusting a gamma voltage of a liquid crystal display according to the present invention includes: a storage unit configured to store predetermined data and to select the predetermined data by a user; A control system unit for accessing data selected by the user among data stored in the storage unit through a predetermined bus line; And a multi-channel conversion unit connected to the control system unit and the predetermined bus line to divide the reference voltage into a predetermined gamma voltage according to data selected by a user, and transmit the divided reference voltage to a driver integrated circuit unit.

Description

Auto Control Device of Gamma Voltage in Liquid Crystal Display and Method of Driving the Same}             

1 is a view schematically showing a liquid crystal display including a conventional gamma voltage generator.

FIG. 2 is a characteristic diagram illustrating a gamma voltage generated from the gamma voltage generator shown in FIG. 1. FIG.

3 is a schematic view of a gamma voltage generator and a data drive IC according to the prior art.

4 is a schematic view of a gamma voltage generator and a data drive IC according to a first embodiment of the present invention.

FIG. 5 is a detailed diagram illustrating the multi-channel converter illustrated in FIG. 4.

6 is a view showing the format of data passing through the transmission line shown in FIG.

7 is a schematic view of a gamma voltage generator and a data drive IC according to a second embodiment of the present invention.

       <Brief description of symbols for the main parts of the drawings>                 

8, 16: gamma voltage generation unit 9: data drive IC

10: positive polarity portion 11: stabilization portion

12: voltage distribution unit 13: input unit

14 decoder unit 15 output unit

17, 28: multi-channel converter 18: storage unit

19: control system 20, 21: data line

20a, 21a: Synchronization signal line 22: Digital data receiver

23: reference voltage generator 24: DAC unit

The present invention relates to a device for automatically adjusting a gamma voltage of a liquid crystal display and a driving method thereof, and in particular, to adjust the gamma voltage according to a user's preference and to solve compatibility with peripheral devices connectable to the liquid crystal display. It relates to a gamma voltage automatic adjusting device and a driving method thereof.

Conventional active metrix liquid crystal display devices display an image by adjusting the light transmittance of the liquid crystal by an electric field applied to the liquid crystal. To this end, as shown in FIG. 1, the active matrix liquid crystal display device includes a liquid crystal panel 2 in which liquid crystal cells are arranged in a matrix form between two transparent substrates, and gate lines GL1 to liquid crystal panel 2 of the liquid crystal panel 2. A gamma voltage generator 8 connected to a gate driver 6 connected to GLm, a data driver 4 connected to data lines DL1 to DLn of the liquid crystal panel 2, and a data driver 4; It is provided. Thin film transistors (hereinafter referred to as "TFTs") are provided at the intersections of the m gate lines GL1 to GLm and the n data lines DL1 to DLn as switching elements. The gate driver 6 sequentially supplies the scanning signals to the m gate lines GL1 to GLm to drive the TFTs connected to the corresponding gate lines. As shown in FIG. 2, the gamma voltage generator 8 supplies a preset DC voltage to the data lines DL1 to DLn as a gamma voltage Vγ to have different levels for each luminance. The gamma voltage Vγ is a DC voltage having a voltage level equivalent to that of the high potential power supply VDD corresponding to the highest luminance value according to the luminance value of the video data, and a DC voltage Vn having a lower voltage level as the luminance value decreases. To V0) is selected.

3 illustrates an internal circuit diagram of the gamma voltage generator and the data drive integrated circuit (IC) described above.

The gamma voltage generator is divided into a positive polarity part (+) and a negative polarity part (−). Since the operation characteristics are the same, a circuit including only gamma voltages of positive polarity (+) will be described.

Referring to FIG. 3, first, the gamma voltage generator 8 may include a positive electrode part 10 generating gamma voltages VH1 to VH6 of positive polarity, and gamma voltages output from the positive electrode part 10. And a stabilizing section 11 for stabilizing (VH1 to VH6) and applying it to the data drive IC. The positive polarity unit 10 divides the power supply voltage VDD applied from the outside according to the resistance ratio of the first to sixth fixed resistors R1 to R6 connected in series, and thus, the first to sixth nodes are formed at each of the five nodes. Positive gamma voltages VH1 to VH6 are generated. Here, the first positive gamma voltage VH1 corresponds to a black level, the third positive gamma voltage VH3 corresponds to an intermediate level, and the sixth positive gamma voltage VH6 corresponds to a voltage level corresponding to a white level. Have. In other words, it has a voltage level that decreases from the first positive gamma voltage VH1 to the sixth positive gamma voltage VH6. The stabilization unit 11 is composed of a voltage flower to stabilize the gamma voltages VH1 to VH6 input to the stabilization unit 11 and transmit the stabilization unit 11 to the voltage distribution unit 12 of the data drive IC. In addition, the data drive IC 9 includes a voltage divider 12 for inputting a voltage output from the gamma voltage generator 8, an input 13 for inputting external image digital data, and a voltage divider ( And a decoder unit 14 for converting the digital voltage distributed in 12 to an analog voltage, and an output unit 15 for outputting the analog voltage converted in the decoder unit 14. The voltage divider 12 divides the gamma voltages VH1 to VH6 applied from the gamma voltage generator 8 in accordance with the resistance ratio of the first to 64th fixed resistors R1 to R64 connected in series to form 64. First to 64th negative driving voltages VL1 to VL64 are generated at each of the two nodes. The input unit 13 transmits externally input image digital data (here 6Bit digital data) to the decoder unit 14. The decoder 14 selects any one of the first through 64th negative driving voltages VL1 through VL64 of the voltage divider 12 based on 6Bit digital data input from the input unit 13 to output the output unit 15. In detail, when any one of the 6-bit video digital data is applied to the input unit 13, the input unit 13 transmits the input video digital data to the decoder unit 14. The image digital data transmitted to the decoder unit 14 is interpreted by the decoder, and among the negative driving voltages VL1 to VL64 applied to the decoder unit 14, the negative driving voltages VL1 to VL64 are applied. Output to the output unit 15. For example, when a digital signal of " 000000 " is applied to the 6-bit video digital data input to the input unit 13 and transmitted to the decoder unit 14, the decoder unit 14 interprets the digital data. Then, the first negative driving voltage VL1 is output to the output unit 15 among the negative driving voltages VL1 to VL64 applied to the decoder unit 14. Similarly, if a digital signal of " 111111 " is applied to 6Bit video digital data input to the input unit 13 and transmitted to the decoder unit 14, the decoder unit 14 interprets the digital data and the decoder unit 14 The 64th negative driving voltage VL1 is output to the output unit 15 among the negative driving voltages VL1 to VL64 applied to the output line 15. The output unit 15 transmits the driving voltages VL1 to VL64 output from the decoder unit 14 to the pixel cells through the data lines.

The gamma voltage generator configured in this way is composed of a fixed resistor that is fixed in hardware in advance. As a result, when the monitor of the liquid crystal display device is connected to another device and a problem occurs in the compatibility of the gamma voltage generator, it is impossible to change the gamma voltage generator due to the fixed resistance. In addition, the user may not freely adjust the color displayed on the display device due to the fixed resistance of the gamma voltage generator.

Accordingly, an object of the present invention is to adjust the gamma voltage value fixed by the conventional hardware according to the user's taste and to solve the compatibility problem with the peripheral device connectable to the liquid crystal display.

In order to achieve the above objects, an apparatus for automatically adjusting a gamma voltage of a liquid crystal display according to a first embodiment of the present invention comprises: a storage unit configured to store predetermined digital data and to select the digital data by a user; A control system unit for accessing digital data selected by the user among the digital data stored in the storage unit through a predetermined bus line; And a multi-channel conversion unit connected to the control system unit and the predetermined bus line to divide the reference voltage into predetermined gamma voltages according to the digital data selected by the user, and supply the divided reference voltages to the data driver.
The multi-channel converter comprises: a digital data receiver connected to a data line and a synchronization signal line to receive digital data and a synchronization signal from the control system unit; A reference voltage generator for generating a reference voltage; And a digital-analog converter for dividing the reference voltage from the reference voltage generator into predetermined gamma voltages using the digital data from the digital data receiver.
An apparatus for automatically adjusting a gamma voltage of a liquid crystal display according to a first embodiment of the present invention includes: a stabilizing unit for buffering and outputting the divided gamma voltages from the multi-channel converter; A driver integrated circuit unit configured to distribute the multiplied gamma voltages from the stabilization unit by a plurality of resistors, and to select one of the divided gamma voltages according to an input digital video signal and supply the selected data signal to the data driver It is provided further.
An apparatus for automatically adjusting a gamma voltage of a liquid crystal display according to a second embodiment of the present invention includes: a memory unit configured to store predetermined digital data and to select the digital data by a user; A control system unit for accessing digital data selected by the user among the digital data stored in the storage unit through a predetermined bus line; A digital image connected to the control system by a predetermined bus line to divide the reference voltage into predetermined gamma voltages according to the digital data selected by the user, and to input any one of the divided gamma voltages. And a drive integrated circuit unit for selecting and supplying the signal according to the signal.
The drive integrated circuit unit may include: a multi-channel conversion unit connected to the control system unit by a predetermined bus line to divide the reference voltage into predetermined gamma voltages according to the digital data selected by the user; A stabilization unit for buffering and outputting the divided gamma voltages from the multi-channel conversion unit; And a decoder unit for selecting one of the divided gamma voltages from the stabilization unit according to an input digital video signal and supplying the same to the data driver.
The multi-channel converter comprises: a digital data receiver connected to a data line and a synchronization signal line to receive digital data and a synchronization signal from the control system unit; A reference voltage generator for generating a reference voltage; And a digital-analog converter for dividing the reference voltage from the reference voltage generator into predetermined gamma voltages using the digital data from the digital data receiver.
In addition, the driving method of the gamma voltage automatic adjusting device of the liquid crystal display according to the first embodiment of the present invention comprises the steps of: configuring a storage unit so that predetermined digital data is stored and the digital data is selected by a user; Accessing digital data selected by the user among the digital data stored in the storage unit through a predetermined bus line; Supplying a reference voltage; Dividing the reference voltage into predetermined gamma voltages using the accessed digital data.
A driving method of an apparatus for automatically adjusting a gamma voltage of a liquid crystal display according to a first embodiment of the present invention includes buffering the divided gamma voltages; The method further includes distributing the buffered gamma voltages by a plurality of resistors and selecting one of the divided gamma voltages according to an external digital image signal to supply the data driver to the data driver.
A method of driving an apparatus for automatically adjusting a gamma voltage of a liquid crystal display according to a second embodiment of the present invention includes the steps of: configuring a memory unit such that predetermined digital data is stored and the digital data is selected by a user; Accessing digital data selected by the user among the digital data stored in the storage unit through a predetermined bus line; Supplying a reference voltage; Dividing the reference voltage into predetermined gamma voltages using the accessed digital data, and selecting one of the divided gamma voltages according to an input digital image signal and supplying the data driver to the data driver. Include.
Other objects and advantages of the present invention in addition to the above object will be apparent from the description of the preferred embodiment of the present invention with reference to the accompanying drawings.

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Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to FIGS. 4 to 7.

4 to 5 are internal circuit diagrams of a gamma voltage generator and a data drive integrated circuit (IC) according to the first embodiment of the present invention.

Here the data drive IC is constructed and driven in the same circuit as the prior art. Therefore, the description of the data drive IC will be omitted.

4 to 5, first, the gamma voltage generation unit 16 includes a storage unit (here EEPROM or EPROM) 18 in which gamma data is stored, and a control system unit 19 for executing a user's command. ), The multi-channel converter 17 for outputting the voltage as N divided voltages, and the voltages distributed and output from the multi-channel converter 17 to stabilize the data drive IC. It is provided with the stabilizer part 11 to apply. The storage unit 18 serves as a storage device for storing data, gamma data, predetermined data, etc., which are compatible with other devices by using EEPROM or EPROM. In detail, the storage unit 18 is configured to have n m-bit data for each predetermined data mode and to allow the user to select any one of the predetermined data modes. The control system unit 19 is connected to the user interface for the user to control, and is connected to the storage unit 18 and the I ² C busline 21 so that the user can control the storage unit through the control system unit 19. Allows you to select the data mode stored in (18). The multi-channel converter 17 includes a data line 20 for transmitting data and a sync signal transmitted from the storage unit 18 and a digital data receiver 22 in contact with the sync signal line 20a. A reference voltage generator 23 to which an applied voltage is applied, and a DAC unit 24 for outputting data to the stabilization unit 11 are provided. The digital data receiver 22 receives the data and the synchronization signal input through the data line 20 and the synchronization signal line 20a and transmits the data and the synchronization signal to the DAC unit 24. The reference voltage generator 23 transmits a voltage applied from the outside to the DAC unit 24. The DAC unit 24 is connected to the digital data receiver 22 and the reference voltage generator 23 to analyze data transmitted from the digital data receiver 22. Then, the external voltage transmitted from the reference voltage generator 23 is divided into predetermined voltages so as to correspond to the analyzed data and transmitted to the stabilization unit 11. The stabilization unit 11 stabilizes the voltage divided by the predetermined voltage transmitted from the DAC unit 24 and transmits it to the data drive IC 9.

Referring to the driving characteristics of the gamma voltage generation unit 16 as an example.

First, suppose that the storage unit 18 is composed of eight six-bit data for each predetermined data mode as shown in Table 1, and Table 1 is as follows.

        Mode gamma   Mode A   Mode B    Mode C   Mode D    Gamma 1   0.1875    0.3750    0.5625    0.7500    Gamma 2   1.8750    2.0625    2.2500    2.4375    Gamma 3   3.3750    3.5625    3.7500    3.9375    Gamma 4   5.0625    5.2500    5.4375    5.6250    Gamma 5   6.7500    6.9375    7.1250    7.3125    Gamma 6   8.4375    8.6250    8.8125    9.0000    Gamma 7  10.1250   10.3125   10.5000   10.6875    Gamma 8  11.8125   11.6250   11.4375   11.2500

The divided data modes ModeA to ModeD as shown in Table 1 are configured to allow a user to select a desired mode through the control system unit 19. The user can select the desired data mode (ModeA to ModeD) in the storage device 18 via an interface connected with the control system 19. The control system 19 accesses 6Bit data corresponding to the data mode (ModeA to ModeD) of the storage device 18 selected by the user, and accesses the N-channel DAC unit 17 through the data line 20. Is transmitted to the digital data receiver 22. At this time, the data format transmitted between the control system unit 19, the storage unit 18, and the multi-channel converting unit 17 is configured as shown in FIG. Referring to FIG. 6, first, a data format indicates a start bit S indicating a start bit of a data format, address bits A2 to A0 indicating an address of a DAC section, and an address of a sub DAC section embedded in the DAC section. The sub address bits SD to SA, the head bits A indicating the start of the data bits, and the data bits D5 to D0 indicating the actual data are comprised. The data format configured in this way is transmitted from the control system unit 19 to the digital data receiver 22 of the multichannel null converter 17 together with the synchronization signal. For example, when the user selects ModeA from among the data modes ModeA to ModeD stored in the storage unit 18, the control system unit 19 stores data corresponding to ModeA from the storage unit 18. After access, the data line 20 transmits the data to the digital data receiver 22 of the multi-channel converter 17. At this time, in order to synchronize the control system unit 19 and the multi-channel converter 17, the control system unit 19 simultaneously transmits the synchronization signal to the digital data receiver 22 through the synchronization signal line 20a. The digital data receiver 22 interprets the data transmitted from the control system unit 19 to match the addresses A3 to A0 of the data transmitted in the DAC units (first to eighth DACs) 24. Data is transmitted to the (first to eighth DACs) 24. At the same time, the reference voltage Vref applied from the outside through the reference voltage generator 23 is also transmitted to each of the DAC units (first to eighth DACs). Each DAC unit (first DAC to eighth DAC) converts the actual data bits D5 to D0 of the transmitted data into decimal numbers, and the reference voltage Vref applied to each DAC unit DAC1 to DAC8. Multiply by The multiplied data is divided into 64, which is the largest number that can represent 6Bit data, and the divided voltages shown in Table 2 are output to the stabilization unit 11. The voltages output to the stabilization unit 11 are again divided by the fixed resistor 12 of the data drive IC 9 and output.

Data fomat DAC output DAC output (V) when Vref = 12V Data fomat DAC output DAC output (V) when Vref = 12V 0 0 0 0 0 0 Vss 0.0000 1 0 0 0 0 0 32Vref / 64 6.0000 0 0 0 0 0 1 Vref / 64 0.1875 1 0 0 0 0 1 33Vref / 64 6.1875 0 0 0 0 1 0 2Vref / 64 0.3750 1 0 0 0 1 0 34Vref / 64 6.3750 0 0 0 0 1 1 3Vref / 64 0.5625 1 0 0 0 1 1 35Vref / 64 6.5625 0 0 0 1 0 0 4Vref / 64 0.7500 1 0 0 1 0 0 36Vref / 64 6.7500 0 0 0 1 0 1 5Vref / 64 0.9375 1 0 0 1 0 1 37Vref / 64 6.9375 0 0 0 1 1 0 6Vref / 64 1.1250 1 0 0 1 1 0 38Vref / 64 7.1250 0 0 0 1 1 1 7Vref / 64 1.3125 1 0 0 1 1 1 39Vref / 64 7.3125 0 0 1 0 0 0 8Vref / 64 1.5000 1 0 1 0 0 0 40Vref / 64 7.5000 0 0 1 0 0 1 9Vref / 64 1.6875 1 0 1 0 0 1 41Vref / 64 7.6875 0 0 1 0 1 0 10Vref / 64 1.8750 1 0 1 0 1 0 42Vref / 64 7.8750 0 0 1 0 1 1 11Vref / 64 2.0625 1 0 1 0 1 1 43Vref / 64 8.0625 0 0 1 1 0 0 12Vref / 64 2.2500 1 0 1 1 0 0 44Vref / 64 8.2500 0 0 1 1 0 1 13Vref / 64 2.4375 1 0 1 1 0 1 45Vref / 64 8.4375 0 0 1 1 1 0 14Vref / 64 2.6250 1 0 1 1 1 0 46Vref / 64 8.6250 0 0 1 1 1 1 15Vref / 64 2.8125 1 0 1 1 1 1 47Vref / 64 8.8125 0 1 0 0 0 0 16Vref / 64 3.0000 1 1 0 0 0 0 48Vref / 64 9.0000 0 1 0 0 0 1 17Vref / 64 3.1875 1 1 0 0 0 1 49 Vref / 64 9.1875 0 1 0 0 1 0 18Vref / 64 3.3750 1 1 0 0 1 0 50Vref / 64 9.3750 0 1 0 0 1 1 19Vref / 64 3.5625 1 1 0 0 1 1 51Vref / 64 9.5625 0 1 0 1 0 0 20Vref / 64 3.7500 1 1 0 1 0 0 52Vref / 64 9.7500 0 1 0 1 0 1 21Vref / 64 3.9375 1 1 0 1 0 1 53Vref / 64 9.9375 0 1 0 1 1 0 22Vref / 64 4.1250 1 1 0 1 1 0 54Vref / 64 10.1250 0 1 0 1 1 1 23Vref / 64 4.3125 1 1 0 1 1 1 55Vref / 64 10.3125 0 1 1 0 0 0 24Vref / 64 4.5000 1 1 1 0 0 0 56Vref / 64 10.4500 0 1 1 0 0 1 25Vref / 64 4.6875 1 1 1 0 0 1 57Vref / 64 10.6875 0 1 1 0 1 0 26Vref / 64 4.8750 1 1 1 0 1 0 58Vref / 64 10.8750 0 1 1 0 1 1 27Vref / 64 5.0625 1 1 1 0 1 1 59Vref / 64 11.0625 0 1 1 1 0 0 28Vref / 64 5.2500 1 1 1 1 0 0 60Vref / 64 11.2500 0 1 1 1 0 1 29Vref / 64 5.4375 1 1 1 1 0 1 61Vref / 64 11.4375 0 1 1 1 1 0 30Vref / 64 5.6250 1 1 1 1 1 0 62 Vref / 64 11.6250 0 1 1 1 1 1 31Vref / 64 5.8125 1 1 1 1 1 1 64Vref / 64 11.8125

        7 is a gamma voltage generator and a data drive according to a second embodiment of the present invention.

Internal circuit diagram of IC (Integrated Circuit).

Referring to FIGS. 7 and 5, first, the gamma voltage generation unit 25 includes a storage unit (here EEPROM or EPROM) 18 in which gamma data is stored, and a control system unit 19 for executing a user's command. ). The storage unit 18 serves as a storage device for storing data, gamma data, predetermined data, etc., which are compatible with other devices by using EEPROM or EPROM. In detail, the storage unit 18 is configured to have 64 6-bit data for each predetermined data mode and to allow the user to select any one of the predetermined data modes. The control system unit 19 is connected to the user interface for the user to control, and is connected to the storage unit 18 and the bidirectional bus line 21 so that the user can control the storage unit ( It allows you to select the data mode saved in 18). In addition, the data drive IC unit 26 stabilizes the voltages distributed and output by the multi-channel converter 28 and the multi-channel converter 28 for outputting the voltage as N divided voltages. A stabilization unit 29 to be applied, an input unit 13 to which external image digital data is input, a decoder unit 14 for converting the digital voltage distributed by the multi-channel conversion unit 28 into an analog voltage, and a decoder unit ( An output unit 15 for outputting the analog voltage converted in 14) is provided. The multi-channel converter 28 includes a data line 20 for transmitting data and a synchronization signal transmitted from the storage unit 18 and a digital data receiver 22 in contact with the synchronization signal line 20a. A reference voltage generator 23 to which an applied voltage is applied, and a DAC unit 24 for outputting data to the stabilization unit 11 are provided. The digital data receiver 22 receives the data and the synchronization signal input through the data line 20 and the synchronization signal line 20a and transmits the data and the synchronization signal to the DAC unit 24. The reference voltage generator 23 transmits a voltage applied from the outside to the DAC unit 24. The DAC unit 24 is connected to the digital data receiver 22 and the reference voltage generator 23 to analyze data transmitted from the digital data receiver 22. Then, the external voltage transmitted from the reference voltage generator 23 is divided into predetermined voltages so as to correspond to the analyzed data and transmitted to the stabilization unit 11. The stabilization unit 29 is composed of a voltage flower and is transmitted from the DAC units (DAC1 to DAC64) 24 to stabilize the voltage divided into a predetermined voltage and transmit the stabilization unit to the decoder unit 14. The input unit 13 transmits externally input image digital data (here 6Bit digital data) to the decoder unit 14. The decoder unit 14 selects one of the output voltages of the DAC unit 24 stabilized in the stabilization unit 29 by 6Bit digital data input from the input unit 13 and outputs it to the output unit 15. The output unit 15 transmits the driving voltage output from the decoder unit 14 to the pixel cell through the data line.

The driving characteristics of the gamma voltage generator 25 and the data drive IC 26 have the same driving characteristics as those of the first embodiment of the present invention. Only the multi-channel converter 28 is embedded in the data drive IC 26 so that the DAC unit 24 configured in the multi-channel converter 28 is not required without the fixed resistor built in the first embodiment of the present invention. The gamma voltage is directly applied to the decoder unit 14. As a result, the DAC unit 24 to which the gamma voltage is output is determined according to the number of data bits incorporated in the storage unit 18.

As described above, the gamma voltage automatic adjustment device of the liquid crystal display according to the present invention can solve the compatibility problem with the peripheral device connectable to the liquid crystal display device while the user can adjust the gamma voltage value.                     

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.

Claims (11)

A liquid crystal display device comprising a pixel disposed at an intersection of a plurality of data lines and a plurality of gate lines in a matrix form and having a data driver for supplying data to the data lines. A storage unit configured to store predetermined digital data and to select the digital data by a user; A control system unit for accessing digital data selected by the user among the digital data stored in the storage unit through a predetermined bus line; And a multi-channel conversion unit connected to the control system unit and the predetermined bus line to divide the reference voltage into predetermined gamma voltages according to the digital data selected by the user, and supply the divided reference voltages to the data driver. Gamma voltage automatic adjustment device of the liquid crystal display device. A liquid crystal display device comprising a pixel disposed at an intersection of a plurality of data lines and a plurality of gate lines in a matrix form and having a data driver for supplying data to the data lines. A storage unit configured to store predetermined digital data and to select the digital data by a user; A control system unit for accessing digital data selected by the user among the digital data stored in the storage unit through a predetermined bus line; A digital image connected to the control system by a predetermined bus line to divide the reference voltage into predetermined gamma voltages according to the digital data selected by the user, and to input any one of the divided gamma voltages. And a drive integrated circuit unit for selecting and supplying the signal to the data drive according to a signal. The method of claim 1, A stabilization unit for buffering and outputting the divided gamma voltages from the multi-channel converter; A driver integrated circuit unit configured to distribute the multiplied gamma voltages from the stabilization unit by a plurality of resistors, and to select one of the divided gamma voltages according to an input digital video signal and supply the selected data signal to the data driver The gamma voltage automatic adjustment device of the liquid crystal display device further comprising. The method of claim 1, The multi-channel converter, A digital data receiver connected to a data line and a synchronization signal line to receive digital data and a synchronization signal from the control system unit; A reference voltage generator for generating a reference voltage; And a digital-analog converter for dividing the reference voltage from the reference voltage generator into predetermined gamma voltages using digital data from the digital data receiver. Device. The method of claim 2, The drive integrated circuit unit, A multi-channel conversion unit connected to the control system unit by a predetermined bus line to divide the reference voltage into predetermined gamma voltages according to the digital data selected by the user; A stabilization unit for buffering and outputting the divided gamma voltages from the multi-channel conversion unit; And a decoder unit for selecting any one of the divided gamma voltages from the stabilization unit according to an input digital video signal and supplying the data driver to the data driver. In the method of driving a liquid crystal display device having pixels arranged in a matrix form at intersections of a plurality of data lines and a plurality of gate lines, and having a data driver for supplying data to the data lines. Configuring a storage unit to store predetermined digital data and to select the digital data by a user; Accessing digital data selected by the user among the digital data stored in the storage unit through a predetermined bus line; Supplying a reference voltage; And dividing the reference voltage into predetermined gamma voltages using the accessed digital data. In the method of driving a liquid crystal display device having pixels arranged in a matrix form at intersections of a plurality of data lines and a plurality of gate lines, and having a data driver for supplying data to the data lines. Configuring a storage unit to store predetermined digital data and to select the digital data by a user; Accessing digital data selected by the user among the digital data stored in the storage unit through a predetermined bus line; Supplying a reference voltage; Dividing the reference voltage into predetermined gamma voltages using the accessed digital data, and selecting one of the divided gamma voltages according to an input digital image signal and supplying the data driver to the data driver. And a gamma voltage automatic adjusting device of the liquid crystal display device. The method of claim 6, Buffering the divided gamma voltages; And dividing the buffered gamma voltages by a plurality of resistors, and selecting one of the divided gamma voltages according to an external digital image signal and supplying the buffered gamma voltages to the data driver. Method of driving gamma voltage automatic regulation device. delete delete The method of claim 5, The multi-channel converter, A digital data receiver connected to a data line and a synchronization signal line to receive digital data and a synchronization signal from the control system unit; A reference voltage generator for generating a reference voltage; And a digital-analog converter for dividing the reference voltage from the reference voltage generator into predetermined gamma voltages using digital data from the digital data receiver. Device.

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