KR101308436B1 - Apparatus and method for driving of image display device - Google Patents

Abstract

The present invention relates to a driving device and a driving method of an image display device capable of improving image quality by removing an operation flow according to a display image.

An apparatus for driving an image display device according to the present invention includes an image display unit including pixel cells formed in regions defined by a plurality of gate lines and a plurality of data lines; One frame of input data is converted into the same double frame data, and the gamma characteristic of the double frame data is modulated in units of frames according to the image mode of the input data and supplied to the image display unit, or the double frame data is directly supplied to the image display unit. It characterized in that it comprises a drive circuit portion for supplying to.

According to this configuration, the present invention can effectively remove the operation flow phenomenon according to the image mode, thereby realizing a clear display image without the operation flow and flicker.

Double Frame, Motion Flow, Flicker, Picture Mode, Interlace

Description

Driving apparatus and driving method of an image display device {APPARATUS AND METHOD FOR DRIVING OF IMAGE DISPLAY DEVICE}

1 is a characteristic diagram showing driving characteristics of a display device driven in an impulse form.

2 is a characteristic diagram illustrating driving characteristics of a display device driven in a hold form.

3 is a view schematically illustrating a driving device of an image display device according to an exemplary embodiment of the present invention.

4 is a block diagram schematically illustrating a timing controller according to an exemplary embodiment of the present invention.

5 is a block diagram schematically illustrating a data converter according to an exemplary embodiment of the present invention.

6A is a graph illustrating a reference gamma curve of input data according to an embodiment of the present invention.

Figure 6b is a graph showing a high gamma curve according to an embodiment of the present invention.

6C is a graph illustrating a low gamma curve according to an embodiment of the present invention.

FIG. 7 is a block diagram schematically illustrating a first image mode data modulator shown in FIG. 5. FIG.

FIG. 8 is a block diagram schematically illustrating a second image mode data modulator shown in FIG. 5. FIG.

9 is a photograph showing an original image of one frame according to an embodiment of the present invention.

FIG. 10A is a photograph showing a display image of an Nth frame by the first image mode data modulator shown in FIG. 5; FIG.

FIG. 10B is a photograph showing a display image of an N + 1th frame by the first image mode data modulator shown in FIG. 5; FIG.

FIG. 11A is a photograph showing a display image of an Nth frame by the second image mode data modulator shown in FIG. 5; FIG.

FIG. 11B is a photograph showing a display image of an N + 1th frame by the second image mode data modulator shown in FIG. 5; FIG.

FIG. 12A is a photograph showing a display image of an Nth frame by the third image mode data modulator shown in FIG. 5; FIG.

FIG. 12B is a photograph showing a display image of an N + 1th frame by the three image mode data modulator shown in FIG. 5; FIG.

13 is a block diagram schematically illustrating a data converter according to another exemplary embodiment of the present invention.

FIG. 14 is a block diagram schematically illustrating a first image mode data modulator shown in FIG. 13. FIG.

FIG. 15 is a block diagram schematically illustrating a second image mode data modulator shown in FIG. 13. FIG.

FIG. 16A is a photograph showing a display image of an Nth frame by the first image mode data modulator shown in FIG. 13; FIG.

FIG. 16B is a photograph showing a display image of the N + 1th frame by the first image mode data modulator shown in FIG. 13; FIG.

FIG. 17A is a photograph showing a display image of an Nth frame by the second image mode data modulator shown in FIG. 13; FIG.

FIG. 17B is a photograph showing a display image of the N + 1th frame by the second image mode data modulator shown in FIG. 13; FIG.

FIG. 12A is a photograph showing a display image of an Nth frame by the third image mode data modulator shown in FIG. 13; FIG.

FIG. 12B is a photograph showing a display image of an N + 1th frame by the three image mode data modulator shown in FIG. 13; FIG.

Description of the Related Art [0002]

2: video display unit

4: gate driver

6: data driver

8: timing controller

10: driving circuit part

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an image display device, and more particularly, to a driving device and a driving method of an image display device capable of improving image quality by removing an operation flow according to a display image.

Recently, various flat panel display devices that can reduce weight and volume, which are disadvantages of cathode ray tubes, have emerged. Examples of such flat panel display devices include a liquid crystal display, a field emission display, a plasma display panel, and a light emitting display.

Among flat panel displays, liquid crystal displays display a moving image using a thin film transistor as a switching element. The liquid crystal display device can be miniaturized compared to the cathode ray tube, and is widely used in personal computers and notebook computers, as well as office automation equipment such as photocopiers and portable devices such as mobile phones.

Meanwhile, the cathode ray tube, the plasma display panel, and the field emission display device display data by emitting phosphors for only a very short initial time of one frame period as shown in FIG. 1, and almost all of one frame period is paused. The display device is driven in the form of an impulse that remains.

In the display device driven in the form of an impulse, the continuation of adjacent frame images is blocked, and the sharpness of the display image is even and the blurring phenomenon of blurring the display image is prevented.

On the contrary, in the liquid crystal display and the light emitting display, as shown in FIG. 2, the data is supplied to the pixel during the scanning period by the gate high voltage, and the data is displayed by maintaining the data supplied to the pixel during the non-scanning period of most of one frame period. It is a display device driven in a hold form.

In the hold type display device, the image is maintained at one frame period, so that a motion blurring phenomenon occurs in which the displayed video is blurred. Thus, display quality is deteriorated.

Accordingly, in order to solve the above problems, the present invention is to provide a driving device and a driving method of an image display device to improve the image quality by removing the operation flow according to the display image.

According to an aspect of the present invention, there is provided a driving apparatus of an image display device including an image display unit including pixel cells formed in regions defined by a plurality of gate lines and a plurality of data lines; One frame of input data is converted into the same double frame data, and the gamma characteristic of the double frame data is modulated in units of frames according to the image mode of the input data and supplied to the image display unit, or the double frame data is directly supplied to the image display unit. It characterized in that it comprises a drive circuit portion for supplying to.

A method of driving an image display device according to an exemplary embodiment of the present invention includes an image display device including a pixel cell formed for each region defined by a plurality of gate lines and a plurality of data lines; Converting one frame of input data into the same double frame data, and modulating a gamma characteristic of the double frame data on a frame-by-frame basis or outputting the double frame data as it is according to the image mode of the input data; And a third step of supplying a scan pulse to each subpixel, and converting the data supplied from the first step into an image signal and supplying the data line to the data line so as to be synchronized with the scan pulse. It is done.

Hereinafter, an embodiment of the present invention will be described in detail with reference to the accompanying drawings and embodiments.

3 is a diagram schematically illustrating a driving device of an image display device according to an exemplary embodiment of the present invention.

Referring to FIG. 3, a driving apparatus of an image display device according to an exemplary embodiment includes pixel cells formed in regions defined by a plurality of gate lines GL1 through GLn and a plurality of data lines DL1 through DLm. An image display unit 2; The input data RGB of one input frame is converted into the same double frame data, and the gamma characteristic of the double frame data is modulated in units of frames according to the image mode of the input data RGB to be supplied to the image display unit 2 or doubled. And a driving circuit section 10 for supplying frame data to the video display section 2 as it is.

The image display unit 2 includes a thin film transistor TFT formed in an area defined by n gate lines GL1 through GLn and m data lines DL1 through DLm, and a pixel cell connected to the thin film transistor TFT. It is provided. The thin film transistor TFT supplies the image signals from the data lines DL1 to DLm to the pixel cells in response to the scan pulses from the gate lines GL1 to GLn. The pixel cell is composed of a common electrode facing each other with a liquid crystal interposed therebetween and a pixel electrode connected to the thin film transistor TFT, and thus may be equivalently represented as a liquid crystal capacitor Clc. In addition, the pixel cell includes a storage capacitor Cst for maintaining the image signal charged in the liquid crystal capacitor Clc until the next image signal is charged.

The driving circuit unit 10 converts the input data RGB of one frame input into the same double frame data, modulates the gamma characteristic of the double frame data in units of frames according to the image mode of the input data RGB, or double frame data. A timing controller 8 for outputting it as it is; A gate driver 4 which sequentially supplies scan pulses to the gate lines GL1 to GLn under the control of the timing controller 8; A data driver 6 for converting each of the data Data from the timing controller 8 into an image signal under the control of the timing controller 8 and supplying the data signals to the corresponding data lines DL1 to DLm so as to be synchronized with the scan pulse. It is configured by.

The gate driver 4 sequentially generates scan pulses, that is, gate high pulses, according to the gate control signal GCS from the timing controller 8, and sequentially supplies the gate pulses to the gate lines GL1 to GLn. In response to this scan pulse, the thin film transistor TFT is turned on.

The data driver 6 converts data from the timing controller 8 into an image signal, which is an analog signal, in accordance with the data control signal DCS from the timing controller 8 to the gate lines GL1 to GLn. An image signal of one horizontal line is supplied to the data lines DL1 through DLm every one horizontal period in which the scan pulse is supplied. At this time, the data driver 6 inverts the polarity of the image signal supplied to the data lines DL1 to DLm in response to the polarity control signal.

The timing controller 8 includes a control signal generator 22 and a data converter 24 as shown in FIG. 4.

The control signal generator 22 divides each of the main clock MCLK, the data enable signal DE, and the horizontal and vertical synchronization signals Hsync and Vsync which are input from the outside, and divides the main clock MCLK. Gate control to control the data control signal DCS and the gate driver 4 to control the data driver 6 using the data enable signal DE and the horizontal and vertical synchronization signals Hsync and Vsync '. Generate signal GCS. The data control signal DCS includes a source output enable SOE, a source shift clock SSC, a source start pulse SSP, a polarity control signal POL, and the gate control signal GCS. Start pulse SSP, gate shift clock GSC and gate output enable GOE.

The control signal generator 22 supplies the two-divided vertical synchronization signal Vsync 'to the data converter 24.

The data converter 24 converts the input data RGB into double frame data, modulates the gamma characteristics of the double frame data in units of frames according to the image mode of the input data RGB, and supplies the same to the data driver 6. The double frame data is supplied to the data driver 6 as it is.

To this end, the data converter 24 according to the first exemplary embodiment of the present invention includes a double frame generator 110 and a modulator 112 as shown in FIG. 5.

The double frame generator 110 converts one frame of the input data RGB input at the first frame frequency into the same double frame data FData. For example, the double frame generator 110 converts the input data RGB input at a frequency of 60 Hz from the outside so as to have a frequency of 120 Hz and supplies the converted data to the modulator 112.

The modulator 112 inverts the double frame data FData from the double frame generator 110 to a high gamma characteristic or a low gamma characteristic in units of frames according to the image mode IMS of the input data RGB. (6) or to the data driver 6 by inverting only the subtitle data from the double frame data (FData) into a high gamma characteristic or a low gamma characteristic in units of frames, or double frame data (FData) having a reference gamma characteristic. Is supplied to the data driver 6 as it is.

To this end, the modulator 112 may include a first selector 120, a frame signal generator 122, a high gamma lookup table 130, a low gamma lookup table 132, and first to third image mode data modulation. It is configured to include the unit 140, 150, 160, and the data output unit 170.

The first selector 120 may convert the double frame data FData supplied from the double frame generator 110 according to the image mode signal IMS corresponding to the user's selection to the first to third image mode data modulators ( 140, 150, 160). In this case, the image mode signal IMS may include a first logic state corresponding to a digital versatile disc (DVD) or a video, a second logic state corresponding to a television image, and a third image corresponding to a monitor image of a computer according to a user's setting. Has a logical state.

Accordingly, the first selector 120 supplies the double frame data FData to the first image mode data modulator 140 in accordance with the image mode signal IMS in the first logic state. The double frame data FData is supplied to the second image mode data modulator 150 according to the image mode signal IMS, and the double frame data FData is stored according to the image mode signal IMS in the third logic state. 3 is supplied to the image mode data modulator 160.

The frame signal generator 122 generates the frame signal FS using the two divided vertical sync signals Vsync 'from the control signal generator 22. That is, the frame signal generator 122 generates a high frame signal FS corresponding to the Nth frame by counting the two divided vertical sync signals Vsync ', and generates a frame signal FS corresponding to the Nth frame. The frame signal FS of the corresponding low state is generated.

In the high gamma lookup table 130, as shown in FIG. 6A, a gamma value of the high gamma curve HGC for modulating the double frame data FData corresponding to the reference gamma curve Ref_GC to a relatively high gray level is registered. . In this case, as shown in FIG. 6B, the high gamma curve HGC is set such that the ratio of the output gray level to the input gray level decreases as the input gray level increases below the first gray level value Ref1. Above Ref1, the output gradation is set to have a maximum gradation value Max. Here, the first reference gray value Ref1 may be set by the user's setting and may have a value of half or more of the maximum gray value Max.

The high gamma lookup table 130 provides high gamma data HGD corresponding to the gamma value of the listed high gamma curve HGC to the first and second image mode data modulators 140 and 150.

As shown in FIG. 6A, the gamma value of the low gamma curve LGC for modulating the double frame data FData corresponding to the reference gamma curve Ref_GC to a relatively low gray level is listed in the low gamma lookup table 132. . At this time, as shown in FIG. 6C, the low gamma curve LGC is set such that the output gray level has a minimum gray value Min when the second gray level value Ref2 is lower than the second gray level value Ref2, and is greater than or equal to the second reference gray value Ref2. In FIG. 9, the ratio of the output gray to the input gray increases as the input gray increases. Here, the second reference gray value Ref2 is set by the user's setting and may have a value of half of the maximum gray value Max.

The row gamma lookup table 132 provides the row gamma data LGD corresponding to the gamma value of the listed row gamma curve LGC to the first and second image mode data modulators 140 and 150.

In FIG. 5, the first image mode data modulator 140 modulates the double frame data FData to have a high gamma characteristic in the Nth frame according to the frame signal FS, and the double frame in the N + 1 frame. The data FData is modulated to have a low gamma characteristic.

To this end, the first image mode data modulator 140 includes a second selector 206, first and second data modulators 210 and 212, as shown in FIG. 7.

The second selector 206 supplies the double frame data FData from the first selector 120 to the first data modulator 210 according to the frame signal FS in the high state, and the frame in the low state. The double frame data FData from the first selector 120 is supplied to the second data modulator 212 according to the signal FS.

The first data modulator 210 modulates the double frame data FData from the second selector 206 to correspond to the high gamma data HGD provided from the high gamma lookup table 130. 170).

The second data modulator 212 modulates the double frame data FData from the second selector 206 so as to correspond to the low gamma data LGD provided from the low gamma lookup table 132. 170).

In FIG. 5, the second image mode data modulator 150 modulates the caption data of the double frame data FData in the Nth frame to have a high gamma characteristic in the Nth frame according to the frame signal FS in the high state. In the N + 1th frame, the caption data of the double frame data FData is modulated to have a low gamma characteristic in accordance with the frame signal FS.

To this end, the second image mode data modulator 150 may include the frame memory 230, the caption data detector 232, the third and fourth selectors 234 and 236, the first and the second image mode data modulator 150, as shown in FIG. 8. And a second caption data modulator 238 and 240 and a delay unit 242.

The frame memory 230 stores the double frame data FData from the first selector 120 in units of frames.

The caption data detection unit 232 compares the data of the caption area by comparing the double frame data FData from the first selector 120 with the data of the caption area among the double frame data FData of the previous frame stored in the frame memory 230. A caption signal SDS of a high or low state corresponding to the presence or absence is generated. That is, the caption data detector 232 compares the data of the caption area with the double frame data (FData) of the previous frame and the current frame by unit of pixel to generate the caption signal SDS in the high state when there is no data movement. In response to the movement of data, the subtitle signal SDS is generated.

The third selector 234 supplies the double frame data FData to the delay unit 242 according to the low caption signal SDS, and the double frame data FData according to the high caption signal SDS. Is supplied to the fourth selector 236. As a result, the third selector 234 supplies caption data of the caption region to the fourth selector 236 according to the caption signal SDS, and supplies remaining data except the caption data to the delay unit 242. .

The fourth selector 236 receives the caption data of the double frame data FData supplied from the third selector 234 according to the high frame signal FS supplied from the frame signal generator 122. The caption data modulator 238 is supplied, and the caption data is supplied to the second caption data modulator 240 according to the frame signal FS in the low state.

The first caption data modulator 238 modulates the caption data of the double frame data FData from the fourth selector 236 to correspond to the high gamma data HGD provided from the high gamma lookup table 130. The data output unit 170 supplies the data.

The second caption data modulator 240 modulates the caption data of the double frame data FData from the fourth selector 236 to correspond to the row gamma data LGD provided from the row gamma lookup table 132. The data output unit 170 supplies the data.

The delay unit 242 delays the double frame data FData from the third selector 234 by a time corresponding to the time when the first or second caption data modulators 238 and 240 modulate the caption data. The data output unit 170 supplies the data.

In FIG. 5, the third image mode data modulator 160 selects the first selector by a time corresponding to a time for modulating the double frame data FData in the first or second image mode data modulators 140 and 150. The double frame data FData from 120 is delayed and supplied to the data output unit 170.

The data output unit 170 aligns the double frame data supplied from any one of the first and second image mode data modulators 140 and 150 and the third image mode data modulator 160 and arranges the aligned data ( Data) is supplied to the data driver 6.

As described above, the driving device and the driving method of the image display device including the data converter 24 according to the first exemplary embodiment of the present invention are configured to convert the input data RGB of one frame as shown in FIG. 9 into double frame data. The image display unit 2 converts the double frame data into high gamma and low gamma characteristics on a frame-by-frame basis as shown in FIGS. 10A and 10B according to a user's setting according to the image mode of the input data RGB. 11A and 11B, only the caption data in the double frame data is inverted into high gamma and low gamma characteristics on a frame basis and displayed on the image display unit 2, or as shown in FIGS. 12A and 12B. As shown in the drawing, the double frame data having the reference gamma characteristic is displayed on the image display unit 2 as it is.

Therefore, the driving device and the driving method of the video display device according to the first embodiment of the present invention effectively removes the motion flow phenomenon in accordance with the DVD / video, television video and the monitor video of the computer to remove the subtitles of the DVD / video and television And it can display clearly without flicker.

13 is a block diagram schematically illustrating a data converter according to a second exemplary embodiment of the present invention.

Referring to FIG. 13 and FIG. 4, the data converter 24 according to the second exemplary embodiment of the present invention converts the input data RGB into the double frame data, and frame-by-frame according to the image mode of the input data RGB. The gamma characteristics of odd and even data of the double frame data are modulated and supplied to the data driver 6 or the double frame data is supplied to the data driver 6 as it is.

To this end, the data converter 24 according to the second embodiment of the present invention includes a double frame generator 110 and a modulator 212.

The double frame generation unit 110 converts one frame of the input data RGB input at the first frame frequency into the same double frame data FData. For example, the double frame generation unit 110 converts the input data RGB input at a frequency of 60 Hz from the outside so as to have a frequency of 120 Hz and supplies it to the modulation unit 212.

The modulator 212 separates the double frame data FData from the double frame generator 210 into odd data and even data according to the image mode IMS of the input data RGB, and divides odd and even data into frame units. It is inverted to a low high gamma characteristic or a low gamma characteristic and supplied to the data driver 6, or only the subtitle data is divided into odd data and even data in double frame data (FData), and the odd and even data are high gamma characteristic or frame unit. Inverting to the low gamma characteristic is supplied to the data driver 6, or double frame data FData having the reference gamma characteristic is supplied to the data driver 6 as it is.

To this end, the modulator 212 may include a first selector 120, a frame signal generator 122, a high gamma lookup table 130, a low gamma lookup table 132, and first to third image mode data modulation. And a unit 240, 250, 260, and a data output unit 270.

In the modulator 212, the first selector 120, the frame signal generator 122, the high gamma lookup table 130, and the low gamma lookup table 132 are the same as those described with reference to FIG. 5. Therefore, detailed description will be replaced by the above description.

The first image mode data modulator 240 modulates the odd data OD of the double frame data FData to have a high gamma characteristic in the Nth frame according to the frame signal FS in the high state, and at the same time, the even data. Modulates ED to have a low gamma characteristic, and modulates odd data OD of double frame data FData to have a low gamma characteristic in the N + 1th frame according to the frame signal FS in the low state. At the same time, the even data ED is modulated to have a high gamma characteristic.

To this end, the first image mode data modulator 240 may include the first data separator 304, the first and second selectors 306 and 308, and the first and second data modulation as illustrated in FIG. 14. It comprises a part (310, 312).

The first data separator 304 separates the double frame data FData from the first selector 120 into odd data OD and even data ED. The first data separator 304 supplies the separated odd data OD to the second selector 306 and supplies the separated even data ED to the third selector 308.

The second selector 306 supplies the odd data OD from the first data separator 304 to the first data modulator 310 according to the frame signal FS in the high state, and the frame in the low state. The odd data OD is supplied to the second data modulator 312 according to the signal FS.

The third selector 308 supplies the even data ED from the first data separator 304 to the second data modulator 312 according to the frame signal FS in the high state, and supplies the frame in the low state. The even data ED is supplied to the first data modulator 310 according to the signal FS.

The first data modulator 310 may provide the odd data OD supplied from the second selector 306 from the high gamma lookup table 130 according to the frame signal FS in the high state. It modulates to correspond to HGD) and supplies the modulated odd data OData to the data output unit 270. In addition, the first data modulator 310 may supply the even data ED supplied from the third selector 308 from the high gamma lookup table 130 according to the frame signal FS in the low state. Modulated to correspond to HGD, and the modulated even data EData is supplied to the data output unit 270.

The second data modulator 312 is configured to supply even data ED supplied from the third selector 308 from the low gamma lookup table 132 according to the frame signal FS in the high state. ) And modulated even data EData to the data output unit 270. In addition, the second data modulator 312 may supply the odd data OD supplied from the second selector 306 from the low gamma lookup table 132 according to the frame signal FS in the low state. Modulated to correspond to LGD, and the modulated odd data OData is supplied to the data output unit 270.

In FIG. 13, the second image mode data modulator 250 modulates the odd caption data of the double frame data FData to have a high gamma characteristic in the Nth frame according to the frame signal FS in the high state. The even caption data is modulated to have a low gamma characteristic, and the odd caption data of the double frame data FData is modulated to have a low gamma characteristic in the N + 1th frame according to the frame signal FS in the low state. The even caption data is modulated to have a high gamma characteristic.

To this end, the second image mode data modulator 250 selects the frame memory 330, the caption data detector 332, the second data separator 333, and the fourth to sixth selected as shown in FIG. 15. And a section 334, 336, 337, first and second subtitle data modulation sections 338, 340, and a delay section 342.

The frame memory 330 stores the double frame data FData from the first selector 120 in units of frames.

The caption data detector 332 compares the data of the caption area by comparing the double frame data FData from the first selector 120 with the data of the caption area among the double frame data FData of the previous frame stored in the frame memory 330. A caption signal SDS of a high or low state corresponding to the presence or absence is generated. That is, the caption data detection unit 332 compares the data of the caption area in unit pixel units with the double frame data (FData) of the previous frame and the current frame to generate a caption signal SDS in a high state when there is no data movement. In response to the movement of data, the subtitle signal SDS is generated.

The second data separator 333 divides the double frame data FData from the first selector 120 into odd data OD and even data ED and supplies the divided data to the fourth selector 334.

The fourth selector 334 delays the odd and even data OD and ED of the double frame data FData supplied from the second data separator 333 according to the subtitle signal SDS in the low state. ), Odd data OD of the double frame data FData is supplied to the fifth selector 336 according to the high-captioned signal SDS, and even data ED of the double frame data FData is supplied. ) Is supplied to the sixth selector 337. As a result, the fourth selector 334 supplies the odd caption data OD of the caption region to the fifth selector 336 according to the caption signal SDS, and supplies the even caption data ED to the sixth selector. 337, the remaining data other than the caption data is supplied to the delay unit 342.

The fifth selector 336 performs odd subtitle data OD of the double frame data FData supplied from the fourth selector 334 according to the frame signal FS in the high state supplied from the frame signal generator 122. ) Is supplied to the first caption data modulator 338, and the odd caption data OD from the fourth selector 334 is supplied to the second caption data modulator 240 according to the frame signal FS in the low state. To feed.

The sixth selector 337 is even-captioned data ED of the double frame data FData supplied from the fourth selector 334 according to the high frame signal FS supplied from the frame signal generator 122. ) Is supplied to the second caption data modulator 340, and the even caption data ED from the fourth selector 334 is supplied to the first caption data modulator 338 according to the frame signal FS in the low state. To feed.

The first subtitle data modulator 338 may generate the high gamma lookup table 130 based on the odd subtitle data OD of the double frame data FData supplied from the fifth selector 336 according to the frame signal FS in the high state. The modulated odd subtitle data OData is supplied to the data output unit 270 so as to correspond to the high gamma data HGD.

In addition, the first subtitle data modulator 338 may generate the high gamma lookup table based on the even subtitle data ED of the double frame data FData supplied from the sixth selector 337 according to the frame signal FS in the low state. Modulated to correspond to the high gamma data HGD provided from 130, and the modulated even caption data EData is supplied to the data output unit 270.

The second caption data modulator 340 may generate the low-gamma lookup table 132 of even caption data ED of the double frame data FData supplied from the sixth selector 337 according to the frame signal FS in the high state. In order to correspond to the raw gamma data (LGD) provided from the ()), the modulated even-captioned data (EData) is supplied to the data output unit (270).

In addition, the second subtitle data modulator 340 may generate the odd gamma lookup table of odd subtitle data OD of the double frame data FData supplied from the fifth selector 336 according to the frame signal FS in the low state. Modulated to correspond to the low gamma data LGD provided from 132, and the modulated odd caption data OData is supplied to the data output unit 270.

The delay unit 342 is a double frame data (FData) from the fourth selector 334 by a time corresponding to the time when the first or second subtitle data modulator 338, 340 modulates the odd or even subtitle data. The delay is supplied to the data output unit 270.

In FIG. 13, the third image mode data modulator 260 separates the double frame data FData from the first selector 120 into odd data and even data, and separates the separated odd data and even data from the first or the first data. The second image mode data modulators 240 and 250 may delay the double frame data FData by a time corresponding to a time for modulating the double frame data FData and supply the same to the data output unit 270.

The data output unit 270 is even with odd data OData of the double frame data supplied from one of the first and second image mode data modulators 140 and 150 and the third image mode data modulator 260. The data EData is supplied to the data driver 6.

As described above, the driving apparatus and the driving method of the image display apparatus including the data converter 24 according to the second exemplary embodiment of the present invention are configured to convert the input data RGB of one frame as shown in FIG. 9 into double frame data. And odd and even data divided into odd and even data of the double frame data according to a user's setting according to an image mode of the input data RGB, and are separated in frame units as shown in FIGS. 16A and 16B. It is displayed on the image display unit 2 in an interlace manner by inverting the high gamma characteristic and the low gamma characteristic, or as shown in FIGS. 17A and 17B, only odd and even subtitle data of the double frame data are high per frame. The subtitle data is displayed on the image display unit 2 in an interlaced manner by inverting the gamma characteristic and the low gamma characteristic, or as shown in FIGS. 12A and 12B. As described above, the double frame data of the reference gamma characteristic is displayed on the video display unit 2 as it is.

Therefore, the driving device and the driving method of the video display device according to the second embodiment of the present invention interlaces the subtitles of the DVD / video and television by effectively eliminating the motion flow phenomenon according to the DVD / video, television image and the monitor image of the computer Can be clearly displayed without motion flow and flicker.

On the other hand, the present invention described above is not limited to the above-described embodiment and the accompanying drawings, it is possible that various substitutions, modifications and changes within the scope without departing from the technical spirit of the present invention It will be apparent to those of ordinary skill in the art.

The driving apparatus and driving method of an image display device according to the embodiment of the present invention as described above converts input data into double frame data, and when the double frame data is a DVD / movie, high gamma and low gamma characteristics are frame-by-frame. Inverted to have high gamma and low gamma characteristics per frame in the case of a television image, and in the case of a monitor image other than a video, the original image having a reference gamma characteristic is displayed as it is. By effectively eliminating the motion flow phenomenon, a clear display image can be realized without motion flow and flicker.

In addition, the driving apparatus and driving method of the image display apparatus according to another embodiment of the present invention converts input data into double frame data, and when the double frame data is a DVD / movie, odd and even data of the double frame data are frame-wise. Inverted to have a low high gamma characteristic and a low gamma characteristic to be driven in an interlaced manner, and in the case of a television image, only odd and even subtitle data are inverted to have a high gamma characteristic and a low gamma characteristic in a frame unit to be driven in an interlace manner. In the case of a monitor image other than a video, the original image having a reference gamma characteristic is displayed as it is, thereby effectively eliminating the motion flow phenomenon according to the image mode, thereby realizing a clear display image without motion flow and flicker.

Therefore, the driving apparatus and the driving method of the image display apparatus according to an embodiment of the present invention can display a clear and three-dimensional moving image without a motion flow phenomenon.

Claims (29)

An image display unit including pixel cells formed in regions defined by a plurality of gate lines and a plurality of data lines; One frame of input data is converted into the same double frame data, and the gamma characteristic of the double frame data is modulated in units of frames according to the image mode of the input data and supplied to the image display unit, or the double frame data is directly supplied to the image display unit. A driving circuit portion for supplying the power to the circuit; The driving circuit unit A timing controller for converting the input data into the double frame data and modulating the gamma characteristic of the double frame data on a frame-by-frame basis or outputting the double frame data as it is according to the video mode; A gate driver sequentially supplying scan pulses to the gate lines under the control of the timing controller; A data driver for converting data from the timing controller into an image signal and supplying the data line to the data line so as to be synchronized with the scan pulse under the control of the timing controller; The image mode may be any one of a first logical state corresponding to a DVD (Digital Versatile Disc) / movie, a second logical state corresponding to a television image, and a third logical state corresponding to a monitor image of a computer according to a user's setting. Driving apparatus for a video display device, characterized in that set to one. delete delete The method of claim 1, The timing controller; A control signal generator for generating a control signal for controlling the gate and the data driver by dividing a frame synchronization signal including a vertical synchronization signal corresponding to a first frame frequency from the outside into a second frame frequency; And a data converter configured to convert the input data into the double frame data, modulate the gamma characteristic of the double frame data on a frame-by-frame basis, or supply the double frame data to the data driver according to a logic state of the image mode. The driving device of the video display device, characterized in that. 5. The method of claim 4, Wherein the data conversion unit comprises: A double frame generation unit converting the input data into the double frame data; The double frame data is inverted by high gamma or low gamma on a frame-by-frame basis in accordance with the logic state of the image mode and the two-divided vertical synchronization signal and supplied to the data driver, or only the subtitle data of the double frame data is the high gamma. Or a modulator for inverting the row gamma to the data driver or supplying the double frame data corresponding to the reference gamma to the data driver as it is. 6. The method of claim 5, The modulator; A first selector configured to select and output the double frame data supplied from the double frame generator according to a logic state of the image mode; A frame signal generator for generating a frame signal of a high state corresponding to the Nth frame or a frame signal of a low state corresponding to the N + 1th frame by using the two divided vertical synchronization signals; A first lookup table including high gamma data corresponding to the high gamma; A second lookup table including row gamma data corresponding to the row gamma; A first image mode data modulator for modulating the double frame data selected by the first selector according to the image mode of the first logic state into the high gamma data or the low gamma data according to the frame synchronization signal; ; Second image mode data modulation for modulating the caption data of the double frame data selected by the first selector according to the image mode of the second logical state into the high gamma data or the low gamma data according to the frame synchronization signal; Wealth; A third delaying of the double frame data selected by the first selector according to the image mode of the third logic state by a time corresponding to a time for modulating the data by the first or second image mode data modulator; An image mode data modulator; And a data output unit for outputting data from any one of the first to third image mode data modulators to the data driver. The method of claim 6, The first image mode data modulator; A second selector which selects and outputs the double frame data according to the frame signal; A first data modulator for modulating the double frame data selected by the second selector according to the high state frame signal to correspond to the high gamma data provided from the first lookup table and supplying the data to the data output unit Wow, A second data modulator for modulating the double frame data selected by the second selector to correspond to the low gamma data provided from the second lookup table according to the low frame signal and supplying the double frame data to the data output unit; Driving apparatus for a video display device, characterized in that comprising a. The method of claim 6, The second image mode data modulator; A frame memory for storing the double frame data in frame units; A caption data detector for comparing a current double frame data with previous double frame data from the frame memory to generate a caption signal corresponding to the presence or absence of caption data; A third selector for selecting and outputting the double frame data according to the caption signal; A fourth selector which selects and outputs subtitle data of the double frame data according to the frame synchronization signal; A subtitle data of the double frame data selected by the fourth selector according to the frame synchronization signal of the high state is modulated to correspond to the high gamma data provided from the first lookup table and supplied to the data output unit; 1 subtitle data modulation section, Modulating the caption data of the double frame data selected by the fourth selector according to the frame synchronization signal of the low state to correspond to the low gamma data provided from the second lookup table and supplying the subtitle data to the data output unit; A caption data modulator; And a delay unit configured to delay the double frame data selected by the third selection unit and supply the delayed double frame data to the data output unit by a time corresponding to the time when the first or second subtitle data modulation unit modulates the subtitle data. Drive of the video display device, characterized in that. 5. The method of claim 4, Wherein the data conversion unit comprises: A double frame generation unit converting the input data into the double frame data; The odd and even data of the double frame data are inverted to high gamma or low gamma and supplied to the data driver in the frame unit according to the logic state of the image mode and the two divided vertical synchronization signals, or the odd number of the double frame data. And a modulator for inverting only even subtitle data into the high gamma or the low gamma to be supplied to the data driver or to supply the double frame data corresponding to the reference gamma to the data driver as it is. Drive of display device. The method of claim 9, The modulator; A first selector configured to select and output the double frame data supplied from the double frame generator according to a logic state of the image mode; A frame signal generator for generating a frame signal of a high state corresponding to the Nth frame or a frame signal of a low state corresponding to the N + 1th frame by using the two divided vertical synchronization signals; A first lookup table including high gamma data corresponding to the high gamma; A second lookup table including row gamma data corresponding to the row gamma; A first image mode for modulating the odd and even data of the double frame data selected by the first selector according to the image mode of the first logic state into the high gamma data or the low gamma data according to the frame synchronization signal; A data modulator; A second image for modulating the odd and even subtitle data of the double frame data selected by the first selector according to the image mode of the second logic state into the high gamma data or the low gamma data according to the frame synchronization signal; A mode data modulator; The double frame data selected by the first selector is divided into odd and even data according to the image mode of the third logic state, and corresponds to a time for modulating the data by the first or second image mode data modulator. A third image mode data modulator for delaying the time delayed by a predetermined time; And a data output unit configured to output odd and even data from any one of the first to third image mode data modulators to the data driver. 11. The method of claim 10, The first image mode data modulator; A first data separator for separating the double frame data into the odd data and the even data; A second selector which selects and outputs odd data from the first data separator according to the frame signal; A third selector which selects and outputs even data from the first data separator according to the frame signal; Modulating the odd data selected by the second selector according to the frame signal in the high state to correspond to the high gamma data provided from the first lookup table, or selecting the third according to the frame signal in the low state A first data modulator for modulating the even data selected by the unit to correspond to the high gamma data and supplying the modulated data to the data output unit; Modulate the even data selected by the third selector according to the high frame signal to correspond to the low gamma data provided from the second lookup table, or the second data according to the low frame signal And a second data modulator for modulating the odd data selected by the selector to correspond to the low gamma data and supplying the data to the data output unit. 11. The method of claim 10, The second image mode data modulator; A frame memory for storing the double frame data in frame units; A caption data detection unit configured to compare current double frame data with previous double frame data from the frame memory and generate a high or low state caption signal corresponding to the presence or absence of caption data; A second data separator for separating the double frame data into the odd data and the even data; Odd and even data of the double frame data supplied from the second data separator are selected and output according to the high caption signal or odd caption data and even caption data of the double frame data according to the low caption signal. A fourth selector which selects and outputs a; A fifth selector for selecting and outputting odd subtitle data of the double frame data selected by the fourth selector according to the frame synchronization signal; A fifth selector for selecting and outputting even-caption data of the double frame data selected by the fourth selector according to the frame synchronization signal; Modulating the odd caption data selected by the fifth selector according to the frame signal in the high state to correspond to the high gamma data provided from the first lookup table, or in response to the frame signal in the low state; A first caption data modulator for modulating the even caption data selected by the selector to correspond to the high gamma data and supplying the caption data to the data output unit; Modulating the even caption data selected by the sixth selector according to the high state frame signal to correspond to the low gamma data provided from the second lookup table, or the fifth subtitle data according to the low state frame signal. A second caption data modulator for modulating the odd caption data selected by the selector to correspond to the low gamma data and supplying the caption data to the data output unit; Delaying odd and even data of the double frame data selected by the fourth selection unit to supply the data output unit to the data output unit by a time corresponding to the time when the first or second subtitle data modulation unit modulates the subtitle data. Driving device of a video display device comprising a delay unit. The method of claim 6 or 10, The high gamma data is set such that the ratio of the output gray level to the input gray level decreases as the input gray level increases below the first reference gray value, and the output gray level is set to have the maximum gray level value above the first reference gray value. Driving apparatus for a video display device characterized in that the gamma curve. The method of claim 6 or 10, The low gamma data is set so that an output gray level has a minimum gray level value below a second reference gray value, and a ratio of an output gray level to an input gray level increases as the input gray level increases above the second reference gray value. Driving apparatus for a video display device characterized in that the gamma curve. The method of claim 6 or 10, And the reference gamma is a reference gamma curve set to have an intermediate gray level between the high gamma and the low gamma. A video display device comprising pixel cells formed for each region defined by a plurality of gate lines and a plurality of data lines; Converting one frame of input data into the same double frame data, and modulating a gamma characteristic of the double frame data on a frame-by-frame basis or outputting the double frame data as it is according to the image mode of the input data; Supplying a scan pulse to each subpixel; Converting the data supplied from the first step into an image signal and supplying the data line to the data line so as to be synchronized with the scan pulse; The image mode may be any one of a first logical state corresponding to a DVD (Digital Versatile Disc) / movie, a second logical state corresponding to a television image, and a third logical state corresponding to a monitor image of a computer according to a user's setting. A method of driving an image display device, characterized in that set to one. delete 17. The method of claim 16, In the first step, 1-1 step of dividing the frame synchronization signal including the vertical synchronization signal corresponding to the first frame frequency input from the outside into the second frame frequency by two; Converting the input data into the double frame data and modulating the gamma characteristic of the double frame data on a frame-by-frame basis or outputting the double frame data as it is in accordance with a logic state of the image mode and the divided bidirectional vertical synchronization signal; A method of driving an image display device, comprising the steps 1-2. The method of claim 18, The first 1-2 steps; A step 1-2-1 of converting the input data into the double frame data; Invert the double frame data to high gamma or low gamma on a frame-by-frame basis in accordance with the logic state of the image mode and the two-divided vertical synchronization signal, or only subtitle data of the double frame data to the high gamma or low gamma. And a step 1-2-2 of inverting or outputting the double frame data corresponding to the reference gamma as it is. 20. The method of claim 19, The first step 1-2-2; Selecting and outputting the double frame data according to a logic state of the video mode; Generating a frame signal having a high state corresponding to the Nth frame or a frame signal having a low state corresponding to the N + 1th frame using the two divided vertical synchronization signals; A first image mode data modulation step of modulating the double frame data selected according to the image mode of the first logic state to correspond to the high gamma or the low gamma according to the frame synchronization signal; A second image mode data modulation step of modulating caption data of the double frame data selected according to the image mode of the second logic state to correspond to the high gamma or the low gamma according to the frame synchronization signal; A third image mode data modulation step of delaying the double frame data selected according to the image mode of the third logical state by a time corresponding to a time for modulating the double frame data or the caption data of the double frame data; And outputting data from any one of the first to third image mode data modulation steps. 21. The method of claim 20, The first image mode data modulation step may include; Modulating the double frame data to correspond to the high gamma according to the frame signal in the high state; And modulating the double frame data to correspond to the low gamma according to the frame signal in the low state. 21. The method of claim 20, The second image mode data modulation step may include; Storing the double frame data in a frame memory on a frame-by-frame basis; Comparing the current double frame data with previous double frame data from the frame memory to generate a high or low state subtitle signal corresponding to the presence or absence of the subtitle data; Selecting the double frame data according to the high caption signal or selecting the caption data of the double frame data according to the low caption signal; Modulating the caption data of the double frame data selected by the low caption signal according to the high frame sync signal to correspond to the high gamma; Modulating the caption data of the double frame data selected by the row caption signal to correspond to the row gamma according to the row synchronization frame signal; And delaying the double frame data selected by the high caption signal by a time corresponding to a time for modulating the caption data. The method of claim 18, The first 1-2 steps; A step 1-2-1 of converting the input data into the double frame data; Inverts odd and even data of the double frame data to high gamma or low gamma on a frame-by-frame basis according to the logic state of the image mode and the two-divided vertical synchronization signal, or only odd and even subtitle data of the double frame data. And inverting the high gamma or the low gamma or outputting the double frame data corresponding to the reference gamma as it is. 24. The method of claim 23, The first step 1-2-2; Selecting the double frame data according to a logic state of the picture mode; Generating a frame signal having a high state corresponding to the Nth frame or a frame signal having a low state corresponding to the N + 1th frame using the two divided vertical synchronization signals; A first image mode data modulation step of modulating the odd and even data of the double frame data selected according to the image mode of the first logic state to correspond to the high gamma or the low gamma according to the frame synchronization signal; A second image mode data modulation step of modulating the odd and even subtitle data of the double frame data selected according to the image mode of the second logic state to correspond to the high gamma or the low gamma according to the frame synchronization signal; A third delaying the double frame data selected according to the image mode of the third logic state into odd and even data and delaying the double frame data by a time corresponding to the time for modulating the data in the first or second image mode data modulator; Image mode data modulation step; And outputting odd and even data from any one of the first to third image mode data modulation steps. 25. The method of claim 24, The first image mode data modulation step may include; Dividing the double frame data into the odd data and the even data; Modulating the odd data to correspond to the high gamma and the even data to correspond to the low gamma according to the frame signal in the high state; And modulating the odd data to correspond to the low gamma according to the frame signal in the low state and simultaneously modulating the even data to correspond to the high gamma. 25. The method of claim 24, The second image mode data modulation step may include; Storing the double frame data in a frame memory on a frame-by-frame basis; Comparing the current double frame data with previous double frame data from the frame memory to generate a high or low state subtitle signal corresponding to the presence or absence of the subtitle data; Dividing the double frame data into the odd data and the even data; Selecting odd and even data of the double frame data according to the high caption signal or selecting odd and even caption data of the double frame data according to the low caption signal; Modulating the odd subtitle data to correspond to the high gamma and the even subtitle data to correspond to the low gamma according to the high frame signal; Modulating the odd subtitle data to correspond to the low gamma and the even subtitle data to correspond to the high gamma according to the frame signal in the low state; And delaying the odd and even data of the double frame data selected by the high-captioned subtitle signal by a time corresponding to the time for modulating the subtitle data. The method of claim 20 or 24, The high gamma is set such that the ratio of the output gray level to the input gray level decreases as the input gray level increases below the first reference gray level value, and the high gamma set such that the output gray level has the maximum gray level value above the first reference gray level value. A driving method of an image display device comprising a curve. The method of claim 20 or 24, The low gamma is set so that an output gray level has a minimum gray value below the second reference gray value, and above the second reference gray value, the low gamma is set such that the ratio of the output gray level to the input gray level increases as the input gray level increases. A driving method of an image display device comprising a curve. The method of claim 20 or 24, And the reference gamma comprises a reference gamma curve set to have an intermediate gray level value between the high gamma and the low gamma.

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