KR100581803B1 - Flat panel display and driving method thereof - Google Patents

Abstract

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a flat panel display and a driving method thereof capable of expressing high resolution with a display panel having the same resolution.

According to an exemplary embodiment of the present invention, a flat panel display includes an image display unit for displaying an image by a combination of data signals supplied to at least three subpixels through a data line, and data signals of at least three subframes in one frame to the subpixel. And a controller for supplying a data signal to the data driver so that the image is displayed by a combination of a data driver for supplying and data signals supplied to at least three subpixels different from each other in the at least three subframes.

By such a configuration, the present invention can express at least three times higher resolution images in an image display section having a constant resolution.

Description

Flat panel display and driving method {FLAT PANEL DISPLAY AND DRIVING METHOD THEREOF}             

1 is a view showing a conventional flat panel display.

FIG. 3 is a diagram illustrating a sequence of data signals in the subpixels shown in FIG. 1. FIG.

3 is a diagram illustrating a flat panel display device according to an exemplary embodiment of the present invention.

FIG. 4 is a diagram showing a sequence of data signals supplied to the subpixels shown in FIG. 3 during the first to third subframes of one frame. FIG.

FIG. 5 illustrates the image processor shown in FIG.

FIG. 6 is a waveform diagram showing driving timing of the image display unit shown in FIG. 3; FIG.

FIG. 7A is a diagram showing the data order of the first subframe shown in FIGS. 4 and 6;

FIG. 7B is a diagram showing the data order of the second subframe shown in FIGS. 4 and 6;

FIG. 7C is a diagram showing the data order of the third subframe shown in FIGS. 4 and 6;

<Explanation of symbols for the main parts of the drawings>

10, 110: display panel 12, 112: image display unit

14, 114: pixel 14R, 114R: red subpixel

14G, 114G: Green subpixel 14B, 114B: Blue subpixel

20, 120: scan driver 30, 130: data driver

40, 140: controller 42, 142; Control

43, 143: power generation unit 144: image processor

150: data reordering unit 152: frame buffer

154, 156: frame memory

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a flat panel display, and more particularly, to a flat panel display and a driving method thereof capable of displaying high resolution with a display panel having the same resolution.

Recently, various flat panel displays have been developed to reduce weight and volume, which are disadvantages of cathode ray tubes. The flat panel display includes a liquid crystal display, a field emission display, a plasma display panel, a light emitting display, and the like.

Referring to FIG. 1, a conventional flat panel display includes a display panel 10 for displaying an image and a controller 40 for supplying a control signal and a data signal to the display panel 10.

As illustrated in FIG. 2, the display panel 10 includes sub-pixels 14R, 14G, and red (R), green (G), and blue (B) formed at the intersection of the data line DL and the scan line SL. Image display unit 12 including a plurality of pixels 14 having 14B, and subpixels 14R, 14G, and 14B of red (R), green (G), and blue (B) of image display unit 12. Data is supplied to the scan driver 20 for supplying a selection signal for selecting each, and the subpixels 14R, 14G, and 14B of red (R), green (G), and blue (B) of the image display unit 12, respectively. A data driver 30 for supplying a signal is provided.

The image display unit 12 includes subpixels 14R, 14G, and 14B of red (R), green (G), and blue (B). Each of the red (R), green (G), and blue (B) subpixels 14R, 14G, 14B is connected to the data line DL. Each of the subpixels 14R, 14G, and 14B of red (R), green (G), and blue (B) is selected by a scan signal applied to the scan line SL, and a data signal supplied to the data line DL. The image corresponding to the is displayed. At this time, the image display unit 12 has a resolution corresponding to the number of data lines DL / 3 and the number of scanning lines SL.

The scan driver 20 generates a scan signal for sequentially driving the scan lines SL in response to the scan control signals, that is, the start pulse and the clock signal, from the controller 40 and sequentially supplies the scan signals to the scan lines SL. .

The data driver 30 transmits a data signal from the controller 40 through the data line DL to the red (R), green (G), and blue (B) signals in response to the data control signals supplied from the controller 40. To each of the subpixels 14R, 14G, and 14B. In this case, the data driver 30 supplies one horizontal line of data signals to the data lines DL every one horizontal period.

The controller 40 includes a controller 42 and a power generator 43 for supplying driving power to the display panel 10. Here, the controller 40 may be directly connected to a pad unit (not shown) provided on one side of the display panel 10 or through an interface member (not shown).

The controller 42 supplies the scan control signals for controlling the driving timing of the driver 20 to the scan driver 20 and the data control signals for controlling the driving timing of the data driver 20. To feed. In addition, as shown in FIG. 2, the control unit 42 outputs data signals from the outside to correspond to the resolution of the image display unit 12. 14G and 14B) and are arranged in units (RGBRGBRGB ...) and supplied to the data driver 30. In addition, the controller 42 supplies a driving signal for driving the power generator 43 to the power generator 43.

The power generator 43 generates voltages necessary for driving the display panel 10 according to the driving signal supplied from the controller 42 and supplies the generated voltages to the display panel 10.

Such a conventional flat panel display device supplies a data signal in accordance with the resolution of the image display unit 12, so that an image corresponding to the resolution of the determined image display unit 12 is displayed. As a result, the conventional flat panel display apparatus expresses a resolution determined according to the number of data lines DL and the number of scanning lines SL of the image display unit 12, and thus cannot display a higher resolution than the predetermined resolution.

Accordingly, an object of the present invention is to provide a flat panel display device and a driving method thereof capable of expressing a high resolution with a display panel having the same resolution.

In order to achieve the above object, a flat panel display according to an embodiment of the present invention is an image display unit for displaying an image by a combination of data signals supplied to at least three sub-pixels through a data line, and at least three during one frame. A data driver for supplying a data signal of a subframe to the subpixel and a data signal supplied to the at least three subpixels for each of the at least three subframes so that the image is displayed. And a controller for supplying a signal.

In the flat panel display, the controller is configured to control the data signals from the outside in the order of red, green and blue data signals, and to arrange the aligned data signals from the controllers in the at least three subframes. And image processors arranged in order.

In the flat panel display, the image processor may further include a data rearranging unit configured to rearrange the aligned data signals in order of different data signals for each of the at least three subframes, and the data signals rearranged by the data rearranging unit on a frame basis. And a frame buffer for storing the data and outputting the same to the data driver.

In the flat panel display, the data rearranging unit rearranges the data signals arranged in the order of the red, green, and blue data signals from the controller so as to be repeated in the order of the red, green, and blue data signals. The data signal of one subframe is set, and the data signals arranged in the order of the red, green, and blue data signals from the controller are rearranged to be repeated in the order of the green, blue, and red data signals. The data signal of the second subframe is set, and the data signals arranged in the order of the red, green, and blue data signals from the control unit are rearranged to be repeated in the order of the blue, red, and green data signals, so as to repeat the at least three subframes. The data signal of the third subframe is set.

In the flat panel display, the data signal of the first subframe is displayed on the full screen of the image display unit, and the data signal of the second subframe is the full screen except for the subpixel connected to the first data line of the image display unit. And a data signal of the third sub-frame is displayed on the full screen except for the sub-pixels connected to the first and second data lines of the image display unit, and the order of the data lines is arranged on the image display unit. Determined in subpixel units.

A driving method of a flat panel display device according to an embodiment of the present invention is a flat panel display device having an image display unit for displaying an image by a combination of data signals supplied to at least three subpixels through a data line, wherein at least three subs are provided. A first step of generating data signals supplied to at least three different subpixels for each frame; and a second step of displaying the image by supplying the data signals of the at least three subframes to the subpixels for one frame; Include.

In the method of driving the flat panel display, the first step includes: arranging data signals from the outside in the order of red, green, and blue data signals; and differently aligning the aligned data signals for each of the at least three subframes. Reordering the data signals.

The rearranging of the flat panel display may include rearranging the aligned data signals in order of different data signals for each of the at least three subframes, and storing the rearranged data signals in units of frames. Outputting to the subpixel.

The rearranging of the flat panel display may include rearranging the data signals arranged in the order of the red, green, and blue data signals in order of the red, green, and blue data signals. A second one of the at least three subframes by setting the data signal of the first subframe and rearranging the data signals arranged in the order of the red, green, and blue data signals to be repeated in the order of the green, blue, and red data signals. A third sub-frame among the at least three subframes by setting a data signal of a subframe and rearranging the data signals arranged in the order of the red, green, and blue data signals to be repeated in the order of the blue, red, and green data signals. Set to the data signal of the frame.

In the driving method of the flat panel display device, the data signal of the first subframe is displayed on the full screen of the image display unit, and the data signal of the second subframe is connected to the subpixel connected to the first data line of the image display unit. The data signal of the third sub-frame is displayed on the full screen except for the sub-pixels connected to the first and second data lines of the image display unit, and the order of the data lines is on the image display unit. It is determined by the subpixel units arranged in.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to FIGS. 3 to 7C which are attached to the most preferred embodiments that can easily carry out the present invention.

Referring to FIG. 3, a flat panel display according to an exemplary embodiment of the present invention includes an image display unit 112 for displaying an image by a combination of data signals supplied to at least three subpixels 114R, 114G, and 114B. The data signal is supplied to the image display unit 12 so that an image is displayed by a combination of the display panel 110 and the data signals supplied to at least three subpixels 114R, 114G, and 114B which are different for at least three subframes. The controller 140 is provided.

As illustrated in FIG. 3, the display panel 110 includes subpixels 114R, 114G, and red (R), green (G), and blue (B) formed at the intersection of the data line DL and the scan line SL. Image display unit 112 including a plurality of pixels 114 having 114B, and subpixels 114R, 114G, and 114B of red (R), green (G), and blue (B) of image display unit 112. A scan driver 120 for supplying a selection signal for selecting each and a sub-pixel 114R, 114G of red (R), green (G), and blue (B) data signals of at least three subframes during one frame; And a data driver 130 for supplying each of them.

The image display unit 112 includes subpixels 114R, 114G, and 114B of red (R), green (G), and blue (B). The red (R), green (G), and blue (B) subpixels 114R, 114G, 114B are connected to respective data lines DL connected to the respective subpixels.
That is, the data lines DL are connected to the subpixels 114R, 114G, and 114B of the red (R), green (G), and blue (B), respectively, and the order of the data lines DL is an image. The sub-pixel units arranged on the display unit 112 are determined. Accordingly, as an example, the first data line is connected to the red subpixel 114R shown in FIG. 3, the second data line is connected to the green subpixel 114G, and the third data line is connected to the blue subpixel 114B. Is connected to.
In addition, each of the sub-pixels 114R, 114G, and 114B of red (R), green (G), and blue (B) is selected by a scan signal applied to the scan line SL, and is supplied to the data line DL. An image corresponding to the data signal to be displayed is displayed.

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The controller 140 controls the controller 142, the image processor 144 for rearranging the aligned and supplied data signals supplied from the controller 142 to the data driver 130, and the display panel 110. A power generating unit 143 for supplying power is provided. Here, the controller 140 may be directly connected to the pad unit provided on one side of the display panel 110 or through an interface member (not shown).

The controller 142 supplies the scan control signals for controlling the driving timing of the scan driver 120 to the scan driver 120, and the data control signals for controlling the driving timing of the data driver 120. Supplies). In addition, the controller 142 arranges the data signals supplied from the outside so as to correspond to the resolution of the image display unit 112, and supplies the aligned data signals to the image processor 144. That is, as shown in FIG. 4, the controller 142 transmits data signals from the outside to the sub-pixel 114R of red (R), green (G), and blue (B) so as to correspond to the resolution of the image display unit 112. , 114G, 114B), and are supplied to the image processor 144 in the unit of RGBRGBRGB .... In addition, the controller 142 supplies a driving signal for driving the power generator 143 to the power generator 143.

The power generator 143 generates voltages necessary for driving the display panel 110 according to a driving signal supplied from the controller 142 and supplies the generated voltages to the display panel 110.

As illustrated in FIG. 5, the image processor 143 may include a data rearranging unit 150 that rearranges the aligned data signal data from the control unit 142 in units of frames, and a rearrangement from the data rearranging unit 150. The frame buffer 152 stores the data signal Mdata and outputs the same to the data driver 130.

As illustrated in FIG. 4, the data rearranging unit 150 receives the aligned data signal data in units of frames, which are aligned and supplied from the controller 142, during the first to third subframe data signals Mdata1 and Mdata2. , Mdata3). In this case, two sub-pixels 114G and 114B and a K + 1 pixel 114 of the K-th pixel (where K is a positive integer of 1 or more) based on the first sub-frame data signal Mdata1. The first sub-frame data signal Mdata1 is rearranged to generate the second sub-frame data signal Mdata2 so that one pixel 114 is constituted by the combination of one subpixel 114R of the subpixel 114R. In addition, the data alignment unit 150 includes one subpixel 114B and the K th pixel of the K th pixel (where K is a positive integer of 1 or more) based on the first sub frame data signal Mdata1. The third subframe data signal Mdata3 is rearranged by rearranging the first subframe data signal Mdata1 such that one pixel 114 is formed by a combination of two subpixels 114R and 114G of the +1 pixel 114. Occurs.

In detail, the data rearranging unit 150 supplies the first subframe data signal Mdata1 of the one frame to the frame buffer 152 as it is. The second sub-frame data signal Mdata2 of one frame is the green (G) and the blue (B) except for the first red subpixel 114R in the aligned data signal data that is aligned and supplied from the controller 142. ) And the data signal data are rearranged in units of the subpixels 114G, 114B, and 114R of the red color R and supplied to the frame buffer 152. In addition, the data reordering unit 150 may include the first red sub-pixel 114R and the first first sub-data data Mdata3 in the aligned data signal data that is aligned and supplied from the controller 142. Except for the green subpixel 114G, the data signal data is rearranged in units of blue (B), red (R), and green (G) subpixels 114B, 114R, and 114G to the frame buffer 152. Supply. As a result, the first subframe data signal Mdata1 of one frame is rearranged from the first data line DL1 in the order of "RGBRGBRGB ..." and supplied to the frame buffer 152, and the second subframe data signal ( Mdata2 is rearranged in order of "XGBRGBRGBR ..." and supplied to the frame buffer 152, and the third subframe data signal Mdata3 is rearranged in order of "XXBRGBRGBRG ..." and supplied to the frame buffer 152. .

The frame buffer 152 is composed of first and second frame memories 154 and 156. Each of the first and second frame memories 154 and 156 alternately supplies the first to third subframe data signals Mdata1, Mdata2, and Mdata3 rearranged from the data alignment unit 150, and at the same time, the data driver 130. Will be printed. That is, after the first sub frame data signal Mdata1 is stored in the first frame memory 154, the second sub frame data signal Mdata2 is stored in the second frame memory 156 and the first frame memory 154. The first sub frame data signal Mdata1 stored in) is supplied to the data driver 130. Similarly, the second sub frame data signal Mdata2 stored in the second frame memory 156 is supplied to the data driver 130 and the third sub frame data signal Mdata3 is stored in the first frame memory 154. . As described above, the first and second frame memories 154 and 156 alternately supply the first to third subframe data signals Mdata1, Mdata2, and Mdata3 to the data driver 130. do.

The scan driver 120 generates a scan signal for sequentially driving the scan lines SL from the controller 140 in response to the scan control signals, that is, the start pulse and the clock signal, and sequentially supplies the scan signals to the scan lines SL. .

The data driver 130 may output data signals Mdata1, Mdata2, and Mdata3 of the first to third subframes from the image processor 144 of the controller 140 in response to data control signals supplied from the controller 140. It supplies to the image display part 112 via the data line DL. In this case, the data driver 130 supplies data signals of one horizontal line to the data lines DL every one horizontal period.

As described above, the flat panel display and the driving method thereof according to an exemplary embodiment of the present invention divide one frame into first to third subframes SF1, SF2, and SF3 as shown in FIG. In SF1, the data signal Mdata1 of the first subframe is supplied to the data lines DL so as to be synchronized with the scan signals sequentially supplied to the scan lines SL1 to SLn of the image display unit 112. Accordingly, on the image display unit 112, in the first sub frame section SF1 of one frame, the image is displayed on the full screen of the image display unit 112 by the data signal Mdata1 of the first sub frame as shown in FIG. 7A. Is displayed.

Subsequently, in the second sub frame section SF2, the data lines DL of the data signal Mdata2 of the second subframe are synchronized with the scan signals sequentially supplied to the scan lines SL1 through SLn of the image display unit 112. To feed. Accordingly, on the image display unit 112, in the second sub frame section SF2 of one frame, the first data line of the image display unit 112 by the data signal Mdata1 of the second sub frame as shown in FIG. 7B. An image is displayed on the full screen except for (DL1). In the second sub frame section SF2, an image between adjacent pixels 114 displayed on the image display unit 112 may be displayed in the first sub frame section SF1.
In this case, the order of the data lines DL is determined in units of subpixels arranged on the image display unit 112. Therefore, the first data line DL1 is a sub-form formed at the rightmost side of the image display unit 112. It becomes a data line connected to a pixel.

In the third sub frame section SF3, the data signal Mdata3 of the third subframe is transferred to the data lines DL so as to be synchronized with the scan signal sequentially supplied to the scan lines SL1 to SLn of the image display unit 112. Supply. Accordingly, in the third sub frame section SF3 of one frame on the image display unit 112, the first and the first and the second images of the image display unit 112 are controlled by the data signal Mdata3 of the third subframe, as shown in FIG. 7C. The image is displayed on the full screen except the two data lines DL1 and DL2. In the third sub frame section SF3, an image between adjacent pixels 114 displayed on the image display unit 112 may be displayed in the second sub frame section SF2.

Such a flat panel display and a driving method thereof according to an embodiment of the present invention are the first to third displayed on the image display unit 112 in the first to third sub-frame period (SF1, SF2, SF3) of one frame Images corresponding to the data signals Mdata1, Mdata2, and Mdata3 of the subframe display a high resolution three times higher than the inherent resolution of the image display unit 112. FIG. That is, the present invention can display at least three times the high resolution image by the image display unit having a constant resolution by displaying the image by a combination of data signals supplied to at least three subpixels different from each other at least three subframes.

Accordingly, the flat panel display and the driving method thereof according to the embodiment of the present invention express the grayscale three times in detail by changing the combination of data signals supplied to the pixels 114 of the image display unit 112 having a constant resolution. The image can be expressed. Such a flat panel display and a driving method thereof according to an embodiment of the present invention, when displaying the image on the image display unit 112 by using at least three sub-frames for one frame to express the grayscale three times or more finely high resolution Can express an image.

The above detailed description and drawings are merely exemplary of the present invention, which are used only for the purpose of illustrating the present invention and are not intended to limit the scope of the present invention as defined in the claims or claims. Therefore, 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 protection scope of the present invention should not be limited to the contents described in the detailed description of the specification but should be defined by the claims.

As described above, the flat panel display and the driving method thereof according to an exemplary embodiment of the present invention provide at least three subframe data signals corresponding to pixels differently configured in units of at least three subframes. By displaying on the image display unit during a frame, it is possible to express an image having a higher resolution than the resolution inherent in the image display unit. Further, the present invention can express an image of higher resolution than the resolution inherent in the image display unit by displaying an image for one frame by using at least three sub frame data signals from which a part of the previous sub frame data signal has been removed. Therefore, the present invention can express at least three times higher resolution images with an image display unit having a constant resolution.

Claims (10)

An image display unit for displaying an image by a combination of data signals supplied to at least three subpixels via a data line; A data driver for supplying data signals of at least three subframes to the subpixels during one frame; And a controller configured to supply a data signal to the data driver so that the image is displayed by a combination of data signals supplied to at least three subpixels that are different for each of the at least three subframes. The method of claim 1, The controller, A controller for arranging data signals from the outside in order of red, green, and blue data signals; And an image processor for rearranging the aligned data signals from the controller in the order of different data signals for each of the at least three subframes. The method of claim 2, The image processor, A data rearranging unit for rearranging the aligned data signals in order of different data signals for each of the at least three subframes; And a frame buffer for storing the data signals rearranged by the data rearranging unit in units of frames and outputting the data signals to the data driver. The method of claim 3, wherein The data rearranging unit; The data signals arranged in the order of the red, green, and blue data signals from the controller are rearranged to be repeated in the order of the red, green, and blue data signals, and set as the data signals of the first subframe of the at least three subframes. , The data signals arranged in the order of the red, green, and blue data signals from the control unit are rearranged to be repeated in the order of the green, blue, and red data signals, and set as the data signals of the second sub-frame among the at least three sub-frames. , The data signals arranged in the order of the red, green, and blue data signals from the controller are rearranged to be repeated in the order of the blue, red, and green data signals, and set as the data signals of the third subframes of the at least three subframes. Flat panel display. The method of claim 4, wherein The data signal of the first sub frame is displayed on the full screen of the image display unit, The data signal of the second sub frame is displayed on the full screen except for the sub-pixel connected to the first data line of the image display unit, The data signal of the third subframe is displayed on the full screen except for the subpixels connected to the first and second data lines of the image display unit, And the data lines are arranged in sub-pixel units arranged on the image display unit. A flat panel display having an image display unit for displaying an image by a combination of data signals supplied to at least three subpixels via a data line, A first step of generating a data signal supplied to at least three subpixels different from each other by at least three subframes; And a second step of displaying the image by supplying data signals of the at least three subframes to the subpixels during one frame. The method of claim 6, The first step is, Arranging data signals from the outside in the order of red, green and blue data signals; And rearranging the sorted data signals in the order of different data signals for each of the at least three subframes. The method of claim 7, wherein The reordering step, Rearranging the aligned data signals in order of different data signals for each of the at least three subframes; And storing the rearranged data signals in frame units and outputting the rearranged data signals to the subpixels. The method of claim 8, The reordering step, The data signals arranged in the order of the red, green, and blue data signals are rearranged to be repeated in the order of the red, green, and blue data signals, and set as the data signals of the first subframe of the at least three subframes. The data signals arranged in the order of the red, green, and blue data signals are rearranged to be repeated in the order of the green, blue, and red data signals, and set as the data signals of the second subframe of the at least three subframes. A flat panel display for rearranging the data signals arranged in the order of the red, green, and blue data signals to be repeated in the order of the blue, red, and green data signals, and setting the data signals as the data signals of the third subframe among the at least three subframes. Driving method. The method of claim 9, The data signal of the first sub frame is displayed on the full screen of the image display unit, The data signal of the second sub frame is displayed on the full screen except for the sub-pixel connected to the first data line of the image display unit, The data signal of the third subframe is displayed on the full screen except for the subpixels connected to the first and second data lines of the image display unit, And the data lines are arranged in sub-pixel units arranged on the image display unit.

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