KR20040008260A - A Color Picture Display Apparatus and Method - Google Patents

Abstract

PURPOSE: An apparatus and a method for displaying color images are provided to double resolution in horizontal and vertical directions, thereby realizing high resolution display. CONSTITUTION: A field generator(111) samples digital video data signals by pixels in horizontal and vertical directions for generating a plurality of fields according to positions of pixels. A signal apply unit(112) differently applies video data signals of each field to the corresponding R, G, and B subpixels of a display unit(120) according to clock and synchronous signals. A signal applying delay unit(113) delays an applying point of the video data signal of a field set among the plurality of fields for a predetermined time. A signal calculator(114) calculates the mean of the delayed video data signal and the video data signal of another field for outputting a new video data signal. The display unit displays color images, wherein the number of pixels of the display unit is smaller than the number of pixels of image data to be displayed.

Description

Color image display device and method {A Color Picture Display Apparatus and Method}

The present invention relates to a color image display apparatus and method, and more particularly, to display a color image received from an external device on a color display device, wherein the plurality of pixel-specific digital image data signals constituting one frame are displayed. The pixels are divided into a plurality of fields according to the position of each pixel in the horizontal direction and the vertical direction, and the image data signals are applied to different subpixels of the color display device for each of the fields, whereby The present invention also provides a color image display apparatus and method capable of realizing high resolution even in a color display apparatus having fewer pixels.

In general, there are various kinds of display devices for displaying color images such as PC monitors, color TVs, and color liquid crystal displays (LCDs). In particular, in recent years, the use of color liquid crystal displays (LCDs) is rapidly spreading due to excellent practicality. A color liquid crystal display (hereinafter referred to as LCD) is a technology used as a screen of a notebook or other small computers. The LCD operates on the principle of blocking light, not emitting light, and its driving voltage is several volts (V) to drive ICs, making it thinner than other display devices, and consumes more power than LEDs or plasma displays. It is suitable for use in portable small information communication terminal devices such as laptop or notebook type. Although it has a slow response, it has recently replaced monitors for thick CRT-type desktop computers, and has been increasingly used for TVs and airport flight boards.

As an example of a typical representative color display apparatus, a part of a pixel arrangement of a color LCD is shown in FIG. As shown in FIG. 1, a pixel array of a color LCD has an in-line array. In general, a scanning method for applying a signal also uses a sequential scanning method for a computer or a mobile terminal. In addition, in the case of a color LCD, each pixel 10 includes R, G, and B subpixels 11, 12, and 13. Therefore, the three subpixels 11, 12, and 13 determine the color of each pixel 10. By applying an appropriate data signal to each of the three subpixels R, G, and B, the desired color is displayed as a whole. will be. Referring to the structure of the color LCD shown in FIG. 1, the pixels 10 including three subpixels 11, 12, and 13 are repeatedly arranged in a horizontal direction to form a horizontal line, and the plurality of horizontal lines are in a vertical direction. It has a structure arranged repeatedly. In general, PC monitors, color TVs, and the like have different pixel shapes from those of color LCDs, but the pixel arrays are almost similar to those of color LCDs.

In the display device, the total number of pixels (pixels) in the horizontal and vertical directions of the panel determines the resolution of the screen. This resolution is a measure of how much information (text or picture) the display can contain, and the larger the number of pixels, the higher the resolution. In the conventional color LCD which is widely used at present, the limitation of the resolution that can be displayed in the mobile terminal or the mobile terminal has been limited by the physical limitation of the LCD, that is, the size of the screen and the number of pixels. Therefore, in order to display high resolution images and texts on a mobile phone or a mobile terminal, there is no method other than increasing the number of pixels arranged in the same screen size by increasing the screen size of the color LCD or decreasing the size of the pixels. However, increasing the screen size decreases portability and mobility, increases manufacturing cost and power consumption, and has technical limitations in reducing the size of pixels. Therefore, various information of a multifunctional mobile terminal or a mobile terminal can be displayed in high resolution. There was no problem.

As such, the horizontal and vertical resolutions are determined according to the physical screen size and the number of pixels of the conventional color LCD, and in order to display a high-resolution image outside this range, the image of one frame to be displayed is divided into several partial images, or Among the images to be displayed, only the pixels of some pixels were to be displayed. Particularly, the color LCD for graphic display, which has been used in a mobile terminal, has a small size and a small resolution that can be displayed. There is a problem that is impossible.

The present invention is proposed to solve the problem of resolution limitation in a display device having a small physical size of the panel or a small physical number of pixels as described above. According to the position of each pixel of the plurality of fields, and by applying the image data signal to each of the different sub-pixels of the display device for each field to apply the image data signal of all pixels to the display device to reference the same pixel To provide a color image display apparatus and method for increasing the horizontal and vertical resolution, respectively.

1 is a pixel arrangement diagram of a typical liquid crystal display (LCD).

2 is a functional block diagram of a color image display apparatus according to an embodiment of the present invention.

3 is a conceptual diagram illustrating a concept of dividing image data into four fields according to an embodiment of the present invention.

4 is a schematic diagram of a method of applying R, G, and B image data signals for each field of FIG. 4 according to an embodiment of the present invention.

FIG. 5 is a diagram illustrating a display shape of horizontal and vertical lines for each field in the display unit according to the signal application of FIG. 4.

7 is a flowchart illustrating a color image display method according to an embodiment of the present invention.

8 is a flowchart illustrating a color image display method according to another embodiment of the present invention.

Explanation of symbols on the main parts of the drawings

10: pixel 11,12,13: R, G, B subpixel

300: Original video data signal 310: F11 field

320: F12 field 330: F21 field

340: F22 field 110: control unit

111: field generating unit 112; Signal applicator

113: signal human branch delay 114: signal calculation unit

120: display unit 130: clock and synchronization signal generator

According to the present invention for achieving the above object, a pixel consisting of three subpixels of R, G, and B is repeatedly arranged in a horizontal direction to form a horizontal line, and the plurality of horizontal lines are repeated in a vertical direction. A color image display device including an arrayed display unit, comprising: sampling an image data signal of a pixel positioned in an odd number in the horizontal and vertical directions among a plurality of pixel image data signals constituting one frame to be displayed, and A field F11 is generated, and a second field F12 is generated by sampling an image data signal of a pixel which is even-numbered in the horizontal direction and odd-numbered in the vertical direction, and is located in the odd-numbered direction in the horizontal direction and in the vertical direction. A third field F21 is generated by sampling an image data signal of an even numbered pixel, and is positioned in an even number in the horizontal and vertical directions. A field generator for generating a fourth field (F22) samples the bovine image data signal; The pixel-specific image data signal of the N-th horizontal line of the first field F11 (where N is a natural number) is applied to the corresponding pixel from the first pixel of the N-th horizontal line of the display unit, and the second field ( The pixel-specific image data signal of the N-th horizontal line of F12 is applied to the corresponding pixel from the specific sub-pixel of the N-th horizontal line of the display unit, and the pixel-specific image of the N-th horizontal line of the third field F21 is applied. The data signal is applied to the corresponding pixel from the first pixel of the display unit, and the image data signal of one or two subpixels of the pixel-specific image data signal applies a signal of the image data of neighboring subpixels in the vertical direction. And applying the pixel-specific image data signal of the N-th horizontal line of the fourth field F22 to the corresponding pixel from the specific sub-pixel of the N-th horizontal line of the display unit. The image data signal of one or two subpixels of the call may include a signal applying unit for applying a signal of image data of neighboring subpixels in a vertical direction; A branch delay unit for delaying the application time of the image data signal of the N-th horizontal line of the specific field applied to the sub-pixel of the display unit by the signal applying unit for a specific time that can be adjusted; And an average value of the pixel-specific image data signal of the N-th horizontal line of the specific field whose application point is delayed by the signal delay branch and the pixel-specific image data signal of the N-th horizontal line of the field applied next by the signal applying unit. And a signal calculator for outputting each subpixel of the display unit. The display unit is preferably a color liquid crystal display (LCD).

The signal delay branch and the signal calculator respectively delay the application time of the image data signal of the N-th horizontal line of the first field F11 for a specific time, and the delay time of the application of the first field F11 is delayed. The average value of the subpixel image data signal of the Nth horizontal line and the subpixel image data signal of the Nth horizontal line of the second field F22 is calculated to correspond to the corresponding R, G, B of the Nth horizontal line of the display unit. Outputting to the subpixels, and delaying the application time of the subpixel image data signal of the Nth horizontal line of the third field F21 for a specific time, respectively, and the negative of the Nth horizontal line of the third field F21. An average value of the pixel-specific image data signal and the subpixel-specific image data signal of the Nth horizontal line of the fourth field F22 is calculated and output to the corresponding R, G, and B subpixels of the Nth horizontal line of the display unit.

Further, when the signal branch and the signal calculation unit is applied to the pixel-specific image data signal of the N-th horizontal line of the first field, the pixel-specific image data signal of the N-th horizontal line of the second field and Delaying the application time of the image data signal for each pixel of the N-th horizontal line of the third field until the application time of the image data signal for each pixel of the N-th horizontal line of the fourth field, respectively, Pixel-specific image data of the line, pixel-specific image data of the N-th horizontal line of the second field, pixel-specific image data of the N-th horizontal line of the third field, and pixel-specific image of the N-th horizontal line of the fourth field. A signal of image data for each pixel corresponding to an average value of the data is output to corresponding R, G, and B subpixels of the Nth horizontal line of the display unit.

In addition, the present invention for achieving the above object, a pixel consisting of three subpixels (R, G, B) is repeatedly arranged in a horizontal direction to form a horizontal line, a plurality of horizontal lines are in a vertical direction In a color image display method in a color display device arranged repeatedly, the image data signal of pixels positioned in an odd number in the horizontal and vertical directions of a plurality of pixel-specific digital image data signals constituting one frame to be displayed is removed. A video data signal of a pixel located in an even number in the horizontal direction and odd in the vertical direction in one field F11 is placed in an odd number in the horizontal direction and in an even number in the vertical direction in the second field F12. The image data signal of the pixel is divided into the third field F21, and the image data signal of the pixel positioned evenly in the horizontal and vertical directions is divided into the fourth field F22. Declassification step; A delay time of an application time of the image data signal for each pixel of the N-th horizontal line of the first field F11 applied to the corresponding pixel from the first pixel of the N-th horizontal line of the color display device for an adjustable time period; A delay phase being one signal; The image data signal for each pixel of the N-th horizontal line of the first field F11 delayed in the first signal delay step and the first pixel to be applied to a corresponding pixel from a specific sub-pixel of the N-th horizontal line of the color display device. A first signal applying step of calculating an average value of the digital image data signal for each pixel of the N-th horizontal line of the second field F12 and applying it to each of the R, G, and B subpixels of the color display device; The image data signals of the first or second sub-pixels among the image data signals of each pixel are applied to the corresponding pixels from the first pixel of the N-th horizontal line of the color display device. A delay step of delaying the application time of the digital image data signal for each pixel of the N-th horizontal line of the third field F21 to which the signal is applied during the specific time; And a pixel-specific image data signal of an N-th horizontal line of the third field F21 delayed in the second signal delay step and a corresponding pixel from a specific sub-pixel of the N-th horizontal line of the color display device. The image data signal of the first or second subpixel among the image data signals of each pixel is the pixel-specific digital image of the Nth horizontal line of the fourth field F22 that applies the image data signal of the neighboring subpixel in the vertical direction. And a second signal applying step of calculating an average value of the data signals and applying the R, G, and B subpixels of the color display device.

In addition, the present invention for achieving the above object, a pixel consisting of three subpixels (R, G, B) is repeatedly arranged in a horizontal direction to form a horizontal line, a plurality of horizontal lines are in a vertical direction In a color image display method in a color display device arranged repeatedly, the image data signal of pixels positioned in an odd number in the horizontal and vertical directions of a plurality of pixel-specific digital image data signals constituting one frame to be displayed is removed. A video data signal of a pixel located in an even number in the horizontal direction and odd in the vertical direction in one field F11 is placed in an odd number in the horizontal direction and in an even number in the vertical direction in the second field F12. The image data signal of the pixel is divided into the third field F21, and the image data signal of the pixel positioned evenly in the horizontal and vertical directions is divided into the fourth field F22. Declassification step; And a time point at which the digital image data signal for each pixel of the Nth horizontal line of the first field F11 is applied to the corresponding pixel from the first pixel of the Nth (N is a natural number) horizontal line of the color display device. A first signal delay step of delaying for one specific time; Delaying the application time of the digital image data signal for each pixel of the Nth horizontal line of the second field F12 applied to the corresponding pixel from the specific subpixel of the Nth horizontal line of the color display device for a second specific time period. A second signal delay step of causing; The image data signals of the first or second sub-pixels among the image data signals of each pixel are applied to the corresponding pixels from the first pixel of the N-th horizontal line of the color display device. A third signal delay step of delaying the application time of the digital image data signal for each pixel of the N-th horizontal line of the third field F21 to which the signal is applied for a third specific time; Applied to the pixel-specific digital image data signal of the N-th horizontal line of the first to third fields delayed in the first to third signal delay stages and to the corresponding pixel from the specific sub-pixel of the N-th horizontal line of the color display device. The image data signals of the first or second subpixels among the image data signals of each pixel are pixel-by-pixel of the N-th horizontal line of the fourth field F22 that applies the image data signals of neighboring subpixels in the vertical direction. And a signal applying step of calculating an average value of the digital image data signal and applying each subpixel of the color display device.

The present invention provides a color image display apparatus and method. According to the present invention, when displaying a high resolution image to be displayed on a display device having a relatively small number of pixels, all data signals of the high resolution image are applied to the display to display a high resolution image even on the display device having a small number of pixels. It becomes possible. To this end, the digital image data signal for each of the plurality of pixels transmitted from the outside by one frame is divided into a plurality of fields according to the position of each pixel in the horizontal and vertical directions, and the image data signal for each field is displayed in the display apparatus. The subpixels are sequentially applied to the corresponding subpixels, and the angular resolution is increased in the horizontal and vertical directions by applying image data signals to different subpixels for each field. According to the present invention, even when using a small display device, it is possible to display text or image information having a screen size of 4 to 9 times based on the same number of pixels. The above fields may be divided into 2 to 9 fields.

The above objects, features, and advantages will become more apparent from the following detailed description taken in conjunction with the accompanying drawings. Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

2 is a functional block diagram of a color image display apparatus according to an embodiment of the present invention. As shown in FIG. 2, the color image display apparatus 100 according to an exemplary embodiment of the present invention may include a controller 110 that controls to display an image to be displayed, and a display unit 120 that displays the image to be displayed. And a clock and synchronization signal generator 130 for generating a clock and horizontal and vertical synchronization signals to apply an image data signal to the controller 110. In more detail, the control unit 110 generates a plurality of fields by sampling a digital image data signal for each pixel to be displayed received from an external device according to a predetermined rule, and the image of each generated field. A signal applying unit 112 that applies a data signal to a corresponding pixel of the display unit 120 according to the clock and the synchronization signal, and delays the application time of the image data signal of a set field among the divided plurality of fields for a predetermined time. Calculating a mean value of the image data signal delayed by the signal branching unit 113 and the signal branching unit 113 and the image data signal of another field transmitted from the signal applying unit 112 and outputting a new image data signal. The signal calculator 114 is included. The display unit 120 is a variety of monitors capable of displaying a color image, in one embodiment of the present invention is preferably a liquid crystal display (LCD). Note that the number of pixels of the display unit 120 is smaller than the number of pixels of the image data to be displayed. In addition, the clock and sync signal generator 130 generates a horizontal sync signal or a vertical sync signal to display the image data to be displayed on the display unit 120 along a horizontal line or a vertical line. A clock for generating a signal to the display unit 120 is generated. The signal applying unit 112 classifies each field generated by the field generation unit 111 by using the vertical synchronization signal, the horizontal synchronization signal and the clock, and applies the corresponding image data signal to the display unit 120. In particular, one line in the horizontal direction of the display unit 120 is classified using a horizontal sync signal, and one frame of image data is classified using a vertical sync signal. The controller 110 may be implemented as computer software or as a program, and preferably as a microprocessor.

Referring to FIG. 2, the field generator 111 divides a plurality of fields according to positions of pixels in horizontal and vertical directions of image data signals for each pixel to be displayed. In one embodiment of the present invention, four fields F11, F12, F21, and F22 are preferably divided. The signal applying unit 112 applies differently to the corresponding R, G, and B subpixels of the display unit 120 for each of the divided fields. For example, the first field is applied to the R, G, and B subpixels of the display unit 120, and the second field is applied to the G, B, and R subpixels. The signal delay unit 113 delays the image data signal for each pixel of one or more specific fields applied by the signal applying unit 112 to the display unit 120 for a specific time. Here, the specific time is adjustable. In addition, the signal calculator 114 calculates an average value of the image data signal for each pixel of the specific field delayed by the branch that is the signal 113 and the image data signal for each pixel of the next applied field. The sub-pixels of the display unit 120 are output. As described above, the signal branching unit 113 and the signal calculating unit 114 may be implemented by software such as a program, but are preferably implemented by a microcomputer. In particular, the signal branch 113 may be implemented in a hardware configuration such as, for example, flip-flop.

Hereinafter, the operation of the controller 110, that is, the field generator 111 and the signal applying unit 112 shown in FIG. 2 will be described with reference to the drawings, and the overall color image display apparatus according to an embodiment of the present invention will be described. Describe the effect.

3 is a conceptual diagram illustrating field generation of a field generator of a color image display apparatus according to an exemplary embodiment of the present invention. 3 is a view for explaining the concept of the field generating unit 111 according to the present invention to divide the original high-resolution digital image data to be transmitted from the outside into four. Although FIG. 3 illustrates a concept of dividing into four fields according to a preferred embodiment of the present invention, those skilled in the art to which the present invention pertains have different numbers of fields within the scope without departing from the technical spirit of the present invention. It will be understood through the detailed description of the present invention that can be divided into. Another embodiment of the invention is described again below.

As shown in FIG. 3, the field generator 111 receives an original pixel-specific digital image data signal 300 to be displayed from the outside and divides the field into four fields 310, 320, 330, and 340. More specifically, in the present invention, an F11 field 310 is generated by sampling the pixels 10 positioned in odd-numbered positions in the horizontal and vertical directions of the original digital image data signal 300 to be displayed. In addition, the F10 field 320 is generated by sampling pixels 10 positioned in the even numbered horizontal direction and odd numbers in the vertical direction, and pixels 10 positioned in the odd numbered horizontal direction and positioned evenly in the vertical direction. Is generated to generate the F21 field 330, and finally, the F22 field 340 is generated by sampling the pixels 10 positioned at even-numbered pixels in the horizontal and vertical directions, respectively. Therefore, when the number of pixels for the original digital image data to be displayed is 2 m in the horizontal direction and 2 n in the vertical direction, the number of pixels for the digital image data of each field 310, 320, 330, 340 is m in the horizontal direction. In the vertical direction, the number is n and the total number of pixels is half.

4 is a schematic diagram of an image data signal application method for each pixel of each field according to an embodiment of the present invention. As shown in FIG. 4, FIGS. 4A through 4D show Nth and N + of F11 field 310, F21 field 330, F12 field 320 and F22 field 340, respectively. A method of applying the image data signal of the first horizontal line to the pixel 10 of the Nth N + 1th horizontal line of the display unit 120, and more specifically, to the R, G, and B subpixels. In the drawing, R (N, 1) of the Nth horizontal line applies the image data signal of the first subpixel of the Nth horizontal line of each field to the R subpixel of the Nth horizontal line of the display unit 120. Indicates. In addition, R (N, x) of the Nth horizontal line means skipping the signal without applying a signal to the R subpixel of the Nth horizontal line of the display unit 120. Where N is a natural number.

Hereinafter, a method of applying the signal of the image data of each field by the signal applying unit 112 to each of the R, G, and B subpixels of the display unit 120 will be described with reference to FIG. 4. Here, it should be noted that the image data signal on the horizontal line of the display unit 120 is applied according to the horizontal synchronization signal, and the image data signal for each subpixel of the display unit 120 is applied according to the clock signal. . First, application of the image data signal of the F11 field 310 will be described with reference to FIG. 4 (a). The pixel-specific image data signals of the Nth horizontal line of the F11 field 210 are sequentially applied to the subpixels of the Nth horizontal line of the display unit 120. More specifically, in the N-th horizontal line of the display unit 120, in the case of the F11 field 310, R (N, 1), G (N, 1), and B (N, 1) after the horizontal synchronization signal. The image data signal is applied in the order of At this time, as can be seen in Figure 3 (N, 1) is the first sub-pixel of the N-th horizontal line of the F11 field 310 is to be an image data signal of the R sub-pixel. Accordingly, the image data signal of the F11 field 310 is sequentially applied to the pixels of the display unit 120.

Next, application of the image data signal of the F12 field 320 will be described with reference to FIG. 4 (b). The pixel-specific image data signal of the Nth horizontal line of the F12 field 320 is applied after the first one or the first two subpixels of the Nth horizontal line of the display unit 120 are skipped. In more detail, the F22 field 240 crosses R (N, x), which is the first pixel of the display unit 120, after the horizontal synchronization signal is applied to the N-th horizontal line of the display unit 120. Jump from G subpixel to G (N, 1), B (N, 1), R (N, 1), or the first and second pixels R (N, x), G (N, x ) Is skipped and the signals are applied in the order of B (N, 1), R (N, 1), G (N, 1). 4B illustrates the latter case, in which the first two subpixels R (N, x) and G (N, x) of the Nth horizontal line of the display unit 120 are skipped and then The subpixels B (N, 1) to the pixel-specific image data of the F12 field 320 are applied.

Next, application of the image data signal of the F21 field 330 will be described with reference to FIG. 4C. The pixel-specific image data signals of the N-th horizontal line of the F21 field 330 are sequentially applied to the sub-pixels of the N-th horizontal line of the display unit 120, and three R, G, and B signals of the display unit 120 are applied. One or two subpixels of the subpixels apply an image data signal of a corresponding subpixel of a horizontal line adjacent to the display unit 120 in a vertical direction, that is, an N-1 th or N + 1 th horizontal line. In FIG. 4C, as an embodiment, the G subpixel of the R, G, and B subpixels of the Nth horizontal line of the display unit 120 applies an image data signal of the G subpixel of the N−1th horizontal line. It is showing. 4 (c), the horizontal synchronization signal is applied to the N-th horizontal line of the display unit 120 in the case of the F21 field 330, followed by R (N, 1) and G (N). The image data signal is applied in the order of -1,1) and B (N, 1). This applies a pixel-specific image data signal of the N-th horizontal line of the F21 field 330 sequentially to the N-th horizontal line of the display unit 120, in the case of the G sub-pixel of the pixel N-1 of the horizontal line This means that the video data signal of the G pixel is applied.

Next, application of the video data signal of the F22 field 340 will be described with reference to FIG. 4 (d). The pixel-specific image data signal of the N-th horizontal line of the F22 field 340 is applied from the next sub-pixel after skipping the first one or the first two sub-pixels of the N-th horizontal line of the display unit 120. One or two of the three subpixels R, G, and B of 120 may correspond to a horizontal line adjacent to the display unit 120 in the vertical direction, that is, the N-1 th or N + 1 th horizontal lines. The image data signal of the pixel is applied. 4 (d) shows, as an example, that the first two subpixels R (N, x), G (N, x) of the display unit 120 are skipped and the next subpixels B (N, 1) to F22 fields. In FIG. 340, image data for each pixel of the N-th horizontal line is applied, while G sub-pixels among the R, G, and B sub-pixels apply image data of the G sub-pixel of the N-th horizontal line. Referring to FIG. 4 (d), the N-th horizontal line of the display unit 120 is applied to the N-th horizontal line of the display unit 120 after the horizontal synchronous signal is applied to the N-th horizontal line of the display unit 120. Skip the first two subpixels R (N, x), G (N, x) and then apply pixel-specific image data of the F22 field 340 from the next subpixel B (N, 1) and G In the case of the subpixel, the video data signal of the G subpixel of the N-1th horizontal line is applied. Accordingly, each subpixel of the Nth horizontal line of the display unit 120 is R (N, x), G (N, x), B (N, 1), R (N, 1), G (N-1). The signal is applied as shown in (1).

As described above, the image data signals of the Nth horizontal line of the F11 field 310 and the F21 field 330 are sequentially arranged in the order of R, G, and B subpixels of the Nth horizontal line of the display unit 120. The image data signal of the Nth horizontal line of the F12 field 320 and the F22 field 340 is applied to the order of G, B, R or B, R, G of the Nth horizontal line of the display unit 120. Are sequentially applied. In addition, image data signals of the N-th horizontal line of the F11 field 310 and the F12 field 320 are respectively applied to R, G, and B subpixels of the N-th horizontal line of the display unit 120. In the case of the image data signal of the Nth horizontal line of the F21 field 330 and the F22 field 340, one or two subpixels of the R, G, and B subpixels of the Nth horizontal line of the display unit 120 are The video data signal of the corresponding subpixel of the N-1 th or N + 1 th horizontal lines is applied.

The application principle of the image data signal of the N-th horizontal line of the display unit 120 is equally applied to the N-1 th or N + 1 th. According to the exemplary embodiment of the present invention illustrated in FIG. 4, in the N + 1th horizontal line of the display unit 120, the image data signal of the N + 1th horizontal line of the F11 field 310 is R (N + 1). , (1), G (N + 1,1), B (N + 1,1), and R (N) which is the first and second subpixels of the N + 1th horizontal line of the F12 field 320. Skip + 1, x) and G (N + 1, x) and then B subpixels to B (N + 1,1), R (N + 1,1), G (N + 1,1) The video data signals of the N + 1th horizontal line of the F21 field 330 are sequentially applied in the order of R, G, and B. The G subpixels of the N + 1th horizontal line of the display unit 120 By applying the video data signals of the G subpixels of the neighboring Nth horizontal lines, they are sequentially applied in the order of R (N + 1,1), G (N, 1), and B (N + 1,1). The image data signal of the N + 1th horizontal line of the F22 field 340 is applied from the B pixel while skipping the first and second pixels R (N + 1, x) and G (N + 1, x). Where G subpixel is the Nth number G unit is by B (N + 1,1) the image signal data of the pixel of the line, R (N + 1,1), is applied in the order of G (N, 1).

Meanwhile, the color image display apparatus according to the embodiment of the present invention receives an image data signal from an external source or the like and preferably generates four fields in units of frames. That is, a plurality of pixel-specific image data signals constituting one frame, for example, are preferably generated in four fields. In this case, although the signal may be applied to the display unit 120 four times for the image data signals of the four fields one by one, in this case, the clock speed and the horizontal for applying the signal to each sub-pixel of the display unit 120, The vertical synchronization signal application processing speed is increased by four times. Thus, in the display device of the present invention, 'blinking phenomenon' (flickering) occurs, and power consumption increases with increasing processing speed. In addition, deterioration of the display unit 120 may occur due to an increase in the on / off frequency.

In order to overcome the disadvantages described above, in the present invention, the display unit 120 delays the application time of the image data signal of the F11 field 310 from the four field image data signals generated as described above for a predetermined time and then the F12 field. When the image data signal of 320 is applied, it is applied simultaneously. Likewise, the application time of the image data signal of the F21 field 330 is delayed for a predetermined time and is simultaneously applied when the image data signal of the F22 field 340 is applied. In this case, the image data signals of the fields 310, 320, 330, and 340 are applied to the corresponding subpixels of the display unit 120 as described above. Therefore, in one embodiment of the present invention, by applying the video data signals of two fields (fields F11 + F12 and fields F21 + F22) instead of four fields 310, 320, 330, 340, the display unit 120 is doubled. The clock speed and the synchronization signal speed alone can achieve four times the resolution.

2 to 4, the operation of the color image display apparatus according to an embodiment of the present invention will be described. As described above, the signal applying unit 112 sequentially processes the image data signals of the four fields F11, F12, F21, and F22 generated by the field generator 111 from the F11 field to the F22 field. The display unit 120 is applied to. In this case, the signal branch delay unit 113 delays the application time of the image data signal of the N-th horizontal line of the F11 field for a specific time, and the signal calculator 114 N-th horizontal of the F11 field of which the application point is delayed. The N-th value of the display unit 120 is calculated by calculating an average value of the sub-pixel image data signal of the line and the sub-pixel image data signal of the N-th horizontal line of the F22 field which is next applied by the signal applying unit 112. Apply to R, G, B sub-pixels of horizontal line respectively. For example, in the case of FIGS. 4A and 4B, the signal applying unit 112 displays an F11 field in the R subpixel of the second pixel of the Nth horizontal line of the display unit 120. An image data signal of an R subpixel and an R (N, 2) signal of F11 are applied among the second pixels of the Nth horizontal line of 310, wherein the R (N, 2) signal of F11 is applied for a specific time. Delay. Subsequently, when the image applying signal of the R subpixel and the R (N, 1) signal of F12 are applied by the signal applying unit 112 of the first pixel of the Nth horizontal line of the F12 field, An average value with the R (N, 2) signal, that is, an average {R (N, 2) of F11 + R (N, 1) of F12} signal is applied. In addition, in the case of FIGS. 4A and 4B, the second G subpixel of the Nth horizontal line of the display unit 120 also receives a signal in the same manner as the R subpixel, and the second In the case of the B subpixel, an average value of B (N, 2) of F11 and B (N, 2) of F12, that is, an average {B (N, 2) of F11 + B (N, 2) of F12} signal is applied. do.

The signal branch delay unit 113 delays the application time of the subpixel image data signal of the N-th horizontal line of the F21 field for a specific time, and the signal calculation unit 114 delays the application time of the F21 field. The display unit 120 calculates an average value of the sub-pixel image data signal of the N-th horizontal line and the sub-pixel image data signal of the N-th horizontal line of the F22 field, which is next applied by the signal applying unit 112. Are applied to the corresponding R, G, and B subpixels of the Nth horizontal line. For example, in the case of FIGS. 4 (c) and 4 (d), the R sub-pixel of the second pixel of the N-th horizontal line of the display unit 120 by the signal applying unit 112 has an F21 field. Among the second pixels of the N-th horizontal line, the image data signal of the R subpixel and the R (N, 2) signal of F21 are applied. At this time, the R (N, 2) signal of F21 is delayed for a specific time. Subsequently, when the image applying signal of the R subpixel and the R (N, 1) signal of F22 of the first pixel of the N-th horizontal line of the F22 field are applied by the signal applying unit 112, An average value with the R (N, 2) signal, that is, an average {R (N, 2) of F21 + R (N, 1) of F22} signal is applied. 4 (c) and 4 (d), in the case of the second B subpixel of the N-th horizontal line of the display unit 120, B (N, 2) of Average {F21 + B (of F22). N, 2)} signal is applied, and in the case of the second G subpixel of the Nth horizontal line of the display unit 120, the image data of the second G subpixel of the N-1th horizontal line of the display unit 120. Signal, average value of G (N-1,2) of F21 and G (N-1,1) of F22, that is, Average {G (N-1,2) of F21 + G (N-1,1) of F22 } The signal is applied.

This is expressed as a general formula below.

[Equation 1]

When the video data signal of the F11 field is delayed and applied simultaneously with the video data signal of the F12 field (F11 + F12),

R (N, K) = Average {R (N, K) of F11 + R (N, K-1) of F12}

G (N, K) = Average {G (N, K) in F11 + G (N, K-1) in F12}

B (N, K) = Average {B (N, K) at F11 + B (N, K) at F12}

That is, the video data signal of the applied F11 field is delayed by one bit so as to be combined with the video data signal of the currently applied F12 field to output an image data signal corresponding to an average value.

[Equation 2]

When the video data signal of the F21 field is delayed and simultaneously applied to the video data signal of the F22 field (F21 + F22),

R (N, K) = Average {R (N, K) at F21 + R (N, K-1) at F22}

G (N, K) = Average {G (N-1, K) of F21 + G (N-1, K-1) of F22}

B (N, K) = Average {B (N, K) at F21 + B (N, K) at F22}

That is, the video data signal of the applied F21 field is delayed by one bit and summed with the video data signal of the currently applied F22 field to output an image data signal corresponding to an average value. The average value is output, but the G subpixel is delayed for one horizontal line to apply the image data signal of the G subpixel of the next horizontal line.

By applying the signal in this way, the image data signal of the F11, F12, F21, and F22 fields is applied to the display unit 120 for each field, respectively, and the image data signal of the F11 + F12 field and the image data signal of the F21 + F22 field are applied. By applying the data at four times, instead of applying data at four times, it is possible to realize four times the resolution.

On the other hand, the color image display apparatus according to another embodiment of the present invention may apply the image data signal of the four fields to the display unit 120 at one time. In other words, the branch delay unit 113 is a first specific time when the image data signal of the F11 field 310 applied by the signal applying unit 112 is applied from among the four field image data signals generated as described above. Delay the video data signal application time of the F12 field 320 for a second specific time, and delay the video data signal application time of the F21 field 330 for a third specific time. 114 calculates an average value of the image data signals of the F11, F12 and F21 fields which are delayed in the signal application time point, and then the image data signal of the F22 field 340 applied by the signal applying unit 112. The display unit 120 outputs the corresponding subpixels of the display unit 120. Therefore, in another embodiment of the present invention, by applying the video data signals of the four fields to the corresponding sub-pixels of the display unit 120 at once, four times the resolution can be achieved with only the original clock speed and the synchronization signal speed. For example, in FIGS. 4A to 4D, when the image data signal applied to the second R subpixel of the N-th horizontal line of the display unit 120 is described, the N-th of the display unit 120 is described. First, the signal applying unit 112 applies the image data signal of the second R subpixel of the Nth horizontal line of the F11 field and the R (N, 2) signal of F11 to the second R subpixel of the horizontal line. At this time, the R (N, 2) signal of F11 is delayed by the branch delay unit 113 which is a signal for a first specific time. Subsequently, the signal applying unit 112 receives the image data signal of the first R subpixel of the N-th horizontal line of the F12 field and the R (N, 1) signal of F12, wherein the branch delay unit 113 is the signal. As a result, the R (N, 1) signal of F12 is delayed for a second specific time. Subsequently, the signal applying unit 112 receives the image data signal of the second R subpixel of the Nth horizontal line of the F21 field and the R (N, 2) signal of F21, wherein the branch delay unit 113 is the signal. As a result, the R (N, 2) signal of F21 is delayed for the third specific time. Subsequently, when the image data signal of the first R subpixel of the Nth horizontal line of the F22 field, R (N, 1) of F22 is applied, the delayed R (N, 2) signal of F11 and R (N of F12). , 1), the average value of the R (N, 2) signal of F21 and the R (N, 1) signal of F22, that is, average {R (N, 2) of F11 + R (N, 1) of F12 + F21 R (N, 2) + R (N, 1)} of F22 is applied.

By applying the same method as above, the signal applied to the R, G, and B subpixels of the display unit 120 is expressed as follows.

[Equation 3]

R (N, K) = Average {R (N, K) of F11 + R (N, K-1) of F12 + R (N, K) of F21 + R (N, K-1) of F22}

G (N, K) = Average {G (N, K) of F11 + G (N, K-1) of F12 + G (N-1, K) of F21 + G (N-1, K- of F22 One)}

B (N, K) = Average {B (N, K) of F11 + B (N, K) of F12 + B (N, K) of F21 + B (N, K) of F22}

As such, when the image data signal of each field applied to the R, G, and B subpixels of the display unit 120 is made into a single value and applied, the quadratic resolution can be realized without increasing the clock speed and the synchronization signal speed. It becomes possible.

Here, it should be noted that the above example is that the signal is applied in the case of Figs. 4 (a) to 4 (d). Accordingly, in the color image display device provided by the present invention, it is possible to apply an image data signal of each field to each sub-pixel of the display unit within the scope of the technical concept of the present invention. Those skilled in the art will appreciate.

FIG. 5 is a schematic diagram illustrating a display phenomenon of horizontal and vertical lines for signal application of each field of FIG. 4 according to an exemplary embodiment of the present invention. FIG. As described above, the F11 field 310 and the F12 field 320 simultaneously apply the image data signal of the Nth horizontal line to the Nth horizontal line of the display unit 120, but the F21 field 330 And in the case of the F22 field 340, the G subpixel simultaneously applies an image data signal corresponding to the G subpixel of the N−1th horizontal line of the display unit 120. The same applies to the N + 1th horizontal line. As described above, by simultaneously applying the video data signals of the F11 field and the F12 field and simultaneously applying the video data signals of the F21 field and the F22 field, as illustrated in FIG. In the line and the N + 1th horizontal line, the image data of the Nth horizontal line of the F11 field 310 and the F12 field 320 is obtained from the R, G, B subpixels of the Nth horizontal line of the display unit 120. The image data of the N-th horizontal line of the F21 field 230 and the F22 field 240 is displayed in the center, while the image data signal of the G sub-pixel of the N-th horizontal line of the display unit 120 is one horizontal line. Since it is applied with a delay, it is displayed at the lower end by a predetermined interval from the center of the R, G, and B subpixels of the Nth horizontal line of the display unit 120. Therefore, as a result, since two field lines are displayed on one horizontal line of the display unit 120 at a short time interval, the human eye can see both lines of the field so that the vertical resolution is doubled. do. This has the same effect in the case of N + 1.

In addition, as described above, in the case of the F11 field 310 and the F21 field 330 in the N-th horizontal line of the display unit 120, the first and second sub-pixels of the corresponding horizontal line are included in R, G. B subpixel (i.e., R (N, 1), G (N, 1), B (N, 1) for the F11 field 310, R (N, 1) for the F21 field 330) The video data signals are applied in the order of G (N-1,1) and B (N, 1), but in the case of the F12 field 320 and the F22 field 340, the first and second of the corresponding horizontal line are applied. B subpixels (i.e., B (N, 1), R (for the F12 field 320) are skipped without applying a data signal to each of R (N, x) and G (N, x). N, 1), G (N, 1), and in the case of the F22 field 340, data signals are applied from B (N, 1), R (N, 1), and G (N-1,1). The same applies to the N + 1th horizontal line. Therefore, as shown in FIG. 5B, the Nth horizontal line of the F11 field 310 and the F21 field 320 of the Nth horizontal line and the N + 1th horizontal line of the display unit 120 are separated. The image data signal is displayed at the center of the R, G, and B subpixels of the Nth horizontal line of the display unit 120. The image data signal of the Nth horizontal line of the F12 field 310 and the F22 field 340 The display unit 120 is displayed at the center of the B, R, and G subpixels of the N-th horizontal line. Therefore, the image data signal of the N-th horizontal line of the F12 field 320 and the F22 field 340 is displayed on the display unit 120 of the N-th horizontal line of the F11 field 310 and the F21 field 330. It is displayed at intervals of two subpixels to the right in the horizontal direction than the image data signal. This has the same effect in the N + 1 th horizontal line of the display unit 120. Therefore, since two vertical lines are displayed at a short time interval in one pixel of the Nth horizontal line and the N + 1 horizontal line of the display unit 120, the eye can see the vertical lines of both fields. As a result, twice the horizontal resolution can be achieved.

Accordingly, as shown in FIG. 5 (a), each horizontal line of the display unit 120 of the color image display apparatus according to the present invention includes an image obtained by applying an image data signal of the F11 field 310 and the F12 field 320. Images by application of the image data signals of the F21 field 330 and the F22 field 340 are displayed at predetermined intervals. In addition, as shown in FIG. 5B, each horizontal line of the display unit 120 includes an image by applying an image data signal of the F11 field 310 and the F21 field 330, and the F12 field 320 and the F22 field. Images by the application of the image data signal of 340 are displayed at intervals of one or two subpixels. This results in the effect of displaying all the original image data signal to be displayed on the display unit 120 having a relatively small number of pixels, resulting in a resolution improvement in a display apparatus having a small number of pixels.

Note that the video data signal application order, application method, arrangement order of the R, G, and B subpixels, and the signal application order of the R, G, and B subpixels in each field may be different. In other words, in the case of the F11 field 310, R (N, x), which is the first subpixel of the display unit 120, is skipped and G (N, 1), B (N, 1), R (N, The signal can be applied in the order of 1), skipping the first subpixel and the second subpixel R (N, x), G (N, x) and B (N, 1), R (N, 1) The signal may be applied in the order of G (N, 1). The same applies to the N + 1th horizontal line.

In addition, in the case of the F21 field 230 and the F22 field 240 in the Nth horizontal line, the G subpixel may be applied with an image data signal corresponding to the G subpixel of the N + 1th horizontal line. Accordingly, the G subpixel of the R, G, and B subpixels in one horizontal line applies a signal corresponding to the G subpixel of the neighboring horizontal line of the horizontal line. Furthermore, not only the G subpixel of the R, G, and B subpixels, but also the R subpixel or the B subpixel may apply an image data signal corresponding to the R subpixel or the B subpixel of the adjacent horizontal line of the horizontal line.

6 is a flowchart illustrating a color image display method according to an embodiment of the present invention. 6 illustrates a method of displaying a color image on a color display device in which pixels consisting of R, G, and B subpixels are repeatedly arranged in a horizontal direction to form horizontal lines, and a plurality of horizontal lines are repeatedly arranged in a vertical direction. Explain. The color display device is preferably a liquid crystal display (LCD). In the following description, the horizontal synchronizing signal, the vertical synchronizing signal, and the clock signal application time are the same as those of the color image display apparatus described above. First, a plurality of pixel-specific digital image data signals constituting one frame to be displayed are preferably divided into four fields in units of frames (601). Preferably, the image data signal of the pixel located in the odd number in the horizontal direction and the vertical direction is represented by the first field F11, and the image data signal of the pixel located in the even number in the horizontal direction and positioned in the odd number in the vertical direction is second. An image data signal of a pixel located in an odd number in the horizontal direction and an even number in the vertical direction in a field F12, and an image data signal of a pixel located in an even number in the horizontal and vertical directions in a third field F21. Is divided into a fourth field F22.

The application time of the pixel-specific image data signal of the N-th horizontal line of the first field F11 applied to the corresponding pixel from the first pixel of the N-th horizontal line of the color display device is delayed for a specific time that can be adjusted ( 602). Subsequently, the pixel-specific image data signal of the N-th horizontal line of the first field F11 and the specific sub-pixel of the N-th horizontal line of the color display device are delayed in step 602. An average value of the digital image data signal for each pixel of the N-th horizontal line of the second field F12 is calculated (603), and the calculated average value is applied for each corresponding R, G, and B subpixels of the color display device ( 604).

Subsequently, the first pixel of the color display device is applied to the corresponding pixel from the first pixel of the N-th horizontal line, and the image data signal of the first or second sub-pixel of the pixel-specific image data signals is adjacent to the sub-pixel in the vertical direction. The application time of the digital image data signal for each pixel of the N-th horizontal line of the third field F21 to which the image data signal is applied is delayed for a specific time that can be adjusted (605). Subsequently, the pixel-specific image data signal of the N-th horizontal line of the third field F21 and the specific sub-pixel of the N-th horizontal line of the color display device are delayed in step 605. The image data signal of the first or second subpixel among the image data signals of each pixel is the pixel-specific digital image of the Nth horizontal line of the fourth field F22 that applies the image data signal of the neighboring subpixel in the vertical direction. The average value of the data signal is calculated (606). The calculated average value is applied to each R, G, and B subpixels of the color display device (607). The first pixel is preferably the first pixel of the Nth horizontal line, and the specific subpixel is the second or third subpixel of the first pixel of the Nth horizontal line.

Preferably, the pixel-specific image data signal of the N-th horizontal line of the first and third fields F11 and F21 is applied from the R, G, and B sub-pixels of the N-th horizontal line of the color display device. The pixel-specific image data signals of the N-th horizontal line of the second and fourth fields F12 and F22 are applied from B, R, G or G, B, R sub-pixels of the color display device. In addition, when the pixel-specific image data signals of the N-th horizontal line of the third and fourth fields F21 and F22 are applied to the corresponding pixels of the color display device, the image data signals of R, G, and B subpixels are applied. One selected from among applies a video data signal of a corresponding subpixel of an N + 1th or N-1th horizontal line. Preferably, the video data signal of the G subpixel of the Nth horizontal line is applied to the video data signal of the G subpixel of the N + 1th or N-1th horizontal line.

Here, after the average value of the image data signal for each field calculated in step 603 is applied to each corresponding sub-pixel of the color display device (604), step 605 is performed. That is, the average value of the image data signal for each subpixel from the first horizontal line to the last horizontal line of the first and second fields F11 and F12 corresponds to the first horizontal line and the last horizontal line of the color display device, respectively. It is to be applied per subpixel. In this case, the order of applying the image data signal of each field may be arbitrarily changed.

Subsequently, it is determined whether the video data signals of all the frames have been applied (608). If the video data signals of all the frames have been applied, the process is terminated. Otherwise, the process proceeds to step 601 to further divide the video data of the next frame into four fields. do.

7 is a flowchart illustrating a color image display method according to another embodiment of the present invention. A plurality of pixel-specific digital image data signals constituting one frame to be displayed are preferably divided into four fields in units of frames (701). Preferably, the image data signal of the pixel in the odd-numbered position in the horizontal and vertical directions is the first field F11, and the image data signal of the pixel in the odd-numbered position and in the vertical direction is placed in the first field F11. An image data signal of a pixel located in an odd number in the horizontal direction and an even number in the vertical direction in a field F12, and an image data signal of a pixel located in an even number in the horizontal and vertical directions in a third field F21. Is divided into a fourth field F22.

The application time of the pixel-specific digital image data signal of the N-th horizontal line of the first field F11 to be applied to the corresponding pixel from the first pixel of the N-th (N is a natural number) horizontal line of the color display device. Delay 702 for a specific time and apply the pixel-specific digital image data signal of the Nth horizontal line of the second field F12 to the corresponding pixel from the specific subpixel of the Nth horizontal line of the color display device. The application time is delayed for a second specific time (703), and is applied to the corresponding pixel from the first pixel of the Nth horizontal line of the color display device, and the first or second subpixel of the pixel-specific image data signal is applied. The image data signal delays the application time of the pixel-specific digital image data signal of the N-th horizontal line of the third field F21 for applying the image data signal of the neighboring subpixel in the vertical direction for a third specific time ( 704).

Subsequently, the digital image data signal for each pixel of the N-th horizontal line of the first to third fields delayed in the steps 702 to 704, respectively, and the specific sub-pixel of the N-th horizontal line of the color display device. N-th image of the fourth field F22, which is applied to a corresponding pixel, wherein the image data signal of the first or second subpixel of the pixel-specific image data signal is applied with the image data signal of the neighboring subpixel in the vertical direction. An average value of the digital image data signal for each pixel of the horizontal line is calculated (705) and applied to each subpixel of the color display device (706). The first pixel is preferably the first pixel of the Nth horizontal line, and the specific subpixel is the second or third subpixel of the first pixel of the Nth horizontal line.

Here, the pixel-specific image data signals of the N-th horizontal line of the first and third fields F11 and F21 are applied from the R, G, and B sub-pixels of the N-th horizontal line of the color display device. And the pixel-specific image data signal of the N-th horizontal line of the fourth fields F12 and F22 from the B, R, G, or G, B, R sub-pixels of the color display device. In addition, when the pixel-specific image data signals of the N-th horizontal line of the third and fourth fields F21 and F22 are applied to the corresponding pixels of the color display device, the image data signals of R, G, and B subpixels are applied. One selected from among applies a video data signal of a corresponding subpixel of an N + 1th or N-1th horizontal line. Preferably, the video data signal of the G subpixel of the Nth horizontal line is applied to the video data signal of the G subpixel of the N + 1th or N-1th horizontal line.

As can be seen from the above, the application point of the image data signal of the N-th horizontal line of the first field, the second field and the third field is delayed until the image data signal of the N-th horizontal line of the fourth field is applied. When the image data signal of the N-th horizontal line of the fourth field is applied, the average value of the image data signal of the N-th horizontal line of all the fields is calculated and output to the color display device.

Subsequently, it is determined whether the image data signals of all the frames have been applied (707). If the image data signals of all the frames have been applied, the process is terminated. Otherwise, the process proceeds to step 701 to divide the image data of the next frame into four fields again. do.

As described above, in the color image display method according to the present invention, the image data for each pixel to be displayed is preferably divided into four fields, and the image data signal for each field is R, G, B of the color display device. By alternately applying the order for each codeword, as shown in FIG. 5, the lines by two fields in the horizontal direction and the lines by the two fields in the vertical direction can be seen by the eyes. Each can be doubled.

Details of the detailed description and drawings described above are related to one embodiment of the present invention, and thus the present invention is not limited thereto. It will be understood by those skilled in the art that substitutions, modifications, or changes can be made without departing from the technical spirit of the present invention. Accordingly, the scope of the present invention should be determined by the appended claims.

According to the present invention, the display can be displayed at a high resolution by doubling the resolution in the horizontal and vertical directions, respectively, than the physical limitations of a mobile terminal, a mobile phone or a PDA using a color liquid crystal display (LCD).

In addition, it is possible to use low-cost LCD as it is, without developing and using a separate high-definition dedicated LCD, enabling low cost, low power consumption, and small size.

Claims (28)

A color image display device including a display unit in which pixels consisting of R, G, and B subpixels are repeatedly arranged in a horizontal direction to form horizontal lines, and a plurality of horizontal lines are repeatedly arranged in a vertical direction. To A first field F11 is generated by sampling an image data signal of a pixel located in an odd number in the horizontal and vertical directions among a plurality of pixel image data signals constituting one frame to be displayed, and generating an even number in the horizontal direction. To generate a second field F12 by sampling an image data signal of a pixel located at an odd number in the vertical direction, and to sample an image data signal of a pixel located at an odd number in the horizontal direction and an even number in the vertical direction. A field generator which generates a third field F21 and generates a fourth field F22 by sampling an image data signal of an even numbered pixel in the horizontal and vertical directions; The pixel-specific image data signal of the N-th horizontal line of the first field F11 (where N is a natural number) is applied to the corresponding pixel from the first pixel of the N-th horizontal line of the display unit, and the second field ( The pixel-specific image data signal of the N-th horizontal line of F12 is applied to the corresponding pixel from the specific sub-pixel of the N-th horizontal line of the display unit, and the pixel-specific image of the N-th horizontal line of the third field F21 is applied. The data signal is applied to the corresponding pixel from the first pixel of the display unit, and the image data signal of one or two subpixels of the pixel-specific image data signals applies the signal of the image data of neighboring subpixels in the vertical direction. And applying the pixel-specific image data signal of the N-th horizontal line of the fourth field F22 to the corresponding pixel from the specific sub-pixel of the N-th horizontal line of the display unit. One or a video data signal of two sub-pixels is part signal for applying a signal of the image data of adjacent sub-pixels in the vertical direction of the; A branch delay unit for delaying the application time of the image data signal of each horizontal line of the at least one specific field applied to the sub-pixels of the display unit by the signal applying unit for an adjustable time period; And The average value of the pixel-specific image data signal of the N-th horizontal line of the specific field delayed by the signal-in branch delay unit and the pixel-specific image data signal of the N-th horizontal line of the field applied next by the signal applying unit is calculated. And a signal calculator which calculates and outputs each subpixel of the display unit. The method of claim 1, And the display unit is a color liquid crystal display (LCD). The method of claim 1, And the first pixel is the first pixel of the Nth horizontal line. The method of claim 1, And the specific sub-pixel is a second sub-pixel of the first pixel of the N-th horizontal line. The method of claim 1, And the specific subpixel is a third subpixel of the first pixel of the Nth horizontal line. The method of claim 1, wherein the field generating unit, And generating a field in a frame unit of a signal of digital image data for each pixel to be displayed. The method of claim 1, wherein the signal applying unit, The pixel-specific image data signals of the N-th horizontal line of the first and third fields F11 and F21 are applied from the R, G, and B sub-pixels of the N-th horizontal line of the display unit. And (b) R, G, B, and R subpixels of the pixel of the display unit from the Nth horizontal line (F12, F22). The method of claim 1, wherein the signal applying unit, One of the image data signals of the R, G, and B subpixels is applied when the image data signal of each pixel of the N-th horizontal line of the third and fourth fields F21 and F22 is applied to the corresponding pixel of the display unit. Is a color image display device displaying image data signals of a corresponding subpixel of an N + 1th or N-1th horizontal line. The method of claim 8, wherein the signal applying unit, The image data signal of the G subpixel among the image data signals of the R, G, and B subpixels applies the image data signal of the G subpixel of the N + 1th or N-1th horizontal line. Device. The method of claim 1, And a synchronizing signal and a clock generator for generating and outputting a horizontal synchronizing signal, a vertical synchronizing signal, and a clock for displaying the image data signal for each pixel to be displayed on the pixel of the display unit. The method of claim 1, wherein the signal delay branch and the signal calculation unit, Each of the subpixel images of the Nth horizontal line of the first field F11 is delayed for a specific time by delaying the application time of the image data signal of the Nth horizontal line of the first field F11. The average value of the data signal and the image data signal of each subpixel of the Nth horizontal line of the second field F22 is calculated and output to the corresponding R, G, B subpixels of the Nth horizontal line of the display unit. Each of the sub-pixel image data signal application time of the N-th horizontal line of the third field F21 is delayed for a specific time, and the sub-pixel image data signal of the N-th horizontal line of the third field F21 The color image display, characterized in that the average value of the sub-pixel image data signal of the N-th horizontal line of the fourth field (F22) is calculated and output to the corresponding R, G, B sub-pixel of the N-th horizontal line of the display unit. Device. The method of claim 1, wherein the signal delay branch and the signal calculation unit, When the image data signal of each pixel of the N-th horizontal line of the first field is applied, When the image data signal of the pixel of the N-th horizontal line of the second field is applied and the pixel of the N-th horizontal line of the third field, respectively Delaying the application time of the image data signal until the application time of the image data signal for each pixel of the N-th horizontal line of the fourth field; The pixel-specific image data of the N-th horizontal line of the first field, the pixel-specific image data of the N-th horizontal line of the second field, the pixel-specific image data of the N-th horizontal line of the third field, and the fourth field. And outputting a signal of image data for each pixel corresponding to an average value of image data for each pixel of the Nth horizontal line to a corresponding R, G, and B subpixel of the Nth horizontal line of the display unit. The method of claim 1, And the branch which is the signal comprises a flip-flop. Color image display in a color display device in which pixels consisting of R, G, and B subpixels are repeatedly arranged in a horizontal direction to form horizontal lines, and a plurality of horizontal lines are repeatedly arranged in a vertical direction. In the method, Video data signals of pixels positioned in an odd number in the horizontal and vertical directions among a plurality of digital image data signals for each pixel constituting one frame to be displayed are positioned in the even field in the horizontal direction and in the even number in the vertical direction. Image data signals of pixels located in odd-numbered pixels to the second field F12, and image data signals of pixels positioned odd-numbered in the horizontal direction and even-numbered in the vertical direction to the third field F21, and A field dividing step of dividing the video data signals of pixels positioned even in the vertical direction into fourth fields F22; A delay time of an application time of the image data signal for each pixel of the N-th horizontal line of the first field F11 applied to the corresponding pixel from the first pixel of the N-th horizontal line of the color display device for an adjustable time period; A delay phase being one signal; The image data signal for each pixel of the N-th horizontal line of the first field F11 delayed in the first signal delay step and the first pixel to be applied to a corresponding pixel from a specific sub-pixel of the N-th horizontal line of the color display device. A first signal applying step of calculating an average value of the digital image data signal for each pixel of the N-th horizontal line of the second field F12 and applying it to each of the R, G, and B subpixels of the color display device; The image data signals of the first or second sub-pixels among the image data signals of each pixel are applied to the corresponding pixels from the first pixel of the N-th horizontal line of the color display device. A delay step of delaying the application time of the digital image data signal for each pixel of the N-th horizontal line of the third field F21 to which the signal is applied during the specific time; And The image data signal of each pixel of the N-th horizontal line of the third field F21 delayed in the second signal delay step is applied to a corresponding pixel from a specific sub-pixel of the N-th horizontal line of the color display device. The image data signal of the first or second subpixel among the image data signals of each pixel is the pixel-specific digital image data of the Nth horizontal line of the fourth field F22 that applies the image data signal of neighboring subpixels in the vertical direction. And a second signal applying step of calculating an average value of the signals and applying the R, G, and B subpixels of the color display device. The method of claim 14, And the first pixel is the first pixel of the Nth horizontal line. The method of claim 14, And the specific subpixel is a second subpixel of the first pixel of the Nth horizontal line. The method of claim 14, And the specific subpixel is a third subpixel of the first pixel of the Nth horizontal line. The method of claim 14, The pixel-specific image data signals of the N-th horizontal line of the first and third fields F11 and F21 are applied from the R, G, and B sub-pixels of the N-th horizontal line of the color display device. And a B, R, G or G, B, R sub-pixel of the color display device is applied to the pixel-specific image data signal of the N-th horizontal line of four fields (F12, F22). The method of claim 14, When the pixel-specific image data corresponding to the average value of the pixel-specific image data signal of the N-th horizontal line of the third and fourth fields F21 and F22 is applied to the corresponding pixel of the color display device, R, G, The selected one of the image data signal of the B sub-pixel is a color image display method for applying the image data signal of the corresponding sub-pixel of the N + 1-th or N-1-th horizontal line. The method of claim 19, The image data signal of the G subpixel among the image data signals of the R, G, and B subpixels applies the image data signal of the G subpixel of the N + 1th or N-1th horizontal line. Way. Color image display in a color display device in which pixels consisting of R, G, and B subpixels are repeatedly arranged in a horizontal direction to form horizontal lines, and a plurality of horizontal lines are repeatedly arranged in a vertical direction. In the method, Video data signals of pixels positioned in an odd number in the horizontal and vertical directions among a plurality of digital image data signals for each pixel constituting one frame to be displayed are positioned in the even field in the horizontal direction and in the even number in the vertical direction. Image data signals of pixels located in odd-numbered pixels to the second field F12, and image data signals of pixels positioned odd-numbered in the horizontal direction and even-numbered in the vertical direction to the third field F21, and A field dividing step of dividing the video data signals of pixels positioned even in the vertical direction into fourth fields F22; And The application time of the pixel-specific digital image data signal of the N-th horizontal line of the first field F11 to be applied to the corresponding pixel from the first pixel of the N-th (N is a natural number) horizontal line of the color display device. A first signal delay step of delaying for a specific time; Delaying the application time of the digital image data signal for each pixel of the Nth horizontal line of the second field F12 applied to the corresponding pixel from the specific subpixel of the Nth horizontal line of the color display device for a second specific time period. A second signal delay step of causing; The image data signals of the first or second sub-pixels among the image data signals of each pixel are applied to the corresponding pixels from the first pixel of the N-th horizontal line of the color display device. A third signal delay step of delaying the application time of the digital image data signal for each pixel of the N-th horizontal line of the third field F21 to which the signal is applied for a third specific time; Applied to the pixel-specific digital image data signal of the N-th horizontal line of the first to third fields delayed in the first to third signal delay stages and to the corresponding pixel from the specific sub-pixel of the N-th horizontal line of the color display device. The image data signals of the first or second subpixels among the image data signals of each pixel are pixel-by-pixel of the N-th horizontal line of the fourth field F22 that applies the image data signals of neighboring subpixels in the vertical direction. And applying a signal to each subpixel of the color display device by calculating an average value of the digital image data signal. The method of claim 21, And the first pixel is the first pixel of the Nth horizontal line. The method of claim 21, And the specific subpixel is a second subpixel of the first pixel of the Nth horizontal line. The method of claim 21, And the specific subpixel is a third subpixel of the first pixel of the Nth horizontal line. The method of claim 21, The pixel-specific image data signals of the N-th horizontal line of the first and third fields F11 and F21 are applied from the R, G, and B sub-pixels of the N-th horizontal line of the color display device. And a B, R, G or G, B, R sub-pixel of the color display device is applied to the pixel-specific image data signal of the N-th horizontal line of four fields (F12, F22). The method of claim 21, When the image data signal of each pixel of the N-th horizontal line of the third and fourth fields F21 and F22 is applied to the corresponding pixel of the color display device, selection among image data signals of R, G, and B subpixels is performed. And one of them is a color image display method for applying the image data signal of the corresponding subpixel of the N + 1th or N-1th horizontal line. The method of claim 26, The image data signal of the G subpixel among the image data signals of the R, G, and B subpixels applies the image data signal of the G subpixel of the N + 1th or N-1th horizontal line. Way. The method of claim 21, Color delaying the application point of the image data signal of the N-th horizontal line of the first field, the second field and the third field to the application point of the image data signal of the N-th horizontal line of the fourth field, respectively Video display method.