KR20000023618A - Display device - Google Patents

Abstract

PURPOSE: A display apparatus is provided to display a moving picture largely. CONSTITUTION: A display apparatus comprises a picture display part which is composed of a plurality of unit pixels arranged in a horizontal direction and a vertical direction, and a signal switch part(12) which drives a new pixel composed of the unit pixels of the plurality. A region except for a region displayed by the new pixel is displayed by the unit pixels, and a switch of the display of the regions is performed by the signal switch part. A polarity of a voltage applied to a liquid crystal consisting of the new pixel is inverted between new pixels adjacent in the horizontal direction, and the inversion is conducted by the signal switch part.

Description

Display {DISPLAY DEVICE}

In the conventional image display apparatus, the function which simply displays the input signal was provided. It demonstrates in more detail using FIG.

2 is an example of an image display apparatus using a liquid crystal according to the prior art. In the image data generating device 21, an image interface signal including at least image data and a timing signal is generated. The image data generating apparatus 21 is supplied with image data compressed from the data storage device 25 or the communication line. The image interface signals are sequentially input to the horizontal liquid crystal driver 22 and the vertical liquid crystal driver 23 which are recording means. The horizontal liquid crystal driver 22 transmits image data to the liquid crystal panel 24 composed of an array of pixels. In addition, a vertical liquid crystal driver 23 is provided at an end portion of the liquid crystal panel 24.

These operations are as follows. In response to a request of the image data generating device 21, in the communication line or the data storage device 25, image information compressed according to the MPEG standard is supplied to the image data generating device 21, for example. The image data generating device 21 sequentially inputs image data for each frame to the horizontal liquid crystal driver 22. Each time the horizontal liquid crystal driver 22 accumulates pixel data for one horizontal pixel, the horizontal liquid crystal driver 22 collectively inputs image data for one horizontal pixel to the liquid crystal panel 24. At this time, the vertical liquid crystal driver 23 sequentially specifies the rows on the pixel array into which the image data is input. That is, the horizontal liquid crystal driver 22 and the vertical liquid crystal driver 23 receive an image interface signal, convert it into a drive signal for liquid crystal display, and output it to the liquid crystal panel 24. The liquid crystal panel 24 receives this drive signal and performs display.

In the conventional method of driving a dot matrix liquid crystal panel, a so-called active matrix is representative and is described in detail in Kobayashi Soichi, for example, in a color-liquid crystal display (industrial book). . As the active element, a thin film transistor (TFT) is usually used. In recent years, the resolution of an active matrix liquid crystal display device has been advanced, and display of, for example, about 400 dots / inch has been possible. This makes it possible to display print quality on the display device and to distinguish small fonts that have been difficult to realize in the past.

Disclosure of the Invention

For example, if you want to display a moving image of NTSC (non-interlaced, 575 × 483 pixels) on a high resolution display of about 400 dots / inch, the screen size is about 2 inches short of diagonal dimension. Only an extremely small image can be obtained.

An object of the present invention is to display a moving image largely.

The above object can be achieved by providing signal switching means for driving a new pixel composed of a plurality of consecutive unit pixels. Here, the "unit pixel" is the pixel seen from the structure, and the "new pixel" is the pixel seen from the driving.

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a display device, and more particularly, to a display device used as a display output of an OA device such as a television image display or a personal computer.

1 is a configuration diagram of a liquid crystal display of Example 1. FIG.

2 is a conventional liquid crystal display device.

FIG. 3 is a display pixel array diagram of 20 rows and 20 columns in Example 1. FIG.

4 is a configuration diagram of a liquid crystal display of Example 2. FIG.

5 is an explanatory diagram of a still picture area and a moving picture area in Example 2. FIG.

6A and 6B are explanatory diagrams of the configuration of polarities of display image signals in the liquid crystal display device of the third embodiment.

7 is a configuration diagram of a liquid crystal display of Example 4;

(A), (b), (c) and (d) of FIG. 8 are explanatory drawing of gradation display in Example 5. FIG.

9 is a configuration diagram when the display pixel array of the liquid crystal display of Example 1 is set to 20 rows and 20 columns.

10 is a drive timing chart of the vertical gate selection signal in the first embodiment.

FIG. 11 is a drive timing chart of an application signal of a still picture display region in Example 1. FIG.

12 is a drive timing chart of an applied signal in a row in which a moving image display area exists in Embodiment 1. FIG.

Best Mode for Carrying Out the Invention

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

Example 1

1 is a configuration diagram of a liquid crystal display of Embodiment 1 of the present invention. The interface signal output from the image data generating circuit 11 is input to the signal switching means 12. The drive signal is input from the signal switching means 12 to the display pixel array 111 to display an image. The signal switching means 12 includes a recording signal generating circuit 13, a moving image signal output circuit 18, a still image signal output circuit 16, a moving image vertical direction selecting circuit 15, and a still image vertical direction selecting circuit 14 And a moving picture horizontal direction selecting circuit 19 and a still picture horizontal direction selecting circuit 17. In the display pixel array 111, n unit pixels in the horizontal direction and m unit pixels in the vertical direction are arranged in a matrix form. Since the structure of each unit pixel is the same, a code is written only in the unit pixels of one row and one column. It demonstrates using these below. Each unit pixel is composed of a pixel capacitor 117 made of a TN type liquid crystal or the like, a TFT switch 116 connected thereto, and an AND gate circuit 115 for driving the gate of the TFT switch 116. The AND gate circuit 115 and the TFT switch 116 are manufactured by the CMOS process of the polycrystalline silicon TFT. The other end of the TFT switch 116 is connected to the signal line 113, and the input of the AND gate circuit 115 is connected to the vertical gate select line 112 and the horizontal gate select line 114. The moving picture signal output circuit 18 and the still picture signal output circuit 16 are connected to the signal line 113. In addition, the moving image vertical direction selecting circuit 15 and the still image vertical direction selecting circuit 14 are disposed in the vertical gate selecting line 112, and the moving image horizontal direction selecting circuit 19 is stopped at the horizontal gate selecting line 114. The image horizontal direction selection circuit 17 is connected. Moving picture signal output circuit 18, still picture signal output circuit 16, moving picture vertical direction selecting circuit 15, still picture vertical direction selecting circuit 14, moving picture horizontal direction selecting circuit 19, still picture horizontal direction selecting The circuit 17 is connected to the write signal generation circuit 13, respectively.

The operation of this embodiment will be described below. The signal switching means 12 receives the interface signal including the still image or the moving image image data by the image data generating circuit 11, and sends a recording signal to the display pixel array 111 based on the input image data. The recording signal generation circuit 13 outputs data and an address to each of the moving and still images of the image data. The data of the moving image is output to the moving image signal output circuit 18, and the address is output to the moving image vertical direction selecting circuit 15 and the moving image horizontal direction selecting circuit 19. The still picture data is output to the still picture signal output circuit 16 and the address is output to the still picture vertical direction selection circuit 14 and the still picture horizontal direction selection circuit 17.

In order to record the image data in the unit pixel, the moving image vertical direction selection circuit 15 selects an address in the row direction, and the moving image horizontal direction selection circuit 19 selects an address in which the moving image should be displayed within the selected row. do. As a result, the AND gate circuit 115 of the selected unit pixel is turned on, and the connected TFT switch 116 is turned on. In synchronization with this, the moving image signal output circuit 18 generates a signal voltage to be input to each selected unit pixel and applies it to the signal line 113. This signal voltage is input to the pixel capacitor 117 through the TFT switch 116. Regarding the still picture, the signal recording method is the same as that of the moving picture, and thus the description is omitted here.

In the present embodiment, the data signal voltage of one unit pixel of the moving image to be displayed is input to the unit pixels at the plurality of addresses in order to reduce the resolution of the moving image portion. This is realized by the recording signal generating circuit 13 giving the same signal to a plurality of unit pixels constituting a new pixel from the head address at which the moving image is to be displayed. The new pixel is composed of a plurality of unit pixels arranged side by side in the horizontal direction, y in the horizontal direction, and x in the vertical direction, and are arranged side by side in a row in the horizontal direction and b in the vertical direction.

This moving picture display will be described with reference to FIG. 3 using a display pixel array of 20 rows and 20 columns. The new pixels are labeled M1, 1 through M4, 4 with subscripts in rows and columns. In Fig. 3, the new pixel is composed of nine unit pixels in total of x = 3 and y = 3, and sixteen in total of a = 4 and b = 4 are arranged side by side repeatedly. As is clear from the figure, the unit pixels S5 and 4 positioned in the fifth row and fourth column are in charge of the head address at which the moving image is to be displayed. In addition, in other regions where no moving image is displayed, a very high resolution still image is displayed.

The driving method for realizing the display of FIG. 3 is as follows.

In the liquid crystal display of FIG. 1, the structure figure at the time of making a display pixel array into 20 rows and 20 columns (m = 20, n = 20) is shown in FIG. In FIG. 9, the subscripts 113 and 114 of the signal line 113 and the horizontal gate selection line 114 denote columns, and the subscript 112 of the vertical gate selection line 112 denotes a row. Note that the subscripts 115, 116, and 117 of the AND gate circuit 115, the TFT switch 116, and the pixel capacitor 117, which are components of the unit pixel, indicate rows and columns.

In the image data generation circuit 11, moving picture data and still picture data are generated. They are sent to the signal switching means 12 together with the vertical gate selection signal, the horizontal gate selection signal and the synchronization signal of the AND gate circuit of the unit pixel in which they are displayed. Next, signals of two kinds of image data, a vertical gate selection signal, and a horizontal gate selection signal are sent from the signal switching means 12 to the pixel array 111. In this embodiment, these signals are sent separately into a moving picture and a still picture. In the signal switching means 12, a pulse voltage is generated in the recording signal generating circuit 13, and pulse widths are assigned in the vertical direction selecting circuits 14 and 15 and the horizontal direction selecting circuits 17 and 19. The image signal output circuits 16 and 18 simultaneously output signals of image data.

10 shows a driving timing chart of the vertical gate selection signal. The voltage of the pulse width T is applied to the vertical gate selection line of the region where the still image is displayed, and the voltage of the wide pulse width is applied to the vertical gate selection line of the region where the moving image is displayed. For wide pulse widths, for example, pulses between t = 4T and 7T at the vertical gate select lines 112-5, 112-6 and 112-7 correspond to this. However, as described below with reference to FIG. 12, since it is considered to maintain the resolution of the left and right still picture display areas of the video display area in FIG. 3, these pulses are actually purely pulses having a width of 3T. Is not.

11 is a drive timing chart of an application signal of a still picture display area. In synchronization with the pulse applied to the first vertical gate selection line 112-1, the selection pulses are sequentially applied to the horizontal gate selection lines 114-1 to 114-20. That is, the horizontal gate selection lines 114-1 to 114-20 enter each pulse width t ₀ (= T / 20) in the middle of the pulse width T of the vertical gate selection line 112-1. . When the vertical gate selection line and the horizontal gate selection line are simultaneously selected, image data is recorded in the unit pixels at their intersections. The signal of the image data is applied to the signal lines 113-1 to 113-20 in synchronization with the horizontal gate selection voltage. For example, a signal applied to the signal line 113-1 in synchronization with the gate selection voltage applied to the horizontal gate selection line 114-1 is a signal of image data for the unit pixels S1 and 1. The same signal recording scan is performed in the unit pixels of the second to fourth rows of the display pixel array and the 17th to 20th rows.

12 is a driving timing chart of an application signal in a row in which a moving image display area exists. In Fig. 12, the vertical gate select lines 112-5 to 112-7, the horizontal gate select lines 114-1 to 114-20 and the signal lines 113-1 in a period from t = 4T to 7T. The signal voltage applied to 113-20) is shown. As found from the unit pixels S _{X and Y on} which the image data written in FIG. 12 are recorded and the new pixels Ma and b, the moving image display areas M ₁ , ₁ and M in FIG. _1,2 , M _1,3 , M _1,4 ) and the left and right still picture display areas (S _5,1 to S _5,3 , S _5,16 to S _5,20 , S _6,1) S _6,3, a display is made in S _7,20) from S _7,3, S _{7,16 6,20} from S, S S _7,1 from _6,16.

In addition, in FIG. 12, the signal voltage applied to the vertical gate selection line is not shown in detail as shown in FIG. 10. The pulse width between t = 4T and 7T in the vertical gate selection lines 112-5, 112-6, and 112-7 does not become 3T, and there is a period of turning off therebetween. This does not reduce the resolution of the left and right still picture display areas of the moving picture display area. Therefore, in the still picture display area, the new pixels Ma and b are not treated as one pixel like the moving picture display area. _{X, Y} ) is treated as one pixel.

Hereinafter, the pulse structure of FIG. 12 is demonstrated in detail. First, t = 4T from a period of t = 4T + 3t _0, sequential images of three unit pixels (S _5,1, S _5,2 and S _5,3) of the still picture display area on the left side of the moving image display area, The data is recorded. Therefore, of the three vertical gate selection lines 112-5 to 112-7, only 112-5 is on, and 112-6 and 112-7 are off. At this time, the horizontal gate selection lines 114-1 to 114-3 are sequentially turned on, and the signal lines 113-1 to 113-3 are sequentially turned on in synchronization with this.

Next, the image data is sequentially converted into three new pixels M _1,1 , M _1,2 , M _1,3 and M _1,4 in the moving picture display area in the period of t = 4T + 3t ₀ to 5T-5t ₀ . Is recorded. Therefore, all three vertical gate selection lines 112-5 to 112-7 are turned on. At this time, three horizontal gate selection lines are simultaneously driven (three from 114-4 to 114-6, three from 114-7 to 114-9, three from 114-10 to 114-12, and 114-13 From 114-15 three). In addition, in synchronization with this, three signal lines are also driven simultaneously (three from 113-4 to 113-6, three from 113-7 to 113-9, three from 113-10 to 113-12, and 113-13 From 113-15 three). As a result, for example, when three horizontal gate selection lines 114-4 to 114-6 and three signal lines 113-4 to 113-6 are driven at the same time, image data is written to the new pixels M ₁ and ₁ . do.

Next, in the period of t = 5T-5t ₀ to t = 5T, five unit pixels (S _5,16 , S _5,17 , S _5,18 , S ₅₎ of the still picture display area on the right side of the moving picture display area. _{, 19} and S _5,20 are recorded sequentially. Therefore, only 112-5 out of the three vertical gate selection lines 112-5 is on, and 112-6 and 112-7 are off. At this time, the horizontal gate selection lines 114-16 to 114-20 sequentially turn on, and in synchronization with this, the signal lines 113-16 to 113-20 sequentially turn on.

Subsequently, in the period of t = 5T to t = 6T and the period of t = 6T to t = 7T, referring to the three vertical gate select lines, only 112-6 and 112-7 are turned on during this period, respectively. The image data as described above is recorded. At this time, image data is recorded in different unit pixels alternately by row for the still image display area, but image data is recorded in four identical new pixels for the moving image display area. As a result, the same image data is recorded three times in the same new pixel in the moving image display area. For example, for the new pixel M _1,1 , it is three times in a period of 4T + 3t ₀ to 5T-5t ₀ , 5T + 3t ₀ to 6T-5t ₀ , and 6T + 3t ₀ to 7T-5t ₀ . This is made possible by simultaneously driving nine unit pixels corresponding to the intersections of three rows of vertical gate selection lines and three columns of horizontal gate selection lines, so that the total recording time is long and the image quality is improved.

In addition, in the above description, the pulse width between t = 4T and 7T in the vertical gate selection lines 112-5, 112-6, and 112-7 does not become 3T, and there is a period of turning off therebetween. The reason for doing this was also revealed. In addition, the same driving is performed for other vertical gate select lines other than the vertical gate select lines 112-5 to 112-7.

In the above description, a display pixel array of 20 rows and 20 columns is used, but for example, a display pixel array of 2400 rows and 3200 columns of 400 dots / inch may be used. In that case, if the new pixel is set to x = 5 and y = 5, it becomes almost 80 dots / inch, and sufficient resolution is obtained for a moving image.

Next, the method of supplying voltage to each unit pixel is described. The active matrix described in this embodiment is a so-called point-sequential scanning method in which signal recording to each unit pixel can be made independently. Therefore, it is of course also possible to display moving images by point sequential scanning. However, in a moving picture, a simultaneous selection method of unit pixels constituting a new pixel is preferable. That is, the use of this system is preferable because the time limitation in signal recording is relaxed and the application of voltage to the liquid crystal becomes more certain. Simultaneous selection of the constituent unit pixels causes the selection pulses from the moving picture horizontal direction selecting circuit 19 and the moving picture vertical direction selecting circuit 15 to be the head address at which the moving picture should be displayed, such that the AND gate circuits of the pixels are simultaneously turned on. And y and x in the horizontal and vertical directions, respectively. In this case, if the value of the time interval t ₀ at which the AND gate circuit is turned on is the same as that of the original ultra-high resolution display, the time taken to write one frame in the case of moving image display is

(m · n−x · y · a · b + a · b) · t ₀ = {m · n−a · b (x · y −1)} · t ₀ As a result, the case of m = 3000, n = 3000, a = 500, b = 500, x = 5, y = 5 is reduced by about 30%. This shortened time can be used for extending the AND gate circuit on time and the like, thereby increasing the tolerance of signal recording. 12 shows an example used for extending the AND gate circuit on time. For example, for the new pixels M ₁ and ₁ , when the signal line 113-4 is viewed, nine times as long as the unit pixel is turned on within a period of 7T from t = 4T. That is, it is enlarged nine times.

In the above embodiment, the case where one moving picture display area is surrounded by one still picture display area has been described. However, as long as the moving picture is displayed on the part of the new pixel, the number and arrangement of the still picture or moving picture area are limited. It goes without saying that the present invention is effective regardless. In addition, although the case of monochrome display was dealt with in this embodiment, the present invention is also effective in color display. In this case, the unit pixels of the display pixel array may be composed of at least three dots of RGB.

In addition, in the present embodiment, the case where the refresh timing is the same in the still picture portion and the moving picture portion has been described, but it may be different.

Example 2

Embodiment 2 of the present invention will be described with reference to FIG. 4 is a configuration diagram of a liquid crystal display of Example 2. FIG. Reference numerals in the drawings are the same as those in the first embodiment.

The difference between the present embodiment and the first embodiment is that the first embodiment is the linear sequential driving, whereas the first embodiment is the linear sequential driving. For this reason, this embodiment has the effect that the horizontal direction selection circuit and the AND circuit are unnecessary, and the circuit configuration can be made extremely simple.

In addition, the present embodiment also has the effect of lowering the resolution of the moving picture portion as in the first embodiment. This is realized by giving the same signal to a plurality of unit pixels constituting a new pixel which displays a moving image from the recording signal generation circuit 13. The new pixel is composed of a plurality of unit pixels arranged side by side in the y direction in the horizontal direction and x in the vertical direction, and are arranged side by side repeatedly in the b direction in the horizontal direction and a in the vertical direction. To obtain the signal recording margin, the vertical x vertical gate select lines may be selected simultaneously. In this case, however, the super high resolution is realized only by a and b in the still picture region in FIG. 5, and the resolution decreases by c and d.

Example 3

Embodiment 3 of the present invention will be described with reference to FIG. 6 is a view for explaining the configuration of the polarity of the display image signal in the liquid crystal display device. The configuration of the liquid crystal display device is either one of the first embodiment or the second embodiment.

First, the method of simply driving a conventional liquid crystal is demonstrated. AC voltage is required to drive the liquid crystal. This is because, if a direct current voltage is applied to the liquid crystal layer for a long time, there is a problem in reliability such as destroying the unit pixel. Thus, a voltage having an inverted polarity is applied to the signal electrode every frame time. Therefore, for a frame frequency of 60 Hz, the liquid crystal drive frequency is usually 30 Hz, which is 1/2 of this. As a result, flickers called flickers are seen, making the display difficult to see.

Conventionally, a driving method of inverting the drive signal voltage polarity of adjacent unit pixels in order to reduce flicker has been used. It is (a) of FIG. 6 explaining this. For the n horizontal and m vertical unit pixels, the polarities of the signals applied to the signal electrodes of the unit pixels adjacent to each other and the signal electrodes of the unit pixels vertically adjacent to each other are shown. Vc in Fig. 1 is a potential of the electrode of the pixel capacitor 117 on the side not connected to the TET in Figs. In Fig. 6A, this potential is made constant for simplicity, and the positive polarity and the negative polarity are shown around the same. In practice, the amplitude of the signal also has the meaning of controlling the amount of light passing through the liquid crystal layer, but the information is omitted here.

Next, an example of the configuration of the signal polarity inherent in the present embodiment will be described with reference to FIG. The circuit configuration is point sequential. The signal polarity is the same in all of the unit pixels constituting a new pixel for displaying a moving image. In the figure, the first address to display a moving image is three rows and four columns, the number of vertical pixels and horizontal directions x and y of the unit pixels constituting the new pixel are 9 rows and 15 columns, respectively, where x = 3 and y = 3. The signal is shown. In the moving picture display area, the polarities of the adjacent signals are inverted vertically, horizontally, and for each new pixel. In one still image display area, the polarities of the adjacent signals are vertically reversed for each pixel of the unit as in the conventional art.

According to the present embodiment, the frequency of the signal polarity switching in the moving picture area is lowered, thereby reducing the power consumption.

Example 4

Example 4 of this invention is demonstrated using FIG. 7 is a configuration diagram of the liquid crystal display device of this embodiment. Only the display pixel array portion is used to clarify the difference from FIG.

In this embodiment, the memory function is provided in each unit pixel of the display pixel array. When the unit pixel is addressed, the sampling TFT 120 is also turned on at the same time, and the selection voltage is charged to the sampling capacitor 122 through the newly installed signal line 118 and the sampling TFT 120. In the range where this voltage is greater than or equal to the threshold voltage of the TFT 121, the voltage on one side of the pixel capacitor 117 is held in the newly installed common voltage line 119. In this case, a signal applied to the signal line 113 is effectively applied to the liquid crystal. Moreover, once the unit pixel is selected, there is an effect that the signal is maintained until the next recording. By this memory function, the image refresh frequency of the still picture region, i.e., the frame frequency, can be made smaller than in the case of the normal 30 Hz. In the case of a still picture, even if the refresh frequency is not as frequent as in the case of a moving picture, flicker does not adversely affect this method. Therefore, this method is effective.

According to this embodiment, in addition to lowering power consumption by simultaneously driving a plurality of unit pixels in the moving picture area, lower power consumption can be achieved by reducing the number of refreshes in the still picture area.

Example 5

Embodiment 5 of the present invention will be described with reference to FIG. The display device according to the present embodiment is characterized in that the liquid crystal is used as the pixel capacitance constituting the unit pixel, and the display portion of the new pixel for moving image display is composed of a plurality of liquid crystals.

With this configuration, in addition to the conventional gradation display method of controlling the amount of light that passes through the liquid crystal for each unit pixel by modulating the voltage amplitude applied to the liquid crystal in accordance with the image signal as the gradation control method of the moving image, The method peculiar to this embodiment using the sequential scanning is possible.

According to the method peculiar to this embodiment, the gradation display can be increased as described below. For simplicity, the gradation of the liquid crystal is set to two gradations of black and white. 8A to 8D show black and white arrangement in four kinds of gradation display of a liquid crystal display of a new pixel composed of 25 unit pixels in total of 5 × 5. The unit pixel with gray is white and the unit pixel with black is hatched. (A), (b), and (c) of FIG. 8 are cases where one, five, and nine white unit pixels are provided in gray scale, respectively.

Therefore, when gradation is determined by the total amount of light passing through the liquid crystal constituting the new pixel, in the case of Fig. 8, all 25 unit pixels are from black and white arrangement to all 25 unit pixels are white and monochrome arrangement 26 types of gradation display are possible.

In the case of the same gradation, it is considered that plural kinds of monochrome arrangements are used. For example, FIGS. 8A and 8D show the same gray level with five white unit pixels, but the black and white arrangement differs as shown in the drawing. The black and white arrangement may be selected from the viewpoint of display characteristics such as its symmetry.

As described above, according to the method peculiar to the present embodiment, it is possible to effectively increase the gradation display to one bit more than four bits.

In the present embodiment, the light amount transmitted through the liquid crystal is shown as the amount of light emitted from the unit pixel. However, a light emitting element using a phosphor such as a cathode ray tube may be used for the unit pixel. In this case, the amount of light emitted from each of the unit pixels is determined by the amount of emitted light of the phosphor. The total sum of the amount of emitted light from each unit pixel is the amount of emitted light from the new pixel.

Claims (18)

A display device comprising image display means comprising a plurality of unit pixels arranged in a vertical and a horizontal direction, And a signal switching means for driving a new pixel consisting of a plurality of consecutive unit pixels. According to claim 1, An area other than the area displayed by the new pixel can be displayed by the unit pixel, and the display can be switched by the signal switching means. The method of claim 2, And the unit pixel is made of liquid crystal. The method of claim 3, wherein And the polarity of the voltage applied to the liquid crystal constituting the new pixel can be inverted between the adjacent new pixels in the horizontal direction, and the inversion is made of the signal switching means. The method of claim 4, wherein And the liquid crystal is in twisted nematic (TN) mode. The method of claim 2, And in the region displayed by the new pixel and the region displayed by the unit pixel, the frame frequency of the display can be different, and the switching of the frame frequency is performed by the signal switching means. The method of claim 6, And the unit pixel has a memory function. The method of claim 7, wherein And the unit pixel is made of liquid crystal. The method of claim 8, And the polarity of the voltage applied to the liquid crystal constituting the new pixel can be inverted between the adjacent new pixels in the horizontal direction, and the inversion is made of the signal switching means. The method of claim 9, And the liquid crystal is in TN mode. The method of claim 2, And a plurality of the unit pixels constituting the new pixel can be driven simultaneously, and the driving is performed by the signal switching means. The method of claim 11, And the unit pixel is made of liquid crystal. The method of claim 12, And the polarity of the voltage applied to the liquid crystal constituting the new pixel can be inverted between the adjacent new pixels in the horizontal direction, and the inversion is made of the signal switching means. The method of claim 13, And the liquid crystal is in TN mode. The method of claim 2, The amount of emitted light from each of the plurality of unit pixels constituting the new pixel can be varied, and the setting of the amount of emitted light is made by the signal switching means, and the total sum of the amount of emitted light from the unit pixel is equal to the new amount. A display device comprising the amount of emitted light from a pixel. The method of claim 15, And the unit pixel is made of liquid crystal. The method of claim 16, And the polarity of the voltage applied to the liquid crystal constituting the new pixel can be inverted between the adjacent new pixels in the horizontal direction, and the inversion is made of the signal switching means. The method of claim 17, And the liquid crystal is in TN mode.