JP2020064242A - Display device - Google Patents

Abstract

To provide a display device that realizes power saving without incurring a decrease in display quality.SOLUTION: Provided is a display device comprising: main pixel PXL composed of sub-pixels SPXL_R, SPXL_G, SPXL_B, with same type arranged in a first direction X and different type arranged in a second direction Y alternately; a gate wiring group including a plurality of gate wirings GL; a source wiring group including a plurality of source wirings SGL; a pixel line consisting of a row of main pixels in the first direction, for opening/closing, with a single line of the gate wiring, a switching element SW provided in the sub-pixels; and a display drive unit for generating a video signal that is written into each sub-pixel and supplying the video signal to each sub-pixel via the source wiring. In a one-frame period, the polarities of video signals supplied to the source wirings are the same and the polarities of video signals supplied to the adjacent source wirings are opposite.SELECTED DRAWING: Figure 5

Description

  Embodiments of the present invention relate to a display device.

    Generally, in a liquid crystal display device, due to the relationship between the polarities of adjacent pixels and the alignment direction of the liquid crystal molecules, a lateral electric field different from the originally required direction exerts an influence on the liquid crystal molecules, and when various conditions overlap, In some areas, misalignment (disclination) of liquid crystal molecules may occur. Specifically, in the case of a liquid crystal display device using a mode such as electric field controlled birefringence (ECB), it causes various display defects such as an afterimage when an image is displayed, blurring, and a decrease in contrast ratio. Efforts to eliminate it are necessary.

    Even if disclination occurs, the above problem can be solved once if the occurrence location is shielded from light, but another problem of lowering the aperture ratio occurs. As a means for solving such a problem, a method of adjusting the liquid crystal alignment direction so that disclination does not occur (Patent Document 1 or the like) and a selection of a driving method for optimizing the polarity direction between pixels (Patent Document 2 and 3) and the like, there is known a method of connecting a pixel and a wiring (Patent Document 4), etc., in which the optimum design is selected for the liquid crystal orientation and the driving, and the polarity between adjacent pixels is optimized.

    From the viewpoint of power consumption, column inversion drive is more suitable than line inversion and dot inversion, but when the rubbing direction of the optical optimum condition of the electric field control birefringence (ECB) mode of the reflection type liquid crystal display device is set, In some cases, the influence of the lateral electric field between the pixels is large and the disclination may occur. In order to solve the above-mentioned problem, for example (Patent Document 4), in addition to the connection method between the wiring and the pixel power, the problem is solved by devising a signal transmission method according to the connection method. However, in this case, because the arrangement of signals when sending is different from that of normal RGB pixels, it is necessary to newly prepare a dedicated drive driver IC and also have an internal memory, so a general-purpose driver with high cost competitiveness There is a problem that the IC and the existing driver IC cannot be used.

JP-A-2002-62536 JP, 2004-118048, A JP, 2011-227140, A JP, 2016-184098, A

  An object of this embodiment is to improve the display quality and save power, and to provide a simpler and more cost-competitive display device.

According to this embodiment,
A main pixel including sub-pixels of the same type in the first direction and different types alternately arranged in the second direction, a gate wiring group including a plurality of gate wirings, a source wiring group including a plurality of source wirings, and one The gate wiring opens and closes the switching element provided in the sub-pixel, the pixel line in which the main pixels are arranged in the first direction, and the video signal to be written to each sub-pixel are generated, A display driving unit that supplies a video signal to the sub-pixels, and the polarity of the video signal supplied to each of the source lines is the same in one frame period, and is supplied to each of the adjacent source lines. A display device is provided in which the polarities of the video signals are reversed.

FIG. 1 is a schematic view showing a cross section of a liquid crystal display device. FIG. 2 is a diagram for explaining the shape of the main pixel PXL, the voltage polarity of the sub-pixel SPXL, and the relationship between the alignment treatment direction RD_TFT of the first alignment film and the alignment treatment direction RD_CF of the second alignment film. FIG. 3 is a graph for explaining the relationship between the applied voltage and the reflectance of the liquid crystal display device in the normally white mode and the normally black mode, respectively. FIG. 4 is a diagram for explaining the relationship between equipotential lines and liquid crystal alignment directions between main pixels when a voltage is applied in a normally white mode liquid crystal display device. FIG. 5 shows the relationship between the form of the main pixel PXL, the voltage polarity of the sub-pixel SPXL, the connection between the pixel electrode PEL and the signal line SGL, the alignment treatment direction RD_TFT of the first alignment film and the alignment treatment direction RD_CF of the second alignment film, It is a figure for explaining and. FIG. 6 shows the relationship between the form of the main pixel PXL, the voltage polarity of the sub-pixel SPXL, the connection between the pixel electrode PEL and the signal line SGL, the alignment treatment direction RD_TFT of the first alignment film and the alignment treatment direction RD_CF of the second alignment film, It is a figure for explaining and. FIG. 7 shows the relationship between the form of the main pixel PXL, the voltage polarity of the sub-pixel SPXL, the connection between the pixel electrode PEL and the signal line SGL, the alignment treatment direction RD_TFT of the first alignment film and the alignment treatment direction RD_CF of the second alignment film, It is a figure for explaining and. FIG. 8 is a diagram for explaining the form of the main pixel PXL, the voltage polarity of the sub pixel SPXL, and the connection between the pixel electrode PEL and the signal line SGL. FIG. 9 is a diagram for explaining the form of the main pixel PXL, the voltage polarity of the sub pixel SPXL, the connection between the pixel electrode PEL and the signal line SGL, and the arrangement of the video signals sent to the signal line SGL. FIG. 10 is a diagram for explaining the form of the main pixel PXL, the voltage polarity of the sub-pixel SPXL, the connection between the pixel electrode PEL and the signal line SGL, and the arrangement of the video signals sent to the signal line SGL. FIG. 11 is a diagram for explaining the form of the main pixel PXL, the voltage polarity of the sub-pixel SPXL, the connection between the pixel electrode PEL and the signal line SGL, and the arrangement of video signals sent to the signal line SGL. FIG. 12 illustrates the form of the main pixel PXL, the voltage polarity of the sub-pixel SPXL, the connection between the pixel electrode PEL and the signal line SGL, the black matrix that shields light between the main pixels PXL, and a part of the periphery thereof. FIG. FIG. 13 is a diagram for explaining the form of the main pixel PXL, the voltage polarity of the sub-pixel SPXL, the connection between the pixel electrode PEL and the signal line SGL, and the pixel electrode PEL partially formed of a transparent electrode. Is. FIG. 14 is a diagram for specifically explaining an example of an electronic device using the display device of the present embodiment. FIG. 15 is a diagram for specifically explaining an example of an electronic device using the display device of the present embodiment.

    Hereinafter, embodiments for carrying out the invention will be described in detail with reference to the drawings. The present invention is not limited to the contents described in the embodiments below. Further, the constituent elements described below include those that can be easily conceived by those skilled in the art and those that are substantially the same. Furthermore, the components described below can be combined as appropriate. It should be noted that the disclosure is merely an example, and a person skilled in the art can easily think of appropriate modifications while keeping the gist of the invention, and are naturally included in the scope of the invention. Further, in order to make the description clearer, the drawings may schematically show the width, thickness, shape, etc. of each part as compared with the actual mode, but this is merely an example, and the interpretation of the present invention will be understood. It is not limited.

A liquid crystal display device is disclosed as an example of the display device of the present embodiment. The liquid crystal display device can be used in various devices such as a wearable terminal, a smartphone, a tablet terminal, a mobile phone terminal, a personal computer, a television receiver, an in-vehicle device, and a game machine.

    FIG. 1 is a cross-sectional view showing a configuration example of a display device according to an embodiment. As shown in FIG. 1, the display device 13 includes a first panel 15, a second panel 14, and a liquid crystal layer 8. The second panel 14 is arranged so as to face the first panel 15. The liquid crystal layer 8 is provided between the first panel 15 and the second panel 14. The surface of the second panel 14 is a display surface 1a for displaying an image. Light incident from the outside on the display surface 1a side is reflected by the reflective electrode 9 of the first panel 15 and emitted from the display surface 1a. The display device 13 of the present embodiment is a reflection type liquid crystal display device that utilizes this reflected light to display an image on the display surface 1a. In the present specification, the direction parallel to the display surface 1a is the X direction, and the direction intersecting the X direction on the surface parallel to the display surface 1a is the Y direction. Further, the direction perpendicular to the display surface 1a is the Z direction.

    The first panel 15 includes a first substrate 12, an insulating layer 11, a reflective electrode 10, and an alignment film 9. As the first substrate 12, for example, a glass substrate or a resin substrate is used. On the surface of the first substrate 12, various wirings such as circuit elements and gate wirings and signal wirings (not shown) are provided. The circuit element includes a capacitive element and a switching element such as a TFT (Thin Film Transistor). The TFT may be formed of any of amorphous silicon (Amorphous Si), low-temperature polysilicon LTPS (Low Temperature Poly Si), transparent amorphous oxide semiconductor TAOS (Transparent Amorphous Oxide Semiconductor), and the like.

    The insulating layer 11 is provided on the first substrate 12 and has a function of flattening the surfaces of circuit elements, various wirings, and the like. The reflective electrode 9 is provided on the insulating layer 11, and the alignment film 9 is provided between the reflective electrode 10 and the liquid crystal layer 8. The reflective electrode 9 may have a configuration in which a metal such as aluminum (Al) or silver (Ag), or a metal material thereof and a light-transmitting conductive material such as ITO (Indium Tin Oxide) are stacked. The reflection electrode 10 functions as a reflection plate that reflects light incident from the outside.

    The light reflected by the reflective electrode 10 travels toward the display surface 1a in a certain direction. The reflective electrode 10 is provided corresponding to each sub-pixel of R (red), G (green), and B (blue), and the liquid crystal layer 8 is changed by changing the voltage level applied to the reflective electrode 10. The retardation changes in, and as a result, the light transmission state is adjusted for each sub-pixel. That is, the reflective electrode 10 also has a function as a pixel electrode. Although the reflective electrode 10 and the insulating layer 11 are shown to be flat in FIG. 1, the surface of the insulating film 11 may be uneven so as to be diffused and reflected.

    The second panel 14 includes a second substrate 4, a color filter 5, an overcoat 16, a common electrode 6, an alignment film 7, a quarter wavelength plate 3, a half wavelength plate 2, and a polarizing plate 1. Including and The color filter 5, the overcoat 16, and the common electrode 6 are provided on the surface of the second substrate 4 facing the first panel 15. An alignment film 7 is provided between the common electrode 6 and the liquid crystal layer 8. The quarter-wave plate 3, the half-wave plate 2, and the polarizing plate 1 are laminated in this order on the surface of the second substrate 4 on the display surface 1a side. In this embodiment, the condition of the broadband circular polarizing plate made up of the combination of the quarter-wave plate 3 and the half-wave plate 2 is illustrated, but the configuration of only the quarter-wave plate 3 is also possible. I do not care. Although not illustrated in this embodiment, an isotropic or anisotropic diffusion layer is provided at a position adjacent to any one of the quarter wave plate 3, the half wave plate 2 and the polarizing plate 1. It may be one that has been submitted.

    The second substrate 4 is a glass substrate or a resin substrate, and the common electrode 6 is formed of a translucent conductive material such as ITO. The common electrode 6 is arranged to face the plurality of reflective electrodes 9 and supplies a common potential to each subpixel. The color filter 5 has, for example, three filters of R (red), G (green), and B (blue), but may include four or more different color filters. The overcoat 16 is a flat insulating layer and is provided on the liquid crystal layer 8 side of the color filter 5.

    The liquid crystal layer 8 has, for example, a nematic liquid crystal enclosed in a liquid crystal cell. In the liquid crystal layer 8, the voltage level between the common electrode 6 and the reflective electrode 10 is changed, so that the retardation of each sub-pixel is modulated, and as a result, the light of each sub-pixel is modulated.

    Incident light entering from the display surface 1a side of the display device 13 passes through the second panel 14 and the liquid crystal layer 8 and reaches the reflective electrode 10. Then, the incident light is reflected by the reflective electrode 10. The light reflected by the reflective electrode 10 passes through the liquid crystal layer 8, is modulated for each sub-pixel, and is emitted from the display surface 1a. As a result, the image is displayed.

    As described above, the display device 13 is a reflective liquid crystal display device that reflects light by the reflective electrode 10. In addition, the display device 13 does not have a light source such as a front light or a back light, assuming that the display is performed by reflecting external light, but the display device 13 is visually recognized in a dark place where external light cannot be used. In order to secure the property, a light source such as a front light or a backlight may be provided. In this case, the front light is provided on the display surface 1a side of the second panel 14. The backlight is provided on the back surface of the first panel 15, that is, on the opposite side of the first panel 15 from the liquid crystal layer 8. When a backlight is used, the light from the backlight passes between the reflective electrodes 10 and reaches the display surface.

    In FIG. 2A, the relationship between the alignment treatment direction RD_TFT of the alignment film 10 and the alignment treatment direction RD_CF of the alignment film 7 will be described. Here, the directions parallel to the short side direction and the long side direction of the display device 13 are referred to as a first direction X and a second direction Y, respectively. The angle formed by the alignment processing direction RD_TFT and the first direction X is φ, and the twist angle of the liquid crystal molecules defined by the alignment processing directions RD_TFT and RD_CF is φ. Assuming that the rotation direction counterclockwise from the first direction X is positive and the clockwise direction is negative, specifically, φ has an angle of about −160 degrees and ψ has an angle of about 60 to 70 degrees. At this time, the average alignment direction of the liquid crystal molecules is parallel to the first direction X and near the negative direction. This alignment treatment may be rubbing treatment, optical alignment, or ion beam alignment treatment. The main pixels PXL are periodically arranged in the display device 18, and include the sub-pixels SPXL_R, SPXL_G, and SPXL_B, and are arranged in parallel to the first direction X.

With reference to FIG. 2, FIG. 3, and FIG. 4, the problems that have led to the present invention will be described from the panel driving method, the polarity between adjacent sub-pixels, and the liquid crystal alignment relationship. 2B and 2C illustrate the relationship between the panel driving method and the polarities of the adjacent sub-pixels. The scanning line that selects the sub-pixels in each row is in the first direction X in each sub-pixel. The signal line for transmitting the image signal is arranged in a direction parallel to the second direction Y. 3A and 3B are VR curves showing the relationship of the reflectance R with respect to the voltage V. FIG. 3A shows a normally white mode, and FIG. 3B shows a normally black mode. The case is shown. The normally white mode has an optical design in which the white alignment is displayed in the initial alignment state of the liquid crystal molecules when no voltage is applied, and when the voltage is applied, the liquid crystal molecules switch due to the action of the electric field to change the retardation and display black. On the contrary, in the normally black mode, black is displayed when no voltage is applied, and white is displayed when voltage is applied. FIGS. 4A and 4B show how the liquid crystal molecules are aligned in a direction orthogonal to the equipotential lines 17 due to the relationship between the equipotential lines 17 and the liquid crystal molecule alignment between adjacent subpixels when a voltage is applied. ing.

FIG. 2B shows a relationship of polarities between the sub-pixels in the case of column inversion driving, in which the sub-pixels are adjacent to each other with the same polarity in the direction aligned with the second direction Y and the opposite polarity in the first direction X. ing. In this case, due to the combination with the liquid crystal alignment direction under the rubbing conditions shown in FIG. 2A, disclination occurs at the position indicated by DL in FIG. 2B, especially when displaying black in normally white mode. However, there is a problem that the contrast is lowered due to light leakage at the location. As shown in FIG. 3A, when a black display is performed in the normally white mode, an electric field is applied to the liquid crystal, and when the liquid crystal alignment shown in FIG. FIG. 4B is a cross-sectional view showing the relationship between the electric field strength distribution in the first direction X direction and the liquid crystal molecule alignment between the sub-pixels. When the polarities of the adjacent sub-pixels are different from each other, there is a local rapid change in the potential, and the tilt direction of the liquid crystal molecules at the location is reversed to the opposite direction to the metastable state. Is the disclination.

FIG. 2C shows the polarities between the sub-pixels during the line inversion drive. As shown in FIG. 4A, since the sub-pixels have the same polarity in the first direction X and are adjacent to each other, the local electric field intensity change in the lateral direction is relatively small, and thus disclination does not occur. Further, the second directions Y are adjacent with opposite polarities, and the relationship between the equipotential lines 17 and the liquid crystal molecule alignment in that case is shown in FIG. 4B shows the same electric field intensity distribution as that of FIG. 4B, but since the initial liquid crystal alignment direction is the direction orthogonal to the paper surface of FIG. 4C, it is assumed that the alignment direction of the liquid crystal molecules changes according to the electric field intensity distribution. Also, within the range of elastic deformation of the liquid crystal, the tilt angle does not reverse and the metastable state does not occur.

FIG. 5 shows an embodiment of the present invention based on the recognition of the above problems. As shown in FIGS. 5A and 5B, among the sub-pixels SPXL that form the main pixel PXL, those of the same type are arranged in the direction of the first direction X, and the first sub-pixel, the second sub-pixel, The third sub-pixel has a so-called horizontal stripe structure in which different kinds of pixels are alternately arranged. The positional relationship of the main pixel PXL with respect to the display device 18 is shown in FIG. Here, the driving of the signal line SGL is still the column inversion, and the switching element SW such as three TFTs around one main pixel PXL is opened / closed by one gate wiring GL. In the main pixel PXL in the row in which the gate line GL is selected, the signal of the signal line SGL is written in the pixel electrode PEL through the contact hole CON. In the case of the configuration shown in FIGS. 5A and 5B, the polarity relationship of the signal line SGL is the same as that of FIG. 2B, but the polarity relationship between adjacent sub-pixels is different. At this time, when the alignment treatment shown in FIG. 2A is performed, in the case of the configuration of FIG. 5A, there is one disclination DL per main pixel PXL, and there is one disclination DL. It is possible to suppress it to one-third of that shown in FIG. As a result, light leakage due to the disclination DL is reduced, and the reduction in contrast is also alleviated. Alternatively, since the area of the non-opening portion for shielding the disclination DL can be reduced, the reflectance can be improved.

    FIG. 6 shows another embodiment for achieving the same effect as that of FIG. As shown in FIG. 6A, the first subpixel, which is one of the subpixels SPXL in the main pixel PXL, is continuously and adjacently arranged in the direction of the first direction X, and the second subpixel and the third subpixel are arranged. Subpixels are characterized in that different ones are always adjacent to each other. Here, an embodiment is disclosed in which SPXL_R, SPXL_G, and SPXL_B that are R (red), G (green), and B (blue) subpixels are a first subpixel, a second subpixel, and a third subpixel, respectively. However, the arrangement of the colors is not limited to the order of the present disclosure, and another arrangement may be used. FIG. 6C shows the positional relationship of the main pixel PXL with respect to the display device 18 at this time. In the main pixel PXL, the second sub-pixel and the third sub-pixel have the same polarity, and both have a different polarity from the first sub-pixel. Therefore, the pixel electrode PEL and the signal line as shown in FIG. It has an SGL connection form. In this case as well, when the alignment treatment shown in FIG. 2 (A) is performed, and in the case of the configuration of FIG. 5 (A), there is one disclination DL per main pixel PXL. It is possible to make it one-third of FIG. 2B generated for each sub-pixel. As a result, light leakage due to the disclination DL is reduced, and the reduction in contrast is also alleviated. Alternatively, since the area of the non-opening portion for shielding the disclination DL can be reduced, the reflectance can be improved.

In the embodiment shown in FIG. 7, the main pixel PXL is rotated counterclockwise by 90 degrees as compared with the configuration disclosed in FIG. 6, but it is essentially the same as the configuration disclosed in FIG. The effect of is obtained.

    FIG. 8 shows an embodiment at the time of column inversion in which two signal lines SGL having the same polarity are continuously inverted and then inverted. As shown in FIG. 8A, the shape of the main pixel PXL is the same as that of FIG. 6, but as shown in FIG. 8B, the signal line SGL and the pixel electrode PEL are differently connected to each other. The polar relationship between the sub-pixels is different. As a result, it is possible to suppress the occurrence of the disclination DL at a rate of one in two pixels in the direction of the first direction X. Therefore, as compared with the embodiment shown in FIG. 6, it is possible to further reduce the occurrence of disclination DL by half, so that it is possible to further improve the contrast or the reflectance. .

    FIG. 9 shows an example of an embodiment having a horizontal stripe structure, which is column inversion in which two inversions of the signal line SGL having the same polarity are consecutively repeated and then inversion is repeated. By performing the wiring having the structure shown in FIG. 9B, the polarity relationship between the sub-pixels shown in FIG. 9A is obtained, and the disclination DL is generated accordingly. Unlike the form shown in the embodiment of FIGS. 5 to 7, the disclination DL generated in the configuration of FIG. 9 does not continuously occur in the second direction Y but discretely.

    FIG. 10 shows an example of an embodiment having a horizontal stripe structure, which is column inversion in which inversion is repeated after three consecutive signal lines SGL having the same polarity are consecutive. By performing the wiring having the structure shown in FIG. 10B, the polarity relationship between the sub-pixels shown in FIG. 10A is obtained, and the disclination DL is generated accordingly.

FIG. 11 shows an embodiment characterized in that the arrangement of signal data to be sent is changed for each gate wiring, which is different from the embodiments shown in FIGS. As shown in FIG. 11C, when the gate line GL1 is selected, data of signals R (red), G (green), B (blue), ... Is transmitted to the signal lines SGL1, SGL2, SGL3 ,. To be Considering the main pixel PXL1, data is written in the sub-pixels SPXL_R, SPXL_G, and SPXL_B through the switch SW and the contact hole CON, respectively. Next, when the gate line GL2 is selected, unlike the normal case, as shown in FIG. 10C, the signal lines SGL1, SGL2, SGL3, ... Are now B (blue) and the signal R (red). , G (green), ... Data is sent. At this time, writing of data to the main pixel PXL2 is performed through the signal lines SGL2, SGL3, and SGL4. When the gate lines on the next and subsequent rows are selected, data writing is repeated by sending data in the same arrangement as when selecting the gate lines GL1 and GL2. As shown in FIG. 11A, since the adjacent sub-pixels have completely opposite polarities, it is possible to further improve the level of flicker and the like while realizing high contrast or high reflectance.

FIG. 12 shows an embodiment in which the disclination-occurring portion is covered with the light-shielding region BM. The shape of the main pixel PXL shown in FIG. 12 and the connection method with the signal line SGL are the same as those in the embodiment of FIG. 5, but the influence of light leakage due to disclination is avoided because the light-shielding region BM is formed. It becomes possible to do. When the light-shielding area BM is provided, the aperture ratio is lowered and the reflectance is also lowered. However, in comparison with the configuration shown in FIG. 2B, in the embodiment of FIG. Can be reduced to 1/3, so that it is possible to further suppress the decrease in reflectance. The present embodiment can be applied not only to the configuration disclosed in FIG. 5 but also to the configurations disclosed in FIGS. 6 to 11. The light shielding region BM is formed in the second panel 14 and is made of a black resin, a metal such as Cr, or an oxide.

FIG. 13 shows another embodiment for avoiding the influence of disclination. In this embodiment, the portion where the disclination occurs is not hidden by the light-shielding region BM, but is replaced with the pixel electrode PEL_T made of a transparent conductor in addition to the pixel electrode PEL_M made of metal. By doing so, the light incident from the outside is transmitted as it is without being reflected by the pixel electrode PEL_T. Therefore, although the disclination DL is generated, it is not visually recognized, and the influence on the contrast reduction can be eliminated. It will be possible. The position where the disclination DL occurs is determined by the distance from the pixel electrode end. Since the pixel electrode PEL_T formed of a transparent electrode such as ITO (Indium Tin Oxide) is formed on the first panel 15, the pixel electrode PEL_T has variations in production as compared with the light-shielding region BM formed on the second panel 14. There is no effect of misalignment. Therefore, the reflection ineffective region can be made smaller, so that the reflectance can be improved as compared with the system using the light shielding region BM.

    14 and 15 specifically show examples of electronic devices using the display device of the present embodiment. An example shown in FIG. 14 is a notebook computer, which uses the display device of the present embodiment to secure a certain level of image quality and is significantly lower than when a conventional transmissive liquid crystal display is used. It becomes possible to realize power consumption reduction. In the case of the tablet shown in FIG. 15 as well, since it is portable, it is desirable to reduce power consumption for long-term use. Even in this case, by adopting the display device of this embodiment for the screen SCR, It is possible to bring out a remarkable effect.

    As described above, according to this embodiment, it is possible to provide a display device capable of improving display quality and saving power.

    Although some embodiments of the present invention have been described, these embodiments are presented as examples and are not intended to limit the scope of the invention. These novel embodiments can be implemented in various other forms, and various omissions, replacements, and changes can be made without departing from the spirit of the invention. These embodiments and modifications thereof are included in the scope and the gist of the invention, and are also included in the invention described in the claims and the equivalent scope thereof.

PXL ... Main pixel SPXL_R ... Red subpixel, SPXL_G ... Green subpixel, SPXL_B ... Blue subpixel RD_TFT ... First substrate rubbing direction, RD_CF ... Second substrate rubbing direction SGL ... Signal line, SW ... Switching element, CON ... Contact hole GL ... Gate wiring, PEL ... Pixel electrode, DL ... Disclination line BM ... Black matrix, SCR ... Screen

Claims (14)

A main pixel including sub-pixels in which the same type in the first direction and different types in the second direction are alternately arranged;
A gate wiring group including a plurality of gate wirings,
A source wiring group including a plurality of source wirings,
A pixel line in which the main pixels are arranged in the first direction, which opens and closes the switching element provided in the sub-pixel by the one gate wiring;
A display driving unit that generates a video signal to be written in each sub-pixel and supplies the video signal to each sub-pixel via the source wiring,
A display device in which the polarities of the video signals supplied to the source lines are the same and the polarities of the video signals supplied to the adjacent source lines are opposite in one frame period. The sub-pixels adjacent to each other in different polarities in the first direction,
The display device according to claim 1, wherein main pixels including the sub-pixels having the polarity relationship are repeatedly arranged in the second direction. The sub-pixels adjacent to each other in polarities different from each other in both the first direction and the second direction,
A first pixel line including a main pixel composed of the sub-pixels arranged in a first direction;
A second pixel line having a polarity different from that of the first pixel line,
The source wiring required for outputting the video signal is used for the first sub-pixel, the second sub-pixel, and the third sub-pixel of the first pixel line, and the sub-pixel of a color different from that of the first pixel line is used for the second pixel line. The display device according to claim 1, which outputs a video signal. A main pixel including sub-pixels in which the same type in the first direction and different types in the second direction are alternately arranged;
A gate wiring group including a plurality of gate wirings,
A source wiring group including a plurality of source wirings,
A pixel line in which the main pixels are arranged in the first direction, which opens and closes the switching element provided in the sub-pixel with one gate wiring;
A display driving unit that generates a video signal to be written in each sub-pixel and supplies the video signal to each sub-pixel via the source wiring,
In one frame period, the polarities of the video signals supplied to each of the source lines are the same, and the video signals supplied to each of the adjacent source lines are inverted after two identical polarities are continuous. A display device that repeats that. A main pixel including sub-pixels in which the same type in the first direction and different types in the second direction are alternately arranged;
A gate wiring group including a plurality of gate wirings,
A source wiring group including a plurality of source wirings,
A pixel line in which the main pixels are arranged in the first direction, which opens and closes the switching element provided in the sub-pixel with one gate wiring;
A display driving unit that generates a video signal to be written in each sub-pixel and supplies the video signal to each sub-pixel via the source wiring,
In one frame period, the polarities of the video signals supplied to each of the source lines are the same, and the video signals supplied to each of the adjacent source lines are inverted after three consecutive same polarities. A display device that repeats that. A first sub-pixel which is continuously and adjacently arranged in the first direction or the second direction, and a second sub-pixel and a third sub-pixel in which different colors are always adjacently arranged,
A gate wiring group including a plurality of gate wirings,
A source wiring group including a plurality of source wirings,
A pixel line in which the main pixels are arranged in the first direction, which opens and closes the switching element provided in the sub-pixel with one gate wiring;
A display driving unit that generates a video signal to be written in each sub-pixel and supplies the video signal to each sub-pixel via the source wiring,
A display device in which the polarities of the video signals supplied to the source lines are the same and the polarities of the video signals supplied to the adjacent source lines are opposite in one frame period. The second sub-pixel and the third sub-pixel having the same polarity;
The main pixel including the first sub-pixel having a polarity different from that of the second and third sub-pixels,
Has a polarity different from that of the main pixels adjacent in the first direction,
The display device according to claim 6, wherein the main pixels adjacent to each other in the second direction have the same polarity and are repeatedly arranged. A first sub-pixel continuously arranged adjacent to each other in the first direction or the second direction, a second sub-pixel and a third sub-pixel in which different colors are always arranged adjacent to each other,
A gate wiring group including a plurality of gate wirings,
A source wiring group including a plurality of source wirings,
A pixel line in which the main pixels are arranged in the first direction, which opens and closes the switching element provided in the sub-pixel with one gate wiring;
A display driving unit that generates a video signal to be written in each sub-pixel and supplies the video signal to each sub-pixel via the source wiring,
In one frame period, the polarities of the video signals supplied to each of the source lines are the same, and the video signals supplied to each of the adjacent source lines are inverted after two identical polarities are continuous. A display device that repeats that.   The display device according to claim 1, wherein each of the sub-pixels includes a reflective electrode. A first substrate including the reflective electrode and a first alignment film covering the reflective electrode;
A second substrate having a common electrode facing the reflective electrode, and a second alignment film covering the common electrode;
A liquid crystal layer held between the first substrate and the second substrate,
10. The first alignment treatment direction of the first alignment film intersects the second alignment treatment direction of the second alignment film, and intersects the first direction at an angle of −140 ° to −170 °. Display device according to. The display device according to claim 10, wherein a region that shields light between the main pixels or between the sub-pixels and a part of a peripheral portion thereof is provided on the second substrate. The display device according to claim 10, wherein a part of the reflective electrode on the first substrate is formed of a transparent electrode. A main pixel including sub-pixels in which the same type in the first direction and different types in the second direction are alternately arranged;
A gate wiring group including a plurality of gate wirings,
A source wiring group including a plurality of source wirings,
A pixel line in which the main pixels are arranged in the first direction, which opens and closes the switching element provided in the sub-pixel by the one gate wiring;
A display driving unit that generates a video signal to be written in each sub-pixel and supplies the video signal to each sub-pixel via the source wiring,
An electronic device including a display device in which a polarity of a video signal supplied to each of the source lines is the same and a polarity of a video signal supplied to each of the adjacent source lines is opposite in one frame period. machine. A first sub-pixel which is continuously and adjacently arranged in the first direction or the second direction, and a second sub-pixel and a third sub-pixel in which different colors are always adjacently arranged,
A gate wiring group including a plurality of gate wirings,
A source wiring group including a plurality of source wirings,
A pixel line in which the main pixels are arranged in the first direction, which opens and closes the switching element provided in the sub-pixel with one gate wiring;
A display driving unit that generates a video signal to be written in each sub-pixel and supplies the video signal to each sub-pixel via the source wiring,
An electronic device including a display device in which a polarity of a video signal supplied to each of the source lines is the same and a polarity of a video signal supplied to each of the adjacent source lines is opposite in one frame period. machine.