JP6395903B2 - Display device - Google Patents

Description

  The present disclosure relates to a display device, and is applicable to a display device having an in-cell touch panel, for example.

  In recent years, a liquid crystal display device for mobile use has introduced a capacitive touch panel as an input function mainly for smartphones. Furthermore, this capacitive touch panel is being promoted to be in-cell that incorporates its function in the liquid crystal display device. A common electrode having an FFS (fringe field switching) structure is utilized in the in-cell structure. The common electrode is formed of ITO (Indium Tin Oxide) on a TFT (Thin Film Transistor) glass substrate and also serves as a drive electrode for the touch panel. The detection electrode is formed of ITO on the back surface of a CF (Color Filter) glass substrate.

  In Japanese Patent Application Laid-Open No. 2009-244958 (Patent Document 1), the common electrode divided in the gate line direction is combined with the detection electrode divided in the source line direction to realize the function of the touch panel. In addition, as a dividing direction of the common electrode, there is a method of dividing in the source line direction as disclosed in Japanese Patent Application Laid-Open No. 2010-231773 (Patent Document 2) and International Publication No. 2012/073792 (Patent Document 3). .

JP 2009-244958 A JP 2010-231773 A International Publication No. 2012/073792

The inventor of the present application has found that there are the following problems when the common electrode wiring layer is divided in the direction of the source wiring layer.
When the common electrode wiring layer is divided in the direction of the gate wiring layer, it is in contact with the common electrode wiring layer for the purpose of reducing the resistance of the common electrode wiring layer, and is below the BM (black matrix) on all the source wiring layers. When the metal wiring layer is disposed at the position, it is possible to prevent viewing angle color mixing that occurs when the TFT glass substrate and the CF glass substrate are misassembled. However, when the common electrode wiring layer is divided in the source wiring layer direction, the metal wiring layer cannot be arranged at the division position of the common electrode wiring layer, and there is a possibility that viewing angle color mixing occurs.
The subject of this indication is providing the display apparatus with few viewing angle color mixing.
Other problems and novel features will become apparent from the description of the present disclosure and the accompanying drawings.

The outline of a representative one of the present disclosure will be briefly described as follows.
That is, the display device divides the common electrode wiring layer in the source wiring layer direction, disposes the metal wiring layer above the source wiring layer and in contact with the common electrode wiring layer, and divides the common electrode wiring layer. The metal wiring layer is not disposed at the position. Although it is above the source wiring layer, the metal wiring layer may not be disposed between the colors of the same color as the divided positions of the common electrode wiring layer.

  According to the above display device, viewing angle color mixing can be reduced.

It is a figure which shows the structure of the liquid crystal display device which concerns on the comparative example 1. FIG. It is a figure which shows the structure of the liquid crystal display device which concerns on the comparative example 2. It is a figure which shows the color mixture of the liquid crystal display device which concerns on the comparative example 2. FIG. It is a figure for demonstrating the principle which viewing angle color mixture arises when an assembly shift | offset | difference arises. It is a figure for demonstrating the principle which viewing angle color mixture arises when an assembly shift | offset | difference arises. It is a figure for demonstrating the principle which viewing angle color mixture arises when an assembly shift | offset | difference arises. It is a figure for demonstrating the principle which viewing angle color mixture arises when an assembly shift | offset | difference arises. 1 is a diagram illustrating a configuration of a liquid crystal display device according to Example 1. FIG. 1 is a diagram illustrating a configuration of a TFT glass substrate according to Example 1. FIG. 1 is a diagram illustrating a configuration of a liquid crystal display device according to Example 1. FIG. FIG. 3 is a diagram illustrating color mixture of the liquid crystal display device according to the first embodiment. FIG. 6 is a diagram illustrating a configuration of a liquid crystal display device according to a third embodiment. FIG. 6 is a diagram illustrating color mixture of a liquid crystal display device according to Example 3. It is a figure which shows the structure of the liquid crystal display device which concerns on the modification 1. FIG. 10 is a diagram illustrating a configuration of a liquid crystal display device according to a fourth embodiment. FIG. 6 is a diagram illustrating color mixture of a liquid crystal display device according to Example 4;

First, the problem of viewing angle color mixing discovered by the present inventor will be described.
FIG. 1 is a diagram illustrating a configuration of a display device according to Comparative Example 1. FIG. 1A is a plan view showing a part of the liquid crystal display device, and FIG. 1B is a cross-sectional view showing a part of the liquid crystal display device along the line AA ′ in FIG. is there. The display device 11 according to the comparative example 1 includes a TFT glass substrate 12, a CF glass substrate 13, and a liquid crystal layer 21 sandwiched between the TFT glass substrate 12 and the CF glass substrate 13. In the TFT glass substrate 12, the common electrode wiring layer 14 is divided in a direction (X direction) parallel to the gate wiring layer, and the metal wiring layer 15 is connected to the common electrode wiring layer 14 between the sub-pixels. It is laid. Divided regions (divided positions) 20 between the common electrode wiring layer 14 and the common electrode wiring layer 14 extend in the X direction and are periodically arranged in the Y direction. The metal wiring layer 15 has a role of a light shielding layer for preventing color mixing of viewing angles and a resistance reduction of the common electrode wiring layer 14 when an assembly error occurs between the CF glass substrate 13 and the TFT glass substrate 12 in a high-definition panel. Also serves as. In the case of this configuration, since the division position of the common electrode wiring layer 14 is above a video line (gate wiring layer) (not shown), the signal line (source wiring layer) 16 excluding a part of the intersection with the gate wiring layer. All of the metal wiring layer 15 can be disposed on the upper portion of the substrate. That is, the metal wiring layer 15 is formed at a position below the BM 17 on all the signal wiring layers 16.

  The CF glass substrate 18 includes red (R), green (G), and blue (B) color filters (colored layers) 18 and a BM 17. The color filter 18 is repeatedly arranged in the order of R, G, and B in the row direction (X direction). The color filters 18 are arranged in the same color in the column direction. The color filter has a rectangular shape whose length in the X direction is shorter than the length in the Y direction in plan view.

  A detection electrode wiring layer (not shown) extends in the direction parallel to the source wiring layer 16 (Y direction) on the back surface (upper surface in FIG. 1B) of the CF glass substrate 18 and is periodically arranged in the X direction. ing.

  The common electrode wiring layer 14 and the pixel electrode wiring layer 19 are formed of a light-transmitting metal layer such as ITO, and the metal wiring layer 15 and the source wiring layer 16 are formed of a light shielding metal layer.

  FIG. 2A is a diagram illustrating a configuration of a display device according to Comparative Example 2. FIG. 2B is a diagram illustrating color mixing of the display device according to Comparative Example 2. 2A (a) is a plan view showing a part of the liquid crystal display device, and FIG. 2 (b) is a cross-sectional view showing a part of the liquid crystal display device along the line AA ′ in FIG. 2 (a). is there. In the display device 11A according to the comparative example, on the TFT glass substrate 12, the common electrode wiring layer 14 extends in a direction parallel to the source wiring layer 16 (Y direction), and is divided periodically in the X direction. A metal wiring layer 15 is disposed between the sub-pixels so as to be connected to the common electrode wiring layer 14. However, in order not to short-circuit the divided common electrode wiring layers 14, the metal wiring layer 15 is not disposed at the division position (divided region) of the common electrode wiring layer 14. That is, the metal wiring layer 15 is not formed at a position below the BM 17 on the source wiring layer 16 positioned at the division position of the common electrode wiring layer 14. As a result, viewing angle color mixing may occur when the CF glass substrate 13 and the TFT glass substrate 12 are misaligned (hereinafter simply referred to as “assembly misalignment”). The divided regions (divided positions) 20 between the common electrode wiring layer 14 and the common electrode wiring layer 14 extend in the Y direction and are periodically arranged in the X direction. The division position 20 of the common electrode wiring layer 14 is between the red subpixel and the green subpixel. The X direction of one divided common electrode wiring layer 14 is 9 sub-pixels (3 pixels). The interval between the divided common electrode wiring layers 14 (the width of the divided region) is smaller than the width of the metal wiring layer 15, and the width of the metal wiring layer 15 is smaller than the width of the BM 17. Since the common electrode wiring layer 14 is not divided in the Y direction, the common electrode wiring layer 14 is used in common for all pixels arranged in the Y direction.

  FIG. 3A to FIG. 3D are diagrams for explaining the principle that color mixing of viewing angles occurs when an assembly shift occurs. FIG. 3A is a cross-sectional view when no assembly deviation occurs when a white voltage is applied only to the red subpixel. FIG. 3B is a cross-sectional view when an assembly shift occurs when a white voltage is applied only to the red subpixel. FIG. 3A is a cross-sectional view when the CF glass substrate is shifted to the right. b) is a cross-sectional view when the CF glass substrate is shifted to the left. FIG. 3C is a cross-sectional view when an assembly shift occurs when a white voltage is applied only to the green subpixel, and FIG. 3A is a cross-sectional view when the CF glass substrate is shifted to the right. b) is a cross-sectional view when the CF glass substrate is shifted to the left. FIG. 3D is a cross-sectional view when an assembly shift occurs when a white voltage is applied only to the blue subpixel, and FIG. 3A is a cross-sectional view when the CF glass substrate is shifted to the right. b) is a cross-sectional view when the CF glass substrate is shifted to the left.

  In FIG. 3A, since the white voltage is applied only to the red sub-pixel and no assembly deviation occurs, the boundary between the white voltage and the black voltage is located at the center of the BM 17, so that no color mixing occurs.

  When a white voltage is applied only to the red sub-pixel in FIG. 3B (a) and the CF glass substrate 13 is shifted to the right, the white voltage is metal in any part located near the adjacent blue color filter. Since the wiring layer 15 is arranged, light leakage and color mixing do not occur. When a white voltage is applied only to the red sub-pixel of FIG. 3B (b) and the CF glass substrate 13 is shifted to the left, the metal wiring layer is located at a portion where the white voltage is located close to the adjacent green color filter. 15 is not disposed, and the light transmitted through the liquid crystal corresponding to the red subpixel of the TFT glass substrate 12 is transmitted through the red color filter and the green color filter, and green is mixed with red. However, color mixing does not occur where the metal wiring layer 15 is at the boundary between the red subpixel and the green subpixel.

  When a white voltage is applied only to the green sub-pixel in FIG. 3C (a) and the CF glass substrate 13 is shifted to the right, the metal wiring layer 15 is located at a portion where the white voltage is located close to the adjacent red color filter. Is not disposed, and light transmitted through the liquid crystal corresponding to the green subpixel of the TFT glass substrate 12 passes through the green color filter and the red color filter, and red is mixed with green. However, color mixing does not occur where the metal wiring layer 15 is at the boundary between the green sub-pixel and the red sub-pixel. When a white voltage is applied only to the green sub-pixel in FIG. 3C (b) and the CF glass substrate 13 is shifted to the left, any portion of the white voltage located near the adjacent blue color filter is metal. Since the wiring layer 15 is arranged, light leakage and color mixing do not occur.

  When a white voltage is applied only to the blue subpixel in FIG. 3D (a) and the CF glass substrate 13 is shifted to the right, the white voltage is metal in any part located near the adjacent green color filter. Since the wiring layer 15 is arranged, light leakage and color mixing do not occur. When a white voltage is applied only to the blue sub-pixel in FIG. 3D (b) and the CF glass substrate 13 is shifted to the left, the white voltage is metal in any part located near the adjacent red color filter. Since the wiring layer 15 is arranged, light leakage and color mixing do not occur.

  Note that when the division position of the common electrode wiring layer 14 is between the red sub-pixel and the green sub-pixel, the viewing angle color mixing as described above occurs. When the common electrode wiring layer 14 is divided between the green sub-pixel and the blue sub-pixel, a mixed color of blue with green or a mixed color of green with blue is generated. When the division position of the common electrode wiring layer 14 is between the blue sub-pixel and the red sub-pixel, a red mixed color of blue or a blue mixed color of red is generated. Note that if light leakage occurs in a subpixel having a high transmittance, color mixture deteriorates. Therefore, it is better to avoid dividing the common electrode wiring layer next to the subpixel having the highest transmittance. The transmittance is high in the order of white subpixel, green subpixel, red subpixel, and blue subpixel. That is, the white subpixel has the highest transmittance, and the blue subpixel has the lowest transmittance.

  FIG. 2B (a) shows a case where the CF glass substrate is shifted to the right, and FIG. 2B shows a case where the CF glass substrate is shifted to the left. FIGS. 7A and 7B show the liquid crystal display device when viewed from the right side, FIGS. 5A and 5B show the liquid crystal display device when viewed from the front, and FIGS. The case where the liquid crystal display device is viewed from the left side is shown. (A1) and (b1) show that when a white voltage is applied only to the red sub-pixel and an assembly shift occurs, (a2) and (b2) show that the white voltage is applied only to the green sub-pixel. In the case where an assembly error occurs, FIGS. 3A and 3B show the case where an assembly error occurs when a white voltage is applied only to the blue subpixel. Since the division position of the common electrode wiring layer 14, that is, the portion where the metal wiring layer 15 is not provided is periodically arranged, there is a possibility that red vertical stripes appear on the green screen as shown in FIG. There is a possibility that green vertical stripes appear on the red screen as shown in FIGS.

  Hereinafter, examples and modifications will be described with reference to the drawings. However, in the following description, the same components are denoted by the same reference numerals, and repeated description is omitted.

  FIG. 4 is a diagram illustrating the configuration of the liquid crystal display device according to the first embodiment. 4A is a plan view of each substrate of the liquid crystal display device, and FIG. 4B is a side view. The liquid crystal display device 40 according to the first embodiment has an in-cell type touch panel function, and the common electrode wiring layer also functions as a drive electrode wiring layer of the touch panel.

  The liquid crystal display device 40 includes a TFT glass substrate 12, a CF glass substrate 13, a liquid crystal layer 21, a backlight 41, a polarizing plate 42, a control circuit 43, a touch IC 45, and cables 49a, 49b, and 49c. The liquid crystal display device 40 is vertically long (the length in the Y direction is larger than the length in the X direction). On the TFT glass substrate 12, an LCD scanning circuit 46, a common electrode selection circuit (COM selection circuit) 47, and a signal line selection circuit 48 are formed of TFTs. The TFT glass substrate 12 is COG-mounted with a drive circuit 44 composed of a semiconductor integrated circuit (IC) such as a CMOS. The drive circuit 44 is connected to a control circuit 44 constituted by an IC through a cable 49a. A plurality of detection electrode wiring layers 50 extending in the X direction are formed on the upper surface (the side opposite to the liquid crystal layer 21) of the CF glass substrate 13, and the detection electrode wiring layers 50 are formed on the cable 49b via the cable 49b. It is connected to a mounted touch IC 45. The cable 49b is connected to the control circuit 43. The backlight 41 is connected to the control circuit 43 via a cable 49c. The polarizing plate 42 is disposed between the backlight 41 and the TFT glass substrate 12 and on the upper surface of the CF glass substrate 13.

  FIG. 5 is a diagram showing the configuration of the TFT glass substrate according to Example 1. 5A is a plan view showing a part of the TFT glass substrate, FIG. 5C is an enlarged plan view of a portion surrounded by a broken line in FIG. 5A, and FIG. The BB 'sectional view of (c) is shown.

  The common electrode wiring layer 14 extends in a direction parallel to the signal wiring layer 16 (Y direction), is divided in the X direction and is periodically arranged, and is connected to the common electrode wiring layer 14 between the sub-pixels. The metal wiring layer 15 is arranged in such a manner. However, in order not to short-circuit the divided common electrode wiring layers 14, the metal wiring layer 15 is not disposed at the division position (divided region) of the common electrode wiring layer 14. That is, the metal wiring layer 15 is not formed at a position below the BM 17 on the signal wiring layer 16 located at the division position of the common electrode wiring layer 14. The divided regions (divided positions) 20 between the common electrode wiring layer 14 and the common electrode wiring layer 14 extend in the Y direction and are periodically arranged in the X direction. Further, not all of the metal wiring layers 15 having the same color as the color at the division position of the common electrode wiring layer 14 are arranged. The common electrode layer 14 is connected between the subpixels except for the contact hole portion where the pixel electrode layer 19 is connected to the drain electrode layer 56. For convenience of drawing, the X direction of one divided common electrode wiring layer 14 is equivalent to 6 subpixels (2 pixels). In this embodiment, as in Comparative Example 2, FIG. As shown in FIG. 5, the X direction of one divided common electrode wiring layer 14 is 9 sub-pixels (3 pixels). The interval between the divided common electrode wiring layers 14 (the width of the divided region) is smaller than the width of the metal wiring layer 15, and the width of the metal wiring layer 15 is smaller than the width of the BM 17.

  A gate wiring layer 51 is formed on the glass substrate 58, and a semiconductor layer 53 is formed through a gate insulating film 52. Source wiring layer 16 and drain wiring layer 56 are connected to semiconductor layer 53 through contact holes in interlayer insulating film layer 54. The common electrode wiring layer 14 is disposed on the source wiring layer 16 via the insulating film layer 55. A metal wiring layer 15 is disposed on the common electrode wiring layer 14 in contact with a portion located above the source wiring layer 16. A pixel electrode layer 19 is disposed on the common electrode wiring layer 14 via an interlayer insulating film layer 57. The pixel electrode layer 19 is connected to the drain electrode layer 56 through a contact hole in the insulating film layer 55. The pixel electrode layer 19 has a slit. The gate wiring layer 51 extends in the X direction and extends in the Y direction toward the semiconductor layer 53. The common electrode wiring layer 14 and the pixel electrode layer 19 are formed of a light-transmitting metal layer such as ITO, and the metal wiring layer 15 and the source wiring layer 16 are formed of a light shielding metal layer.

  FIG. 6A is a diagram illustrating the configuration of the liquid crystal display device according to the first embodiment. FIG. 6B is a diagram illustrating color mixing of the liquid crystal display device according to the first embodiment. FIG. 6A is a plan view showing a part of the liquid crystal display device, and FIG. 6B is a cross-sectional view showing a part of the liquid crystal display device along the line AA ′ in FIG. is there. The display device 40 according to the first embodiment has the same configuration as the display device 11A according to the second comparative example. However, not all the metal wiring layers 15 between the sub-pixels of the same color as the sub-pixels at the division position of the common electrode wiring layer 14 are arranged. Further, in the display device 11A according to the comparative example 2, the common electrode 14 is divided between the red and green subpixels. However, in the display device 40 according to the first embodiment, the common electrode 14 is formed between the red and blue subpixels. It is divided. In the case of FIG. 6A, since the common electrode 14 is divided between the red and blue subpixels, the metal wiring layer 15 between all the red and blue subpixels is removed. However, FIG. 6B shows the color mixture when the common electrode 14 is divided between the red and green subpixels and the metal wiring layer 15 between all the red and green subpixels is removed.

  FIG. 6B (a) shows a case where the CF glass substrate is shifted to the right, and FIG. 6B shows a case where the CF glass substrate is shifted to the left. FIGS. 7A and 7B show the liquid crystal display device when viewed from the right side, FIGS. 5A and 5B show the liquid crystal display device when viewed from the front, and FIGS. The case where the liquid crystal display device is viewed from the left side is shown. (A1) and (b1) show that when a white voltage is applied only to the red sub-pixel and an assembly shift occurs, (a2) and (b2) show that the white voltage is applied only to the green sub-pixel. In the case where an assembly error occurs, FIGS. 3A and 3B show the case where an assembly error occurs when a white voltage is applied only to the blue subpixel. Since the division position of the common electrode wiring layer 14, that is, the portion where the metal wiring layer 15 is not provided is arranged with a cycle shorter than that of the comparative example 2, a little red is displayed on the green screen as shown in FIG. It is mixed uniformly, and green color is mixed a little uniformly on the red screen as shown in FIGS. In the display device 40 according to the first embodiment, since the metal wiring layer 15 between all the red and blue sub-pixels is removed, the red color is slightly mixed with the blue screen, and the blue color is slightly uniform with the red screen. Mixed with. However, since the horizontal metal wiring layer 15 of the green subpixel having the highest transmittance is not removed, color mixing can be prevented more than in the case of FIG. 6B.

  In the configuration of this embodiment, a viewing angle color mixing prevention effect cannot be obtained between red and blue subpixels, but a viewing angle color mixing prevention effect can be obtained between green and blue subpixels.

  The common electrode wiring layer 14 that also functions as a drive electrode wiring layer of the touch panel extends in the Y direction, is divided in the X direction and is periodically arranged, and the detection electrode wiring layer 50 extends in the X direction. A plurality are arranged in the Y direction. The width of the common electrode wiring layer 14 is wider than the width of the detection electrode wiring layer 50. The detection electrode wiring layer can be increased more easily than the common electrode wiring layer. Therefore, in a vertically long display device, touch detection accuracy can be easily improved by increasing the number of detection electrode wiring layers.

  The liquid crystal display device according to Example 2 has the same configuration as that of the liquid crystal display device 11A according to Comparative Example 2 in FIG. 2A, that is, the metal wiring layer is excluded only at the division positions, and the metal wiring layer 15 is provided between the other subpixels. It is the structure to arrange. However, if the definition of the subpixel is sufficient, even if viewing angle color mixing occurs only between the subpixels in the plane, the width of the region cannot be recognized sufficiently small for human eyes. Therefore, it is possible to obtain a color mixing prevention effect between the red subpixel and the green subpixel. If the common electrode 14 is divided between the red and blue subpixels, color mixing can be further prevented.

  FIG. 7A is a diagram illustrating the configuration of the liquid crystal display device according to the third embodiment. FIG. 7B is a diagram illustrating color mixing in the liquid crystal display device according to the third embodiment. FIG. 7A (a) is a plan view showing a part of the liquid crystal display device, and FIG. 7 (b) is a cross-sectional view showing a part of the liquid crystal display device along the line AA ′ in FIG. 7 (a). is there. The liquid crystal display device 40A according to the third embodiment shows a configuration in which the division position of the common electrode wiring layer 14 is zigzag.

  The division position of the common electrode wiring layer 14 in the direction of the source wiring layer 16 (Y direction) is such that the first row L1 is between the red subpixel and the green subpixel, and the second row L2 is between the green subpixel and the blue subpixel. The third row L3 is between the blue and red subpixels, the fourth row L4 is between the green and blue subpixels, and the fifth row L5 is between the red and green subpixels. The division position of the common electrode wiring layer 14 in the gate wiring layer direction (X direction) is between the green subpixel of the first row L1 and the green subpixel of the second row L2, and the blue subpixel of the second row L2 and the third row. Between the blue subpixel of the eye L3, between the blue subpixel of the third row L3 and the blue subpixel of the fourth row L4, between the green subpixel of the fourth row L4 and the green subpixel of the fifth row L5. is there. Microscopically, the divided areas 20 are arranged in a zigzag manner with a width of 2 subpixels in the X direction, and macroscopically extend in the Y direction.

  In FIG. 7A, the divided region in the gate wiring layer direction (X direction) of the common electrode wiring layer 14 is described above the green subpixel of the first row L1 and below the green subpixel of the fifth row L5. A divided region in the gate wiring layer direction (X direction) of the common electrode wiring layer 14 may be provided above the red subpixel of the first row L1 and below the red subpixel of the fifth row L5. In this case, the divided regions 20 are microscopically arranged in a zigzag manner with a width of 4 subpixels in the X direction, and macroscopically extend in the Y direction.

  FIG. 7B (a) shows a case where the CF glass substrate is shifted to the right, and FIG. 7B shows a case where the CF glass substrate is shifted to the left. FIGS. 7A and 7B show the liquid crystal display device when viewed from the right side, FIGS. 5A and 5B show the liquid crystal display device when viewed from the front, and FIGS. The case where the liquid crystal display device is viewed from the left side is shown. (A1) and (b1) show that when a white voltage is applied only to the red sub-pixel and an assembly shift occurs, (a2) and (b2) show that the white voltage is applied only to the green sub-pixel. In the case where an assembly error occurs, FIGS. 3A and 3B show the case where an assembly error occurs when a white voltage is applied only to the blue subpixel. When the definition of the configuration shown in Example 2 is not sufficient (Comparative Example 2), viewing angle color mixing may appear linear. In that case, as shown in this embodiment, when the dividing position is zigzag, blue vertical stripes appear on the red screen as shown in (a1) (ar) of the figure, and as shown in (a2) (ar) of the figure. The red vertical streaks appear on the green screen, and the green vertical streaks appear on the blue screen as shown in FIG. Further, as shown in FIGS. (B1) and (bl), green vertical stripes appear on the red screen, and as shown in FIGS. (B2) and (bl), blue vertical stripes appear on the green screen. ) As shown in (bl), red vertical stripes appear on the blue screen. However, the amount of light leakage when the viewing angle color mixture occurs can be reduced to 1/3 compared to the comparative example 2 by making the divided position zigzag as in the present embodiment. Therefore, the visibility of the viewing angle mixed color portion can be reduced as compared with Comparative Example 2.

<Modification>
FIG. 8 is a diagram showing a configuration of a liquid crystal display device according to a modification. FIG. 8A is a plan view showing a part of the liquid crystal display device, and FIG. 8B is a cross-sectional view showing a part of the liquid crystal display device along the line AA ′ of FIG. is there. The liquid crystal display device 40B according to the modification can be arranged with common electrodes divided in an oblique direction by repeating zigzag in one direction. Such a configuration may be adopted for the purpose of reducing the visibility of color mixing of viewing angles.

  The division position of the common electrode wiring layer 14 of the liquid crystal display device 40B is the same as the division position from the first row L1 to the third row L3 of the common electrode wiring layer 14 of the third embodiment. As for the division position in the Y direction of the common electrode wiring layer 14 of the liquid crystal display device 40B, the fourth row L4 is between the red subpixel and the green subpixel, and the fifth row L5 is between the green subpixel and the blue subpixel. The X-direction division position of the common electrode wiring layer 14 of the modification is between the red subpixel of the third row L3 and the red subpixel of the fourth row L4, the green subpixel of the fourth row L4, and the green of the fifth row L5. Between sub-pixels. The divided regions 20 are arranged in a zigzag microscopically and extend in the Y direction macroscopically.

  FIG. 9A is a diagram illustrating the configuration of the liquid crystal display device according to the fourth embodiment. FIG. 9B is a diagram illustrating the color mixture of the liquid crystal display device according to the fourth embodiment. 9A (a) is a plan view showing a part of the liquid crystal display device, and FIG. 9 (b) is a cross-sectional view showing a part of the liquid crystal display device along the line AA ′ in FIG. 9 (a). is there. In the display device 40C according to the fourth embodiment, half of the blue subpixel is changed to a white (W) subpixel in addition to the RGB three-color subpixel. That is, the display device 40C according to the fourth embodiment has a RGBW four-color subpixel structure, and the blue subpixel and the white subpixel share the same source wiring layer 16, and the common electrode layer wiring layer 14 is in the direction of the source wiring layer 16 The division position in the (Y direction) is zigzag so that it passes between the red subpixel and the blue subpixel. The division position of the shared electrode layer wiring layer 14 in the direction of the source wiring layer 16 is not between the white subpixel and the blue subpixel. The division position in the gate wiring layer direction (X direction) of the common electrode wiring layer 14 is between the white subpixel in the first row L1 and the blue subpixel in the second row L2, and the blue subpixel in the second row L2 and the third row. Between the white subpixel of the third row L3, between the white subpixel of the third row L3 and the blue subpixel of the fourth row L4, between the blue subpixel of the fourth row L4 and the white subpixel of the fifth row L5. is there. Microscopically, the divided regions 20 are arranged in a zigzag manner with a width of three subpixels in the X direction, and macroscopically extend in the Y direction. The X direction of one divided common electrode wiring layer 14 is 12 subpixels (4 pixels).

  FIG. 9B (a) shows a case where the CF glass substrate is displaced to the right, and FIG. 9B shows a case where the CF glass substrate is displaced to the left. FIGS. 7A and 7B show the liquid crystal display device when viewed from the right side, FIGS. 5A and 5B show the liquid crystal display device when viewed from the front, and FIGS. The case where the liquid crystal display device is viewed from the left side is shown. (A1) and (b1) show that when a white voltage is applied only to the red sub-pixel and an assembly shift occurs, (a2) and (b2) show that the white voltage is applied only to the green sub-pixel. In the case where an assembly error occurs, FIGS. 3A and 3B show the case where an assembly error occurs when a white voltage is applied only to the blue subpixel. Blue vertical stripes appear on the red screen as shown in (a1) and (ar) of the figure, and red vertical stripes appear on the blue screen as shown in (b3) and (bl) of the figure. However, the amount of light leakage when the viewing angle color mixture occurs can be halved compared to the comparative example 2 by zigzag the division position as in this embodiment. Therefore, the visibility of the viewing angle mixed color portion can be reduced as compared with Comparative Example 2.

  It is desirable that the shared electrode wiring layer 14 is divided between the red subpixel and the blue subpixel so that the transmitted light does not flow even if light leaks, and it is difficult to recognize the mixed color. However, in the case of a pixel configuration in which the blue subpixel and the white subpixel share the same source wiring layer 16 in the RGBW four-color subpixels, if the red subpixel and the blue subpixel are divided linearly, the transmittance High white subpixel width is included. If the shared electrode wiring layer 14 is divided beside the white subpixel having a higher transmittance than the green subpixel, the color mixing of the viewing angles becomes significant if light leaks. Therefore, by dividing the red subpixel and the blue subpixel in a zigzag manner so as to avoid the white subpixel, the viewing angle color mixture can be reduced. When the shared electrode wiring layer 14 is divided linearly as in the comparative example 2, in order to avoid the side of the white subpixel, the shared electrode is arranged between the red subpixel and the green subpixel as in the comparative example 2. The wiring layer 14 is preferably divided.

  As mentioned above, the invention made by the present inventor has been specifically described based on the embodiments, examples, and modifications. However, the present invention is not limited to the above-described embodiments, examples, and modifications. It goes without saying that various changes can be made.

11, 11A, 40, 40A, 40B, 40C ... Liquid crystal display device 12 ... TFT glass substrate 13 ... CF glass substrate 14 ... Common electrode wiring layer 15 ... Metal wiring layer 16 ... Signal wiring layer (source wiring layer)
17 ... Black matrix (BM)
18 ... Color filter (colored layer)
19 ... Pixel electrode layer 20 ... Division area (division position)
21 ... Liquid crystal layer

Claims (9)

A display device having a plurality of first pixels includes:
A first substrate;
A second substrate;
With
The first substrate is
A gate wiring extending in a first direction;
A plurality of source lines extending in a second direction different from the first direction and arranged in the first direction;
Common to the plurality of first pixels arranged in the second direction, a common electrode and a first common electrode and the second common electrodes arranged in the first direction through the divided areas,
A common electrode selection circuit independently connected to each of the first common electrode and the second common electrode;
A plurality of metal wirings extending in the second direction and arranged in the first direction,
Each of the plurality of first pixels includes a first color sub-pixel, a second color sub-pixel, and a third color sub-pixel that are sequentially arranged along the first direction. ,
The plurality of source lines include a first source line and a plurality of second source lines adjacent to both sides of the first source line,
The divided region of the common electrode is arranged between the first-color subpixel and the second-color subpixel, located in the portion located on the first source line,
The plurality of metal wirings are positioned on the plurality of second source wirings,
In the image display area in which the plurality of first pixels are formed, the plurality of metal wirings are not branched in the first direction.
The display device, wherein the metal wiring is in contact with the common electrode. The display device according to claim 1.
A display device in which the shape of the divided region in plan view is a rectangle extending in the second direction, and the width thereof is narrower than the width of the metal wiring. The display device according to claim 1 or 2,
The display device, wherein the metal wiring is not in a portion located on the first source wiring. The display device according to claim 1.
In the portion of the common electrode where the first pixel row arranged in the first direction is located, the divided region of the common electrode includes a first color sub-pixel and a second sub-pixel for each predetermined number of sub-pixels. Located between sub-pixels of the color of
In the portion of the common electrode where the second pixel row arranged in the first direction adjacent to the first pixel row is located, the divided region of the common electrode has a number of sub-pixels every predetermined number of subpixels. Located between the second color sub-pixel and the third color sub-pixel;
In the portion of the common electrode where the third pixel row arranged in the first direction adjacent to the second pixel row is located, the divided region of the common electrode has a number of sub-pixels for each predetermined number of subpixels. Located between the three color sub-pixels and the first color sub-pixel,
In the portion of the common electrode in which the fourth pixel row arranged in the first direction adjacent to the third pixel row is located, the divided region of the common electrode has a number of sub-pixels every predetermined number of subpixels. Located between the second color sub-pixel and the third color sub-pixel;
In the portion of the common electrode where the fifth pixel row arranged in the first direction adjacent to the fourth pixel row is located, the divided region of the common electrode is divided into a predetermined number of subpixels. Located between a sub-pixel of one color and a sub-pixel of a second color;
The planar view shape of the divided region is a straight line extending macroscopically in the second direction, and microscopically being a zigzag line extending in the first direction and the second direction. , Display device. The display device according to claim 1.
In the portion of the common electrode where the first pixel row arranged in the first direction is located, the divided region of the common electrode includes a first color sub-pixel and a second sub-pixel for each predetermined number of sub-pixels. Located between sub-pixels of the color of
In the portion of the common electrode where the second pixel row arranged in the first direction adjacent to the first pixel row is located, the divided region of the common electrode has a number of sub-pixels every predetermined number of subpixels. Located between the second color sub-pixel and the third color sub-pixel;
In the portion of the common electrode where the third pixel row arranged in the first direction adjacent to the second pixel row is located, the divided region of the common electrode has a number of sub-pixels for each predetermined number of subpixels. Located between the three color sub-pixels and the first color sub-pixel,
In the portion of the common electrode in which the fourth pixel row arranged in the first direction adjacent to the third pixel row is located, the divided region of the common electrode has a number of sub-pixels every predetermined number of subpixels. Located between a sub-pixel of one color and a sub-pixel of a second color;
In the portion of the common electrode where the fifth pixel row arranged in the first direction adjacent to the fourth pixel row is located, the divided region of the common electrode is divided into a predetermined number of subpixels. Located between the second color sub-pixel and the third color sub-pixel;
The planar view shape of the divided region is a straight line that extends macroscopically in an oblique direction, and is a zigzag line that extends microscopically in the first direction and the second direction. The display device according to any one of claims 1 to 5,
The common electrode is a transparent conductive film;
The display device, wherein the metal wiring is a light-shielding conductive film. The display device according to any one of claims 1 to 5,
The common electrode is a display device that is also used for touch detection of an in-cell touch panel. The display device according to any one of claims 1 to 5,
The second substrate is
First, second and third colored layers respectively corresponding to the first, second and third color sub-pixels;
And a black matrix disposed between each of the first, second and third colored layers. The display device according to any one of claims 1 to 5,
The display device, wherein the first, second, and third colors are blue, red, and green, respectively.

Images