JP5275825B2 - Liquid crystal display device and electronic device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a liquid crystal display apparatus the response velocity of which can be restrained from being decelerated while controlling a view angle thereof. <P>SOLUTION: The liquid crystal display apparatus 100 is provided with pixels 1 which are arranged in a matrix form and each of which has an almost rectangular shape in planar view and comprises sub-pixels 1a, 1b, 1c for display and a sub-pixel 1d for controlling the view angle. Each of the sub-pixel 1d for controlling the view angle and the sub-pixel 1a for display, which is adjacent to the sub-pixel 1d for controlling the view angle in the Y direction, is made to have the area larger than that of each of the sub-pixels 1b and 1c for display. The sub-pixel 1a for display is made to correspond to the color other than the color having the highest visibility. <P>COPYRIGHT: (C)2010,JPO&amp;INPIT

Description

The present invention relates to a liquid crystal display device and an electronic device, and more particularly to a liquid crystal display device and an electronic device including a display subpixel and a viewing angle control subpixel.

Conventionally, a liquid crystal display device is disclosed in which each pixel includes a display subpixel and a viewing angle control subpixel that controls the viewing angle (for example, Patent Document 1).

In the above-mentioned Patent Document 1, each pixel has a display subpixel corresponding to display of red (R) green (G) and blue (B) and a viewing angle control subpixel for controlling the viewing angle ( W) is disclosed. In the liquid crystal display device described in Patent Document 1, each pixel has two display subpixels corresponding to green (G) and blue (B), respectively, adjacent to the viewing angle control subpixel (W). They are arranged in a matrix of two rows and columns, and each subpixel is configured to be surrounded by signal lines and gate lines arranged in a grid pattern. Then, the contrast of the image is lowered by overlapping the light emitted from the viewing angle control subpixel with the colored light (image) emitted from the display subpixel. Thus, when the user views the display screen from an oblique direction, the image is not recognized because the contrast of the display image is reduced. That is, the viewing angle is controlled to be narrow.

JP 2007-79525 A

In the liquid crystal display device disclosed in Patent Document 1, it is considered that, for example, by increasing the area of the viewing angle control sub-pixel, it is possible to further improve the accuracy of viewing angle control. However, in this case, since only the area of the viewing angle control subpixel is increased, the gate lines and signal lines formed so as to extend along the edge portions of the subpixels are formed in a straight line when viewed in plan. In other words, the shape is bent along the shape of the sub-pixel for viewing angle control whose area is increased. For this reason, the resistance of the portion where the gate line and the signal line are bent is increased, and there is a problem that the response speed is lowered accordingly.

The present invention has been made to solve the above-described problems, and one object of the present invention is to provide a liquid crystal display device capable of suppressing a decrease in response speed while controlling a viewing angle. And to provide electronic equipment.

Means for Solving the Problems and Effects of the Invention

The liquid crystal display device according to a first aspect of the invention, each is a four sub-pixel having a rectangular shape in plan view, red, and the sub-pixel display corresponding respectively to green and blue display The viewing angle control subpixels for controlling the viewing angle are arranged in a matrix of 2 rows and 2 columns, and the four subpixels have the same length when they are adjacent to each other when seen in a plan view. Each pixel is formed such that each boundary extends linearly , and the outer peripheral shape is a rectangular shape, is connected to a pixel transistor provided in each of the four sub-pixels, and a gate of the pixel transistor A plurality of gate lines provided so as to extend in a straight line along the row direction of the sub-pixels between the pixels and between the sub-pixels when viewed in a plane, See the boundaries between pixels and sub-pixels More provided so as to extend linearly along the column direction of the pixel, and a signal line for supplying a video signal to the sub-pixels for display through the pixel transistor, among the four sub-pixels, the viewing field angle control The sub-pixel for display and the display sub-pixel arranged in at least one of the row and column in which the viewing angle control sub-pixel is arranged are arranged in other than the row and column in which the viewing angle control sub-pixel is arranged. The display subpixel is configured to have a larger area, and one of the red display subpixel and the blue display subpixel is adjacent in the row direction of the viewing angle control subpixel, and the other is the viewing angle. The control subpixels are arranged adjacent to each other in the column direction .

In the liquid crystal display device according to the first aspect, as described above, the area of the viewing angle control subpixel is larger than that of the display subpixels arranged in a row or column other than the row and column in which the viewing angle control subpixels are arranged. By doing so, the accuracy of controlling the viewing angle can be improved accordingly. In addition to the area of the viewing angle control subpixel, the area of the display subpixel arranged in at least one of the row and the column in which the viewing angle control subpixel is arranged is arranged in the viewing angle control subpixel. When the area of only the viewing angle control subpixels is increased by configuring the display subpixels to be larger than the display subpixels arranged outside the rows and columns, the outer peripheral shape of the pixels has a protruding shape in plan view. Unlike the shape including the pixel, the outer peripheral shape of the pixel can be configured in a rectangular shape. Thus, when the gate line and the signal line are provided so as to extend along the outer periphery of the pixel, the gate line and the signal line can be formed in a straight line without being bent along the protruding shape. . Therefore, since the resistance of the gate line and the signal line can be reduced as compared with the case where the gate line and the signal line are formed in a protruding shape, it is possible to suppress the response speed from being lowered accordingly. In addition, the display subpixel having a larger area together with the viewing angle control subpixel is configured to correspond to red or blue , so that the display subpixel having a larger area has lower visibility than green. Therefore, even if the area is increased, it is possible to suppress a decrease in view angle controllability. Further, since the red or blue color is displayed by the display subpixel having a large area, it is possible to suppress the overall color balance from being lost as compared with the case where green is associated with the display subpixel having the large area. .

In the liquid crystal display device according to the first aspect, preferably, when viewed in plan, the viewing angle control subpixel and the red or blue display subpixel adjacent to the viewing angle control subpixel in the column direction are: Since the length along the row direction is longer than that of the green display subpixel, the area is larger than that of the green display subpixel. With this configuration, when the length of the viewing angle control sub-pixel along the row direction is increased, the row of the display sub-pixel adjacent in the column direction for viewing angle control together with the viewing angle control sub-pixel. Since the length along the direction is also increased, the area of the viewing angle control sub-pixel can be increased in a state where the outer peripheral shape of the pixel is kept in a rectangular shape.

In the liquid crystal display device according to the first aspect, preferably, the viewing angle control subpixel and the red or blue display subpixel adjacent to the viewing angle control subpixel in the row direction are planarly viewed. Since the length along the column direction is longer than that of the green display subpixel, the area is larger than that of the green display subpixel. With this configuration, when the length of the viewing angle control subpixels along the column direction is increased, the columns of the display subpixels adjacent to each other in the row direction for viewing angle control together with the viewing angle control subpixels. Since the length along the direction is also increased, the area of the viewing angle control sub-pixel can be increased in a state where the outer peripheral shape of the pixel is kept in a rectangular shape.

In the liquid crystal display device according to the first aspect, preferably, in plan view, the sub-pixel and sub-pixel for blue display for display of red, respectively, row and column to the sub-pixel for viewing angle control One of the red and blue display subpixels that are adjacent to each other in the direction and adjacent to the viewing angle control subpixel in the column direction has a length along the row direction as compared to the green display subpixel. The other red or blue display subpixel adjacent to the viewing angle control subpixel in the row direction is longer in the column direction than the green display subpixel. area of both sub-pixels for red and blue display is configured to be larger than the area of the sub-pixel for green display. According to this configuration, when the length along the row direction and the column direction of the viewing angle control subpixel is increased, the row direction of the red and blue display subpixels adjacent to the viewing angle control subpixel is increased. Since the length along the vertical direction and the length along the column direction are also increased, the area of the viewing angle control sub-pixel can be increased in a state where the outer peripheral shape of the pixel is kept in a rectangular shape. Further, in this case, by reducing the area of both the red and blue display subpixels compared to the area of the green display subpixel, the deterioration of the controllability of the viewing angle is suppressed, and the overall color It is possible to reliably prevent the balance from being lost.

In the liquid crystal display device according to the first aspect, a first substrate and a second substrate, which are preferably provided so as to face each other, and on which the display subpixel and the viewing angle control subpixel are formed, and the first substrate The common electrode formed on the common electrode is disposed so as to face the common electrode with an insulating film interposed therebetween, and is provided in each of the display subpixel and the viewing angle control subpixel.
A pixel electrode including a plurality of slits, and a slit of a pixel electrode corresponding to a display sub-pixel and a slit of a pixel electrode corresponding to a viewing angle control sub-pixel Are configured differently. According to this configuration, the response speed of the response speed can be adjusted while adjusting the viewing angle by the display sub-pixel and the viewing angle control sub-pixel by the lateral electric field type driving method including the common electrode and the pixel electrode through the insulating film. A liquid crystal display device capable of suppressing the decrease can be configured.

In the liquid crystal display device according to the first aspect, a first substrate and a second substrate, which are preferably provided so as to face each other, and on which the display subpixel and the viewing angle control subpixel are formed, and the first substrate A first common electrode formed in a region where an upper display subpixel is formed, a first pixel electrode disposed on the first common electrode so as to face each other through an insulating film, and including a plurality of slits; The second pixel electrode formed in the region where the viewing angle control subpixel is formed on the first substrate, and the second pixel electrode facing the region where the viewing angle control subpixel is formed on the second substrate. And a second common electrode arranged to do so. With this configuration, for viewing angle control by a vertical electric field type driving method including a display sub-pixel by a horizontal electric field type driving method, a pixel electrode on the first substrate, and a common electrode on the second substrate. By combining with sub-pixels, a liquid crystal display device that can suppress a decrease in response speed while controlling the viewing angle can be configured.

An electronic apparatus according to a second aspect of the present invention includes a liquid crystal display device having the above-described configuration. If comprised in this way, the electronic device containing the liquid crystal display device which can suppress that a responsiveness falls will be obtained, controlling a viewing angle.

1 is a plan view of a display unit of a liquid crystal display device according to a first embodiment of the present invention. It is an enlarged plan view for demonstrating the structure of the pixel of the liquid crystal display device by 1st Embodiment of this invention. 1 is a plan view of a liquid crystal display device according to a first embodiment of the present invention. It is sectional drawing along the 60-60 line shown in FIG. It is an enlarged plan view for demonstrating the structure of the pixel of the liquid crystal display device by 2nd Embodiment of this invention. It is a top view of the liquid crystal display device by 2nd Embodiment of this invention. It is sectional drawing along the 260-260 line | wire shown in FIG. It is an enlarged plan view for demonstrating the structure of the pixel of the liquid crystal display device by 3rd Embodiment of this invention. It is a top view of the liquid crystal display device by 3rd Embodiment of this invention. It is sectional drawing of the liquid crystal display device by 4th Embodiment of this invention. It is sectional drawing of the liquid crystal display device by 5th Embodiment of this invention. In 6th Embodiment of this invention, it is a top view for demonstrating the electronic device provided with the liquid crystal display device by 1st-5th embodiment. In 6th Embodiment of this invention, it is a top view for demonstrating the electronic device provided with the liquid crystal display device by 1st-5th embodiment.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

(First embodiment)
With reference to FIGS. 1-4, the structure of the liquid crystal display device 100 by 1st Embodiment of this invention is demonstrated.

The display unit 100a of the liquid crystal display device 100 according to the first embodiment of the present invention is provided with a plurality of pixels 1 in a matrix as shown in FIG.

As shown in FIG. 2, each pixel 1 is displayed by display sub-pixels 1a, 1b, and 1c that correspond to the display of red (R), green (G), and blue (B), respectively, and the display unit 100a. Viewing angle control subpixel 1 that emits transparent or white light for controlling the range of the viewing angle of the image
It is composed of four rectangular sub-pixels consisting of d (W). The rectangular display sub-pixels 1a, 1b and 1c and the viewing angle control sub-pixel 1d constituting the pixel 1 are arranged in a matrix of 2 rows and 2 columns, and the outer peripheral shape of the pixel 1 is rectangular. It is configured as follows.

Here, in the first embodiment, the lengths L in the Y direction (column direction) of the display subpixels 1a, 1b, and 1c and the viewing angle control subpixel 1d are the same in plan view. It is comprised so that it may become length. On the other hand, in the X direction (row direction) of the viewing angle control subpixel 1d and the display subpixel 1a (R) adjacent to the side along the X direction (row direction) of the viewing angle control subpixel 1d. The width W1 is configured to be longer than the width W2 in the X direction (row direction) of the other display subpixels 1b and 1c. The width W 1 is constructed such that at about 2 times the width W 2 long maximum. As a result, the subpixels are arranged so that the sides adjacent to each other have the same length, and the boundary lines (line 50-50 in FIG. 2) between the subpixels extend in a straight line. . Further, the outer peripheral shape of the pixel 1 is also rectangular when viewed in plan. The area of the display subpixel 1a and the viewing angle control subpixel 1d is increased by the increase in the width in the X direction (row direction) between the display subpixel 1a and the viewing angle control subpixel 1d. It is configured to be larger than the areas of the pixels 1b and 1c.

In the first embodiment, the display subpixel 1a whose display area is larger than the display subpixels 1b and 1c together with the viewing angle control subpixel 1d (display arranged in the same column as the viewing angle control subpixel 1d). Sub-pixel) is configured to correspond to a color other than the color having the highest visibility.
Specifically, in the first embodiment, the three display subpixels are red (R) and green (G
) And blue (B), and the display subpixel 1a whose area is larger than that of the display subpixels 1b and 1c is a color other than green (G) having the highest visibility (red in the first embodiment). Are configured to correspond to each other.

Also, as shown in FIG. 3, a plurality of gate lines 2 are formed so as to extend in a straight line along the X direction (row direction) for each row of subpixels as viewed in a plan view. In addition, for each column of subpixels,
A plurality of signal lines 3 are formed so as to extend in a straight line along the Y direction (column direction).

Next, a detailed configuration of the pixel 1 will be described. As shown in FIGS. 3 and 4 (a cross-sectional view taken along line 60-60 in FIG. 3), the gate electrode 11 and the common electrode 12 are formed on the first substrate 10, and the gate electrode 11 and the common electrode are formed. An insulating film 13 made of SiN or the like is formed on the surface of 12. The gate electrode 11 of each subpixel is electrically connected to the corresponding gate line 2. The insulating film 13 has a function as a gate insulating film of the pixel transistor 17 described later. A semiconductor layer 14 made of amorphous silicon (a-Si) is formed on the gate electrode 11 via an insulating film 13. The semiconductor layer 14 is configured to have a two-layer structure of a lower a-Si layer and an upper n ⁺ Si layer having n-type conductivity. The n ⁺ Si layer above the semiconductor layer 14 is formed in order to increase carrier transfer efficiency.

On the surface of the semiconductor layer 14, the source electrode 15 is overlapped with the semiconductor layer 14 in plan view.
And the drain electrode 16 is formed. The source electrode 15 of each subpixel is electrically connected to the corresponding signal line 3. Further, in the region sandwiched between the source electrode 15 and the drain electrode 16 of the semiconductor layer 14, the upper n ⁺ Si layer is removed and a channel region is formed by the lower a-Si layer. As described above, the pixel transistor 17 is configured by the gate electrode 11, the insulating film 13 (gate insulating film), and the semiconductor layer 14. A passivation film 18 made of, for example, SiN is formed on the surfaces of the source electrode 15 and the drain electrode 16. On the surface of the passivation film 18, a pixel electrode 19a (19c) having a slit 19b (19d) is formed. An alignment film (not shown) is formed so as to cover the passivation film 18 and the pixel electrode 19a (19c).

In addition, a light shielding film (black matrix) 21 is formed on the second substrate 20 at a position corresponding to the region where the pixel transistor 17 is provided on the first substrate 10, and each display subpixel 1a. Color filters 22 of corresponding colors (blue (B) in FIG. 4) are formed in regions corresponding to 1b and 1c. The color filter 22 is not formed in a region corresponding to the viewing angle control subpixel 1d, and a light source (on the first substrate 10 side) is driven when the viewing angle control subpixel 1d is driven. (Not shown) is configured to transmit light. An overcoat layer 23 is formed on the surfaces of the light shielding film 21 and the color filter 22, and an alignment film (not shown) is provided on the surface of the overcoat layer 23. A liquid crystal 30 is filled between the first substrate 10 and the second substrate 20.

Here, in the first embodiment, the four sub-pixels (1a, 1b, 1c, and 1d) have electric fields generated between the common electrode 12 and the pixel electrode 19a (19c) formed on the first substrate 10 side, respectively. The lateral electric field type driving method (F) in which the liquid crystal is driven by the lateral component (X and Y directions) of
FS (Fringe Field Switching) mode).

Specifically, as shown in FIG. 3, the slit 19b formed in the pixel electrode 19a corresponding to the display subpixels 1a, 1b and 1c has a V-shape extending in the Y direction when seen in a plan view. On the other hand, the slit 19 formed in the pixel electrode 19c corresponding to the viewing angle control subpixel 1d.
d is formed to extend in a straight line in the X direction. As a result, the display sub-pixel 1a
Fields corresponding to display subpixels 1a, 1b, and 1c are generated in areas corresponding to 1b and 1c and areas corresponding to viewing angle control subpixels 1d, respectively. And liquid crystal molecules (liquid crystal 30) in the region corresponding to the viewing angle control subpixel 1d,
It is configured to drive in different directions (lateral directions).

With the above configuration, when the viewing angle control subpixel 1d is not operated, the viewing angle is not controlled, and the display image displayed on the display unit 100a can be recognized not only from the front but also from an oblique direction. On the other hand, when the viewing angle control subpixel 1d is operated, the light emitted from the viewing angle control subpixel 1d is light in the oblique direction (image) emitted from each of the display subpixels 1a, 1b, and 1c. And the contrast of the image in the oblique direction decreases. Then, the display image displayed on the display unit 100a becomes unrecognizable (viewing angle is controlled) when the display unit 100a is viewed obliquely by the amount of the reduced contrast.

In the first embodiment, as described above, by increasing the area of the viewing angle control subpixel 1d as compared with the display subpixels 1b and 1c, the accuracy of controlling the viewing angle is improved accordingly. Can do. Further, by configuring the display subpixel 1a to be larger than the display subpixels 1b and 1c together with the area of the viewing angle control subpixel 1d, the area of only the viewing angle control subpixel 1d is reduced. When the size is increased, the outer peripheral shape of the pixel 1 is a shape including a protruding shape when viewed in plan, and the outer peripheral shape of the pixel 1 can be configured to be rectangular.
Thereby, when the gate line 2 and the signal line 3 are provided so as to extend along the outer periphery of the pixel 1, the gate line 2 and the signal line 3 are formed in a straight line without being bent along the protruding shape. Can be formed. Therefore, the resistance of the gate line 2 and the signal line 3 can be reduced as compared with the case where the gate line 2 and the signal line 3 are formed in a protruding shape.
It can suppress that response speed falls. In addition, the display subpixel 1a that increases the area together with the viewing angle control subpixel 1d is configured to correspond to red, which is a color other than green, which has the highest visibility, thereby increasing the display subpixel 1a. Since the visibility is lower than when the pixel 1a is associated with green, which has the highest visibility, even if the area is increased, it is possible to suppress a decrease in view angle controllability. Further, since the red color having the lowest visibility is displayed by the display subpixel 1a having a large area, the display subpixel 1 having a large area is displayed.
Compared with the case where green having the highest visibility is associated with a, it is possible to prevent the overall color balance from being lost.

In the first embodiment, each pixel 1 having a rectangular outer peripheral shape is made red,
It is composed of four rectangular sub-pixels each composed of display sub-pixels 1a, 1b and 1c corresponding to green and blue displays and a viewing angle control sub-pixel 1d, and the four sub-pixels are arranged in two rows and two columns. The display subpixels 3 of three colors corresponding to red, green, and blue are arranged by associating red, which is a color other than green, with the display subpixel 1a having a large area.
In the liquid crystal display device 100 configured by a, 1b and 1c and the viewing angle control sub-pixel 1d, it is possible to suppress a decrease in response speed while reliably adjusting the viewing angle.

In the first embodiment, when the four subpixels including the viewing angle control subpixel 1d and the display subpixel 1a having a large area are viewed in plan, the sides adjacent to each other have the same length. Even when the area of the viewing angle control subpixel 1d and the display subpixel 1a is increased by configuring the boundary between the subpixels so as to extend in a straight line, When the gate line 2 and the signal line 3 are provided on the boundary line (50-50 line), the gate line 2 and the signal line 3 can be easily formed in a straight line. 3 can be made smaller.

In the first embodiment, the gate line 2 and the signal line 3 are provided so as to extend in a straight line along the boundary between the sub-pixels, respectively, so that the viewing angle control sub-pixel 1d and the display sub-pixel are provided. Even when the area with 1a is increased, between pixels 1 and sub-pixels (1a, 1b, 1c
And 1d), the gate line 2 and the signal line 3 can be easily formed in a straight line. Therefore, the resistance of the gate line 2 and the signal line 3 can be easily reduced.

In the first embodiment, the viewing angle control sub-pixel 1d and the display sub-pixel 1a adjacent to the viewing angle control 1d in the Y direction are replaced with the green display sub-pixel 1b in plan view. Compared to the display sub-pixel 1a together with the viewing angle control sub-pixel 1d, the display sub-pixel 1a is arranged in the X-direction by making the area larger than the display sub-pixel 1b by increasing the length along the X direction. Since the length along the length is also increased, the area of the viewing angle control sub-pixel 1d can be increased in a state where the outer peripheral shape of the pixel 1 is maintained in a rectangular shape.

In the first embodiment, the extending direction of the slit 19b of the pixel electrode 19a corresponding to the display subpixels 1a, 1b and 1c and the slit 19d of the pixel electrode 19c corresponding to the viewing angle control subpixel 1d extends. Configure to be different from each other. Thus, the display subpixel 1
In the configuration in which a, 1b, and 1c and the viewing angle control sub-pixel 1d are of the lateral electric field type driving method, it is possible to suppress a decrease in response speed while adjusting the viewing angle.

(Second Embodiment)
In the second embodiment, referring to FIGS. 5 to 7, the first embodiment showing an example in which the length (width W <b> 1) along the X direction of the display sub-pixel 1 a and the viewing angle control pixel 1 d is increased. Unlike the embodiment, an example in which the lengths along the Y direction of the display sub-pixel 201c and the viewing-angle control pixel 201d are increased will be described.

As shown in FIGS. 5 and 6, the liquid crystal display device 200 according to the second embodiment has a width W in the X direction (row direction) between the display subpixels 201a, 201b, and 201c and the viewing angle control subpixel 201d. Are configured to have substantially the same length. On the other hand, in the Y direction (column direction) of the viewing angle control subpixel 201d and the display subpixel 201c (B) adjacent to the side along the Y direction (column direction) of the viewing angle control subpixel 201d. The length L1 is configured to be longer than the length L2 in the Y direction (column direction) of the display subpixels 201a and 201b. As a result, the subpixels are arranged so that the sides adjacent to each other have the same length, and the boundary line between the subpixels (line 250-250 in FIG. 5) extends in a straight line. . Then, the display sub-pixel 201c and the viewing angle control sub-pixel 201d
The area of the display sub-pixel 201c and the viewing angle control sub-pixel 201d is configured to be larger than the areas of the display sub-pixels 201a and 201b as the length in the Y direction (column direction) increases. .

Further, as shown in FIGS. 6 and 7 (sectional views taken along the line 260-260 in FIG. 6), in the display subpixels 201a, 201b, and 201c, the common electrode 21 is formed on the first substrate 10.
2a is formed, and the slit 21 is formed on the common electrode 212a via the insulating film 13.
A pixel electrode 219a having 9b is formed. Pixel electrode 219a and common electrode 21
2a are examples of the “first pixel electrode” and the “first common electrode” in the present invention, respectively. On the other hand, in the viewing angle control subpixel 201d, the pixel electrode 219c is formed on the first substrate 10, and the common electrode 21 is disposed on the second substrate 20 so as to face the pixel electrode 219c.
2b is formed. The pixel electrode 219c and the common electrode 212b are examples of the “second pixel electrode” and the “second common electrode” in the present invention, respectively.

Here, in the second embodiment, the display sub-pixels 201a, 201b, and 201c have the configuration of the lateral electric field type driving method (FFS mode), while the viewing angle control sub-pixel 201d
The liquid crystal is driven by a vertical electric field type driving method in which a liquid crystal is driven by a vertical electric field generated by the pixel electrode 219c on the first substrate 10 and the common electrode 212b on the second substrate 20. As an example of a vertical electric field type driving method, a driving method using linearly polarized light such as an ECB mode or a VA mode with 0 degree orientation is applicable.

  In addition, the other structure of 2nd Embodiment is the same as that of 1st Embodiment.

In the second embodiment, as described above, the display subpixel 201c and the viewing angle control pixel 20 are used.
Even when the length along the Y direction of 1d is increased, the response speed of the response speed can be controlled while controlling the viewing angle by associating the display sub-pixel 201c having a large area with blue other than green having the highest visibility. The decrease can be suppressed.

In the second embodiment, the viewing angle control sub-pixel 201d and the display sub-pixel 201c adjacent to the side along the Y direction of the viewing angle control sub-pixel 201d are green when viewed in a plan view. By making the length along the Y direction longer than that of the display subpixel 201b, the area is larger than that of the green display subpixel 201b, so that the Y of the viewing angle control subpixel 201d is increased. When the length along the direction is increased, the length along the Y direction of the display subpixel 201c is also increased. Therefore, the viewing angle control subpixel 20 is maintained in a state where the outer peripheral shape of the pixel 1 is kept rectangular.
The area of 1d can be increased.

Further, in the second embodiment, the display sub-pixels 201a and 20 by the lateral electric field type driving method are used.
Even in the combination of 1b and 201c and the viewing angle control sub-pixel 201d using the vertical electric field type driving method, the liquid crystal display device 200 is configured that can suppress a decrease in response speed while controlling the viewing angle. be able to.

  The remaining effects of the second embodiment are similar to those of the first embodiment.

(Third embodiment)
In the third embodiment, with reference to FIGS. 8 and 9, the viewing angle control subpixel 301d and the display subpixels 301a and 301c adjacent to the viewing angle control subpixel 301d are arranged in the X and Y directions. An example of increasing the length along each will be described.

As shown in FIGS. 8 and 9, the liquid crystal display device 300 according to the third embodiment includes a viewing angle control subpixel 301d and a display subpixel adjacent to the side along the X direction of the viewing angle control subpixel 301d. The width W3 in the X direction with the pixel 301a (R) is configured to be longer than the width W4 in the X direction of the display subpixels 301b and 301c. The viewing angle control subpixel 301
d and the display subpixel 301c adjacent to the side of the viewing angle control subpixel 301d along the Y direction.
The length L3 in the Y direction in (B) is Y in the display sub-pixels 301a and 301b.
It is configured to be longer than the length L4 in the direction. Each of the subpixels has substantially the same length in adjacent sides, and a boundary line between the subpixels (350-35 in FIG. 8).
0 line) is arranged so as to extend in a straight line. Thus, the display sub-pixel 30
The areas of 1a and 301c and the viewing angle control subpixel 301d are configured to be larger than the area of the display subpixel 301b. That is, the display subpixel 301b is configured to have the smallest area.

  Other configurations of the third embodiment are the same as those of the first embodiment.

In the third embodiment, as described above, the display subpixel 301a and the viewing angle control pixel 30 are used.
Even when the length (W3) along the X direction of 1d is increased and the length (L3) along the Y direction of the display sub-pixel 301c and the viewing angle control pixel 301d is increased, the area is the largest. By making green correspond to the small display sub-pixel 301b, it is possible to suppress a decrease in response speed while reliably controlling the viewing angle.

In the third embodiment, when the lengths of the viewing angle control subpixels along the X direction and the Y direction are increased, the display subpixels 301a and 30 are displayed together with the viewing angle control subpixel 301d.
Since the length along the X direction and the Y direction of 1c is also increased, the area of the viewing angle control sub-pixel 301d can be increased while the outer peripheral shape of the pixel 1 is kept rectangular. Further, in this case, by reducing the area of both the red and blue display sub-pixels 301a and 301c as compared with the area of the green display sub-pixel 301b, the deterioration of the controllability of the viewing angle is suppressed, and the whole It is possible to surely prevent the color balance from being lost.

  The remaining effects of the third embodiment are similar to those of the first embodiment.

(Fourth embodiment)
In the fourth embodiment, an example in which an interlayer insulating film 401 is provided above the pixel transistor 17 in the configuration of the first embodiment will be described with reference to FIG.

As shown in FIG. 10, the liquid crystal display device 400 according to the fourth embodiment includes subpixels (FIG. 10).
Then, in each of the display subpixel 401c and the viewing angle control subpixel 401d), an interlayer insulating film 401 is formed on the surface of the passivation film 18 covering the pixel transistor 17. A common electrode 412 is formed on the surface of the interlayer insulating film 401, and an insulating film 402 is formed on the surface of the common electrode 412 so as to cover the common electrode 412.
A pixel electrode 4 having a slit 419b (419d) is formed on the surface of the insulating film 402.
19a (419c) is formed.

A contact hole 403 reaching the drain electrode 16 of the pixel transistor 17 is formed in the passivation film 18, the interlayer insulating film 401, and the insulating film 402, and the pixel electrode 419 a (419 c) and the drain electrode 16 of the pixel transistor 17 are formed. Are electrically connected through a contact hole 403. The common electrode 412 is provided with an opening 412a for suppressing contact between the pixel electrode 419a (419c) over the contact hole 403 and the common electrode 412.

  In addition, the other structure of 4th Embodiment is the same as that of 1st Embodiment.

In the fourth embodiment, as described above, the passivation film 1 covering the pixel transistor 17 is used.
8 is formed on the surface of the pixel electrode 41, and the pixel electrode 41 is formed on the interlayer insulating film 401.
9a (419c) and the common electrode 412 are formed. By configuring in this way,
The gap length of the liquid crystal 30 (the first substrate 10 and the second substrate 2 is equivalent to the amount of the interlayer insulating film 401 formed.
(Gap length between 0) can be reduced.

  The remaining effects of the fourth embodiment are similar to those of the first embodiment.

(Fifth embodiment)
In the fifth embodiment, an example in which an interlayer insulating film 501 is provided above the pixel transistor 17 in the configuration of the second embodiment will be described with reference to FIG.

In the liquid crystal display device 500 according to the fifth embodiment, as shown in FIG. 11, an interlayer insulating film 501 is formed on the surface of the passivation film 18 that covers the pixel transistor 17. In the display subpixel 501c, a common electrode 512a is formed on the surface of the interlayer insulating film 501, and an insulating film 502 is formed on the surface of the common electrode 512a. A pixel electrode 519 a having a slit 519 b is formed on the surface of the insulating film 502. In the viewing angle control subpixel 501d, the insulating film 502 is formed on the surface of the interlayer insulating film 501.
And the pixel electrode 519c is formed on the surface of the insulating film 502.

A contact hole 503 is formed so as to penetrate the passivation film 18, the interlayer insulating film 501, and the insulating film 502 in each region of the display subpixel 501 c and the viewing angle control subpixel 501 d, and the pixel electrode 519a (519c) and the drain electrode 16 of the pixel transistor 17 are electrically connected through a contact hole 503. In addition, an opening 512c is formed in the common electrode 512a of the display subpixel 501c for suppressing contact between the pixel electrode 519a over the contact hole 503 and the common electrode 512a. A common electrode 512b is formed on the second substrate 20 side of the viewing angle control subpixel 501d so as to face the pixel electrode 519c.

  The remaining configuration of the fifth embodiment is similar to that of the second embodiment.

In the fifth embodiment, as described above, the interlayer insulating film 501 is formed on the surface of the passivation film 18 that covers the pixel transistor 17 even in the configuration based on the combination of the horizontal electric field type and vertical electric field type driving methods. The liquid crystal 30 corresponding to the amount of the interlayer insulating film 501 formed
The gap length (gap length between the first substrate 10 and the second substrate 20) can be reduced.

  The remaining effects of the fifth embodiment are similar to those of the second embodiment.

(Sixth embodiment)
In the sixth embodiment, with reference to FIGS. 12 and 13, an electronic apparatus using the liquid crystal display device 100 (200, 300, 400, 500) shown in any of the first to fifth embodiments of the present invention. Will be described.

Liquid crystal display devices 100 (200, 300, 400, 5) according to first to fifth embodiments of the present invention.
00) can be used for a mobile phone 600 and a PC (personal computer) 700 as the sixth embodiment, as shown in FIGS. In the mobile phone 600 of FIG. 12, the liquid crystal display device 100 (200, 300, 40) is displayed on the display screen 600a.
0,500) is used. Further, the PC 700 in FIG. 13 can be used for an input unit such as a display screen 700a and a touch panel keyboard 700b. In addition, by incorporating the peripheral circuit in the substrate in the liquid crystal panel, the number of parts can be greatly reduced, and the apparatus body can be reduced in weight and size.

The embodiment disclosed this time is illustrative in all points and is not restrictive.
The scope of the present invention is shown not by the above description of the embodiments but by the scope of claims for patent, and further includes all modifications within the meaning and scope equivalent to the scope of claims for patent.

For example, in the first to fifth embodiments, the example in which the present invention is applied to pixels including four subpixels arranged in two rows and two columns has been described. However, the present invention is not limited to this, and the present invention is not limited to this. As long as the pixel is composed of sub-pixels composed of a plurality of columns, the present invention can also be applied to pixels having configurations other than 2 rows and 2 columns.

In the first to fifth embodiments, an example in which three colors of red, green, and blue are applied to the display sub-pixel has been described. However, the present invention is not limited to this, and colors other than the above-described colors are applied. May be.

In the first, third, and fourth embodiments, the FFS mode is applied to both the display subpixel and the viewing angle control subpixel. However, the present invention is not limited to this. For example, The present invention is also applicable to a lateral electric field type liquid crystal display device other than the FFS mode such as the IPS mode.

In the second and fifth embodiments, the FFS mode is applied to the display subpixel and the vertical electric field type driving method is applied to the viewing angle control subpixel. The present invention is not limited to this, and the present invention can be applied to combinations other than the above as long as at least the viewing angle control sub-pixels are driven using linearly polarized light.

1 pixel 1a, 1b, 1c, 201a, 201b, 201c, 301a, 301b
, 301c, 401c, 501c Display subpixels 1d, 201d, 301d, 40
1d, 501d Viewing angle control subpixel 2 Gate line 3 Signal line 10
First substrate 12, 312, 412 Common electrode 17 Pixel transistor 1
9a, 19c, 319a, 319c, 419a, 419c Pixel electrode 19b, 19
d, 219b, 219d, 319b, 319d, 419b, 419d Slit 2
0 Second substrate 212a, 512a Common electrode (first common electrode) 219a, 5
19a pixel electrode (first pixel electrode) 212b, 512b common electrode (second common electrode) 219c, 519c pixel electrode (second pixel electrode) 100, 200, 300
, 400, 500 Liquid crystal display device 600 Mobile phone (electronic device) 700 P
C (electronic equipment)

Claims (7)

Each is a four sub-pixel having a rectangular shape in plan view, red, and the sub-pixel display corresponding respectively to green and blue display, and the sub-pixel for viewing angle control for controlling the viewing angle Are arranged in a matrix of 2 rows and 2 columns, and the four sub-pixels have adjacent sides that have the same length in plan view, and each boundary extends linearly. is formed as a pixel of the outer peripheral shape is configured in a rectangular shape,
A pixel transistor provided in each of the four sub-pixels;
A plurality of gate lines that are connected to the gates of the pixel transistors and that extend in a straight line along the row direction of the sub-pixels between the pixels and between the sub-pixels in plan view; ,
A plurality of boundaries that are substantially orthogonal to the gate lines and extend linearly along the column direction of the sub-pixels when viewed in plan are provided between the pixels and the sub-pixels. A signal line for supplying a video signal to the display sub-pixel,
With
Among the four sub-pixels, the previous SL and the viewing angle controlling subpixel, and the display sub-pixels arranged in at least one of the viewing angle controlling subpixels arranged rows and columns, the field of view The display subpixels are arranged to have a larger area than the display subpixels other than the rows and columns in which the corner control subpixels are arranged, and the red display subpixels or the blue display subpixels. Are arranged adjacent to each other in the row direction of the viewing angle control subpixel, and the other is arranged adjacent to the column direction of the viewing angle control subpixel .
Liquid crystal display device. When viewed in plan, the viewing angle control subpixel and the red display subpixel or the blue display subpixel adjacent to the viewing angle control subpixel in the column direction are the green display. It is configured to have a larger area than the green display subpixel by being configured so that the length along the row direction is longer than the subpixel for use.
The liquid crystal display device according to claim 1. When viewed in plan, the viewing angle control subpixel and the red display subpixel or the blue display subpixel adjacent to the viewing angle control subpixel in the row direction are the green display. It is configured to have a larger area than the green display subpixel by being configured so that the length along the column direction is longer than the subpixel for use.
The liquid crystal display device according to claim 1. In plan view, the red display subpixel and the blue display subpixel are configured to be adjacent to the viewing angle control subpixel in the row direction and the column direction, respectively.
  One of the red or blue display subpixels adjacent to the viewing angle control subpixel in the column direction has a longer length in the row direction than the green display subpixel, and the row direction In other words, the other red or blue display subpixel adjacent to the viewing angle control subpixel has a longer length in the column direction than the green display subpixel. The area of both the red display pixel and the blue display subpixel is larger than the area of the display subpixel.
The liquid crystal display device according to claim 1. A first substrate and a second substrate provided so as to face each other and on which the display subpixel and the viewing angle control subpixel are formed;
  A common electrode formed on the first substrate;
  A pixel electrode including a plurality of slits and disposed on the common electrode so as to face each other with an insulating film provided between the display subpixel and the viewing angle control subpixel.
  The slit of the pixel electrode corresponding to the display subpixel and the slit of the pixel electrode corresponding to the viewing angle control subpixel are configured so that the extending direction of the slit is different in plan view. ,
The liquid crystal display device according to claim 1. A first substrate and a second substrate provided so as to face each other and on which the display subpixel and the viewing angle control subpixel are formed;
  A first common electrode formed in a region where the display subpixel is formed on the first substrate;
  A first pixel electrode disposed on the first common electrode so as to be opposed to each other through an insulating film and including a plurality of slits;
  A second pixel electrode formed in a region where the viewing angle control subpixel is formed on the first substrate;
  A second common electrode disposed on the second substrate in a region where the viewing angle control sub-pixel is formed so as to face the second pixel electrode;
Comprising
The liquid crystal display device according to claim 1. An electronic apparatus comprising the liquid crystal display device according to claim 1.

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