JP2011164471A - Liquid crystal display device and electronic apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To obtain a liquid crystal display device capable of obtaining a high image quality with a simple configuration. <P>SOLUTION: The liquid crystal display device includes: a first substrate wherein a common electrode, an insulating film, and a plurality of pixel electrodes 14 are formed in this order on a base; a second substrate disposed so as to be spaced from and face the surface of the first substrate on which the pixel electrodes 14 are formed; a liquid crystal layer disposed between the first and second substrates; and a light shield 39 which partially blocks light transmitted through the liquid crystal layer. Each pixel electrode 14 has a plurality of belt-like parts juxtaposed at intervals. The light shield 39 is disposed in a position corresponding to at least a part of the outermost belt-like part in the pixel electrode 14. This simple configuration reduces flicker and image persistence due to a flexo-electric effect to obtain a high image quality. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a liquid crystal display device driven by a lateral electric field driving method, and an electronic apparatus including the same.

  In recent years, liquid crystal display devices have become mainstream in display devices from the viewpoint of low power consumption, space saving, and the like. As one of liquid crystal driving methods, there is a lateral electric field driving method represented by an FFS (Fringe Field Switching) method and an IPS (In-Plane Switching) method. The lateral electric field driving method is a driving method in which display is performed by forming an electric field in a direction parallel to the substrate and rotating liquid crystal molecules having a dipole moment in a plane parallel to the substrate. In particular, the FFS method is often used because the electrode structure of the pixel is simple.

  In the lateral electric field driving method, a voltage is applied to each of the pixel electrode and the common electrode to form an electric field in a direction parallel to the substrate. When the liquid crystal is aligned in the direction of the electric field when a voltage is applied, alignment deformation such as so-called splay deformation (spread deformation) and bend deformation (bending deformation) occurs.

  In addition to the dipole moment, the liquid crystal molecules generally have a shape asymmetry as shown in FIGS. When alignment deformation such as splay deformation or bend deformation occurs in the liquid crystal composed of such liquid crystal molecules, polarization may be induced. That is, in the liquid crystal (nematic medium), when there is no alignment deformation, for example, as shown in FIGS. 34A and 35A, polarization as a whole does not occur, but when splay deformation occurs, For example, when polarization is induced as shown in FIG. 34B and bend deformation occurs, polarization is induced as shown in FIG. 35B, for example. This is known as the flexoelectric effect (Non-Patent Documents 1, 2, etc.).

  In the liquid crystal display device, so-called AC driving is generally performed in which the polarity of the potential difference between the voltage of the pixel electrode and the voltage of the common electrode is inverted at a constant period in order to prevent deterioration of the liquid crystal material. When the liquid crystal having the flexoelectric effect described above is used in such a liquid crystal display device, the polarization of the liquid crystal due to the flexoelectric effect described above can be obtained even if the polarity of the potential difference is reversed between positive and negative in AC driving. Is not simply inverted, the light transmittance in each pixel varies depending on the polarity of the polarity of the potential difference. In particular, when the liquid crystal is AC-driven (frame inversion driving) so as to invert the polarity of this potential difference for each frame, a frame (positive frame) in which the voltage of the pixel electrode is larger than the voltage of the common electrode, The light transmittance is different between the frame (negative frame) whose voltage is smaller than the voltage of the common electrode. As a result, the luminance of the liquid crystal display device fluctuates from frame to frame, flickering occurs on the screen, and the image quality deteriorates.

  Many studies have been made on methods for suppressing the influence on image quality caused by the flexoelectric effect. For example, in Patent Document 1, in the IPS system, a pixel is divided into two regions, and the arrangement of the pixel electrode and the common electrode is changed between the two regions, whereby an electric field is generated between the two regions. There has been proposed a liquid crystal display device whose directions are opposite to each other. With this configuration, there is no difference in light transmittance between pixels between the positive frame and the negative frame.

  Many studies have also been made on methods for making the flexoelectric effect less likely to occur. For example, Patent Document 2 proposes a liquid crystal display device using a liquid crystal having a molecular structure in which asymmetry is suppressed. This liquid crystal molecule is molecularly designed so that the asymmetry of the structure is small in the direction of the electron withdrawing group and the electron donating group.

  Some liquid crystal display devices are provided with a light-shielding layer in part of pixels (for example, Patent Documents 3 to 6). In the IPS system, this light shielding layer is provided to shield a portion where the alignment of the liquid crystal is disturbed due to an unintended electric field generated between the pixel electrode and the pixel signal line. In other words, a portion where the alignment control of the liquid crystal cannot be sufficiently controlled due to the pixel signal is shielded from light so that the portion does not affect the display.

Japanese Patent No. 3668844 JP 2009-167228 A JP 2002-131767 A JP 2002-131780 A Japanese Patent Laid-Open No. 10-186407 JP 2009-103925 A

J. S. Patel and Robert B. Meyer, "Flexoelectric electro-optics of a cholesteric liquid crystal", Physical Review Letters, Volume 58, pp1538-1540, 1987. J. S. Patel and Sin-Doo Lee, "Fast linear electro-optic effect based on cholesteric liquid crystals", Journal of Applied Physics, Volume 66, pp1879-1881, 1989.

  However, in the liquid crystal display device disclosed in Patent Document 1, the electrode structure of the pixel is complicated. In the liquid crystal display device disclosed in Patent Document 2, since the molecular structure of the liquid crystal is complicated, the material cost may be increased, and the viscosity and birefringence of the liquid crystal may be decreased. In addition, for example, when there are various required specifications, it is necessary to design a molecule in order to obtain a molecular structure that can satisfy them, and there is a risk that development costs may be required.

  Although Patent Documents 3 to 6 disclose a method of suppressing image quality degradation caused by pixel signals in an IPS liquid crystal display device, there is no description about the flexoelectric effect, and thus the flexoelectric effect is improved. No specific method for suppressing the resulting image quality degradation is disclosed.

  The present invention has been made in view of such problems, and an object thereof is to provide a liquid crystal display device and an electronic apparatus that can realize high image quality with a simple configuration without complicating the electrode structure and the molecular structure of the liquid crystal. There is.

  The liquid crystal display device of the present invention includes a first substrate, a second substrate, a liquid crystal layer, and a light shielding body. The first substrate is formed by sequentially forming a common electrode, an insulating film, and a plurality of pixel electrodes on a base. The second substrate is spaced apart from the surface of the first substrate on which the pixel electrodes are formed. The liquid crystal layer is disposed between the first and second substrates. The light shielding body partially shields light transmitted through the liquid crystal layer. The pixel electrode has a plurality of strip-like portions arranged in parallel at intervals. The above-described light shielding body is provided at a position corresponding to at least a part of the outermost band-like portion in the pixel electrode. For example, it is preferable that the light shielding body is provided at a position corresponding to at least the central portion in the width direction of the outermost belt-like portion. Here, “parallel arrangement” means that they are arranged side by side, and they are not necessarily arranged in parallel with each other, and may be arranged so as to deviate from parallel.

  An electronic apparatus according to the present invention includes the liquid crystal display device according to the present invention, and includes, for example, a television set, a digital camera, a personal computer, a video camera, or a mobile terminal device such as a mobile phone.

  In the liquid crystal display device and the electronic apparatus of the present invention, orientation deformation such as splay deformation and bend deformation occurs in the outermost band-like portion of the pixel electrode, and polarization may be induced due to the flexoelectric effect. Therefore, when the polarity of the potential difference between the pixel electrode voltage and the common electrode voltage is reversed between positive and negative in AC driving, the light transmittance in the corresponding liquid crystal portion differs depending on the polarity of the potential difference. At that time, the light shield blocks light so that light does not pass through the liquid crystal portion. As a result, there is no difference in the light transmittance of the pixels between the positive frame and the negative frame, and the flicker of the screen is reduced.

  In the liquid crystal display device of the present invention, the light shielding body may be provided at a position corresponding to the inter-pixel electrode region in a direction orthogonal to the longitudinal direction of the strip-shaped portion, for example. In this case, the light shield may be provided on either the first or second substrate as described below.

  When the light shielding body is provided on the first substrate, for example, a plurality of first wirings extending in the longitudinal direction of the belt-shaped portion may be used as the light shielding body. In addition, the light shielding body may be formed of the same material in the same layer as the plurality of second wirings extending in a direction orthogonal to the longitudinal direction of the band-shaped portion, for example. Further, for example, the light shielding member may be provided separately from the first wiring and in a different layer from the second wiring.

  When the light shielding body is provided on the second substrate, for example, the black matrix of the color filter layer of the second substrate may be used as the light shielding body.

  Further, in the case where the second substrate includes a color filter layer having, for example, a red color filter, a green color filter, and a blue color filter, the light shielding body includes at least a pixel electrode corresponding to the green color filter and an adjacent pixel electrode. You may provide in the position corresponding to both the pixel electrode area | regions to perform.

  According to the liquid crystal display device and the electronic apparatus of the present invention, since the light-shielding body is provided at a position corresponding to at least a part of the outermost band-like portion in the pixel electrode, the portion where the flexoelectric effect has occurred is transmitted Light can effectively prevent the display from being adversely affected, and high image quality can be realized with a simple configuration.

1 is a block diagram illustrating a configuration example of a liquid crystal display device according to a first embodiment. FIG. 2 is a circuit diagram illustrating a configuration example of a display unit illustrated in FIG. 1. FIG. 4 is a plan view illustrating a configuration example of a display unit illustrated in FIG. 3. It is sectional drawing showing the schematic sectional structure of the display part shown in FIG. FIG. 4 is another cross-sectional view illustrating a schematic cross-sectional structure of the display unit illustrated in FIG. 3. It is an expansion perspective view of the principal part of the display part shown in FIG. It is sectional drawing for demonstrating operation | movement of the display part shown in FIG. It is a top view showing the example of 1 structure of the display part which concerns on a comparative example. FIG. 9 is a characteristic diagram illustrating characteristics of the liquid crystal display device illustrated in FIG. 8. It is a schematic diagram showing the orientation deformation | transformation in the liquid crystal display device shown in FIG. FIG. 9 is another characteristic diagram illustrating characteristics of the liquid crystal display device illustrated in FIG. 8. FIG. 9 is a characteristic diagram illustrating another characteristic of the liquid crystal display device illustrated in FIG. 8. It is a top view showing the example of 1 structure of the display part which concerns on the modification of 1st Embodiment. It is a top view showing the example of 1 structure of the display part which concerns on 2nd Embodiment. It is sectional drawing showing the schematic sectional structure of the display part shown in FIG. It is a top view showing the example of 1 structure of the display part which concerns on 3rd Embodiment. FIG. 17 is a cross-sectional view illustrating a schematic cross-sectional structure of the display unit illustrated in FIG. 16. It is a top view showing the example of 1 structure of the display part which concerns on 4th Embodiment. It is sectional drawing showing the schematic sectional structure of the display part shown in FIG. It is sectional drawing showing the schematic sectional structure of the display part which concerns on the modification of 4th Embodiment. It is a top view showing the example of 1 structure of the display part which concerns on 5th Embodiment. It is sectional drawing showing the schematic sectional structure of the display part shown in FIG. It is a top view showing the example of 1 structure of the display part which concerns on the modification of 5th Embodiment. FIG. 24 is a cross-sectional view illustrating a schematic cross-sectional structure of the display unit illustrated in FIG. 23. It is a top view showing the example of 1 structure of the display part which concerns on 6th Embodiment. FIG. 26 is a cross-sectional view illustrating a schematic cross-sectional structure of the display unit illustrated in FIG. 25. It is a top view showing the example of 1 structure of the display part which concerns on the modification of 6th Embodiment. It is sectional drawing showing the schematic sectional structure of the display part shown in FIG. It is a perspective view showing the appearance composition of application example 1 among liquid crystal display devices to which an embodiment is applied. 12 is a perspective view illustrating an appearance configuration of an application example 2. FIG. 12 is a perspective view illustrating an appearance configuration of an application example 3. FIG. 14 is a perspective view illustrating an appearance configuration of an application example 4. FIG. FIG. 10 is a front view, a side view, a top view, and a bottom view illustrating an appearance configuration of an application example 5. It is a schematic diagram for demonstrating a flexoelectric effect. It is another schematic diagram for demonstrating a flexoelectric effect.

Hereinafter, embodiments will be described in detail with reference to the drawings. The description will be given in the following order.
1. First Embodiment 2. FIG. Second Embodiment 3. FIG. Third embodiment 4. 4. Fourth embodiment Fifth Embodiment Sixth Embodiment Application examples

<1. First Embodiment>
[Configuration example]
FIG. 1 illustrates a configuration example of the liquid crystal display device according to the first embodiment. The liquid crystal display device 1 is configured to shield light passing through a part of a pixel electrode corresponding to a portion where a flexoelectric effect is likely to occur in an FFS liquid crystal display device. The liquid crystal display device 1 includes a display control unit 2, a common signal driver 3, a gate driver 4, and a source driver 5.

  The display control unit 2 stores and holds the supplied image signal Vsig for each screen (for each display of one frame), for example, in a frame memory configured by SRAM (Static Random Access Memory) or the like. The display control unit 2 has a function of controlling the common signal driver 3, the gate driver 4, and the source driver 5 that drive the display unit 6 to operate in conjunction with each other. Specifically, the display control unit 2 supplies a common signal timing control signal to the common signal driver 3, supplies a scanning timing control signal to the gate driver 4, and images stored in the frame memory to the source driver 5. An image signal and a display timing control signal for one horizontal line based on the signal are supplied.

  The common signal driver 3 is a circuit that supplies the common signal Vcom to the display unit 6 in accordance with the common signal timing control signal supplied from the display control unit 2. In this example, the display unit 6 is driven by frame inversion. That is, the common signal driver 3 inverts and outputs the common signal Vcom every time the display unit 6 displays one frame.

  The gate driver 4 has a function of selecting a pixel Pix (described later) in the display unit 6 that is a target of display driving in accordance with a scanning timing control signal supplied from the display control unit 2. Specifically, the gate driver 4 applies the scanning signal Vscan to the gate (described later) of the transistor Tr of the pixel Pix via the scanning signal line GCL, so that the pixels formed in the display unit 6 in a matrix form. One row of Pix is selected as a display drive target. These pixels Pix display one horizontal line in accordance with a pixel signal Vpix (described later) supplied from the source driver 5. In this way, the gate driver 4 operates so as to scan one horizontal line at a time in a time-division manner and display over the entire display surface of the display unit 6.

  The source driver 5 is a circuit that supplies an image signal for one horizontal line supplied from the display control unit 2 to each pixel Pix in the display unit 6 as a pixel signal Vpix. Specifically, the source driver 5 supplies the pixel signal Vpix to each pixel Pix constituting one horizontal line selected by the gate driver 4 via the pixel signal line SGL.

  The display unit 6 displays an image based on the pixel signal Vpix supplied from the source driver 5. Below, with reference to FIGS. 2-6, the structural example of the display part 6 is demonstrated.

  FIG. 2 illustrates a circuit configuration example of the pixel of the display unit 6. The display unit 6 has a plurality of pixels Pix arranged in a matrix. As shown in FIG. 2, the pixel Pix includes a transistor Tr and a liquid crystal element LC. The transistor Tr is composed of, for example, a thin film transistor (TFT) or the like. In this example, the transistor Tr is composed of an n-channel MOS (Metal Oxide Semiconductor) TFT. The transistor Tr has a source connected to the pixel signal line SGL, a gate connected to the scanning signal line GCL, and a drain connected to the liquid crystal element LC via the pixel electrode 14 (not shown). One of the liquid crystal elements LC is connected to the drain of the transistor Tr via the pixel electrode 14 (not shown), the other is connected to the common electrode 13 (not shown), and the common signal Vcom is supplied from the common signal driver 3. Is done.

  As shown in FIG. 2, the pixel Pix is connected to another pixel Pix belonging to the same row of the display unit 6 by the scanning signal line GCL. The scanning signal line GCL is connected to the gate driver 4, and the scanning signal Vscan is supplied from the gate driver 4. The pixel Pix is connected to another pixel Pix belonging to the same column of the display unit 6 by the pixel signal line SGL. The pixel signal line SGL is connected to the source driver 5, and the pixel signal Vpix is supplied from the source driver 5.

  FIG. 3 illustrates a configuration example of the display unit 6. As shown in FIG. 3, the pixel Pix includes the pixel electrode 14 and the light shielding body 39. The pixel electrode 14 is made of, for example, ITO (Indium Tin Oxide) or the like. As shown in FIG. 3, the pixel electrode 14 has a shape in which a plurality of strip-like portions arranged in parallel at intervals are connected to each other at both longitudinal ends. It has a transparent electrode. The pixel electrode 14 and the transistor Tr are connected via a contact CONT. The light shielding body 39 is provided in a portion corresponding to the electrode disposed on the outermost side among the plurality of strip-shaped portions of the pixel electrode 14. Although not shown in FIG. 3, the common electrode 13 is formed over the entire surface of the layer below the pixel electrode 14 as will be described later. Similarly to the pixel electrode 14, the common electrode 13 is also a transparent electrode configured using, for example, ITO.

  4 represents a schematic cross-sectional structure in the direction of arrows IV-IV of the display unit 6 shown in FIG. 3, and FIG. 5A represents a schematic cross-sectional structure in the direction of arrows V-V. is there. The display unit 6 includes an array substrate 10, a color filter substrate 20, and a liquid crystal layer 9.

  In the array substrate 10, three layers of insulating films 121 to 123, a common electrode 13, an insulating film 124, a pixel electrode 14, and an alignment film 15 (not shown) are sequentially formed on the surface of the TFT substrate 11 that contacts the liquid crystal layer 9. It is a thing. The common electrode 13 is formed over the entire surface of the insulating film 123. A polarizing plate 16 is formed on the opposite surface of the TFT substrate 11.

  In the color filter substrate 20, a color filter 22 and an alignment film 23 (not shown) are sequentially formed on the surface of the counter substrate 21 that is in contact with the liquid crystal layer 9. The color filter 22 is configured by periodically arranging, for example, three color filters of red (R), green (G), and blue (B). The color filter 22 is formed with a black matrix (not shown) in order to prevent light from being blocked at portions other than the openings and to prevent color mixing of the three colors emitted from the adjacent three color filters. A polarizing plate 24 is formed on the opposite surface of the counter substrate 21.

  The liquid crystal layer 9 modulates light passing therethrough in accordance with the state of the electric field, and FFS mode (lateral electric field mode) liquid crystal is used.

  As shown in FIG. 4, the transistor Tr is formed in the same layer as the insulating films 121 to 123. The gate electrode 31 of the transistor Tr is formed on the TFT substrate 11. The gate electrode 31 utilizes the scanning signal line GCL. That is, the gate electrode 31 is constituted by a part of the scanning signal line GCL formed on the TFT substrate 11. An insulating film 121 is formed on the gate electrode 31 (scanning signal line GCL), and a semiconductor layer 40 is further formed thereon. That is, the insulating film 121 functions as a gate insulating film in the MOS structure in the transistor Tr.

  The semiconductor layer 40 includes a channel layer 41, a source region 42, a drain region 43, and LDD (Lightly Doped Drain) regions 44 and 45. The semiconductor layer 40 is made of, for example, amorphous silicon, polysilicon, single crystal silicon, or the like. In the channel layer 41, a channel is formed according to the voltage of the gate electrode 31. The source region 42 and the drain region 43 are doped with an impurity such as an n-type impurity. The LDD regions 44 and 45 are doped with impurities so that the impurity concentration is lower than that of the source region 42 and the drain region 43. The LDD region 44 is formed between the channel layer 41 and the source region 42, and the LDD region 45 is formed between the channel layer 41 and the drain region 43.

  An insulating film 122 is formed on the semiconductor layer 40. A source electrode 32 and a drain electrode 33 are formed on the insulating film 122, and are connected to the source region 42 and the drain region 43 through contact holes, respectively. The source electrode 42 is connected to a pixel signal line SGL (FIG. 5A) formed in the same layer. The drain electrode 33 is connected to the pixel electrode 14 via the contact CONT.

  As shown in FIG. 5A, the light shielding body 39 is formed on the TFT substrate 11 and is located at a position corresponding to the outermost band-shaped portion of the plurality of band-shaped portions of the pixel electrode 14. Has been placed. In the example shown in FIG. 5A, the light shield 39 is formed in the same layer as the scanning signal line GCL (FIG. 4) and is formed of the same material as the scanning signal line GCL. For this reason, the light shield 39 and the scanning signal line GCL can be simultaneously formed in the same manufacturing process. The light shield 39 is not connected to the scanning signal line GCL and is electrically insulated from the surroundings.

  FIG. 6 shows an example of the display operation of the liquid crystal element, and shows the directions of the polarizing plate and the alignment film. As shown in FIG. 6, the polarizing plate 16 and the polarizing plate 24 are arranged in a crossed Nicols state. That is, in this example, the transmission axis of the polarizing plate 16 is set in a direction orthogonal to the longitudinal direction of the strip-like portion of the pixel electrode 14 or a direction slightly inclined from the direction, and the transmission axis of the polarizing plate 24 is It is set in the longitudinal direction of the strip-like portion of the pixel electrode 14 or in a direction slightly angled from that direction. The rubbing directions of the alignment film 15 and the alignment film 23 are both set to coincide with the transmission axis of the polarizing plate 24.

  Here, the array substrate 10 corresponds to a specific example of “first substrate” in the present invention, and the color filter substrate 20 corresponds to a specific example of “second substrate” in the present invention. The insulating film 124 corresponds to a specific example of “an insulating film” in the invention. The pixel signal line SGL corresponds to a specific example of “first wiring” in the invention, and the scanning signal line GCL corresponds to a specific example of “second wiring” in the invention. The color filter 22 corresponds to a specific example of “color filter layer” in the invention.

[Operation and Action]
Next, the operation and action of the liquid crystal display device 1 of the present embodiment will be described.

(Overview of overall operation)
The display control unit 2 supplies an image signal for one horizontal line to the source driver 5 based on the supplied image signal Vsig, and outputs a timing control signal to the common signal driver 3, the gate driver 4, and the source driver 5. Supply and control to operate in conjunction. The common signal driver 3 generates a common signal Vcom for performing frame inversion driving and supplies it to the display unit 6. The gate driver 4 generates a scanning signal Vscan and supplies it to the display unit 6 through the scanning signal line GCL. The source driver 5 generates a pixel signal Vpix based on an image signal for one horizontal line, and supplies the pixel signal Vpix to the display unit 6 via the pixel signal line SGL. The display unit 6 displays one horizontal line at a time based on the supplied pixel signal Vpix, scanning signal Vscan, and common signal Vcom, and displays an image on the display unit 6 by line sequential scanning.

(LCD operation)
Next, the operation of the FFS mode liquid crystal will be described with reference to FIGS.

  6A shows an example of the display operation of the liquid crystal element in a state where there is no potential difference between the pixel electrode and the common electrode (voltage is not applied), and FIG. 6B is a state where there is a potential difference (voltage applied state). An example of display operation of the liquid crystal element is shown. FIG. 7 shows an example of the operation of liquid crystal molecules, where (A) shows a voltage non-applied state and (B) shows a voltage applied state.

  When no voltage is applied to the liquid crystal molecules 91 of the liquid crystal layer 9, as shown in FIGS. 6A and 7A, the axis of the liquid crystal molecules 91 is orthogonal to the transmission axis of the polarizing plate 16, and The polarizing plate 24 is parallel to the transmission axis (FIG. 6A). Therefore, the incident light h transmitted through the polarizing plate 16 reaches the polarizing plate 24 without causing a phase difference in the liquid crystal layer 9 and is absorbed by the polarizing plate 24. That is, in a state where no voltage is applied, this pixel displays black. On the other hand, in the voltage application state, as shown in FIGS. 6B and 7B, the axis of the liquid crystal molecules 91 is shifted in the direction deviated from the longitudinal direction of the band-like portion of the pixel electrode 14 by the lateral electric field E. Rotate. When the liquid crystal molecule 91 located at the center in the thickness direction of the liquid crystal layer 9 rotates 45 degrees from the longitudinal direction of the strip portion of the pixel electrode 14, the incident light h transmitted through the polarizing plate 16 passes through the liquid crystal layer 9. A phase difference is generated during the passage, and the light reaches linearly polarized light rotated by 90 degrees to reach the polarizing plate 24 and passes through the polarizing plate 24. That is, in a state where a potential difference is applied so that the liquid crystal molecules 91 rotate 45 degrees, this pixel displays white.

(Operation of the light-shielding body)
As shown in FIGS. 3 and 5A, a light shield 39 is provided in a portion corresponding to the outermost band-like portion of the plurality of band-like portions of the pixel electrode 14. The portion where the light shielding body 39 is disposed is a portion where the influence of the flexoelectric effect appears remarkably as will be described later in the comparative example. Specifically, when no light shield is disposed in this portion, a difference in light transmittance occurs between the positive frame and the negative frame, and flicker occurs. In addition, so-called burn-in occurs in which the past display state affects the current display. In the liquid crystal display device 1, flickering and image sticking can be reduced and high image quality can be realized by providing a light shielding body in a portion where the influence of the flexoelectric effect is noticeable.

[Comparative example]
Next, a liquid crystal display device according to a comparative example will be described. In this comparative example, the liquid crystal display device is configured by using the display unit 6R that does not have a light shield. Other configurations are the same as those of the first embodiment (FIGS. 1 and 3). Note that components that are substantially the same as those of the liquid crystal display device 1 according to the first embodiment are given the same reference numerals, and descriptions thereof are omitted as appropriate.

  FIG. 8 illustrates a configuration example of the display unit 6R according to the comparative example. Unlike the display unit 6 (FIG. 3) according to the first embodiment, the pixel Pix of the display unit 6R is not provided with a light shield.

  FIG. 9A shows a simulation value of transmittance taking into account the flexoelectric effect in the line segment IX-IX of the display unit 6R shown in FIG. 8, and FIG. 9B shows the direction of the arrow IX-IX. FIG. 2 shows a schematic diagram of a cross-sectional structure and a horizontal electric field. In FIG. 9B, as shown in FIG. 8, S indicates the interval between the pixel electrodes 14 of the pixels Pix adjacent to each other, and L indicates the electrode width of the strip-like portion of the pixel electrode 14. FIG. 10 shows a schematic diagram of splay deformation and bend deformation generated in the display unit 6R.

  As shown in FIG. 9A, the transmittance A1 of the positive frame and the transmittance A2 of the negative frame are greatly different in transmittance at two locations on the pixel electrode 14 and between the pixel electrodes 14. This is because, as shown in FIG. 10, the splay deformation of the liquid crystal is greatly generated on the pixel electrode 14 and the bend deformation of the liquid crystal is largely generated between the pixel electrodes 14. That is, in these places, the liquid crystal is easily polarized due to the flexoelectric effect, and there is a difference in transmittance between the positive frame and the negative frame.

  FIG. 11 shows the polarization difference between the positive and negative frames of the liquid crystal in the vicinity of the outermost band-like portion of the pixel electrode 14 in the display unit 6R shown in FIG. The simulation value of the polarization difference when changing the electrode spacing S (space) ratio (line-space ratio) L / S is shown. Here, the line / space ratio L / S is changed by fixing the electrode width L and changing the electrode spacing S. In FIG. 11, B1 indicates the polarization difference when the electrode interval S is large as shown in FIG. 8, and B2 indicates the electrode interval S as the distance S2 (between the band-shaped portions in the pixel electrode 14). FIG. 8 shows the polarization difference when the distance is reduced to the same distance as in FIG. In other words, B1 indicates the polarization difference of the liquid crystal in the vicinity of the outermost strip portion of the pixel electrode 14, and B2 indicates, for example, the liquid crystal in the vicinity of the strip portion positioned near the center of the pixel electrode 14. The polarization difference is shown. The result of this simulation is that the polarization difference of the liquid crystal in the positive and negative frames caused by the flexoelectric effect is the outermost band portion of the pixel electrode 14 as compared with the vicinity of the band portion near the center of the pixel electrode 14 (B2). It means that it increases in the vicinity (B1). This causes a difference in light transmittance between the positive frame and the negative frame, particularly near the outermost band-like portion of the pixel electrode 14.

  As described above, in the liquid crystal display device according to the comparative example, the light transmittance is different between the positive frame and the negative frame in the vicinity of the outermost band-like portion of the pixel electrode 14, so that the luminance of the liquid crystal display device is the frame It fluctuates every time and flicker occurs.

  On the other hand, in the liquid crystal display device 1 according to the first embodiment, as shown in FIG. 3, the pixel Pix corresponds to the outermost band-like portion of the pixel electrode 14 where the transmittance difference is the largest. A light shield 39 is provided at the position. Thereby, flicker can be reduced and high image quality can be realized. In the inter-pixel electrode region, as shown in FIG. 3, since the light is shielded by the pixel signal line SGL, flicker hardly occurs.

  The flexoelectric effect also causes a so-called burn-in in which the past display state affects the current display. Hereinafter, image sticking of the liquid crystal display device according to the comparative example will be described.

  FIG. 12 illustrates an example of measurement results of image sticking when the liquid crystal display device according to the comparative example is used. The image sticking was measured as follows. First, a gray raster screen (entire gray screen) was displayed, and a transmittance distribution of pixels was obtained. Next, a black and white checkered flag screen was displayed for several hours. Finally, the gray raster screen was displayed again to obtain the pixel transmittance distribution. Then, the change in the transmittance distribution of the screen between when the first gray raster screen was displayed and when the last gray raster screen was displayed was obtained. In FIG. 12, (A) represents the change in the transmittance distribution before and after the burn-in test in the pixel displaying black in the checker flag screen, and (B) represents the white color. The change in the transmittance distribution in the displayed pixel is expressed in color, and (C) shows the relationship between the change in transmittance and the color. As shown in FIG. 12, the transmittance of the pixel displaying white is greatly changed over the entire pixel. In particular, the transmittance in the vicinity of the outermost band-like portion of the pixel electrode changes greatly. That is, so-called burn-in occurs in the liquid crystal display device according to the comparative example.

  This phenomenon of burn-in is considered to occur as follows. That is, in the liquid crystal display device according to the comparative example, as shown in FIG. 11, a polarization difference is generated in the positive and negative frames due to the flexoelectric effect. When AC driving is performed, even if potentials of the same magnitude are applied in the positive and negative frames, different potentials (residual DC potential differences) continue to be applied in both frames due to this polarization difference. Due to this residual DC potential difference, impurity ions in the cell accumulate near the alignment film of the pixel electrode. Impurity ions accumulated in the alignment film due to differences in the mobility of impurity ions and the like are accumulated in the alignment film for a long time. In this state, a voltage is always applied without applying a potential to the liquid crystal cell. Since the pixel that has been displayed in white is in a state in which an extra voltage is applied to the actually applied potential by the residual DC potential difference, the luminance changes as compared with the portion that has been displayed in black. This is a cause of burn-in.

  Thus, in the liquid crystal display device according to the comparative example, so-called burn-in, in which the past display state affects the current display, is likely to occur, and the image quality is likely to deteriorate.

  On the other hand, in the liquid crystal display device 1 according to the first embodiment, the light shielding body 39 is provided at a position corresponding to the outermost band-like portion of the pixel electrode 14 in which the burn-in is most likely to occur in the pixel Pix. . As a result, the influence of burn-in on the display can be reduced, and high image quality can be realized.

[effect]
As described above, in this embodiment, since the light shielding member is disposed at a position corresponding to the outermost band-like portion of the pixel electrode, high image quality can be realized by reducing flicker and image sticking.

  In this embodiment, since the light shielding body is formed using the same material in the same layer as the scanning signal line GCL, the structure is simplified, and it is necessary to add a manufacturing process for forming the light shielding body. Therefore, an increase in manufacturing cost can be suppressed.

[Modification 1-1]
In the above embodiment, the pixel electrode is constituted by a plurality of straight strip portions as shown in FIG. 3, but is not limited to this, and for example, shown in FIG. 13. As described above, a plurality of bent belt-like portions may be used.

[Other variations]
In the above embodiment, the light shielding member 39 is disposed in the entire region corresponding to the outermost band-shaped portion of the plurality of band-shaped portions of the pixel electrode 14, but the present invention is not limited to this. For example, a light shielding body may be disposed in a part of the region corresponding to the outermost band-like portion. In this case, it is desirable to provide a light shielding body at least at a position corresponding to the central portion in the width direction of the belt-like portion. This is because, as shown in FIG. 9, there is a significant difference in the light transmittance between the positive frame and the negative frame at the central portion (the left end and the right end in FIG. 9A) of the belt-like portion. Moreover, you may arrange | position a light-shielding body larger than this strip | belt-shaped part so that the whole area | region corresponding to the outermost strip | belt-shaped part may be included.

  FIG. 5B shows the positional relationship between the pixel electrode and the light shield. The light shield 39A is formed in a region corresponding to the center in the width direction of the outermost band-like portion. The light shields 39B and 39C include a region corresponding to the central portion in the width direction of the belt-like portion, and are formed in a slightly wider region than the light shield 39A. The light shield 39D is formed so as to include the entire region corresponding to the outermost band-like portion.

  In the above embodiment, the light shielding body is formed using the same material in the same layer as the scanning signal line GCL, but the present invention is not limited to this. For example, a material different from that of the scanning signal line GCL may be used in the same layer as the scanning signal line GCL. For example, the same material may be used for the same layer as the pixel signal line SGL, and the pixel signal line SGL may be formed separately from the pixel signal line SGL.

<2. Second Embodiment>
Next, a liquid crystal display device according to a second embodiment will be described. This embodiment is different from the first embodiment in the location of the light shield in the pixel. That is, in the first embodiment (FIG. 3), the light shield is disposed at a position corresponding to the outermost band-like portion of the pixel electrode. Instead, in the present embodiment, they are adjacent to each other. A light shield is also disposed at a position corresponding to the inter-pixel electrode region of the pixel. Other configurations are the same as those of the first embodiment (FIGS. 1 and 3). Note that components that are substantially the same as those of the liquid crystal display device according to the first embodiment are denoted by the same reference numerals, and description thereof is omitted as appropriate.

  FIG. 14 illustrates a configuration example of the display unit 51 according to the present embodiment, and FIG. 15 illustrates a schematic cross-sectional structure of the display unit 51 illustrated in FIG. 14 in the XV-XV arrow direction. . The display unit 51 includes a light shielding body 52. The light shield 52 is provided from a position corresponding to the outermost band-like portion of the pixel electrode 14 to a position corresponding to the outermost band-like portion of the pixel electrode 14 of the adjacent pixel. That is, in addition to the position corresponding to the outermost band-like portion of the pixel electrode 14, the light shielding body 52 is also provided at a position corresponding to the inter-pixel electrode region of the adjacent pixel Pix. As in the first embodiment (FIGS. 4 and 5), the light shield 52 is formed in the same layer as the scanning signal line GCL (FIG. 4) and is formed of the same material as the scanning signal line GCL. That is, the light shield 39 and the scanning signal line GCL can be formed simultaneously in the same manufacturing process. The light shield 39 is not connected to the scanning signal line GCL and is electrically insulated from the surroundings.

  In the display unit 51, by providing the light shielding body 52, the influence of the flexoelectric effect on the display image can be reduced as in the first embodiment. In particular, since the light shield 52 shields light passing through the inter-pixel electrode region, the light shield 52 is shielded only by the pixel signal line without providing the light shield in the inter-pixel electrode region (the first embodiment). In comparison, flicker can be reduced more reliably.

  As described above, in the present embodiment, since the light-shielding body is disposed at the position corresponding to the pixel electrode of the adjacent pixels in addition to the position corresponding to the outermost strip portion of the pixel electrode, flicker is further reduced. And high image quality can be realized. Other effects are the same as in the case of the first embodiment.

  In the above embodiment, the light shielding body is formed using the same material as the scanning signal line GCL. However, the present invention is not limited to this, and instead, for example, a material different from the scanning signal line GCL is used. May be formed.

<3. Third Embodiment>
Next, a liquid crystal display device according to a third embodiment will be described. In the present embodiment, the pixel signal line is also used as a light shield. Other configurations are the same as those in the first embodiment (FIGS. 1 and 3). Note that components that are substantially the same as those of the liquid crystal display device according to the first embodiment are denoted by the same reference numerals, and description thereof is omitted as appropriate.

  FIG. 16 illustrates a configuration example of the display unit 54 according to the present embodiment, and FIG. 17 illustrates a schematic cross-sectional structure of the display unit 54 illustrated in FIG. 16 in the XVII-XVII arrow direction. . The display unit 54 includes a pixel signal line SGL2. The pixel signal line SGL2 is formed thick and overlaps with the outermost band-like portion of the pixel electrodes 14 of the pixels Pix adjacent to both sides thereof.

  The pixel signal line SGL2 corresponds to a specific example of “first wiring” in the invention, and also corresponds to a specific example of “light shielding body”.

  Since the pixel signal line SGL2 is made of metal and blocks light, the pixel signal line SGL2 has the same effect as the light blocking body in the first embodiment. That is, the display unit 54 can reduce the influence of the flexoelectric effect on the display image by providing the pixel signal line SGL2 as in the first embodiment.

  As described above, in the present embodiment, the pixel signal line is thickened so as to extend to a position corresponding to the outermost strip portion of the pixel electrode adjacent to the pixel signal line. Since a body is not provided, the structure is simple, and a light shielding function can be provided without the need to add a manufacturing process. Other effects are the same as those in the first embodiment.

<4. Fourth Embodiment>
Next, a liquid crystal display device according to a fourth embodiment will be described. In the present embodiment, a black matrix for preventing color mixture is used as a light shielding body for reducing the influence of the flexoelectric effect on a display image. Other configurations are the same as those in the first embodiment (FIGS. 1 and 3). Note that components that are substantially the same as those of the liquid crystal display device according to the first embodiment are denoted by the same reference numerals, and description thereof is omitted as appropriate.

  18 shows a configuration example of the display unit 57 according to the present embodiment, and FIG. 19 shows a schematic cross-sectional structure of the display unit 57 shown in FIG. 18 in the XIX-XIX arrow direction. . The display unit 57 includes a light shield 58. As in the second embodiment, the light shield 58 extends from a position corresponding to the outermost band-like portion of the pixel electrode 14 to a position corresponding to the outermost band-like portion of the pixel electrode 14 of the adjacent pixel. Is provided. The light shield 58 is formed on the color filter 22 as a so-called black matrix. In other words, in the display portion 57, the black matrix provided in the color filter is formed so as to extend to a portion where the flexoelectric effect affects the display image.

  The display unit 57 can reduce the influence of the flexoelectric effect on the display image by providing the light shielding body 58 in the color filter 22 as in the first embodiment. In particular, since the light shield 58 is in contact with the liquid crystal layer 9 whose light transmittance is changed by the flexoelectric effect, the incident light transmitted through the polarizing plate 16 is obliquely deviated from the direction perpendicular to the polarizing plate 16. Even with respect to the incident light from the direction, it can be effectively shielded.

  As described above, in this embodiment, since the light shielding body is configured by using the black matrix of the color filter, it is not necessary to add a manufacturing process and it is not necessary to provide a dedicated light shielding body, so that a simple configuration can be realized.

  In the present embodiment, since the light shielding body is formed in the portion close to the liquid crystal layer 9, it is possible to effectively shield the incident light from the oblique direction.

  Other effects are the same as those in the first embodiment.

[Modification 4-1]
In the above embodiment, the light shielding body is configured using the black matrix of the color filter. However, the present invention is not limited to this, and for example, a normal color mixing prevention on the other layer of the color filter substrate or the array substrate side. In addition to the above, a black matrix may be provided to suppress image quality deterioration due to the flexoelectric effect, or a dedicated black matrix for suppressing image quality deterioration due to the flexoelectric effect may be provided. It may be provided separately. FIG. 20 shows a schematic cross-sectional structure when a black matrix is provided on the array substrate side. The black matrix is provided between the insulating film 121 and the insulating film 122, and the light blocking body 58B is configured using the black matrix.

[Modification 4-2]
In the above embodiment, the color filter is provided on the color filter substrate 20, but the present invention is not limited to this. For example, the color filter may be provided on the array substrate 10.

<5. Fifth embodiment>
Next, a liquid crystal display device according to a fifth embodiment will be described. In the present embodiment, a liquid crystal display device is configured using a display portion 61 in which dummy electrodes are arranged between pixel electrodes. Other configurations are the same as those in the first embodiment (FIGS. 1 and 3). Note that components that are substantially the same as those of the liquid crystal display device according to the first embodiment are denoted by the same reference numerals, and description thereof is omitted as appropriate.

  FIG. 21 illustrates a configuration example of the display unit 61 according to the present embodiment, and FIG. 22 illustrates a schematic cross-sectional structure of the display unit 61 illustrated in FIG. 21 in the XXII-XXII arrow direction. . The display unit 61 includes a dummy electrode 62. The dummy electrode 62 is disposed in the inter-pixel electrode region of the adjacent pixels Pix. The interval between the dummy electrode 62 and the pixel electrode 14 is set to be the same as the interval S <b> 2 between the plurality of strip-shaped portions in the pixel electrode 14. The dummy electrode 62 is formed in the same layer as the pixel electrode 14 and is formed of the same material as the pixel electrode 14. That is, the dummy electrode 62 and the pixel electrode 14 can be formed at the same time in the same manufacturing process. In the example shown in FIGS. 21 and 22, the dummy electrode 62 is not electrically connected to any part of the display unit 61 and is in a floating state.

  As shown in FIG. 11, the polarization difference of the liquid crystal in the positive and negative frames described in the comparative example of the first embodiment described above can be obtained by reducing the electrode spacing S between pixels (increasing the line-space ratio). ) Smaller. In the display unit 61 according to the present embodiment, the dummy electrode 62 is arranged on the outer side of the outermost strip-like portion of the pixel electrode 14 with the same distance as the interval S2 of the strip-like portion in the pixel electrode 14. Equivalently, the electrode spacing S between the pixels is reduced to reduce the polarization difference. Specifically, when the dummy electrode 62 is not provided as in the display unit 6R (FIG. 8) according to the comparative example, the polarization difference is large as in B1 in FIG. When the dummy electrode 62 is provided at a distance S2 from the outermost band-like portion of the pixel electrode 14 as in the display unit 61 (FIG. 21), the polarization difference can be reduced as in B2. This means that the provision of the dummy electrode 62 reduces the flexoelectric effect itself. Thus, in the display unit 61, the flexoelectric effect itself is reduced, and the polarization difference of the liquid crystal in the positive and negative frames is reduced, so that the difference in light transmittance in the positive and negative frames is also reduced. As a result, flicker Can be reduced, and high image quality can be realized.

  Further, in the display unit 61, by arranging the dummy electrode 62 to reduce the flexoelectric effect itself, the burn-in caused by the flexoelectric effect described in the first embodiment is also generated. And can achieve high image quality.

  As described above, in the present embodiment, since the dummy electrode is arranged on the outer side of the outermost strip portion of the pixel electrode at the same distance as the interval of the strip portion within the pixel electrode, the flexoelectric effect itself Therefore, it is possible to realize high image quality without lowering the aperture ratio as compared with the case of providing the light shielding body in the first embodiment or the like.

  In this embodiment, since the dummy electrode is formed using the same material in the same layer as the pixel electrode, the structure is simplified and it is not necessary to add a manufacturing process for forming the dummy electrode. The increase in manufacturing cost can be suppressed.

[Modification 5-1]
In the above embodiment, the dummy electrode is not electrically connected to any part of the display unit. However, the present invention is not limited to this. For example, the dummy electrode may be connected to another part of the display unit. And may be electrically connected.

  FIG. 23 illustrates a configuration example of the display unit 61B in which the dummy electrode is electrically connected to the common electrode. FIG. 24 is a schematic cross-sectional view of the display unit 61B illustrated in FIG. 23 in the direction of arrows XXIV-XXIV. It represents the structure. The dummy electrode 62 is electrically connected to the common electrode 13 formed over the entire surface below the pixel electrode 14 via the contact CONT2. As a result, the common signal Vcom is supplied to the dummy electrode 62 via the common electrode 13 and the contact CONT2 by the common signal driver 3. As described above, in the display unit 61B, since the common signal Vcom is applied to the dummy electrode 62, the potential of the dummy electrode 62 becomes known instead of the floating state as in FIGS. The surrounding electric field can be taken into consideration in the design stage, and more accurate design is possible, such as further reducing the flexoelectric effect.

  In FIG. 23, the dummy electrode 62 is connected to the common electrode 13 using one contact CONT2. However, the present invention is not limited to this. For example, the dummy electrode 62 is connected using a plurality of contacts. May be.

[Other variations]
In the above embodiment, the interval between the outermost band-like portion of the pixel electrode 14 and the dummy electrode 62 is equal to the interval between the plurality of band-like portions in the pixel electrode 14, but the present invention is not limited to this. Instead, it may be slightly different from the interval between these band-like portions. Accordingly, in FIG. 11, it slightly deviates from B2, but even in this case, the polarization difference can be made sufficiently lower than B1 (when no dummy electrode is provided).

  In the above embodiment, the dummy electrode 62 is formed using the same material as that of the pixel electrode 14. However, the present invention is not limited to this. For example, a material different from that of the pixel electrode 14 is used. It may be formed.

  In the above embodiment, the dummy electrodes are provided between the pixel electrodes of the adjacent pixels for all the pixels (red, blue, green). However, the present invention is not limited to this. Thus, for example, a dummy electrode may be provided only between a green pixel and an adjacent pixel. Since the green pixel has a higher transmittance than the red and blue pixels, the influence of the flexoelectric effect on the image quality is large. Therefore, by providing the dummy electrode only around the green pixel, it is possible to effectively improve the image quality using the minimum number of dummy electrodes.

<6. Sixth Embodiment>
Next, a liquid crystal display device according to a sixth embodiment will be described. In this embodiment, the interval between pixel electrodes of adjacent pixels is narrowed. That is, in the fifth embodiment (FIG. 21), dummy electrodes are provided between the pixel electrodes of adjacent pixels so that the distance between the pixel electrodes is equivalently reduced. In this embodiment, the interval between pixel electrodes of adjacent pixels is narrowed. Other configurations are the same as those of the fifth embodiment (FIG. 21). Note that components that are substantially the same as those of the liquid crystal display device according to the fifth embodiment are denoted by the same reference numerals, and description thereof is omitted as appropriate.

  FIG. 25 illustrates a configuration example of the display unit 64 according to the present embodiment, and FIG. 26 illustrates a schematic cross-sectional structure of the display unit 64 illustrated in FIG. 25 in the XXVI-XXVI arrow direction. . In the display unit 64, the interval between the pixel electrodes 14 of the pixels adjacent to each other is set to be the same as the interval S <b> 2 between the plurality of strip portions in the pixel electrode 14.

  In the display unit 64, by narrowing the interval between the pixel electrodes 14 of adjacent pixels, the electrode interval S between the pixels is reduced, so that the polarization difference of the liquid crystal in the positive and negative frames is reduced. As a result, similarly to the fifth embodiment, the light transmittance difference between the positive and negative frames is reduced, and as a result, flicker can be reduced and high image quality can be realized. Further, in the display unit 64, as in the fifth embodiment, it is possible to suppress the occurrence of image sticking caused by the flexoelectric effect and to realize high image quality.

  As described above, in the present embodiment, since the interval between the pixel electrodes 14 of adjacent pixels is narrowed, the flexoelectric effect itself can be reduced, and the light shielding body of the first embodiment or the like is provided. High image quality can be achieved without lowering the aperture ratio.

  Moreover, in this Embodiment, since the additional member for reducing a flexoelectric effect is not required at all, while a structure becomes simple, the increase in manufacturing cost can be suppressed.

[Modification 6-1]
In the above embodiment, as shown in FIG. 25, the pixel electrode 14 is arranged at a position where the gap between the pixel electrodes 14 of adjacent pixels is shifted from the pixel signal line SGL. For example, as shown in FIGS. 27 and 28, the gap may be arranged so as to overlap the pixel signal line SGL. Thus, even when an error occurs in the liquid crystal transmittance of this portion due to the electric field formed by the pixel signal Vpix applied to each pixel electrode 14 in the gap between the adjacent pixel electrodes 14, the pixel signal Since the line SGL functions as a light shield, the influence on the image quality can be minimized.

[Other variations]
In the above embodiment, the interval between the pixel electrodes 14 of adjacent pixels is equal to the interval between the plurality of strip-like portions in the pixel electrode 14, but the present invention is not limited to this. It may be slightly different. Thus, in FIG. 11, it slightly deviates from B2, but even in this case, the polarization difference can be made sufficiently lower than B1 (when the interval between the pixel electrodes 14 of adjacent pixels is wide).

  In the above embodiment, the interval between the pixel electrodes of adjacent pixels is narrowed for all the pixels (red, blue, green). However, the present invention is not limited to this, and instead, for example, The spacing between the pixel electrodes may be narrowed only between the green pixel and the adjacent pixel. Since the green pixel has a higher transmittance than the red and blue pixels, the influence of the flexoelectric effect on the image quality is large. Therefore, the image quality can be effectively improved by narrowing the interval between the pixel electrodes only around the periphery of the green pixel.

<7. Application example>
Next, with reference to FIGS. 29 to 33, application examples of the liquid crystal display device described in the above embodiment and modifications will be described. The liquid crystal display device of the above embodiment can be applied to electronic devices in various fields such as a television device, a digital camera, a notebook personal computer, a mobile terminal device such as a mobile phone, or a video camera. In other words, the liquid crystal display device according to the above-described embodiment or the like can be applied to electronic devices in various fields that display an externally input video signal or an internally generated video signal as an image or video.

(Application example 1)
FIG. 29 illustrates an appearance of a television device to which the liquid crystal display device of the above-described embodiment or the like is applied. This television apparatus has, for example, a video display screen unit 510 including a front panel 511 and a filter glass 512, and the video display screen unit 510 is configured by the liquid crystal display device according to the above-described embodiment and the like. Yes.

(Application example 2)
FIG. 30 illustrates an appearance of a digital camera to which the liquid crystal display device according to the above-described embodiment or the like is applied. This digital camera includes, for example, a flash light emitting unit 521, a display unit 522, a menu switch 523, and a shutter button 524, and the display unit 522 is configured by the liquid crystal display device according to the above-described embodiment and the like. ing.

(Application example 3)
FIG. 31 illustrates an appearance of a notebook personal computer to which the liquid crystal display device of the above-described embodiment or the like is applied. This notebook personal computer has, for example, a main body 531, a keyboard 532 for inputting characters and the like, and a display unit 533 for displaying an image. The display unit 533 is a liquid crystal according to the above-described embodiment and the like. It is comprised by the display apparatus.

(Application example 4)
FIG. 32 shows an appearance of a video camera to which the liquid crystal display device of the above-described embodiment or the like is applied. This video camera has, for example, a main body 541, a subject shooting lens 542 provided on the front side surface of the main body 541, a start / stop switch 543 at the time of shooting, and a display 544. The display unit 544 is configured by the liquid crystal display device according to the above embodiment and the like.

(Application example 5)
FIG. 33 illustrates an appearance of a mobile phone to which the liquid crystal display device of the above-described embodiment or the like is applied. For example, the mobile phone is obtained by connecting an upper housing 710 and a lower housing 720 with a connecting portion (hinge portion) 730, and includes a display 740, a sub-display 750, a picture light 760, and a camera 770. Yes. The display 740 or the sub-display 750 is configured by the liquid crystal display device according to the above-described embodiment or the like.

  The present invention has been described above with reference to some embodiments and modifications, and application examples to electronic devices. However, the present invention is not limited to these embodiments and the like, and various modifications are possible. is there.

  For example, in each of the embodiments described above, the liquid crystal display device performs frame inversion driving. However, the present invention is not limited to this. For example, the potential difference between the voltage of the pixel electrode and the voltage of the common electrode for each line. Line inversion driving for inverting the polarity of the potential difference may be performed, or dot inversion driving for inverting the polarity of the potential difference for each dot may be performed.

  Further, for example, in each of the first to fourth embodiments, the light shielding body is provided for all the pixels (red, blue, and green). However, the present invention is not limited to this. Instead, for example, a light shield may be provided only for green pixels. Since the green pixel has a higher transmittance than the red and blue pixels, the influence of the flexoelectric effect on the image quality is large. Therefore, by providing the light shielding body only for the green pixels, a decrease in the aperture ratio due to the introduction of the light shielding body can be suppressed to the minimum, and the image quality can be effectively improved.

  Further, for example, in each of the first to fourth embodiments, the light shielding body is formed in the layer of the scanning signal line GCL, the pixel signal line SGL, and the color filter 22, but the present invention is not limited to this. A light shield may be formed on this layer, or a dedicated layer for the light shield may be newly formed. Even in this case, by providing the light shielding body, flicker and image sticking can be reduced, and high image quality can be realized.

  Further, for example, in each of the first to fourth embodiments, the light shielding body is provided in the FFS display unit. However, the present invention is not limited to this. For example, the light shielding body is provided in the IPS display unit. Also good. Even in this case, by providing the light shielding body, flicker and image sticking can be reduced, and high image quality can be realized.

DESCRIPTION OF SYMBOLS 1 ... Liquid crystal display device, 2 ... Display control part, 3 ... Common signal driver, 4 ... Gate driver, 5 ... Source driver, 6, 51, 54, 57, 61, 61B, 64, 64B ... Display part, 9 ... Liquid crystal Layer 10, array substrate 11, TFT substrate 121 to 124 insulating film 13 common electrode 14 pixel electrode 15, 23 alignment film 20 color filter substrate 21 counter substrate 22 color Filter, 24 ... Polarizing plate, 31 ... Gate electrode, 32 ... Source electrode, 33 ... Drain electrode, 39, 52, 58, 58B ... Light shield, 40 ... Semiconductor layer, 41 ... Channel layer, 42 ... Source region, 43 ... Drain region, 44, 45 ... LDD region, 62 ... dummy electrode, 91 ... liquid crystal molecule, CONT, CONT2 ... contact, GCL ... scanning signal line, L ... electrode width, LC ... liquid crystal element, Pix ... image , S ... Interval, SGL, SGL2 ... pixel signal line, Tr ... transistors, Vcom ... common signal, Vpix ... pixel signals, Vscan ... scanning signal, Vsig ... video signal

Claims (11)

A first substrate formed by sequentially forming a common electrode, an insulating film, and a plurality of pixel electrodes on a substrate;
A second substrate spaced apart from the surface of the first substrate on which the pixel electrodes are formed;
A liquid crystal layer disposed between the first and second substrates;
A light shielding body that partially shields light transmitted through the liquid crystal layer,
The pixel electrode has a plurality of band-like portions arranged in parallel at intervals,
The liquid crystal display device, wherein the light shielding body is provided at a position corresponding to at least a part of an outermost band-like portion in the pixel electrode. The liquid crystal display device according to claim 1, wherein the light shield is provided at a position corresponding to at least a central portion in the width direction of the outermost strip-shaped portion. The liquid crystal display device according to claim 1, wherein the light shielding body is also provided at a position corresponding to a region between the pixel electrodes in a direction orthogonal to a longitudinal direction of the belt-like portion. A plurality of first wires extending in the longitudinal direction of the belt-shaped portion;
The liquid crystal display device according to claim 3, wherein the first wiring is also used as the light blocking body. And a plurality of second wires extending in a direction perpendicular to the longitudinal direction of the belt-shaped portion,
The liquid crystal display device according to claim 3, wherein the light blocking body is formed of the same material in the same layer as the second wiring. The liquid crystal display device according to claim 5, wherein the light shield is electrically insulated from the surroundings. The liquid crystal display device according to claim 3, wherein the light blocking body is provided on the second substrate. The second substrate has a color filter layer;
The liquid crystal display device according to claim 7, wherein the light blocking body is provided as a black matrix on the color filter layer. A plurality of first wires extending in the longitudinal direction of the belt-shaped portion;
A plurality of second wirings extending in a direction orthogonal to the longitudinal direction of the strip-shaped portion,
The liquid crystal display device according to claim 3, wherein the light shielding body is provided on the first substrate as a separate body from the first wiring and in a different layer from the second wiring. The second substrate is
A color filter layer having a red color filter that transmits only red, a green color filter that transmits only green, and a blue color filter that transmits only blue;
The liquid crystal display device according to claim 3, wherein the light blocking body is provided at a position corresponding to at least both the pixel electrode corresponding to the green color filter and the inter-pixel electrode region adjacent thereto. A liquid crystal display device;
A processing unit that performs a predetermined process related to a display operation of the liquid crystal display device,
The liquid crystal display device
A first substrate formed by sequentially forming a common electrode, an insulating film, and a plurality of pixel electrodes on a substrate;
A second substrate spaced apart from the surface of the first substrate on which the pixel electrodes are formed;
A liquid crystal layer disposed between the first and second substrates;
A light shielding body that partially shields light transmitted through the liquid crystal layer,
The pixel electrode has a plurality of band-like portions arranged in parallel at intervals,
The said light shielding body is provided in the position corresponding to at least one part of the outermost strip | belt-shaped part in the said pixel electrode.

Images