JP2010096796A - Liquid crystal display device and electronic apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a liquid crystal display device wherein improvement (enhancement) of luminance and improvement of driving voltage (low driving voltage) are made attainable and to provide an electronic apparatus. <P>SOLUTION: In the liquid crystal display device 2 which includes: first and second substrates AR and CF with a liquid crystal layer LC interposed therebetween; a first electrode 10 formed on the liquid crystal layer LC side of the first substrate AR; and a second electrode 48 formed on the liquid crystal layer LC side of the first electrode 10 through an insulating film 42 and having a plurality of linear portions 48a formed in a region two-dimensionally superposed on the first electrode 10 and constitutes a plurality of sub pixel regions. A third electrode 60 having a plurality of linear portions 60a is formed on the liquid crystal layer LC side of the second substrate CF, each of the linear portions 60a of the third electrode 60 has a portion which is not two-dimensionally superposed on each of the linear portions 48a of the second electrodes 48 and is formed along each of the linear portions 48a of the second electrode 48 and the second electrode 48 generates respective electric fields between the third electrode 60 and the second electrode 48 and between the first electrode 10 and the second electrode 48. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a liquid crystal display device and an electronic apparatus.

  As a liquid crystal display device, a vertical electric field type such as a TN (Twisted Nematic) mode, a VA (Vertical Alignment) mode, and an MVA (Multi-domain Vertical Alignment) mode is often used, but an electrode is provided only on one substrate. There is also known a horizontal electric field type liquid crystal display device provided with a liquid crystal display device of the horizontal electric field type, and an operation principle of an FFS mode liquid crystal display device will be described with reference to FIGS. 10 and 11 (for example, Patent Document 1).

  FIG. 10 is a schematic plan view of one pixel that is seen through the color filter substrate CF of the conventional FFS mode liquid crystal display device 190. 11 is a cross-sectional view taken along line XI-XI ′ of FIG.

  The FFS mode liquid crystal display device 190 includes an array substrate AR and a color filter substrate CF. In the array substrate AR, a plurality of scanning lines 194 and common wirings 196 are provided in parallel on the surface of the first transparent substrate 192, and a plurality of signal lines 198 are provided in a direction intersecting the scanning lines 194 and common wirings 196. ing. The counter is formed of a transparent material made of ITO (Indium Tin Oxide), IZO (Indium Zinc Oxide), or the like connected to the common wiring 196 so as to cover each of the regions partitioned by the scanning lines 194 and the signal lines 198. An electrode (also referred to as “common electrode”) 200 is provided. A pixel electrode 206 made of a transparent material such as ITO and having a plurality of slits 204 formed in a stripe shape is provided on the surface of the counter electrode 200 via an insulating film 202. The surfaces of the pixel electrode 206 and the plurality of slits 204 are covered with an alignment film 208.

  A TFT as a switching element is formed in the vicinity of the intersection position between the scanning line 194 and the signal line 198. In this TFT, the semiconductor layer 210 is disposed on the surface of the scanning line 194, a part of the signal line 198 is extended so as to cover a part of the surface of the semiconductor layer 210, and the source layer S is formed. The lower scanning line portion constitutes the gate electrode G, and the conductive layer overlapping with a part of the semiconductor layer 210 constitutes the drain electrode D. The drain electrode D is connected to the pixel electrode 206.

  The color filter substrate CF has a configuration in which a color filter layer 214, an overcoat layer 216, and an alignment film 218 are provided on the surface of the second transparent substrate 212. Then, the array substrate AR and the color filter substrate CF are opposed so that the pixel electrode 206 and the counter electrode 200 of the array substrate AR and the color filter layer 214 of the color filter substrate CF are opposed to each other. Next, the liquid crystal LC is sealed between the array substrate AR and the color filter substrate CF, and the polarizing plates 220 and 222 are disposed on the outer sides of the two substrates so that the polarization directions thereof are orthogonal to each other. A mode liquid crystal display device 190 is formed.

  In the FFS mode liquid crystal display device 190, when an electric field is generated between the pixel electrode 206 and the counter electrode 200, the electric field is directed to the counter electrode 200 on both sides of the pixel electrode 206 as shown in FIG. Therefore, not only the liquid crystal present in the slit 204 but also the liquid crystal present on the pixel electrode 206 can move.

JP 2001-56476 A

  However, in the FFS mode liquid crystal display device 190, the liquid crystal molecules between and on the electrodes are not easily twisted due to the strength of the electric field strength, which causes a decrease in display brightness.

  SUMMARY An advantage of some aspects of the invention is to solve at least a part of the problems described above, and the invention can be implemented as the following forms or application examples.

  Application Example 1 First and second substrates sandwiching a liquid crystal layer, a first electrode formed on the liquid crystal layer side of the first substrate, and an insulating film on the liquid crystal layer side from the first electrode And a second electrode having a plurality of linear portions in a region overlapping with the first electrode in a plane, and forming a plurality of subpixel regions, wherein the second substrate A third electrode having a plurality of linear portions is formed on the liquid crystal layer side, and each linear portion of the third electrode does not planarly overlap with each linear portion of the second electrode. And a portion formed along each linear portion of the second electrode, and the second electrode generates an electric field between the third electrode and the first electrode, respectively. A liquid crystal display device characterized by the above.

  According to this, each linear part of the first electrode and the second electrode is formed via the insulating film, and corresponds to the pixel electrode and the counter electrode of the FFS mode liquid crystal display device.

  Each linear portion of the second electrode is formed so as not to overlap with each linear portion of the third electrode in a plan view, and an electric field is generated between the second electrode and the third electrode. Let Therefore, liquid crystal molecules can be moved by the electric field between each linear portion of the second electrode and each linear portion of the third electrode in addition to the lateral electric field between the linear portions of the first electrode and the second electrode. It is possible to display brightly without increasing the drive voltage. As a result, the transmittance can be improved without reducing the distance between the linear portions of the second electrode on the first substrate side. In addition, the drive voltage can be lowered depending on the electrode configuration (interelectrode width and counter electrode width) and the electrode position. In this manner, a liquid crystal display device capable of improving (improving) brightness and improving driving voltage (low driving voltage) is provided.

  Application Example 2 In the above liquid crystal display device, the third electrode is formed of a transparent conductive material.

  According to this, since the third electrode is formed of a transparent conductive material, the light from the backlight is not shielded by the third electrode in particular, so that a bright display liquid crystal display device can be obtained. The second electrode can be formed of a metal material like a conventional FFS mode liquid crystal display device, but it is preferable to use a transparent conductive material from the viewpoint of increasing luminance. As the transparent conductive material, a known material such as ITO or IZO can be used.

  Application Example 3 In the above liquid crystal display device, the potential of the third electrode is the potential of the second electrode, the intermediate potential between the voltage of the first electrode and the voltage of the second electrode, or the fixed potential. Or a liquid crystal display device characterized by being at least one in a floating state in terms of potential.

  According to this, by setting the potential of the third electrode to a specified potential, it is possible to prevent each linear portion of the third electrode from disturbing the alignment of the liquid crystal.

  Application Example 4 In the liquid crystal display device, each linear portion of the third electrode has a longitudinal direction along a scanning line or a signal line formed on the first substrate. Liquid crystal display device.

According to this, since the third electrode can be effectively formed even in the vicinity of the switching element, the aperture ratio can be increased without waste.
Application Example 5 In the liquid crystal display device, the interval between the linear portions of the third electrode is different in at least one sub-pixel region.

  According to this, since the tolerance with respect to the set deviation at the time of assembling the first and second substrates is increased, it is possible to reduce a decrease in transmittance due to the set deviation.

  Application Example 6 Electronic equipment in which the liquid crystal display device according to any one of the above is mounted on a display portion.

  According to this, by providing the liquid crystal display device in the display unit, high-quality display can be performed on the display unit.

  Hereinafter, an embodiment of a liquid crystal display device will be described with reference to the drawings. In the drawings referred to in each embodiment, each layer and each member are displayed in different scales so that each layer and each member have a size that can be recognized on the drawing.

(First embodiment)
FIG. 1 is a circuit configuration diagram of a plurality of sub-pixel regions formed in a matrix that constitutes the liquid crystal display device 2 according to the present embodiment.

  In the image display area of the liquid crystal display device 2 according to the present embodiment, a plurality of sub-pixel areas are arranged in a matrix. In each subpixel region, a first electrode 10 and a TFT 12 for controlling the switching of the first electrode 10 are formed. A signal line 16 extending from the signal line driving circuit 14 is electrically connected to the source of the TFT 12. The signal line driving circuit 14 supplies image signals S1, S2,..., Sn to the respective pixels via the signal line 16. The image signals S1 to Sn may be supplied line-sequentially in this order, or may be supplied for each of a plurality of signal lines 16 adjacent to each other.

  A scanning line 20 extending from the scanning line driving circuit 18 is electrically connected to the gate of the TFT 12. The scanning line driving circuit 18 supplies scanning signals G1, G2,..., Gm to the scanning line 20 in a pulse manner at a predetermined timing. The scanning signals G1 to Gm are applied to the gate of the TFT 12 in line order in this order. On the other hand, the first electrode 10 is electrically connected to the drain of the TFT 12. Then, when the scanning signals G1, G2,..., Gm are input and the TFT 12 as a switching element is turned on for a certain period, the image signals S1, S2,. At this timing, data is written to the first electrode 10.

  Image signals S1, S2,..., Sn written to the liquid crystal through the first electrode 10 are held for a certain period by a liquid crystal capacitor formed between the first electrode 10 and the common electrode. Here, in order to prevent the held image signal from leaking, the storage capacitor 22 is formed in parallel with the liquid crystal capacitor. The storage capacitor 22 is provided between the drain of the TFT 12 and the capacitor line 24.

Next, the plane and cross-sectional configuration of the liquid crystal display device 2 will be described with reference to FIGS.
FIG. 2 is a plan view of an arbitrary sub-pixel represented by seeing through the color filter substrate CF of the liquid crystal display device 2 according to the present embodiment. 3 is a partial cross-sectional configuration diagram taken along the line III-III ′ in FIG. 2, and FIG. 4 is a partial cross-sectional configuration diagram along the line IV-IV ′ in FIG. 2.

  In the sub-pixel region of the liquid crystal display device 2 according to the present embodiment, a color filter layer 26 having substantially the same planar shape as the sub-pixel region is provided. Further, a columnar spacer 28 for keeping the liquid crystal layer thickness (cell gap) constant by separating the array substrate AR and the color filter substrate CF at a predetermined interval is provided at the lower right corner of the sub-pixel region. It is installed.

  The liquid crystal display device 2 includes an array substrate (first substrate) AR and a color filter substrate (second substrate) CF. The array substrate AR crosses the surface of the display region of the first transparent substrate 30 such as a glass substrate in a state where a plurality of scanning lines 20 and signal lines 16 are insulated from each other by a gate insulating film 32 in a matrix. In addition, a common wiring 34 is formed on the peripheral edge of the display area. Each region surrounded by the scanning line 20 and the signal line 16 forms each pixel (also referred to as “sub-pixel”). In addition, on the first transparent substrate 30, for example, a TFT 12 is formed as a switching element for each pixel. In the TFT 12, a semiconductor layer 36 is disposed on the surface of the scanning line 20, and a part of the signal line 16 is extended so as to cover a part of the surface of the semiconductor layer 36 to constitute a source electrode S. The scanning line portion below the gate electrode G constitutes a gate electrode G, and the conductive layer overlapping a part of the semiconductor layer 36 constitutes a drain electrode D. The drain electrode D is connected to the first electrode 10. . The entire surface of the first transparent substrate 30 including the TFT 12 is covered with a passivation film 38 made of, for example, a silicon nitride layer or a silicon oxide layer.

  A planarizing film 40 made of an organic material is formed on the surface of the passivation film 38, and the first electrode 10 is formed on the surface of the planarizing film 40. The first electrode 10 has a rectangular shape in plan view, and has a longitudinal direction in the Y-axis direction (signal line 16 / extending direction of a wiring for supplying a signal). An insulating film 42 made of a silicon nitride layer or a silicon oxide layer is formed on the surfaces of the first electrode 10 and the planarizing film 40 over the entire surface of the first transparent substrate 30. In the insulating film 42, the planarizing film 40, and the passivation film 38, a first contact hole 44 is formed at a position corresponding to the drain electrode D of the TFT 12. A second electrode 48 having a linear portion 48 a extending along the signal line 16 in each pixel is formed on the surface of the insulating film 42. The second electrode 48 includes a plurality of linear portions 48a and has a longitudinal direction in the Y-axis direction. The first electrode 10 and the second electrode 48 are preferably formed of a transparent conductive material such as ITO or IZO in order to increase the aperture ratio so that a bright display can be achieved. It can also be formed.

  The first electrode 10 is electrically connected to the drain electrode D of the TFT 12 via the first contact hole 44, and the second electrode 48 is connected to the common wiring 34 via the second contact hole 50 formed in the insulating film 42. Is electrically connected. Therefore, in the liquid crystal display device 2, the first electrode 10 functions as a counter electrode, and the second electrode 48 functions as a pixel electrode.

  Therefore, the pair of the linear portions 48a of the first electrode 10 and the second electrode 48 that overlap with each other through the insulating film 42 has an arrangement relationship of the FFS mode liquid crystal display device. Note that which of the first electrode 10 and the second electrode 48 is to be the pixel electrode is arbitrary. However, the electrode pairs that overlap with each other through the insulating film 42 need to be a pair of a pixel electrode and a counter electrode.

  A first alignment film 52 is formed over the entire display region including the surface of the second electrode 48.

  The color filter substrate CF corresponds to the scanning line 20, the signal line 16, the first contact hole 44, the second contact hole 50, and the TFT 12 of the array substrate AR on the surface of the second transparent substrate 54 such as a glass substrate. A light shielding film 56 is formed so as to cover the position. Further, a color filter layer 26 of a predetermined color is formed on the surface of the second transparent substrate 54 surrounded by the light shielding film 56. An overcoat layer 58 is formed so as to cover the surfaces of the light shielding film 56 and the color filter layer 26.

  A patterned third electrode 60 made of an ITO film is formed on each pixel on the overcoat layer 58. With such a configuration, the third electrode 60 formed on the surface of the overcoat layer 58 is flattened by unevenness due to the presence of, for example, the color filter layer 26, so that the cell gap is made uniform. Therefore, according to the liquid crystal display device 2 of the aspect, a liquid crystal display device having a good display image quality can be obtained. The third electrode 60 has a plurality of linear portions 60a and has a longitudinal direction in the Y-axis direction. Each linear portion 60a of the third electrode 60 is disposed so as not to overlap with each linear portion 48a of the second electrode 48 in plan view. Each linear portion 60a of the third electrode 60 is located between each linear portion 48a of the second electrode 48 in plan view. The third electrode 60 is provided with slits so as to overlap each linear portion 48 a of the second electrode 48 in a planar manner. With such a configuration, the third electrode 60 can be effectively formed in the vicinity of the TFT 12 and the like, so that the aperture ratio can be increased without waste. The third electrode 60 is formed across a plurality of subpixel regions.

  As the potential of the third electrode 60, at least one of the same potential as that of the first electrode 10, an intermediate potential between the first electrode 10 and the second electrode 48, a fixed potential, a floating state, and the like is given. With such a configuration, by setting the potential of the third electrode 60 to a predetermined potential, it is possible to prevent each linear portion 60a of the third electrode 60 from disturbing the alignment of the liquid crystal LC. Further, a pulsed potential may be applied to the third electrode 60. With such a configuration, high-speed response can be achieved.

  The third electrode 60 may be applied with a predetermined potential in addition to a floating state in terms of potential. In applying a predetermined potential to the third electrode 60, the third electrode 60 formed on the liquid crystal LC side of the color filter substrate CF and the wiring (not shown) formed on the array substrate AR are electrically connected. On the other hand, when the third electrode 60 is in a floating state, the conduction between the substrates is omitted. The third electrode 60 is preferably formed of a transparent conductive material such as ITO or IZO in order to increase the aperture ratio and enable bright display, but is formed of a metal material such as aluminum. You can also.

  A second alignment film 64 is formed on the surfaces of the overcoat layer 58 and the third electrode 60.

  The array substrate AR and the color filter substrate CF are opposed so that the linear portions 48a of the second electrode 48 of the array substrate AR and the linear portions 60a of the third electrode 60 of the color filter substrate CF do not overlap each other. In the meantime, liquid crystal LC is sealed. As a material for the liquid crystal LC, either a liquid crystal material having a negative dielectric anisotropy or a positive liquid crystal material may be used, but a liquid crystal material having a negative dielectric anisotropy is preferably used. This is because when a liquid crystal material having a negative dielectric anisotropy is used, the viewing angle when a selection voltage is applied (voltage on) can be widened so that the display characteristics of the display device are not impaired. Further, by using a liquid crystal having a negative dielectric anisotropy of the liquid crystal, it is possible to reduce the influence of the vertical electric field due to the misalignment, and to improve the tolerance for the misalignment.

  Then, the first polarizing plate 66 and the backlight device (not shown) are arranged outside the array substrate AR, and the second polarizing plate 68 is arranged outside the color filter substrate CF to complete the liquid crystal display device 2. A retardation plate may be disposed between the substrates AR and CF and the polarizing plates 66 and 68 as necessary.

Next, the operation of the liquid crystal display device 2 will be described.
In the liquid crystal display device 2, the first electrode 10 and the third electrode 60 function as counter electrodes, and the second electrode 48 operates as a pixel electrode. The linear portions 48 a of the second electrode 48 and the linear portions 60 a of the third electrode 60 do not overlap with each other through the first alignment film 52, the liquid crystal LC, and the second alignment film 64 in plan view. Therefore, when the liquid crystal display device 2 is activated, an electric field E1 is generated between the first electrode 10 and each linear portion 48a of the second electrode 48, as shown in FIG. An electric field E <b> 2 is applied between each linear portion 48 a and each linear portion 60 a of the third electrode 60.

  The liquid crystal molecules can be moved by the electric field E <b> 2 applied between each linear portion 48 a of the second electrode 48 and each linear portion 60 a of the third electrode 60. The operation by the electric field E1 applied between the linear portions 48a of the first electrode 10 and the second electrode 48 is the same as in the conventional FFS mode liquid crystal display device 190 shown in FIGS. It is the same. Accordingly, the liquid crystal display device 2 operates as an FFS mode liquid crystal display device between the linear portions 48 a of the first electrode 10 and the second electrode 48.

(Transparency vs. drive voltage characteristics)
FIG. 5 is a graph of transmittance T-driving voltage V characteristics between the liquid crystal display device 2 according to the present embodiment and a conventional FFS structure liquid crystal display device. The graph L1 is the transmittance T-drive voltage V characteristic of the liquid crystal display device 2, and the graph L2 is the transmittance T-drive voltage V characteristic of the conventional FFS mode liquid crystal display device.

  When the graphs L1 and L2 of the transmittance T-driving voltage V characteristics are compared, the light transmittance when the selection voltage Vs is applied is higher in the liquid crystal display device 2 than in the conventional FFS mode liquid crystal display device. ing.

  According to the present embodiment, in addition to the transverse electric field E1 between the first electrode 10 and each linear portion 48a of the second electrode 48, each linear portion 48a of the second electrode 48 and each linear portion 60a of the third electrode 60. The liquid crystal molecules can be moved by the electric field E2 between them and bright display can be achieved without increasing the drive voltage. As a result, the transmittance can be improved without reducing the distance between the linear portions 48a of the second electrode 48 on the array substrate AR side. In addition, the drive voltage can be lowered depending on the electrode configuration (interelectrode width and counter electrode width) and the electrode position. In this way, the liquid crystal display device 2 that can improve (improve) the brightness and improve the driving voltage (low driving voltage) is provided.

(Second Embodiment)
Next, the liquid crystal display device 4 according to the second embodiment will be described with reference to FIG.
FIG. 6 is a plan view of an arbitrary sub-pixel represented by seeing through the color filter substrate CF of the liquid crystal display device 4 according to the present embodiment. In FIG. 6, the same components as those of the liquid crystal display device 2 of the first embodiment shown in FIG. 2 are denoted by the same reference numerals, and detailed description thereof is omitted. 6 are the same as FIGS. 3 and 4, respectively, and the illustration and detailed description thereof are omitted.

  The configuration of the liquid crystal display device 4 according to the present embodiment is different from that of the liquid crystal display device 2 of the first embodiment. In the liquid crystal display device 2 of the first embodiment, each linear portion 48a of the second electrode 48 is different. Although each extends straight along the signal line 16, in the liquid crystal display device 4 of the present embodiment, the center of each linear portion 48 a of the second electrode 48 is formed to be bent. Further, the linear portions 60a of the third electrode 60 arranged so as not to overlap the linear portions 48a of the second electrode 48 in plan view are also formed so that the center is bent.

  In the liquid crystal display device 4, each linear portion 48 a of the second electrode 48 and each linear portion 60 a of the third electrode 60 are so-called “dual domain” in which they are arranged in a “character shape” with the center of the pixel as a boundary. The rotation direction of the liquid crystal molecules is the rotation direction of the liquid crystal molecules in the upper half area when viewed from the front side of the paper with the center of the pixel as the boundary, and the rotation direction of the liquid crystal molecules in the lower half area when viewed from the front side of the paper. The directions of rotation are opposite to each other.

  According to the present embodiment, by providing a dual-domain electrode structure, it is possible to suppress a color shift such as yellow or blue depending on the viewing angle.

(Third embodiment)
Next, a liquid crystal display device 6 according to a third embodiment will be described with reference to FIGS.
FIG. 7 is a cross-sectional view of the liquid crystal display device 4 according to the present embodiment, and FIG. 8 is an explanatory diagram of each linear portion 60a of the third electrode 60 according to the present embodiment. In FIG. 7, the same components as those of the liquid crystal display device 2 of the first embodiment shown in FIG. 3 are denoted by the same reference numerals, and detailed description thereof is omitted.

  The liquid crystal display device 6 according to the present embodiment is different in configuration from the liquid crystal display device 2 of the first embodiment. In the liquid crystal display device 2 of the first embodiment, each linear portion 60a of the third electrode 60 is different. In the liquid crystal display device 6 of the present embodiment, in addition to the linear portions 48a of the second electrode 48, the interval between the linear portions 60a of the third electrode 60 is 1. This is a point formed differently within the pixel.

  In the liquid crystal display device 6, the interval between the linear portions 60 a of the third electrode 60 is different at least within one pixel. The interval between the linear portions 60a of the third electrode 60 may be arbitrarily shifted within one pixel. For example, as shown in FIG. 7, the relationship between the spacing S1 and the spacing S2 between the linear portions 60a of the third electrode 60 is spacing S1> spacing S2. Specifically, as shown in FIG. 8, the left linear portion 60a with respect to the central linear portion 60a as viewed from the front side of the page, compared to the aerial linear portions 60b arranged at the same interval S3, The relationship S1> Spacing S3, and the right-side linear portion 60a has the relationship S2> S3.

  According to the present embodiment, the tolerance for the set deviation when assembling the array substrate AR and the color filter substrate CF is increased, so that a decrease in transmittance due to the set deviation can be reduced. In addition, in each linear part 60a of the 3rd electrode 60, in order to minimize the influence of an assembly shift, you may select the electrode which gives an electric potential by an assembly shift.

(Electronics)
Next, an electronic device including the above-described liquid crystal display device will be described.
FIG. 9 is a perspective view of a mobile phone 100 that is an example of an electronic apparatus in which the liquid crystal display device according to the present embodiment is mounted on a display unit.

  A cellular phone 100 according to the present embodiment includes the liquid crystal display device of the above-described embodiment as a small-sized display unit 102, and includes a plurality of operation buttons 104, an earpiece 106, and a mouthpiece 108. Since the mobile phone 100 includes the liquid crystal display device of the above-described embodiment, it is possible to provide an electronic device with excellent display quality.

  The liquid crystal display device of the above embodiment is not limited to the mobile phone, but is an electronic book, personal computer, digital still camera, liquid crystal television, viewfinder type or monitor direct view type video tape recorder, car navigation device, pager, electronic It can be suitably used as image display means for devices such as notebooks, calculators, word processors, workstations, videophones, POS terminals, touch panels, etc., and any electronic device can provide electronic devices with excellent display quality. .

  The embodiment has been described above. As a modification, for example, the following can be considered.

(Modification 1)
In the liquid crystal display device of the above embodiment, the example in which each linear portion 60a of the third electrode 60 has the longitudinal direction along the signal line 16 has been shown. There is an effect.

(Modification 2)
Although the liquid crystal display device of the said embodiment showed the example which does not have the shield electrode normally used on the color filter substrate side, you may have a shield electrode on the color filter substrate side. For example, in a normal horizontal electric field type liquid crystal display device, since there is no conductor on the color filter substrate side, it is necessary to provide a shield electrode as a countermeasure against static electricity. Therefore, a shield electrode is unnecessary. Even when a shield electrode for preventing electrostatic charging from being formed on the color filter substrate CF is formed, each linear portion 60a of the patterned third electrode 60 is formed. It is difficult to be charged due to, and even if charged, the alignment of the liquid crystal is not disturbed. Further, since each linear portion 60a of the patterned third electrode 60 is formed on the liquid crystal LC side of the color filter substrate CF, it is possible to form a patterned electrode in the state of the substrate before assembling the liquid crystal panel. it can.

(Modification 3)
The liquid crystal display device of the above embodiment is a transmissive liquid crystal display device, but is not limited to this, and may be, for example, a reflective or transflective liquid crystal display device.

FIG. 3 is a circuit configuration diagram of a plurality of sub-pixel regions formed in a matrix that constitutes the liquid crystal display device according to the first embodiment. FIG. 3 is a plan view of an arbitrary one sub-pixel that is seen through a color filter substrate of the liquid crystal display device according to the first embodiment. FIG. 3 is a partial cross-sectional configuration diagram along line III-III ′ in FIG. 2. FIG. 4 is a partial cross-sectional configuration diagram taken along line IV-IV ′ in FIG. 2. The graph of the TV characteristic of the liquid crystal display device which concerns on 1st Embodiment, and the conventional FFS structure. FIG. 5 is a plan view of an arbitrary sub-pixel that is seen through a color filter substrate of a liquid crystal display device according to a second embodiment. Sectional drawing of the liquid crystal display device which concerns on 3rd Embodiment. Explanatory drawing of each linear part of the 3rd electrode which concerns on 3rd Embodiment. The perspective view of the mobile telephone which is an example of the electronic device which mounted the liquid crystal display device which concerns on this embodiment in the display part. FIG. 10 is a schematic plan view of one pixel that is seen through a color filter substrate of a conventional FFS mode liquid crystal display device. Sectional drawing along the XI-XI 'line | wire of FIG.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 2,4,6 ... Liquid crystal display device 10 ... 1st electrode 12 ... TFT 14 ... Signal line drive circuit 16 ... Signal line 18 ... Scan line drive circuit 20 ... Scan line 22 ... Storage capacitor 24 ... Capacitance line 26 ... Color filter layer DESCRIPTION OF SYMBOLS 28 ... Columnar spacer 30 ... 1st transparent substrate 32 ... Gate insulating film 34 ... Common wiring 36 ... Semiconductor layer 38 ... Passivation film 40 ... Flattening film 42 ... Insulating film 44 ... 1st contact hole 48 ... 2nd electrode 48a ... Line 50: second contact hole 52 ... first alignment film 54 ... second transparent substrate 56 ... light shielding film 58 ... overcoat layer 60 ... third electrode 60a ... linear portion 64 ... second alignment film 66 ... first polarization Plate 68 ... Second polarizing plate 100 ... Mobile phone 102 ... Display unit 104 ... Operation button 106 ... Earpiece 108 ... Mouthpiece

Claims (6)

First and second substrates sandwiching a liquid crystal layer;
A first electrode formed on the liquid crystal layer side of the first substrate;
A second electrode formed on the liquid crystal layer side of the first electrode via an insulating film and having a plurality of linear portions in a region overlapping the first electrode in a plane;
A liquid crystal display device comprising a plurality of sub-pixel regions,
A third electrode having a plurality of linear portions is formed on the liquid crystal layer side of the second substrate, and each linear portion of the third electrode is planar with each linear portion of the second electrode. The second electrode has a portion formed along each linear portion of the second electrode without overlapping, and the second electrode is between the third electrode and the first electrode, respectively. A liquid crystal display device characterized by generating an electric field. The liquid crystal display device according to claim 1.
The liquid crystal display device, wherein the third electrode is made of a transparent conductive material. The liquid crystal display device according to claim 1 or 2,
The potential of the third electrode is at least one of the potential of the second electrode, the intermediate potential between the voltage of the first electrode and the voltage of the second electrode, a fixed potential, or a potential floating state. A liquid crystal display device characterized by the above. The liquid crystal display device according to any one of claims 1 to 3,
Each of the linear portions of the third electrode has a longitudinal direction along a scanning line or a signal line formed on the first substrate. In the liquid crystal display device according to any one of claims 1 to 4,
The liquid crystal display device according to claim 1, wherein an interval between the linear portions of the third electrode is different in at least one of the sub-pixel regions.   An electronic apparatus comprising the liquid crystal display device according to claim 1 mounted on a display unit.

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