JP2010097118A - Liquid crystal display device and electronic apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a liquid crystal display device that prevents first and second substrates from being damaged, even if reducing the thickness of the first and second substrates. <P>SOLUTION: The liquid crystal display device 100 includes: a liquid crystal panel 100a including a TFT substrate 1a; a liquid crystal panel 100b, which is arranged at the TFT substrate 1a side of the liquid crystal panel 100a, and which includes a TFT substrate 1b with substantially the same size as the TFT substrate 1a in a planar view; a polarizing plate 8, which is arranged between the TFT substrate 1a and the TFT substrate 1b; an adhesive layer 9a for laminating the polarizing plate 8 with the TFT substrate 1a; and an adhesive layer 9b for laminating the polarizing plate 8 with the TFT substrate 1b. Also, the polarizing plate 8 is formed in a size of the TFT substrate 1a and the TFT substrate 1b or larger in planar view. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a liquid crystal display device and an electronic device, and more particularly, to a liquid crystal display device and an electronic device in which a first liquid crystal panel and a second liquid crystal panel are overlaid.

  Conventionally, a liquid crystal display device in which a first liquid crystal panel and a second liquid crystal panel are overlaid is known (see, for example, Patent Document 1). In the liquid crystal display device disclosed in Patent Document 1, the first liquid crystal panel and the second liquid crystal panel are overlapped, so that a contrast corresponding to the product of the contrast of the first liquid crystal panel and the contrast of the second liquid crystal panel is obtained. Can be obtained. The first substrate provided on the first liquid crystal panel and on which the thin film transistor is formed is bonded to the surface on one side of the polarizing plate, and is provided on the second liquid crystal panel and the second substrate on which the color filter is formed. Is bonded to the surface of the other side of the polarizing plate. The first substrate of the first liquid crystal panel is formed so as to be larger than the second substrate and the polarizing plate of the second liquid crystal panel in a plan view so as to protrude laterally from the side surface of the second substrate. Yes.

JP 2007-310161 A

  Here, in the liquid crystal display device having a structure in which the first liquid crystal panel and the second liquid crystal panel described in Patent Document 1 are overlapped, in order to reduce the influence of parallax, the first liquid crystal panel and the second liquid crystal panel are used. It is considered that it is necessary to reduce the distance between the liquid crystal layer of the first liquid crystal panel and the liquid crystal layer of the second liquid crystal panel by reducing the thickness of the first substrate and the second substrate located on the interface side. However, if the thicknesses of the first substrate and the second substrate are reduced, it is considered that the first substrate and the second substrate are likely to be damaged due to the force applied to the first substrate and the second substrate.

  The present invention has been made to solve the above-described problems, and one object of the present invention is to provide the first substrate and the second substrate even when the thicknesses of the first substrate and the second substrate are reduced. It is an object of the present invention to provide a liquid crystal display device capable of suppressing breakage of a substrate.

  In order to achieve the above object, a liquid crystal display device according to a first aspect of the present invention includes a first liquid crystal panel including a first substrate, a first substrate side of the first liquid crystal panel, and the first substrate and the plane. A second liquid crystal panel including a second substrate of substantially the same size, a first polarizing plate disposed between the first substrate and the second substrate, a first substrate and a first polarizing plate, A first bonding layer for bonding the second substrate and a second bonding layer for bonding the second substrate and the first polarizing plate, the first polarizing plate as viewed in a plan view It is formed in a size larger than the size of two substrates.

  In the liquid crystal display device according to the first aspect, as described above, the first polarizing plate disposed between the first substrate of the first liquid crystal panel and the second substrate on the first substrate side of the second liquid crystal panel is provided. The first polarizing plate is formed on the entire surface of the first substrate and the second substrate by forming the first polarizing plate with a size larger than that of the first substrate and the second substrate in plan view. Compared with the case where one polarizing plate is partially formed on the surfaces of the first substrate and the second substrate, the strength when the first polarizing plate is bonded to the first substrate and the second substrate can be improved. it can. Thereby, even when the thickness of the first substrate and the second substrate is reduced, it is possible to prevent the first substrate and the second substrate from being damaged by the force applied to the first substrate and the second substrate.

  In the liquid crystal display device according to the first aspect, preferably, the first liquid crystal panel and the second liquid crystal panel each include a first liquid crystal layer and a second liquid crystal layer, and the first liquid crystal layer is interposed through the first liquid crystal layer. The first liquid crystal of the second liquid crystal panel is opposed to the second substrate through the second liquid crystal layer, the third substrate provided on the opposite side of the first liquid crystal panel from the second liquid crystal panel. And a fourth substrate provided on the opposite side of the panel, wherein the thickness of at least one of the third substrate and the fourth substrate is greater than the thickness of the first substrate and the second substrate. If comprised in this way, since the intensity | strength of a 3rd board | substrate and a 4th board | substrate can be enlarged compared with a 1st board | substrate and a 2nd board | substrate, while being able to make the intensity | strength of a liquid crystal display device high, a 3rd board | substrate And when mounting an electronic component etc. on a 4th board | substrate, it can suppress that a 3rd board | substrate and a 4th board | substrate are damaged.

  In this case, preferably, the first substrate and the second substrate are formed larger than the third substrate and the fourth substrate in a plan view, and the first polarizing plate is formed of the first substrate and the second substrate. It is formed in a size larger than the size. If comprised in this way, while being able to mount an electronic component etc. in the area | region currently formed larger than the 3rd board | substrate and 4th board | substrate of a 1st board | substrate and a 2nd board | substrate, the 1st board | substrate and 2nd board | substrate The mounting area can be reinforced by the first polarizing plate.

  In the liquid crystal display device according to the first aspect, preferably, the first substrate is provided with a first thin film transistor, the second substrate is provided with a second thin film transistor, and the first substrate and the second substrate are first. Terminals are respectively formed on the surface opposite to the polarizing plate side, and the first polarizing plate is formed so as to cover the back surface of the surface on which the terminals of the first substrate and the second substrate are formed. If comprised in this way, since the area | region in which the terminal of the 1st board | substrate and the 2nd board | substrate is formed can be reinforced with a 1st polarizing plate, when mounting an electronic component etc., a 1st board | substrate and a 2nd board | substrate are mounted. It can suppress that the area | region in which the terminal of the board | substrate is formed is damaged.

  In the liquid crystal display device according to the first aspect, the first liquid crystal panel and the second liquid crystal panel each include a first liquid crystal layer and a second liquid crystal layer, and face the first substrate through the first liquid crystal layer. In addition, a third substrate provided on the opposite side of the first liquid crystal panel from the second liquid crystal panel is opposed to the second substrate through the second liquid crystal layer, and the first liquid crystal panel of the second liquid crystal panel is A fourth substrate provided on the opposite side, a second polarizing plate provided on the surface of the third substrate opposite to the first liquid crystal layer side, and a surface of the fourth substrate opposite to the second liquid crystal layer side A third polarizing plate may be further provided, and the second polarizing plate and the third polarizing plate may be formed smaller than the first polarizing plate in plan view.

  In the liquid crystal display device according to the first aspect, preferably, the first liquid crystal panel includes a first pixel electrode and a first common electrode, and the second liquid crystal panel includes a second pixel electrode and a second common electrode, The first pixel electrode and the first common electrode included in the first liquid crystal panel are provided on the first substrate side, and the second pixel electrode and the second common electrode included in the second liquid crystal panel are provided on the second substrate side. It has been. With this configuration, the first liquid crystal panel and the second liquid crystal panel can be configured in a transverse electric field mode such as FFS (Fringe Field Switching) or IPS (In Plane Switching), so that the viewing angle can be increased. it can.

  In the liquid crystal display device according to the first aspect, preferably, the first bonding layer is formed of an adhesive layer or an adhesive layer, and the second bonding layer is formed of an adhesive layer or an adhesive layer. With this configuration, the first substrate and the first polarizing plate can be reliably fixed by the first bonding layer made of the adhesive layer or the pressure-sensitive adhesive layer, and the first layer made of the adhesive layer or the pressure-sensitive adhesive layer. The second bonding layer and the first polarizing plate can be reliably fixed by the two bonding layers.

  An electronic apparatus according to a second aspect of the present invention includes a liquid crystal display device having any one of the configurations described above. If comprised in this way, even when the thickness of a 1st board | substrate and a 2nd board | substrate is made small, the electronic device which can suppress that a 1st board | substrate and a 2nd board | substrate will be damaged can be obtained.

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

(First embodiment)
FIG. 1 is a plan view of a liquid crystal display device according to a first embodiment of the present invention. FIG. 2 is a perspective view of the liquid crystal display device according to the first embodiment of the present invention. 3 and 4 are cross-sectional views of the liquid crystal display device according to the first embodiment of the present invention. With reference to FIGS. 1-4, the structure of the liquid crystal display device 100 by 1st Embodiment of this invention is demonstrated.

  As shown in FIG. 2, the liquid crystal display device 100 according to the first embodiment is configured by overlapping a liquid crystal panel 100a and a liquid crystal panel 100b. The liquid crystal panel 100a and the liquid crystal panel 100b are examples of the “first liquid crystal panel” and the “second liquid crystal panel” of the present invention, respectively. In the liquid crystal panel 100a (100b), as shown in FIG. 1, a display unit 2, a V driver 3, and an H driver 4 including a plurality of pixels 2a are provided on a TFT substrate 1a (TFT substrate 1b) made of glass. Yes. A plurality of gate lines 5 and a plurality of data lines 6 are connected to the V driver 3 and the H driver 4, respectively. The TFT substrate 1a is an example of the “first substrate” in the present invention, and the TFT substrate 1b is an example of the “second substrate” in the present invention. The TFT substrate 1a and the TFT substrate 1b are formed in substantially the same size as viewed in plan. Further, the TFT substrate 1a (1b) is provided with a drive IC 7, and the display unit 2, the V driver 3, and the H driver 4 are connected to the drive IC 7.

  Here, in the first embodiment, as shown in FIG. 2, a polarizing plate 8 is disposed between the liquid crystal panel 100a and the liquid crystal panel 100b. The polarizing plate 8 is an example of the “first polarizing plate” in the present invention. The TFT substrate 1a of the liquid crystal panel 100a is bonded to the surface of the polarizing plate 8 on the arrow Z1 direction side with an adhesive layer 9a made of a thermosetting resin or a light (UV) curable resin. The TFT substrate 1b of the liquid crystal panel 100b is bonded to the surface of the polarizing plate 8 on the arrow Z2 direction side with an adhesive layer 9b made of a thermosetting resin or a light (UV) curable resin. The adhesive layer 9a and the adhesive layer 9b are examples of the “first bonding layer” and the “second bonding layer” in the present invention, respectively.

  Further, in the first embodiment, as shown in FIG. 3, the polarizing plate 8 is formed to have substantially the same size as the TFT substrate 1a (1b) in plan view. A terminal 10a (10b) is formed at the end of the TFT substrate 1a (1b), and an FPC (flexible printed circuit board) 11 is connected to the terminal 10a (10b). The polarizing plate 8 is formed so as to cover the back surface of the surface (region) where the terminals 10a (10b) of the TFT substrate 1a (1b) are formed.

  Further, on the liquid crystal panel 100a side, on the surface of the TFT substrate 1a on the arrow Z1 direction side, a counter substrate made of glass via a TFT / electrode forming portion 40a, a sealing material 12a, and a black matrix (BM) 13a described later. 14a is formed. The counter substrate 14a is an example of the “third substrate” in the present invention. In the first embodiment, the thickness t1 of the counter substrate 14a is larger than the thickness t2 of the TFT substrate 1a. The TFT substrate 1a is formed larger than the counter substrate 14a in plan view. Specifically, the TFT substrate 1a is formed larger than the counter substrate 14a by the length L1 in the X direction.

  A liquid crystal layer 15a is provided between the TFT / electrode forming portion 40a and the counter substrate 14a. The liquid crystal layer 15a is an example of the “first liquid crystal layer” in the present invention. A polarizing plate 16 is attached to the surface of the counter substrate 14a on the arrow Z1 direction side by an adhesive material layer (not shown). The polarizing plate 16 is an example of the “second polarizing plate” in the present invention. In the first embodiment, the polarizing plate 16 is formed smaller than the polarizing plate 8 in plan view. Specifically, the polarizing plate 16 is formed smaller than the polarizing plate 8 by a length L2 in the X direction. The lengths of the polarizing plate 16 and the polarizing plate 8 in the Y direction are substantially the same. Here, the length of the polarizing plate 16 in the Y direction may be substantially the same as that of the counter substrate 14a. However, if the length of the polarizing plate 16 in the Y direction is shorter than that of the counter substrate 14a, sticking deviation occurs. However, it does not protrude from the counter substrate 14a.

  On the liquid crystal panel 100b side, a counter substrate 14b made of glass is formed on the surface of the TFT substrate 1b on the arrow Z2 direction side through a TFT / electrode forming portion 40b and a sealing material 12b described later. The counter substrate 14b is an example of the “fourth substrate” in the present invention. In the first embodiment, the thickness t3 of the counter substrate 14b is larger than the thickness t4 of the TFT substrate 1b. The TFT substrate 1b is formed larger than the counter substrate 14b in plan view. Specifically, the TFT substrate 1b is formed larger by the length L3 in the X direction than the counter substrate 14b.

  A liquid crystal layer 15b is provided between the TFT / electrode forming portion 40b and the counter substrate 14b. The liquid crystal layer 15b is an example of the “second liquid crystal layer” in the present invention. A polarizing plate 17 is bonded to the surface of the counter substrate 14b on the arrow Z2 direction side by an adhesive material layer (not shown). The polarizing plate 17 is an example of the “third polarizing plate” in the present invention. In the first embodiment, the polarizing plate 17 is formed smaller than the polarizing plate 8 in plan view. Specifically, the polarizing plate 17 is formed smaller than the polarizing plate 8 by a length L4 in the X direction. The polarizing plate 17 and the polarizing plate 8 have substantially the same length in the Y direction. Here, the length of the polarizing plate 17 in the Y direction may be substantially the same as that of the counter substrate 14b. However, if the length of the polarizing plate 17 in the Y direction is shorter than that of the counter substrate 14b, sticking deviation occurs. However, it does not protrude from the counter substrate 14b.

  Further, the polarizing plate 16 and the polarizing plate 17 are polarizing plates such that the polarizing axes (polarizing directions) of the polarizing plates 16 and 17 intersect perpendicularly (90 °) with the polarizing axis (polarizing direction) of the polarizing plate 8. 8 in a crossed Nicol state.

  As shown in FIG. 2 and FIG. 3, a backlight 18 is provided on the arrow Z2 direction side of the liquid crystal panel 100b. The backlight 18 is configured to emit light from the liquid crystal panel 100b side toward the liquid crystal panel 100a side.

  Next, a detailed configuration of the TFT / electrode forming portion 40a (40b) of the liquid crystal panel 100a (100b) according to the first embodiment of the present invention will be described with reference to FIG.

  In the liquid crystal panel 100a (100b), as shown in FIG. 4, a buffer film 19a (19b) is formed on the surface of the TFT substrate 1a (1b). The buffer film 19a (19b) is made of a silicon oxide film, a silicon nitride film, or the like. An active layer 21a (21b) is formed in a region where a pixel selection TFT (thin film transistor) 20a (20b) is formed on the surface of the buffer film 19a (19b). The TFT 20a (20b) is an example of the “first (2) thin film transistor” in the present invention. The active layer 21a (21b) is made of polysilicon or the like.

  An insulating film 22a (22b) is formed on the surface of the buffer film 19a (19b) so as to cover the active layer 21a (21b). A portion of the insulating film 22a (22b) located in the active layer 21a (21b) functions as a gate insulating film. The insulating film 22a (22b) is made of a silicon oxide film or a silicon nitride film. A gate line 5a (5b) functioning as a gate electrode is formed on the surface of the insulating film 22a (22b) functioning as a gate insulating film. The gate line 5a (5b) is made of a metal containing chromium or molybdenum. An interlayer insulating film 23a (23b) is formed on the surfaces of the gate line 5a (5b) and the insulating film 22a (22b).

  A contact hole 25a (25b) for exposing the source region 24a (24b) of the active layer 21a (21b) and a drain region 26a (26b) are formed in the interlayer insulating film 23a (23b) and the insulating film 22a (22b). A contact hole 27a (27b) is formed for exposing. A source electrode 6a (6b) is formed to connect to the source region 24a (24b) through the contact hole 25a (25b) and to extend on the surface of the interlayer insulating film 23a (23b). The source electrode 6a (6b) is made of a metal including aluminum or an aluminum alloy.

  A drain electrode 28a (28b) is formed to connect to the drain region 26a (26b) through the contact hole 27a (27b) and to extend on the surface of the interlayer insulating film 23a (23b). The drain electrode 28a (28b) is made of a metal including aluminum or an aluminum alloy. A planarizing film 29a (29b) made of an insulating film is formed on the surfaces of the source electrode 6a (6b), the drain electrode 28a (28b), and the interlayer insulating film 23a (23b). The TFT 20a (20b) includes an active layer 21a (21b) including a source region 24a (24b) and a drain region 26a (26b), a drain electrode 28a (28b), and a gate electrode (gate line 5a (5b)). It is composed of

  Further, a contact hole 30a (30b) for exposing the drain electrode 28a (28b) is formed in the planarizing film 29a (29b). A pixel electrode 31a (31b) made of a transparent electrode such as ITO (indium tin oxide) is formed on the surface of the planarizing film 29a (29b). The pixel electrode 31a (31b) is an example of the “first (2) pixel electrode” in the present invention. The pixel electrode 31a (31b) is connected to the drain electrode 28a (28b) through the contact hole 30a (30b).

  An insulating film 32a (32b) is formed on the surface of the pixel electrode 31a (31b). A common electrode 33a (33b) having a plurality of slits 331a (331b) is formed on the surface of the insulating film 32a (32b). The common electrode 33a (33b) is an example of the “first (2) common electrode” in the present invention. Thus, the liquid crystal display device 100 is driven by an FFS (Fringe Field Switching) method in which a horizontal electric field is generated between the pixel electrodes 31a (31b) and the common electrodes 33a (33b) positioned above and below. Yes.

  FIG. 5 and FIG. 6 are diagrams for explaining an example of an electronic apparatus using the liquid crystal display device according to the first embodiment of the present invention. Next, with reference to FIGS. 5 and 6, an electronic apparatus using the liquid crystal display device 100 according to the first embodiment of the present invention will be described.

  The liquid crystal display device 100 according to the first embodiment of the present invention can be used for a mobile phone 200, a PC (Personal Computer) 300, and the like, as shown in FIGS. In the mobile phone 200 of FIG. 5, the liquid crystal display device 100 according to the first embodiment of the present invention is used for the display screen 200a. 6 can be used for an input unit such as a keyboard 300a and a display screen 300b.

  In the first embodiment, as described above, the polarizing plate 8 is formed in substantially the same size as the TFT substrate 1a (1b) in plan view, whereby the thickness t2 (T2) of the TFT substrate 1a (1b) is obtained. Even when t4) is reduced, the strength of the TFT substrate 1a (1b) can be improved, so that the TFT substrate 1a (1b) is prevented from being damaged by the force applied to the liquid crystal panel 100a (100b). Can do.

  In the first embodiment, as described above, the polarizing plate 8 is formed in a size larger than the size of the TFT substrate 1a (1b), so that the counter substrate 14a (14b) of the TFT substrate 1a (1b) is formed. Electronic components (the driving IC 7 and the FPC 11) and the like can be mounted in a larger area, and the mounting area of the TFT substrate 1a (1b) can be reinforced by the polarizing plate 8.

  In the first embodiment, as described above, the polarizing plate 8 is formed so as to cover the back surface of the surface on which the terminal 10a (10b) of the TFT substrate 1a (1b) is formed, so that the TFT substrate 1a ( Since the region where the terminal 10a (10b) of 1b) is formed can be reinforced by the polarizing plate 8, the terminal 10a of the TFT substrate 1a (1b) is mounted when the electronic components (the driving IC 7 and the FPC 11) are mounted. It can suppress that the area | region in which (10b) is formed is damaged.

  In the first embodiment, as described above, the pixel electrode 31a and the common electrode 33a are provided on the TFT substrate 1a side, and the pixel electrode 31b and the common electrode 33b are provided on the TFT substrate 1b side, whereby the liquid crystal panel 100a (100b ) Can be configured in a transverse electric field mode such as FFS (Fringe Field Switching) or IPS (In Plane Switching), so that the viewing angle can be increased.

  In the first embodiment, as described above, the first bonding layer is the adhesive layer 9a and the second bonding layer is the adhesive layer 9b. Can be fixed by the adhesive layer 9a, and the TFT substrate 1b and the polarizing plate 8 can be fixed by the adhesive layer 9b.

(Second Embodiment)
FIG. 7 is a cross-sectional view of a liquid crystal display device according to a second embodiment of the present invention. Referring to FIG. 7, in the liquid crystal display device 101 according to the second embodiment, unlike the first embodiment, the polarizing plate 8a is formed larger than the TFT substrate 1a (1b) in plan view. The case will be described.

  In the liquid crystal display device 101 according to the second embodiment, as shown in FIG. 7, the polarizing plate 8a is formed larger than the TFT substrate 1a (1b) in plan view. Specifically, the polarizing plate 8a is formed larger than the TFT substrate 1a (1b) by a length L5 in the X direction.

  In addition, when the polarizing plate 8a is formed larger than the TFT substrate 1a (1b) in plan view, the TFT substrate 1a (1b) is bonded to the TFT substrate 1a (1b) and the polarizing plate 8a. Is slightly larger than the polarizing plate 8a, the polarizing plate 8a is formed larger than the TFT substrate 1a (1b), so that the polarizing plate 8a is surely overlapped with the TFT substrate 1a (1b). Can be pasted together.

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

  The effect of the second embodiment is the same as the effect of the first embodiment.

(Third embodiment)
8 and 9 are cross-sectional views of a liquid crystal display device according to a third embodiment of the present invention. With reference to FIGS. 8 and 9, in the liquid crystal display device 102 according to the third embodiment, unlike the first embodiment, a case where the counter substrate 14 c and the counter substrate 14 d are bonded to the polarizing plate 8 will be described. .

  In the liquid crystal display device 102 according to the third embodiment, as shown in FIGS. 8 and 9, the counter substrate 14c and the counter substrate 14d are bonded to the polarizing plate 8 by the adhesive layer 9a and the adhesive layer 9b, respectively. . The TFT substrate 1c provided with the TFT 20a and the TFT substrate 1d provided with the TFT 20b are provided on the polarizing plate 16 side and the polarizing plate 17 side, respectively. The counter substrate 14c (14d) is an example of the “first (2) substrate” in the present invention, and the TFT substrate 1c (1d) is an example of the “third (4) substrate” in the present invention.

  Further, the polarizing plate 16 provided on the TFT substrate 1c and the polarizing plate 17 provided on the TFT substrate 1d are formed so as to be smaller than the polarizing plate 8 in plan view. Note that when the counter substrate 9 a (9 b) is bonded to the polarizing plate 8, the polarizing plate 16 (17) may be formed to have approximately the same size as the polarizing plate 8.

  Further, terminals 10a (10b) are respectively formed on the surface of the TFT substrate 1c (1d) on the polarizing plate 8 side. A black matrix 13b is formed on the surface of the counter substrate 14c of the liquid crystal panel 102a on the arrow Z1 direction side. Further, the thickness t1 (t3) of the TFT substrate 1c (1d) is configured to be larger than the thickness t2 (t4) of the counter substrate 14c (14d).

  In addition, the other structure of 3rd Embodiment is the same as that of the said 1st Embodiment.

  In the third embodiment, as described above, the thickness t1 (t3) of the TFT substrate 1c (1d) is made larger than the thickness t2 (t4) of the counter substrate 14c (14d), so that the TFT substrate 1c (1d) Can be made stronger than the counter substrate 14c (14d), so that the strength of the liquid crystal display device 102 can be increased, and electronic components (the driving IC 7 and the FPC 11) are provided on the TFT substrate 1c (1d). When mounting, it can suppress that TFT substrate 1c (1d) is damaged.

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

(Fourth embodiment)
FIG. 10 is a cross-sectional view of a liquid crystal display device according to a fourth embodiment of the present invention. Referring to FIG. 10, in the liquid crystal display device 103 according to the fourth embodiment, unlike the third embodiment, the polarizing plate 8b is formed larger than the counter substrate 14c (14d) in plan view. The case will be described.

  In the liquid crystal display device 103 according to the fourth embodiment, as shown in FIG. 10, the polarizing plate 8b is formed larger than the counter substrate 14c (14d) in plan view. Specifically, the polarizing plate 8b is formed larger than the counter substrate 14c (14d) by a length L6 in the X direction.

  In addition, the other structure of 4th Embodiment is the same as that of the said 3rd Embodiment.

  The effect of the fourth embodiment is the same as the effect of the third embodiment.

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

  For example, in the first to fourth embodiments, the liquid crystal display device driven by the horizontal electric field mode (FFS method) is shown as an example of the liquid crystal display device. However, the present invention is not limited to this, and the vertical electric field mode is used. It can also be applied to a driven liquid crystal display device. For example, as in the liquid crystal display device 104 shown in FIG. 11, a vertical electric field is generated between the pixel electrode 31a (31b) and the common electrode 33c (33d) arranged to face each other with the liquid crystal layer 15a (15b) interposed therebetween. The present invention is also applicable to a liquid crystal display device driven by a TN (twisted nematic) method.

  Moreover, in the said 1st-4th embodiment, although the example which comprises an adhesive material layer from a thermosetting resin, light (UV) curable resin, etc. was shown, this invention is not limited to this, An adhesive material layer is shown. You may comprise by the adhesive material layer (The adhesive material layer etc. which are not hardened | cured). For example, like the liquid crystal display device 105 shown in FIG. 12, the polarizing plate 8 and the TFT substrate 1b may be bonded together by the adhesive layer 9c.

  In the first to fourth embodiments, the liquid crystal panels 100a and 100b are not provided with color filters. However, the present invention is not limited to this, and both the liquid crystal panels 100a and 100b or the liquid crystal panel 100a. And 100b may be provided with a color filter.

  In the first to fourth embodiments, the BM (black matrix) is provided in one of the liquid crystal panels 100a and 100b. However, the present invention is not limited to this. The black matrix (BM) may be provided on both of the liquid crystal panels 100b, or the black matrix (BM) may not be provided on both of the liquid crystal panels 100a and 100b.

1 is a plan view of a liquid crystal display device according to a first embodiment of the present invention. 1 is a perspective view of a liquid crystal display device according to a first embodiment of the present invention. 1 is a cross-sectional view of a liquid crystal display device according to a first embodiment of the present invention. 1 is a cross-sectional view of a liquid crystal display device according to a first embodiment of the present invention. It is a figure for demonstrating an example of the electronic device using the liquid crystal display device by 1st Embodiment of this invention. It is a figure for demonstrating an example of the electronic device using the liquid crystal display device by 1st Embodiment of this invention. It is sectional drawing of the liquid crystal display device by 2nd Embodiment of this invention. It is sectional drawing of the liquid crystal display device by 3rd Embodiment of this invention. It is sectional drawing of the liquid crystal display device by 3rd Embodiment of this invention. It is sectional drawing of the liquid crystal display device by 4th Embodiment of this invention. It is sectional drawing for demonstrating the 1st modification of 1st Embodiment of this invention. It is sectional drawing for demonstrating the 2nd modification of 1st Embodiment of this invention.

Explanation of symbols

1a TFT substrate (first substrate)
1b TFT substrate (second substrate)
1c TFT substrate (third substrate)
1d TFT substrate (4th substrate)
8, 8a, 8b Polarizing plate (first polarizing plate)
9a Adhesive layer (first bonding layer)
9b Adhesive layer (second bonding layer)
10a, 10b Terminal 14a Counter substrate (third substrate)
14b Counter substrate (fourth substrate)
14c Counter substrate (first substrate)
14d Counter substrate (second substrate)
15a Liquid crystal layer (first liquid crystal layer)
15b Liquid crystal layer (second liquid crystal layer)
16 Polarizing plate (second polarizing plate)
17 Polarizing plate (third polarizing plate)
20a TFT (first thin film transistor)
20b TFT (second thin film transistor)
31a Pixel electrode (first pixel electrode)
31b Pixel electrode (second pixel electrode)
33a Common electrode (first common electrode)
33b Common electrode (second common electrode)
100, 101, 102, 103, 104, 105 Liquid crystal display devices 100a, 101a, 102a, 103a, 104a First liquid crystal panels 100b, 101b, 102b, 103b, 104b Second liquid crystal panels

Claims (8)

A first liquid crystal panel including a first substrate;
A second liquid crystal panel that is disposed on the first substrate side of the first liquid crystal panel and includes a second substrate having substantially the same size as the first substrate in plan view;
A first polarizing plate disposed between the first substrate and the second substrate;
A first bonding layer for bonding the first substrate and the first polarizing plate;
A second bonding layer for bonding the second substrate and the first polarizing plate;
The liquid crystal display device, wherein the first polarizing plate is formed in a size larger than the size of the first substrate and the second substrate in a plan view. The first liquid crystal panel and the second liquid crystal panel each include a first liquid crystal layer and a second liquid crystal layer,
A third substrate provided opposite to the second liquid crystal panel of the first liquid crystal panel while facing the first substrate via the first liquid crystal layer;
A fourth substrate provided on the opposite side of the second liquid crystal panel from the first liquid crystal panel while facing the second substrate via the second liquid crystal layer;
2. The liquid crystal display device according to claim 1, wherein a thickness of at least one of the third substrate and the fourth substrate is larger than a thickness of the first substrate and the second substrate. The first substrate and the second substrate are formed larger than the third substrate and the fourth substrate in plan view,
3. The liquid crystal display device according to claim 2, wherein the first polarizing plate is formed to have a size larger than that of the first substrate and the second substrate. The first substrate is provided with a first thin film transistor,
A second thin film transistor is provided on the second substrate,
Terminals are formed on the surfaces of the first substrate and the second substrate opposite to the first polarizing plate, respectively.
The liquid crystal display according to any one of claims 1 to 3, wherein the first polarizing plate is formed so as to cover a back surface of a surface on which the terminals of the first substrate and the second substrate are formed. apparatus. The first liquid crystal panel and the second liquid crystal panel each include a first liquid crystal layer and a second liquid crystal layer,
A third substrate provided opposite to the second liquid crystal panel of the first liquid crystal panel while facing the first substrate via the first liquid crystal layer;
A fourth substrate provided opposite to the first liquid crystal panel of the second liquid crystal panel while facing the second substrate via the second liquid crystal layer;
A second polarizing plate provided on the surface of the third substrate opposite to the first liquid crystal layer side;
A third polarizing plate provided on the surface opposite to the second liquid crystal layer side of the fourth substrate;
5. The liquid crystal display device according to claim 1, wherein the second polarizing plate and the third polarizing plate are formed smaller than the first polarizing plate in a plan view. The first liquid crystal panel includes a first pixel electrode and a first common electrode,
The second liquid crystal panel includes a second pixel electrode and a second common electrode,
The first pixel electrode and the first common electrode included in the first liquid crystal panel are provided on the first substrate side,
The liquid crystal display device according to claim 1, wherein the second pixel electrode and the second common electrode included in the second liquid crystal panel are provided on the second substrate side. The first bonding layer is composed of an adhesive layer or an adhesive layer,
The liquid crystal display device according to claim 1, wherein the second bonding layer includes an adhesive layer or an adhesive layer.   An electronic apparatus comprising the liquid crystal display device according to claim 1.

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