JP2010096918A - Liquid crystal module, liquid crystal display device, and television receiver - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a liquid crystal module, a liquid crystal display device and a television receiver, using a polarizer prepared by joining a plurality of polarizers, in which generation of a gap between polarizers constituting the joined polarizer is prevented. <P>SOLUTION: The liquid crystal module includes a liquid crystal panel 11 having polarizing plates 110, 111 disposed on both faces. The two polarizing plates 110, 111 disposed on both faces of the liquid crystal panel 11 include polarizers 110B, 111B and protective films 110A, 111A covering the surfaces of the polarizers 110B, 111B, respectively. At least one of the polarizing plates 110, 111 has a joined polarizer 112 prepared by joining end faces of a plurality of polarizers 110B, 111B. A suppressing member 31 having a coefficient of thermal expansion lower than that of the protective film 111A and suppressing expansion of the protective film 111A is disposed at a position adjacent to at least an end face of the polarizing plate 110, 112 having the joined polarizer 112, the end face opposing to the joined face 112A, of the end faces of the polarizing plate. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a liquid crystal module, a liquid crystal display device, and a television receiver.

  A liquid crystal display device such as a liquid crystal television is provided with a liquid crystal panel composed of a pair of substrates in which liquid crystal is enclosed, and polarizing plates are arranged on both surfaces of the liquid crystal panel. Polarizing plates are often arranged so that their polarization axes intersect at 90 degrees on both sides of the liquid crystal panel (display surface side and backlight side). In general liquid crystal televisions, the horizontal dimension is the vertical dimension. A polarizing plate having a rectangular shape and a polarization axis parallel to the longitudinal direction of the polarizing plate, and a polarizing plate having a rectangular shape and a polarization axis parallel to the short side direction of the polarizing plate Are arranged.

  The polarizing plate is produced by attaching a protective film made of a transparent resin to the surface of a polarizer having a polarizing axis, with an adhesive. The polarizing axis of the polarizer is formed by performing a stretching process. Specifically, the polarizing axis of the polarizer is, for example, a polyvinyl alcohol (PVA) resin film adsorbed with a dichroic dye such as iodine produced in a roll shape is stretched in the roll traveling direction (longitudinal direction). By doing so, it is formed in the traveling direction of the roll.

  A rectangular polarizing plate used for a general liquid crystal television, and when the polarizing axis is made parallel to the longitudinal direction of the polarizing plate, if the vertical dimension of the polarizing plate is smaller than the width of the roll A single polarizer may be produced by the above-described method of stretching in the roll traveling direction.

  On the other hand, when a polarizing plate having a polarizing axis perpendicular to the longitudinal direction of the polarizing plate is produced, it is conceivable to form a polarizing axis by stretching a PVA resin film produced in a roll shape in a direction perpendicular to the longitudinal direction of the roll. However, with this method, it is difficult to form the polarization axis uniformly. Therefore, a polarizer produced by stretching a PVA resin film produced in a roll shape in the roll traveling direction is usually cut into a predetermined size and used. In the case of using a polarizer produced by stretching a PVA resin film in the traveling direction of the roll, it is sufficient to produce a single polarizer if the lateral dimension of the polarizing plate is smaller than the width of the roll. When an ultra-large polarizing plate used for an ultra-large liquid crystal television is manufactured, since the horizontal dimension of the polarizing plate is often larger than the width of the roll, two or more polarizers are required.

Further, when the size of the liquid crystal television is further increased, even if a polarizing plate whose polarization axis is parallel to the longitudinal direction of the polarizing plate is produced, it is 2 if the vertical dimension of the polarizing plate is larger than the width of the roll. More than one polarizer is required.
As the liquid crystal display device including a large polarizing plate manufactured using two or more polarizers as described above, those described in Patent Document 1 and Patent Document 2 are known.
JP 2007-187717 A JP 2007-187718 A

A large polarizing plate using a plurality of polarizers connects the end faces so that the plurality of polarizers do not overlap to form a single bonded polarizer, and adheres a protective film to cover the surface of the bonded polarizer. It is produced by pasting with an agent.
However, in a polarizing plate having a bonded polarizer in which a plurality of polarizers are joined together, a gap is formed at the joint where the polarizers are joined by repeated temperature rise and temperature decrease. There was a problem. The reason why such a problem occurs is considered as follows.

  In many cases, the protective film and the polarizer constituting the polarizing plate have a thermal expansion coefficient larger than that of the polarizer. Therefore, the polarized light having a bonded polarizer obtained by connecting a plurality of polarizers into one sheet. Also in the plate, when the temperature rises, the protective film expands more than the polarizer. Therefore, when the temperature of the polarizing plate rises and the protective film expands in the outer direction, each polarizer constituting the bonded polarizer is pulled outward in a state of being attached to the protective film. And when the temperature of a polarizing plate falls, a protective film will shrink | contract. By repeating such expansion and contraction of the polarizing plate, it is considered that the joint between the polarizers is removed and a gap is formed between the polarizers.

  The present invention has been completed based on the above situation, and in a liquid crystal module, a liquid crystal display device, and a television receiver using a bonded polarizer obtained by connecting a plurality of polarizers into one sheet, An object is to prevent a gap from being generated between the polarizers constituting the polarizer.

  As a result of intensive studies to solve the above problems, a member having a thermal conductivity lower than that of the protective film at a position adjacent to the end face of the polarizing plate having a bonded polarizer obtained by joining a plurality of polarizers into one sheet As a result, it was found that a gap can be prevented from being generated in a portion where a plurality of polarizers are joined (joined).

  That is, the present invention is a liquid crystal module including a liquid crystal panel having polarizing plates on both sides, and the two polarizing plates arranged on both sides of the liquid crystal panel respectively have a polarizer and a surface of the polarizer. A protective film to be coated, and at least one of the two polarizing plates has a bonded polarizer formed by bonding a plurality of polarizers at an end face, and the bonded polarizer is A suppression member that suppresses expansion of the protective film at a position lower than the protective film at least at a position adjacent to an end surface facing the bonding surface where the plurality of polarizers are bonded, among the end surfaces of the polarizing plate. A liquid crystal module, a liquid crystal display device including the liquid crystal module and an illumination device, and a television receiver including the liquid crystal display device.

The reason why the gap between the polarizers can be prevented by doing in this way is considered as follows.
When the temperature of the polarizing plate rises, the protective film expands outward, but according to the present invention, the suppressing member having a lower coefficient of thermal expansion than the protective film has a bonded polarizer formed by connecting a plurality of polarizers. Since it is provided at a position adjacent to the end face opposite to the face (joint face) where at least a plurality of polarizers are joined among the end faces of the polarizing plate, it is protected in a direction perpendicular to the face of the polarizer. Suppresses expansion of the membrane. By suppressing the expansion of the protective film, movement of the polarizer attached to the protective film can be prevented, and it is considered that a gap is hardly generated between the polarizers.

The present invention may have the following configuration.
(1) It is preferable that the suppression member is provided corresponding to each end face of the polarizing plate having the bonded polarizer, because expansion of the protective film can be suppressed on each end face of the polarizing plate.

  (2) It is preferable that the suppressing member is provided along the entire circumference of the end face of the polarizing plate having the bonded polarizer, because expansion of the protective film can be suppressed along the entire circumference of the end face of the polarizing plate.

(3) The liquid crystal module includes a first holding member that is disposed outside the liquid crystal panel and integrally holds the liquid crystal panel and a lighting device that emits light to the liquid crystal panel. Among the two polarizing plates disposed on both sides of the first polarizing plate, at least the polarizing plate disposed on the first holding member side has a bonded polarizer, and the suppressing member is disposed on the liquid crystal panel side of the first holding member. It is set as the structure provided in.
In the present invention, the member provided with the suppressing member is preferably a member disposed in the vicinity of the end face of the polarizing plate having a bonded polarizer, and specifically, a liquid crystal panel substrate (a substrate in which liquid crystal is enclosed). And a holding member for holding the liquid crystal panel. However, when a suppressing member is provided on the surface of the substrate of the liquid crystal panel, there are cases where repair work is hindered when the liquid crystal panel is defective. Such a configuration is preferable because it is not necessary to provide the suppressing member on the surface of the substrate of the liquid crystal panel, and does not hinder repair when a defect occurs in the liquid crystal panel. In this configuration, it is more preferable that the suppressing member is also provided as a buffer member.

(4) The liquid crystal module includes a second holding member that holds the liquid crystal panel between the first holding member and includes two polarizing plates disposed on both surfaces of the liquid crystal panel. At least the polarizing plate disposed on the second holding member side has a bonded polarizer, and the suppression member is provided on the contact surface of the second holding member with the liquid crystal panel.
Such a configuration is preferable because it is not necessary to provide a restraining member on the surface of the substrate of the liquid crystal panel, as in the configuration of (3), and does not hinder repair when a failure occurs in the liquid crystal panel. In this configuration, it is more preferable that the suppressing member is also provided as a buffer member.

(5) The liquid crystal panel has a configuration in which liquid crystal is sealed between a pair of substrates, and a suppression member made of a thermosetting resin is provided on the surface of the substrate.
Such a configuration is preferable because the suppressing member can be provided at a position that is in reliable contact with the end face of the polarizing plate having the bonded polarizer, and the polarizing plate is positioned by the suppressing member.

(6) Of the two polarizing plates disposed on both surfaces of the liquid crystal panel, the number of polarizers of the polarizing plate disposed on the display surface side of the liquid crystal panel is opposite to the display surface of the liquid crystal panel. The number of polarizers included in the polarizing plate disposed on the substrate is smaller.
With such a configuration, a polarizing plate that does not have a bonding polarizer or a polarizing plate with a small bonding surface that can be formed by bonding a plurality of polarizers is arranged on the display surface side, so that the bonding surface is inconspicuous. Therefore, it is preferable.

(7) The second holding member includes a first holding portion that holds the liquid crystal panel between the first holding member and is disposed on the opposite side of the display surface of the liquid crystal panel. It is set as the structure provided with the 2nd clamping part which clamps the optical member made.
Such a configuration is preferable because it includes a member having two or more functions, so that the number of parts can be reduced.

  According to the present invention, in a liquid crystal module, a liquid crystal display device, and a television receiver using a single polarizer obtained by connecting a plurality of polarizers, a gap is generated between the polarizers constituting the bonded polarizer. Can be prevented.

<Embodiment 1>
A first embodiment of the present invention will be described with reference to FIGS. In this embodiment, a television receiver including the liquid crystal module of the present invention is illustrated. A part of each drawing shows an X-axis, a Y-axis, and a Z-axis, and each axis is drawn so as to be the direction shown in each drawing. Moreover, let the upper side shown in FIG.2 and FIG.3 be a front side, and let the lower side shown in FIG.2 and FIG.3 be a back side.

  As shown in FIG. 1, the television receiver TV according to the present embodiment includes a liquid crystal display device 10, front and back cabinets Ca and Cb that are accommodated so as to sandwich the liquid crystal display device 10, a power supply substrate P, and a tuner substrate T. And is configured. The liquid crystal display device 10 has a horizontally long rectangular shape as a whole, and includes a liquid crystal panel 11 and a backlight device 12 (illumination device for liquid crystal display device), which is an external light source, as shown in FIG. Are integrally held by a bezel 13 (first holding member, details of which will be described later).

Next, the liquid crystal panel 11 and the backlight device 12 constituting the liquid crystal display device 10 will be described sequentially.
The liquid crystal panel 11 has a rectangular shape in plan view. As shown in FIG. 3, the pair of glass substrates 11a and 11b (substrates) are bonded to each other with a predetermined gap therebetween, and both the glass substrates 11a and 11a, A liquid crystal layer (not shown) is enclosed between 11b. One glass substrate 11a is provided with a switching element (for example, TFT) connected to a source wiring and a gate wiring orthogonal to each other, a pixel electrode connected to the switching element, an alignment film, and the like. The glass substrate 11b is provided with a color filter in which colored portions such as R (red), G (green), and B (blue) are arranged in a predetermined arrangement, a counter electrode, and an alignment film. Among these, image data and various control signals necessary for displaying an image from a drive circuit substrate (not shown) are supplied to the source wiring, the gate wiring, the counter electrode, and the like. In addition, polarizing plates 111 and 110 are disposed on the outer sides of both glass substrates 11a and 11b, respectively. The polarizing plates 111 and 110 are formed in a rectangular plane having a size slightly smaller than the glass substrates 11a and 11b. The peripheral regions 11c and 11d including the outer peripheral edges of the glass substrates 11a and 11b are formed in the polarizing plates 111 and 110, respectively. It is an area where is not arranged. In the present embodiment, a polarizing plate disposed on the front side (display surface side) of the liquid crystal panel 11 is denoted by 110, and a polarizing plate disposed on the back side (backlight side) of the liquid crystal panel 11 is denoted by 111. Details of the polarizing plates 111 and 110 will be described later.

  As shown in FIGS. 2 and 3, the backlight device 12 is a so-called direct-type backlight device in which a light source is arranged directly under the back surface of the liquid crystal panel 11, and is open on the front side (the liquid crystal panel 11 side). A substantially box-shaped chassis 14, a reflection sheet 15 laid in the chassis 14, a plurality of optical members 16 attached so as to cover the openings of the chassis 14, and a frame 17 capable of sandwiching the optical members 16 (Second holding member, details will be described later), a cold cathode tube 18 which is a plurality of discharge tubes accommodated in parallel in the chassis 14, and each end of the cold cathode tube 18 is shielded from light It has a holder 19 that itself has light reflectivity, and a lamp clip 20 that holds the central portion of the cold cathode tube 18. Further, the backlight device 12 includes an inverter board 21 (power circuit board) disposed on the back side of the chassis 14, a connector 22 for electrically connecting the inverter board 21 and the cold cathode tube 18, and a connector 22. And a third holding member 23 for attaching to the chassis 14.

  The chassis 14 is made of metal such as aluminum, and has a configuration in which a side plate rises from an outer peripheral end of a bottom plate 14 a having a rectangular shape in plan view like the liquid crystal panel 11. The bottom plate 14a is located on the back side of the cold cathode tube 18, and its long side direction coincides with the X-axis direction of each drawing, and its short side direction coincides with the Y-axis direction. The reflection sheet 15 is made of a synthetic resin exhibiting white with excellent light reflectivity and is laid so as to cover almost the entire inner surface of the chassis 14, and transmits light from the cold cathode tube 18 to the optical member 16 side. It has a function of reflecting to the surface.

  The optical member 16 has a rectangular shape in plan view like the bottom plate 14a of the chassis 14 and the liquid crystal panel 11, is made of a synthetic resin having translucency, and has a cold cathode tube 18 on the back side and a liquid crystal panel 11 on the front side. Intervene between. The optical member 16 is composed of, for example, a diffusion plate, a diffusion sheet, a lens sheet, and a brightness enhancement sheet in order from the back side, and emits light emitted from each cold cathode tube 18 that is a linear light source with uniform planar light. It has functions such as converting to.

The cold-cathode tube 18 is a linear light source (tubular light source), and is attached in the chassis 14 in a posture in which the length direction (axial direction) coincides with the long side direction (X-axis direction) of the chassis 14. A plurality of lines are arranged along the short side direction (Y-axis direction) of the chassis 14 with their axes substantially parallel to each other and at a predetermined interval therebetween.
The cold cathode tube 18 includes an elongated glass tube 18a having a circular cross section sealed at both ends, a pair of electrodes (not shown) sealed inside the both ends of the glass tube 18a, and both ends of the glass tube 18a. And a pair of lead terminals 18b protruding from the portion to the outside. The cold cathode tube 18 is a so-called straight tube type in which the glass tube 18a is in a straight line and the electrodes are dispersedly arranged in two directions (right and left in FIG. 3). The glass tube 18a is filled with mercury or the like, and a fluorescent material is applied to the inner wall surface thereof. The fluorescent material of the cold cathode tube 18 includes a plurality of types of fluorescent material particles corresponding to emission colors such as R, G, and B, and the particle size and specific gravity are different for each type. The lead terminals 18b are both made of metal having conductivity, and are elongated and substantially cylindrical, protruding outward (in the direction opposite to the electrode side) along the axial direction (X-axis direction) from the end of the glass tube 18a. The inner end is connected to the electrode in the glass tube 18a, so that it has the same potential as the electrode.

  The holder 19 is made of a synthetic resin exhibiting white with excellent light reflectivity, and as shown in FIG. 2, the holder 19 has a substantially box shape extending along the short side direction of the chassis 14 and having an open back surface. ing. A pair of holders 19 are attached to both ends of the chassis 14 in the long side direction so that the ends of the cold cathode tubes 18 arranged in parallel at the same position can be covered together.

  The lamp clips 20 are made of a synthetic resin exhibiting white having excellent light reflectivity, and are distributed in a predetermined distribution with respect to the inner surface of the bottom plate 14a of the chassis 14. The lamp clip 20 is fixed to the bottom plate 14 a of the chassis 14 and can hold a central portion (light emitting portion) excluding both end portions of each cold cathode tube 18. As a result, the distance between the cold cathode tube 18 and the bottom plate 14a of the chassis 14 can be maintained constant.

Subsequently, the inverter board 21 necessary for supplying power to each cold cathode tube 18 has a circuit pattern on the surface, and various electronic components such as a transformer (not shown) are mounted on the surface. The inverter board 21 controls the turning on / off of the cold cathode tube 18 by applying an alternating voltage of a predetermined frequency to the cold cathode tube 18.
As shown in FIG. 3, a pair of inverter boards 21 are attached to the back surface of the bottom plate 14a of the chassis 14 (the surface opposite to the installation surface of the cold cathode tubes 18). It is unevenly distributed at both end positions in the direction. The inverter substrate 21 has a rectangular shape in plan view, and the plate surface thereof is orthogonal to the plate surface of the bottom plate 14a of the chassis 14 (X-axis direction and Y-axis direction, the Z-axis direction that is the thickness direction of the liquid crystal display device 10). And the long side direction thereof coincides with the short side direction of the bottom plate 14a (the Y-axis direction, the direction perpendicular to the axial direction of the cold cathode tube 18). It is fixed by. Out of the long side ends of the inverter board 21, the outward long side ends (ends facing the connector 22) are individually fitted and connected to the connectors 22 described below. A connector connection protrusion (not shown) is provided.

As shown in FIG. 3, the connector 22 is for electrically relaying the inverter board 21 and each cold cathode tube 18, and is connected to the lead terminal 18b of each cold cathode tube 18 on one end side. The light source connection portion 22a to be connected to the connector connection protrusion of the inverter substrate 21 is provided on the other end side. The output voltage output from the inverter board 21 is applied to the lead terminal 18 b of the cold cathode tube 18 through the connector 22.
As shown in FIG. 3, the third holding member 23 that holds the connector 22 can be attached to the attachment hole 14 b of the bottom plate 14 a of the chassis 14. The third holding member 23 is made of synthetic resin, has a substantially box shape that opens toward the front side, and is assembled to the connector 22 from the back side along the Z-axis direction.

  In the present embodiment, the liquid crystal panel 11 includes a bezel 13 (first holding member) disposed on the outer side (front side), and a frame 17 (second holding member) disposed on the back side of the liquid crystal panel 11. And two polarizing plates 110 and 111 are provided on the surface thereof. Hereinafter, the polarizing plates 110 and 111, the bezel 13, and the frame 17 will be described in order.

As shown in FIGS. 3 and 4, the polarizing plates 110 and 111 disposed on both surfaces of the liquid crystal panel 11 are held in an attached state to the glass substrates 11 b and 11 a by the adhesive layer. In addition, the thickness dimension of the polarizing plates 110 and 111 is set thinner than the glass substrates 11b and 11a.
The polarizing plates 110 and 111 are translucent and can restrict vibrations of a passing light wave in a predetermined direction, and protective films that are attached to both surfaces of the polarizers 110B and 111B with an adhesive. 110A, 111A.
Specifically, in the polarizing plate 110 arranged on the front side of the liquid crystal panel 11 out of the two polarizing plates 110 and 111, one protective film 110A is attached to each of both surfaces of one rectangular polarizer 110B. It has been. On the other hand, in the polarizing plate 111 disposed on the back side of the liquid crystal panel 11, as shown in FIG. 5, two rectangular polarizers 111B are joined together at the end face to form one bonded polarizer 112, and the bonded One protective film 111 </ b> A is attached to each side of the polarizer 112.

  As the protective films 110A and 111A attached to the surfaces of the polarizers 110B and 111B, transparent resin films can be used. Specific examples include resin films made of cellulose resins such as triacetyl cellulose, diacetyl cellulose, and cellulose acetate butyrate, cyclic olefins using cyclic olefins such as norbornene, acrylic resins, and polycarbonate resins. Of these, cellulose resins and cyclic olefin resins are preferred because of their high heat resistance.

  As the polarizers 110B and 111B, a polarizer on which a dichroic dye such as iodine or a dichroic organic dye is adsorbed can be used. Specifically, a polarizer prepared by subjecting a polyvinyl alcohol (PVA) resin film to a stretching operation, an operation for adsorbing a dichroic dye, and an operation for fixing the adsorption orientation of the dichroic dye is used. Can do. The stretching operation and the dichroic dye adsorption operation may be performed simultaneously, or the dichroic dye adsorption operation may be performed and then the stretching operation may be performed.

Next, the bezel 13 and the frame 17 that hold the liquid crystal panel 11 in the present embodiment will be described.
The surface of the bezel 13 on the liquid crystal panel 11 side is in contact with the polarizing plate 110 disposed on the front side of the liquid crystal panel 11 as shown in FIGS. 3 and 4. Further, a buffer member 30 is provided between the bezel 13 and the peripheral region 11 d (region where the polarizing plate 110 is not provided) of the glass substrate 11 b arranged on the front side of the liquid crystal panel 11.

The frame 17 has a frame shape along the outer peripheral edge of the liquid crystal panel 11 or the optical member 16. The frame 17 can receive the liquid crystal panel 11 from the back side, and has a first sandwiching portion 17A that can sandwich the liquid crystal panel 11 with the bezel 13 disposed on the front side of the liquid crystal panel 11. . The frame 17 has a second holding portion 17B that is arranged on the front side of the optical member 16 and that can hold the outer peripheral edge portion of the optical member 16 between the side plate of the chassis 14 and the holder 19.
The outer peripheral edge of the polarizing plate 111 disposed on the back side of the liquid crystal panel 11 on the upper end surface of the first sandwiching portion 17A of the frame 17 (the surface in contact with the peripheral area 11c of the glass substrate 11a on the back surface side of the liquid crystal panel 11) A frame-shaped member 31 is provided.

  The frame-shaped member 31 is disposed so that the inner surface thereof is adjacent to the end surface of the polarizing plate 111 (the polarizing plate 111 having the bonded polarizer 112) disposed on the back side of the liquid crystal panel 11, and the protective film 110A. , 111A, and has a function as a suppressing member 31 that suppresses expansion of the protective film 111A. In addition, the said suppression member 31 also has a function as the buffer member 30 which relieves the collision with the glass substrate 11a and the flame | frame 17. FIG.

  In the present embodiment, the suppressing member 31 is a method of applying a material having a lower coefficient of thermal expansion than the protective films 110A and 111A, for example, a thermosetting resin such as epoxy resin or polyurethane on the upper surface of the first sandwiching portion 17A, It can be provided by a method of bonding a thermosetting resin formed into a frame shape.

According to the present embodiment having the above-described configuration, the following operational effects are achieved.
In the liquid crystal display device 10 of the present embodiment, when the temperature of the polarizing plates 110 and 111 rises, the protective film 110A expands outward along with the polarizer 110B in the polarizing plate 110 on the front side of the liquid crystal panel 11. In the polarizing plate 111 disposed on the back side of the liquid crystal panel 11, the outer peripheral edge of the protective film 111 </ b> A comes into contact with the suppressing member 31 provided adjacent to the end surface of the polarizing plate 111 and the expansion is suppressed.

In the present embodiment, of the end surfaces of the polarizing plate 111 having the bonded polarizer 112 formed by connecting the plurality of polarizers 111B, the end surface that faces the surface 112A (bonded surface 112A) that connects the plurality of polarizers 111B. Since the suppressing member 31 that suppresses the expansion of the protective film 111A is provided at a position adjacent to the protective film 111A, it is possible to suppress the protective film 111A that covers the surface of the bonded polarizer 112 from expanding outward. Therefore, according to the present embodiment, since the polarizer constituting the bonded polarizer 112 can be prevented from moving outward by suppressing the expansion of the protective film 111A, the bonded polarizer 112 is configured. It is possible to prevent a gap from being generated between the polarizers 111 </ b> B (bonding surface 112).
In this embodiment, since the suppressing member 31 is provided along the entire circumference of the end face of the polarizing plate 111 having the bonded polarizer 112, the expansion of the protective film 111A is caused to the entire circumference of the end face of the polarizing plate 111. Is particularly preferable.

  By the way, in order to obtain the effect of the present invention, for example, the glass substrates 11 a and 11 b of the liquid crystal panel 11, the bezel 13 that holds the liquid crystal panel 11, and the end face of the polarizing plate 111 having the bonded polarizer 112 such as the frame 17 are close. It is preferable to provide the restraining member 31 on the arranged member. Of these members, if the suppressing member 31 is provided on the surface of the glass substrates 11a and 11b of the liquid crystal panel 11, there is a concern that repair work may be hindered when the liquid crystal panel 11 has a defect. However, in the present embodiment, since the suppressing member 31 is provided on the frame 17, it does not hinder repair when a failure occurs in the liquid crystal panel 11.

Moreover, according to this embodiment, since the suppressing member 31 is provided also as the buffer member 30, it is not necessary to provide the buffer member 30 separately.
Furthermore, according to the present embodiment, the polarizing plate 110 that does not have the bonded polarizer 112 is disposed on the front side (display surface side) of the liquid crystal panel 11, and the polarizing plate 111 that has the bonded polarizer 112 is disposed on the back side. Therefore, the bonding surface 112A is not conspicuous.

  In addition, in the present embodiment, the frame 17 includes the first holding portion 17A that holds the liquid crystal panel 11 between the bezel 13 and the optical member 16 disposed on the back side of the liquid crystal panel 11. The second holding part 17B is provided. Therefore, according to this embodiment, since the member (frame 17) having two or more functions is provided, the number of parts can be reduced.

<Embodiment 2>
A second embodiment of the present invention will be described with reference to FIGS. The present embodiment is different from the first embodiment in that the polarizing plate 110 disposed on the front side of the liquid crystal panel 11 includes the bonded polarizer 112 and the suppressing member 31 is provided not on the frame 17 but on the bezel 13. A duplicate description of the same structure, operation, and effect as in the first embodiment will be omitted.
In the present embodiment, in the polarizing plate 111 disposed on the back side of the liquid crystal panel 11, one protective film 111A is attached to both surfaces of one rectangular polarizer 111B. On the other hand, in the polarizing plate 110 arranged on the front side of the liquid crystal panel 11, as shown in FIG. 7, two rectangular polarizers 110B are joined together at the end face to form a single bonded polarizer 112. One protective film 110 </ b> A is attached to each side of the bonded polarizer 112.
A buffer member 30 is provided between the sandwiching portion 17A of the frame 17 and the peripheral region 11c of the glass substrate 11a disposed on the back side of the liquid crystal panel 11.

As shown in FIG. 6, the suppressing member 31 is provided between the surface of the bezel 13 on the liquid crystal panel 11 side and the peripheral region 11 d of the front glass substrate 11 b of the liquid crystal panel 11. Also, it has a function as a buffer member 30 that alleviates the collision between the bezel 13 and the glass substrate 11b.
The suppressing member 31 has a frame shape along the outer peripheral edge of the polarizing plate 110 having the bonded polarizer 112, and is provided adjacent to the polarizing plate 110. Therefore, also in the present embodiment, as in the first embodiment, an effect of preventing a gap from being generated between the polarizers 110 </ b> B constituting the bonded polarizer 112 can be obtained.
Further, in the present embodiment, since the suppressing member 31 is provided on the bezel 13, similarly to the first embodiment, the present embodiment also has an effect that does not hinder the repair when a failure occurs in the liquid crystal panel 11. It is done.

<Embodiment 3>
A third embodiment of the present invention will be described with reference to FIGS. The present embodiment is different from the first embodiment in that the two polarizing plates 110 and 111 both have the bonded polarizer 112 and the suppressing member 31 is provided on the frame 17 and the bezel 13. A duplicate description of the same structure, operation, and effect as in the first embodiment will be omitted.
In the polarizing plate 110 arranged on the front side of the liquid crystal panel 11, as shown in FIG. 10, four rectangular polarizers 110B are joined together at the end face to form one bonded polarizer 112, and the bonded polarized light. One protective film 110 </ b> A is attached to each side of the child 112. The same applies to the polarizing plate 111 disposed on the back surface of the liquid crystal panel 11.

As shown in FIGS. 8 and 9, the bezel 13 in contact with the polarizing plate 110 on the front side of the liquid crystal panel 11 has a glass substrate 11b arranged on the front side of the liquid crystal panel 11 as shown in FIGS. A restraining member 31 that also serves as the buffer member 30 is provided between the peripheral region 11d and the peripheral region 11d. The suppressing member 31 has a frame shape along the outer peripheral edge of the polarizing plate 110 on the front side of the liquid crystal panel 11 having the bonded polarizer 112, and is provided adjacent to the polarizing plate 110.
A restraining member 31 that also serves as the buffer member 30 is provided between the sandwiching portion 17A of the frame 17 and the peripheral region 11c of the glass substrate 11a disposed on the back side of the liquid crystal panel 11. The suppressing member 31 has a frame shape along the outer peripheral edge of the polarizing plate 111 on the back side of the liquid crystal panel 11 having the bonded polarizer 112, and is provided adjacent to the polarizing plate 111.
Therefore, also in the present embodiment, as in the first embodiment, an effect of preventing a gap from being generated between the polarizers 110B and 111B constituting the bonded polarizer 112 can be obtained.
Further, in the present embodiment, since the suppressing member 31 is provided on the bezel 13 and the frame 17, similarly to the first embodiment, there is an effect that the repair is not hindered when a failure occurs in the liquid crystal panel 11.

<Embodiment 4>
A fourth embodiment of the present invention will be described with reference to FIGS. The present embodiment is different from the first embodiment in that the two polarizing plates 110 and 111 both have a bonded polarizer 112 and the suppression member 31 is provided on each of the glass substrates 11a and 11b. A duplicate description of the same structure, operation, and effect as in the first embodiment will be omitted.
The configurations of the polarizing plates 110 and 111 arranged on the front side and the back side of the liquid crystal panel 11 are the same as those of the polarizing plates 110 and 111 of the third embodiment.
In the present embodiment, the peripheral region 11d of the glass substrate 11b on which the polarizing plate 110 on the front side of the liquid crystal panel 11 is disposed, and the peripheral edge of the glass substrate 11a on which the polarizing plate 111 on the back side of the liquid crystal panel 11 is disposed. In the region 11c, a suppressing member 31 made of a thermosetting resin is provided.

The two suppressing members 31 are provided by applying a thermosetting resin so as to form a frame shape along the end surfaces constituting the outer peripheral edges of the corresponding polarizing plates 110 and 111, respectively. Of the two suppression members 31, the suppression member 31 provided corresponding to the polarizing plate 111 on the back side of the liquid crystal panel 11 is provided on the inner surface of the first sandwiching portion 17 </ b> A of the frame 17 and the end surface of the polarizing plate 111. It is provided to touch.
Therefore, also in the present embodiment, as in the first embodiment, an effect of preventing a gap from being generated between the polarizers 110B and 111B constituting the bonded polarizer 112 can be obtained.

  Furthermore, according to the present embodiment, since the suppressing member 31 is provided on the surfaces of the glass substrates 11a and 11b on which the polarizing plates 111 and 110 are disposed, the end surfaces of the polarizing plates 110 and 111 having the bonded polarizer 112 and the end faces are surely provided. It is preferable because the suppressing member 31 can be provided at a position in contact with the polarizing plate 110 and the polarizing plates 110 and 111 are positioned by the suppressing member 31.

<Other embodiments>
The present invention is not limited to the above-described embodiments. For example, the following embodiments are also included in the technical scope of the present invention.
(1) In each of the above embodiments, the frame-shaped suppressing member 31 along the entire circumference of the end faces of the polarizing plates 110 and 111 having the bonded polarizer 112 is shown. However, the suppressing member 31 includes the bonded polarizer 112. The effect of the present invention can be obtained as long as it is provided at a position adjacent to at least the end surface facing the bonding surface 112A among the end surfaces of the polarizing plates 110 and 111. Therefore, the suppression member 31 may be provided only at a position adjacent to the end surface facing the bonding surface 112A among the end surfaces of the polarizing plates 110 and 111 having the bonding polarizer 112, or the protrusion-shaped suppression member 31 is bonded to the bonding polarization. You may provide for every end surface of the polarizing plates 110 and 111 which have the element | child 112. FIG.

  (2) In each of the above-described embodiments, the polarizing plates 110 and 111 having the configuration in which the protective films 110A and 111A are attached to both surfaces of the polarizers 110B and 111B, respectively, are shown. A polarizing plate having a configuration in which the protective films 110A and 111A are attached to only one of the two surfaces may be used.

  (3) In the above embodiments 3 and 4, the two polarizing plates 110 and 111 each have four polarizers 110B and 111B, respectively, but the polarizers of the two polarizing plates 110 and 111 are shown. The numbers 110B and 111B may be different. For example, even if there are two polarizers 110B constituting the polarizing plate 110 arranged on the front side of the liquid crystal panel 11 and four polarizers 111B constituting the polarizing plate 111 arranged on the back side of the liquid crystal panel 11 It may be good or vice versa. In the polarizing plate 111 arranged on the back side of the liquid crystal panel 11, it is preferable that the number of the polarizers 111B is small because the number of the bonding surfaces 112A is small.

(4) In each of the first and second embodiments, the suppression member 31 also serves as the buffer member 30, but the suppression member 31 and the buffer member 30 may be provided separately.
(5) In the fourth embodiment, the suppression member 31 provided by applying a thermosetting resin on the glass substrates 11a and 11b is shown. However, the suppression member 31 made of a thermosetting resin formed into a frame shape is made of glass. You may affix on the board | substrates 11a and 11b.
(6) In the fourth embodiment, the buffer member 30 is not provided. However, a frame between the bezel 13 and the suppressing member 31 provided corresponding to the polarizing plate 110 on the front side of the liquid crystal panel 11 is provided. The buffer member 30 may be provided on one or both of the 17 first holding portions 17A and the glass substrate 11a on the back side of the liquid crystal panel 11.

1 is an exploded perspective view showing a schematic configuration of a television receiver according to Embodiment 1. FIG. An exploded perspective view showing a schematic configuration of a liquid crystal display device provided in the television receiver Sectional drawing which shows the cross-sectional structure along the long side direction of a liquid crystal display device FIG. 3 is an enlarged sectional view of a part of FIG. The perspective view explaining the laminated structure of the polarizing plate which has a joining polarizer Sectional drawing which expanded a part of sectional structure along the long side direction of the liquid crystal display device with which the television receiver which concerns on Embodiment 2 was equipped. The perspective view explaining the laminated structure of the polarizing plate which has a joining polarizer Sectional drawing which expanded a part of sectional structure along the long side direction of the liquid crystal display device with which the television receiver which concerns on Embodiment 3 was equipped. Sectional drawing which shows the cross-sectional structure along the short side direction of a liquid crystal display device The perspective view explaining the laminated structure of the polarizing plate which has a joining polarizer Sectional drawing which expanded a part of sectional structure along the long side direction of the liquid crystal display device with which the television receiver which concerns on Embodiment 4 was equipped. Sectional drawing which expanded a part of cross-sectional structure along the short side direction of a liquid crystal display device

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 ... Liquid crystal display device 11 ... Liquid crystal panel 31 ... Inhibition member 110, 111 ... Polarizing plate 110A, 111A ... Protective film 110B, 111B ... Polarizer 112 ... Bonding polarizer 112A ... Bonding surface

Claims (11)

A liquid crystal module comprising a liquid crystal panel with polarizing plates on both sides,
Each of the two polarizing plates disposed on both surfaces of the liquid crystal panel has a polarizer and a protective film covering the surface of the polarizer,
Of the two polarizing plates, at least one polarizing plate has a bonded polarizer in which a plurality of polarizers are bonded to each other at the end face,
Of the end faces of the polarizing plate having the bonded polarizer, at least at a position adjacent to the end face facing the bonded face where the plurality of polarizers are bonded, the thermal expansion coefficient is lower than that of the protective film, and the protective film expands. A liquid crystal module comprising a suppressing member that suppresses the above. The liquid crystal module according to claim 1, wherein the suppressing member is provided corresponding to each end face of the polarizing plate having the bonded polarizer. The liquid crystal module according to claim 1, wherein the suppressing member is provided along the entire circumference of the end face of the polarizing plate having the bonded polarizer. A first holding member that is disposed outside the liquid crystal panel and integrally holds the liquid crystal panel and an illumination device that emits light to the liquid crystal panel;
Of the two polarizing plates disposed on both surfaces of the liquid crystal panel, at least the polarizing plate disposed on the first holding member side has a bonded polarizer,
4. The liquid crystal module according to claim 1, wherein the suppressing member is provided on the liquid crystal panel side of the first holding member. 5. A second holding member for holding the liquid crystal panel sandwiched between the first holding member and
Of the two polarizing plates disposed on both surfaces of the liquid crystal panel, the polarizing plate disposed on at least the second holding member side has a bonded polarizer,
The liquid crystal module according to claim 4, wherein the suppressing member is provided on a contact surface of the second holding member with the liquid crystal panel. 6. A liquid crystal module comprising the suppressing member according to claim 4 serving also as a buffer member. The liquid crystal panel is formed by sealing liquid crystal between a pair of substrates,
The liquid crystal module according to claim 1, wherein a suppression member made of a thermosetting resin is provided on a surface of the substrate. Of the two polarizing plates arranged on both sides of the liquid crystal panel, the number of polarizers of the polarizing plate arranged on the display surface side of the liquid crystal panel is arranged on the side opposite to the display surface of the liquid crystal panel. The liquid crystal module according to claim 1, wherein the number of polarizers included in the polarizing plate is smaller. The second holding member includes a first holding portion that holds the liquid crystal panel between the first holding member and an optical element disposed on the opposite side of the display surface of the liquid crystal panel. The liquid crystal module according to claim 8, further comprising a second sandwiching portion that sandwiches the member. A liquid crystal display device comprising the liquid crystal module according to claim 1 and an illumination device. A television receiver comprising the liquid crystal display device according to claim 10.

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