JP2010078887A - Liquid crystal display - Google Patents

Abstract

An object of the present invention is to suppress the influence on structural elements whose optical characteristics are likely to deteriorate due to stress, and to improve the durability of display performance.
A liquid crystal panel including a liquid crystal layer and a pair of rectangular transparent substrates sandwiching the liquid crystal layer, each having a polarizing plate attached to an observation side surface and a back surface opposite to the liquid crystal cell, and the liquid crystal panel In a liquid crystal display device 100 including a panel frame 21 that has a panel mounting portion that supports an edge of the liquid crystal cell and is formed in a frame shape, a polarizing plate that has a pasting portion protruding from either side of the liquid crystal cell Is provided on the observation surface side of the liquid crystal cell, and the liquid crystal panel is assembled to the panel frame 21 in a state in which the pasting portion is fixed to the panel frame 21.
[Selection] Figure 1

Description

  The present invention relates to a liquid crystal display device in which a liquid crystal panel to which a polarizing plate is attached is assembled to a panel frame.

  In recent liquid crystal display devices, an optical compensation sheet (also referred to as a retardation film) is disposed between the polarizing film and the liquid crystal cell, thereby correcting the polarization state and widening the viewing angle to improve display quality. Yes. However, depending on the use conditions, an unexpected phase difference may occur at the end of the liquid crystal display device due to distortion generated in the polarizing film according to the environmental temperature and humidity. Due to this unexpected phase difference, an image defect such as a frame-like light leakage (an increase in transmittance at the end of the liquid crystal display device) occurs during black display of the liquid crystal display device. This image defect is known to be because the polarizing film expands and contracts due to a change in environmental temperature and humidity, and this deformation causes distortion in an optical sheet such as an optical compensation sheet and a transparent protective film, resulting in a change in optical characteristics. For this reason, in addition to suppressing changes in temperature and humidity, countermeasures that suppress the entry and exit of moisture in the polarizing film are regarded as effective.

  A liquid crystal display device disclosed in, for example, Patent Document 1 in which such measures are taken is a liquid crystal display device including a liquid crystal display panel whose front side is exposed to the outside and a back chamber that closes the back side of the liquid crystal display panel. By providing a ventilation hole that connects the room and the outside air and a moisture-permeable film that closes the ventilation hole, the difference in expansion and contraction due to the humidity difference between the polarizing plates on the front and back of the liquid crystal display panel is suppressed, and the display quality is degraded due to the expansion and contraction difference I'm trying to prevent it.

However, the conventional liquid crystal display device has a polarizing structure smaller than the size of the liquid crystal panel attached to the liquid crystal panel to form a bonded structure. For example, when shrinkage or the like occurs on the surface of the liquid crystal panel due to a difference in expansion and contraction of the plate, there is a possibility that the influence on a component (for example, an optical compensation sheet) whose optical characteristics easily change due to stress cannot be suppressed. In addition, since the conventional liquid crystal panel support structure supports the liquid crystal panel on the same plane, if the shape of the liquid crystal panel changes according to the environment in the housing, the liquid crystal panel and the panel frame may hit each other. there were. In such a contact, if the liquid crystal panel is supported on the same plane, the deformation of the liquid crystal panel is corrected, it acts as an internal stress on the polarizing plate and the bonded structure of the liquid crystal panel, and adversely affects the optical compensation sheet. There was a risk of effect.
JP 2007-71987

  The present invention has been made in view of the above situation, and provides a liquid crystal display device capable of suppressing the influence on structural elements whose optical characteristics are likely to change due to stress, and therefore aims to improve the durability of display performance. To do.

The present invention has the following configuration.
(1) a liquid crystal panel in which a polarizing plate is attached to the observation side surface of the liquid crystal cell including a liquid crystal layer and a pair of rectangular transparent substrates sandwiching the liquid crystal layer, and a back surface opposite to the liquid crystal cell; A panel frame formed in a frame shape having a panel placement portion for supporting an edge, and a liquid crystal display device comprising:
The polarizing plate provided on the observation surface side of the liquid crystal cell has a pasting margin that protrudes from either side of the liquid crystal cell,
A liquid crystal display device in which the liquid crystal panel is assembled to the panel frame in a state where the pasting portion is fixed to the panel frame.

  According to this liquid crystal display device, a pair of bonding margins is extended from the polarizing plate attached to the observation surface side of the liquid crystal cell, and both ends of the polarizing plate are fixed to the panel frame via the pair of bonding margins. The contraction force when the polarizing plate is about to contract is directly supported by the panel frame. Thereby, the shrinkage stress which acts on the bonding structure of the polarizing plate and the liquid crystal cell is reduced, and in particular, the influence on the component (for example, the optical compensation sheet) whose optical characteristics deteriorate due to the stress is eliminated.

(2) The liquid crystal display device according to (1),
The liquid crystal display device in which the pasting part is formed on the opposite side along the longitudinal direction of the liquid crystal panel.

  According to this liquid crystal display device, in the rectangular polarizing plate, when the contraction rate in the direction parallel to the short side is large, both ends of the contraction direction, that is, the pair of long sides are supported on the panel frame side, Shrinkage of the polarizing plate is suppressed. In addition, it is possible to support the liquid crystal panel in which the electrical component is protruded on the short side with a long side portion that can avoid interference with the electrical component.

(3) The liquid crystal display device according to (1),
The liquid crystal display device in which the pasting part is formed on the opposite side along the direction orthogonal to the longitudinal direction of the liquid crystal panel.

  According to this liquid crystal display device, in the rectangular polarizing plate, when the contraction rate in the direction parallel to the long sides is large, both ends of the contraction direction, that is, the pair of short sides are supported on the panel frame side, Shrinkage of the polarizing plate is suppressed. In addition, it is possible to support the liquid crystal panel that protrudes the electrical component on the long side with the short side portion that can avoid interference with the electrical component.

(4) The liquid crystal display device according to any one of (1) to (3),
The liquid crystal display device in which the pasting portion is formed only at a corner along the opposite side of the liquid crystal panel.

  According to this liquid crystal display device, it is possible to support the liquid crystal panel that protrudes the electrical component on both the long side and the short side at the corners where interference with the electrical component can be avoided.

(5) The liquid crystal display device according to any one of (1) to (4),
The liquid crystal display device in which the pasting portion is stuck to a side wall surface of the panel frame orthogonal to the front and back surfaces of the liquid crystal panel.

  According to this liquid crystal display device, the pasting portion extending in parallel with the surface of the liquid crystal panel is fixed at the side wall surface after being bent at the edge portion sandwiched between the surface of the liquid crystal panel and the side wall surface, and is generated at the edge portion. Friction effectively contributes to support a large tensile load with a relatively small fixed strength.

(6) The liquid crystal display device according to any one of (1) to (5),
A liquid crystal display in which the panel mounting portion is provided on either side of the panel frame formed in the frame shape, and a notch is formed on the other side to prevent contact with the edge of the liquid crystal panel apparatus.

  According to this liquid crystal display device, in consideration of deformation of the liquid crystal panel, a notch is recessed in the panel frame in advance, and the influence of warpage of the liquid crystal panel itself is reduced or eliminated. That is, even if the liquid crystal panel is bent and deformed so as to protrude to the back due to the contraction of the polarizing plate, the edge of the liquid crystal panel on the curved side enters the notch and does not interfere with the panel frame. This reduces the occurrence of internal stress in the bonding structure caused by the reaction force from the panel frame side, which occurs in the conventional structure where the back of the liquid crystal panel is in close contact with the panel frame and prevents shrinkage deformation (corrected) Is done.

(7) The liquid crystal display device according to (6),
The liquid crystal display device in which the notch includes an arcuate depression.

  According to this liquid crystal display device, the panel frame is cut out in a shape along the curved shape in which the liquid crystal panel protrudes to the back surface, the cutout loss is small, and the strength of the panel frame is not reduced.

(8) The liquid crystal display device according to (6),
The liquid crystal display device in which the notch includes a rectangular notch.

  According to this liquid crystal display device, the shape of the notch is simplified, and the processing of the notch is facilitated.

(9) The liquid crystal display device according to any one of (6) to (8),
A liquid crystal display device, wherein a cutout depth in a direction perpendicular to the liquid crystal panel surface by the cutout portion is at least 2 mm.

  According to this liquid crystal display device, since the depth of the notch is 2 mm or more, interference due to deformation occurring in the liquid crystal panel can be reliably avoided.

  According to the liquid crystal display device according to the present invention, the polarizing plate having the pasting portion protruding from either side of the liquid crystal cell is provided on the observation surface side of the liquid crystal cell, and the pasting portion is fixed to the panel frame. Since the liquid crystal panel is assembled to the panel frame, the contraction force when the polarizing plate contracts is supported by the panel frame, and in particular, the influence on components (such as optical compensation sheets) whose optical characteristics are likely to deteriorate due to stress is suppressed. The durability of the display performance can be improved.

Hereinafter, preferred embodiments of a liquid crystal display device will be described with reference to the drawings.
FIG. 1 is a front view showing a liquid crystal display device with a liquid crystal panel omitted for explaining an embodiment of the present invention, FIG. 2 is a cross-sectional view taken along the line AA in FIG. 1, and FIG. FIG.
As shown in FIGS. 1 and 2, the liquid crystal display device 100 has a liquid crystal panel 15 and a panel mounting portion 19 that supports the edge 17 of the liquid crystal panel 15, and is formed in a frame shape surrounding the liquid crystal panel 15. A panel frame 21 is provided as a main configuration. Although not shown, the liquid crystal panel 15 has polarizing plates on the observation side surface 11a of the liquid crystal cell 11 including a liquid crystal layer and a pair of rectangular transparent substrates sandwiching the liquid crystal layer, and on the back surface 11b on the opposite side. It is configured with crossed Nicols. The liquid crystal panel 15 may be in any of TN mode, STN mode, VA mode, IPS mode, OCB mode, ECB mode, and the like.

  The panel frame 21 is a frame-shaped member attached to the upper surface opening of the bottomed box-shaped housing 23. In this panel frame 21, the panel mounting portion 19 is provided on either side of the frame shape, and a notch portion 37 is formed on the other side to prevent contact with the edge portion 35 of the liquid crystal panel 15. . In this configuration, the notch 37 is formed in an arcuate depression (round shape). The round shape is for making the shape along the bent shape of the liquid crystal panel 15 in order to avoid contact with the panel frame 21 when the liquid crystal panel 15 is deformed. Further, the panel frame 21 is cut out in a shape along a curved shape (round shape) protruding to the back surface, so that the cutout loss is small and the panel frame 21 is not reduced in strength.

  The notch depth Da perpendicular to the surface of the liquid crystal panel 15 by the notch 37 has a depth of at least 2 mm. Thereby, interference due to deformation occurring in the liquid crystal panel 15 is reliably avoided, and a decrease in the strength of the panel frame 21 when the depth of the notch 37 exceeds 2 mm is suppressed.

  The housing 23 forms a back chamber 25 on the back side of the liquid crystal panel 15 by closing the top opening with the liquid crystal panel 15 supported by the panel frame 21. A plurality of cold cathode fluorescent tubes 27 are accommodated in the back chamber 25 in parallel. That is, a direct type backlight unit is configured.

  The direct type backlight unit includes a plurality of cold cathode fluorescent tubes 27 arranged in parallel, a reflection plate provided on the back side of the cold cathode fluorescent tubes 27, a light diffusion plate provided on the light emitting surface side, although not shown. A combination of One to several triangular roof-like prism sheets may be further disposed on the upper surface of the light diffusion plate. The liquid crystal display device 100 can increase the number of cold cathode fluorescent tubes 27 and easily increase the luminance of the light emitting surface by adopting a direct type backlight unit.

FIG. 4 is a perspective view showing the assembly procedure of the liquid crystal display device shown in FIG. 1 in (a) and (b).
The polarizing plate 13 is a multilayer laminate including a polarizer, and various forms can be adopted. For example, the polarizing plate 13 includes a pair of protective films sandwiching the polarizer, and an optical compensation sheet on the transparent substrate side of the liquid crystal cell 11. A configuration in which is attached can be illustrated. That is, the polarizing plate 13 has a structure in which at least four layers are stacked. The polarizing plate 13 provided on the observation-side surface 11 a of the liquid crystal cell 11 has a pasting margin 29 that protrudes from either side of the liquid crystal cell 11.

  The pasting portion 29 is stuck and fixed to the side wall surface 31 of the panel frame 21 orthogonal to the front and back surfaces of the liquid crystal panel 15. That is, the liquid crystal panel 15 is assembled to the panel frame 21 with the pasting portion 29 fixed. The bonding margin 29 extending parallel to the surface of the liquid crystal panel 15 is fixed to the side wall surface 31 after being bent at a right angle at an edge portion 33 sandwiched between the surface of the liquid crystal panel 15 and the side wall surface 31. Thereby, the friction which arises in the edge part 33 contributes effectively, and a big tensile load can be supported with comparatively small fixed strength.

  As shown in FIG. 4, the polarizing plate 13 on the observation-side surface 11 a side of the liquid crystal panel 15 is cut long in a direction parallel to the stretching direction (which is the shrinking direction) and extends from the opposing short sides of the liquid crystal panel 15. Let me stick. An adhesive material layer (not shown) is provided on the lower surface of the polarizing plate 13, that is, the surface on the optical compensation sheet side, and the polarizing plate 13 is bonded and fixed to the liquid crystal cell 11 by this adhesive material layer.

  Conventionally, the liquid crystal panel 15 and the panel frame 21 were simply overlapped, but in this configuration, the liquid crystal panel 15 is held by the panel frame 21 via the polarizing plate 13. The polarizing plate 13 is first attached to the liquid crystal cell 11, and then the extended pasting margin 29 is bonded and fixed to the panel frame 21 when the frame is assembled. The height h of the end abutting portion 38 protruding from the panel mounting portion 19 of the panel frame 21 is preferably the same as the thickness of the liquid crystal panel 15 and may be equal to or less than the thickness of the liquid crystal panel 15. Further, as described above, the depth Da of the cutout portion 37 of the panel frame 21 is set to at least 2 mm, thereby preventing contact due to warpage in all cases where the size of the liquid crystal panel 15 is 19 to 37 inches. . In the illustrated example, the end butting portion projecting from the panel mounting portion 19 with respect to the side of the panel frame 21 on the side of the notch portion 37 is omitted. It is good also as a structure in which the edge part butting part was provided in this and the edge part butting part 38 was formed in the perimeter of the liquid crystal panel 15. FIG.

Next, the operation of the liquid crystal panel 15 in which the bonding margin 29 of the polarizing plate 13 is fixed to the panel frame 21 will be described.
FIG. 5 schematically shows the relationship between the contraction force when the polarizing plate contracts and the drag corresponding to the contraction force.
As the polarizer contracts, if the polarizing plate 13 tries to contract in a state in which the protective film and the optical compensation sheet are contracted, the pasting portion 29 at both ends of the polarizing plate 13 is fixed to the panel frame 21. Therefore, a contraction force F is generated in the polarizing plate 13. The contraction force F can be decomposed into a frame side drag Ff acting on the panel frame 21 and a substrate side drag Fs acting on the transparent substrate of the liquid crystal panel 15 (adhesion partner of the polarizing plate 13). Previously, all of the contraction force F was the substrate side drag Fs, and the liquid crystal panel 15 was warped. However, in this configuration, the substrate side drag Fs is also shared by the panel frame 21 side. Is relatively small. That is, the contraction force F of the polarizing plate 13 is shared by the panel frame 21, and the force acting on the liquid crystal panel 15 is reduced.

  In a state where the contraction force F is shared by the panel frame 21, the contraction amount (contraction amount) of the polarizing plate 13 is suppressed and becomes a small value. That is, the amount of shrinkage is reduced, and the protective film and the optical compensation sheet are less likely to shrink in accordance with the shrinkage of the polarizer, and the optical compensation sheet has a relative stress between each layer. This is less likely to occur. On the other hand, a polarizer that contracts by itself generates a large tensile internal stress. The internal stress generated in the polarizer does not particularly affect the optical characteristics such as retardation. This is because the optical characteristics change when the internal stress of the protective film or the optical compensation sheet itself increases.

  Conventionally, the liquid crystal panel 15 is warped due to the contraction of the polarizing plate 13, and the polarizer is freely contracted, and the contraction margin is reduced to the optical compensation sheet. Therefore, compression internal stress acts on the optical compensation sheet. It was. However, in this configuration, since the optical compensatory sheet is prevented from contracting the polarizer by the panel frame 21, the distortion of the optical compensatory sheet is reduced, and as a result, the external force acting on the optical compensatory sheet itself is reduced. That is, the occurrence of stress and deformation is reduced. Therefore, the change in optical characteristics is reduced.

  As described above, in the liquid crystal display device 100, both ends of the polarizing plate 13 are fixed to the panel frame 21 via the pair of bonding margins 29, and the contraction force when the polarizing plate 13 tries to contract is directly applied to the panel frame 21. Supported. Thereby, the shrinkage stress which acts on the bonding structure of the polarizing plate 13 and the liquid crystal cell 11 is reduced, and in particular, the influence on the constituent elements (for example, a protective film and an optical compensation sheet) whose optical properties deteriorate due to the stress is eliminated. .

Next, the effect | action which provided the notch part 37 in the panel frame 21 is demonstrated.
FIG. 6 is a diagram in the case where the contraction further exceeds the contraction amount of FIG.
The liquid crystal display device 100 can bear a certain amount of shrinkage, but if the humidity difference becomes larger than a predetermined value, the liquid crystal panel 15 is also burdened, resulting in warping. At that time, if the liquid crystal panel 15 is warped, but is fixed (corrected) flatly by the panel frame 21, a large internal stress is generated here. In such a case, rather, the internal stress can be reduced by flexing the liquid crystal panel 15 freely. That is, the stress of the polarizer is reduced by converting the stress of the polarizer into strain.

  When the liquid crystal panel 15 comes into contact with the panel frame 21, stress concentration occurs and the optical characteristics change locally. Therefore, in the liquid crystal display device 100, the notch 37 is recessed in the panel frame 21 in consideration of the deformation of the liquid crystal panel 15 in advance, and the influence of the warp of the liquid crystal panel itself is reduced or eliminated. That is, even if the liquid crystal panel 15 is curved and deformed so as to protrude to the back side due to the contraction of the polarizing plate 13, the edge 35 on the curved side of the liquid crystal panel 15 enters the notch 37 and enters the panel frame 21. Does not cause any interference. Thereby, generation | occurrence | production of the internal stress in the bonding structure resulting from the reaction force from the panel frame side that a liquid crystal panel back surface closely_contact | adheres to the panel frame 21, and contraction deformation is prevented (corrected) is reduced. The

FIG. 7 is a plan view showing variations of the pasting allowance in (a), (b), and (c).
The pasting allowance 29 can be appropriately changed depending on the arrangement position of the electrical component 39 such as the drive circuit of the liquid crystal panel 15 and the connection terminal portion 41. For example, as shown in FIG. 7A, the pasting margin 29 can be formed on the opposite side along the direction orthogonal to the longitudinal direction of the liquid crystal panel 15. In the rectangular polarizing plate 13, when the contraction rate in the direction parallel to the long side is large, both ends of the contracting direction, that is, the pair of short sides are supported on the panel frame 21 side, so that the polarizing plate 13 Shrinkage is suppressed. Further, for example, the liquid crystal panel 15 that projects the electrical component 39 on the long side can be supported at the short side where interference with the electrical component 39 can be avoided.

  As shown in FIG. 7B, the pasting margin 29 can be formed only at the corner along the opposite side of the liquid crystal panel 15. For example, the liquid crystal panel 15 that projects the electrical component 39 on both the long side and the short side can be supported at corners where interference with the electrical component 39 can be avoided.

  As shown in FIG. 7C, the pasting margin 29 may be formed on the opposite side along the longitudinal direction of the liquid crystal panel 15. In the rectangular polarizing plate 13, when the shrinkage rate in the direction parallel to the short side is large, both ends of the shrinking direction, that is, the pair of long sides are supported on the panel frame 21 side. Shrinkage is suppressed. In addition, for example, the liquid crystal panel 15 that projects the electrical component 39 on the short side can be supported on the long side where interference with the electrical component 39 can be avoided.

Next, a modified example of the panel frame will be described.
8 is an exploded perspective view of a modified example in which the pasting portion is fixed to the notch portion side of the panel frame, FIG. 9 is an assembled external perspective view of FIG. 8, and FIG. It is sectional drawing which showed a) and QQ cross-section arrow in (b).
As shown in FIG. 8, in the liquid crystal display device 100 </ b> A, the pasting margin 29 may be fixed to the notch 37 side of the panel frame 21. In the above-described liquid crystal display device 100 shown in FIG. 4, the bonding margin 29 is fixed to the side wall surface 31 of the panel frame 21. In this modification, the bonding margin 29 is fixed to the other side wall 43 of the panel frame 21. Is done. This configuration is suitable when the polarizing plate 13a on the observation side surface 11a side is in the contraction direction in the direction orthogonal to the longitudinal direction.

  In this modification, since the polarizing plate 13a is stuck to the panel frame 21 in a direction orthogonal to the shrinking direction, the shrinkage of the polarizing plate 13a on the observation-side surface 11a side causes more than the case shown in FIG. It becomes easy to generate the curvature of the liquid crystal panel 15. However, even if the liquid crystal panel 15 is warped, the liquid crystal panel 15 does not come into contact with the panel frame 21 by processing the panel frame 21 in a round shape corresponding to the warp. In this case, the notch depth Db is preferably at least 2 mm.

FIG. 11 is a cross-sectional view showing variations of the notch portion in (a) and (b).
The cutout portion 37 </ b> A formed in the panel frame 21 may have a rectangular shape shown in FIG. Further, as shown in FIG. 11 (b), an open portion 45 from which the central portion is removed may be provided. In this case, the end abutting portion 38 shown in FIG. 4 is formed on the entire periphery of the liquid crystal panel 15, and the panel frame 21 is maintained in a frame shape. According to the cutout portion 37 </ b> A having such a shape, the cutout portion shape is simplified and processing is facilitated. In the case where the opening 45 is formed, interference between the rear surface of the deformed liquid crystal panel 15 and the panel frame 21 can be reliably prevented.

FIG. 12 is an enlarged cross-sectional view of a main part showing variations of the pasting part fixing structure in (a), (b), and (c).
In the above embodiment, the pasting allowance 29 is attached to the side wall surface 31. However, as shown in FIG. 12A, as a more secure fixing structure, the fixing pin 47 penetrating the pasting allowance 29 is used. You may fix to the side wall surface 31. FIG. Further, as shown in FIG. 12B, the fixing position of the pasting margin 29 is not limited to the side wall surface 31, particularly when the fixing pin 47 is used. It may be 49. Further, the fixing pin 47 is not limited to a columnar shape but may be a plate-like plate. In that case, it is possible to easily fix the wide range evenly. Furthermore, as a structure considering assemblability, the pasting part 29 is wound around the casing 51, and the rectangular fixing frame 53 is fitted to the panel frame 21 from above so that the workability of attaching the polarizing plate 13 is good. You may do.

  Therefore, according to the liquid crystal display device 100, the polarizing plate 13 having the pasting margin 29 that protrudes from either side of the liquid crystal cell 11 is provided on the observation side surface 11a side of the liquid crystal cell 11, and this pasting margin 29 Since the liquid crystal cell 11 is assembled to the panel frame 21 in a state where the liquid crystal cell 11 is fixed to the panel frame 21, the contraction force when the polarizing plate 13 contracts is supported by the panel frame 21, and in particular, a component whose optical characteristics are likely to change due to stress. The influence on (for example, a protective film or an optical compensation sheet) can be suppressed, and the durability of display performance can be improved.

Next, the liquid crystal display devices according to the first, second, and third embodiments, which are similar to the configurations shown in FIGS. A comparative example of a standard structure manufactured by sticking to a panel frame without a notch and the result of luminance unevenness evaluation will be described.
Conditions for evaluating brightness unevenness Forced aging conditions: 60 ° C / RH 90% for 96 hours, then 60 ° C / Dry for 96 hours (backlit module)
Observation conditions: Completely dark room, standard bright room (average illuminance: 500 lux)

Luminance unevenness visual sensory evaluation / judgment criteria A: Brightness unevenness cannot be confirmed even in dark room observation or in bright room observation.
B: Luminance unevenness can be confirmed by careful observation only in dark room observation, but luminance unevenness cannot be confirmed by bright room observation.
C: Slight luminance unevenness can be confirmed only in dark room observation, but luminance unevenness cannot be confirmed in bright room observation.
D: Luminance unevenness can be clearly confirmed in dark room observation, but luminance unevenness cannot be confirmed in bright room observation.
E: Brightness unevenness can be confirmed both in dark room observation and in bright room observation.
The practically acceptable level was evaluated as A to C.

  As shown in Table 1, while the evaluation was E in the comparative example, Examples 1, 2, 3, and 4 were practically acceptable levels of A to C.

It is the front view which abbreviate | omitted and represented the liquid crystal panel of the liquid crystal display device for describing embodiment of this invention. It is an AA cross-sectional arrow view of FIG. It is a BB cross-sectional arrow view of FIG. FIG. 2 is a perspective view showing an assembly procedure of the liquid crystal display device shown in FIG. 1 in (a) and (b). It is sectional drawing explaining the stress when contraction arises in a polarizing plate. It is sectional drawing showing the positional relationship with a panel frame when a deformation | transformation arises in a polarizing plate. It is the top view which showed the variation of the sticking margin part to (a), (b), (c). It is a disassembled perspective view of the modification in which a pasting part is fixed to the notch part side of a panel frame. FIG. 9 is an assembled external perspective view of FIG. 8. It is sectional drawing which showed PP sectional arrow of FIG. 9 in (a), and QQ sectional arrow in (b). It is sectional drawing which showed the variation of a notch part to (a) and (b). It is the principal part expanded sectional view which showed the variation of the pasting part fixing structure to (a), (b), (c).

Explanation of symbols

DESCRIPTION OF SYMBOLS 11 Liquid crystal cell 11a Observation side surface 13 Polarizing plate 15 Liquid crystal panel 17 Edge part of liquid crystal panel 19 Panel mounting part 21 Panel frame 29 Pasting part 31 Side wall surface of panel frame orthogonal to the front and back surfaces of liquid crystal panel 37 Notch part 37A Rectangular cutout 100 Liquid crystal display device Da, Db Cutout depth

Claims (9)

A liquid crystal panel having a liquid crystal layer and a pair of rectangular transparent substrates sandwiching the liquid crystal layer, a liquid crystal panel having a polarizing plate attached to the observation side surface and the back surface opposite to the liquid crystal cell, and an edge of the liquid crystal panel A liquid crystal display device comprising a panel frame having a panel placement portion to support and formed in a frame shape,
The polarizing plate provided on the observation surface side of the liquid crystal cell has a pasting margin that protrudes from either side of the liquid crystal cell,
A liquid crystal display device in which the liquid crystal panel is assembled to the panel frame in a state where the pasting portion is fixed to the panel frame. The liquid crystal display device according to claim 1,
The liquid crystal display device in which the pasting part is formed on the opposite side along the longitudinal direction of the liquid crystal panel. The liquid crystal display device according to claim 1,
The liquid crystal display device in which the pasting part is formed on the opposite side along the direction orthogonal to the longitudinal direction of the liquid crystal panel. The liquid crystal display device according to any one of claims 1 to 3,
The liquid crystal display device in which the pasting portion is formed only at a corner along the opposite side of the liquid crystal panel. The liquid crystal display device according to any one of claims 1 to 4,
The liquid crystal display device in which the pasting portion is stuck to a side wall surface of the panel frame orthogonal to the front and back surfaces of the liquid crystal panel. A liquid crystal display device according to any one of claims 1 to 5,
A liquid crystal display in which the panel mounting portion is provided on either side of the panel frame formed in the frame shape, and a notch is formed on the other side to prevent contact with the edge of the liquid crystal panel apparatus. The liquid crystal display device according to claim 6,
The liquid crystal display device in which the notch includes an arcuate depression. The liquid crystal display device according to claim 6,
The liquid crystal display device in which the notch includes a rectangular notch. A liquid crystal display device according to any one of claims 6 to 8,
A liquid crystal display device, wherein a cutout depth in a direction perpendicular to the liquid crystal panel surface by the cutout portion is at least 2 mm.

Images