JP2005242047A - Liquid crystal display - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To reliably fix a liquid crystal panel in a holder for many years with high workability and no increase in the thickness of the module in a liquid crystal display having the liquid crystal panel housed in the holder. <P>SOLUTION: In a liquid crystal display having a liquid crystal panel 1 housed in a panel housing recess 41 of a holder 4, the fixing means of the liquid crystal panel 1 in the panel housing recess 41 is composed of combinations of latching pieces 221, 224 protruding outward like tongues from a part of at least one polarizing plate in two polarizing plates 21, 22 adhering to the liquid crystal panel 1 and latching pieces receptacles (e.g. slits) 48 to 51 formed in the panel housing recess 41. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a liquid crystal display device in which a liquid crystal panel is accommodated in a holder, and more particularly to a means for fixing the liquid crystal panel in the holder.

  When assembling a liquid crystal panel as a liquid crystal display device, a flexible substrate such as COF (Chip On Film) or TCP (Tape Carrier Package) is connected to the terminal portion of the liquid crystal panel, and then protected from an external impact such as dropping. It is stored in a holder made of synthetic resin.

  An example thereof will be described with reference to a plan view of FIG. 5 and a cross-sectional view of FIG. The liquid crystal panel 1 is formed by pressing the first and second transparent electrode substrates 11 and 12 through a peripheral sealing material (not shown), and the display observation surface 1a on the front side and the anti-display observation surface 1b on the back side. The polarizing plates 21 and 22 are respectively attached to the plates. Incidentally, in the case of monochrome display, the background color is selected from the normally white mode and the normally black mode depending on the angular combination of the polarization axes of the polarizing plates 21 and 22.

  In the illustrated example, a terminal portion 13 is connected to the second transparent electrode substrate 12 on the back side, and the flexible substrate 3 such as the COF or TCP is connected to the terminal portion 13, and in this state, the liquid crystal panel 1. Is stored in the holder 4.

  In this example, the holder 4 includes a backlight storage portion 40 and a panel storage recess 41, and the whole is made of a synthetic resin. Although not shown, the backlight storage unit 40 stores a light source such as an LED, a light guide plate, and the like. When the liquid crystal panel 1 is of a reflective type, the backlight storage unit 40 is not necessary, and the holder 4 includes only the panel storage recess 41.

  The panel storage recess 41 is disposed on the upper side of the backlight storage unit 40 and is formed by a bottom plate 42 and side frames 43 to 46 erected from its four sides. The bottom plate 42 is provided with a window 421 for irradiating the liquid crystal panel 1 with light from the backlight. Moreover, an opening 47 for drawing out the flexible substrate 3 is provided in the side frame 43 facing the terminal portion 13 of the liquid crystal panel 1 among the side frames 43 to 46.

  In order to store the liquid crystal panel 1 in the panel storage recess 41, the liquid crystal panel 1 needs to be fixed. Several fixing methods are known, and one of them is a fixing method using a double-sided tape shown here. That is, the double-sided adhesive tape T is disposed, for example, around the window 421 of the bottom plate 42, and the liquid crystal panel 1 is attached thereon and fixed in the panel housing recess 41.

  As another fixing method, a locking means such as a panel locking claw or hook is provided on the side frame of the holder, and the upper surface of the liquid crystal panel is locked with the panel locking claw or on the upper surface and side surface of the terminal portion of the liquid crystal panel. On the other hand, there is a method in which a hook is engaged to fix the liquid crystal panel in the holder (see Patent Document 1 below).

JP 2002-258246 A

  However, when using a double-sided adhesive tape, there are the following problems. That is, when the arrangement space of the liquid crystal display device is limited due to the use of a mobile phone or the like, the flexible substrate 3 is placed on the back side of the holder 4 as shown in FIG. It is folded back by approximately 180 degrees and connected to a control circuit board (not shown) provided on the back side of the holder 4.

  Accordingly, the liquid crystal panel 1 is always applied with a force in the direction of peeling from the double-sided pressure-sensitive adhesive tape T due to the repulsive force of the flexible substrate 3 returning, and the adhesive force of the double-sided pressure-sensitive adhesive tape T also deteriorates with time, so the reliability is low. .

  In order to solve this, a double-sided adhesive tape having a stronger adhesive force may be used. However, since a highly adhesive tape is generally thick, it is not preferable for reducing the thickness of the module. In addition, there is a problem in that the cost of parts and the work cost of sticking are also incurred due to the use of the double-sided adhesive tape T.

  On the other hand, according to the locking means such as a panel locking claw or hook as seen in Patent Document 1, there is no problem due to aging degradation like the double-sided adhesive tape. However, this conventional example also has the following problems.

  That is, this type of locking means is provided on the upper surface side of the side frame of the holder because it holds the liquid crystal panel from above. Therefore, the thickness of the holder increases correspondingly, which is not preferable in reducing the thickness of the module. Further, the liquid crystal panel may come off the panel locking claw or hook due to external impact or the like.

  Accordingly, an object of the present invention is to provide a liquid crystal display device in which a liquid crystal panel is housed in a holder so that the liquid crystal panel can be securely fixed in the holder for many years without increasing the thickness of the module. It is in.

  In order to solve the above problems, the present invention provides a liquid crystal panel including a polarizing plate attached to the display observation surface side and / or the counter-display observation surface side, and a holder having a panel storage recess in which the liquid crystal panel is stored; And a panel fixing means for fixing the liquid crystal panel in the panel housing recess, wherein the panel fixing means projects at least a part of the polarizing plate toward the outside of the liquid crystal panel. It is characterized by comprising a combination of a locking piece formed and a locking piece receiver provided on the panel housing recess side.

  Although the aspect in which the said locking piece is formed in the polarizing plate by the side of a display observation surface is also contained in this invention, it is preferable that the said locking piece is formed in the polarizing plate by the side of the said non-display observation surface. Further, the length and width in the protruding direction of the locking piece and the number of the arranged pieces may be arbitrarily determined, but regarding the arrangement, each side forming at least one pair of the two pairs of opposing sides of the polarizing plate. It is preferable to be provided. The locking piece receiver includes a locking groove (including a hole shape) formed in a side wall surrounding the panel storage recess and a locking hook standing in the panel storage recess. The locking groove and the locking hook may be used in combination.

  ADVANTAGE OF THE INVENTION According to this invention, a liquid crystal panel can be reliably fixed by a simple operation | work in a holder using the polarizing plate stuck on a liquid crystal panel. In particular, when the locking piece is formed on the polarizing plate on the side opposite to the observation surface, the locking piece receiver is disposed in the panel housing recess of the holder so that the thickness of the holder is not increased.

  Moreover, it is only necessary to change the planar size of the polarizing plate that has been conventionally used as a necessary part, and a separate part such as a double-sided adhesive tape is not required, so that the product cost can be reduced.

  Next, the present invention will be described in more detail based on some embodiments shown in the drawings, but the present invention is not limited thereto. FIG. 1 is an exploded plan view schematically showing the liquid crystal display device according to the first embodiment, and FIG. 2 is a schematic sectional view thereof. In the following description, components that can be regarded as the same as or the same as those in the conventional example described above with reference to FIGS. 5 and 6 are denoted by the same reference numerals.

  According to this, the liquid crystal display device has, as a basic configuration, a liquid crystal panel 1 including first and second transparent electrode substrates 11 and 12 and a flexible substrate connected to the terminal portion 13 of the liquid crystal panel 1. 3 and a holder 4 disposed on the back surface (anti-observation surface) 1b side of the liquid crystal panel 1.

  The holder 4 includes a backlight storage portion 40 and a panel storage recess 41 and is entirely made of a synthetic resin. However, when the liquid crystal panel 1 is of a reflective type, the backlight storage portion 40 is unnecessary, and the holder 4 Is provided with only the panel housing recess 41. The panel housing recess 41 is formed of a bottom plate 42 and side frames 43 to 46 erected on its four sides, and the side frame 43 is provided with an opening 47 for pulling out the flexible substrate 3.

  In the first embodiment, of the two substrates included in the liquid crystal panel 1, the first transparent electrode substrate 11 is the display observation surface side substrate, and the second transparent electrode substrate 12 is the back surface side (counter display observation surface). The terminal portion 13 is provided on the second transparent electrode substrate 12 side on the back surface side. That is, in terms of size, the second transparent electrode substrate 12 is larger than the first transparent electrode substrate 11, and the liquid crystal panel 1 is in the panel housing recess 41 of the holder 4 with the second transparent electrode substrate 12 on the back side facing down. Placed in.

  Polarizing plates 21 and 22 are respectively attached to the front surface (display observation surface) 1a and the back surface 1b of the liquid crystal panel 1. In this first embodiment, the polarizing plate 22 provided on the back surface side 1b of the liquid crystal panel 1 is used. The two locking pieces 221, 222 and the locking pieces 223, 224 are formed on the two opposite sides 22a, 22b on the long side.

  As shown in FIG. 1, the locking pieces 221 and 222 and the locking pieces 223 and 224 protrude outward from the back surface 1 b of the liquid crystal panel 1 at the corners of the two opposite sides 22 a and 22 b on the long side. It is shaped like a tongue.

  The protruding length and width of the locking piece may be arbitrarily designed. Therefore, for example, the locking piece may protrude over substantially the entire width of each side 22a, 22b. The polarizing plate 21 on the front surface 1a side may be provided only on the display unit of the liquid crystal panel 1 as in the past.

  As shown in FIGS. 1 and 2, the side frame 43 of the panel storage recess 41 is formed with slits 48 and 49 that are the counterparts (locking piece receivers) of the locking pieces 221 and 222. Are formed with slits 50 and 51 which are counterparts of the locking pieces 223 and 224. Each of these slits may be a groove or a hole.

  In order to mount the liquid crystal panel 1 in the holder 4, first, the flexible substrate 3 is connected to the terminal portion 13, and then the flexible substrate 3 is positioned on the opening 47 side of the holder 4. Then, after inserting the locking pieces 223 and 224 on the side 22 b side of the polarizing plate 22 into the slits 50 and 51 of the side frame 45, the liquid crystal panel 1 is pushed into the panel housing recess 41.

  At this time, the locking pieces 221 and 222 on the other side 22a side are brought into contact with the side wall 43 and elastically deformed, and are elastically restored when they are positioned relative to the slits 48 and 49, and are fitted into the slits 48 and 49. . Needless to say, the locking pieces 221 and 222 may be inserted into the slits 48 and 49 first, and the locking pieces 223 and 224 may be elastically deformed and fitted into the slits 50 and 51.

  In this way, the liquid crystal panel 1 is fixed in the panel housing recess 41 via the locking pieces 221 to 224. Note that when the liquid crystal panel 1 is housed by being pushed into the panel housing recess 41 as described above, the protruding lengths of the locking pieces 221 to 224 are preferably as small as possible, for example 0.5 to 1 A sufficient fixing force can be obtained even at about 0.0 mm. Further, in order to prevent rattling, it is preferable to dispose an elastic spacer S on the bottom plate 42 of the panel housing recess 41.

  Next, a second embodiment of the present invention will be described with reference to FIG. In the second embodiment, the width of the flexible substrate 3 connected to the terminal portion 13 is wide, the opening 47 is enlarged correspondingly, and a slit cannot be formed in the side frame 43.

  In such a case, as in the second embodiment, the locking pieces 221 and 222 and the locking pieces are respectively formed on the two opposite sides 22c and 22d on the short side of the polarizing plate 22 as in the first embodiment. 223, 224 are formed, and the corresponding slits 48, 49 and slits 50, 51 may be moved to the side frames 44, 46 correspondingly.

  As a modification of the second embodiment, the locking pieces 223 and 224 are formed on the one side 22b side of the long side as in the first embodiment, and only the locking pieces 221 and 222 are opposed to the short side. It may be formed on two sides.

  Next, a third embodiment of the present invention will be described with reference to FIG. In the third embodiment, in contrast to the first embodiment, the second transparent electrode substrate 12 having the terminal portions 13 is used as the display observation surface side substrate, and the first transparent electrode substrate 11 is used as the back surface side substrate in the panel housing recess 41. It is about the case where it arranges.

  Also in this case, the locking pieces 211 and 212 and the locking pieces 213 and 213 are respectively provided on two opposite sides on the long side of the polarizing plate 21 provided on the first transparent electrode substrate 11 on the back surface side, as in the first embodiment. 214, and slits 50 and 51 similar to those of the first embodiment are formed on the side frame 45 facing one of the locking pieces 213 and 214 as its counterpart.

  Since there is a distance between the other locking pieces 211 and 212 and the side frame 43, a slit serving as the counterpart cannot be formed in the side frame 43. Therefore, in the third embodiment, a hook 52 having an inverted L-shaped locking claw 521 is provided upright at a position facing the locking pieces 211 and 212 in the panel storage recess 41 as the locking piece receiver. ing.

  In addition, when the back side substrate is smaller than the display observation surface side substrate as in the third example, the second example and its modification may be applied to the polarizing plate attached to the back side substrate. Well, this eliminates the need for standing hooks in the panel housing recesses.

  In each of the above embodiments, a locking piece is provided on the polarizing plate attached to the back surface 1b side of the liquid crystal panel 1, but the present invention is not limited to this, and the front surface 1a of the liquid crystal panel 1 is provided. A locking piece can also be formed on the polarizing plate attached to the side according to the embodiment described in the above embodiments. In this case, a latch piece receiver may be provided on the side frame of the holder 4 facing the position of the latch piece.

It is a top view which decomposes | disassembles and shows the liquid crystal display device based on 1st Example of this invention. It is typical sectional drawing of the liquid crystal display device which concerns on the said 1st Example. It is a top view which shows only the liquid crystal panel contained in the liquid crystal display device which concerns on 2nd Example of this invention. It is typical sectional drawing which shows the liquid crystal display device which concerns on 3rd Example of this invention. It is a top view which decomposes | disassembles and shows the liquid crystal display device which concerns on a prior art example. It is typical sectional drawing of the liquid crystal display device which concerns on a prior art example.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Liquid crystal panel 11,12 Transparent electrode board | substrate 13 Terminal part 14 Opposite terminal part side 21,22 Polarizing plate 211-214,221-224 Locking piece 3 Flexible board 4 Holder 41 Panel accommodation recessed part 42 Bottom plate 43,44,45,46 Side frame 47 Opening 48, 49, 50, 51 Slit 52 Hook 521 Locking claw

Claims (5)

A liquid crystal panel including a polarizing plate attached to the display observation surface side and / or the non-display observation surface side, a holder having a panel storage recess in which the liquid crystal panel is stored, and the liquid crystal panel in the panel storage recess In a liquid crystal display device comprising a panel fixing means for fixing,
The panel fixing means comprises a combination of a locking piece in which a part of at least one of the polarizing plates protrudes to the outside of the liquid crystal panel and a locking piece receiver provided on the panel housing recess side. A liquid crystal display device.   The liquid crystal display device according to claim 1, wherein the locking piece is formed on the polarizing plate on the side opposite to the display side.   3. The liquid crystal display device according to claim 1, wherein the locking piece is provided on each side forming at least one of the two opposing sides of the polarizing plate.   4. A liquid crystal display device according to claim 1, wherein the locking piece receiver comprises a locking groove formed in a side wall surrounding the panel housing recess.   4. A liquid crystal display device according to claim 1, wherein the locking piece receiver comprises a locking hook standing in the panel housing recess.

Images