JP2006065008A - Holding tool of panel element - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a holding tool of a panel element which reliably prevents damages in a panel element by shocks without increasing a cost and which is advantageous to promote a smaller and thinner application product. <P>SOLUTION: Contact pads 3d made of an elastomer are laid on each inner surface of side plates 3b surrounding an upper space of a frame 3 where a liquid crystal display panel 4 is to be housed, with two contact pads 3d laid in each side plate 3b and in total eight pads laid in the perimeter. These eight pads 3d are placed to oppose to each other on the side plates 3d opposing to each other, and elastically touch the end face of the liquid crystal display panel 4 to be housed to hold the panel. The material of the side plates 3b with the contact pads 3d implanted by a two-color molding method is the same material as a hard component of the elastomer material of the pads 3d. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a holder for storing and holding a panel element such as a liquid crystal display panel in a predetermined position.

  Usually, a panel element such as a liquid crystal display panel is held by a dedicated holder at a predetermined position in a case of an applied product. In this case, if the applied product is a mobile product such as a mobile phone, the user often inadvertently drops or hits the product, and the panel element is likely to be damaged by an impact at that time. In particular, in the case of a liquid crystal display panel using a glass substrate that is vulnerable to impact, there is a risk of causing fatal damage as a product.

  Therefore, conventionally, as disclosed in Patent Document 1, a measure has been adopted in which an impact absorbing material is installed in a holder for holding a liquid crystal display panel to prevent breakage due to the impact.

However, in the case of the fixed frame of the liquid crystal display panel disclosed in Patent Document 1, shock absorbing materials are installed at the four corners of the frame, respectively, and the number of parts increases, which increases the assembly man-hours and the cost of the applied product. Invite up. In addition, it is extremely disadvantageous for reducing the size and thickness of products that have become increasingly demanding by customers in recent years.
JP 2003-279938

  SUMMARY OF THE INVENTION An object of the present invention is to provide a panel element holder that can surely prevent the panel element from being damaged due to an impact without causing an increase in cost and is advantageous for promoting the reduction in size and thickness of the applied product.

  The panel element storage holder of the present invention is a holder for holding a panel element made of a flat substrate in a predetermined position, and a pair of holding members that hold the substrate in contact with at least a pair of opposing end surfaces. A contact member having a member and a support member that supports one main surface of the substrate, and each contact portion that is in contact with the pair of end surfaces of the pair of sandwiching members is formed of an elastomer. The base part on which the part is installed is formed of a hard resin.

  According to the panel element holder of the present invention, in order to hold the panel element, an abutting portion to be brought into contact with the end surface of the substrate is formed of an elastomer, and a base portion on which the abutting portion is disposed is formed of a hard resin. Therefore, by integrally molding the plurality of different resin materials, it is possible to easily obtain a holder in which the impact absorbing member is integrally planted without being bulky and with a small number of work steps. It is possible to reliably prevent damage due to the impact of the container and to provide a storage holder that is advantageous for promoting the reduction in size and thickness of the applied product at low cost.

  In the panel element storage holder of the present invention, the pair of clamping members are preferably formed by a two-color molding method using an elastomer resin material and a hard resin material, thereby reliably preventing damage due to impact. In addition, it is possible to manufacture a panel element holder that is advantageous for promoting the reduction in size and thickness of the applied product with fewer man-hours.

  In addition, it is preferable that the hard component of the elastomer material that forms the sandwiching portion and the main component of the hard resin material that forms the base portion belong to the same class, thereby improving the adhesion between the sandwiching portion and the base portion. To do.

  Furthermore, the present invention is preferably applied to a product in which the panel element is a liquid crystal panel in which liquid crystal is sealed between a pair of glass substrates, thereby promoting robustness and reduction in size and thickness without increasing costs. Liquid crystal panel products such as mobile phones can be obtained.

Hereinafter, preferred embodiments of the present invention will be described.
FIG. 1 is a schematic cross-sectional view showing the overall configuration of a liquid crystal display module as an embodiment of the present invention, and FIG. 2 is a plan view showing the main part of the liquid crystal display module.

  The casing of the present liquid crystal display module is formed by fitting a cover case 2 having the same shape from which a bottom plate is removed to a storage case 1 having a shape in which a top plate of a flat rectangular parallelepiped box is removed. Both of these cases 1 and 2 are formed by processing a metal plate. A display window 2b for observing the display is formed in the top plate 2a of the cover case 2.

  A frame 3 is accommodated in the casing. The frame 3 of this embodiment is formed in a structure having a two-stage storage space. That is, a step 3c is formed over the entire inner surface of the side plate 3b erected on the peripheral edge of the rectangular bottom plate 3a, and the lower space and the area of the step 3c from this step 3c are defined as a boundary. Two storage spaces, each having an upper space that is wide enough, are formed in two upper and lower stages.

  A plurality of contact pads 3d are provided on the inner surface of the side plate 3b in the upper space so as to be in contact with the substrate end surface of the panel element housed in this space. As shown in FIG. 2, two of these contact pads 3d are arranged on the inner surface of each side of the side plate 3b that surrounds the periphery of the upper space having a rectangular planar shape, for a total of eight. . The eight contact pads 3d are arranged such that the contact pads of the side plates 3b facing each other face each other.

  Here, in the frame 3 according to the present invention, the contact pad 3d is formed of an elastomer that is a high-molecular compound rich in elasticity, and the other frame body including the bottom plate 3a and the side plate 3b is formed of a hard resin material. In the present embodiment, the contact pad 3d is formed of an elastomer obtained from a material obtained by mixing polybutylene terephthalate (PBT) as a hard component with polyether as a soft component, and the frame body is formed of polybutylene terephthalate. .

  As described above, the hard component of the elastomer, which is the material of the contact pad 3d, is made of the same polybutylene terephthalate as the material of the frame 3 main body including the side plate 3b, so that the affinity between the heterogeneous materials, that is, the elastomer and the hard resin can be increased. In addition, the contact pad 3d and the side plate 3b of the base portion on which the contact pad 3d is firmly fixed firmly prevent the contact pad 3d from falling off, and the reliability of the frame 3 as a panel holding member is remarkably improved. To do.

  In order to realize an excellent combination of the elastomer material of the contact pad 3d and the hard resin material of the frame 3 main body, the hard component of the elastomer and the hard resin material should be the same as described above. Although it is more preferable, materials that belong to the same class (system) may be used even if they are not the same material. For example, when the frame 3 body is formed of polyethylene terephthalate (PET), the hard component of the elastomer material forming the contact pad 3d may be a polyester resin material other than polyethylene terephthalate.

  The frame 3 made of two kinds of resin materials having different materials is formed by a two-color molding method. That is, a two-color molding die having a first cavity for molding the contact pad 3d and a second cavity for molding the frame 3 main body is prepared, and the first cavity is formed by a slide core. Polybutylene terephthalate, which is a frame body material, is injected into the second cavity in a state of being closed with respect to the second cavity and cured. After that, the slide core is moved to open the first cavity, and after the elastomer component of the above-mentioned hard component is polybutylene terephthalate and the soft component is polyether is hardened by injection, the molding die is opened. The molded product is released from the mold. Thus, as shown in FIGS. 3A and 3B, the contact pad 3d made of elastomer is embedded in the frame side plate 3b made of polybutylene terephthalate resin, which is different from this, in a state where the base portion is buried. An integrally planted frame 3 is obtained. In this case, as shown in FIG. 3B, the side surface of the base portion of the contact pad 3d is buried in the side plate 3b at a reverse taper angle with respect to the detaching direction indicated by the white arrow. The removal of the pad 3d is also structurally prevented.

  When the frame 3 is formed by the two-color molding method, the contact pad 3d and the material of the frame 3 body, which are different from each other, are used in the corresponding cavities in the mold. Injection injection. In this case, by appropriately adjusting the injection timing and pressure of each material, it is possible to form a boundary portion where heterogeneous materials enter each other at an intended position, and the contact pad 3d is integrated with the side plate 3b. As a result, the frame 3 is obtained which has been improved in reliability. Further, the molding die has a simple structure that does not require a slide core or the like, and the die cost is reduced.

  As another molding method, an insert molding method can be applied in which the contact pad 3d is first molded, and another frame main body such as the side plate 3b is injection-molded in a state where this is set in a mold. is there.

  Returning to FIG. 1, the liquid crystal display panel 4 is accommodated in the upper space of the frame 3. In the liquid crystal display panel 4, a pair of glass substrates 5 and 6 on which electrodes (not shown) are formed are joined to each other with a predetermined gap by a frame-shaped sealing material 7 with their electrode formation surfaces facing each other. A liquid crystal 8 is sealed between glass substrates 5 and 6 surrounded by a sealing material 7. A pair of front and rear polarizing plates 9 and 10 are attached to the outer surfaces of the glass substrates 5 and 6, respectively. The liquid crystal display panel 4 of this embodiment is a simple matrix type liquid crystal display panel, and a plurality of stripe electrodes are parallel to each other on the opposing surfaces (inner surfaces) of the pair of glass substrates 5 and 6, respectively. It is arranged. And the opposing part of both these stripe electrodes becomes a pixel part, and the display area Dd in which these pixel parts are arranged in a matrix is formed.

  As shown in FIG. 2, one glass substrate 6 among the glass substrates 5 and 6 has an edge portion extending outward from a corresponding end surface of the other glass substrate 5 to form an extension portion 6 a. Has been. A plurality of lead wires 11 connected to the electrodes of the substrates 5 and 6 and their connection terminals (not shown) are disposed on the surface of the extension 6a (extension surface of the electrode forming surface). ing.

  A driving circuit element 12 for driving the liquid crystal is directly mounted on the extending portion 6a in which the above-described lead-out wiring 11 and the connection terminal row are disposed by a COG (Chip On Glass) method. A connection terminal row (not shown) in which connection terminals of the input wiring 13 to the drive circuit element 12 are arranged is formed at the edge of the extension portion 6a, and the flexible wiring board 14 is formed in the connection terminal row. One end of each is conductively joined.

  In the liquid crystal display panel 4 configured as described above, the end surfaces of the glass substrates 5 and 6 are sandwiched between the side plates 3b of the frame 3 via the contact pads 3d. In the present embodiment, as described above, a total of eight abutting pads 3d are abutted against the peripheral end surfaces of the glass substrates 5 and 6 in four pairs implanted on the inner surface of the side plate 3b, and the liquid crystal display panel 4 is attached to the frame. The entire circumference is sandwiched between the side plates 3b. Here, since each contact pad 4d is made of an elastic elastomer, the liquid crystal display panel 4 is elastically held between the side plates 3b via the contact pads 3d, so that when the liquid crystal display module is dropped, etc. Is absorbed and relaxed by the contact pad 3d, and the glass substrates 5 and 6 are prevented from being damaged.

  In the liquid crystal display panel 4, the outer peripheral edge of the glass substrate 6 is supported by the step portion 3 c of the frame 3. In the present embodiment, as shown in FIG. 3A, the outer peripheral edge of the glass substrate 6 is supported in a state of being fixed to the stepped portion 3 c of the frame 3 by the double-sided adhesive tape 15.

  As described above, the movement of the liquid crystal display panel 4 in the surface direction is elastically held by the frame side plate 3b via the contact pad 3d, and the movement in the thickness direction is regulated by the double-sided adhesive tape 15 on the frame step portion 3c. By being fixed and blocked, the liquid crystal display module is accurately and stably held at a predetermined position in the liquid crystal display module for a long time.

  Returning to FIG. 1, the backlight unit 17 is accommodated in the lower space of the frame 3. In the backlight unit 17 of the present embodiment, a cold cathode tube 19 is disposed oppositely along one end surface of the light guide plate 18 whose planar outer shape is rectangular. The light guide plate 18 is formed using a highly transparent resin material such as acrylic resin, and has an area in which the effective display area Dd of the liquid crystal display panel 4 is expanded by a predetermined width over the entire circumference. Then, minute unevenness (not shown) is formed on the rear surface 18b opposite to the front surface 18a facing the liquid crystal display panel 4.

  A light reflection sheet 20 is installed on the rear surface 18 b of the light guide plate 18. The light reflecting sheet 20 of the present embodiment is a light scattering reflecting sheet made of a white PET (polyethylene terephthalate) sheet. The light reflecting plate 20 surrounds the cold cathode tube 19 at one extended end. The reflection sheet of light emitted from the rear surface 18b and the reflector of the cold cathode tube 19 are integrated.

  An optical sheet laminate 21 is installed on the front surface 18 a of the light guide plate 18. The optical sheet laminate 21 is formed by sequentially laminating a lower diffusion sheet 21a, a prism sheet 21b, and an upper diffusion sheet 21c on the front surface 18a of the light guide plate 18. As a result, the light emitted from the front surface 18a of the light guide plate 18 in a planar shape has a substantially uniform luminance distribution by the upper and lower diffusion sheets 21a and 21c, and the emission direction is changed by the prism sheet 21b to the substantially normal direction of the front surface 18a. To be aligned.

  In the backlight unit 17 configured as described above, the light emitted from the cold-cathode tube 19 is reflected directly or by the surrounding light reflecting sheet 20 and enters the light guide plate 18 from its opposite end surface, When this incident light is incident on minute irregularities (not shown) of the rear surface 18b, the incident light is totally reflected toward the front surface 18a and is emitted in a planar shape from the front surface 18a. The planar outgoing light has a uniform luminance distribution by the optical laminate 21 described above, and the outgoing direction is aligned with the substantially normal direction of the front face 18a. There is also light that enters the minute unevenness and exits from the light guide plate 18, but the emitted light is reflected by the light reflection sheet 20 and enters the light guide plate 18 again. Thereby, the utilization efficiency of the light emitted from the cold cathode tube 19 is significantly increased.

  A drive control circuit board 22 is mounted on the rear surface of the bottom plate 3 a in the frame 3. The drive control circuit board 22 controls the drive of the entire liquid crystal display module, and is electrically connected to the liquid crystal display panel 4 by the flexible wiring board 14 described above. The drive control circuit board 22 is fixed by a plurality of locking hooks 23 erected on the rear surface of the frame bottom plate 3a.

  As described above, in the liquid crystal display module of the present embodiment, the contact pad 3d that contacts the end surfaces of the glass substrates 5 and 6 to hold the liquid crystal display panel 4 is made of an elastomer, and the contact pad 3d is arranged. Since the frame 3 made of a hard resin material is formed by a two-color molding method using a plurality of different resin materials, the contact pad 3d of the shock absorbing member is not bulky and is integrally implanted. The frame 3 can be easily obtained with less work man-hours. As a result, the liquid crystal display panel 4 can be reliably prevented from being damaged by an impact, and the frame 3 advantageous for promoting the downsizing and thinning of the liquid crystal display module can be obtained at low cost. Can be manufactured. Further, the hard resin material forming the main body of the frame 3 is made of the same polybutylene terephthalate as the hard component of the elastomer material forming the contact pad 3d to increase the affinity between different materials, and the contact pad 3d is disposed in the side plate 3b. Therefore, the contact pad 3d is reliably prevented from being detached from the side plate 3b. As a result, the liquid crystal display panel 4 is accurately and stably held at a predetermined position in the liquid crystal display module for a long time.

In addition, this invention is not limited to said embodiment.
For example, in the above-described embodiment, the contact pads 3d are elastically contacted with the end surfaces of the four sides of the liquid crystal display panel 4 and are uniformly clamped over the entire circumference. It is good also as a structure which abuts and abuts a contact pad.

  In addition, the present invention is not limited to the case of holding a liquid crystal display panel, but of course can be widely applied to the case of holding other various panel elements such as an electroluminescence panel.

It is a typical sectional view showing the whole liquid crystal display module composition as one embodiment of the present invention. FIG. 2 is a plan view showing a liquid crystal display panel held by a frame in the liquid crystal display module shown in FIG. 1. (a) is the III-III sectional view taken on the line of FIG. 2, (b) is the BB sectional drawing in (a).

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Storage case 2 Cover case 3 Frame 4 Liquid crystal display panel 5, 6 Glass substrate 7 Seal material 8 Liquid crystal 14 Flexible wiring board 17 Backlight unit 18 Light guide plate 19 Cold cathode tube 20 Light reflection sheet 21 Optical sheet laminated body 22 Drive control circuit substrate

Claims (4)

A holder for holding a panel element made of a flat substrate in a predetermined position,
A pair of clamping members for holding the substrate in contact with at least a pair of opposed end faces;
A support member that supports one main surface of the substrate;
Of the pair of clamping members, each contact portion that contacts the pair of end surfaces is formed of an elastomer, and a base portion on which the contact portions are installed is formed of a hard resin. Panel element holder.   2. The panel element holder according to claim 1, wherein the pair of holding members are formed by a two-color molding method using an elastomer material and a hard resin material.   3. The panel element holder according to claim 1, wherein the hard component of the elastomer material and the main component of the hard resin material belong to the same class.   The said panel element is a liquid crystal panel formed by sealing a liquid crystal between a pair of glass substrates, The holder of the panel element in any one of the Claims 1 thru | or 3 characterized by the above-mentioned.

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