JP5047933B2 - Liquid crystal display - Google Patents

Description

  The present invention relates to a liquid crystal display device, and more particularly to a liquid crystal display device having a support member that holds or positions a light source or an optical member.

  The liquid crystal display device includes a liquid crystal display panel having a liquid crystal layer and electrodes for applying an electric field to the liquid crystal, a light source such as a fluorescent tube or a light emitting diode that illuminates the liquid crystal display panel from the back side, and the liquid crystal display panel and the liquid crystal display panel. It has an optical member etc. which are arranged between the light source and are composed of a diffusion plate or the like for making the illumination light from the backlight uniform. A support member that holds or positions the optical member is attached to the frame member that houses the light source. The support member also has a function of holding the fluorescent tube when the light source is a fluorescent tube.

As a method of attaching such a support member to the frame member, as shown in Patent Document 1, a method of inserting a fixed plug into the opening of the frame member, or a snap-fit fastener as shown in FIG. 5, a method of inserting and fixing the fastener 5 of the support member 1 into the opening of the frame member has been proposed. In addition, the code | symbol 3 provided in the supporting member 1 shown in FIG. 1 is a positioning means of an optical member, and the code | symbol 4 has illustrated the holding means of the fluorescent tube. Reference numeral 2 denotes a main body of the support member to which an optical member positioning means 3, a fluorescent tube holding means 4, a fastener 5, and the like are attached. The main body 2 is usually formed of a plate-like body.
US Pat. No. 7,192,149

When the fastener 5 as shown in FIG. 1 is used, the fastener 5 largely protrudes from the back surface of the frame member, which causes a problem that it is difficult to reduce the thickness of the liquid crystal display device. As a method for solving such a problem, as shown in Patent Document 2 and FIG. 2, L-shaped leg portions 6 are used as means for fixing the support member 1 to the frame member. Also, as in Patent Document 3 or 4, the frame member is provided with two fitting holes and a holding hole connected thereto, the engaging portion is inserted into the fitting hole, the support member is rotated, and the engaging portion is engaged with the holding hole. There has also been proposed a method for arranging and fixing.
JP 2007-189013 A JP 2001-248613 A JP 2007-180006 A

  When the support member is rotated and fixed as in Patent Document 3 or 4, as long as the optical component positioning means and the fluorescent tube holding means are arranged symmetrically with respect to the rotation axis, There will be no misalignment of the optical component positioning means and the fluorescent tube holding means depending on the manner of fixing to the frame member.

  However, in the case of the support member 1 having the L-shaped legs 6 shown in FIG. 2, the fixing direction of the support member 1 with respect to the opening 11 of the frame member 10 is A or B as shown in FIG. There are two ways. The support member 1 as shown in FIG. 3 is inserted into the opening 11 of the frame member 10, and the support member 1 is moved and fixed in one direction along the surface of the frame member 10 in which the opening 11 is formed. Normally, these fixing directions should be unified for all support members. However, if the fixing directions A or B are mixed due to an error during assembly, the optical components provided on the support member 1 are positioned. Misalignment of the means 3 and the fluorescent tube holding means (not shown) will occur. In particular, with respect to the fluorescent tube holding means, one fluorescent tube is held by the plurality of support members 1, and if the position shift occurs in one support member 1, the fluorescent tube cannot be held well.

Further, as shown in FIG. 4, the L-shaped leg portion 6 has an external force F ₁ , F ₂ , because the leg portion 6 protrudes from the back surface of the frame member 10 when the support member is fixed to the frame member. By adding to the leg part 6, the problem that this leg part 6 is easy to be damaged has arisen. In particular, the L-shaped leg portion 6 has a structure that is easily damaged structurally, such as a bent portion or a portion extending to the back side of the frame member 10. In FIG. 4, the tip 7 of the L-shaped leg 6 is configured to engage with a recess 12 formed on the back surface of the frame member 10, and the support member 1 is configured not to be easily detached from the frame member. ing. In the case where such a structure of the tip portion 7 is provided, if an external force is applied in a state where the tip portion 7 is not sufficiently engaged with the recess 12, the joint portion between the leg portion 6 and the main body portion 2 is easily damaged. Will receive.

  Further, as shown in FIG. 4, in the method of moving and fixing the support member 1 along the surface of the frame member 10, the frame member 10 has an opening 11 at a portion where the leg portion 6 is inserted, and further supports the support member 1. Since the member 1 is moved and fixed, a gap is easily generated between the support member 1 and the frame member 10, and light leakage of the frame member occurs through such a gap or opening, There is also a problem that the luminance is lowered.

  The problem to be solved by the present invention is to solve the above-mentioned problems, prevent erroneous mounting when the support member is attached to the frame member, and prevent damage to the legs and light leakage caused by fixing the support member. A liquid crystal display device capable of being suppressed is provided.

  In order to solve the above problems, the liquid crystal display device according to the present invention has the following characteristics.

(1) A liquid crystal display panel, a light source that illuminates the liquid crystal display panel, an optical member that is disposed between the liquid crystal display panel and the light source, and that uniformizes illumination light from the light source, and the light source A liquid crystal display device having a frame member that accommodates the light source and a support member that is attached to the frame member and holds or positions the light source or the optical member.
Each support member is inserted into the opening of the frame member, and the support member is moved along the surface of the frame member in which the opening is formed, thereby fixing the support member to the frame member. It has a plurality of letter-shaped legs,
The shape of the plane parallel to the surface of the frame member of the support member is asymmetric with respect to a center line perpendicular to the direction of movement of the support member.

(2) In the liquid crystal display device according to (1), a projection shape of each leg portion in the insertion direction on the frame member so that the support member can be inserted into the frame member at a predetermined position; Each leg is set so that the opening shape of the frame member provided corresponding to each leg is substantially the same, and it is difficult to insert the support member into a position different from the predetermined position with respect to the frame member. The projection shape and the opening shape are set so that the projection shape of the portion inserted in the frame member and the opening shape of the frame member provided corresponding to each leg portion do not match. And

(3) In the liquid crystal display device according to (1), in the state in which the support member is fixed to the frame member, the leg is disposed on at least a part of the periphery of the leg portion. A protrusion is provided on the back surface of the frame member to prevent damage to the portion.

(4) In the liquid crystal display device according to (3), the protrusion is formed by drawing or bending the frame member.

(5) In the liquid crystal display device according to (3), the protrusion covers at least part of the opening of the frame member so that light from the light source does not leak to the back side of the frame member. It is formed.

(6) A liquid crystal display panel, a light source that illuminates the liquid crystal display panel, an optical member that is disposed between the liquid crystal display panel and the light source, and that uniformizes illumination light from the light source, and the light source A liquid crystal display device having a frame member that accommodates the light source and a support member that is attached to the frame member and holds or positions the light source or the optical member.
Each support member is inserted into the opening of the frame member, and the support member is moved along the surface of the frame member in which the opening is formed, thereby fixing the support member to the frame member. It has a plurality of letter-shaped legs,
Each of the legs of one support member has a different projection shape in the insertion direction to the frame member,
The plurality of openings of the frame member corresponding to one support member have different opening shapes according to the shapes of the corresponding leg portions.

(7) A liquid crystal display panel, a light source that illuminates the liquid crystal display panel, an optical member that is disposed between the liquid crystal display panel and the light source, and that uniformizes illumination light from the light source, and the light source A liquid crystal display device having a frame member that accommodates the light source and a support member that is attached to the frame member and holds or positions the light source or the optical member.
Each support member is inserted into the opening of the frame member, and the support member is moved along the surface of the frame member in which the opening is formed, thereby fixing the support member to the frame member. With a letter-shaped leg,
Protrusions on the back surface of the frame member are provided on at least a part of the periphery of the leg portion to prevent the leg portion from being damaged while the support member is fixed to the frame member. It is characterized by that.

(8) In the liquid crystal display device according to the above (7), the projection is formed by drawing or bending the frame member.

(9) In the liquid crystal display device according to (7), the protrusion covers at least a part of the opening of the frame member so that light from the light source does not leak to the back side of the frame member. It is formed.

  According to the present invention, each support member is inserted into the opening of the frame member, and the support member is moved along the surface of the frame member in which the opening is formed. A plurality of L-shaped leg portions to be fixed are provided, and the shape of the plane parallel to the surface of the frame member of the support member is asymmetric with respect to the center line perpendicular to the direction of movement of the support member. Therefore, the assembly operator can easily determine the insertion / movement direction of the support member, and erroneous mounting of the support member to the frame member can be prevented.

  Also, the projection shape of each leg in the insertion direction to the frame member and the opening shape of the frame member provided corresponding to each leg so that the support member can be inserted into the frame member at a predetermined position. Are set to be substantially the same, and the projection shape of each leg portion in the insertion direction to the frame member and each leg so that it is difficult to insert the support member at a position different from the predetermined position with respect to the frame member Since the projection shape and the opening shape are set so that the opening shape of the frame member provided corresponding to the portion does not match, erroneous mounting of the support member to the frame member can be prevented more reliably. be able to.

  Further, in order to provide a protrusion on the back surface of the frame member that is close to the leg portion in a state where the support member is fixed to the frame member, and that prevents the leg portion from being damaged at least at a part of the periphery of the leg portion. Further, it is possible to prevent damage to the leg portion related to the fixing of the support member.

  Further, since the projection is formed by drawing or bending the frame member, it is possible to easily form a projection for preventing damage.

  In addition, since the protrusion is formed so as to cover at least a part of the opening of the frame member, it is possible to suppress illumination leakage of the backlight.

Hereinafter, the liquid crystal display device of the present invention will be described in detail using preferred examples.
As shown in FIG. 10, the liquid crystal display device of the present invention is disposed between a liquid crystal display panel PA, a backlight BL that illuminates the liquid crystal display panel, and between the liquid crystal display panel and the backlight. An optical member OS for equalizing illumination light from the light, a frame member FL for housing the backlight, and a support member 1 attached to the frame member and holding or positioning the backlight or the optical member. The present invention relates to a liquid crystal display device having Note that a reflective sheet RS that reflects the light of the backlight BL can be disposed between the frame member FL and the support member 1.

  The feature of the first embodiment of the present invention is the shape of the support member 1. Each support member 1 shown in FIG. 10 is inserted into the opening portion of the frame member FL, and the support member is moved along the surface of the frame member in which the opening portion is formed. A plurality of L-shaped legs fixed to the frame member are provided. As shown in FIG. 5, the shape of the plane parallel to the surface of the frame member of the support member 1 is asymmetric with respect to the center line C perpendicular to the direction of movement of the support member 1. It is characterized by that. FIG. 5 shows only the main body portion 2 and the L-shaped leg portion 6 of the support member.

  “The shape of the plane parallel to the surface of the frame member of the support member (the surface of the frame member along which the support member moves)” in the present invention is as shown in FIGS. 5 (a), (c) to (e). In addition, it means a planar shape when the support member 1 is viewed from above, and when the plate-like main body portion 2 is used as shown in FIG.

  Fig.5 (a) is the top view which looked at the main-body part 2 of the supporting member 1, and FIG.5 (b) has shown sectional drawing in the arrow XX of Fig.5 (a). The feature of the present invention is that when the L-shaped leg portion 6 of FIG. 5B is inserted into the opening of the frame member 1 and moved and fixed in the right direction of the drawing, the insertion direction and the movement direction are easy. As shown in FIG. 5A, the planar shape of the support member 1 is asymmetric with respect to the center line C perpendicular to the moving direction of the support member 1 (the right side direction in the figure).

  Due to such an asymmetric shape, the assembly operator arranges the support member 1 on the frame member so that, for example, the arrow shape of the support member 1 (main body portion 2) in FIG. By doing so, it is possible to prevent erroneous mounting of the support member 1.

  As an example of the asymmetrical shape, as shown in FIG. 5C, a plurality of laterally projecting portions are provided on the main body 2 of the support member 1 and are adjusted so that the projecting areas are different, and the taper of FIG. Various shapes, such as a shape having a shape, and a shape in which one end portion of the main body 2 shown in FIG.

  FIG. 6 is a view for explaining another embodiment for preventing erroneous mounting when the support member 1 is mounted on the frame member 10. Fig.6 (a) is the top view which looked at the main-body part 2 of the supporting member from upper direction, FIG.6 (b) shows sectional drawing in the arrow XX of Fig.6 (a). FIG. 6C is a plan view of the frame member 10 on which the support member 1 is disposed.

  The feature of the present invention shown in FIG. 6 is that the projecting shape of each leg portion 61, 62 in the insertion direction on the frame member so that the support member (main body portion 2) can be inserted into the frame member 10 at a predetermined position. (See FIG. 6A) and the opening shapes 13 and 14 of the frame member 10 provided corresponding to the respective leg portions 61 and 62 are set to be substantially the same, and the support member is set to the frame member. Projection shapes 61 and 62 in the insertion direction of the respective leg portions into the frame member and opening shapes 14 of the frame members provided corresponding to the respective leg portions so that the insertion at a position different from the predetermined position is difficult. The projection shape (see FIG. 6 (a)) and the opening shape (see FIG. 6 (c)) are set so that 13 does not match.

  Specifically, as shown in FIG. 6A, the projected shape of the L-shaped leg is set so that the leg 61 is larger than the leg 62. On the other hand, the opening shape of the frame member 10 is set so that the opening 13 is larger than the opening 14. Therefore, it is possible to attach the support member 1 to the frame member 10 so that the leg portion 61 is inserted into the opening portion 13 and the leg portion 62 is inserted into the opening portion 14, but the leg portion 61 is opened. The projection shape and the opening shape of the legs are set so that it is impossible to insert them into the portion 14 and it is difficult to attach these correspondences in the reverse relationship.

  “Substantially the same” in the sentence “the projection shape of each leg portion in the insertion direction to the frame member and the opening shape of the frame member provided corresponding to each leg portion are set to be substantially the same”. This means that not only the projected shape of the leg and the shape of the opening (opening shape) are the same, but also when the correspondence between the leg and the opening is correct, the leg can be inserted into the opening. Thus, if the shape of the opening (opening shape) is set, it does not need to be exactly the same, and this means that such a shape change is included.

  Examples of other combinations relating to the projected shape of the leg or the opening shape of the frame member include a combination of a rectangular opening 13 and a triangular opening 14 as shown in FIG. Various combinations are possible, such as a combination of the cross-shaped opening 13 and the rectangular opening 14 as described above.

  Further, the embodiment of FIG. 6 or 7 and the embodiment described with reference to FIG. 5 are combined, and not only the arrangement direction and position of the support member 1 are determined based on the planar shape of the support member 1, but also the support. It is also possible to configure the support member 1 so that the support member 1 can be mounted at a more correct position depending on whether or not the leg portion of the member 1 can be inserted into the opening of the frame member.

Next, FIG. 8 is a diagram for explaining an embodiment for preventing the leg portion of the support member 1 from being damaged.
As shown in FIG. 8 (a) or (b), the main body 2 of the support member 1 is fixed to the frame member 10 and close to the leg 6 of the support member, and at least around the leg 6 is provided. In some cases, a protrusion 101 or 102 that prevents the leg 6 from being damaged is provided on the back surface of the frame member 10.

  In FIG. 8, in order to prevent damage to the tip of the L-shaped leg portion 6, projections 101 and 102 are provided close to the tip. Naturally, not only the front end portion, but also a protruding portion can be formed so as to protect the side portion of the leg portion 6 and the bent portion of the leg portion 6 bent to an L shape as will be described later.

  The protrusion 101 or 102 is formed by subjecting the frame member 10 to a drawing process (see FIG. 8B) or a bending process (see FIG. 8A). In order to prevent the light from the backlight from leaking out to the back surface of the frame member, the drawing process is performed as shown in FIG. 8B, rather than the case where the opening 11 is formed by bending as shown in FIG. And those in which no opening is formed are more preferred.

  FIG. 9 is an application example of the protruding portion shown in FIG. 8, and the protruding portion 103 is formed so as to protect the bent portion of the leg portion 6 of the support member 1 main body portion 2 that is bent in an L shape. Since the protrusion 103 is formed so as to cover at least a part of the opening 11 of the frame member 10, the effect of reducing the leakage light of the backlight that reaches the back surface of the frame member through the opening 11 is also reduced. Have. FIG. 9B is a view of the support member attached to the frame member shown in the cross-sectional view of FIG. 9A viewed from the back side of the frame member.

  The technique related to the protrusion shown in FIG. 8 or FIG. 9 can also be applied to the embodiment shown in FIG. 5 to FIG. 7 if necessary, and by these, the liquid crystal display having the above-described excellent operational effects. An apparatus can be provided.

  As described above, according to the present invention, it is possible to prevent erroneous mounting when the support member is attached to the frame member, and to prevent damage to the leg portion related to fixing of the support member, backlight leakage, etc. A possible liquid crystal display device can be provided.

It is a figure which shows the supporting member 1 using the fastener 5 of a snap fit shape. It is a figure which shows the supporting member 1 using the L-shaped leg part. It is a figure explaining the incorrect mounting | wearing to the frame member 10 of the supporting member 1. FIG. Is a diagram for explaining a state of the external force F _1, F ₂ applied to the L-shaped legs 6 of the support 1. It is a figure explaining the shape of the supporting member (main-body part 2) used for the liquid crystal display device which concerns on this invention. It is a figure explaining each shape of the leg part of the supporting member used for the liquid crystal display device which concerns on this invention, and the opening part of a frame member. It is a figure which shows the other application example of the opening shape of the frame member shown in FIG. It is a figure explaining the projection part provided in the frame member in order to prevent damage to the leg part of the supporting member used for the liquid crystal display device which concerns on this invention. It is a figure explaining the Example which added the light leakage prevention function of the backlight to the projection part for preventing damage to the leg part of a supporting member. It is sectional drawing which shows the outline of the liquid crystal display device which concerns on this invention.

Explanation of symbols

1 Support member 2 Main body (support member)
3 Optical member positioning means 4 Fluorescent tube holding means 5 Fasteners 6, 61, 62 L-shaped legs 10 Frame members 11, 13, 14 Openings 101, 102, 103 Protrusion PA Liquid crystal display panel OS Optical member FL Frame member RS Reflective sheet BL Backlight

Claims (8)

A liquid crystal display panel, a light source that illuminates the liquid crystal display panel, an optical member that is disposed between the liquid crystal display panel and the light source, and that uniformizes illumination light from the light source, and the light source are accommodated In a liquid crystal display device having a frame member and a support member attached to the frame member and holding or positioning the light source or the optical member,
Each support member is inserted into the opening of the frame member, and the support member is moved along the surface of the frame member in which the opening is formed, thereby fixing the support member to the frame member. It has a plurality of letter-shaped legs,
The shape of the plane parallel to the surface of the frame member of the support member has an asymmetric shape with respect to a center line perpendicular to the direction of movement of the support member ,
In a state where the support member is fixed to the frame member, at least a part of the periphery of the leg portion is provided on the back surface of the frame member so as to prevent the leg portion from being damaged. A liquid crystal display device characterized by being provided .   The liquid crystal display device according to claim 1, wherein the projection shape of each leg portion in the insertion direction to the frame member and each leg portion are arranged so that the support member can be inserted into the frame member at a predetermined position. The frame member of each leg is set so that the opening shape of the corresponding frame member is set to be substantially the same, and it is difficult to insert the support member at a position different from the predetermined position with respect to the frame member. The projection shape and the opening shape are set so that the projection shape in the direction of insertion into the frame does not match the opening shape of the frame member provided corresponding to each leg portion apparatus. 2. The liquid crystal display device according to claim 1 , wherein the projection is formed by drawing or bending the frame member. The liquid crystal display device according to claim 1 , wherein the protrusion is formed to cover at least a part of the opening of the frame member so that light from the light source does not leak to the back side of the frame member. A liquid crystal display device characterized by the above. The liquid crystal display device according to claim 1, wherein each of the leg portions of one support member has a different projection shape in the insertion direction to the frame member,
The liquid crystal display device, wherein a plurality of openings of the frame member corresponding to one support member have different opening shapes according to the shapes of the corresponding leg portions. A liquid crystal display panel, a light source that illuminates the liquid crystal display panel, an optical member that is disposed between the liquid crystal display panel and the light source, and that uniformizes illumination light from the light source, and the light source are accommodated In a liquid crystal display device having a frame member and a support member attached to the frame member and holding or positioning the light source or the optical member,
Each support member is inserted into the opening of the frame member, and the support member is moved along the surface of the frame member in which the opening is formed, thereby fixing the support member to the frame member. With a letter-shaped leg,
Protrusions on the back surface of the frame member are provided on at least a part of the periphery of the leg portion to prevent the leg portion from being damaged while the support member is fixed to the frame member. A liquid crystal display device characterized by the above. 7. The liquid crystal display device according to claim 6 , wherein the projection is formed by drawing or bending the frame member. 7. The liquid crystal display device according to claim 6 , wherein the projection is formed to cover at least a part of the opening of the frame member so that light from the light source does not leak to the back side of the frame member. A liquid crystal display device characterized by the above.

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