JP4280218B2 - Light source mounting body, illumination device, and liquid crystal display device - Google Patents

Description

  The present invention relates to a light source mounting body having a function of supporting a light source, and is mainly used for a backlight device of a liquid crystal display device.

  In recent years, very large liquid crystal display devices have been developed. In such a large-sized liquid crystal display device, a so-called direct type backlight in which a plurality of fluorescent tubes as light sources are arranged in parallel facing the liquid crystal panel is used.

  In order to form a large liquid crystal display device, the length of the fluorescent tube used for the backlight is inevitably increased, and even a large size requires a thin tube. It needs to be used as a light source. For this reason, if the fluorescent tubes arranged in parallel are only supported at both ends, there is a problem that the support strength of the fluorescent tubes is not sufficient and deformation or breakage occurs.

  Therefore, in order to improve the support strength of the fluorescent tube, a light source support device that supports the intermediate portion of the fluorescent tube is required. Examples of the light source support device include those described in Patent Document 1. The technique described in this publication will be described with reference to FIG.

FIG. 10 is a mounting view of the light source support device 70 described in the above publication. In FIG. 10, a light source support device 70 is provided on a reflection plate 74 and a support 72 made of a flexible material having a partially-circular grip shape having an opening in a part for holding the periphery of a circular cross section of the light source 71. A mounting portion 73 for supporting the light source support device 70 is provided in the hole 75, and the reflection plate 74 is fixed to the light source support device 70 by inserting the mounting portion 73 into the hole 75. The light source 71 is fixed to the reflection plate 74 by holding the light source 71 by the portion 72.
JP 2001-210126 A

  However, although the light source support device described in the above prior art is effective in preventing deformation and breakage of the light source after being mounted, the light source is sandwiched and fixed by a support portion having a notched circular shape having an opening. Therefore, even when the light source is formed of a flexible material, the light source cannot be easily inserted when the light source is inserted into the support portion, and the light source may be deformed or damaged. This problem becomes a serious problem when it is necessary to use a thin and long light source such as a large-screen liquid crystal display device.

  Therefore, in view of such a situation, a first object of the present invention is to provide a light source mounting body that can be attached without deforming or damaging the light source used in the illumination device when the light source is attached.

  In addition, when the above light source support device is applied to an illumination device that requires uniform light irradiation, various problems occur, but the light source that solves the problem and does not prevent uniform light irradiation. A second object is to provide a support device or an illumination device using the support device.

  A third object of the present invention is to provide a liquid crystal display device having a uniform brightness screen with no luminance unevenness using the illumination device.

In order to achieve the above object, a light source mounting body for mounting a light source supported at substantially both ends by a support portion between the support portions, the base and a light source provided on the base for mounting the light source The mounting portion includes a pair of protrusions that are gradually spaced from a joint portion with the base to a tip toward the light source arrangement side in a state where the base is attached to the mounting plate. The light source mounting body is formed so that the tip protrudes from the light source when the light source is mounted.

If comprised in this way, when mounting a light source in an illuminating device, it can mount , without deform | transforming or damaging, and can support a light source easily.

  Further, a configuration in which a plurality of light sources can be supported by a single light source mounting body is more preferable because a plurality of light source mounting bodies are not required in order to arrange a plurality of light sources.

Further, when the light source placement body is provided with a protrusion that protrudes from the light source on the light source arrangement side on the base body, when the light source placement body is used in a liquid crystal display device, a diffusion plate or the like is positioned simultaneously with the positioning of the light source. Therefore, it is possible to position the light source and the optical member by preventing the warpage of the optical member, and it is possible to maintain a uniform planar light emission.
Moreover, it is set as the illuminating device provided with the said light source mounting body.
Furthermore, it is set as the liquid crystal display device provided with the said illuminating device and the liquid crystal panel.

  According to the present invention, when the light source is attached to the lighting device so as to support the light source at a predetermined position, the light source can be arranged at a predetermined position without applying stress to the light source, and therefore, the attachment is easy without being damaged or deformed.

  Hereinafter, the light source support device according to the first embodiment of the present invention will be described with reference to FIGS. FIG. 1 is a front view showing the entire light source support device 1 of the present invention. 2A is a projection view of a surface on the placement unit 12 arrangement side of the placement body 10, and FIG. 2B is a front view of the placement body 10, and FIG. FIG. 2A is a projected view of the surface of the mounting body 10 on the side where the locking portion 13 is arranged, and FIG. 2D is a side projection view of the mounting body 10. 3A is a front view of the restricting body 20, and FIG. 3B is a projection view of a surface of the restricting body 20 on the restricting portion arrangement side. FIG. 4 is a cross-sectional view showing a state where the light source support device 1 supports the light source.

  The configuration of the light source support device 1 will be described. The light source support device 1 is roughly composed of two members. One of them is a mounting body 10 having a mounting section 12 for mounting a light source, and the other has a regulating section 22 that regulates the light source placed on the mounting body 10 so as not to move from a predetermined position. It is the regulation body 20.

  As shown in FIG. 2, the mounting body 10 includes a mounting portion 12 on which a light source is mounted on a flat substrate 11 that is a main body, and a locking portion for attaching the light source support device 1 to a mounted plate. 13, a locking piece 14 for engaging the regulating body 20 and the mounting body 10, and a tip protruding to the side opposite to the base body 11 from the light source when the light source is mounted on the mounting portion 12. And a round conical protrusion 15.

  More specifically, each mounting portion 12 has a purpose of mounting a light source, and is provided on one surface of the base 11 and gradually spaced from the junction with the base 11 to the tip. It consists of a pair of protrusions 12a and 12b, and is integrally molded with the base 11.

  The locking portion 13 is provided on a surface opposite to the surface on which the mounting portion 12 of the base body 11 is disposed, and a shaft portion 13a that is a shaft having a length that can penetrate a mounted plate (not shown). And a claw portion 13b provided at the end of the shaft portion 13a, and is formed integrally with the base 11.

  Further, the locking piece 14 is formed on the same surface as the surface on which the mounting portion 12 of the base body 11 is formed, and has a shape that can be engaged with the locked piece 24 provided on the regulating body 20. Is.

  Then, as shown in FIG. 3, the restricting body 20 includes a restricting portion 22 for restricting the movement of the light source placed on the placing portion 12 on the flat base 21 that is the main body, and the locking piece 14. And a through-hole 25 through which the protrusion 15 penetrates.

  When the regulating body 20 is attached to the mounting body 10, the regulating section 22 is placed at the placement position of the placing section 12 so as to be opposed to the placing section 12 so as to be spaced apart from the placing section 12 by a little larger than the size of the light source. They are arranged correspondingly and are formed integrally with the base 21.

  Further, the locked piece 24 is arranged corresponding to the arrangement position of the locking piece 14 so as to be locked to the locking piece 14 when the restricting body 20 is attached to the mounting body 10. The base body 21 is integrally formed.

  And the through-hole 25 is arrange | positioned corresponding to the arrangement position of the processus | protrusion 15 so that the processus | protrusion 15 may penetrate when the control body 20 is attached to the mounting body 10. FIG.

  The manner in which the light source is supported by using the mounting body 10 and the regulation body 20 formed as described above will be described with reference to FIG. 4. First, the mounting plate 6 corresponds to the arrangement position of the locking portion 13. Then, the locking portion 13 is passed through the through-hole 7 provided, and the claw portion 13 b is hooked around the through-hole 7 to fix the mounting body 10 to the mounted plate 6. Next, after the light source 30 (here, a cylindrical fluorescent tube is used) is placed on the placement portion 12, the projection 15 is passed through the through hole 25, and the placement body 10, the regulation body 20, and the like. Are brought into proximity with each other, and the locked piece 24 is fitted into the locking piece 14 to engage them. Then, in a state where the light source 30 is placed on the placement unit 12, the movement of the light source 30 in a direction that cannot be regulated by the shape of the placement unit 12 is regulated by the regulation unit 22.

  If formed in this way, the mounting portion 12 and the restricting portion 22 do not suppress the outer periphery of the light source 30, so that no stress is applied when the light source 30 is mounted. Therefore, the light source 30 is not damaged.

  The light source 30 here mainly corresponds to a thin fluorescent tube. However, other light sources 30 can be similarly prevented from being broken if they are long and thin like an optical fiber.

  In addition, the shapes of the placement portion 12 and the restriction portion 22 are not limited to those described above. For example, in the case of supporting a circular outer periphery such as a fluorescent tube, the placement portion 12 and / or the restriction portion. 22 may be an arcuate surface, that is, any shape can be used as long as no stress is applied to the light source when the light source is arranged.

  Furthermore, in the above, the to-be-attached board 6 means the general member which latches a light source support apparatus, and the reflecting plate 36 shown by the following embodiment is contained in this concept.

  1 to 4 show a case where there are a plurality of mounting bodies 12 and regulating bodies 20 regulating sections 22 of the placing section 10. However, even if a single body is used, damage to the light source is prevented. The point which produces an effect is the same. However, when there are a plurality of light sources, a plurality of light sources can be supported by a single light source support device, which is preferable because the arrangement positions of the plurality of light sources can be reliably arranged at desired positions.

  And it is suitable if the protrusion 15 protrudes in the side opposite to the arrangement | positioning side of the light source 30 rather than the through-hole 25. FIG.

  For example, in an illumination device that obtains uniform planar light emission, a diffusion plate 8 (see FIG. 8) that diffuses light emitted from the light source 30 is disposed on the side opposite to the mounted plate arrangement side with respect to the light source. In some cases, the diffuser plate may be warped toward the light source due to heat or moisture from the light source 30. When this warpage occurs, the distance between the light source and the diffusion plate changes from the position initially planned for the design, and uniform planar light emission cannot be obtained. However, this warpage is caused by the mounting body 10 and the regulating body 20. It is preferable to prevent the projection 15 used as a positioning when the two are engaged with each other as a support. As a result, it is possible to form a light source support device that does not warp to some extent even when warping occurs and maintains a uniform planar light emitting state without newly providing a special member. The embodiment in this case will be described later as a third embodiment.

  Further, in the above description, the illumination device that obtains uniform planar light emission is given as an example. An optical member that may warp on the side opposite to the arrangement side (in this specification, the term “optical member” is a generic term for members having the purpose of adjusting the light emitted from the light source to a desired state. The same applies to the case of using (when used).

  Next, an example in which a change is made to the first embodiment will be described with reference to FIG. 5 as a second embodiment. FIG. 5 is a schematic sectional view showing a second embodiment of the present invention. In addition, about 2nd Embodiment, the same code | symbol is attached | subjected to the point similar to 1st Embodiment, and description is abbreviate | omitted.

  In the second embodiment, the mounting body 20 shown in the first embodiment is formed to be transparent, and is further emitted from the light source to the engaging portion 13 on the side opposite to the light source arrangement side of the mounted plate. The light transmission preventing means for preventing the transmitted light from being transmitted is provided.

  FIG. 5 shows a case where a colored coating 55 or a coating 55 made of plating that blocks light to some extent is formed on the surface of the locking portion 13 opposite to the light source arrangement side as the light transmission preventing means. .

  In addition, the light transmission preventing means has a further different mode. As shown in FIG. 6, the locking portion 13 is covered with a colored cap 56 that blocks light to some extent, or the locking portion 13 itself is shown in FIG. Can be formed in the same manner by using a colored locking portion 13a formed of a colored material that blocks light to a certain extent.

  Next, as a third embodiment, a configuration in which the light source support device 10 as described above is used in an illumination device will be described with reference to FIG. FIG. 8 is a cross-sectional view showing a part of an example in which the light source support device 1 described in the first embodiment is used in a lighting device 50 that irradiates light emitted from the light source 30 as uniform planar light in one direction. FIG.

  The illuminating device 50 has a function of reflecting light emitted from the light source 30, and the light source support device 1 is attached to the reflecting plate 36 using the engaging portion 13, and is separated from the tip of the protrusion 15 by a predetermined distance. A diffuser plate 8 that is disposed and diffuses and uniformizes and transmits light emitted from a light source and reflected from a reflector 36 is fixed to a frame 31.

  To describe each configuration in detail, the reflection plate 36 is a plate-like material having a function of reflecting incident light in a predetermined direction, and is a thin plate such as iron, aluminum, magnesium alloy (about 0.8 mm for aluminum). Used) is formed in a box shape with one surface covering the light source, and a high-reflectivity material coating or a sheet having a high reflectivity is pasted or placed on the surface thereof.

  The diffusing plate 8 is a plate-like material that diffuses incident light to make a uniform planar light emitting state, and is formed of a plate material made of milky white acrylic or polycarbonate (for example, having a thickness of about 2 mm). Further, the light source 30 supports a plurality of small-diameter fluorescent tubes supported by the placement unit 12 and the regulating unit 22 of the light source support device 1 and arranged in parallel.

  In such a configuration, when the light source 30 is driven by a light source driving device (not shown) that causes the light source 30 to emit light, the light emitted from the light source 30 is reflected directly or by the reflecting plate 36 toward the diffusing plate 8, and the diffusing plate. The light is diffused at 8 to become substantially uniform planar light and is emitted from the diffusion plate 8.

  When the illuminating device 50 is used for a long period of time, the diffuser plate 8 may be warped toward the light source 30 due to the influence of heat and humidity of the light source 30. Since the amount of warpage can be regulated, uniform light emission can be obtained for a long time.

  Further, the lighting device 50 can be further modified. That is, in the illumination device 50 for the purpose of uniform light irradiation, it is not preferable that luminance spots such as a partial shadow of the light source support device 1 occur. Therefore, the regulation body 20 that is a member on the diffusion plate 8 side of the light source 30 of the light source support device 1 is formed transparently. If comprised in this way, since the light emitted from the light source 30 with the member near the diffuser plate 8 is not blocked, it can be set as the suitable illuminating device which the brightness spot resulting from it does not generate | occur | produce.

  Similarly, the mounting body 10 is preferably formed transparently from the viewpoint of preventing luminance unevenness. However, if the locking portion 13 is transparent, light is transmitted to the side opposite to the light source 30 arrangement side of the reflecting plate 36, and therefore light transmission prevention means similar to those shown in FIGS. 5 to 7 are required. . By providing this light transmission preventing means, it is possible to prevent light from being transmitted to the side of the reflecting plate 36 opposite to the light source 30 arrangement side.

  Next, the case where the above-described illumination device 50 is used as a liquid crystal display device will be described as a fourth embodiment. FIG. 9 is a cross-sectional view showing a part of the liquid crystal display device.

  In FIG. 9, in addition to the configuration of the illumination device 50, the liquid crystal display device 60 is arranged on the side opposite to the light source arrangement side of the diffusion plate 8, and diffuses to input light required by the liquid crystal panel 62 as input. Other than the optical sheet 61 that performs processing such as polarization on the light emitted from the plate 8, the liquid crystal panel 62 that is disposed opposite to the diffusion plate 8 with the optical sheet 61 interposed therebetween, and the portion that becomes the display screen of the liquid crystal panel 62 And a rear cover 63 that covers the reflection plate 36 and is connected laterally to the front cover 63.

  Each configuration will be described. As the optical sheet 61, for example, a polarizing sheet that polarizes light emitted from the diffusion plate 8 is used. In addition, any liquid crystal panel can be used as the liquid crystal panel 62, but since the optical sheet 61 and the liquid crystal panel 62 are related, the type of the optical sheet 61 depends on what is used for the liquid crystal panel 62. Need to change.

  If formed as described above, deformation or breakage does not occur when the light source 30 is arranged, and the operation of arranging a plurality of light sources is facilitated, so that the liquid crystal display device can be easily manufactured. Further, since a plurality of fluorescent tubes can be arranged without deformation, the distance between the fluorescent tubes does not change, and a liquid crystal display device in which luminance spots are less likely to occur can be obtained.

  Furthermore, since the liquid crystal display device 60 generally requires a display screen with uniform brightness, in this case as well, as described above, the regulating body 20 which is a member on the diffusion plate 8 side of the light source support device 1 is transparent. To form. If comprised in this way, since the light emitted from the light source 30 is not blocked | interrupted by the member close | similar to the diffuser plate 8, it can be set as the liquid crystal display device by which the brightness spot resulting from it does not generate | occur | produce.

  Similarly, the mounting body 10 is preferably formed transparently from the viewpoint of preventing luminance unevenness. However, if the locking portion 13 is transparent, light is transmitted to the side opposite to the light source 30 arrangement side of the reflecting plate 36, and therefore light transmission prevention means similar to those shown in FIGS. 5 to 7 are required. . By providing this light transmission preventing means, it is possible to prevent light from being transmitted to the side of the reflecting plate 36 opposite to the light source 30 arrangement side.

  Various modifications can be made to the embodiment described above. For example, although an example in which the mounting body 10 and the regulating body 20 are formed separately is described, one end is connected by a hinge to be integrally formed, and the mounting body 10 and the regulating body 20 are engaged. The operation of stopping and attaching the light source 30 may be fixed by connecting one of the placing body 10 and the regulating body 20 by rotating one of them. However, in this case, it is necessary to devise the relationship between the protrusion 15 and the through hole 25 and to form the protrusion 15 so as to be able to pass through the through hole 25 by rotation.

  In each of the above embodiments, the locking piece 14 is arranged on the mounting body 10 and the locked piece 24 is arranged on the regulating body 20. However, the locking piece 14 is arranged on the regulating body 20. Of course, the locked piece 24 may be disposed on the mounting body 10.

  The present invention can be used in a non-luminous display such as a liquid crystal display device.

The front view which shows the whole light source support apparatus 1 of 1st Embodiment. (A) is the projection which projected the surface by the side of the mounting part 12 of the mounting body 10. FIG.

  (B) is a front view of the mounting body 10.

  (C) is the projection which projected the surface by the side of the latching | locking part 13 of the mounting body 10. FIG.

(D) is a side projection view of the mounting body 10.
(A) is a front view of the regulating body 20.

FIG. 6B is a projection view in which a surface of the restriction body 20 on the restriction portion arrangement side is projected.
Sectional drawing which shows the state which made the light source support apparatus 1 support the light source. The schematic sectional drawing which shows the light source support apparatus of 2nd Embodiment. The schematic sectional drawing which shows the other example of the light source support apparatus of 2nd Embodiment. The schematic sectional drawing which shows the other example of the light source support apparatus of 2nd Embodiment. Sectional drawing which shows a part of illuminating device of 3rd Embodiment. Sectional drawing which shows a part of liquid crystal display device of this invention described in 4th Embodiment. The attachment figure of the light source support device concerning a prior art.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Light source support apparatus 10 Mounting body 11 Base body 12 Mounting part 13 Locking part 14 Locking piece 15 Protrusion 20 Control body 21 Base body 22 Control part 24 Locked piece 25 Through-hole 30 Light source 50 Illumination device 60 Liquid crystal display device

Claims (5)

A light source mounting body for mounting a light source supported at substantially both ends by a support unit between the support units,
A base, and a mounting portion provided on the base for mounting the light source;
The mounting portion is formed of a pair of protrusions that are gradually spaced from a joint portion with the base to a tip toward the light source arrangement side in a state where the base is attached to a mounting plate. A light source mounting body having a shape in which the tip protrudes from the light source when placed. The light source mounting body according to claim 1 , wherein the base includes a plurality of mounting portions. To the substrate, the light source mounting body according to claim 1 or 2, characterized in that a projection which projects from the light source to the light source arrangement side. An illumination device comprising the light source mounting body according to any one of claims 1 to 3 . A liquid crystal display device comprising the lighting device according to claim 4 and a liquid crystal panel.

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