JP4720557B2 - LIGHTING DEVICE, LIQUID CRYSTAL DISPLAY DEVICE, AND ELECTRONIC DEVICE - Google Patents

Description

  The present invention relates to a lighting device, a liquid crystal display device, and an electronic apparatus.

  2. Description of the Related Art Conventionally, as a lighting device that illuminates a liquid crystal screen such as a mobile phone, there is a lighting device using an LED (Light Emitting Diode) and a light guide made of acrylic, polycarbonate, or the like. In this illuminating device, a plurality of LEDs are arranged on the end face (incident surface) side of the light guide, and light emitted from each of these LEDs is incident on the light guide from the incident surface. The light is dispersed and emitted from the emission surface.

As described above, the lighting device including the light guide includes a light source substrate having a light source, a light guide, a heat dissipation plate, a light shielding sheet, and the like in a frame, and the light source substrate is interposed between the light guide and the heat dissipation plate. It is known that it is possible to suppress the non-uniformity of the temperature distribution of the lighting device due to the heat generated by the light source. (For example, refer to Patent Document 1.)
Japanese Patent Laying-Open No. 2005-107721

  However, since the frame in the conventional lighting device as described above is generally made of plastic, there is a concern about strength (rigidity). As a countermeasure, a metal frame has been proposed, but since the whole is made of metal, the light guide held by the frame is cracked or chipped, which may cause an electrical short circuit. was there. Therefore, a method has been adopted in which another part is added to the light guide or the frame to improve the rigidity of the frame. However, since the separate parts are provided, the number of parts increases and the overall external dimensions of the apparatus increase, resulting in a problem that it is difficult to reduce costs and reduce size.

  The present invention has been made in consideration of the above-described conventional problems, and an object thereof is to provide an illumination device, a liquid crystal display device, and an electronic apparatus that can improve the rigidity of the frame itself while ensuring insulation. Yes.

An illumination device according to the present invention is a lighting device including a light source and a light guide that guides light emitted from the light source, and at least a part of the frame that holds the light source and the light guide is a skeleton. and a resin layer covering the parts and around the skeleton, the rigidity skeleton as compared to the resin layer is rather high, the opening is provided in the resin layer to expose the portion of the skeleton from the opening consisting of Te ground connection terminal is Ru provided.

According to such a configuration, since the periphery of the skeleton part is covered with the resin layer, the rigidity of the frame can be significantly improved. For example, the number of parts can be reduced as compared with a conventional method of securing rigidity by adding another part to a resin frame, and the rigidity of the frame can be easily improved with a simple configuration. Further, since the assembly efficiency is improved, the manufacturing cost can be reduced and the outer size of the frame itself can be reduced (formed in the conventional size), so that the product can be reduced in size. In addition, the resin layer made of a material having a lower rigidity than the skeleton prevents damage to the light guide held by the frame, thereby improving manufacturing efficiency and product reliability and durability. Sexuality is enhanced. In addition, since the electrical vibration (noise) of the apparatus can be removed, the reliability of the product can be improved.

Moreover, in the illuminating device of this invention, you may form a frame | skeleton part in frame shape along the shape of a flame | frame.
According to such a configuration, the rigidity of the frame can be made higher, and a part of the frame can be prevented from being damaged.

Moreover, you may comprise by forming the said resin layer on the surface of a frame | skeleton part.
According to such a configuration, since the frame portion having a higher rigidity than the resin layer can be provided in the frame, the rigidity of the frame is ensured more reliably than in the past.

In the lighting device of the present invention, the skeleton may be formed of a conductive material containing magnesium, carbon, or stainless steel, and the resin layer may be formed of an insulating material.
According to such a configuration, by forming the skeleton portion with the conductive material magnesium, carbon, or stainless steel, the rigidity of the frame can be remarkably increased and the desired shape can be easily processed. Among these, magnesium is highly practical because it is lightweight. In addition, since the resin layer is formed of an insulating material, it is possible to reliably ensure the insulating properties of the frame having a skeleton portion made of a conductive material.

The liquid crystal display device according to the present invention may be provided with a substrate on which a light source is mounted, and a ground terminal on the substrate may be connected to a ground connection terminal.
According to such a configuration, electrical vibration (noise) caused by the light source can be removed, so that the reliability of the product can be further improved.

In the liquid crystal display device according to the present invention, the skeleton may be formed of ceramics, and the resin layer may be formed of an insulating material.
According to such a structure, since the frame portion is made of ceramics, the weight of the frame can be reduced. Furthermore, even if the skeleton part is a ceramic material having semiconductivity, the surface is covered with a resin layer made of an insulating material, so that the rigidity of the frame can be increased and the insulation can be ensured reliably.

In addition, a liquid crystal display device according to the present invention includes the above-described illumination device, and is configured to irradiate a liquid crystal panel with light emitted from a light guide provided in the illumination device.
With such a feature, the same operation and effect as those of the lighting device described above can be obtained, so that durability and reliability can be improved, and a small-sized liquid crystal display device can be provided at low cost.

Further, an electronic apparatus according to the present invention is characterized in that the above-described liquid crystal display device is mounted.
With such a feature, the same operation and effect as those of the above-described lighting device and liquid crystal display device can be obtained, and thus an electronic device that realizes comfortable display can be provided.

  Hereinafter, embodiments of a lighting device, a liquid crystal display device, and an electronic apparatus according to the present invention will be described with reference to the drawings.

[Lighting device]
First, the structure of the illuminating device 1 in this Embodiment is demonstrated.
FIG. 1 is an exploded perspective view showing a schematic configuration of a lighting device 1 according to the present embodiment.
As shown in FIG. 1, the illumination device 1 according to the present embodiment includes a frame 2, a heat radiating plate 3, a light reflecting sheet 4, a plurality of light sources 6 mounted on a substrate 5, and a light guide plate 7. (Light guide), optical filter 8 and light shielding sheet 9 are included.

  The frame 2 is a frame-shaped component for holding the light guide plate 7 and is made of, for example, a resin such as polycarbonate, fluorine resin, or ABS. An inner opening 2a is provided inside the frame 2, and frame portions 2b, 2c, 2d, and 2e are provided so as to surround the inner opening 2a. In the example shown in FIG. 1, a rectangular frame is formed by a plurality of linear frame portions 2b to 2e, and a rectangular inner opening 2a is formed inside. The outer surface of the frame 2 is provided with a plurality of protruding locking portions 2f, 2g, 2h, and 2i that are locked to locked portions 3j to 3l of the heat radiating plate 3, which will be described later. The locking portions 2g to 2i are not shown in FIG. 1, but have the same configuration as the locking portion 2f shown in FIG. 1, and in FIG. 1, the locking portions 2g to 2i are formed at positions where they are formed. The code | symbol is attached | subjected.

2 is a partially enlarged plan view showing the configuration of the fixing hook portion 23 in the present embodiment, and FIG. 2 is a cross-sectional view taken along the line A-A shown in FIG.
The frame 2 in the present embodiment incorporates a skeleton portion 28 having an L shape in a side sectional view in FIG. The skeleton 28 is made of a metal material or a non-metal material, and is formed by die-casting using a rigid material such as magnesium (Mg), stainless steel, ceramics, carbon, and the like so as to follow the form of the frame 2. It is formed into a shape. In the present embodiment, magnesium is used to improve not only the rigidity of the frame 2 but also the ease of manufacturing (processing) and the weight of the apparatus. The frame 2 is formed by covering the entire skeleton 28 with an insulator layer 29 (resin layer) made of a resin such as polycarbonate, ABS, or a fluororesin. In other words, the conductive layer described above is contained in the insulator layer 29. It has a structure in which a skeleton portion 28 made of a functional material is built-in. The insulator layer 29 is formed in a form as shown in FIG. 1 by injection molding one of the resin materials described above to the outer peripheral portion of the frame 2 with the skeleton portion 28 disposed in the mold. . Thus, the skeleton 28 and the insulator layer 29 are combined and integrated with each other by double injection molding.

  With such a configuration, the rigidity of the frame 2 can be remarkably improved, and the insulating property of the frame 2 can be ensured by the insulator layer 29, so that the light guide plate 7 held by the frame 2 is a skeleton. There is no concern that the contact with the portion 28 causes a crack or a chip, and an electrical short circuit occurs between them.

  In the above description, the cross-sectional shape of the skeleton 28 is L-shaped. However, the present invention is not limited to this, and may be C-shaped or other shapes. The shape of the skeleton 28 is set according to the material to be formed, and is formed into a shape suitable for the degree of rigidity of the selected material. Further, the position of the fixing hook portion 23 is not limited to the position shown in FIG. 1, and it is preferable that the fixing hook portion 23 be formed at a location suitable for mounting on the mounting device side.

  As shown in FIGS. 1 and 2, the predetermined frame portions 2 c and 2 d of the frame 2 are provided with a fixing hook portion 23 having a rectangular frame shape for fixing the lighting device 1 to the mounting device side. It has been. The fixing hook portion 23 is formed integrally with the frame portions 2c and 2d so as to project in directions opposite to each other and shift their positions in the extending direction of the frame portions 2c and 2d. The portion has a rectangular hole 25 having a rectangular shape. In the rectangular hole 25, for example, a component on the mounting device side can be engaged. These fixing hook portions 23 constitute a rectangular hole 25 and are parallel to the corresponding frame portion 2c or frame portion 2d to provide a claw portion 26 for ensuring fixation on the mounting device side. Provided. The claw portion 26 extends in the mounting direction side of the lighting device 1, and the mounting portion 27 for engaging with the mounting device side is formed at the tip portion thereof, so that the lighting device 1 can be mounted favorably. And

  The frame 2 b of the frame 2 has a first pressing portion 10 that presses the light emitting surface 6 a of the light source 6 mounted on the substrate 5 against the incident surface 7 a of the light guide plate 7, and the light guide plate 7 is pressed against the frame 2. A second pressing portion 11 is provided. The first pressing unit 10 functions to urge the light sources 6 to the incident surface 7a side of the light guide plate 7, and the second pressing unit 11 functions to urge the light guide plate 7 to the frame 2 side. . Thus, since the light emitting surface 6a of the light sources 6 is pressed against the incident surface 7a of the light guide plate 7 by the first pressing portion 10, the light emitting surfaces 6a of the light sources 6 and the light guide plate 7 are pressed by the first pressing portion 10. The correlation position with the incident surface 7a can be stabilized. Further, when the light guide plate 7 is pressed against the frame 2 by the second pressing portion 11, rattling of the light guide plate 7 with respect to the frame 2 is suppressed, and the positional accuracy of the light guide plate 7 with respect to the frame 2 is improved. Therefore, the correlation position between the light source emission surface and the light guide plate entrance surface can be further stabilized, and the luminance and light emission efficiency of the illumination device 1 can be more stably and improved. Further, the light guide plate 7 is unlikely to be detached from the frame 2 at the time of impact, and the rugged lighting device 1 can be obtained.

  Further, the frame 2b of the frame 2 is formed with an opening for connecting a ground terminal of the light source 6 to be described later and the skeleton 28. Although the opening is not shown in FIG. 1, for example, it is preferably formed at a predetermined position on the back surface side of the frame portion 2 b facing the substrate 5, and is not formed on the surface side in contact with the light guide plate 7. Thus, the skeleton portion 28 is configured to avoid contact with the light guide plate 7. With such a configuration, a part of the skeleton 28 is exposed outside in the opening.

  As shown in FIG. 1, the heat radiating plate 3 is a plate-like component made of a metal material such as aluminum, copper, or stainless steel, or a material other than a metal with good thermal conductivity, which is attached to the frame 2. The heat sink 3 has a plate surface 3a that covers the inner opening 2a of the frame 2, and the outer edge of the heat sink 3 has a shape corresponding to the frame portions 2b to 2e. Further, folded portions 3b, 3c, 3d, 3e, 3f, 3g, and 3h raised from the plate surface 3a are provided on the outer edge portion of the heat radiating plate 3 so as to surround the plate surface 3a. The frame 2 is fitted into the folded portions 3b to 3h, and the folded portions 3b to 3h are engaged with the outer surfaces of the frame portions 2b to 2e of the frame 2, respectively. Of the folded portions 3b to 3h of the heat radiating plate 3, the folded portions 3c, 3e, 3f, and 3h at positions corresponding to the locked portions 2f to 2i of the frame 2 are connected to the locked portions 2f to 2h of the frame 2. Locked portions 3i, 3j, 3k, 3l for locking 2i are provided, respectively. These locked portions 3i to 3l are openings into which the locking portions 2f to 2i of the frame 2 are respectively fitted, and the locking portions 2f to 2i of the frame 2 are fitted to these locked portions 3i to 3l. The heat radiating plate 3 is integrally attached to the frame 2 by being locked.

  On the other hand, a light source substrate 12 (see FIG. 4) in which light sources 6 are mounted on a substrate 5 is attached to the frame 2. The substrate 5 constituting the light source substrate 12 is a belt-like substrate extending along the frame portion 2b of the frame 2, and it is preferable to use, for example, an FPC whose base material is polyimide resin or the like. By using the FPC, the thickness of the substrate 5 can be reduced, and the adhesion to other members can be improved. However, it is possible to use a substrate other than the FPC as the substrate 5, and for example, a hard substrate made of a phenol resin, a glass epoxy resin, or the like may be used.

FIG. 3 is an enlarged plan view showing the substrate 5 on which the light sources 6 are mounted.
As shown in FIGS. 1 and 3, the substrate 5 described above has rectangular island portions 5a, and strip-shaped connecting portions 5b having a narrower width than the island portions 5a. The two island portions 5a are connected to each other via connecting portions 5b. That is, the substrate 5 has a shape in which the wide island portions 5a and the narrow connection portions 5b are alternately arranged, and the longitudinal sides of the substrate 5 are uneven.

  The plurality of light sources 6 mounted on the substrate 5 are members that emit light, and are mounted on the island portions 5a of the substrate 5 and arranged in a row at intervals. The light sources 6 are preferably fixed on the island portion 5a of the substrate 5 by SMT mounting, but may of course be fixed to the substrate 5 by other mounting methods. The light sources 6 are arranged with their light emitting surfaces 6a facing in a direction orthogonal to the longitudinal direction of the substrate 5, respectively. As the light sources 6..., It is preferable to use, for example, a high-intensity light source such as an LED. Of course, other light sources other than the LED, such as a cold cathode tube, can also be used.

  The substrate 5 on which the plurality of light sources 6 are mounted is joined to the frame portion 2 b of the frame 2. Specifically, as shown in FIG. 3, adhesive portions 13 such as a double-sided tape are provided on the upper surface of the island portion 5a of the substrate 5 (the surface on the side where the light sources 6 are mounted). The island portion 5a of the substrate 5 is adhesively bonded to the back surface (the surface on the heat dissipation plate 3 side) of the frame portion 2b of the frame 2. In this state, the light sources 6 mounted on the substrate 5 are fitted into the second pressing portion 11, and the first pressing portion 10 is connected to the back surface 6b of the light sources 6 (on the opposite side of the light emitting surface 6a). Surface).

  A ground terminal of a driving IC for driving the light source 6 is formed on the upper surface of the island portion 5a on the substrate 5. When the substrate 5 is incorporated in the frame 2, it is exposed from the opening of the frame 2 described above. A ground terminal is connected to the skeleton part 28, and is grounded from the mounting device side through a ground wire or the like connected to the skeleton part 28, for example. As a result, it is possible to effectively remove electrical vibrations caused by the driving ICs of the light sources 6 mounted on the substrate 5, that is, noise and the like.

  As described above, the light source substrate 12 is joined to the frame 2 and the heat radiating plate 3 is attached to the frame 2, so that the frame portions 2b to 2e of the frame 2 are peripheral walls with the plate surface 3a of the heat radiating plate 3 as the bottom surface. A container is formed. Inside the container, a plurality of light sources 6 are disposed along the frame portion 2b of the frame 2, and as shown in FIG. 1, a light reflecting sheet 4, a light guide plate 7, an optical filter 8, a light shield, The sheets 9 are accommodated in a state where they are sequentially stacked.

  As shown in FIG. 1, as the light reflecting sheet 4, for example, a surface of a resin base material such as PET (polyethylene terephthalate) coated with a metal film such as Al, Ag, or Cr can be used. As long as this light reflection sheet 4 has a light reflection layer in the light-guide plate 7 side, what kind of thing may be sufficient as it. Further, instead of the light reflecting sheet 4, a light reflecting film deposited on the plate surface 3 a of the heat radiating plate 3 can be used as the light reflecting layer. The light reflecting layer can be made of a metal such as Al, Ag, Cr, or Ni or an alloy mainly composed of these metals.

  The light guide plate 7 is a thin plate-like light guide member capable of propagating light therein. For example, a transparent acrylic plate printed with a white pigment or a transparent acrylic plate on one side (uneven surface 7d). A thing provided with many fine holes (or projections) can be used. The light guide plate 7 has a side end surface that extends along the arrangement direction of the plurality of light sources 6 and faces the light sources 6. The side end surface is used as an incident surface 7a. The light guide plate 7 has a plane that is formed orthogonal to the incident surface 7a and faces the optical filter 8, and this plane is used as the output surface 7b. In this light guide plate 7, light emitted from the light emitting surface 6a of the light source 6 ... enters the light guide plate 7 from the incident surface 7a, and the incident light is dispersed and dispersed by the uneven surface 7d of the light guide plate 7. Light is emitted from the emission surface 7b.

  The optical filter 8 is a light diffusing plate or a light collecting plate disposed on the light exit surface 7b of the light guide plate 7 as necessary, and a plurality of optical filters 8 can be stacked as necessary. Alternatively, the optical filter 8 such as a light collecting plate may be omitted.

  The light shielding sheet 9 is a frame-like sheet that is directly disposed on the optical filter 8 or the light exit surface 7 b of the light guide plate 7. According to the light shielding sheet 9, it is possible to cover a region overlapping with the outer edge portion of the light guide plate 7, and to define an irradiation region of the lighting device 1 inside thereof. That is, the light shielding sheet 9 shields the outer edge portion of the light exit surface 7b of the light guide plate 7 where the illuminance of the illuminating light is highly varied, and forms an irradiation region on the inner side where a relatively uniform illuminance is obtained.

Next, an example of the manufacturing method of the illuminating device 1 which consists of an above-described structure is demonstrated.
First, a step of die-casting the skeleton 28 into a frame shape using magnesium is performed. Next, the step of placing the skeleton portion 28 in the mold and injection molding the insulator layer 29 on the outer peripheral portion of the skeleton portion 28 using polycarbonate is performed, and the skeleton portion 28 is built in the insulator layer 29. . At that time, an opening is formed at a predetermined position of the frame 2b in the frame 2, and a part of the skeleton 28 is exposed from the opening. Next, a process of manufacturing a light source substrate 12 by mounting a plurality of light sources 6 on the substrate 5 is performed, the substrate 5 is bonded to the frame portion 2b of the frame 2 via the bonding portion 13, and the light source substrate is attached to the frame 2. The process of joining 12 is performed. Subsequently, a step of connecting the ground terminal on the substrate 5 to the skeleton 28 in the opening of the frame 2 is performed. Then, the process which attaches the heat sink 3 to the flame | frame 2 and forms a container is performed. Then, the light reflecting sheet 4 is laid on the plate surface 3 a of the heat radiating plate 3, and the light guide plate 7 is fitted and attached to the inside of the frame 2 so as to be placed on the light reflecting sheet 4. Finally, a step of sequentially installing the optical filter 8 and the light shielding sheet 9 on the light exit surface 7b of the light guide plate 7 is performed. In addition, the illuminating device 1 which consists of an above-described structure can be manufactured also by manufacturing methods other than the method mentioned above, and can also be manufactured by well-known manufacturing methods other than an above-described manufacturing method.

Next, the effect of the illuminating device 1 which consists of an above-described structure is demonstrated.
According to the illuminating device 1 having the above-described configuration, since the skeleton portion 28 made of a conductive material is built in the insulator layer 29 of the frame 2, the insulating property of the frame 2 is ensured while the frame 2 is secured. The rigidity of the frame 2 itself can be remarkably improved. Further, since the skeleton portion 28 is formed in a frame shape along the shape of the frame 2, a rigid member is incorporated not only partially but around the entire circumference of the frame 2. Can be significantly increased. Conventionally, another part is added to the resin frame, but according to the present embodiment, the rigidity of the frame 2 can be improved with a simple configuration without increasing the number of parts, and the frame 2 Can be kept to a minimum size.

Further, the insulator layer 29 can relieve stress on the light guide plate 7 held by the frame 2 to prevent the light guide plate 7 from being cracked or chipped, and the skeleton 28 and the light guide plate 7. Are reliably insulated from each other, so that an electrical short circuit caused by contact can be reliably prevented. In addition, since the ground terminal on the substrate 5 is connected to the skeleton 28 exposed from the opening of the insulator layer 29, electrical vibration (noise) due to the light source 6 can be removed. Enable good display.
In addition, since the lighting device 1 is not detached from the mounting device by the fixing hook portion 23, the reliability and the life of the product can be increased.

[Liquid Crystal Display]
Next, the liquid crystal display device 50 in the present embodiment will be described.
FIG. 4 is a cross-sectional view showing the liquid crystal display device 50 in the present embodiment.
As shown in FIG. 4, the liquid crystal display device 50 is a liquid crystal display device including the above-described illumination device 1, and includes a passive matrix type liquid crystal display device or an active matrix type liquid crystal display device. The active matrix type liquid crystal display device described above is a liquid crystal display device including, for example, a TFT (thin film transistor) or a TFD (thin film diode) as a switching element. The liquid crystal display device 50 is configured to irradiate the liquid crystal panel 51 with light emitted from the light emission surface 7 b of the light guide plate 7 provided in the lighting device 1. Specifically, the liquid crystal panel 51 is arranged to face the light shielding sheet 9 of the lighting device 1, and the holding frame 52 is attached to the frame 2 from above the liquid crystal panel 51.

  The liquid crystal panel 51 is a panel in which a pair of substrates 53 and 54 made of glass, plastic, or the like are bonded together with a sealing material (not shown), and an electro-optical material, for example, liquid crystal is disposed between the substrates 53 and 54. Usually, one substrate 53 is provided with a substrate overhang 53a that projects outward from the outer shape of the other substrate 54, and an input terminal portion or the like is formed on the substrate overhang 53a. In the example shown in FIG. 4, a semiconductor IC 55 incorporating a drive circuit or the like is mounted on the substrate extension 53a. In addition, although a polarizing plate, a phase difference plate, etc. are arrange | positioned on the outer surface of the board | substrates 53 and 54, illustration is abbreviate | omitted about these.

  The holding frame 52 is configured to expose the display area of the liquid crystal panel 51 and to support the outer edge of the liquid crystal panel 51 from above. The holding frame 52 is provided with a plurality of engaged portions (not shown), and the plurality of engaging portions engage with the locking portions 2o, 2p, 2q, and 2r shown in FIG. Thus, the holding frame 52 is fixed to the frame 2. As a result, the liquid crystal panel 51, the holding frame 52, the lighting device 1 and the like are integrated to form the liquid crystal display device 50. The locking portions 2q and 2r described above are not shown in FIG. 1, but have the same configuration as the locking portions 2o and 2p shown in FIG. 1, and the locking portions 2q and 2r are formed in FIG. Reference numerals are attached to the positions to be performed.

  According to the liquid crystal display device 50 having the above-described configuration, the above-described illumination device 1 is provided, so that the liquid crystal display device 50 that is displayed with uniform and sufficient brightness and high visibility can be realized. .

[Electronics]
Next, electronic device 100 in the present embodiment will be described.
FIG. 5 is a schematic configuration diagram showing the configuration of the display system of the present embodiment.
As shown in FIG. 5, the electronic device 100 is configured to include the liquid crystal display device 50 and the display control circuit 110 described above. Note that a drive circuit 56 is configured by the semiconductor IC 55 shown in FIG. 4 provided in the liquid crystal display device 50.
The display control circuit 110 includes a display information output source 111, a display information processing circuit 112, a power supply circuit 113, a timing generator 114, and a light source control circuit 115.

  The display information output source 111 includes a memory such as a ROM (Read Only Memory) or a RAM (Random Access Memory), a storage unit such as a magnetic recording disk or an optical recording disk, and a tuning circuit that tunes and outputs a digital image signal. The display information is supplied to the display information processing circuit 112 in the form of an image signal of a predetermined format based on various clock signals generated by the timing generator 114.

  The display information processing circuit 112 includes various known circuits such as a serial-parallel conversion circuit, an amplification / inversion circuit, a rotation circuit, a gamma correction circuit, and a clamp circuit, and executes processing of input display information to obtain image information. Are supplied to the drive circuit 56 of the liquid crystal display device 50 together with the clock signal CLK. The drive circuit 56 includes a scanning line drive circuit, a signal line drive circuit, and an inspection circuit. The power supply circuit 113 supplies predetermined voltages to the display information output source 111, the display information processing circuit 112, the timing generator 114, the light source control circuit 115, the drive circuit 56, and the like.

  The light source control circuit 115 supplies power supplied from the power supply circuit 113 to the light source substrate 12 of the lighting device 1 based on a control signal introduced from the outside. The light emitted from each light source 6 of the light source substrate 12 is incident on the incident surface 7a shown in FIG. 1 of the light guide plate 7, and is irradiated to the liquid crystal display device 50 from the emission surface 7b shown in FIG. The light source control circuit 115 controls lighting / non-lighting of the light sources 6 of the light source board 12 according to the control signal. It is also possible to control the luminance of each light source 6.

FIG. 6 is a perspective view showing an appearance of a mobile phone 1000 which is an example of the electronic apparatus 100 described above.
As illustrated in FIG. 6, the mobile phone 1000 includes an operation unit 1001 and a display unit 1002, and a circuit board 1003 is disposed inside the housing of the display unit 1002. The liquid crystal display device 50 is mounted on the circuit board 1003. And it is comprised so that the display screen of the said liquid crystal panel 51 can be visually recognized in the surface of the display part 1002. FIG.

  According to the electronic device 100 having the above-described configuration, since the liquid crystal display device 50 described above is mounted, the electronic device 100 that realizes comfortable display can be provided.

The embodiments of the lighting device, the liquid crystal display device, and the electronic apparatus according to the present invention have been described above. However, the present invention is not limited to the above-described embodiments, and can be appropriately changed without departing from the spirit of the present invention. It is.
In the above embodiment, it has been described that the insulator layer 29 is formed on the skeleton portion 28 by double injection molding. However, a resin such as a fluororesin is formed on the outer peripheral portion of the skeleton portion 28. It may be formed by (coating). Moreover, although the 2nd pressing part 11 for fixing the light-guide plate 7 to the flame | frame 2 is provided, the illuminating device which is not provided with the 2nd pressing part may be sufficient as this invention. In addition, the constituent elements of the above-described embodiment can be replaced with known constituent elements without departing from the gist of the present invention, and the above-described modified examples may be appropriately combined.

In the above-described embodiment, the illumination device 1 is mounted on the liquid crystal display device 50 that displays an image, information, and the like. However, the illumination device according to the present invention emits predetermined light to the irradiated object. It may be a thing.
In the embodiment described above, the mobile phone 1000 is exemplified as the electronic device 100. However, the present invention is not limited to the personal computer, the liquid crystal television, the viewfinder type or the monitor direct view type video tape recorder, the car navigation device, the pager. It may be an electronic device such as an electronic notebook, calculator, word processor, workstation, video phone, POS terminal, or digital wristwatch.

It is a disassembled perspective view of the illuminating device in embodiment which concerns on this invention. It is AA sectional drawing of the hook part for fixation shown in FIG. It is a top view of the board | substrate in embodiment which concerns on this invention. It is sectional drawing of the liquid crystal display device in embodiment which concerns on this invention. It is a schematic block diagram of the electronic device in embodiment which concerns on this invention. It is an external appearance perspective view of the electronic device in embodiment which concerns on this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Illuminating device, 2 ... Frame, 5 ... Board | substrate, 5a ... Island part, 5b ... Connection part, 6 ... Light source, 6a ... Light-emitting surface, 7 ... Light guide plate (light guide), 7a ... Incident surface, 7b ... Outgoing Surface 10, first pressing portion 11, second pressing portion 23, fixing hook portion 25, rectangular hole 26, claw portion 27, engaging portion 28, skeleton portion 29, insulator Layer (resin layer), 50 ... Liquid crystal display device, 51 ... Liquid crystal panel, 100 ... Electronic equipment

Claims (8)

A light source;
A light guide that guides light emitted from the light source,
At least a part of the frame that holds the light source and the light guide includes a skeleton part and a resin layer that covers the periphery of the skeleton part,
Rigidity the skeleton as compared to the resin layer is rather high,
An illuminating device in which an opening is provided in the resin layer, and a ground connection terminal formed by exposing a part of the skeleton from the opening . The skeleton is the illumination apparatus 請 Motomeko 1, wherein along the shape of the frame that is formed in a frame shape. Wherein the frame, the illumination apparatus 請 Motomeko 1 or 2, wherein that consists in the fact that the resin layer is formed on the surface of the skeleton. The skeleton is magnesium, it is formed of a conductive material containing carbon or stainless steel, the resin layer, the lighting apparatus according to any one of 3 from 請 Motomeko 1 that will be formed by an insulating material.   A substrate on which the light source is mounted;
  The lighting device according to claim 1, wherein a ground terminal on the substrate is connected to the ground connection terminal.   The lighting device according to any one of claims 1 to 3, wherein the skeleton portion is formed of ceramics, and the resin layer is formed of an insulating material.   A liquid crystal display device comprising the illuminating device according to any one of claims 1 to 6 and configured to irradiate a liquid crystal panel with light emitted from the light guide provided in the illuminating device.   An electronic device in which the liquid crystal display device according to claim 7 is mounted.

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