JP4624328B2 - Light source component and display device including the same - Google Patents

Description

  The present invention relates to a light source component in which a light source is detachable and a display device including the same.

Currently, liquid crystal display devices are widely used in general equipment because they are thinner and consume less power than conventional cathode ray tube display devices. In order not to emit light by itself, a light source for making light incident on the liquid crystal display panel is necessary. Therefore, the liquid crystal display device is provided with a light source component called a backlight. Currently, a cold cathode discharge tube (hereinafter referred to as “CCFL”) is generally used as a light source of a backlight. However, mercury is used in CCFL, and it is required to switch to an alternative light source in consideration of the environment. Therefore, instead of CCFL, a backlight (hereinafter referred to as “LED backlight”) including a light emitting diode (hereinafter referred to as “LED”) as a light source has been developed and disclosed in, for example, Patent Document 1.
JP 2005-038771 A

  However, the LED backlight of Patent Document 1 has a new problem due to the light source characteristics of the LED. This new problem will be described below by taking an Nichia LED (NSCW455) as an example. NSCW 455 has an estimated life of about 12000 hours when driven in a room temperature (25 ° C.) environment, whereas the estimated life of NSCW 455 is about 5500 hours when driven in an environment of 50 ° C. That is, if the NSCW 455 is continuously driven at a high temperature, the LED chip itself and the sealing resin for sealing the LED chip are deteriorated, so that the life is shortened. Therefore, the driving time of the LED backlight provided with the NSCW 455 is also shortened as the life of the NSCW 455 is shortened.

  Further, the deterioration of the light source characteristics of the light source itself provided by the backlight by driving the backlight at a high temperature is not limited to the LED described by taking NSCW 455 as an example, but also in other light sources. Has occurred. For example, when the halogen lamp is driven at a high temperature, the evaporation amount of tungsten used for the filament responsible for the light emission of the halogen lamp increases, and the life of the halogen lamp is shortened. In addition, when the CCFL is driven at a high temperature, the vapor pressure of mercury inside the CCFL becomes excessively high, and the light emission efficiency of the CCFL decreases.

  The present invention has been conceived under such circumstances, and a light source component capable of driving at least one of the light source characteristics of the light source itself in a sufficiently high state, and a display including the same An object is to provide an apparatus.

  The light source component according to the present invention has one or a plurality of light sources, a light guide plate that guides light incident from the light source so as to be emitted from one main surface, and a through hole that faces the light guide plate, and generates heat generated by the light source. A heat dissipating member for dissipating heat to the outside; and an attaching means for removably attaching the light source to the heat dissipating member, at least a part of which is fitted in the through hole of the heat dissipating member. Yes.

  In this light source component, it is preferable that the light guide plate communicates with the through hole of the heat radiating member and has an accommodating portion for accommodating the light source.

  In the present light source component, it is preferable that the accommodating portion is formed so as to individually accommodate or collectively accommodate a plurality of light sources.

  It is preferable that the light source component further includes a mounting member for mounting a plurality of light sources.

  In this light source component, it is preferable that the mounting member is in contact with the light guide plate.

  In the present light source component, the light source is preferably a light emitting diode.

  A display device according to the present invention includes the above-described light source component according to the present invention and a display panel disposed to face one main surface of the light guide plate of the light source component.

  The light source component according to the present invention has a through hole facing the light guide plate, and is configured so that at least a part of the heat radiation member for radiating heat generated by the light source to the outside is fitted in the through hole of the heat radiation member. Since the attachment means is provided, a sufficient contact area between the heat dissipation member and the attachment means can be secured. Therefore, in this light source component, the heat generated by the light source can be efficiently conducted to the heat radiating member via the attachment means, and the temperature of the light source can be prevented from rising due to the heat generated by the light source. Therefore, in this light source component, by increasing the heat dissipation of the light source, it is possible to drive at least one of the light source characteristics that deteriorates when the light source becomes high in a sufficiently high state. Note that examples of the light source characteristic include a life characteristic relating to the life of the light source and a light emission characteristic relating to light emission of the light source such as light emission efficiency.

  In addition, the attachment means for the light source component is configured such that the light source can be attached to and detached from the heat radiating member. Therefore, in this light source component, it is possible to replace the light source that has become unable to obtain a desired light emission amount with a new light source by removing the attachment means from the heat radiating member. Therefore, in this light source component, the drive time exceeding the lifetime of the light source alone can be ensured by replacing the light source in a timely manner.

  In this light source component, when the light guide plate communicates with the through hole of the heat radiating member and has a housing part for housing the light source, the light emitted from the light source can be more effectively taken into the light guide plate. . That is, in the light source component having this configuration, the ratio of the light incident on the light guide plate with respect to the light emitted from the light source can be increased. Therefore, the light source component of this configuration is suitable for increasing the amount of light emitted from one main surface of the light guide plate without changing the light emission amount of the light source.

  In this light source component, when the accommodating portion is formed so as to individually accommodate a plurality of light sources, the light emitted from each light source can be more effectively taken into the light guide plate. Therefore, the light source component of this configuration is more suitable for increasing the amount of light emitted from one main surface of the light guide plate without changing the light emission amount of the light source.

  In the present light source component, when the housing portion is formed so as to collectively house a plurality of light sources, the position of the light source can be arbitrarily set within the housing portion. Therefore, in the light source component of this configuration, without changing the shape of the housing portion of the light guide plate, for example, the distance between the light sources housed in the housing portion is reduced to accommodate more light sources in the housing portion, etc. The optical design can be changed.

  When the light source component further includes a mounting member for mounting a plurality of light sources, the plurality of light sources are collectively removed by removing the plurality of light sources mounted on the mounting member in a lump. Can be exchanged. Therefore, the light source component of this configuration is suitable for improving work efficiency when replacing a plurality of light sources.

  In this light source component, when the mounting member is in contact with the light guide plate, the positional relationship between the mounting member and the light source with respect to the light guide plate can be determined appropriately and easily. That is, in the light source component of this configuration, even if the light source is replaced for each mounting member, for example, the mounting member on which the new light source is mounted is merely brought into contact with the predetermined position of the light guiding plate. The positioning member, and thus the light source can be properly positioned. Therefore, in the light source component of this configuration, even when it is necessary to determine the positional relationship between the light guide plate and the light source with high accuracy in order to emit light input from the light source substantially uniformly from one main surface of the light guide plate. The positional relationship can be easily determined.

  In this light source component, when the light source is a light emitting diode, it is possible to prevent the temperature of the light emitting diode from rising, so that the life of the light emitting diode can be shortened due to continuing to drive the light emitting diode at a high temperature. It is suitable for suppression.

  Since the display device according to the present invention includes the light source component according to the present invention, the above-described effects of the light source component according to the present invention can be obtained. In other words, in this display device, by increasing the heat dissipation of the light source, it is possible to drive at least one of the light source characteristics that deteriorates when the light source becomes high in a sufficiently high state. Further, in the present display device, the driving time exceeding the lifetime of the light source alone can be ensured by replacing the light source in a timely manner.

  FIG. 1 is a cross-sectional view showing a schematic configuration of a light source component X1 according to the first embodiment of the present invention, where (a) is an overall view thereof and (b) is an enlarged view of a main part thereof.

  The light source component X <b> 1 includes a light source 10, a mounting member 20, a light guide plate 30, a heat radiating member 40, and attachment means 50.

  In this embodiment, the light source 10 includes a light emitter 11 and a connection terminal 12 and is configured to emit light to the outside. Examples of the light source 10 include a light emitting diode (LED), a cold cathode discharge tube, a hot cathode discharge tube, a halogen lamp, a xenon lamp, an incandescent lamp, an inorganic electroluminescence, and an organic electroluminescence. Adopt and explain. The light emitter 11 has a function of emitting light, and corresponds to a semiconductor element in the present embodiment. The connection terminal 12 bears a function of supplying power to the light emitter 11, and corresponds to an electrode (anode or cathode) in this embodiment. Examples of the constituent material of the connection terminal 12 include metals such as copper, aluminum, and nickel, metal alloys, a laminate of a plurality of metal materials, and solder.

  The mounting member 20 includes a mounting member main body 21 and connection terminals 22 and 23, and is for mounting a plurality of light sources 10. An example of the mounting member 20 is a wiring board.

  The mounting member main body 21 is a part mainly responsible for the function of supporting the light source 10, and is formed in a long plate shape in the present embodiment. As a constituent material of the mounting member main body 21, ceramics such as an aluminum oxide sintered body and a silicon nitride sintered body, a thermosetting type, or an ultraviolet curable type are used in order to ensure electrical insulation of the connection terminals 22 and 23. Resin, composite material of ceramic and resin, composite material of resin such as epoxy resin and glass cloth substrate, and the like.

  The connection terminals 22 and 23 are parts that have a function of supplying power to the light emitter 11. The connection terminal 22 is formed so as to be exposed on the mounting surface 21 a of the light source 10, and is electrically connected to the connection terminal 12 of the light source 10. In this embodiment, the connection terminal 23 is formed so as to be exposed at one end of the mounting member main body 21 and is electrically connected to an external power supply source (not shown). The connection terminal 22 and the connection terminal 23 are electrically connected by a wiring conductor (not shown). Examples of the constituent material of the connection terminals 22 and 23 include metals such as copper and aluminum, metal oxides such as ITO (Indium Tin Oxide) and zinc oxide, and conductive polymers such as polyaniline and polyethylenedioxythiophene.

  The light guide plate 30 is for guiding light incident from the light source 10 so as to be emitted from one main surface of the light guide plate 30. In the present embodiment, the light guide plate 30 has a housing portion 30a for individually housing the plurality of light sources 10 on the side surface thereof. The accommodating portion 30a has a shape slightly larger than the outer shape of the light source 10 in order to ensure a higher positioning property while sufficiently ensuring the ease of accommodating the light source 10. Examples of the constituent material of the light guide plate 30 include transparent resins such as acrylic resin and polycarbonate resin, and glass.

  In the present embodiment, the light guide plate 30 is provided with a diffusion sheet 31, a prism sheet 32, and a reflection sheet 33. The diffusion sheet 31 is for diffusing light so as to achieve more uniform planar light emission, and is disposed on one main surface (upper surface) of the light guide plate 30 in the present embodiment. The prism sheet 32 is for condensing light in a substantially constant direction, and is arranged on one main surface of the light guide plate 30 in the present embodiment. The reflection sheet 33 is for reflecting light, and is mainly disposed on the other main surface (lower surface) of the light guide plate 30 in the present embodiment.

  The heat radiating member 40 has a through hole 40a and is for radiating heat generated by the light source 10 to the outside (for example, an external space). In the present embodiment, the heat dissipation member 40 is formed in an L-shaped cross section, and is disposed so as to face the other main surface of the light guide plate 30 and the side surface on the side where the accommodating portion 30a is located. The through hole 40a is formed so as to face the accommodating portion 30a of the light guide plate 30, and communicates with the accommodating portion 30a. The through hole 40a is formed so that the light source 10 and the mounting member 20 can be inserted therethrough. Examples of the material constituting the heat radiating member 40 include a metal material such as copper or aluminum, a material obtained by mixing a thermosetting or ultraviolet curable resin material with a material having high thermal conductivity. Here, the material having high thermal conductivity has higher thermal conductivity than the material constituting the light guide plate 30, and examples thereof include metal materials and carbon nanotubes.

  FIGS. 2A and 2B are schematic views showing the attachment / detachment structure of the attachment means 50 for the light source component X1, wherein FIG. 2A is a perspective view thereof and FIG. In FIG. 2A, the diffusion sheet 31, the prism sheet 32, and the reflection sheet 33 are omitted from the viewpoint of easy viewing.

  The attachment means 50 is for detachably attaching the mounting member 20 on which the light source 10 is mounted to the heat radiating member 40, and includes a fitting member 51, a fixing member 52, and the heat radiating member 40. The screw hole 40b provided in is included.

  The fitting member 51 includes a mounting surface 51 a for mounting the mounting member 20, a fitting surface 51 b that fits into the through hole 40 a of the heat radiating member 40, and a communication hole 51 c that communicates with the screw hole 40 b of the heat radiating member 40. This contributes to fixing the mounting member 20 mounted on the mounting surface 51a to the heat radiating member 40. The fitting member 51 is configured such that at least a part (the entire outer periphery in this embodiment) is fitted into the through hole 40a of the heat dissipation member 40. A surface 21 b opposite to the mounting surface 21 a of the mounting member main body 21 is mounted (bonded) on the mounting surface 51 a via the bonding member 53. Examples of the bonding member 53 include a pressure-sensitive adhesive tape, an adhesive, and a low melting point metal material. From the viewpoint of efficiently transferring heat generated from the light source 10 to the fitting member 51, a heat conductive pressure-sensitive adhesive tape. Those having high heat conductivity such as heat conductive adhesive and the like are preferable. The fitting surface 51 b is a surface that contacts the surface that defines the through hole 40 a of the heat radiating member 40, and is a part that contributes to increasing the heat transfer area between the heat radiating member 40 and the fitting member 51. The communication hole 51 c is a part for allowing a screw part 52 a of the fixing member 52 described later to reach the screw hole 40 b of the heat radiating member 40. In addition, as a material which comprises the fitting member 51, the material similar to the material which comprises the heat radiating member 40 is mentioned.

  The fixing member 52 is for fixing the fitting member 51 to the heat radiating member 40 in a detachable state. The fixing member 52 in this embodiment includes a screw portion 52a that can be screwed into the screw hole 40b of the heat radiating member, and a screw head that partly contacts the fitting member 51 in a state where the screw portion 52a is screwed into the screw hole 40b. 52b, and examples thereof include screws and bolts. The constituent material of the fixing member 52 may be any material as long as the screw portion 52a can be screwed into the screw hole 40b of the heat radiating member 40 with sufficient strength. The same material as that to be used is preferable.

  The light source component X1 according to the present embodiment has a through hole 40a facing the light guide plate 30, and is fitted into the heat radiating member 40 for radiating heat generated by the light source 10 to the outside and the through hole 40a of the heat radiating member 40. Since the fitting member 51 configured to fit the surface 51b is provided, a sufficient contact area between the heat radiation member 40 and the fitting member 51 can be ensured. Therefore, in the light source component X1, heat generated in the light source 10 is efficiently conducted to the heat radiating member 40 via the fitting member 51, and the temperature of the light source 10 is prevented from rising due to the heat generated in the light source 10. Can do. Therefore, in the light source component X1, by improving the heat radiation property of the light source 10, at least one of the light source characteristics that deteriorates when the light source 10 becomes high temperature can be driven in a sufficiently high state. Examples of the light source characteristic include a life characteristic related to the life of the light source 10 and a light emission characteristic related to light emission of the light source 10 such as light emission efficiency.

  In addition, the attachment means 50 of the light source component X1 is configured so that the light source 10 can be detachably attached to the heat radiating member 40. Therefore, in the light source component X1, by removing the fitting member 51 from the heat radiating member 40, it becomes possible to replace the light source 10 that cannot obtain a desired light emission amount with a new light source. Therefore, in the light source component X1, the driving time exceeding the lifetime of the light source 10 alone can be secured by replacing the light source 10 in a timely manner. Furthermore, in the light source component X1, when the light source 10 is replaced, it is possible to easily change the characteristics of the light source component X1 resulting from the light source by replacing the light source with a light source having a different light source characteristic.

  Since the light guide plate 30 of the light source component X1 communicates with the through hole 40a of the heat radiating member 40 and has a housing portion 30a for housing the light source 10, the light guide plate 30 more effectively emits the light emitted from the light source 10. It can take in inside the storage part 30a. That is, in the light source component X1, the ratio of the light incident on the light guide plate 30 with respect to the light emitted from the light source 10 can be increased. Therefore, the light source component X1 is suitable for increasing the amount of light emitted from the one main surface of the light guide plate 30 without changing the amount of light emitted from the light source 10.

  Since the accommodating portion 30a of the light guide plate 30 of the light source component X1 is formed so as to individually accommodate the plurality of light sources 10, the light emitted from each light source 10 can be more effectively taken into the light guide plate 30. . Therefore, the light source component X1 is more suitable for increasing the amount of light emitted from one main surface of the light guide plate 30 without changing the light emission amount of the light source 10.

  Since the light source component X1 includes the mounting member 20 for mounting the plurality of light sources 10, the plurality of light sources 10 mounted on the mounting surface 21a of the mounting member 20 are collectively removed. The plurality of light sources 10 can be replaced at once. Therefore, the light source device X1 is suitable for improving work efficiency when replacing the plurality of light sources 10.

  Since the mounting member 20 of the light source component X1 is in contact with the light guide plate 30, the positional relationship of the mounting member 20 and the light source 10 with respect to the light guide plate 30 can be determined appropriately and easily. That is, in the light source component X1, for example, even if the light source 10 is replaced together with the mounting member 20, only the mounting member 20 on which the new light source 10 is mounted is brought into contact with a predetermined position of the light guide plate 30. The mounting member 20 and thus the light source 10 with respect to the optical plate 30 can be appropriately positioned. Therefore, in the light source component X1, it is necessary to determine the positional relationship between the light guide plate 30 and the light source 10 with high accuracy in order to emit light input from the light source 10 substantially uniformly from one main surface of the light guide plate 30. In this case, the positional relationship can be easily determined.

  Since the light source 10 of the light source component X1 is an LED, an increase in the temperature of the LED can be suppressed. Therefore, the light source component X1 is suitable for suppressing the shortening of the lifetime of the LED caused by continuing to drive the LED at a high temperature. Moreover, when the material which encloses the light emission body 11 of LED with which the light source component X1 is provided is a resin material, it can suppress that LED becomes short-life resulting from deterioration of a resin material. Therefore, the light source component X1 is more suitable for suppressing the shortening of the life of the LED due to continuing to drive the LED at a high temperature.

  Since the light source component X1 is configured such that the light source 10 contacts the light guide plate 30, it is suitable for increasing the ratio of light incident on the light guide plate 30 with respect to the light emission amount of the light source 10.

  Moreover, since the accommodating part 30a of the light guide plate 30 is provided so as to penetrate the thickness direction of the light guide plate 30, the heat radiation member 40 and the light source 10 disposed on the other main surface (lower surface) of the light guide plate 30 are provided. Can be placed closest to each other. Therefore, the light source component X1 is suitable for enhancing the heat dissipation from the portion of the light source 10 facing the heat dissipation member 40.

  In addition, since the fitting member 51 and the fixing member 52 are attached to the through hole 40a in a state where there is no protruding portion from the heat radiating member 40, it is suitable for reducing the size of the light source component X1.

  FIG. 3 is a perspective view illustrating a schematic configuration of a light source component X2 according to the second embodiment of the present invention. The light source component X2 is different from the light source component X1 in that a light guide plate 30 'is used instead of the light guide plate 30 of the light source component X1. Other configurations of the light source component X2 are the same as those described above regarding the light source component X1.

  The light guide plate 30 ′ is for guiding light incident from the light source 10 so as to be emitted from one main surface of the light guide plate 30 ′. In the present embodiment, the light guide plate 30 ′ has an accommodating portion 30 a ′ for collectively accommodating a plurality of light sources 10 on the side surface portion. Examples of the constituent material of the light guide plate 30 ′ include the same materials as those of the light guide plate 30 of the light source component X <b> 1. The light guide plate 30 ′ may be provided with a diffusion sheet 31, a prism sheet 32, and a reflection sheet 33, similar to the light guide plate 30 of the light source component X <b> 1.

  In the light source component X2 according to the present embodiment, the housing portion 30a ′ of the light guide plate 30 ′ is formed so as to collectively house a plurality of light sources 10, so that the position of the light source 10 can be arbitrarily set within the housing portion 30a ′. Can be set. Therefore, in the light source component X2, for example, the distance between the light sources 10 accommodated in the accommodating portion 30a ′ is reduced without changing the shape of the accommodating portion 30a ′ of the light guide plate 30 ′, and more light sources are used. It is possible to change the optical design such as accommodating in the accommodating portion 30a ′.

  FIG. 4 is a cross-sectional view illustrating a schematic configuration of a liquid crystal display device Y including the light source component X1 according to the present invention. The liquid crystal display device Y includes a light source member X1, a liquid crystal display panel 60, and a housing 70. In the present embodiment, the light source component X1 is used for explanation, but it may be replaced with the light source component X2.

  5A and 5B are diagrams showing a schematic configuration of the liquid crystal display panel 60, where FIG. 5A is a perspective view and FIG. 5B is a cross-sectional view.

  The liquid crystal display panel 60 includes a liquid crystal layer 61, a first base 62, a second base 63, and a sealing member 64. Further, in the liquid crystal display panel 60, the display region D is formed by interposing the liquid crystal layer 61 between the first base 62 and the second base 63 and sealing the liquid crystal layer 61 with the sealing member 64. Yes.

  The liquid crystal layer 61 is a layer that includes liquid crystal that exhibits electrical, optical, mechanical, or magnetic anisotropy and has both solid regularity and liquid fluidity. Examples of the liquid crystal include nematic liquid crystal, cholesteric liquid crystal, and smectic liquid crystal.

  The first base 62 contributes to sealing the liquid crystal layer 61 and includes a transparent substrate 621 and a transparent electrode (not shown). The transparent substrate 621 is for supporting the transparent electrode, and as a constituent material thereof, glass, translucent plastic, or the like can be given to appropriately transmit light in a direction intersecting the main surface. It is done. The transparent electrode of the first substrate 62 is a member for applying a predetermined voltage to the liquid crystal of the liquid crystal layer 61, and the constituent material thereof is a transparent material such as ITO, tin oxide, zinc oxide, titanium oxide or lead oxide. Examples thereof include a conductive member having optical properties. Here, the translucency means a property of transmitting light with a light amount equal to or greater than a reference value. The first base 62 selectively selects a predetermined wavelength among a light shielding film for blocking light (a light transmission amount is set to a predetermined value or less), a light reflecting film for reflecting light, and incident light. A color filter for absorbing and selectively transmitting only a predetermined wavelength, a flattening film for flattening unevenness caused by arranging a light reflection film or a color filter, and a macro random direction An alignment film or the like for aligning liquid crystal molecules of the liquid crystal layer 61 facing (small regularity) in a predetermined direction may be provided.

  The second base 63 contributes to sealing the liquid crystal layer 61 and includes a transparent substrate 631 and a transparent electrode (not shown). The transparent substrate 631 is for supporting the transparent electrode, and the constituent materials thereof are the same as the materials constituting the transparent substrate 621. The transparent electrode of the second base 63 is a member for applying a predetermined voltage to the liquid crystal of the liquid crystal layer 61, and the constituent materials thereof are the same as the materials constituting the transparent electrode of the first base 62. .

  The sealing member 64 contributes to sealing the liquid crystal layer 61 between the first base body 62 and the second base body 63, and the first base body 62 and the second base body 63 are separated from each other at a predetermined interval. It is for joining. Examples of the sealing member 64 include an epoxy resin adhesive and an acrylic resin adhesive.

  The housing 70 is a member for housing the liquid crystal display panel 60 and the light source component X1, and includes an upper housing 71 and a lower housing 72. Examples of the material constituting the housing 70 include resins such as polycarbonate resin, and metals such as stainless steel and aluminum, and metals are preferable from the viewpoint of heat dissipation.

  Since the liquid crystal display device Y according to the present invention includes the light source component X1 according to the present invention, the above-described effects of the light source component X1 according to the present invention can be enjoyed. In other words, in the liquid crystal display device Y, by increasing the heat dissipation of the light source 10, at least one of the light source characteristics that decrease when the light source 10 becomes high temperature can be driven in a sufficiently high state. Further, in the liquid crystal display device Y, the drive time exceeding the lifetime of the light source 10 alone can be secured by replacing the light source 10 in a timely manner.

  Furthermore, since the liquid crystal display device Y includes the light source component X1, heat generated by the light source 10 can be efficiently conducted to the outside of the liquid crystal display device Y. Therefore, in the liquid crystal display device Y, heat generated by the light source 10 can be suppressed from being transmitted to the liquid crystal layer 61. Therefore, the liquid crystal display device Y is suitable for suppressing a partial deterioration of the optical characteristics of the liquid crystal layer 61 caused by heat conduction to a portion of the liquid crystal layer 61 close to the light source 10. As a result, the liquid crystal display device Y is suitable for suppressing the deterioration of the display characteristics of the liquid crystal display panel 60 resulting from the deterioration of the optical characteristics of the liquid crystal layer.

  Although specific embodiments of the present invention have been described above, the present invention is not limited to these embodiments, and various modifications can be made without departing from the spirit of the invention.

  The light source components X1 and X2 are configured such that the light source 10 contacts the light guide plates 30 and 30 ′ in order to increase the ratio of light incident on the light guide plates 30 and 30 ′ with respect to the light emission amount of the light source 10. However, the configuration is not limited to this, and the light guide plates 30 and 30 ′ and the light source 10 may be separated from each other.

  The mounting member 20 of the light source components X1 and X2 may be provided with metal wirings on both main surfaces of the mounting member 20, and the metal wirings may be connected by metal through holes. With such a configuration, the thermal conductivity between the two main surfaces of the mounting member 20 can be improved, which is preferable for further suppressing the temperature rise.

  The light guide plates 30 and 30 ′ of the light source components X1 and X2 are configured in a flat plate shape having a substantially uniform thickness. However, the configuration is not limited to such a configuration. It is good also as a structure which thickness becomes thin continuously toward the opposite side.

  The accommodating portions 30a and 30a ′ provided on the side surfaces of the light guide plates 30 and 30 ′ of the light source components X1 and X2 are provided so as to penetrate the thickness direction of the light guide plates 30 and 30 ′. It is not restricted to a structure, The recessed part which has an opening part only in a side surface may be sufficient.

  The light guide plate 30 ′ of the light source component X 2 is provided with one accommodating portion 30 a ′ that collectively accommodates the plurality of light sources 10, but is not limited to such a configuration, and accommodates a plurality of light sources 10 collectively. A plurality of parts may be provided.

  The fitting member 51 of the light source components X1 and X2 is structured to be fixed to the heat radiating member 40 by the fixing member 52, but the fitting surface 51b of the fitting member 51 is fitted into the through hole 40a of the heat radiating member 40. As long as it is made, it is not restricted to such a structure, For example, it is good also as a structure which fixes the fitting member 51 to the housing | casing 70. FIG.

  The fitting member 51 of the light source components X1 and X2 is configured to be fixed to the heat radiating member 40 by the fixing member 52, but is not limited to such a configuration, and is not limited to the through hole 40a of the heat radiating member 40. On the other hand, the configuration may be such that the fitting surface 51b of the fitting member 51 is simply fitted.

  In the liquid crystal display device Y, the heat radiating member 40 and the housing 70 are configured as separate bodies. However, the configuration is not limited to such a configuration, and the housing 70 and the heat radiating member 40 may be configured integrally. .

  The liquid crystal display device Y includes a retardation film for converting linearly polarized light that is converted into an elliptically polarized state due to birefringence (phase shift) of the liquid crystal into a state close to linearly polarized light, A polarizing plate or the like for selectively transmitting light in the vibration direction may be provided.

  In the present embodiment, the liquid crystal display device Y including the liquid crystal display panel 60 has been described as an example. However, the present invention also applies to a display device that employs another display panel that does not emit light instead of the liquid crystal display panel 60. The effect which the light source component has can be enjoyed similarly to the liquid crystal display device Y. Examples of the display panel that does not emit light include a display panel that uses reflected light such as electronic paper, a light source disposed on the front side, and a light-transmitting signboard.

It is sectional drawing which shows schematic structure of the light source component X1 which concerns on this invention, (a) is the whole figure, (b) is the principal part enlarged view. It is the principal part expansion schematic which shows the attachment structure of the attachment means 50 of the light source component X1 which concerns on this invention, (a) is the perspective view, (b) is the decomposition | disassembly sectional drawing. It is a perspective view which shows the schematic structure of the attachment structure of the attachment means 50 of the light source component X2 which concerns on this invention, and light-guide plate 30 '. It is sectional drawing showing schematic structure of the liquid crystal display device Y provided with the light source component X1 which concerns on this invention. It is a figure showing schematic structure of the liquid crystal display panel 50 in the liquid crystal display device Y shown in FIG. 4, (a) is the perspective view, (b) is sectional drawing.

Explanation of symbols

X1, X2 Light source component Y Liquid crystal display device 10 Light source 11 Light emitter 12 Connection terminal 20 Mounting member 21 Mounting member main body 22, 23 Connection terminal 30, 30 'Light guide plate 31 Diffusion sheet 32 Prism sheet 33 Reflection sheet 40 Heat radiation member 50 Attachment means 51 Fitting member 52 Fixing member 53 Joining member 60 Liquid crystal display panel 61 Liquid crystal layer 62 First base 63 Second base 64 Sealing member 70 Housing 71 Upper housing 72 Lower housing

Claims (8)

One or more light sources;
A light guide plate that guides light incident from the light source so as to be emitted from one main surface;
A heat radiating member having a through hole facing the light guide plate, and radiating heat generated by the light source to the outside;
A light source component comprising: attachment means for fitting at least a part of the through hole of the heat radiating member and detachably attaching the light source to the heat radiating member. 2. The light source component according to claim 1, wherein the light guide plate communicates with the through hole of the heat radiating member and has a housing portion for housing the light source. The light source component according to claim 2, wherein the housing portion is formed to individually house the plurality of light sources. The light source component according to claim 2, wherein the housing part is formed so as to collectively house at least two light sources among the plurality of light sources. The light source component according to claim 1, further comprising a mounting member for mounting the plurality of light sources. The light source component according to claim 5, wherein the placement member is in contact with the light guide plate. The light source component according to claim 1, wherein the light source is a light emitting diode. A display device comprising: the light source component according to claim 1; and a display panel disposed to face one main surface of the light guide plate of the light source component.

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