JP7117651B2 - Light source unit and display device provided with the same - Google Patents

Description

The present disclosure relates to a light source unit and a display device having the same.

2. Description of the Related Art Conventionally, a light source device that can be used as a light source for an emergency lighting is known (see, for example, Patent Document 1).

The light source device described in Patent Document 1 includes a light emitting diode, a linear light guide that guides the light emitted from the light emitting diode and linearly emits light, and a linear light emitted from the linear light guide. a planar light guide plate that guides light and emits planar light.

Japanese Patent Application Laid-Open No. 2004-349030

By the way, when the light source device described in Patent Document 1 is used as a light source for an emergency lighting, the power of a magnitude corresponding to the luminous efficiency of the light emitting diode is supplied to the light source so that the luminance of the emergency lighting falls within a predetermined range. It is necessary to feed the device. Therefore, the light source device described in Patent Document 1 must be combined with a power supply device that supplies a predetermined amount of power, and there is room for improvement in terms of versatility.

In view of the above circumstances, an object of the present disclosure is to provide a light source unit that can easily ensure a predetermined luminance and a display device including the same.

A light source unit according to one aspect of the present disclosure includes a light-emitting diode, a substrate on which the light-emitting diode is mounted, a rod-shaped light guide member, a case that accommodates the light guide member, a case that is attached to the case, and a and a holding member that sandwiches and holds the substrate between. The light guide member has an incident surface on which light emitted from the light emitting diode is incident, and an output surface from which the light incident on the incident surface is emitted. The substrate includes a portion covered by the case and the holding member. Electronic components are mounted on the portion to adjust the power supplied to the light emitting diodes.

A display device according to one aspect of the present disclosure includes the light source unit, a light guide plate, and a display panel. The light guide plate has an incident surface on which light emitted from the light source unit is incident, and an output surface from which the light incident on the incident surface is emitted. The display panel is translucent and positioned to face the exit surface of the light guide plate.

INDUSTRIAL APPLICABILITY The present disclosure can provide a light source unit that easily ensures a predetermined luminance and a display device including the same.

FIG. 1A is an exploded perspective view showing a light source unit of one embodiment according to the present disclosure, FIG. 1B is an enlarged view of W portion of FIG. 1A, and FIG. 1C is an enlarged view of X portion of FIG. 1A. be. FIG. 2A is a perspective view showing the same light source unit, and FIG. 2B is a front sectional view showing the same light source unit. FIG. 3 is an enlarged view of the Y portion of FIG. 2B. FIG. 4 is an exploded perspective view showing an example of a display device including the same light source unit. 5A is a perspective view showing an example of the same display device, and FIG. 5B is a cross-sectional view taken along line ZZ in FIG. 5A. FIG. 6A is an exploded perspective view showing a main part of a modification of the light source unit, and FIG. 6B is a front cross-sectional view showing a main part of the modification of the light source unit.

(light source unit)
(1) Overview As shown in FIGS. 1A to 1C and FIGS. 2A and 2B, a light source unit 1 of one embodiment includes a light emitting diode 2, a substrate 3 on which the light emitting diode 2 is mounted, and a rod-shaped light guide member 4. , a case 5 for accommodating the light guide member 4 and a holding member 6 .

The light guide member 4 has an incident surface 40 on which light emitted from the light emitting diode 2 is incident, and an output surface 41 from which the light incident on the incident surface 40 is emitted. The holding member 6 is attached to the case 5 and holds the substrate 3 by sandwiching it between itself and the case 5 . Substrate 3 includes a portion 30 covered by case 5 and holding member 6 . The portion 30 is mounted with an electronic component 7 for regulating the power supplied to the light emitting diode 2 .

In the light source unit 1 of one embodiment, the power supplied to the light emitting diodes 2 can be adjusted by the electronic component 7 while the substrate 3 is electrically connected to an external power supply. Therefore, in the light source unit 1 of the embodiment, it is possible to supply the light emitting diode 2 with power corresponding to the luminous efficiency of the light emitting diode 2, and the brightness of the light emitted from the light emitting surface 41 can be adjusted to the desired brightness. can do. As a result, when the light source unit 1 of the embodiment is used as a light source for a guide light as shown in FIG.

(2) Details The light source unit 1 will be described in more detail below. In the following description, each configuration will be described using the directions shown in FIG. 1A.

(2-1) Substrate As shown in FIGS. 1A and 2A and 2B, the light source unit 1 includes a pair of left and right substrates 3 . The substrate 3 has a portion 30 covered by the case 5 and the holding member 6 and a second portion 31 not covered by the case 5 and the holding member 6 . The second portion 31 is located on the rear side of the portion 30 and is shorter than the portion 30 in the vertical direction.

As shown in FIG. 3 , the portion 30 includes a first surface 300 covered by the case 5 and a second surface 301 facing away from the first surface 300 and covered by the retaining member 6 . The first surface 300 includes an outer peripheral portion 300a in contact with the longitudinal end surface (left end surface or right end surface) of the case 5, and an inner portion 300b positioned inside thereof. The light emitting diode 2 and the electronic component 7 are mounted on the inner portion 300b.

As shown in FIG. 1B , a plurality of terminals 8 (two or more poles) for power supply are mounted on the rear end portion of a surface 310 of the second portion 31 facing the same direction as the first surface 300 .

Each of the light emitting diode 2, the electronic component 7, and the terminal 8 for power supply is mounted on one surface of the substrate 3 by reflow soldering, for example.

In this embodiment, the substrate 3 is a glass-based substrate such as a glass epoxy substrate, but may be a paper-based substrate such as a paper phenol substrate.

(2-2) Light Guide Member As shown in FIGS. 1A and 2B, the light guide member 4 has incident surfaces 40 at both end surfaces in the longitudinal direction and an output surface 41 at the bottom surface.

In this embodiment, the light guide member 4 is composed of a pair of left and right first light guides 42 and a second light guide 43 located below them. Each of the light guides 42 and 43 is made of transparent acrylic resin. The light guides 42 and 43 have the same length in the front-rear direction.

The pair of left and right first light guides 42 are symmetrical to each other. The first light guide 42 on the left side is in the shape of a bar elongated in the left-right direction. The left end surface 420 of the first light guide 42 on the left side is the incident surface 40 . The first light guide 42 on the left side has an upper surface 421 that is inclined downward toward the right side, and a lower surface 422 that is flat. None.

The first light guide member 42 on the right side is in the shape of a bar elongated in the left-right direction. The right end surface 423 of the first light guide 42 on the right side is the incident surface 40 . The first light guide 42 on the right side has an upper surface 421 that is inclined downward toward the left side, and a lower surface 422 that is flat. None.

Projections 424 used for positioning with respect to the case 5 are provided at the left end of the upper surface 421 of the left first light guide 42 and the right end of the upper surface 421 of the right first light guide 42 .

The second light guide 43 has a rod shape elongated in the left-right direction, and has a substantially constant length in the up-down direction over the left-right direction. The second light guide 43 has a lateral length approximately twice that of the first light guide 42 .

The second light guide 43 has an upper surface 430 and a lower surface 431 parallel to each other. The lower surface 431 is the exit surface 41 . The second light guide 43 has mounting projections 432 projecting outward in the left-right direction on the left and right end faces.

A pair of the first light guide 42 and the second light guide 43 is such that the lower surface 422 of the left first light guide 42 is in contact with the left half of the upper surface 430 of the second light guide 43 and The right half of the upper surface 430 of the light body 43 is superimposed so that the lower surface 422 of the right first light guide 42 is in contact with the right half.

In the light guide member 4 , the light incident on the incident surfaces 40 of the left and right first light guides 42 is guided through the left and right first light guides 42 and the second light guides 43 to reach the second light guides. The light is emitted from the entire emission surface 41 of the light body 43 .

(2-3) Case The case 5 has a box shape elongated in the left-right direction, and has openings 58 and 59 on the left and right end faces and the bottom face, respectively. The case 5 is made of synthetic resin and has no translucency.

The case 5 includes an upper wall 50 , a front wall 51 integral with the front end of the upper wall 50 , a rear wall 52 integral with the rear end of the upper wall 50 , and a pair of rectangular frames integral with the left and right ends of the upper wall 50 . and four holding pieces 54 projecting outward in the left-right direction from each of the pair of side walls 53 .

The upper wall 50 includes a first wall portion 500 that is curved downward toward the right side, and a second wall that is continuous with the right end of the first wall portion 500 and curved upward toward the right side. and a part 501 . The bottom surface of the left end of the first wall portion 500 and the bottom surface of the right end of the second wall portion 501 are respectively provided with recesses 502 (see FIG. 3) used for positioning the light guide member 4 .

The front wall 51 and the rear wall 52 are parallel to each other and are separated in the front-rear direction by the same distance as the length of the light guide member 4 in the front-rear direction.

The holding pieces 54 protrude outward in the left-right direction from four corners of each side wall 53 (see FIG. 1C). The four corners of the portion 30 of the substrate 3 are held by the four holding pieces 54, thereby restricting displacement in the vertical direction and the front-rear direction.

As shown in FIG. 3, each of the pair of side walls 53 includes an upper inclined wall 55 protruding downward and inward in the left-right direction from the lower end of the upper frame portion 530, and an upper end of the lower frame portion 531 extending in the left-right direction. It further has a downwardly inclined wall 56 projecting upwards on the inner side. An extension wall 57 protrudes inward in the left-right direction from an inner end portion in the left-right direction of the lower inclined wall 56 .

An upper frame portion 530 of each of the pair of side walls 53 is continuous with the upper wall 50 via an upper inclined wall 55 . As shown in FIG. 1C , each of the pair of side walls 53 has a front frame portion 532 continuous with the front wall 51 and a rear frame portion 533 continuous with the rear wall 52 .

Each of the pair of side walls 53 has an opening 58 penetrating in the left-right direction. The opening 58 is a portion surrounded by the upper inclined wall 55 , the lower inclined wall 56 and the left and right frame portions 532 and 533 .

The case 5 has an opening 59 surrounded by the lower end of the front wall 51, the lower end of the rear wall 52, and the lower ends of the pair of side walls 53 (lower frame portion 531).

The case 5 accommodates the light guide member 4 as shown in FIG. 2B. By inserting the protrusions 424 into the pair of left and right recesses 502 of the upper wall 50 , the left and right first light guides 42 are prevented from being displaced in the left and right direction. The second light guide 43 is positioned in the case 5 and closes the opening 59 of the case 5 by holding the projection 432 by the holding member 6 attached to the case 5 .

When the light guide member 4 is accommodated in the case 5, the left and right entrance surfaces 40 of the light guide member 4 are positioned to face the left and right openings 58, and the light exit surface 41 of the light guide member 4 is exposed downward. do.

(2-4) Holding Member The holding member 6 is a member that is attached to the case 5 and that sandwiches and holds the substrate 3 with the case 5 . In this embodiment, the light source unit 1 includes a pair of left and right holding members 6 .

As shown in FIG. 1B, the holding member 6 includes a flat plate portion 60, a pair of mounting pieces 61 protruding inward in the left-right direction from the upper and lower ends of the flat plate portion 60, and a pair of holding pieces 62 protruding inward.

Each of the pair of mounting pieces 61 is provided with a claw portion 610 for hooking on the upper and lower frame portions 530 and 531 of the side wall 53 of the case 5 at the tip portion (horizontal direction inner end portion).

Each of the pair of holding pieces 62 protrudes inward in the left-right direction from the central portion of the flat plate portion 60 in the front-rear direction, and is continuous with the corresponding mounting piece 61 of the pair of mounting pieces 61 . The tip surfaces (surfaces on the inner side in the left-right direction) of the pair of holding pieces 62 are flat and serve as holding surfaces for holding the substrate 3 .

The holding member 6 is attached to the case 5 by hooking the claw portions 610 of the pair of attachment pieces 61 to the upper and lower frame portions 530 and 531 of the side wall 53 of the case 5, as shown in FIG. The holding member 6 holds the substrate 3 between itself and the case 5 by having the pair of holding pieces 62 in contact with the second surface 301 of the portion 30 of the substrate 3 held by the case 5 .

With the pair of holding members 6 attached to the case 5, the left and right protrusions 432 of the second light guide 43 of the light guide member 4 are pushed downward by the claws 610 of the lower mounting pieces 61 of the pair of holding members 6. supported by Thereby, the light guide member 4 is positioned within the case 5 .

(2-5) Electronic Component The electronic component 7 is a component that adjusts power supplied to the light emitting diode 2 . As the electronic component 7, one corresponding to the luminous efficiency of the light emitting diode 2 is used. The electronic component 7 is a chip resistor, Zener diode, or the like.

In this embodiment, the electronic component 7 is mounted on the inner portion 300 b of the first surface 300 of the portion 30 of the substrate 3 . The electronic component 7 is arranged adjacent to the light emitting diode 2 and does not contact the upper inclined wall 55 or the lower inclined wall 56 of the case 5 .

The height of the electronic component 7 from the first surface 300 is lower than the height from the first surface 300 of the light emitting diode 2 . This prevents the electronic component 7 from being positioned within the light emission range of the light emitting diode 2 .

(3) Method for Assembling Light Source Unit Next, an example of a method for manufacturing the light source unit 1 by combining the configurations described above will be described.

First, a pair of left and right first light guides 42 and second light guides 43 are inserted into the case 5 through the opening 59 on the lower side of the case 5 . By inserting the protrusions 424 into the recesses 502 of the case 5 , each of the pair of left and right first light guides 42 is restricted from being shifted in the left-right direction.

Next, the outer peripheral portion 300 a of the portion 30 of the substrate 3 is applied to each of the left and right side walls 53 of the case 5 , and the substrate 3 is supported by the four holding pieces 54 of the case 5 .

Next, the holding member 6 is attached to each of the left and right side walls 53 of the case 5 . By attaching the holding member 6 to the case 5 , the portion 30 of the substrate 3 is sandwiched and held between the holding piece 62 of the holding member 6 and the side wall 53 of the case 5 . At this time, the left and right protrusions 432 of the second light guide body 43 of the light guide member 4 are supported from below by the claw portions 610 of the lower mounting pieces 61 of the left and right holding members 6, thereby guiding the light. A member 4 is positioned within the case 5 .

With the portion 30 of the substrate 3 sandwiched and held between the case 5 and the holding member 6 , the light emitting diode 2 and the electronic component 7 are accommodated within the opening 58 of the side wall 53 . As a result, the light emitting diode 2 and the electronic component 7 are covered and protected by the case 5 .

While the portion 30 of the substrate 3 is sandwiched and held between the case 5 and the holding member 6, the second portion 31 of the substrate 3 is positioned outside (rear side) of the case 5 and exposed. This facilitates mechanical and electrical connection of the power terminal 8 mounted on the second portion 31 to an external power supply device.

(4) Functions and Effects of Light Source Unit The light source unit 1 described above receives power supplied to the light emitting diode 2 when the power supply terminal 8 of the board 3 is electrically connected to an external power supply device. 7 can be adjusted.

Therefore, in the light source unit 1, it is possible to supply the light emitting diode 2 with electric power corresponding to the luminous efficiency of the light emitting diode 2, and the brightness of the light emitted from the light emitting surface 41 of the light guide member 4 can be adjusted to a desired level. It can be luminance.

In addition, in the light source unit 1, the electronic components 7 are accommodated in the opening 58 at the side edge of the case 5 together with the light emitting diode 2, so that it is possible to prevent the electronic components 7 from being damaged due to an external load.

In addition, in the light source unit 1, the height of the electronic component 7 from the first surface 300 is lower than the height of the light emitting diode 2 from the first surface 300, so the electronic component 7 is within the light emission range of the light emitting diode 2. The electronic component 7 is less likely to interfere with the incidence of light on the incident surface 40 .

In addition, in the light source unit 1 , the power supply terminal 8 is mounted on the second portion 31 of the substrate 3 and positioned away from the electronic component 7 . Therefore, in the light source unit 1, when the power terminal 8 is electrically and mechanically connected to an external power supply device (socket 18, etc.), stress is applied to the electronic component 7, which may cause problems. can be prevented.

Further, in the light source unit 1, since there is a gap between the portion 30 of the substrate 3 and the flat plate portion 60 of the holding member 6, heat is easily dissipated from the portion 30 of the substrate 3 through this gap, and the light emitting diode 2 and the electronic component 7 It is easy to ensure the reliability of

(Display device)
Next, an example of a display device 100 including the light source unit 1 described above will be described.

As shown in FIGS. 4 and 5A and 5B, the display device 100 includes a light source unit 1, a light guide plate 9, and a display panel 10. FIG. In this embodiment, the display device 100 further includes an outer case 11 that houses the light source unit 1, a panel case 12 that supports the light guide plate 9 and the display panel 10, and various electric devices for causing the light source unit 1 to emit light. and a housing 13 to be accommodated. Various electric devices are, for example, a terminal block 14, a power supply device 15, and a control device 16. FIG. The display device 100 is used, for example, as an evacuation guide light.

The light guide plate 9 has a rectangular plate shape and has a thickness in the front-rear direction. The light guide plate 9 has an upper surface that is an incident surface 90 on which light from the light source unit 1 is incident, and a front surface that is an output surface 91 from which the light that has entered the light guide plate 9 is emitted. The light guide plate 9 is a resin-molded product, and is made of, for example, acrylic resin.

The rear surface of the light guide plate 9 is provided with a diffusion function for reflecting and diffusing light so that the light is emitted substantially uniformly from the entire front surface. The diffusion function may be imparted by forming an uneven diffusion pattern on the rear surface itself, or may be imparted by laminating another member (panel case 12, etc.) having a diffusion function on the rear surface.

The display panel 10 is a resin-molded product, and is made of, for example, acrylic resin. A display pattern 17 composed of pictograms representing a person is attached to the front surface of the display panel 10 . The display pattern 17 is formed on the front surface of the display panel 10 by suitable means such as printing.

The panel case 12 is a case that supports the light guide plate 9 and the display panel 10 that are in an overlapping state. The panel case 12 is, for example, a resin molded product. The panel case 12 does not have translucency. The panel case 12 is in the shape of a rectangular box having a thickness in the front-rear direction and having an open upper surface and a front surface. A mounting portion 120 used for mounting to the housing 13 is provided on the rear surface of the panel case 12 .

The outer case 11 is in the shape of a rectangular box elongated in the left-right direction and having an open rear surface and a lower surface. The outer case 11 is, for example, a molded resin product. The outer case 11 does not have translucency. A mounting portion 110 used for mounting to the housing 13 is provided on the rear surface of the outer case 11 . The light source unit 1 is detachably accommodated in the outer case 11 .

The housing 13 has a rectangular box shape with an open front surface. The housing 13 is provided with an attached portion 130 to which the attaching portion 120 of the panel case 12 is attached, and an attached portion 131 to which the attaching portion 110 of the outer case 11 is attached. By attaching the panel case 12 and the outer case 11 to the housing 13, the entire front opening of the housing 13 is closed.

The terminal block 14 is a device to which electrical wiring connected to an external power source is connected. The power supply device 15 is a device that supplies power to the light emitting diodes 2 of the light source unit 1 . Power supply device 15 includes a storage battery. The power supply device 15 is electrically connected to the terminal block 14 . The power supply device 15 is electrically connected to the socket 18 via electrical wiring. A pair of left and right sockets 18 are provided in the housing 13 . By attaching the outer case 11 housing the light source unit 1 to the housing 13 , the second portion 31 of the substrate 3 of the light source unit 1 is inserted into the socket 18 . As a result, the power terminal 8 of the substrate 3 and the socket 18 are electrically connected, and a predetermined amount of power is supplied to the light emitting diode 2 .

The control device 16 is a device for controlling lighting and extinguishing of the light emitting diodes 2 of the light source unit 1 . The control device 16 has a circuit board and circuit components mounted thereon to form a control circuit. A control device 16 is electrically connected to the light emitting diodes 2 on the substrate 3 .

In the display device 100 described above, the light emitted from the emission surface 41 of the light source unit 1 is incident on the incidence surface 90 of the light guide plate 9, reflected by the rear surface of the light guide plate 9, and emitted from the light guide plate 9. The light emitted from the surface 91 (front surface) can cause the display panel 10 to emit light.

In the display device 100, a predetermined amount of electric power supplied from the power supply device 15 can be adjusted by the electronic component 7, the light source unit 1 can be caused to emit light with desired luminance, and the display panel 10 can be operated at the desired level. can be emitted with a brightness of Accordingly, in the display device 100, it is easy to ensure a predetermined luminance required for the guide light.

Further, in the display device 100, when the light source unit 1 is replaced due to the life of the light emitting diode 2, a new light source unit 1 including the light emitting diode 2 with improved luminous efficiency can be adopted. In this case, the electronic component 7 is used to adjust the power supplied to the light emitting diode 2 so that the light emitting diode 2 emits light with the same brightness as the light source unit 1 used before.

(Modification)
Modified examples of the light source unit 1 and the display device 100 of the present embodiment described above will be described.

The light source unit 1 may further include a heat sink 19 in contact with the second surface 301 of the portion 30 of the substrate 3 and held by the holding member 6, as shown in FIGS. 6A and 6B. The heat sink 19 is, for example, an aluminum plate.

The heat sink 19 has substantially the same outer shape as the portion 30 of the substrate 3 . The radiator plate 19 has a pair of cutouts 190 in which the pair of holding pieces 62 of the holding member 6 are accommodated. The radiator plate 19 is supported at its four corners by the four holding pieces 54 of the case 5 and held between the substrate 3 and the flat plate portion 60 of the holding member 6 .

In this modified example, by providing the heat sink 19 in contact with the substrate 3 , it is easy to dissipate heat from the substrate 3 and to ensure the reliability of the light emitting diodes 2 and the electronic components 7 .

Also, the height of the electronic component 7 from the first surface 300 may be the same as or higher than the height of the light emitting diode 2 from the first surface 300 . In this case, the electronic component 7 is preferably mounted at a position away from the light emitting diode 2 so as to be positioned outside the light emission range of the light emitting diode 2 .

Further, the electronic component 7 may be mounted on the second surface 301 of the light source unit 1 . In this case also, the electronic component 7 allows the power supplied to the light emitting diode 2 to be regulated.

Further, the light source unit 1 is not limited to the light source of the guide light, and may be used as the light source of the light (emergency light) for evacuation guidance, or as the light source of the light for displaying various signs and advertisements. good too.

Further, the light source unit 1 may have a structure constituted only by the right half or the left half of the light source unit 1 shown in FIG. 2A.

Further, the substrate 3 includes not only the electronic component 7 for adjusting the power supplied to the light emitting diode 2, but also other electronic components such as protective elements for protecting the light emitting diode 2 and the electronic component 7 from overcurrent and rush current. may also be implemented.

(summary)
Like the light source unit 1 of the embodiment and its modified example described above, the light source unit 1 of the first mode has the following configuration.

That is, the light source unit 1 of the first mode includes a light emitting diode 2, a substrate 3 on which the light emitting diode 2 is mounted, a rod-shaped light guide member 4, a case 5 that accommodates the light guide member 4, and a light source unit 1 attached to the case 5. and a holding member 6 that sandwiches and holds the substrate 3 between itself and the case 5 . The light guide member 4 has an incident surface 40 on which light emitted from the light emitting diode 2 is incident, and an output surface 41 from which the light incident on the incident surface 40 is emitted. Substrate 3 includes a portion 30 covered by case 5 and holding member 6 . The portion 30 is mounted with an electronic component 7 for regulating the power supplied to the light emitting diode 2 .

By providing the above configuration, in the light source unit 1 of the first aspect, when the substrate 3 is electrically connected to an external electric device and power is supplied to the light emitting diode 2, the light emitting diode 2 is supplied with power. Power can be regulated by electronics 7 . Therefore, in the light source unit 1 of the first mode, the electric power supplied to the light emitting diode 2 can be adjusted according to the luminous efficiency of the light emitting diode 2, so that the light emitting diode 2 can emit light with desired luminance. As a result, the light source unit 1 of the first aspect can be effectively used as a light source for electrical equipment that requires a predetermined brightness, such as an induction light.

Moreover, like the light source unit 1 of one embodiment and its modification, the light source unit 1 of the second aspect additionally includes the following configuration in addition to the configuration of the light source unit 1 of the first aspect.

That is, in the light source unit 1 of the second aspect, the substrate 3 further includes the second portion 31 that is not covered by the case 5 and the holding member 6. As shown in FIG. A power supply terminal 8 electrically connected to the electronic component 7 and the light emitting diode 2 is mounted on the second portion 31 .

With the above configuration, in the light source unit 1 of the second aspect, the electronic component 7 can be provided in a portion distant from the power supply terminal 8 . Therefore, in the light source unit 1 of the second aspect, stress is applied to the electronic component 7 when electrically and mechanically connecting the power supply terminal 8 to an external power supply device, preventing problems from occurring. be able to.

Further, like the light source unit 1 of one embodiment and its modification, the light source unit 1 of the third aspect additionally includes the following configuration in addition to the configuration of the light source unit 1 of the first or second aspect. .

That is, in the light source unit 1 of the third aspect, the portion 30 includes a first surface 300 covered by the case 5 and a second surface 301 facing the opposite side of the first surface 300 and covered by the holding member 6. . A light emitting diode 2 and an electronic component 7 are mounted on the first surface 300 .

By providing the above configuration, in the light source unit 1 of the third aspect, when the electronic component 7 is mounted on the surface (second surface 301) opposite to the surface (first surface 300) on which the light emitting diode 2 is mounted Easier to manufacture than

Moreover, like the light source unit 1 of one embodiment and its modification, the light source unit 1 of the fourth aspect additionally includes the following configuration in addition to the configuration of the light source unit 1 of the third aspect.

That is, in the light source unit 1 of the fourth aspect, the height of the light emitting diode 2 from the first surface 300 is higher than the height of the electronic component 7 from the first surface 300 .

With the above configuration, in the light source unit 1 of the fourth aspect, the electronic component 7 is positioned in the light emission range of the light emitting diode 2, preventing the light from entering the incident surface 40 of the light guide member 4. can be prevented from becoming

Moreover, like the light source unit 1 of the modified example of one embodiment, the light source unit 1 of the fifth aspect additionally includes the following configuration in addition to the configuration of the light source unit 1 of the third or fourth aspect.

That is, the light source unit 1 of the fifth aspect further includes the radiator plate 19 that is in contact with the second surface 301 and held by the holding member 6 .

With the above configuration, in the light source unit 1 of the fifth aspect, the heat of the substrate 3 can be radiated through the heat sink 19, and the reliability of the light emitting diodes 2 and the electronic components 7 can be easily ensured.

Further, like the display device 100 of one embodiment and its modification, the display device 100 of the sixth aspect includes the light source unit 1 of any one of the first to fifth aspects, the light guide plate 9, and the display panel 10. , provided. The light guide plate 9 has an incident surface 90 on which light emitted from the light source unit 1 is incident, and an output surface 91 from which the light incident on the incident surface 90 is emitted. The display panel 10 is translucent and positioned to face the exit surface 91 of the light guide plate 9 .

With the above configuration, in the display device 100 of the sixth aspect, the brightness of the light source unit 1 is likely to be stable, and the brightness of the surface of the display panel 10 is likely to be a predetermined brightness.

As described above, the present disclosure has been described based on the embodiments shown in the accompanying drawings, but the present disclosure is not limited to the above embodiments, and appropriate design changes are possible within the scope intended by the present disclosure. is.

1 light source unit 2 light emitting diode 3 substrate 30 portion 31 second portion 300 first surface 301 second surface 4 light guide member 40 entrance surface 41 exit surface 5 case 6 holding member 7 electronic component 8 terminal for power supply 9 light guide plate 90 incidence Surface 91 Output surface 10 Display panel 19 Radiator plate 100 Display device

Claims (6)

a light emitting diode;
a substrate on which the light emitting diode is mounted;
a rod-shaped light guide member having an incident surface on which light emitted from the light emitting diode is incident and an output surface from which the light incident on the incident surface is emitted;
a case that accommodates the light guide member;
a holding member that is attached to the case and sandwiches and holds the substrate between the case and the case;
the substrate includes a portion covered by the case and the holding member;
The portion is mounted with an electronic component that adjusts the power supplied to the light emitting diode ,
the substrate further includes a second portion not covered by the case and the holding member;
A power supply terminal electrically connected to the electronic component and the light emitting diode is mounted on the second portion,
light source unit. the portion includes a first surface covered by the case and a second surface facing away from the first surface and covered by the holding member;
The light emitting diode and the electronic component are mounted on the first surface,
The light source unit of Claim 1. The height of the light emitting diode from the first surface is higher than the height of the electronic component from the first surface,
3. The light source unit of claim 2. Further comprising a radiator plate in contact with the second surface and held by the holding member,
4. A light source unit according to claim 2 or 3. a light source unit;
a light guide plate having an incident surface on which light emitted from the light source unit is incident and an output surface from which the light incident on the incident surface is emitted;
a display panel having translucency and positioned facing the emission surface of the light guide plate;
The light source unit
a light emitting diode;
a substrate on which the light emitting diode is mounted;
a rod-shaped light guide member having an incident surface on which light emitted from the light emitting diode is incident and an output surface from which the light incident on the incident surface is emitted;
a case that accommodates the light guide member;
a holding member that is attached to the case and sandwiches and holds the substrate between the case and the case;
the substrate includes a portion covered by the case and the holding member;
The portion is mounted with an electronic component that adjusts the power supplied to the light emitting diode.
display device. A light source unit according to any one of claims 1 to 4 ;
a light guide plate having an incident surface on which light emitted from the light source unit is incident and an output surface from which the light incident on the incident surface is emitted;
a display panel having translucency and positioned facing the exit surface of the light guide plate;
display device.

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