WO2012063728A1

WO2012063728A1 - Lighting device and display device

Info

Publication number: WO2012063728A1
Application number: PCT/JP2011/075401
Authority: WO
Inventors: 良武石元
Original assignee: シャープ株式会社
Priority date: 2010-11-10
Filing date: 2011-11-04
Publication date: 2012-05-18

Abstract

A backlight unit (20), which is a lighting device, is provided with LEDs (32), which are a light source for radiating light, reflecting sheets (34) that reflect the light radiated from the LEDs (32), and a diffusion plate (22) that diffuses received light that has been reflected by the reflection sheets (34). The LEDs (32) are disposed such that the orientation of light radiation is in a direction away from the light receiving surface (22a) of the diffusion plate (22). The reflection sheets (34) are disposed in orientations that reflect the light radiated from the LEDs (32) toward the light receiving surface (22a) of the diffusion plate (22).

Description

Lighting device and display device

The present invention relates to an illumination device that irradiates light toward an object to be irradiated such as a liquid crystal display panel. Moreover, it is related with the display apparatus provided with this illuminating device.

Since a liquid crystal display device that is a typical display device generally does not emit light, the liquid crystal display panel itself that displays an image needs an illumination device on the opposite side of the display surface of the liquid crystal display panel, that is, on the back side. When this illumination device irradiates light toward a liquid crystal display panel that is an object to be irradiated, the liquid crystal display device can project an image on the screen. The illumination device arranged on the back side of the display surface of the liquid crystal display panel is called a backlight unit, for example.

As a light source used for the backlight unit, for example, a cold cathode fluorescent lamp and an LED (light emitting diode) are widely known. Further, a direct type is widely known as an illumination method for the backlight unit.

The direct type backlight unit has a light source arranged immediately below the liquid crystal display panel, that is, in a region facing the back surface of the liquid crystal display panel. In order to effectively irradiate the liquid crystal display panel with light from the light source, some direct type backlight units include a diffusing plate that diffuses light emitted from the light source. Patent Document 1 discloses a liquid crystal display device including a conventional illumination device which is an example of such a direct type backlight unit.

In the liquid crystal display device described in Patent Document 1, a light source unit including a PCB substrate and a plurality of LEDs and a reflection sheet provided on the surface of the PCB substrate is formed, and on the back side of the liquid crystal display panel facing the light source unit. It has an illuminating device in which a diffuser plate is arranged. The LED, which is a light source, faces the light receiving surface of the diffusion plate at an angle that is substantially perpendicular to the light receiving surface, and directly irradiates the light receiving surface with light. Then, by inserting the protrusions provided on the frame that accommodates the PCB substrate into the holes provided on the PCB substrate, the mutual positions can be accurately fixed without using screws or the like, and the distance between the liquid crystal display panel and the light source Describes that luminance unevenness due to uneven reflection due to the presence of a screw or the like can be prevented even when is short.

JP 2010-210891 A (page 6, FIG. 2)

However, in the conventional illuminating device described in Patent Document 1, the light source LED faces the light receiving surface of the diffusing plate at an angle substantially perpendicular to the light receiving surface and directly irradiates the light receiving surface. If the distance between the light source and the diffusion plate is reduced by reducing the distance between the light source and the diffusion plate, the air layer between the light source and the diffusion plate becomes thin, and there is a high possibility that light scattering in the air layer is reduced. Furthermore, if the distance between the light source and the diffusion plate is shortened, the spread of light from the light source to the diffusion plate is reduced, so that there is a high possibility that the irradiation area of the light source on the diffusion plate is narrowed. For these reasons, there is a possibility that uneven brightness tends to occur, and there is a possibility that the amount of light is insufficient at the edge of the screen of a liquid crystal display panel or the like, resulting in darkness. As a result, there is a concern that it becomes impossible to uniformly illuminate as the illumination device becomes thinner.

The present invention has been made in view of the above points, and provides an illuminating device that can illuminate uniformly without uneven brightness even when the distance between the light source and the diffusion plate is relatively shortened by reducing the thickness. For the purpose. Moreover, it aims at providing the display apparatus provided with such an illuminating device.

In order to solve the above problems, an illumination device according to the present invention receives a light source that emits light, a reflecting member that reflects light emitted from the light source, and receives and diffuses light reflected by the reflecting member. A light diffusing plate, the light source is disposed in a direction to irradiate the light in a direction away from the light receiving surface of the light diffusing plate, and the light reflected from the light source is disposed on the reflecting member. The diffusing plate is arranged so as to be reflected toward the light receiving surface.

According to this configuration, the light from the light source is once irradiated in a direction away from the light receiving surface of the diffusion plate, and then reflected by the reflecting member toward the light receiving surface of the diffusion plate. Thereby, the distance until the light from the light source reaches the diffusion plate is longer than when the light source is opposed to the light receiving surface of the diffusion plate at an angle substantially perpendicular to the light receiving surface and the light is directly applied to the light receiving surface.

Further, in the illumination device having the above-described configuration, the apparatus includes a main substrate on which the light source is arranged, and the diffusion plate is arranged so that the light receiving surface of the diffusion plate faces the light source arrangement surface of the main substrate, A light source is arranged in such a direction as to irradiate the light toward the arrangement surface of the main substrate.

According to this configuration, light is emitted from the light source toward the light source arrangement surface of the main substrate. For example, the light emitted from the light source by the reflecting member provided near the arrangement surface of the main substrate is applied to the light receiving surface of the diffusion plate. Reflected towards.

Further, the illumination device having the above-described configuration includes a support member that is disposed between the light source and the main substrate and supports the light source in a direction in which the light is emitted toward the arrangement surface of the main substrate. It is characterized by.

According to this configuration, the light source can be arranged on the main substrate while being set in advance on the support member so that the light is emitted toward the light source placement surface of the main substrate. The support member may be fixed to the main board using screws or an adhesive sheet.

In the illumination device having the above-described configuration, the support member is a plate-like member having a slope portion that is bent and inclined with respect to the arrangement surface of the main substrate, and supports the light source by the slope portion. It is characterized by that.

According to this configuration, the light source is arranged on the main substrate so as to emit light in a direction away from the light receiving surface of the diffusion plate with a simple structure of a plate-like member.

Further, in the illumination device having the above configuration, the light source is disposed on one surface of the inclined surface portion of the support member facing the arrangement surface side of the main substrate, and the reflecting member is disposed on the inclined surface of the support member. It is characterized by being arranged on the other surface of the part.

According to this configuration, since the support member that supports the light source is used for the arrangement of the reflection member, it is easy to set the arrangement conditions such as the attachment position and the attachment angle of the reflection member.

Further, in the illumination device having the above-described configuration, the support member is a fallen triangular columnar member having a slope portion that is inclined with respect to the arrangement surface of the main substrate, and the light source is supported by the slope portion. It is characterized by that.

According to this configuration, since the support member of the light source is formed of a triangular prism member that is inclined with respect to the arrangement surface of the main substrate, the light source is supported in a state in which the direction in which the light of the light source is irradiated is stabilized.

Further, in the illumination device having the above-described configuration, the support member made of a triangular prism-shaped member that has been laid down has two inclined portions that are inclined at different angles with respect to the arrangement surface of the main substrate, and the light source However, it is characterized in that it is arranged on one of the inclined portions of the supporting member facing the arrangement surface side of the main substrate, and the reflecting member is arranged on the other inclined portion of the supporting member.

According to this configuration, since the support member of the light source is used for the arrangement of the reflection member, it is easy to set the arrangement conditions such as the attachment position and the attachment angle of the reflection member, and the direction in which the light from the light source is reflected is stable. To do.

Further, in the illumination device having the above-described configuration, the support member includes an electrical wiring that electrically connects the light source and the main substrate.

According to this configuration, it is not necessary to separately prepare an electric wiring for electrically connecting the light source and the main board.

In the illumination device having the above-described configuration, the plurality of light sources arranged side by side on the one surface of the main substrate, and the plurality of reflection members provided corresponding to the plurality of light sources, respectively, The plurality of light sources and the plurality of reflecting members are arranged so that light emitted from the light sources is directed in the same direction.

According to this configuration, the amount of light increases on the end side in the direction in which the light emitted from the light source is directed to brighten, and uneven brightness is avoided.

In the illumination device having the above-described configuration, the plurality of light sources arranged side by side on the one surface of the main substrate, and the plurality of reflection members provided corresponding to the plurality of light sources, respectively, The plurality of light sources and the plurality of reflecting members are arranged such that light emitted from the light source faces outward from one side in the arrangement region of the plurality of light sources.

According to this configuration, the amount of light increases in the entire region including the outer edge portion of the apparatus, thereby brightening and avoiding uneven brightness.

In the illumination device having the above-described configuration, the plurality of light sources arranged side by side on the one surface of the main substrate, and the plurality of reflection members provided corresponding to the plurality of light sources, respectively, The plurality of light sources and the plurality of reflecting members are arranged so that light emitted from the light source draws a plurality of polygonal shapes.

According to this configuration, the amount of light is increased and brightened in the entire area, and uneven brightness is avoided.

Further, the present invention is characterized in that a display device includes the lighting device.

According to the configuration of the present invention, the distance until the light from the light source reaches the diffusion plate as compared with the case where the light source is opposed to the light receiving surface of the diffusion plate at an angle substantially perpendicular to the light receiving surface and the light is directly irradiated to the light receiving surface Therefore, the scattering of light in the air layer between the light source and the diffusion plate becomes relatively large. Furthermore, the spread of light from the light source to the diffusion plate is also larger than when the light source is opposed to the light receiving surface of the diffusion plate at an angle substantially perpendicular to the light receiving surface and the light is directly irradiated. The irradiation area by the light source for the plate is also relatively wide. These effects can be easily obtained by using a support member having a simple structure including a plate-like member. Therefore, it is possible to provide an illuminating device that can illuminate uniformly without uneven brightness even when the distance between the light source and the diffusing plate is relatively short while having a simple structure. In addition, it is possible to provide a display device including such a lighting device and capable of displaying an image or the like uniformly without uneven luminance.

1 is an exploded perspective view of a liquid crystal display device (display device) including a backlight unit (illumination device) according to a first embodiment of the present invention. It is a partial vertical sectional view of the light emitting module and the diffusion plate of the backlight unit according to the first embodiment. It is a top view which shows the irradiation direction of LED (light source) of the backlight unit which concerns on 1st Embodiment. It is a vertical sectional view showing the vicinity of LEDs of the backlight unit according to the first embodiment. It is a vertical sectional view showing the vicinity of LEDs of a backlight unit according to a second embodiment of the present invention. It is a vertical sectional view showing the vicinity of LEDs of a backlight unit according to a third embodiment of the present invention. It is a vertical sectional view showing the vicinity of LEDs of a backlight unit according to a fourth embodiment of the present invention. It is a vertical sectional view showing the vicinity of LEDs of a backlight unit according to a fifth embodiment of the present invention. It is a vertical sectional view showing the vicinity of LEDs of a backlight unit according to a sixth embodiment of the present invention. It is a vertical sectional view showing the vicinity of LEDs of a backlight unit according to a seventh embodiment of the present invention. It is vertical sectional drawing which shows LED vicinity of the backlight unit which concerns on the 8th Embodiment of this invention. It is a top view which shows the irradiation direction of LED of the backlight unit which concerns on the 9th Embodiment of this invention. It is a top view which shows the irradiation direction of LED of the backlight unit which concerns on the 10th Embodiment of this invention. It is a top view which shows the irradiation direction of LED of the backlight unit which concerns on the 11th Embodiment of this invention. It is a top view which shows the irradiation direction of LED of the backlight unit which concerns on the 12th Embodiment of this invention. It is a top view which shows the irradiation direction of LED of the backlight unit which concerns on the 13th Embodiment of this invention.

Hereinafter, embodiments of the present invention will be described with reference to FIGS. Here, a liquid crystal display device will be described as an example of the display device of the present invention provided with a backlight unit as an example of the illumination device of the present invention.

First, the structure of the liquid crystal display device including the backlight unit according to the first embodiment of the present invention will be described with reference to FIG. FIG. 1 is an exploded perspective view of a liquid crystal display device including a backlight unit according to the first embodiment.

The liquid crystal display device 1 is a display device using liquid crystal for displaying images, and has a substantially rectangular shape (rectangular shape) in a plan view extending long in the left-right direction. The liquid crystal display device 1 includes a liquid crystal display panel 10 and a backlight unit 20 as shown in FIG.

The liquid crystal display panel 10 includes an active matrix substrate 11, a counter substrate 12, and a polarizing sheet 13. The counter substrate 12 may be called a color filter substrate.

The active matrix substrate 11 includes a switching element and a pixel electrode made of TFT (Thin Film Transistor) (not shown) on a predetermined surface thereof, and further, a gate line (scanning line) and a source line electrically connected to the switching element. (Data line). The counter substrate 12 includes a common electrode (not shown) on the predetermined surface and, if necessary, a color filter. Each of the active matrix substrate 11 and the counter substrate 12 is covered with an alignment film (not shown) capable of aligning liquid crystals in a specific direction.

Then, the active matrix substrate 11 and the counter substrate 12 are bonded to each other through a sealing material (not shown) so that their predetermined surfaces face each other. Further, liquid crystal is sealed between the active matrix substrate 11 and the counter substrate 12. Thereby, the liquid crystal is sandwiched between the pixel electrode of the active matrix substrate 11 and the common electrode of the counter substrate 12.

The polarizing sheet 13 is affixed to each of the surfaces opposite to the predetermined surfaces of the active matrix substrate 11 and the counter substrate 12 enclosing the liquid crystal. The polarizing sheet 13 is a sheet that transmits only a light wave in a specific vibration direction, and is attached in a state where the transmission axis directions of the two polarizing sheets 13 are shifted from each other by about 90 °.

The liquid crystal display panel 10 having such a configuration adjusts the orientation of the liquid crystal by an electric field generated between the pixel electrode of the active matrix substrate 11 and the common electrode of the counter substrate 12 based on the video signal, and transmits light transmitted through the liquid crystal. Change the transmittance.

The backlight unit 20 is a lighting device adopting a direct type as an illumination system, and includes a backlight chassis 21, a light emitting module 30, a diffusion plate 22, a prism sheet 23, and a lens sheet 24.

The backlight chassis 21 is formed in a box shape having a substantially rectangular shape in plan view with an opening on the liquid crystal display panel 10 side. The backlight chassis 21 accommodates the light emitting module 30 inside thereof, that is, on the inner bottom surface 21a side.

The light emitting module 30 is a module that emits light for generating backlight light, and is housed inside the backlight chassis 21 and disposed below the liquid crystal display panel 10. The light emitting module 30 includes a plate-like main substrate 31 having a substantially rectangular shape in plan view, a plurality of LEDs 32 as light sources, an LED substrate 33 on which the LEDs 32 are mounted, and a reflection sheet 34 as a reflection member.

The LEDs 32 are configured by, for example, white LEDs (light emitting diodes) that emit white light, and a plurality of LEDs 32 are arranged in a substantially grid-like array across the arrangement surface 31 a of the main substrate 31 via the LED substrate 33. . In the present embodiment, for example, 64 LEDs 32 are arranged on the arrangement surface 31 a of the main substrate 31. The interval between each of the plurality of LEDs 32 is set to 5 mm to 30 mm, for example. The light source is not limited to the LED, and the LED itself is not limited to one that emits white light. Further, the number and arrangement method of the LEDs 32 are not limited to the above and the shape shown in FIG. The light emitted from the LED 32 is reflected by the reflection sheet 34 and guided toward the diffusion plate 22.

The diffuser plate 22, the prism sheet 23, and the lens sheet 24 are arranged so as to close the opening of the backlight chassis 21, and cover the light emitting module 30 from the liquid crystal display panel 10 side.

Among the diffusion plate 22, the prism sheet 23, and the lens sheet 24, the diffusion plate 22 is disposed closest to the light emitting module 30 and directly receives light emitted from the light emitting module 30. The diffusing plate 22 is disposed such that the light receiving surface 22a of the light emitted from the light emitting module 30 faces the arrangement surface 31a of the LED 32 of the main substrate 31 in parallel (see FIG. 2). The distance from the LED 32 to the diffusion plate 22 is set to 5 mm to 20 mm, for example. The diffusion plate 22 receives and diffuses the light emitted from the LEDs 32 and reflected by the reflection sheet 34, and spreads the light over the entire area of the liquid crystal display panel 10.

The prism sheet 23 is provided so as to overlap the liquid crystal display panel 10 side of the diffusion plate 22. In the prism sheet 23, for example, triangular prisms extending linearly in one direction are arranged in a direction intersecting in one direction within the sheet surface. The prism sheet 23 deflects the radiation characteristic of light from the diffusion plate 22.

The lens sheet 24 is provided so as to overlap the prism sheet 23 on the liquid crystal display panel 10 side. In the lens sheet 24, fine particles that refract and scatter light are dispersed inside. The lens sheet 24 suppresses the difference in brightness that causes unevenness in the amount of light without locally condensing from the prism sheet 23.

The backlight unit 20 having such a configuration illuminates the back surface of the liquid crystal display panel 10 by irradiating a uniform and uniform backlight light in a planar shape. Since the liquid crystal display panel 10 changes the transmittance of the backlight that transmits the liquid crystal based on the video signal, a desired video is displayed on the display screen of the liquid crystal display panel 10.

Subsequently, a detailed configuration of the light emitting module 30 will be described with reference to FIGS. 2 to 4 in addition to FIG. 2 is a partial vertical sectional view of the light emitting module 30 and the diffusion plate 22, FIG. 3 is a plan view showing the irradiation direction of the LED 32 as a light source, and FIG. 4 is a vertical sectional view showing the vicinity of the LED 32.

The plurality of LEDs 32 arranged side by side on the arrangement surface 31a of the main substrate 31 via the LED substrate 33 are inclined with respect to the arrangement surface 31a so that the light emitted from the LEDs 32 faces the same direction as shown in FIG. Is provided. In addition, the arrow drawn in FIG. 3 has shown the direction (irradiation direction) to which the light irradiated from LED32 faces. In this example, the LEDs 32 are arranged so that the light emitted from all the LEDs 32 faces upward in FIG. 3 with respect to the main substrate 31 having a substantially rectangular shape in plan view extending long in the left-right direction in FIG.

Regarding each LED 32, as shown in FIG. 4, the LED 32 is mounted on a plate-like LED substrate 33, and the LED substrate 33 is attached to the main substrate 31. Both the main board 31 and the LED board 33 are provided with electrical wiring (not shown) that is electrically connected. The electrical wiring is connected to the LED 32 to supply power for light emission.

The LED 32 is mounted in close contact with the surface of the LED substrate 33, and the LED substrate 33 is attached to the arrangement surface 31a of the main substrate 31 at an angle θ1. Thereby, the LED 32 is directed through the main substrate 31 via the LED substrate 33 in a direction in which light is emitted in a direction away from the light receiving surface 22a of the diffusion plate 22, that is, in a direction in which light is emitted toward the arrangement surface 31a of the main substrate 31. Is arranged. The inclination angle θ1 with respect to the LED substrate 33, that is, the LED 32 placement surface 31a, can be arbitrarily set between 30 ° and 80 °, for example. By setting the inclination angle θ1 to less than 90 °, the LED 32 emits light in a direction away from the light receiving surface 22a of the diffusion plate 22, that is, emits light toward the arrangement surface 31a of the main substrate 31. become.

Further, the reflection sheet 34 is provided on the arrangement surface 31 a side of the main substrate 31 in the light irradiation direction of the LEDs 32 corresponding to each of the plurality of LEDs 32. The reflection sheet 34 is arranged so that a part of the reflection sheet 34 is inclined at an angle θ2 with respect to the arrangement surface 31a of the main substrate 31 in a direction in which the light emitted from the LEDs 32 is reflected toward the light receiving surface 22a of the diffusion plate 22. ing. The inclination angle θ2 of the reflection sheet 34 with respect to the arrangement surface 31a can be arbitrarily set, for example, between 30 ° and 80 °.

Thus, the light of the LED 32 is once irradiated in a direction away from the light receiving surface 22a of the diffusion plate 22, and then reflected by the reflection sheet 34 toward the light receiving surface 22a of the diffusion plate 22. As a result, as illustrated in FIG. 2 by the two-dot chain line, the LED 32 light is emitted from the case where the LED 32 is opposed to the light receiving surface 22a of the diffusion plate 22 at an angle substantially perpendicular to the light receiving surface 22a. The distance to reach the diffusion plate 22 becomes longer. Further, since each LED 32 is arranged so that light emitted from the plurality of LEDs 32 faces in the same direction, the amount of light increases on the end side in the direction in which the light emitted from the LED 32 faces, for example, on the upper side in FIG. As a result, it becomes brighter and the occurrence of uneven brightness is avoided.

According to the configuration of the above embodiment of the present invention, when the LED 32 is opposed to the light receiving surface 22a of the diffusion plate 22 at an angle that is substantially perpendicular to the light receiving surface 22a, the light is directly irradiated (two points in FIG. 2). Since the distance until the light of the LED 32 reaches the diffusion plate 22 becomes longer than the chain line), the light scattering in the air layer between the LED 32 and the diffusion plate 22 becomes relatively large. Further, the spread of light from the LED 32 to the diffusion plate 22 is also larger than that in the case where the LED 32 is opposed to the light receiving surface 22a of the diffusion plate 22 at an angle substantially perpendicular to the light receiving surface 22a and the light is directly irradiated. Therefore, the irradiation area of the diffusion plate 22 by the LED 32 is also relatively wide (see the shaded portion in FIG. 2). These effects can be easily obtained by the simple structure described above. Therefore, it is possible to provide the backlight unit 20 that is a lighting device that has a simple structure and can be illuminated uniformly without luminance unevenness. Further, it is possible to provide the liquid crystal display panel 10, which is a display device provided with such a backlight unit 20 and capable of displaying images and the like uniformly without luminance unevenness.

Next, a backlight unit 20 that is a display device according to a second embodiment of the present invention will be described with reference to FIG. FIG. 5 is a vertical sectional view showing the vicinity of the LED 32 which is a light source of the backlight unit 20 according to the second embodiment. Since the basic configuration of this embodiment is the same as that of the first embodiment described with reference to FIGS. 1 to 4, the same reference numerals are used for the same constituent elements as those of the first embodiment. The description of the drawings and the description thereof will be omitted.

As shown in FIG. 5, the backlight unit 20 according to the second embodiment is mounted such that the LEDs 32 are in close contact with one surface of the plate-like LED substrate 33, and a part of the reflection sheet 34 is the LED substrate 33. It is provided in close contact with the other surface. Thereby, the inclination with respect to the arrangement surface 31a when the LED 32 is arranged in a direction in which light is emitted away from the light receiving surface 22a of the diffusion plate 22, that is, in a direction in which light is emitted toward the arrangement surface 31a of the main substrate 31. The angle θ1 and the inclination angle θ2 with respect to the arrangement surface 31a when the light emitted from the LED 32 is partially reflected toward the light receiving surface 22a of the diffusion plate 22 are arranged to be the same as the angle θ1. Each is arranged on the arrangement surface 31 a of the main substrate 31.

According to the configuration of the second embodiment, as in the first embodiment, the LED 32 is opposed to the light receiving surface 22a of the diffusion plate 22 at an angle that is substantially perpendicular to the light receiving surface 22a, and light is directly irradiated to the light receiving surface 22a. Since the distance until the light of the LED 32 reaches the diffusion plate 22 becomes longer than the case, light scattering in the air layer between the LED 32 and the diffusion plate 22 becomes relatively large. Further, the spread of light from the LED 32 to the diffusion plate 22 is also larger than that in the case where the LED 32 is opposed to the light receiving surface 22a of the diffusion plate 22 at an angle substantially perpendicular to the light receiving surface 22a and the light is directly irradiated. Therefore, the area irradiated by the LED 32 on the diffusion plate 22 is also relatively wide. Therefore, it is possible to provide the backlight unit 20 that has a simple structure and can be illuminated uniformly without luminance unevenness.

Further, the LED 32 is mounted so as to be in close contact with one surface of the plate-like LED substrate 33, and a part of the reflection sheet 34 is provided in close contact with the other surface of the LED substrate 33. It is possible to relatively stabilize the attachment state of the LED 32 and the reflection sheet 34 to the.

Next, a backlight unit 20 that is a display device according to a third embodiment of the present invention will be described with reference to FIG. FIG. 6 is a vertical sectional view showing the vicinity of the LED 32 that is a light source of the backlight unit 20 according to the third embodiment. Since the basic configuration of this embodiment is the same as that of the first embodiment described with reference to FIGS. 1 to 4, the same reference numerals are used for the same constituent elements as those of the first embodiment. The description of the drawings and the description thereof will be omitted.

In the backlight unit 20 according to the third embodiment, as shown in FIG. 6, the LED 32 is mounted so as to be inclined at an angle θ3 with respect to one surface of the LED substrate 33, and a part of the reflection sheet 34 is an LED. It is provided in close contact with the other surface of the substrate 33. The LED board 33 is attached to the arrangement surface 31a of the main board 31 so as to be inclined at an angle θ1. Note that (θ1 + θ3) <90 °. As a result, the LED 32 emits light in a direction away from the light receiving surface 22 a of the diffusion plate 22, that is, in a direction of irradiating light toward the arrangement surface 31 a of the main substrate 31, via the LED substrate 33. And a part of the reflection sheet 34 is arranged to reflect the light emitted from the LED 32 toward the light receiving surface 22 a of the diffusion plate 22.

According to the configuration of the third embodiment, as in the first and second embodiments, the LED 32 is opposed to the light receiving surface 22a of the diffusion plate 22 at an angle that is substantially perpendicular to the light receiving surface 22a. Since the distance until the light of the LED 32 reaches the diffusion plate 22 becomes longer than when the light is irradiated, the scattering of light in the air layer between the LED 32 and the diffusion plate 22 is relatively increased. Further, the spread of light from the LED 32 to the diffusion plate 22 is also larger than that in the case where the LED 32 is opposed to the light receiving surface 22a of the diffusion plate 22 at an angle substantially perpendicular to the light receiving surface 22a and the light is directly irradiated. Therefore, the area irradiated by the LED 32 on the diffusion plate 22 is also relatively wide. Therefore, it is possible to provide the backlight unit 20 that has a simple structure and can be illuminated uniformly without luminance unevenness.

Further, the LED 32 is mounted with an inclination at an angle θ3 with respect to one surface of the LED substrate 33, and the LED substrate 33 is attached with an inclination at an angle θ1 with respect to the arrangement surface 31a of the main substrate 31. Therefore, it is possible to easily adjust the irradiation direction of the LED 32 by arbitrarily changing the inclination angle θ3 as appropriate in accordance with the arrangement location on the arrangement surface 31a of the main substrate 31.

Next, a backlight unit 20 that is a display device according to a fourth embodiment of the present invention will be described with reference to FIG. FIG. 7 is a vertical sectional view showing the vicinity of the LED 32 that is a light source of the backlight unit 20 according to the fourth embodiment. Since the basic configuration of this embodiment is the same as that of the first embodiment described with reference to FIGS. 1 to 4, the same reference numerals are used for the same constituent elements as those of the first embodiment. The description of the drawings and the description thereof will be omitted.

7, the backlight unit 20 according to the fourth embodiment is mounted on the LED substrate 33 by arranging two LEDs 32 in a direction away from the attachment position of the LED substrate 33 to the main substrate 31. Three or more LEDs 32 may be arranged and mounted on the LED substrate 33.

According to the configuration of the fourth embodiment, the LED 32 is opposed to the light receiving surface 22a of the diffusion plate 22 at an angle that is substantially perpendicular to the light receiving surface 22a, and the LED 32 is directly irradiated with light. Scattering of light emitted from the light source is further increased, and the irradiation region is further widened. Therefore, it is possible to provide the backlight unit 20 that has a simple structure and can be illuminated uniformly without luminance unevenness.

Next, a backlight unit 20 that is a display device according to a fifth embodiment of the present invention will be described with reference to FIG. FIG. 8 is a vertical sectional view showing the vicinity of the LED 32 that is the light source of the backlight unit 20 according to the fifth embodiment. Since the basic configuration of this embodiment is the same as that of the first embodiment described with reference to FIGS. 1 to 4, the same reference numerals are used for the same constituent elements as those of the first embodiment. The description of the drawings and the description thereof will be omitted.

In the backlight unit 20 according to the fifth embodiment, a support member 35 is disposed between the main board 31 and the LED board 33 as shown in FIG. The support member 35 is a plate-like member that extends along the arrangement surface 31 a of the main substrate 31 and is bent so as to form an acute angle when viewed from the side surface.

The support member 35 is attached so as to be in contact with the arrangement surface 31a of the main substrate 31, a bent portion 35b, and a slope portion that is bent by the bent portion 35b and is inclined with respect to the arrangement surface 31a of the main substrate 31. 35c. The LED 32 is arranged in close contact with one surface of the inclined portion 35c of the support member 35 facing the arrangement surface 31a side of the main substrate 31, and a part of the reflection sheet 34 is arranged on the other surface of the inclined portion 35c. Has been. The reflective sheet 34 corresponding to the LED 32 is provided on one surface of the slope portion 35c of the support member 35 disposed in front of the irradiation direction of the LED 32 so as to face the LED 32. Thus, since the support member 35 supports the LED 32 via the LED substrate 33 at the inclined portion 35c, the LED 32 is inclined at an angle θ1 with respect to the arrangement surface 31a of the main substrate 31 and emits light toward the arrangement surface 31a. It arrange | positions at the main board | substrate 31 in the direction to irradiate.

Further, the support member 35 is fixed to the main board 31 using screws 36. At this time, the support member 35 is fixed to the main board 31 so that the electric wiring 35d provided on the support member 35 and the electric wiring 31b provided on the arrangement surface 31a of the main board 31 are electrically connected. Thereby, the LED 32 and the main board 31 are electrically connected via the LED board 33, and power for light emission is supplied to the LED 32.

According to the configuration of the fifth embodiment, the light of the LED 32 is once irradiated in the direction away from the light receiving surface 22a of the diffusion plate 22 by the support member 35 having a simple structure called a plate-like member, and then the reflection sheet. 34 is reflected toward the light receiving surface 22 a of the diffusion plate 22. Therefore, as in the first and second embodiments, it is possible to provide the backlight unit 20 that has a simple structure and can be illuminated uniformly without luminance unevenness.

Further, since the support member 35 that supports the LED 32 is used for the arrangement of the reflection sheet 34, it is easy to set the arrangement conditions such as the attachment position and the attachment angle of the reflection sheet 34.

Further, since the support member 35 includes the electrical wiring 35d that electrically connects the LED 32 and the main substrate 31, it also serves as a printed circuit board, and it is not necessary to prepare a separate electrical wiring. Improvement and cost reduction can be achieved. Furthermore, since the effect | action which thermally radiates the heat | fever of LED board 33 using the supporting member 35 can also be anticipated, it is possible to suppress the fall of the luminous efficiency of LED32 resulting from heat_generation | fever, generation | occurrence | production of a malfunction, etc.

Next, a backlight unit 20 that is a display device according to a sixth embodiment of the present invention will be described with reference to FIG. FIG. 9 is a vertical sectional view showing the vicinity of the LED 32 that is the light source of the backlight unit 20 according to the sixth embodiment. Since the basic configuration of this embodiment is the same as that of the first embodiment described with reference to FIGS. 1 to 4, the same reference numerals are used for the same constituent elements as those of the first embodiment. The description of the drawings and the description thereof will be omitted.

In the backlight unit 20 according to the sixth embodiment, a support member 35 is disposed between the main board 31 and the LED board 33 as shown in FIG. The support member 35 is a plate-like member that extends along the arrangement surface 31a of the main substrate 31 and is bent so as to form an obtuse angle when viewed from the side surface.

The support member 35 is attached so as to be in contact with the arrangement surface 31a of the main substrate 31, a bent portion 35b, and a slope portion that is bent by the bent portion 35b and is inclined with respect to the arrangement surface 31a of the main substrate 31. 35c. Since the support member 35 supports the LED 32 via the LED substrate 33 at the inclined portion 35c, the LED 32 irradiates light toward the arrangement surface 31a at an angle θ1 with respect to the arrangement surface 31a of the main substrate 31. It is arranged on the main board 31 in such a direction.

According to the configuration of the sixth embodiment, as in the fifth embodiment, the light of the LED 32 is once separated in the direction away from the light receiving surface 22a of the diffusion plate 22 by the support member 35 having a simple structure called a plate-like member. After irradiation, the light is reflected by the reflection sheet 34 toward the light receiving surface 22a of the diffusion plate 22. Therefore, it is possible to provide the backlight unit 20 that has a simple structure and can be illuminated uniformly without luminance unevenness.

Next, a backlight unit 20 that is a display device according to a seventh embodiment of the present invention will be described with reference to FIG. FIG. 10 is a vertical sectional view showing the vicinity of the LED 32 that is the light source of the backlight unit 20 according to the seventh embodiment. Since the basic configuration of this embodiment is the same as that of the first embodiment described with reference to FIGS. 1 to 4, the same reference numerals are used for the same constituent elements as those of the first embodiment. The description of the drawings and the description thereof will be omitted.

In the backlight unit 20 according to the seventh embodiment, a support member 35 is disposed between the main board 31 and the LED board 33 as shown in FIG. The support member 35 is a plate-like member that extends along the arrangement surface 31a of the main substrate 31 and is bent so as to form an obtuse angle when viewed from the side surface.

The support member 35 is bent by the mounting portion 35a inserted substantially perpendicularly to the arrangement surface 31a of the main substrate 31, a bent portion 35b, and the bent portion 35b, and is inclined with respect to the arrangement surface 31a of the main substrate 31. And an inclined surface portion 35c. Since the support member 35 supports the LED 32 via the LED substrate 33 at the inclined portion 35c, the LED 32 irradiates light toward the arrangement surface 31a at an angle θ1 with respect to the arrangement surface 31a of the main substrate 31. It is arranged on the main board 31 in such a direction.

According to the configuration of the seventh embodiment, similarly to the fifth and sixth embodiments, the light of the LED 32 is separated from the light receiving surface 22a of the diffusion plate 22 by the support member 35 having a simple structure called a plate member. After being irradiated once in the direction, the light is reflected by the reflection sheet 34 toward the light receiving surface 22 a of the diffusion plate 22. Therefore, it is possible to provide the backlight unit 20 that has a simple structure and can be illuminated uniformly without luminance unevenness.

Next, a backlight unit 20 that is a display device according to an eighth embodiment of the present invention will be described with reference to FIG. FIG. 11 is a vertical sectional view showing the vicinity of the LED 32 that is the light source of the backlight unit 20 according to the eighth embodiment. Since the basic configuration of this embodiment is the same as that of the first embodiment described with reference to FIGS. 1 to 4, the same reference numerals are used for the same constituent elements as those of the first embodiment. The description of the drawings and the description thereof will be omitted.

In the backlight unit 20 according to the eighth embodiment, a support member 37 is disposed between the main board 31 and the LED board 33 as shown in FIG. The support member 37 is formed of a triangular prism-shaped member that extends along the arrangement surface 31 a of the main substrate 31.

The support member 37 has

slope portions

37 a and 37 b that are inclined at different angles with respect to the arrangement surface 31 a of the main substrate 31. Then, the LED 32 is arranged so as to be in close contact with one inclined surface portion 37a of the support member 37 facing the arrangement surface 31a side of the main substrate 31, and a part of the reflection sheet 34 is arranged in close contact with the other inclined surface portion 37b. Has been. The reflection sheet 34 corresponding to the LED 32 is provided on one inclined surface portion 37b of the support member 37 disposed in front of the irradiation direction of the LED 32 so as to face the LED 32. Thus, since the support member 37 supports the LED 32 via the LED substrate 33 on the inclined surface portion 37a, the LED 32 is inclined toward the arrangement surface 31a at an angle θ1 with respect to the arrangement surface 31a of the main substrate 31. It arrange | positions at the main board | substrate 31 in the direction to irradiate.

Note that the support member 37 is fixed to the main substrate 31 by using an adhesive sheet 38.

According to the configuration of the eighth embodiment, the light of the LED 32 is once irradiated in the direction away from the light receiving surface 22a of the diffuser plate 22 by the support member 37 having a simple structure, and then the diffuser plate by the reflection sheet 34. The light is reflected toward the light receiving surface 22a. Therefore, it is possible to provide the backlight unit 20 that has a simple structure and can be illuminated uniformly without luminance unevenness.

In addition, since the support member 37 of the LED 32 is formed of a triangular prism member that is inclined with respect to the arrangement surface 31a of the main substrate 31, the LED 32 is supported in a state in which the direction in which the light of the LED 32 is irradiated is stabilized. Thereby, it is possible to further improve the effect of uniformly illuminating the backlight unit 20 without uneven brightness.

Next, a backlight unit 20 that is a display device according to a ninth embodiment of the present invention will be described with reference to FIG. FIG. 12 is a plan view showing an irradiation direction of the LED 32 that is a light source of the backlight unit 20 according to the ninth embodiment. FIG. 12 is a view showing a plurality of LEDs 32 arranged on the main board 31 as in FIG. 3, and drawing of the main board 31, the LED board 33, and the reflection sheet 34 is omitted. In addition, since the basic configuration of this embodiment is the same as that of the first embodiment described with reference to FIGS. 1 to 4, the same reference numerals are assigned to the same components as those of the first embodiment. The description of the drawings and the description thereof will be omitted.

As shown in FIG. 12, the backlight unit 20 according to the ninth embodiment is all over the main board 31 (not shown in FIG. 12, see FIG. 3) having a substantially rectangular shape in plan view extending long in the left-right direction. The LED 32 is arranged so that the light emitted from the LED 32 faces rightward. In addition, the arrow drawn in FIG. 12 has shown the direction (irradiation direction) to which the light irradiated from LED32 faces.

According to the configuration of the ninth embodiment, as in the first embodiment, each LED 32 is arranged so that the light emitted from the plurality of LEDs 32 faces in the same direction. The amount of light is increased and brightened on the end side in the direction of the direction, for example, on the right side in FIG. 12, and uneven brightness is avoided. Therefore, it is possible to provide the backlight unit 20 that has a simple structure and can be illuminated uniformly without luminance unevenness.

The direction in which the light emitted from the LED 32 faces is not limited to the upper side in FIG. 3 of the first embodiment or the right side in FIG. 12 of the ninth embodiment, but as shown in FIG. 3 or FIG. The LED 32 may be directed downward or to the left when the main board 31 is viewed in plan. Further, the LED 32 may be directed in an oblique direction when the main substrate 31 is viewed in plan. Further, as described above, the inclination angle θ1 (for example, see FIG. 4) with respect to the arrangement surface 31a for arranging the LEDs 32 in the direction in which the LEDs 32 emit light toward the arrangement surface 31a of the main substrate 31 is, for example, 30 ° to 80 °. It can be set arbitrarily between °. Similarly, an inclination angle θ2 (see, for example, FIG. 4) with respect to the arrangement surface 31a for arranging the reflection sheet 34 in a direction in which the light emitted from the LED 32 is reflected toward the light receiving surface 22a of the diffusion plate 22 is also, for example, 30 °. It can be arbitrarily set between ˜80 °.

Next, a backlight unit 20 that is a display device according to a tenth embodiment of the present invention will be described with reference to FIG. FIG. 13 is a plan view showing an irradiation direction of the LED 32 that is a light source of the backlight unit 20 according to the tenth embodiment. FIG. 13 is a drawing showing a plurality of LEDs 32 arranged on the main board 31 as in FIG. 3, and the drawing of the main board 31, the LED board 33, and the reflection sheet 34 is omitted. In addition, since the basic configuration of this embodiment is the same as that of the first embodiment described with reference to FIGS. 1 to 4, the same reference numerals are assigned to the same components as those of the first embodiment. The description of the drawings and the description thereof will be omitted.

In the backlight unit 20 according to the tenth embodiment, as shown in FIG. 13, the light emitted from the plurality of LEDs 32 faces outward from the one side X <b> 1 drawn by a two-dot chain line in the arrangement region of the plurality of LEDs 32. A plurality of LEDs 32 are arranged. In addition, the arrow drawn in FIG. 13 has shown the direction (irradiation direction) to which the light irradiated from LED32 faces. Since one side X1 in the arrangement area of the plurality of LEDs 32 extends in the left-right direction at the center in the vertical direction in FIG. 13, the LED 32 above the one side X1 is directed upward, and the LED 32 below the one side X1 is It is inclined to irradiate light downward.

The length of the arrow in FIG. 13 indicates the ratio of the distance until the light emitted from each LED 32 reaches the diffusion plate 22. This is because the LED 32 has an inclination angle θ1 (see, for example, FIG. 4) with respect to the arrangement surface 31a for arranging the LED 32 in the direction in which light is emitted toward the arrangement surface 31a of the main substrate 31, and the light emitted from the LED 32 is a diffusion plate. This is related to the magnitude of the inclination angle θ2 (see, for example, FIG. 4) with respect to the arrangement surface 31a for arranging the reflection sheet 34 in the direction of reflection toward the light receiving surface 22a. If the tilt angle θ1 is relatively small or the tilt angle θ2 is relatively large, the distance until the light reaches the diffusion plate 22 is relatively short (the arrow in FIG. 13 is relatively short), and the tilt angle θ1 is relatively large or When the inclination angle θ2 is relatively small, the distance until the light reaches the diffusion plate 22 is relatively long (the arrow in FIG. 13 is relatively long). In FIG. 13, the LED 32 and / or the reflection sheet 34 are arranged on the main substrate 31 so that the distance until the light reaches the diffusion plate 22 becomes longer as the distance from the one side X <b> 1 in the LED 32 arrangement region increases. .

According to the configuration of the tenth embodiment, each LED 32 is arranged so that the light emitted from the plurality of LEDs 32 faces outward from the one side X1 in the arrangement region of the plurality of LEDs 32. In the entire area including, the amount of light increases and the brightness is increased, and the occurrence of uneven brightness is avoided. Therefore, it is possible to provide the backlight unit 20 that has a simple structure and can be illuminated uniformly without luminance unevenness.

Next, a backlight unit 20 that is a display device according to an eleventh embodiment of the present invention will be described with reference to FIG. FIG. 14 is a plan view showing an irradiation direction of the LED 32 that is a light source of the backlight unit 20 according to the eleventh embodiment. 14 is a drawing showing a plurality of LEDs 32 arranged on the main board 31 as in FIG. 3, and the drawing of the main board 31, the LED board 33, and the reflection sheet 34 is omitted. In addition, since the basic configuration of this embodiment is the same as that of the first embodiment described with reference to FIGS. 1 to 4, the same reference numerals are assigned to the same components as those of the first embodiment. The description of the drawings and the description thereof will be omitted.

In the backlight unit 20 according to the eleventh embodiment, as shown in FIG. 14, the light emitted from the plurality of LEDs 32 faces outward from the one side X <b> 2 drawn by a two-dot chain line in the arrangement region of the plurality of LEDs 32. A plurality of LEDs 32 are arranged. In addition, the arrow drawn in FIG. 14 has shown the direction (irradiation direction) to which the light irradiated from LED32 faces. Since one side X2 in the arrangement region of the plurality of LEDs 32 extends in the vertical direction at the center in the left-right direction in FIG. 14, the LED 32 on the right side of the one side X2 is directed rightward, and the LED 32 on the left side of the one side X2 is It is inclined to irradiate light toward the left.

The length of the arrow indicates the ratio of the distance until the light emitted from each LED 32 reaches the diffusion plate 22. In FIG. 14, the LED 32 and / or the reflection sheet 34 are arranged on the main substrate 31 so that the distance until the light reaches the diffusion plate 22 becomes longer as the distance from the side X2 in the LED 32 arrangement region to the right and left is increased. ing.

According to the configuration of the eleventh embodiment, as in the tenth embodiment, each LED 32 is arranged such that light emitted from the plurality of LEDs 32 faces outward from one side X2 in the arrangement region of the plurality of LEDs 32. As a result, the amount of light increases in the entire area including the outer edge of the apparatus to increase the brightness and avoid the occurrence of uneven brightness. Therefore, it is possible to provide the backlight unit 20 that has a simple structure and can be illuminated uniformly without luminance unevenness.

Note that the direction in which the light emitted from the LED 32 faces is not limited to the vertical direction in FIG. 13 of the tenth embodiment and the horizontal direction in FIG. 14 of the eleventh embodiment. The LED 32 may be directed obliquely. Further, the arrangement of the sides X1 and X2 in the arrangement area of the plurality of LEDs 32 is not limited to the vertical center and the horizontal center, but may be unevenly distributed in the vertical direction or the horizontal direction.

Next, a backlight unit 20 which is a display device according to a twelfth embodiment of the present invention will be described with reference to FIG. FIG. 15 is a plan view showing an irradiation direction of the LED 32 that is a light source of the backlight unit 20 according to the twelfth embodiment. FIG. 15 is a drawing showing a plurality of LEDs 32 arranged on the main board 31, as in FIG. 3, and drawing of the main board 31, the LED board 33, and the reflection sheet 34 is omitted. In addition, since the basic configuration of this embodiment is the same as that of the first embodiment described with reference to FIGS. 1 to 4, the same reference numerals are assigned to the same components as those of the first embodiment. The description of the drawings and the description thereof will be omitted.

In the backlight unit 20 according to the twelfth embodiment, a plurality of LEDs 32 are arranged so that light emitted from the plurality of LEDs 32 draws a plurality of quadrangular shapes as shown in FIG. In addition, the arrow drawn in FIG. 15 has shown the direction (irradiation direction) to which the light irradiated from LED32 faces. In FIG. 15, the light emitted from the four LEDs 32 surrounded by the broken-line quadrangle is drawn in a square so that the light rotates clockwise, upward, rightward, downward, and leftward, or the light is counterclockwise. A quadrilateral is drawn to rotate upward, leftward, downward, and rightward. The reflection sheet 34 (see, for example, FIG. 4) is provided individually corresponding to each LED 32.

According to the configuration of the twelfth embodiment, each LED 32 is arranged so that light emitted from the plurality of LEDs 32 draws a plurality of quadrangular shapes. And the occurrence of uneven brightness is avoided. Therefore, it is possible to provide the backlight unit 20 that has a simple structure and can be illuminated uniformly without luminance unevenness.

Next, a backlight unit 20 which is a display device according to a thirteenth embodiment of the present invention will be described with reference to FIG. FIG. 16 is a plan view showing an irradiation direction of the LED 32 that is a light source of the backlight unit 20 according to the thirteenth embodiment. FIG. 16 is a drawing showing a plurality of LEDs 32 arranged on the main board 31 as in FIG. 3, and drawing of the main board 31, the LED board 33, and the reflection sheet 34 is omitted. In addition, since the basic configuration of this embodiment is the same as that of the first embodiment described with reference to FIGS. 1 to 4, the same reference numerals are assigned to the same components as those of the first embodiment. The description of the drawings and the description thereof will be omitted.

In the backlight unit 20 according to the thirteenth embodiment, a plurality of LEDs 32 are arranged so that light emitted from the plurality of LEDs 32 draws a plurality of octagonal shapes as shown in FIG. In addition, the arrow drawn in FIG. 16 has shown the direction where the light irradiated from LED32 faces. In FIG. 16, the light emitted from the eight LEDs 32 drawn by the hatching sandwiched between double broken octagons is clockwise upward, diagonally upper right, right, diagonally lower right, downward, Draw an octagon to rotate diagonally down left, left and diagonally up left, or light counterclockwise up, diagonal up left, left, diagonal down left, down, diagonal An octagon is drawn to rotate toward the lower right, the right and the diagonally upper right. The reflection sheet 34 (see, for example, FIG. 4) is provided individually corresponding to each LED 32.

According to the configuration of the thirteenth embodiment, each LED 32 is arranged so that the light emitted from the plurality of LEDs 32 draws a plurality of octagonal shapes. And the occurrence of uneven brightness is avoided. Therefore, it is possible to provide the backlight unit 20 that has a simple structure and can be illuminated uniformly without luminance unevenness.

The polygon drawn by the light emitted from the LED 32 is not limited to the quadrangle in FIG. 15 of the twelfth embodiment or the octagon in FIG. 16 of the thirteenth embodiment, but a hexagon or other polygons. It may be.

The embodiment of the present invention has been described above, but the scope of the present invention is not limited to this, and various modifications can be made without departing from the spirit of the invention.

The present invention can be used in an illumination device that irradiates light toward an irradiated object.

1 Liquid crystal display device (display device)
10 Liquid crystal panel 20 Backlight unit (lighting device)
22 Diffusion plate 30 Light emitting module 31 Main substrate 31a Arrangement surface 32 LED (light source)
33 LED substrate 34 Reflective sheet (reflective member)
35 Support member

35c Slope part

35d Electrical wiring 36 Screw 37

Support member

37a, 37b Slope part 38 Adhesive sheet

Claims

A light source that emits light;
A reflecting member that reflects light emitted from the light source;
A diffusion plate that receives and diffuses the light reflected by the reflecting member,
The light source is arranged in a direction to irradiate the light in a direction away from the light receiving surface of the diffusion plate,
The illuminating device according to claim 1, wherein the reflecting member is arranged so as to reflect light emitted from the light source toward the light receiving surface of the diffusion plate.
Comprising a main substrate on which the light source is disposed;
The diffuser plate is disposed such that the light receiving surface of the diffuser plate faces the light source disposition surface of the main substrate,
The lighting device according to claim 1, wherein the light source is arranged in a direction in which the light is irradiated toward the arrangement surface of the main substrate.
3. The support device according to claim 2, further comprising a support member that is disposed between the light source and the main substrate and supports the light source in a direction in which the light is irradiated toward the arrangement surface of the main substrate. Lighting equipment.
4. The support member according to claim 3, wherein the support member is formed of a plate-like member having a slope portion that is bent and inclined with respect to the arrangement surface of the main substrate, and the light source is supported by the slope portion. The lighting device described.
The light source is disposed on one surface of the slope portion of the support member facing the arrangement surface side of the main substrate;
The lighting device according to claim 4, wherein the reflection member is disposed on the other surface of the slope portion of the support member.
The said support member consists of an inclined triangular prism-shaped member which has a slope part which inclines with respect to the said arrangement | positioning surface of the said main board | substrate, and supports the said light source with the said slope part. The lighting device described.
The support member made of a triangular prism-shaped member that has been laid down has two slope portions that are inclined at different angles with respect to the arrangement surface of the main substrate,
The light source is arranged on one of the slope portions of the support member facing the arrangement surface side of the main substrate;
The lighting device according to claim 6, wherein the reflection member is disposed on the other slope portion of the support member.
The lighting device according to any one of claims 3 to 7, wherein the support member includes an electrical wiring that electrically connects the light source and the main substrate.
A plurality of the light sources arranged side by side on one surface of the main substrate;
A plurality of the reflecting members provided corresponding to each of the plurality of light sources,
The plurality of light sources and the plurality of reflecting members are arranged so that light emitted from the plurality of light sources is directed in the same direction. The lighting device described.
A plurality of the light sources arranged side by side on one surface of the main substrate;
A plurality of the reflecting members provided corresponding to each of the plurality of light sources,
The plurality of light sources and the plurality of reflecting members are arranged such that light emitted from the plurality of light sources faces outward from one side in an arrangement region of the plurality of light sources. The lighting device according to any one of claims 7 to 7.
A plurality of the light sources arranged side by side on one surface of the main substrate;
A plurality of the reflecting members provided corresponding to each of the plurality of light sources,
The plurality of light sources and the plurality of reflecting members are arranged so that light emitted from the plurality of light sources draws a plurality of polygonal shapes. The lighting device according to item.
A display device comprising the illumination device according to any one of claims 1 to 7.