JP2013246988A - Lighting device and display device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a lighting device capable of fixing a reflective member and irradiating light to an irradiated body to make its luminance uniform in a surface direction of the irradiated body, and a display device having the lighting device.SOLUTION: A backlight unit 1 includes a frame member 13, a printed board 12 arranged on the frame member 13, a plurality of light-emitting parts 111 arranged on the printed board 12, reflecting members 118 arranged in the surrounding of the light-emitting parts 111 and having primary reflecting parts 1181 and auxiliary reflecting parts 1182, and first fixing members 101 having inclined parts 1011 being the inclined parts 1011 preventing the reflecting members 118 from separating from the frame member 13 and reflecting light emitted from the light-emitting parts 111, and shaft bodies 1012 connected to the inclined parts 1011 and fixed on the frame member 13.

Description

  The present invention relates to an illumination device that irradiates light on a back surface of a display panel, and a display device including the illumination device.

In the display panel, liquid crystal is sealed between two transparent substrates, and when a voltage is applied, the orientation of the liquid crystal molecules is changed and the light transmittance is changed to optically display a predetermined image or the like. Is done. In this display panel, since the liquid crystal itself is not a light emitter, for example, a cold cathode tube (CCFL) and a light emitting diode (LED: Light Emitting) are provided on the back side of the transmissive display panel.
A backlight unit that emits light using a diode as a light source is provided.

  In the backlight unit, light sources such as cold-cathode tubes and LEDs are arranged on the bottom surface to emit light, and light sources such as cold-cathode tubes and LEDs are arranged on the edge of a transparent plate called a light guide plate. There is an edge light type that emits light to the front surface by dot printing or pattern shape provided on the back surface through light from the light plate edge.

  LEDs have excellent characteristics such as low power consumption, long life, and reduced environmental impact by not using mercury, but they are expensive in price, and until the blue LED is invented, the white LED is The absence of the light source and the strong directivity led to a delay in the use of the backlight unit as a light source. However, in recent years, high color rendering high-intensity white LEDs have been rapidly spreading for lighting applications, and the LEDs have become cheaper. Accordingly, as a light source of a backlight unit, there has been a transition from a cold cathode tube to an LED. Progressing.

  Since the LED has strong directivity, the edge light type is more effective than the direct type from the viewpoint of irradiating light so that the luminance of the surface of the display panel is uniform in the surface direction. However, the edge light type backlight unit has a problem that heat generated by the light source is concentrated due to the light source being concentrated on the edge portion of the light guide plate, and the bezel portion of the display panel is enlarged. Arise. Furthermore, the edge light type backlight unit has a great restriction on partial dimming control (local dimming), which is attracting attention as a control method capable of improving the quality and power saving of a display image. There is a problem that it is not possible to control a small divided area where high quality and power saving can be achieved.

  Therefore, in a direct-type backlight unit that is advantageous for partial dimming control, even when an LED with strong directivity is used as the light source, light is irradiated onto the display panel so that the luminance is uniform. There are ongoing studies of possible ways to do this.

  For example, Patent Document 1 discloses a light emitting element, a light guide reflector that guides light emitted from the light emitting element while reflecting the light emitted in a direction orthogonal to the optical axis, and the light emitting element. A light source unit including a vertically extending reflecting member and a frame for supporting them is described. In the light source unit described in Patent Document 1, the light emitted from the light emitting element is reflected by the reflecting member, and the luminance of the display panel is made uniform. This reflective member is affixed on the frame with an adhesive.

  Patent Document 2 describes a backlight unit in which a reflecting member for reflecting light emitted from a light emitting element is fixed to a frame with rivets. In the backlight unit described in Patent Document 2, a rivet is provided adjacent to the light emitting element.

JP 2010-238420 A JP 2011-34041 A

  The light source unit described in Patent Document 1 has a problem that the reflecting member is peeled off from the frame due to heat generated by the light emitting element. The backlight unit described in Patent Document 2 has a problem that a rivet having a low reflectance exists on the reflecting member, so that light is absorbed or diffused by the rivet and the amount of light applied to the display panel becomes uneven. is there.

  The present invention solves such problems, and irradiates the irradiated body with light so that the reflecting member can be fixed and the luminance in the surface direction of the irradiated body is uniform. An object of the present invention is to provide a lighting device that can perform the above-described operation and a display device including the lighting device.

The present invention is a plurality of light emitting units arranged in alignment, a plurality of light emitting units for emitting light,
A reflecting member provided around each light emitting unit and reflecting light emitted from the light emitting unit toward an irradiated body,
A main reflecting portion that extends in a direction perpendicular to the optical axis of the light emitting portion and whose outer shape when viewed in the optical axis direction is a polygonal shape;
A reflective member having a sub-reflective portion that is connected to a corner portion of the main reflective portion and extends at an angle with respect to the main reflective portion;
A support member for supporting the reflection member;
A fixing member for fixing the reflecting member to the support member;
The light to be irradiated is emitted from the at least one light emitting part, extending in an inclined manner with respect to a main reflecting part of a reflecting member provided around at least one light emitting part among the plurality of light emitting parts. An inclined portion that is reflected toward the at least one light emitting portion, and comes into contact with or close to a side portion of the main reflecting portion of the reflecting member provided around the at least one light emitting portion so that the main reflecting portion is separated from the support member. An inclined part to prevent
An illumination device comprising: a fixing member provided integrally with the inclined portion and having a fixing portion fixed to the support member.

  In the invention, it is preferable that the inclined portion is higher in height in the optical axis direction than the sub-reflecting portion or has a larger inclination angle with respect to the main reflecting portion.

  In the invention, it is preferable that the inclined portion is provided in contact with or close to a central portion of the side portion in a direction parallel to the side of the side portion.

  In the invention, it is preferable that the reflection member includes a position shift suppression unit that suppresses a position shift of the inclined portion.

  Further, the invention is characterized in that the inclined portion is provided with a gap with respect to the sub-reflecting portion in a direction parallel to the side of the side portion.

Further, in the present invention, the misregistration suppressing portion is a convex portion protruding toward the irradiated body,
The convex portion is an inclined reflecting surface that extends obliquely with respect to a main reflecting portion of a reflecting member provided around the at least one light emitting portion, and emits light emitted from the at least one light emitting portion. An inclined reflecting surface that reflects toward the irradiated object;
The inclined reflecting surface is provided between the inclined portion and the sub-reflecting portion in a direction parallel to the side of the side portion.

  In the invention, it is preferable that the inclined portion is provided such that an end portion on the side of the sub-reflecting portion in a direction parallel to the side of the side portion overlaps the sub-reflecting portion in the optical axis direction. And

According to the present invention, the reflecting member includes a main reflecting portion of a reflecting member provided around the at least one light emitting portion, and a main reflecting portion provided around the other light emitting portion adjacent to the main reflecting portion. Having a connecting part to connect,
When the connection part is viewed in the optical axis direction, a hole is formed in the center part,
The support member is formed with a hole facing the hole of the connecting portion,
The fixing portion is a shaft body that extends in the optical axis direction and is inserted through the hole of the connecting portion and the hole of the support member.

The present invention also includes a substrate on which the light emitting unit is mounted,
The substrate is formed with a hole facing the hole of the connecting portion,
The shaft body is inserted through a hole in the substrate.

  According to the present invention, the sub-reflecting portion is inclined so as to be separated from the main reflecting portion in the optical axis direction as it is separated from the main reflecting portion in one direction perpendicular to the optical axis direction. It is characterized by.

  The present invention is characterized in that the total reflectance of the inclined portion is substantially equal to the total reflectance of the sub-reflecting portion.

The present invention also provides a display panel,
A display device comprising: the illumination device that irradiates light to the display panel.

The present invention also includes a diffusion plate provided between the display panel and the light emitting unit,
The fixing member is a support portion provided integrally with the fixing portion, and has a support portion that supports the diffusion plate.

  According to the present invention, the reflecting member can be fixed to the support member by the fixing member, and the light emitted from the light emitting portion can be reflected toward the irradiated object by the inclined portion of the fixing member. Thus, the irradiated object can be irradiated with light so that the luminance in the surface direction of the irradiated object is uniform.

  Further, according to the present invention, the inclined portion is higher in height than the sub-reflecting portion in the optical axis direction, or the inclination angle with respect to the main reflecting portion is larger than that of the sub-reflecting portion. When the reflecting member is fixed to the support member by a fixing member that is a member different from the reflecting member, the amount of light irradiated to the irradiated object may be reduced in the vicinity of the portion where the boundary of the member exists, Since the height of the part is high or the inclination angle is large, the amount of irradiation light is supplemented, and a decrease in the amount of irradiation light can be suppressed.

  According to the invention, the inclined portion is provided in contact with or close to the central portion of the side portion in a direction parallel to the side of the side portion. As described above, the amount of irradiation light decreases at the portion where the boundary between the reflecting member and the fixing member exists. Therefore, if this boundary is located closer to the corner portion of the main reflecting portion, the irradiation of the corner portion where the amount of irradiation light tends to be insufficient. Although the amount of light is reduced, the inclined part is provided in contact with or close to the center part of the side part, so that this boundary is located closer to the center of the side part, so that the irradiation in the corner part is performed. A decrease in the amount of light can be prevented.

  According to the invention, the reflecting member has a misregistration suppressing portion that suppresses misalignment of the inclined portion. By suppressing the position shift of the inclined portion by the position shift suppression unit, it is possible to suppress the occurrence of uneven illuminance of the irradiated object.

  According to the invention, the inclined portion is provided with a gap with respect to the sub-reflecting portion in a direction parallel to the side of the side portion that comes into contact with or is close to. Accordingly, when the reflecting member is fixed by the fixing member, the fixing member and the reflecting member do not easily interfere with each other, and the fixing becomes easy. In addition, since the inclined portion does not come into contact with the sub-reflecting portion, the reflecting member is not hindered from extending when the reflecting member tries to extend in the main surface direction of the main reflecting portion due to heat generated by the light emitting portion. It is possible to suppress the occurrence of wrinkles.

  Further, according to the present invention, the inclined portion does not contact the sub-reflecting portion, and the inclined reflecting surface of the convex portion is provided between the inclined portion and the sub-reflecting portion. The light can be reflected toward. Therefore, it is possible to suppress a decrease in the amount of irradiation light due to the provision of the fixing member.

  According to the invention, the inclined portion is provided such that the end on the side of the sub-reflecting portion in the direction parallel to the side of the side portion that comes into contact or close to the sub-reflecting portion overlaps the sub-reflecting portion in the optical axis direction. . Accordingly, the reflecting member can be fixed to the support member by the fixing member, and the light emitted from the light emitting unit can be reflected toward the irradiated object by the fixing member. Misalignment can also be suppressed.

  According to the invention, the shaft member is inserted into the hole of the connecting portion and the hole of the support member, whereby the fixing member is fixed to the support member, and as a result, the support member and the reflecting member are fixed.

  According to the invention, the shaft body is inserted into the hole of the substrate. Accordingly, the substrate can be fixed to the support member together with the reflecting member by the fixing member.

  Further, according to the present invention, the sub-reflecting portion is inclined so as to be separated from the main reflecting portion in the optical axis direction as it is separated from the main reflecting portion in one direction out of the directions perpendicular to the optical axis direction. Therefore, the light emitted from the light emitting portion can be spread and irradiated in the direction perpendicular to the optical axis direction by the sub-reflecting portion.

  According to the invention, the total reflectance of the inclined portion is substantially equal to the total reflectance of the sub-reflecting portion. Thereby, the luminance in the surface direction of the irradiated object can be made more uniform.

  Moreover, according to this invention, while being able to fix a reflection member, the brightness | luminance in the surface direction of a to-be-irradiated body can be equalize | homogenized.

  According to the invention, the diffusion plate can be prevented from being bent by supporting the diffusion plate by the support portion of the fixing member.

1 is an exploded view showing a liquid crystal display device 100. FIG. It is a figure which shows a mode when the diffusing plate 3 and the backlight unit 1 are planarly viewed from the liquid crystal panel 2 side. 2 is a plan view of a printed circuit board 12. FIG. It is a figure which shows the positional relationship of the LED chip 111a supported by the base 111b, and the lens 112. FIG. It is a figure which shows the base 111b and LED chip 111a. It is a figure which shows the LED chip 111a and the base 111b which are mounted in the printed circuit board 12. It is a figure which shows typically the optical path of the light radiate | emitted from LED chip 111a. 4 is a plan view of four reflecting members 118. FIG. FIG. 6 is a perspective view of one reflecting member 118. It is sectional drawing of the liquid crystal display device 100 when it cut | disconnects by the line AA shown in FIG. It is a top view of the several reflection member 118 integrally molded. It is a figure which shows a mode that the two main reflection parts 1181 are connected by the 1st connection part 1183. FIG. 3 is a perspective view of a first fixing member 101. FIG. 4 is a perspective view of a second fixing member 102. FIG. It is the top view and bottom view of the retaining member 103 before the 1st fixing member 101 or the 2nd fixing member 102 is inserted. It is sectional drawing of the retaining member 103 when it cut | disconnects by the line BB shown in FIG. FIG. 12 is a diagram illustrating a state when the integrated reflective member 18 illustrated in FIG. 11 is fixed to the bottom 131 of the frame member 13 by the first fixing member 101 and the second fixing member 102. FIG. 18 is a cross-sectional view of the integrated reflective member 18 and the first fixing member 101 when cut along a line CC shown in FIG. 17. It is a figure which shows the example which enlarged the inclination angle of the inclination parts 1011 and 1021. FIG. It is a figure which shows the position shift suppression part in other embodiment of this invention.

It is a figure which shows the position shift suppression part in other embodiment of this invention. It is a figure which shows the example in which the inclination parts 1011 and 1021 overlap with the sub-reflection part 1182. It is a figure which shows the example in which the 1st, 2nd fixing member 101,102 was provided every two or more.

  Below, the liquid crystal display device 100 provided with the backlight unit 1 which is embodiment of this invention is demonstrated. FIG. 1 is an exploded view of the liquid crystal display device 100. The liquid crystal display device 100 includes a backlight unit 1, a liquid crystal panel 2, and a diffusion plate 3.

  The liquid crystal panel 2 includes two substrates and is configured in a rectangular flat plate shape. The liquid crystal panel 2 is supported by the side wall portion 132 of the frame member 13 so that the bottom surface 131a of the bottom portion 131 of the frame member 13 included in the backlight unit 1 and the main surface of the liquid crystal panel 2 are substantially parallel. The liquid crystal panel 2 includes a switching element such as a thin film transistor (TFT), and liquid crystal is injected into a gap between the two substrates. The two substrates are provided with a driver (source driver) for controlling driving of pixels, various elements, and wiring. The liquid crystal panel 2 configured as described above displays an image on the display screen 2a which is one of the main surfaces when irradiated with light from the backlight unit 1.

  The diffusion plate 3 is a rectangular flat plate member. The diffusion plate 3 is supported between the liquid crystal panel 2 and the backlight unit 1 by the side wall portion 132 of the frame member 13 so that the main surface of the liquid crystal panel 2 and the main surface of the diffusion plate 3 are parallel to each other. . The diffusing plate 3 prevents the luminance of the display screen 2a from being locally biased by diffusing the light emitted from the backlight unit 1 in the surface direction of the diffusing plate 3.

  As another embodiment of the present invention, a prism sheet may be disposed between the liquid crystal panel 2 and the diffusion plate 3. The prism sheet converts the traveling direction of the light that has reached through the diffusion plate 3 into the thickness direction of the liquid crystal panel 2 to improve the luminance of the display screen 2a.

  FIG. 2 shows a state when the diffusing plate 3 and the backlight unit 1 are viewed in plan from the liquid crystal panel 2 side. The backlight unit 1 is a direct illumination device that irradiates light from the back side, which is the main surface opposite to the display screen 2a, with respect to the liquid crystal panel 2. The backlight unit 1 includes a plurality of light emitting devices 11 each having a light emitting unit 111 and a reflecting member 118, a plurality of printed circuit boards 12, and a frame member 13.

  The frame member 13 includes a flat bottom 131 that faces the liquid crystal panel 2 with a predetermined interval, and four side walls 132 that are connected to the bottom 131 and rise from the bottom 131. The bottom 131 has a rectangular shape when viewed in the thickness direction, and is slightly larger than the liquid crystal panel 2. The side wall part 132 rises toward the liquid crystal panel 2 from two end parts that form a rectangular short side and two end parts that form a long side when viewed in the thickness direction in the bottom part 131. It is formed. The thickness of the frame member 13 is, for example, 0.8 mm to 1.0 mm.

  FIG. 3 shows a plan view of the printed circuit board 12. The printed circuit board 12 is fixed to the bottom surface 131 a of the bottom 131 of the frame member 13. A plurality of light emitting units 111 are provided on the mounting surface 12 a of the printed circuit board 12. The printed circuit board 12 is a substantially rectangular plate-like member, and has a width direction length (width) of, for example, 10 mm and a thickness direction length (thickness) of, for example, 0.8 mm. The plurality of printed circuit boards 12 are provided in parallel in the width direction, for example, separated by 30 mm.

  The printed circuit board 12 is, for example, a substrate made of glass epoxy having a conductive pattern printed on both sides. The printed circuit board 12 extends to the side wall 132 of the frame member 13, and a connector 132 a provided on the side wall 132 for supplying power to the printed circuit board 12 is connected to the conductive pattern of the printed circuit board 12. . Each light emitting unit 111 on the printed circuit board 12 is supplied with power through the connector 132a and the conductive pattern.

  The printed circuit board 12 is formed with positioning round holes 12b, positioning long holes 12c, and a plurality of fixing holes 12d. Projection portions (not shown) formed on the bottom surface 131a of the bottom portion 131 of the frame member 13 are inserted into the positioning round holes 12b and the positioning long holes 12c, respectively. Further, as shown in FIG. 10 to be described later, the first fixing member 101 or the second fixing member 102 is inserted into the fixing hole 12d, and the first fixing member 101 or the second fixing member 102 is retained. It is fixed in a circular hole (hole 1311 shown in FIG. 10) formed in the bottom 131 of the frame member 13 via the member 103. In this way, the printed circuit board 12 is fixed to the bottom 131 of the frame member 13.

As shown in FIG. 2, the plurality of light emitting devices 11 are arranged in a matrix. Each light emitting device 11 is formed in a square shape when viewed in a direction perpendicular to the bottom surface 131a of the bottom 131 of the frame member 13 (X direction), and the length of one side of this square is, for example, 55 mm. Each light-emitting device 11 is designed so that the amount of light in the area facing the square in the liquid crystal panel 2 is, for example, 6000 cd / m ² .

  The light emitting device 11 is provided around the light emitting unit 111 that emits light toward the liquid crystal panel 2 that is an object to be irradiated, and reflects the light emitted from the light emitting unit 111 toward the liquid crystal panel 2. And a reflecting member 118. The reflection member 118 is supported by the bottom 131 of the frame member 13 via the printed circuit board 12, extends in a direction perpendicular to the X direction, and is a flat plate having an outer shape when viewed in the X direction. It includes a main reflection part 1181 and a sub reflection part 1182 having a main surface that is connected to the main reflection part 1181 and extends at an inclination with respect to the main surface of the main reflection part 1181.

  The light emitting unit 111 includes a light emitting diode (LED) chip 111a, a base 111b that supports the LED chip 111a, and a lens 112. FIG. 4 is a diagram showing a positional relationship between the LED chip 111a supported by the base 111b and the lens 112. As shown in FIG. The base 111b is a member for supporting the LED chip 111a. The base 111b is formed in a square shape when the support surface for supporting the LED chip 111a is viewed in plan in the X direction, and the length L1 of one side of the square is, for example, 3 mm. Moreover, the X direction length of the base 111b is 1 mm, for example.

  FIG. 5 is a view showing the base 111b and the LED chip 111a, FIG. 5 (a) is a plan view, FIG. 5 (b) is a front view, and FIG. 5 (c) is a bottom view. . The base 111b includes a base main body 111g made of ceramic, resin, and the like, and two electrodes 111c provided on the base main body 111g. The LED chip 111a is a base main body that serves as a support surface of the base 111b. It is fixed to the central portion of the upper surface of 111g with an adhesive member 111f. The two electrodes 111c are spaced apart from each other, and are respectively provided over the top surface, the side surface, and the bottom surface of the base body 111g.

  The two electrodes 111c and two terminals (not shown) of the LED chip 111a are connected by two bonding wires 111d, respectively. The LED chip 111a and the bonding wire 111d are sealed with a transparent resin 111e such as silicon resin.

  FIG. 6 shows the LED chip 111a and the base 111b mounted on the printed circuit board 12. The LED chip 111a is mounted on the printed circuit board 12 via the base 111b, and emits light in a direction from the printed circuit board 12 to the liquid crystal panel 2. The direction in which the optical axis S of the LED chip 111a extends (the optical axis S direction) is the X direction. The LED chip 111a is located at the center of the base 111b when the light emitting device 11 is viewed in plan in the X direction. In the plurality of light emitting devices 11, the light emission control by the LED chips 111 a can be controlled independently of each other. Thereby, the backlight unit 1 can perform partial dimming control (local dimming).

  When mounting the LED chip 111a and the base 111b on the printed circuit board 12, first, solder is respectively applied to the two connection terminal portions 121 of the conductive pattern provided in the printed circuit board 12, and the base body is attached to the solder. The base 111b and the LED chip 111a fixed to the base 111b are placed on the printed circuit board 12 by, for example, an automatic machine (not shown) so that the two electrodes 111c provided on the bottom surface of 111g match each other. The printed circuit board 12 on which the base 111b and the LED chip 111a fixed to the base 111b are placed is sent to a reflow bath that irradiates infrared rays, and the solder is heated to about 260 ° C., and the base 111b, the printed circuit board 12, Is soldered.

  The lens 112 shown in FIG. 4 is provided in contact with the base 111b so as to cover the LED chip 111a and the base 111b that supports the LED chip 111a, and at least a part of the light emitted from the LED chip 111a, The light is reflected or refracted in a plurality of directions intersecting the optical axis S of the LED chip 111a. The lens 112 is a transparent lens, and is made of, for example, silicon resin or acrylic resin.

  In the lens 112, an upper surface 112a that is a surface facing the liquid crystal panel 2 is formed to be curved with a depression at the center. Moreover, the side surface 112b is formed in the side surface shape of the cylinder which makes the optical axis S direction of the LED chip 111a an axial direction.

  The lens 112 is formed to be rotationally symmetric about the optical axis S. In the lens 112, a diameter L2 of a cross section orthogonal to the optical axis S is, for example, 10 mm. The lens 112 extends outward with respect to the base 111b. That is, the lens 112 is larger than the base 111b in the direction perpendicular to the optical axis S of the LED chip 111a (the diameter L2 of the lens 112 is larger than the length L1 of one side of the support surface of the base 111b). As described above, the lens 112 is provided so as to extend outward with respect to the base 111b, so that the light emitted from the LED chip 111a can be diffused by the lens 112 over a wide range. The height H1 of the lens 112 is 2 mm, for example, and is smaller than the diameter L2. That is, the maximum length of the lens 112 in the direction perpendicular to the optical axis S of the LED chip 111a is larger than the height H1.

  As described above, the diameter L2 is made larger than the height H1 in order to make the backlight unit 1 thinner and to uniformly irradiate the liquid crystal panel 2 with light. In order to reduce the thickness of the backlight unit 1, it is necessary to reduce the height H1 of the lens 112, that is, to make the lens 112 as thin as possible. However, if the lens 112 is made thinner, uneven illuminance is likely to occur on the back surface of the liquid crystal panel 2, and as a result, uneven brightness is likely to occur on the display screen 2 a of the liquid crystal panel 2. In particular, when the distance between the adjacent LED chips 111a is long, the portion of the back surface of the liquid crystal panel 2 between the adjacent LED chips 111a is far away from the two LED chips 111a, and the amount of irradiation light decreases. Therefore, illuminance unevenness (luminance unevenness) easily occurs between this part and the part facing the LED chip 111a. In order to irradiate the light emitted from the LED chip 111a to a region far from the LED chip 111a via the lens 112, it is necessary to increase the diameter L2 of the lens 112 to some extent. In this embodiment, the lens 112 By making the diameter L2 of the light source larger than the height H1, the backlight unit 1 can be made thinner and the liquid crystal panel 2 can be uniformly irradiated with light.

  If the diameter L2 of the lens 112 is made smaller than the height H1 of the lens 112, it is difficult not only to make the backlight unit 1 thinner and uniformly irradiated, but also to adjust the lens 112 in accordance with the LED chip 111a. In insert molding to form, the subject that a balance tends to worsen arises. Further, when soldering the light emitting unit 111 composed of the LED chip 111a and the base 111b and the insert-molded lens 112 to the printed circuit board 12, the balance is easily lost, and there is a problem in assembly.

  An upper surface 112a of the lens 112 faces the LED chip 111a and is parallel to the main surface of the diffusion plate 3, a first curved portion 1122 surrounding the central portion 1121, and a second surrounding the first curved portion. A curved portion 1123. On the surface of the lens 112, the central portion 1121, the second curved portion 1123, and the side surface 112 b of the upper surface 112 a become a transmission region that transmits the light emitted from the LED chip 111 a and reaching the inside of the lens 112. Further, the first curved portion 1122 of the upper surface 112a becomes a reflection region that reflects the light emitted from the LED chip 111a and reaching through the inside of the lens 112 toward the side surface 112b.

  In the present embodiment, the lens 112 has a reflection portion 119 that reflects light on the entire bottom surface thereof. The reflection portion 119 can be formed by attaching a silver or aluminum sheet or performing aluminum vapor deposition. The thickness of the reflecting part 119 is, for example, 50 μm, and the reflectance (total reflectance) for visible light emitted from the LED chip 111a is 98% or more. In addition, aluminum vapor deposition is performed by heating aluminum in a vacuumed container and adhering it to the bottom surface of the lens 112 which is a vapor deposition object.

  The central portion 1121 of the upper surface 112a of the lens 112 is formed so that the center of the central portion 1121 (that is, the optical axis of the lens 112) is located on the optical axis S of the LED chip 111a at the center of the upper surface 112a. The central portion 1121 of the upper surface 112a is parallel to the light emitting surface of the LED chip 111a and is formed in a circular shape, and the circular diameter L3 is, for example, 1 mm. As another embodiment of the present invention, the shape of the central portion 1121 is a side surface of a virtual cone having a circular bottom surface and protruding toward the LED chip 111a instead of the circular shape. It may be.

  A central portion 1121 of the upper surface 112a of the lens 112 is formed to irradiate light to a region of the diffusing plate 3 facing the central portion 1121 and a region in the vicinity thereof. Since the central portion 1121 is a portion facing the LED chip 111a, the region facing the central portion 1121 when most of the light emitted from the LED chip 111a reaches the central portion 1121 and most of the light is transmitted as it is. And the illuminance of the area in the vicinity thereof is significantly increased. Therefore, it is preferable that the shape of the central portion 1121 is a side surface of the cone. In the case of the side surface of the cone, most of the light is reflected by the central portion 1121 and less light passes through the central portion 1121, so that the illuminance of the region facing the central portion 1121 and the region in the vicinity thereof can be suppressed. it can.

  The first curved portion 1122 of the upper surface 112a of the lens 112 is an annular curved surface that surrounds the outer peripheral edge of the central portion 1121 and continues to the outer peripheral edge, and this curved surface is centered on the optical axis S of the LED chip 111a. As it goes outward, it extends to one side in the optical axis S direction (direction toward the liquid crystal panel 2), and is curved so as to be convex inward and one side in the optical axis S direction. Here, the outer peripheral edge portion is a portion that is the outermost portion around the optical axis S when viewed in plan in the direction of the optical axis S, and is a portion that makes one round around the optical axis S. In order to make the first curved portion 1122 a reflective region, the shape of the curved surface is designed so that the light emitted from the LED chip 111a is totally reflected.

  More specifically, of the light emitted from the LED chip 111a, the light that has reached the first curved portion 1122 of the upper surface 112a of the lens 112 is totally reflected by the first curved portion 1122 and then transmitted through the side surface 112b of the lens. And toward the main reflecting portion 1181 of the reflecting member 118. The light that reaches the main reflecting portion 1181 is diffused by the main reflecting portion 1181, and a part of the diffused light is irradiated to a region facing the main reflecting portion 1181 in the diffusion plate 3. Further, another part of the diffused light is directed to the sub-reflecting part 1182 of the reflecting member 118 and diffused by the sub-reflecting part 1182 and the first fixing member 101 and the second fixing member 102 described later, and the diffused light is diffused. In the plate 3, the regions facing the sub-reflecting portion 1182, the first fixing member 101, and the second fixing member 102 are respectively irradiated. In this way, it is possible to increase the amount of light applied to the region not facing the LED chip 111a.

  The first curved portion 1122 of the upper surface 112a of the lens 112 is formed so that the incident angle of the light emitted from the LED chip 111a is greater than or equal to the critical angle φ in order to totally reflect the light emitted from the LED chip 111a. Is done. For example, when the material of the lens 112 is an acrylic resin, the refractive index of the acrylic resin is “1.49” and the refractive index of air is “1”, and thus sin φ = 1.1 / 49. From this equation, the critical angle φ is 42.1 °, and the first curved portion 1122 is formed in a shape with an incident angle of 42.1 ° or more. For example, when the lens 112 is made of silicon resin, the refractive index of silicon resin is “1.43” and the refractive index of air is “1”, so sin φ = 1 / 1.43. . From this equation, the critical angle φ is 44.4 °, and the first curved portion 1122 is formed in a shape with an incident angle of 44.4 ° or more.

  The second curved portion 1123 of the upper surface 112a of the lens 112 is an annular curved surface that surrounds the outer peripheral edge portion of the first curved portion 1122 and continues to the outer peripheral edge portion, and this curved surface is the optical axis S of the LED chip 111a. As it goes outward, the optical axis S extends in the other direction (the direction away from the liquid crystal panel 2), and is curved so as to protrude outward and in the optical axis S direction.

  Of the light emitted from the LED chip 111a, the light that has reached the second curved portion 1123 of the upper surface 112a of the lens 112 is refracted in the direction toward the light emitting unit 111 when passing through the second curved portion 1123, It goes to the diffusing plate 3 and the reflecting member 118. The light reaching the reflection member 118 is diffused and travels toward the diffusion plate 3. Thus, the light traveling toward the diffusion plate 3 by the second curved portion 1123 is mainly in a region different from the region irradiated with light by the central portion 1121 and the first curved portion 1122 of the upper surface 112a of the lens 112 in the diffusion plate 3. This compensates for the amount of light. Since the second curved portion 1123 needs to transmit light, for example, the second curved portion 1123 is formed in a shape with an incident angle of less than 42.1 ° so as not to totally reflect the light emitted from the LED chip 111a.

  Thus, the lens 112 has a first curved portion 1122 that totally reflects the light emitted from the LED chip 111a toward the side surface 112b of the lens 112 at the outer peripheral edge of the central portion 1121 of the upper surface 112a. A second curved portion 1123 that refracts the light emitted from the LED chip 111a is formed at the outer peripheral edge of the first curved portion 1122. The LED chip 111a generally has high directivity, the amount of light near the optical axis S is extremely large, and the amount of light decreases as the light emission angle with respect to the optical axis S increases. Therefore, in order to increase the amount of light emitted to the region relatively far from the optical axis S of the LED chip 111a (that is, the optical axis of the lens 112), light having a large emission angle with respect to the optical axis S is directed to this region. Instead, it is necessary to direct light having a small emission angle to this region. In the present embodiment, as described above, the first curved portion 1122 that totally reflects the light toward the region is formed around the central portion 1121 through which the optical axis S passes. The amount of light irradiated to the can be increased. On the other hand, if the second curved portion 1123 is formed adjacent to the periphery of the central portion 1121, and the first curved portion 1122 is formed adjacent to the second curved portion 1123, The emission angle of the light traveling toward the first curved portion 1122 with respect to the optical axis S increases, and as a result, the amount of light that is totally reflected by the first curved portion 1122 and applied to the region is reduced.

  FIG. 7 is a diagram schematically showing an optical path of light emitted from the LED chip 111a. The light emitted from the LED chip 111 a enters the lens 112, and is reflected and refracted by the lens 112. Specifically, of the light incident on the lens 112, the light that has reached the central portion 1121 of the upper surface 112a of the lens 112 is emitted toward the liquid crystal panel 2 in the direction of the arrow A1 or the like, and the first curve of the upper surface 112a. The light reaching the portion 1122 is totally reflected and emitted from the side surface 112b in the direction of the arrow A2, and the light reaching the second curved portion 1123 of the upper surface 112a is refracted and directed toward the liquid crystal panel 2 as indicated by the arrow A3. It is emitted in the direction.

  In the present embodiment, the LED chip 111a and the lens 112 are such that the center of the lens 112 (that is, the optical axis of the lens 112) is positioned on the optical axis S of the LED chip 111a, and the lens 112 is in contact with the LED chip 111a. In addition, it is formed in advance with high accuracy. As described above, the LED chip 111a and the lens 112 can be formed by previously aligning them by insert molding or fitting the LED chip 111a supported by the base 111b to the lens 112 molded into a predetermined shape. The method of combining can be mentioned. In the present embodiment, the LED chip 111a and the lens 112 are formed by being previously aligned by insert molding.

  When insert molding is performed, an upper surface mold and a lower surface mold are roughly used. Molding is performed by injecting a resin, which is a raw material of the lens 112, from a resin inlet into a space formed when the upper surface mold and the lower surface mold are combined. In addition, in a state where the LED chip 111a supported by the base 111b is held in the space formed when the upper surface mold and the lower surface mold are combined, the resin as the raw material of the lens 112 is injected from the resin injection port. You may make it shape | mold by doing. Thus, by forming the LED chip 111a and the lens 112 by insert molding, it is possible to align the lens 112 with high accuracy so that the lens 112 contacts the LED chip 111a. Accordingly, the backlight unit 1 can accurately reflect and refract the light emitted from the LED chip 111a by the lens 112 in contact with the LED chip 111a. Therefore, the diffusion unit shown in FIG. Even in the thinned liquid crystal display device 100 having a small distance H3 (H3 is 6 mm, for example) from the board 3 to the printed circuit board 12, the liquid crystal panel 2 is irradiated with light so that the luminance is uniform in the surface direction. Can do.

  Next, the reflecting member 118 will be described. FIG. 8 is a plan view of the four reflecting members 118. FIG. 8 corresponds to the four reflecting members 118 in the lower right corner in FIG. In addition, since the square shown with the dashed-two dotted line in FIG. 8 is a figure which does not appear when the some reflection member 118 is integrally molded, it is shown with the dashed-two dotted line. The same applies to FIGS. 11 and 17 described later. FIG. 9 is a perspective view of one reflecting member 118. FIG. 10 is a cross-sectional view of the liquid crystal display device 100 taken along line AA shown in FIG.

  The reflecting member 118 is a member having a high reflectance, ideally 100%, with respect to the light emitted from the LED chip 111a. In the present embodiment, the reflecting member 118 is white and has a total reflectance of 95% to 98% with respect to the light emitted from the LED chip 111a. The reflectance of the material constituting the reflecting member 118 can be measured according to JIS K 7375.

  The reflecting member 118 is made of high-brightness PET (Polyethylene Terephthalate), aluminum, or the like. High-brightness PET is foamable PET containing a fluorescent agent, and examples thereof include E60V (trade name) manufactured by Toray Industries, Inc. The reflection member 118 has a polygonal shape, for example, a substantially square shape, when viewed in plan in the X direction. When the length of one side of the square shape is 55 mm, the reflection member 118 is located between the centers of adjacent reflection members 118. The interval is, for example, 55 mm to 58 mm.

  The main reflecting portion 1181 of the reflecting member 118 is a flat plate member having a thickness of 0.1 mm to 0.5 mm, and the outer shape when viewed in a plane in the X direction is a polygonal shape, for example, a square shape. The main reflecting portion 1181 is provided on the printed circuit board 12 so as to extend in a direction perpendicular to the optical axis S of the LED chip 111a, and each side of the square when viewed in plan in the X direction has a plurality of LED chips 111a. Are formed so as to be parallel to the arrangement direction (the row direction or the column direction in the matrix arrangement).

  The main reflecting portion 1181 is provided with a circular opening at the center when viewed in plan in the X direction. The diameter of the circular opening is 10 mm to 13 mm, which is about the same as the diameter L2 of the lens 112 covering the LED chip 111a, and the light emitting unit 111 including the lens 112 is mounted on the printed circuit board 12. After that, when the reflecting member 118 is installed on the printed circuit board 12, the light emitting unit 111 is inserted into the opening.

  The sub-reflecting portions 1182 of the reflecting member 118 are provided to be connected to the four corner portions 1181a of the main reflecting portion 1181, respectively. Here, the corner portion 1181a of the main reflection portion 1181 is a portion within a predetermined distance from the corner point of the square main reflection portion 1181 when the main reflection portion 1181 is viewed in plan in the X direction. The predetermined distance is, for example, 2% to 20% of the length of one side of the square main reflecting portion 1181. In addition, when the main reflection portion 1181 is viewed in plan in the X direction, a portion excluding the four corner portions 1181a among the portions that become the outer peripheral edge of the square main reflection portion 1181 is referred to as four side portions 1181b. Called. The outer peripheral edge of the square main reflecting portion 1181 is a portion that goes around the optical axis S when viewed in plan in the optical axis S direction (X direction). A portion having a predetermined width that is the outermost side in each direction perpendicular to the axis S. The predetermined width is, for example, a width of 1% to 10% of the length of one side of the square main reflecting portion 1181.

  Each sub-reflecting portion 1182 includes a first inclined piece 1182a connected to a corresponding corner portion 1181a and one of two side portions 1181b adjacent to the corner portion 1181a, a corresponding corner portion 1181a, and the corner portion 1181a. The second inclined piece 1182b is connected to the other of the two adjacent side portions 1181b. Below, the 1st inclination piece 1182a and the 2nd inclination piece 1182b may be called an "inclination piece", without distinguishing.

  The main surfaces of the first inclined piece 1182a and the second inclined piece 1182b of each sub-reflecting portion 1182 face the light emitting portion 111, and the optical axis increases as the distance from the main reflecting portion 1181 increases in the direction perpendicular to the optical axis S direction of the LED chip 111a. In the S direction, it is formed to be inclined and extend away from the printed circuit board 12 toward the diffusion plate 3. In each sub-reflecting part 1182, the first inclined piece 1182 a and the second inclined piece 1182 b connected to different side portions 1181 b of the main reflecting part 1181 are inclined in different inclination directions. However, the inclination angles of the first inclined piece 1182a and the second inclined piece 1182b with respect to the main reflecting portion 1181 are preferably all equal, for example, the inclination angle θ shown in FIG. 10 is 100 °. Note that the inclination angle θ is not limited to 100 °, and can be appropriately set within a range of 90 ° to less than 180 °.

  The height H2 of the sub-reflecting part 1182 is, for example, 1 mm to 5 mm, and is 1.5 mm in this embodiment. Here, the height H2 is the distance in the X direction between the portion of the sub-reflecting portion 1182 that is farthest from the surface of the main reflecting portion 1181 in the X direction and the surface of the main reflecting portion 1181.

  The reflection members 118 configured as described above and provided in each of the plurality of light emitting devices 11 are preferably formed integrally with each other. As a method of integrally forming the plurality of reflecting members 118, when the reflecting member 118 is made of foamable PET, an extrusion molding process can be cited, and when the reflecting member 118 is made of aluminum, A press working can be mentioned. As described above, by integrally forming the reflecting members 118 respectively provided in the plurality of light emitting devices 11, it is possible to improve the accuracy of the arrangement positions of the respective light emitting units 111 with respect to the respective reflecting members 118. As a result, the reflecting members The light can be reflected by 118 so that the luminance of the irradiated object becomes more uniform in the surface direction. Further, by integrally forming the reflection member 118, the number of operations for attaching the reflection member 118 can be reduced during the assembly operation of the backlight unit 1, so that the efficiency of the assembly operation can be improved.

  When the plurality of reflecting members 118 are integrally formed, adjacent sub-reflecting portions 1182 are provided continuously. Further, in the present embodiment, as described below, the reflecting members 118 are connected to each other in a portion other than the sub-reflecting portion 1182.

  FIG. 11 shows a plan view of a plurality of reflecting members 118 that are integrally molded. FIG. 11 corresponds to the four reflecting members 118 in the lower right corner in FIG. As shown in FIG. 11, in the present embodiment, a first connection portion 1183 is provided between two main reflection portions 1181 that are arranged adjacent to each other in a matrix, and the two main reflection portions 1183 provide two main reflection portions. Adjacent side portions 1181b in the reflection unit 1181 are connected to each other. Further, in the present embodiment, among the plurality of reflecting members 118 arranged in a matrix, the second connection is made to the outermost side portion 1181b of the main reflecting portion 1181 arranged on the outermost side of the backlight unit 1. A portion 1184 is provided. The plurality of reflecting members 118 configured integrally with the first and second connecting portions 1183 and 1184 as described above are hereinafter referred to as the integrated reflecting member 18. In FIG. 11, some of the first connecting portions 1183 and the second connecting portions 1184 are omitted.

  FIG. 12 shows a state in which the two main reflecting portions 1181 are connected by the first connecting portion 1183. In FIG. 12, some of the sub-reflecting portions 1182, the first connecting portions 1183, and the second connecting portions 1184 are omitted. As shown in FIGS. 11 and 12, the first connecting portion 1183 is continuous with the central portion in the direction parallel to the sides of the side portions 1181 b of the two main reflecting portions 1181. Further, the first connecting portion 1183 is formed with a circular hole 1183a at the center when viewed in plan in the X direction. A circular hole 1311 shown in FIG. 10 is formed in the bottom 131 of the frame member 13 so as to face the hole 1183a. When the printed circuit board 12 is disposed between the hole 1183a of the first connecting portion 1183 and the hole 1311 of the bottom 131 of the frame member 13, the fixing hole 12d of the printed circuit board 12 faces the hole 1183a and the hole 1311. To do.

  The position where the first connecting portion 1183 is provided may not be the central portion of the side portion 1181b of the main reflecting portion 1181 in the direction parallel to the side, but may be a location close to the corner portion 1181a. The position where the hole 1183a is formed may not be the center of the first connecting portion 1183, but may be a position close to the corner portion 1181a.

  The first connecting portion 1183 can be integrally formed from the same material as the reflecting member 118. The first connecting portion 1183 has two convex portions 11831 and a flat plate portion 11832.

  The flat surface portion 11832 has a rectangular main surface and is continuous with the side portions of the two main reflection portions 1181, and a hole 1183 a is formed at the center. In the present embodiment, the thickness of the flat plate portion 11832 is equal to the thickness of the main reflecting portion 1181, and the surface facing the diffusion plate 3 is in the same plane. The hole 1183a may be formed over the side portion 1181b of the main reflecting portion 1181 that is continuous with the flat plate portion 11832.

  The two convex portions 11831 protrude from the flat plate portion 11832 toward the liquid crystal panel 2 that is the irradiated body. The two convex portions 11831 extend in a direction parallel to the side of the adjacent side portion 1181b of the two main reflecting portions 1181 connected to the flat plate portion 11832, and sandwich the hole 1183a in this direction on the main surface of the flat plate portion 11832. Provided in position. When viewed in plan in the X direction, the convex portion 11831 is located outside the two main reflecting portions 1181 that are continuous with the flat plate portion 11832. The height of the convex portion 11831, that is, the distance in the X direction between the portion of the convex portion 11831 that is farthest from the surface of the main reflecting portion 1181 in the X direction and the surface of the main reflecting portion 1181 is the height of the sub reflecting portion 1182. It is lower than the height H2, and the difference is, for example, 0.5 mm to 3 mm.

  One convex portion 11831 of the two convex portions 11831 is adjacent to the two sub-reflective portions 1182 of the four sub-reflecting portions 1182 that are continuous to the side portion 1181b of the two main reflective portions 1181 that are continuous to the flat plate portion 11832. It continues to. More specifically, one convex portion 11831 continues to two adjacent inclined pieces between the two adjacent sub-reflecting portions 1182. The other convex part 11831 of the two convex parts 11831 is a sub-line connected to one convex part 11831 of the four sub-reflective parts 1182 connected to the side part 1181b of the two main reflective parts 1181 connected to the flat plate part 11832. It is connected to two sub-reflecting parts 1182 different from the reflecting part 1182. More specifically, the other convex portion 11831 is connected to two inclined pieces adjacent to each other between the two sub-reflecting portions 1182.

  Each convex portion 11831 of the first connecting portion 1183 is one side of two inclined pieces that are continuous to each convex portion 11831 in a direction perpendicular to the side of the side portion 1181b of the two main reflecting portions 1181 that are continuous to the flat plate portion 11832. An inclined reflection surface 11831a extending at an inclination with respect to the main reflection portion 1181 is provided on the inclined piece side. The inclination direction of the inclined reflecting surface 11831a is the same as the inclination direction of the main surface of the inclined piece on one side. The inclination angle of the inclined reflecting surface 11831a is preferably equal to or larger than the inclination angle of the main surface of the one inclined piece, and is about 10 ° larger in this embodiment. In addition, each convex portion 11831 of the first connecting portion 1183 is one of two inclined pieces that are continuous to each convex portion 11831 in a direction perpendicular to the side of the side portion 1181b of the two main reflecting portions 1181 that are continuous to the flat plate portion 11832. An inclined reflecting surface 11831b is provided on the other inclined side. The inclination direction of the inclined reflecting surface 11831b is the same as the inclination direction of the main surface of the other inclined piece. The inclination angle of the inclined reflecting surface 11831b is preferably equal to or larger than the inclination angle of the main surface of the other inclined piece, and is about 10 ° larger in this embodiment.

  As shown in FIG. 12, the second connecting portion 1184 is continuous with the central portion in the direction parallel to the side of the outermost side portion 1181b of the main reflecting portion 1181 arranged on the outermost side. In addition, the second connecting portion 1184 is formed with a circular hole 1184a at the center when viewed in plan in the X direction. A circular hole 1311 shown in FIG. 10 is formed in the bottom 131 of the frame member 13 so as to face the hole 1184a. Further, when the printed circuit board 12 is disposed between the hole 1184 a of the second connecting portion 1184 and the hole 1311 of the bottom 131 of the frame member 13, the fixing hole 12 d of the printed circuit board 12 faces the hole 1183 a and the hole 1311. To do.

  The position where the second connecting portion 1184 is provided may not be the central portion of the side portion 1181b of the main reflecting portion 1181 in the direction parallel to the side, but may be a location close to the corner portion 1181a. Further, the position where the hole 1184a is formed may not be the center of the second connecting portion 1184, but may be a position close to the corner portion 1181a.

  The second connecting portion 1184 can be integrally formed from the same material as the reflecting member 118. The second connecting portion 1184 has two convex portions 11841 and a flat plate portion 11842.

  The flat plate portion 11842 has a rectangular main surface and is connected to the outermost side portion 1181b of the main reflecting portion 1181 arranged on the outermost side, and a hole 1184a is formed in the central portion. In the present embodiment, the thickness of the flat plate portion 11842 is equal to the thickness of the main reflecting portion 1181, and the surface facing the diffusion plate 3 is in the same plane. The hole 1184a may be formed over the side portion 1181b of the main reflecting portion 1181 that is continuous with the flat plate portion 11842.

  The two convex portions 11841 protrude from the flat plate portion 11842 toward the liquid crystal panel 2 that is the irradiated body. The two convex portions 11841 extend in a direction parallel to the side of the side portion 1181b of the main reflecting portion 1181 that continues to the flat plate portion 11842, and are provided on the main surface of the flat plate portion 11842 at a position sandwiching the hole 1184a in this direction. . When viewed in plan in the X direction, the convex portion 11841 is located outside the main reflecting portion 1181 that is continuous with the flat plate portion 11842. The height of the convex portion 11841, that is, the distance in the X direction between the portion of the convex portion 11841 that is farthest from the surface of the main reflecting portion 1181 in the X direction and the surface of the main reflecting portion 1181 is the height of the sub reflecting portion 1182. It is lower than the height H2, and the difference is, for example, 0.5 mm to 3 mm.

  One convex portion 11841 of the two convex portions 11841 is connected to one sub-reflecting portion 1182 of the two sub-reflecting portions 1182 connected to the side portion 1181b of the main reflecting portion 1181 continuous to the flat plate portion 11842. More specifically, one convex portion 11841 is connected to an inclined piece that is connected to the side portion 1181b of the main reflecting portion 1181 that is connected to the flat plate portion 11842 of the one sub-reflecting portion 1182. The other one of the two protrusions 11841 is connected to the other sub-reflection part 1182 of the two sub-reflection parts 1182 that are connected to the side part 1181b of the main reflection part 1181 that is connected to the flat plate part 11842. More specifically, the other convex portion 11841 is connected to an inclined piece that is connected to the side portion 1181 b of the main reflecting portion 1181 that is connected to the flat plate portion 11842 of the other sub-reflecting portion 1182.

  Each convex portion 11841 of the second connecting portion 1184 has the same inclination as the inclination direction of the main surface of the inclined piece continuous to each convex portion 11841 in the direction perpendicular to the side of the side portion 1181b of the main reflecting portion 1181 continuous to the flat plate portion 11842. It has a directional inclined reflecting surface 11841a. The inclination angle of the inclined reflecting surface 11841a is preferably equal to or larger than the inclination angle of the main surfaces of the continuous inclined pieces, and is about 10 ° larger in this embodiment.

  Such an integrated reflection member 18 is formed with respect to the bottom 131 of the frame member 13 by the first fixing member 101 and the second fixing member 102 and a plurality of retaining members 103 into which any one of them is inserted. Fixed. FIG. 13 is a perspective view of the first fixing member 101. FIG. 13A shows a state when the first fixing member 101 is viewed from the diffusion plate 3 side, and FIG. 13B is a view when the first fixing member 101 is viewed from the bottom 131 side of the frame member 13. The state of is expressed. FIG. 14 is a perspective view of the second fixing member 102. 14A shows a state when the second fixing member 102 is viewed from the diffusion plate 3 side, and FIG. 14B shows a state when the second fixing member 102 is viewed from the bottom 131 side of the frame member 13. The state of is expressed.

  FIG. 15 is a plan view and a bottom view of the retaining member 103 before the first fixing member 101 or the second fixing member 102 is inserted. FIG. 16 is a cross-sectional view of the retaining member 103 when cut along line BB shown in FIG. FIG. 17 is a diagram illustrating a state in which the integrated reflection member 18 illustrated in FIG. 11 is fixed to the bottom 131 of the frame member 13 by the first fixing member 101 and the second fixing member 102, and corresponds to FIG. To do. 18 is a cross-sectional view of the integrated reflective member 18 and the first fixing member 101 when cut along line CC shown in FIG.

  The first fixing member 101 is molded from a white resin material, for example, a highly reflective grade of polycarbonate. The first fixing member 101 has two inclined portions 1011, a fixing portion, and a support portion. In the present embodiment, the fixed portion and the support portion correspond to a substantially cylindrical shaft body 1012. The shaft body 1012 extends in the X direction and has a truncated cone shape with a distal end portion on the diffusion plate 3 side being tapered. The shaft body 1012 contacts the diffusion plate 3 at the tip on the diffusion plate 3 side and supports the diffusion plate 3. Thereby, bending of the diffusion plate 3 can be prevented. It should be noted that the shaft body 1012 is preferably point-contacted with the diffusion plate 3 so that it does not darken at the contact point with the diffusion plate 3, but there is a problem in strength, so that the tip is made into a truncated cone shape.

  A portion of the first fixing member 101 on the side of the frame member 13 of the shaft body 1012 is inserted into the hole 1183a of the first connecting portion 1183 and the hole 1311 of the bottom portion 131 of the frame member 13, and the retaining member 103 provided in the hole 1311. It is fixed in this hole 1311 via When the printed circuit board 12 is arranged between the hole 1183a of the first connecting portion 1183 and the hole 1311 of the bottom portion 131 of the frame member 13, the fixing hole 12d of the printed circuit board 12 is also inserted into the fixing hole 12d. A portion of the shaft body 1012 on the frame member 13 side is inserted.

  The retaining member 103 is molded from a white resin material, for example, a highly reflective grade of polycarbonate. The retaining member 103 has four rod-like portions 103a and an annular portion 103b. The rod-like portion 103a is spaced from the diffusion plate 3 side toward the bottom 131 side of the frame member 13 by an inner interval W1. Is provided to be narrow. The distance W1 on the diffusion plate 3 side is substantially equal to the diameter of the shaft body 1012, and the distance W1 on the bottom 131 side of the frame member 13 is less than the diameter of the shaft body 1012. Further, the interval W2 outside the rod-shaped portion 103a is equal to the diameter of the hole 1311. The opening diameter of the annular portion 103b is substantially equal to the diameter of the shaft body 1012. The outer diameter of the annular portion 103b is smaller than the diameters of the holes 1183a and 1184a of the first and second connecting portions 1183 and 1184 and the diameter of the fixing hole 12d of the printed circuit board 12.

  When the shaft body 1012 of the first fixing member 101 is inserted into the space between the four rod-like portions 103a inserted through the holes 1311 of the bottom 131 of the frame member 13, as shown in FIG. The rod-shaped portions 103a of the first and second rods are deformed to move away from the shaft body 1012. As a result, the shaft body 1012 is fixed to the bottom 131 of the frame member 13. At this time, as shown in FIG. 10, the tip of the end of the shaft body 1012 on the frame member 13 side protrudes from the hole 1311.

  Two inclined portions 1011 of the first fixing member 101 are connected to a portion of the shaft body 1012 on the diffusion plate 3 side. The inclined portion 1011 is provided corresponding to each of the two main reflecting portions 1181 connected to the first connecting portion 1183 through which the shaft body 1012 is inserted.

  Each inclined portion 1011 is in contact with or close to the side portion 1181b of the main reflection portion 1181 corresponding to the first connection portion 1183, and the corresponding main reflection portion 1181 is separated from the bottom portion 131 of the frame member 13. prevent. When the inclined portion 1011 and the side portion 1181b are close to each other, the interval L4 between the inclined portion 1011 and the side portion 1181b in the X direction is, for example, 0.1 mm to 1 mm. As described above, since the shaft body 1012 of the first fixing member 101 is fixed in the hole 1311 of the bottom portion 131 of the frame member 13, each inclined portion 1011 connected to the shaft body 1012 is also fixed to the frame member 13. As a result, the side portion 1181b of the main reflecting portion 1181 is restricted from being separated from the bottom portion 131 of the frame member 13 by a distance of the interval L4 or more. Therefore, the integrated reflection member 18 including the main reflection portion 1181 is fixed to the frame member 13.

  Preferably, each inclined portion 1011 is provided so as not to contact the main reflecting portion 1181 but to be close thereto. The reason for this is to prevent wrinkles from being generated in the integrated reflection member 18 when the integrated reflection member 18 is thermally expanded by heat generated by the light emitting unit 111 or the like. When the integrated reflecting member 18 is about to extend in the main surface direction (direction perpendicular to the X direction) of the main reflecting portion 1181 due to heat from the light emitting portion 111, each inclined portion 1011 must be in contact with the main reflecting portion 1181. In this case, since the extension is not hindered, generation of wrinkles in the integrated reflecting member 18 can be suppressed.

  As shown in FIG. 18, the two inclined portions 1011 are connected in an inverted V shape and form a recess. The convex portion 11831 of the first connecting portion 1183 is located in the concave portion. As a result, the first fixing member 101 is prevented from rotating around the axis of the shaft body 1012. In other words, the convex portion 11831 of the first connecting portion 1183 functions as a misalignment suppressing portion that suppresses misalignment of the inclined portion 1011 due to the rotation of the first fixing member 101. Since the convex portion 11831 is provided in the concave portion formed by the two inclined portions 1011, each of the two inclined portions 1011 is connected to the first connecting portion 1183 having the convex portion 11831. It is provided at the center of the side portion 1181b in the direction parallel to the side of the portion 1181b.

  As shown in FIG. 17, each inclined portion 1011 is provided with a gap with respect to the inclined piece of the adjacent sub-reflecting portion 1182 in a direction parallel to the side of the side portion 1181 b that is in contact with or close to. Therefore, the inclined reflecting surfaces 11831a and 11831b of the convex portion 11831 of the first connecting portion 1183 are provided between the inclined portion 1011 and the sub-reflecting portion 1182 in a direction parallel to the side of the side portion 1181b, and the light emitting portion 111 Will be exposed. As a result, part of the light emitted from the light emitting unit 111 is reflected toward the liquid crystal panel 2 that is the irradiated object by the inclined reflecting surfaces 11831a and 11831b. Note that the distance L5 between the inclined portion 1011 and the sub-reflecting portion 1182 in the direction parallel to the side of the side portion 1181b is, for example, 0.1 mm to 2 mm, and is 1 mm in this embodiment.

  As shown in FIG. 10, each inclined portion 1011 extends while being inclined in the same inclination direction as the inclined piece of the adjacent sub-reflecting portion 1182. Thereby, each inclination part 1011 can reflect the light radiate | emitted from the light emission part 111 toward the liquid crystal panel 2 which is a to-be-irradiated body. In the present embodiment, the inclination angle of the inclined portion 1011 is equal to the inclination angle of the inclined piece of the adjacent sub-reflecting portion 1182.

  Further, as shown in FIG. 18, each inclined portion 1011 is provided with a height higher than that of the adjacent sub-reflecting portion 1182. That is, the height H4 that is the distance in the X direction between the portion of the inclined portion 1011 that is farthest from the surface of the main reflecting portion 1181 in the X direction and the surface of the main reflecting portion 1181 is the height of the sub reflecting portion 1182. Higher than H2. The height H4 of the inclined portion 1011 is, for example, 4 mm to 5 mm, and is 4.5 mm in this embodiment.

  The total reflectance of the inclined portion 1011 is substantially equal to the total reflectance of the sub-reflecting portion 1182 and is, for example, about 90%. Here, “substantially equal” means that the total reflectance of the inclined portion 1011 is within the range of the total reflectance ± 10% of the sub-reflecting portion 1182.

  The second fixing member 102 is a member having a shape in which the inclined portion 1011 of the first fixing member 101 is changed from two to one, and includes an inclined portion 1021 and a shaft body 1022. The second fixing member 102 is molded using a white resin material, for example, a highly reflective grade of polycarbonate.

  The shaft body 1022 of the second fixing member 102 extends in the X direction, and the tip portion on the diffusion plate 3 side has a tapered truncated cone shape. The shaft body 1022 contacts the diffusion plate 3 at the tip on the diffusion plate 3 side and supports the diffusion plate 3.

  The portion of the second fixing member 102 on the side of the frame member 13 of the shaft body 1012 is inserted into the hole 1184 a of the second connecting portion 1184 and the hole 1311 of the bottom portion 131 of the frame member 13, and the retaining member 103 provided in this hole 1311. It is fixed in this hole 1311 via When the printed circuit board 12 is disposed between the hole 1184 a of the second connecting portion 1184 and the hole 1311 of the bottom 131 of the frame member 13, the second fixing member 102 is also inserted into the fixing hole 12 d of the printed circuit board 12. A portion of the shaft body 1022 on the frame member 13 side is inserted.

  The inclined portion 1021 of the second fixing member 102 is connected to a portion of the shaft body 1022 on the diffusion plate 3 side. The inclined portion 1021 is provided corresponding to the outermost main reflecting portion 1181 that is continuous with the second connecting portion 1184 through which the shaft body 1022 is inserted.

  The inclined portion 1021 is in contact with or close to the side portion 1181 b of the corresponding main reflecting portion 1181 that is continuous with the second connecting portion 1184, and prevents the main reflecting portion 1181 from separating from the bottom 131 of the frame member 13. When the inclined portion 1021 and the side portion 1181b are close to each other, the interval L6 between the inclined portion 1021 and the side portion 1181b in the X direction is, for example, 0.1 mm to 1 mm. As described above, since the shaft body 1022 of the second fixing member 102 is fixed in the hole 1311 of the bottom 131 of the frame member 13, the inclined portion 1021 connected to the shaft body 1022 is also fixed to the frame member 13, As a result, the side portion 1181b of the main reflecting portion 1181 is restricted from being separated from the bottom portion 131 of the frame member 13 by a distance of the interval L6 or more. Therefore, the integrated reflection member 18 including the main reflection portion 1181 is fixed to the frame member 13.

  Preferably, the inclined portion 1021 is provided so as not to contact the main reflecting portion 1181 but close to it. The reason for this is to prevent wrinkles from being generated in the integrated reflection member 18 when the integrated reflection member 18 is thermally expanded by heat generated by the light emitting unit 111 or the like. When the integral reflecting member 18 is about to extend in the main surface direction (direction perpendicular to the X direction) of the main reflecting portion 1181 due to heat from the light emitting portion 111, the inclined portion 1021 does not contact the main reflecting portion 1181. Since the extension is not hindered, the generation of wrinkles in the integrated reflecting member 18 can be suppressed.

  As shown in FIG. 10, the inclined portion 1021 is disposed along the convex portion 11841 of the second connecting portion 1184. As a result, the second fixing member 102 is prevented from rotating around the axis of the shaft body 1022. In other words, the convex portion 11841 of the second connecting portion 1184 functions as a misalignment suppressing portion that suppresses misalignment of the inclined portion 1021 due to the rotation of the second fixing member 102. Note that since the inclined portion 1021 is provided along the convex portion 11841, the inclined portion 1021 has a side portion 1181b in a direction parallel to the side of the side portion 1181b where the second connecting portion 1184 having the convex portion 11841 continues. It will be provided in the central part of.

  As shown in FIG. 17, the inclined portion 1021 is provided with a gap with respect to the inclined piece of the adjacent sub-reflecting portion 1182 in the direction parallel to the side of the side portion 1181b that is in contact with or close to the inclined portion. Therefore, the inclined reflecting surface 11841a of the convex portion 11841 of the second connecting portion 1184 is provided between the inclined portion 1021 and the sub-reflecting portion 1182 in a direction parallel to the side of the side portion 1181b, and is exposed to the light emitting portion 111. Will do. Thereby, a part of the light emitted from the light emitting unit 111 is reflected toward the liquid crystal panel 2 which is the irradiated body by the inclined reflection surface 11841a. Note that the distance L7 between the inclined portion 1021 and the sub-reflecting portion 1182 in the direction parallel to the side of the side portion 1181b is, for example, 0.1 mm to 2 mm, and is 1 mm in the present embodiment.

  As shown in FIG. 10, the inclined portion 1021 extends while inclining in the same inclination direction as the inclined piece of the adjacent sub-reflecting portion 1182. Thereby, the inclined part 1021 can reflect the light emitted from the light emitting part 111 toward the liquid crystal panel 2 which is an irradiated body. In the present embodiment, the inclination angle of the inclined portion 1021 is equal to the inclination angle of the inclined piece of the adjacent sub-reflecting portion 1182.

  Further, as shown in FIG. 10, the inclined portion 1021 is provided higher than the adjacent sub-reflecting portion 1182. That is, the height H5 that is the distance in the X direction between the portion of the inclined portion 1021 that is farthest from the surface of the main reflecting portion 1181 in the X direction and the surface of the main reflecting portion 1181 is the height of the sub reflecting portion 1182. Higher than H2. The height H5 of the inclined portion 1021 is, for example, 4 mm to 5 mm, and is 4.5 mm in this embodiment.

  The total reflectance of the inclined portion 1021 is substantially equal to the total reflectance of the sub-reflecting portion 1182 and is, for example, about 90%. Here, “substantially equal” means that the total reflectance of the inclined portion 1021 is within the range of the total reflectance ± 10% of the sub-reflecting portion 1182.

  In the present embodiment, the integrated reflecting member 18 can be fixed to the bottom 131 of the frame member 13 by the first and second fixing members 101 and 102 as described above, and the light emitted from the light emitting unit 111. Can be reflected toward the liquid crystal panel 2 by the inclined portions 1011 and 1021 of the first and second fixing members 101 and 102, so that the luminance in the surface direction of the liquid crystal panel 2 is uniform. 2 can be irradiated with light. In the present invention, it is not necessary to provide all of the first and second fixing members 101 and 102, and it is sufficient that at least one of them is provided.

  In the present embodiment, the inclined portions 1011 and 1021 are provided higher in height than the sub-reflecting portion 1182 in the optical axis S direction (X direction). When the integrated reflection member 18 is fixed to the bottom 131 of the frame member 13 by the first and second fixing members 101 and 102 which are members different from the integrated reflection member 18 as in the present embodiment, the boundary of the members In the vicinity of the side portion 1181b where there is, there is a risk that the amount of light irradiated to the liquid crystal panel 2 that is the object to be irradiated may decrease, but the heights H4 and H5 of the inclined portions 1011 and 1021 are high, so the amount of irradiation light is supplemented. A decrease in the amount of irradiation light can be suppressed.

  In the present embodiment, the inclined portions 1011 and 1021 are arranged at the center of the side portion 1181b in the direction parallel to the side of the side portion 1181b where the first and second connecting portions 1183 and 1184 having the convex portions 11831 and 11841 are continuous. Provided. As described above, the amount of irradiation light is reduced at the portion where the boundary between the integrated reflection member 18 and the first and second fixing members 101 and 102 exists. Therefore, if this boundary is located closer to the corner portion 1181a, the amount of irradiation light is insufficient. In this embodiment, the inclined portions 1011 and 1021 are provided at the center of the side portion 1181b, and this boundary is closer to the center of the side portion 1181b. Therefore, it is possible to prevent a decrease in the amount of irradiation light at the corner portion 1181a.

  As another embodiment of the present invention, instead of making the inclined portions 1011 and 1021 higher than the sub-reflecting portion 1182, the height may be the same and the inclination angle may be increased. FIG. 19 shows an example in which the inclination angles of the inclined portions 1011 and 1021 are increased. FIG. 19 corresponds to FIG. As shown in FIG. 19, the decrease in the amount of irradiation light due to the boundary between members can also be suppressed by increasing the inclination angle of the inclined portions 1011 and 1021. Note that the inclined portions 1011 and 1021 may have a higher height and a larger inclination angle than the sub-reflecting portion 1182.

  In the present embodiment, the integrated reflection member 18 includes convex portions 11831 and 11841 that function as a positional deviation suppression unit that suppresses the positional deviation of the inclined portions 1011 and 1021. By suppressing the displacement of the inclined portions 1011 and 1021 by the convex portions 11831 and 11841, it is possible to suppress the occurrence of uneven illuminance of the liquid crystal panel 2 that is the irradiated body. In addition, as a position shift suppression part, it does not need to be the convex parts 11831 and 11841.

  20 and 21 show a misregistration suppressing unit in another embodiment of the present invention. 20 and 21 correspond to FIG. As shown in FIG. 20, as the misregistration suppressing portion in another embodiment of the present invention, instead of providing the convex portions 11831 and 11841, second holes 1183 b and 1184 b are formed in the flat plate portions 11832 and 11842. May be. In this case, the first and second fixing members 101 and 102 are provided with a second shaft body inserted through the second holes 1183b and 1184b. Instead of the second holes 1183b and 1184b, the flat plate portions 11832 and 11842 may be formed with recesses into which the second shaft bodies of the first and second fixing members 101 and 102 are fitted. .

  In addition, as shown in FIG. 21, as a misregistration suppressing unit in another embodiment of the present invention, instead of providing the convex portions 11831 and 11841, the flat plate portions 11832 and 11842 are arranged in the same protruding direction as the convex portions 11831 and 11841. It is good also as a convex board 1185,1186 by bend | folding. In this case, it is not necessary to provide the second shaft body on the first and second fixing members 101 and 102, and the first and second fixing members 101 and 102 can be used as they are.

  In the present embodiment, the inclined portions 1011 and 1021 are provided with a gap with respect to the inclined piece of the adjacent sub-reflecting portion 1182 in a direction parallel to the side of the side portion 1181b that is in contact with or close to. Thus, when the integrated reflecting member 18 is fixed by the first and second fixing members 101 and 102, the first and second fixing members 101 and 102 and the integrated reflecting member 18 are less likely to interfere with each other, and the fixing is easy. Become. Further, since the inclined portions 1011 and 1021 do not come into contact with the sub-reflecting portion 1182, the integrated reflecting member 18 in the main surface direction (direction perpendicular to the X direction) of the main reflecting portion 1181 due to heat generated by the light emitting portion 111 or the like. Since it is not hindered to elongate when trying to elongate, the occurrence of wrinkles in the integrated reflective member 18 is suppressed.

  In this embodiment, since the inclined portions 1011 and 1021 do not contact the sub-reflecting portion 1182, the inclined reflecting surfaces 11831 a, 11831 b and 11841 a of the convex portions 11831 and 11841 are exposed to the light emitting portion 111. The inclined reflecting surfaces 11831a, 11831b, and 11841a can reflect light toward the liquid crystal panel 2 that is an object to be irradiated. Therefore, it is possible to suppress a decrease in the amount of irradiation light due to the provision of the first and second fixing members 101 and 102. Furthermore, since the inclination angles of the inclined reflecting surfaces 11831a, 11831b, and 11841a are larger than those of the sub-reflecting portion 1182, it is possible to further suppress a decrease in the amount of irradiation light.

  As another embodiment of the present invention, the end of the inclined portions 1011 and 1021 on the side of the sub-reflecting portion 1182 in the direction parallel to the side of the side portion 1181b is in the optical axis S direction with respect to the sub-reflecting portion 1182. It may be provided so as to overlap (X direction). FIG. 22 shows an example in which the inclined portions 1011 and 1021 overlap the sub-reflecting portion 1182. In this example, since the sub-reflecting portion 1182 functions as a position shift suppressing portion, the first and second connecting portions 1183 and 1184 are not provided with the convex portions 11831 and 11841. Even when configured as in this example, the integrated reflecting member 18 can be fixed to the bottom 131 of the frame member 13 by the first and second fixing members 101 and 102, and the light emitted from the light emitting unit 111 is used. Can be reflected toward the liquid crystal panel 2 by the first and second fixing members 101 and 102.

  In the present embodiment, when the printed circuit board 12 is positioned between the holes 1183a and 1184a of the first and second connecting portions 1183 and 1184 and the hole 1311 of the bottom 131 of the frame member 13, the printed circuit board 12 is fixed. The shaft bodies 1012 and 1022 are inserted through the holes 12d. Thus, the printed board 12 can be fixed to the bottom 131 of the frame member 13 together with the integrated reflection member 18 by the first and second fixing members 101 and 102.

  Further, in the present embodiment, each sub-reflecting portion 1182 is moved away from the printed circuit board 12 in the optical axis S direction in the direction perpendicular to the optical axis S direction and toward the diffusion plate 3 so as to go to the diffusion plate 3. It is formed to be inclined with respect to the reflecting portion 1181. The inclined portions 1011 and 1021 extend in the same inclination direction as the inclined pieces of the adjacent sub-reflecting portions 1182. Therefore, the light emitted from the light emitting unit 111 can be spread and irradiated in a direction perpendicular to the optical axis S direction. The sub-reflecting portion 1182 and the inclined portions 1011 and 1021 may extend vertically without being inclined with respect to the main reflecting portion 1181.

  In the present embodiment, the inclined portions 1011 and 1021 have a total reflectance substantially equal to the total reflectance of the sub-reflecting portion 1182. Thereby, the brightness in the surface direction of the liquid crystal panel 2 which is an irradiation object can be made more uniform.

  In the above-described embodiment, any one of the first and second fixing members 101 and 102 is provided on all the side portions 1181b of all the main reflecting portions 1181, but not all of them. For example, as shown in FIG. 23, first and second fixing members 101 and 102 may be provided every other plurality. In the embodiment shown in FIG. 23, the first connecting portion 1183 and the second connecting portion 1184 are not formed on the side portion 1181b where the first and second fixing members 101, 102 are not provided, but instead on the side portion 1181b. A second sub-reflecting portion 1187 that smoothly connects two continuous inclined pieces is formed. The height, inclination direction, and inclination angle of the second sub-reflecting portion 1187 are equal to the height, inclination direction, and inclination angle of the two inclined pieces.

  In the embodiment shown in FIG. 23, unlike the embodiment shown in FIG. 2, all the light emitting units 111 are provided on one printed circuit board 12. Note that, as an embodiment of the present invention, all the light emitting units 111 may be provided on two printed circuit boards 12.

DESCRIPTION OF SYMBOLS 1 Backlight unit 2 Liquid crystal panel 3 Diffusion plate 11 Light-emitting device 12 Printed circuit board 13 Frame member 18 Integrated reflection member 100 Liquid crystal display device 101 1st fixing member 102 2nd fixing member 103 Detachment member 111 Light-emitting part 118 Reflecting member 1011 1021 Inclined portion 1012, 1022 Shaft body 1181 Main reflection portion 1182 Sub reflection portion 1183 First connection portion 1184 Second connection portion 11831, 11841 Projection

Claims (13)

A plurality of light emitting units arranged in alignment, a plurality of light emitting units emitting light; and
A reflecting member provided around each light emitting unit and reflecting light emitted from the light emitting unit toward an irradiated body,
A main reflecting portion that extends in a direction perpendicular to the optical axis of the light emitting portion and whose outer shape when viewed in the optical axis direction is a polygonal shape;
A reflective member having a sub-reflective portion that is connected to a corner portion of the main reflective portion and extends at an angle with respect to the main reflective portion;
A support member for supporting the reflection member;
A fixing member for fixing the reflecting member to the support member;
The light to be irradiated is emitted from the at least one light emitting part, extending in an inclined manner with respect to a main reflecting part of a reflecting member provided around at least one light emitting part among the plurality of light emitting parts. An inclined portion that is reflected toward the at least one light emitting portion, and comes into contact with or close to a side portion of the main reflecting portion of the reflecting member provided around the at least one light emitting portion so that the main reflecting portion is separated from the support member. An inclined part to prevent
An illuminating apparatus comprising: a fixing member provided integrally with the inclined portion and having a fixing portion fixed to the support member.   The lighting device according to claim 1, wherein the inclined portion is higher in height in the optical axis direction than the sub-reflecting portion or has a larger inclination angle with respect to the main reflecting portion.   The lighting device according to claim 1, wherein the inclined portion is provided in contact with or close to a central portion of the side portion in a direction parallel to the side of the side portion.   The illuminating device according to claim 1, wherein the reflection member includes a misregistration suppressing unit that suppresses misalignment of the inclined portion.   The lighting device according to claim 1, wherein the inclined portion is provided with a gap with respect to the sub-reflecting portion in a direction parallel to the side of the side portion. The misregistration suppressing portion is a convex portion protruding toward the irradiated body,
The convex portion is an inclined reflecting surface that extends obliquely with respect to a main reflecting portion of a reflecting member provided around the at least one light emitting portion, and emits light emitted from the at least one light emitting portion. An inclined reflecting surface that reflects toward the irradiated object;
The lighting device according to claim 5, wherein the inclined reflecting surface is provided between the inclined portion and the sub-reflecting portion in a direction parallel to the side of the side portion. .   2. The inclined portion is provided such that an end on the side of the sub-reflecting portion in a direction parallel to the side of the side portion overlaps the sub-reflecting portion in the optical axis direction. The illuminating device as described in any one of -4. The reflecting member includes a connecting portion that connects a main reflecting portion of the reflecting member provided around the at least one light emitting portion and a main reflecting portion provided around the other light emitting portion adjacent to the main reflecting portion. Have
When the connection part is viewed in the optical axis direction, a hole is formed in the center part,
The support member is formed with a hole facing the hole of the connecting portion,
The said fixing | fixed part is a shaft body extended in the said optical axis direction, and being penetrated by the hole of the said connection part, and the hole of the said supporting member, The one of Claims 1-7 characterized by the above-mentioned. Lighting equipment. A substrate on which the light emitting unit is mounted;
The substrate is formed with a hole facing the hole of the connecting portion,
The lighting device according to claim 8, wherein the shaft is inserted through a hole in the substrate.   The sub-reflective portion is inclined so as to be separated from the main reflective portion in the optical axis direction as it is separated from the main reflective portion in one direction out of the directions perpendicular to the optical axis direction. Item 10. The lighting device according to any one of Items 1 to 9.   The lighting device according to claim 1, wherein a total reflectance of the inclined portion is substantially equal to a total reflectance of the sub-reflecting portion. A display panel;
A display device comprising: the illumination device according to claim 1, which irradiates light to the display panel. A diffusion plate provided between the display panel and the light emitting unit;
The display device according to claim 12, wherein the fixing member has a support portion that is provided integrally with the fixing portion and supports the diffusion plate.

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