JP2013152863A - Lighting device and display device having the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a lighting device capable of suppressing deterioration of luminance in corner regions of an illuminated member.SOLUTION: The lighting device 20 is provided with a plurality of light-emitting elements 21 and mounting substrates 22 on each of which the plurality of light-emitting elements 21 are mounted. The plurality of mounting substrates 22 include mounting substrates 121 that are arranged adjacent to corner parts C of the lighting system 20 and mounting substrates 122 other than the mounting substrates 121. The mounting substrates 121 at portions in the vicinity of the corner parts C have installed projection parts 121a projected toward the corner parts C, and the light-emitting element 21 is mounted on each projection part 121a.

Description

  The present invention relates to a lighting device and a display device including the same, and more particularly to a lighting device including a plurality of light emitting elements and a display device including the same.

  Since a liquid crystal display device (display device) has a non-luminous display panel (illuminated member), a backlight device (illumination device) that irradiates light to the display panel is usually mounted. As such a backlight device, a direct type backlight device having a plurality of LEDs (light emitting elements) is known.

  FIG. 11 is a cross-sectional view illustrating an example of a conventional display device including a direct type backlight device including a plurality of LEDs. As shown in FIG. 11, the display device 1001 includes a liquid crystal display panel 1002 and a backlight device 1010 that illuminates the liquid crystal display panel 1002. The backlight device 1010 includes a plurality of LEDs 1011, a diffusion lens 1012 disposed so as to cover the LEDs 1011, a mounting substrate 1013 on which the plurality of LEDs 1011 are mounted, and a reflection that reflects light from the LEDs 1011 toward the liquid crystal display panel 1002. It includes a sheet 1014, a diffusion plate 1015 and a plurality of optical sheets 1016 arranged in front of the LED 1011 (on the liquid crystal display panel 1002 side), and a chassis 1017 for housing the LED 1011, the mounting substrate 1013, and the like.

  The plurality of LEDs 1011 are arranged in the longitudinal direction and the short direction of the liquid crystal display panel 1002. The diffusion lens 1012 protrudes from the opening of the reflection sheet 1014 to the front side (the liquid crystal display panel 1002 side). Light emitted from the LED 1011 is transmitted through the diffusion lens 1012, and a part of the light is reflected by the diffusion plate 1015 and reflected by the reflection sheet 1014 to the liquid crystal display panel 1002 side.

  The reflection sheet 1014 includes a rectangular bottom surface portion 1014a and an inclined surface portion 1014b bent toward the liquid crystal display panel 1002 so as to have a predetermined inclination angle with respect to the bottom surface portion 1014a. Thereby, the light emitted from the LED 1011 is reflected to the liquid crystal display panel 1002 side by the inclined surface portion 1014b of the reflection sheet 1014 at the peripheral edge portion of the backlight device 1010. For this reason, it is possible to suppress that the brightness | luminance of the peripheral part of the liquid crystal display panel 1002 falls (a peripheral part looks dark).

  In addition, the illuminating device by which the peripheral part of the reflection sheet was bent is disclosed by patent document 1, for example.

JP 2011-34955 A

  However, in the conventional display device 1001, as shown in FIG. 12, when the backlight device 1010 is thinned, the inclination angle of the inclined surface portion 1014b of the reflection sheet 1014 becomes small. In particular, light emitted from the LED 1011 toward the corner portion of the reflection sheet 1014 (corner portion of the backlight device 1010) is not easily reflected in the thickness direction of the backlight device 1010 (the liquid crystal display panel 1002 side). For this reason, there is a problem that the brightness of the corner area S1001 (see FIG. 13) of the liquid crystal display panel 1002 is lowered (the corner area S1001 looks dark). In addition, the hatching area | region of FIG. 13 has shown corner area | region S1001.

  The present invention has been made to solve the above-described problems, and an object of the present invention is to provide an illumination device capable of suppressing a decrease in luminance of a corner area of a member to be illuminated, and the illumination device It is to provide a display device provided.

  In order to achieve the above object, an illumination device of the present invention is an illumination device that illuminates a member to be illuminated, and includes a plurality of light emitting elements disposed on a back side of the member to be illuminated, and a plurality of light emitting elements each. A plurality of mounting boards, and the plurality of mounting boards includes a first mounting board disposed adjacent to a corner portion of the lighting device, and a second mounting board other than the first mounting board, A protruding portion protruding toward the corner portion is provided in a portion of the first mounting substrate near the corner portion, and a light emitting element is mounted on the protruding portion.

  In this illuminating device, as described above, of the first mounting substrate disposed adjacent to the corner portion of the illuminating device, the portion in the vicinity of the corner portion is provided with a protruding portion protruding toward the corner portion side. The light emitting element is mounted on the protruding portion. That is, a light emitting element is additionally arranged near the corner portion (corner region) of the lighting device. Thereby, since the quantity of the light radiate | emitted from the corner area | region of an illuminating device can be increased, it can suppress that the brightness | luminance of the corner area | region of a to-be-illuminated member falls (a corner area | region looks dark). Such a configuration is particularly effective for a thin lighting device.

  In the lighting device, preferably, the mounting substrate is formed to extend in the first direction, and the protruding portion protrudes outward in the first direction from the end surface in the first direction of the second mounting substrate.

  In the lighting device, preferably, the mounting substrate is formed to extend in the first direction, and the protruding portion protrudes outward from an end surface in the second direction intersecting the first direction of the first mounting substrate.

  Preferably, the lighting device includes a reflective sheet disposed on the mounting substrate, and the reflective sheet includes a bottom surface portion disposed substantially parallel to the illuminated member and an inclined surface portion inclined with respect to the bottom surface portion. An opening or a notch is formed in a front portion of the light emitting element mounted on the projecting portion of the inclined surface portion. If comprised in this way, when the light emitting element is additionally arrange | positioned in the corner part vicinity of an illuminating device, it can suppress that the light radiate | emitted from the light emitting element is interrupted by the inclined surface part of a reflective sheet.

  In the lighting device, preferably, the first mounting substrate has a larger area than the second mounting substrate. If comprised in this way, a protrusion part can be easily provided in a 1st mounting board | substrate.

  In the above illumination device, preferably, the plurality of light emitting elements are arranged in a matrix except for the light emitting elements mounted on the protruding portions, and the light emitting elements mounted on the protruding portions are a plurality of arranged in a matrix. Compared with the light emitting element arrange | positioned adjacent to the said corner part among these light emitting elements, it arrange | positions near the said corner part. If comprised in this way, the quantity of the light radiate | emitted from the corner area | region of an illuminating device can be increased easily.

  In the lighting device, preferably, the power supplied to the light emitting elements mounted on the protrusions is higher than the power supplied to the other light emitting elements. If comprised in this way, since the quantity of the light radiate | emitted from the corner area | region of an illuminating device can be increased more, it can suppress more that the brightness | luminance of the corner area | region of a to-be-illuminated member falls.

  In the lighting device, preferably, the first mounting substrate includes a plurality of wiring layers, and the light emitting elements mounted on the first mounting substrate are divided into two or more groups according to the supplied power, Each group is electrically connected to a different wiring layer.

  In this case, preferably, the light emitting element mounted on the protruding portion is electrically connected to a wiring layer other than the outermost layer among the plurality of wiring layers through a through hole.

  In the illumination device, the light emitting element preferably includes a white light emitting diode.

  In the lighting device in which the light-emitting element includes a white light-emitting diode, the white light-emitting diode is preferably a blue light-emitting chip that emits blue light, and a light-emitting layer that is provided around the blue light-emitting chip and has a light emission peak in a yellow region. Or a combination of a blue light emitting chip that emits blue light and a light emitting layer provided around the blue light emitting chip and having a light emission peak in each of a green region and a red region, or in blue A combination of a blue light emitting chip that emits light, a light emitting layer provided around the blue light emitting chip and having a light emission peak in a green region, and a red light emitting chip that emits red light, or a blue light emitting chip that emits blue light A red light emitting chip that emits red light and a green light emitting chip that emits green light, or purple that emits ultraviolet light Comprising a light emitting chip, disposed around the ultraviolet light emitting chip, the blue region, and the light emitter layers each having a light emission peak in the red region and green region, of the combination, the combination of any of the.

  In this case, in the lighting device, preferably, only the light emitting element mounted on the protruding portion is a white light emitting diode including a blue light emitting chip that emits blue light and a light emitting layer having a light emission peak in a yellow region.

  The illumination device preferably includes a diffusing lens that is provided so as to cover the light emitting side of the light emitting element and diffuses light from the light emitting element. If comprised in this way, since the light from a light emitting element can be diffused, it can suppress more that the brightness | luminance of the corner area | region of a to-be-illuminated member falls.

  In the illuminating device including the diffusion lens, preferably, the diffusion lens increases light emitted toward the corner portion rather than directly above. If comprised in this way, it can suppress effectively that the brightness | luminance of the corner area | region of a to-be-illuminated member falls.

  In the illumination device including the diffusion lens, preferably, the diffusion lens is provided in a light emitting element other than the light emitting element mounted on the protruding portion.

  A display device of the present invention includes the illumination device having the above-described configuration and a display panel that performs display using light from the illumination device. If comprised in this way, the display apparatus which can suppress that the brightness | luminance of the corner area | region of a display panel (illuminated member) falls can be obtained.

  In the above display device, the display panel is preferably a liquid crystal display panel using liquid crystal.

  As described above, according to the present invention, it is possible to easily obtain an illuminating device and a display device including the illuminating device capable of suppressing a decrease in luminance of a corner area of a member to be illuminated.

It is the disassembled perspective view which showed the structure of the television receiver provided with the illuminating device of 1st Embodiment of this invention. It is the disassembled perspective view which showed the structure of the display apparatus of 1st Embodiment of this invention shown in FIG. It is the top view which showed the structure of the light emitting element, diffusion lens, and mounting board | substrate of 1st Embodiment of this invention shown in FIG. It is sectional drawing which showed the structure of the mounting substrate of 1st Embodiment of this invention shown in FIG. It is sectional drawing which showed the structure of the light emitting element of 1st Embodiment of this invention shown in FIG. It is sectional drawing which showed the structure of the illuminating device of 1st Embodiment of this invention shown in FIG. It is the expanded sectional view which showed an example of the structure of the diffusion lens of 1st Embodiment of this invention shown in FIG. It is the figure which showed the light distribution pattern (directional characteristic) of the light radiate | emitted from the diffuser lens shown in FIG. It is the top view which showed the structure of the light emitting element, diffuser lens, and mounting board | substrate of 2nd Embodiment of this invention. It is the top view which showed the structure of the light emitting element, diffusion lens, and mounting board | substrate of 3rd Embodiment of this invention. It is sectional drawing which showed an example of the conventional display apparatus provided with the direct type backlight apparatus containing several LED. FIG. 12 is a cross-sectional view illustrating a state in which the backlight device of the conventional display device illustrated in FIG. 11 is thinned. It is the top view which showed the liquid crystal display panel of the display apparatus shown in FIG.

  Embodiments of the present invention will be described below with reference to the drawings. In order to facilitate understanding, even a cross-sectional view may not be hatched.

(First embodiment)
With reference to FIGS. 1-8, the structure of the television receiver 1 provided with the illuminating device 20 by 1st Embodiment of this invention is demonstrated.

  As shown in FIG. 1, the television receiver 1 according to the first embodiment of the present invention includes a display device 10 including an illumination device 20, a front cabinet 2 and a back cabinet 3 that house the display device 10, a speaker 4, A tuner substrate 5, a power supply substrate 6, and a support member 7 are provided. Since the front cabinet 2, the back cabinet 3, the speaker 4, the tuner board 5, the power supply board 6 and the support member 7 can be those conventionally used, they will be briefly described.

  The front cabinet 2 and the back cabinet 3 house a display device 10, a tuner substrate 5, and a power supply substrate 6. The tuner board 5 has a function of generating an image signal and an audio signal of a predetermined channel from the received radio wave. The speaker 4 is attached to the front cabinet 2 and has a function of emitting sound based on an audio signal generated by the tuner board 5. The power supply board 6 is configured to supply power to the display device 10, the speaker 4, and the tuner board 5. The display device 10 is supported by the support member 7. Note that the speaker 4, the tuner substrate 5, and the power supply substrate 6 may be assembled in the display device 10.

  As shown in FIG. 2, the display device 10 is arranged on a frame-like bezel 11, a display panel 12 (illuminated member) whose peripheral edge is covered by the bezel 11, and the back side of the display panel 12. It is comprised with the illuminating device 20 which illuminates. Note that the “back side (lower side in FIG. 2)” of the “back side of the display panel 12” is an orientation concept that is also applied to other components.

  The display panel 12 includes a liquid crystal display panel, and includes an AM substrate (active matrix substrate) 12a and a counter substrate 12b that sandwich a liquid crystal layer (not shown). The display panel 12 displays an image using light from the lighting device 20.

  The illumination device 20 is a direct type backlight device and is formed in a rectangular shape having four corner portions C (see FIG. 3). The lighting device 20 includes a plurality of light emitting elements 21, a plurality of mounting boards 22 each having a plurality of light emitting elements 21 mounted thereon, a reflection sheet 23 disposed on the front side of the mounting board 22, and the front surface of the reflection sheet 23. It includes a diffusion plate 24 and a plurality of optical sheets 25 disposed on the side, and a front chassis 26 and a back chassis 27 that house these.

  As shown in FIG. 3, the mounting substrate 22 is formed in an elongated shape extending in the longitudinal direction (A direction) of the display panel 12. In addition, for example, two mounting boards 22 are arranged along the longitudinal direction (A direction) of the mounting board 22, and along the short side direction of the mounting board 22 (B direction orthogonal (crossing) the A direction). For example, five or more are arranged. The A direction is an example of the “first direction” in the present invention, and the B direction is an example of the “second direction” in the present invention.

  The mounting substrate 22 includes four mounting substrates 121 (first mounting substrate) disposed adjacent to the corner portion C of the lighting device 20 and a mounting substrate 122 (second mounting substrate) other than the mounting substrate 121. It is out. A protruding portion 121 a that protrudes toward the corner portion C is provided in a portion of the mounting substrate 121 near the corner portion C of the lighting device 20. For this reason, the mounting substrate 121 has a larger area than the mounting substrate 122. In the present embodiment, the mounting substrate 22 includes two types of mounting substrates 121 and one type of mounting substrate 122.

  The protruding portion 121 a of the mounting substrate 121 protrudes outward in the A direction from the end surface 122 a in the A direction of the mounting substrate 122. The protruding portion 121a protrudes outward from the end surface 121b of the mounting substrate 121 in the B direction. That is, in the present embodiment, the protruding portion 121a protrudes in an oblique direction from a portion near the corner portion C of the mounting substrate 121.

  The mounting substrate 22 is formed of a thermoplastic resin substrate to which glass fibers are added. Specifically, as shown in FIG. 4, the mounting substrate 22 includes an aluminum substrate 220, an insulating layer 221 a, a wiring layer 222 a, an insulating layer 221 b, a wiring layer 222 b, and a solder resist layer 223 that are sequentially formed on the aluminum substrate 220. And is composed of. In the present embodiment, at least the mounting substrate 121 includes two (plural) wiring layers 222a and 222b, and the other mounting substrate 122 may include only one wiring layer, or two (plural). The wiring layers 222a and 222b may be included. The numbers of insulating layers and wiring layers can be appropriately changed as necessary.

  The insulating layers 221a and 221b are formed of a thermoplastic resin to which glass fibers are added. Examples of the thermoplastic resin include polyetherimide (PEI: Polyetherimide), polyethersulfone (PES), polyetheretherketone (PEEK), polytetrafluoroethylene (PTFE), and polymer liquid crystal. Any one of Polymer) or a combination thereof can be used.

  Of the wiring layers 222 a and 222 b, the wiring layer 222 a other than the outermost layer (uppermost layer) is electrically connected to the light emitting element 21 through the through hole 224. The wiring layers 222a and 222b are made of, for example, copper foil. The wiring layers 222a and 222b are electrically connected to the power supply substrate 6 (see FIG. 1), and are configured to be supplied with a current (power) for causing the light emitting element 21 to emit light.

  As shown in FIG. 3, the light emitting elements 21 are mounted on the mounting substrate 22 at a predetermined pitch in the A direction using a solder layer or the like (not shown).

  The light emitting element 21 is also mounted on the protruding portion 121 a of the mounting substrate 121. Except for the light emitting element 21a mounted on the protruding portion 121a, the plurality of light emitting elements 21 are arranged in the A direction and the B direction and arranged in a matrix. Further, the light emitting element 21a mounted on the protruding portion 121a is closer to the corner portion C than the light emitting element 21b disposed adjacent to the corner portion C among the plurality of light emitting elements 21 arranged in a matrix. Is arranged.

  At least on the mounting substrate 121, the plurality of light emitting elements 21 are divided into two or more groups depending on the supplied power. For example, it is divided into at least two groups: a group including the light emitting element 21a mounted on the protruding portion 121a and a group including the other light emitting elements 21. In the mounting substrate 121, the plurality of light emitting elements 21 are electrically connected to different wiring layers 222a and 222b for each group. For example, the group including the light emitting element 21a is electrically connected to the wiring layer 222a through the through hole 224, and the group including the other light emitting elements 21 is electrically connected to the wiring layer 222b. Then, higher power is supplied to the light emitting element 21 a mounted on the protruding portion 121 a than the other light emitting elements 21.

  Note that three or more wiring layers may be provided on the mounting substrate 121, and the light emitting elements 21 other than the light emitting elements 21a may be divided into two or more groups and electrically connected to different wiring layers for each group.

  The light emitting element 21 is formed by, for example, a white LED (light emitting diode). As shown in FIG. 5, the light emitting element 21 includes a blue light emitting chip 210 that emits blue light, a light emitting layer 211 that is provided around the blue light emitting chip 210 and has a light emission peak in a yellow region, and a case for housing these. 212. The light emitting element 21 may include a blue light emitting chip 210 that emits blue light, and a light emitting layer that is provided around the blue light emitting chip 210 and has a light emission peak in each of a green region and a red region. . The light emitting element 21 includes a blue light emitting chip 210 that emits blue light, a light emitting layer that is provided around the blue light emitting chip 210 and has a light emission peak in a green region, and a red light emitting chip that emits red light. You may go out. The light emitting element 21 may include a blue light emitting chip 210 that emits blue light, a red light emitting chip that emits red light, and a green light emitting chip that emits green light. In addition, the light emitting element 21 includes an ultraviolet light emitting chip that emits ultraviolet light, and a light emitting layer that is provided around the ultraviolet light emitting chip and has an emission peak in each of a blue region, a red region, and a green region. May be included.

  Further, only the light emitting element 21a mounted on the protruding portion 121a may include a blue light emitting chip 210 that emits blue light and a light emitting layer 211 having a light emission peak in a yellow region. And the other light emitting element 21 may be comprised by white LED of another structure.

  The light emitting element 21 is formed so as to emit light toward the front (on the diffusion plate 24 side). As shown in FIGS. 3 and 6, each light emitting element 21 is provided with a diffusion lens 28 having a function of diffusing light so as to cover the light emitting side of the light emitting element 21. The diffusion lens 28 is made of, for example, a transparent resin. The diffusion lens 28 may be fixed to the mounting substrate 22 or may be fixed to the back chassis 27.

  The diffusing lens 28 preferably has a function of increasing the light emitted in the direction of the corner portion C rather than directly above (the thickness direction of the display panel 12). In this case, the diffusing lens 28 may be formed in the shape shown in FIG. 7, for example. If the diffusing lens 28 is formed as shown in FIG. 7, the light distribution pattern (directional characteristic) of the light emitted from the diffusing lens 28 is as shown in FIG. Specifically, the luminous intensity of the light emitted from the diffusing lens 28 is the highest in the direction inclined by about 65 ± 15 degrees with respect to the upward direction. Further, the relative luminous intensity of the light emitted from the diffusing lens 28 in the directly upward direction is, for example, about 0.2. In addition, the angle (0 degree-90 degree) of FIG. 8 has shown the emission angle of the light with respect to a directly upward direction.

  Note that the diffusing lens 28 may be provided in all of the light emitting elements 21 or may be provided in the light emitting elements 21 other than the light emitting elements 21a without being provided in the light emitting elements 21a mounted on the projecting portions 121a. Good.

  As shown in FIG. 2, the reflection sheet 23 includes a bottom surface portion 23 a disposed on the front surface of the mounting substrate 22 and an inclined surface portion 23 b that is inclined with respect to the bottom surface portion 23 a. The bottom surface portion 23 a is formed in a rectangular shape and is disposed substantially parallel to the display panel 12. The inclined surface portion 23b is bent toward the display panel 12 so as to have a predetermined inclination angle with respect to the bottom surface portion 23a. The light emitted from the light emitting element 21 is reflected to the display panel 12 side by the inclined surface portion 23 b of the reflection sheet 23 at the peripheral portion of the lighting device 20.

  The reflective sheet 23 has a plurality of openings 23c into which the light emitting element 21 and the diffusing lens 28 are inserted. Four openings 23d are formed in front portions of the four light emitting elements 21a in the inclined surface portion 23b. The opening 23d is formed larger than the other opening 23c. The opening 23 may be formed up to the bottom surface 23a. In addition, a notch (not shown) may be formed instead of the opening 23d in the front portion of the four light emitting elements 21a in the inclined surface portion 23b.

  The diffusion plate 24 is made of, for example, a resin plate member. The diffusion plate 24 reflects a part of the light emitted from the light emitting element 21 to the reflection sheet 23 side, diffuses the rest of the light emitted from the light emitting element 21 and transmits it to the display panel 12 side (optical sheet 25 side). It has the function to do. The back surface of the diffusion plate 24 may be supported by a plurality of support pins (not shown). The support pins may be fixed to the back chassis 27 or the mounting substrate 22. The reflection sheet 23 may be provided with an insertion hole (not shown) for inserting a support pin.

  The plurality of optical sheets 25 are made of resin-like sheet-like members thinner than the diffusion plate 24 and are arranged on the display panel 12 side of the diffusion plate 24. The optical sheet 25 diffuses or collects light transmitted through the diffusion plate 24. In addition, the kind and number of the optical sheets 25 to be used can be changed according to the application.

  In the present embodiment, as described above, of the mounting substrate 121 arranged adjacent to the corner portion C of the lighting device 20, the portion near the corner portion C has a protruding portion 121 a protruding toward the corner portion C. And the light emitting element 21a is mounted on the protrusion 121a. That is, the light emitting element 21 a is additionally arranged in the vicinity of the corner portion C (corner region) of the lighting device 20. Thereby, since the quantity of the light radiate | emitted from the corner area | region of the illuminating device 20 can be increased, it can suppress that the brightness | luminance of the corner area | region of the display panel 12 falls (a corner area | region looks dark). Such a configuration is particularly effective for a thin lighting device.

  Further, as described above, the protruding portion 121 a protrudes outward in the A direction from the end surface 122 a in the A direction of the mounting substrate 122 and protrudes outward from the end surface 121 b in the B direction of the mounting substrate 121. That is, the protruding portion 121a protrudes in an oblique direction from a portion near the corner portion C of the mounting substrate 121. Thereby, the light emitting element 21a can be disposed closer to the corner portion C of the lighting device 20.

  As described above, the opening 23d (or notch) is formed in the front portion of the light emitting element 21a mounted on the protruding portion 121a in the inclined surface portion 23b of the reflection sheet 23. Thereby, when the light emitting element 21a is additionally disposed in the vicinity of the corner portion C of the lighting device 20, it is possible to suppress the light emitted from the light emitting element 21a from being blocked by the inclined surface portion 23b of the reflection sheet 23.

  In addition, as described above, the light emitting element 21a mounted on the protruding portion 121a is compared with the light emitting element 21b disposed adjacent to the corner portion C among the plurality of light emitting elements 21 disposed in a matrix. It is arranged near the corner portion C. Thereby, the quantity of the light radiate | emitted from the corner area | region of the illuminating device 20 can be increased easily.

  Further, as described above, the power supplied to the light emitting elements 21a mounted on the protrusions 121a is higher than the power supplied to the other light emitting elements 21. Thereby, since the quantity of the light radiate | emitted from the corner area | region of the illuminating device 20 can be increased more, it can suppress more that the brightness | luminance of the corner area | region of the display panel 12 falls.

  Moreover, since the light from the light emitting element 21 can be diffused by providing the diffusing lens 28 for diffusing the light from the light emitting element 21 as described above, the luminance of the corner area of the display panel 12 is reduced. Can be further suppressed.

  Further, as described above, the diffusing lens 28 increases the light emitted toward the corner portion C rather than directly above. Thereby, it can suppress effectively that the brightness | luminance of the corner area | region of the display panel 12 falls.

(Second Embodiment)
In the second embodiment of the present invention, as shown in FIG. 9, the mounting substrate 121 is formed in an L shape, and the protruding portion 121 a of the mounting substrate 121 protrudes outward from the end surface 121 b in the B direction of the mounting substrate 121. Yes. That is, the protruding portion 121a protrudes in the B direction from a portion near the corner portion C of the mounting substrate 121.

  Other structures of the second embodiment are the same as those of the first embodiment.

  In the present embodiment, as described above, the protruding portion 121a protrudes outward from the end surface 121b of the mounting substrate 121. Even in such a configuration, the light emitting element 21a can be disposed in the vicinity (corner region) of the corner portion C of the lighting device 20, so that the amount of light emitted from the corner region of the lighting device 20 can be increased. it can. For this reason, it can suppress that the brightness | luminance of the corner area | region of the display panel 12 falls.

  Other effects of the second embodiment are the same as those of the first embodiment.

(Third embodiment)
In the third embodiment of the present invention, as shown in FIG. 10, the mounting substrate 121 is formed in a straight line shape, and the protruding portion 121 a of the mounting substrate 121 is outside the A direction end surface 122 a of the mounting substrate 122. Protruding. That is, the protruding portion 121 a protrudes from the portion near the corner portion C of the mounting substrate 121 in the A direction. In the present embodiment, the mounting board 22 includes one type of mounting board 121 and one type of mounting board 122.

  Other structures of the third embodiment are the same as those of the first embodiment.

  In the present embodiment, as described above, the protruding portion 121a protrudes outward in the A direction from the end surface 122a of the mounting substrate 122 in the A direction. Even in such a configuration, the light emitting element 21a can be disposed in the vicinity (corner region) of the corner portion C of the lighting device 20, so that the amount of light emitted from the corner region of the lighting device 20 can be increased. it can. For this reason, it can suppress that the brightness | luminance of the corner area | region of the display panel 12 falls.

  Moreover, if comprised as mentioned above, since the mounting board | substrate 22 can be made into two types, it can suppress that the kind of components increases.

  Other effects of the third embodiment are the same as those of the first embodiment.

  The embodiment disclosed this time should be considered as illustrative in all points and not restrictive. The scope of the present invention is shown not by the above description of the embodiments but by the scope of claims for patent, and further includes all modifications within the meaning and scope equivalent to the scope of claims for patent.

  For example, in the above-described embodiment, an example in which the display panel is applied to a liquid crystal display panel has been described. However, the present invention is not limited thereto, and may be applied to a display panel other than the liquid crystal display panel.

  Moreover, in the said embodiment, although the backlight apparatus which illuminates a display panel was demonstrated as an example of an illuminating device, this invention is applicable not only to this but the illuminating device which illuminates to-be-illuminated members other than a display panel. is there. For example, the present invention can also be applied to a ceiling illumination device provided with a panel (illuminated member), an illumination device that illuminates a sign board (illuminated member) from the back side, and the like. Needless to say, the lighting device is not limited to a rectangular shape.

  In the above embodiment, the light emitting element is configured to emit white light. However, the present invention is not limited to this, and the light emitting element is configured to emit light other than white light. May be.

  In the above embodiment, the present invention has been described with respect to an example in which a diffusion lens is provided so as to cover the light emitting element. However, the present invention is not limited thereto, and a diffusion lens that covers the light emitting element may not be provided. .

  Further, a configuration obtained by appropriately combining the configurations of the above-described embodiments is also included in the technical scope of the present invention.

10 Display device 12 Display panel (illuminated member)
DESCRIPTION OF SYMBOLS 20 Illuminating device 21 Light emitting element 22 Mounting board 23 Reflection sheet 23a Bottom surface part 23b Inclined surface part 23c, 23d Opening part 28 Diffusing lens 121 Mounting board (1st mounting board)
121a protrusion 121b end face 122 mounting substrate (second mounting substrate)
122a End face 210 Blue light emitting chip 211 Light emitter layer 222a, 222b Wiring layer 224 Through hole C Corner portion

Claims (17)

An illumination device for illuminating a member to be illuminated,
A plurality of light emitting elements disposed on the back side of the illuminated member;
A plurality of mounting boards each mounting a plurality of the light emitting elements;
With
The plurality of mounting boards include a first mounting board disposed adjacent to a corner portion of the lighting device, and a second mounting board other than the first mounting board,
A portion of the first mounting substrate in the vicinity of the corner portion is provided with a protruding portion protruding toward the corner portion,
The lighting device, wherein the light emitting element is mounted on the protrusion. The mounting substrate is formed to extend in the first direction,
The lighting device according to claim 1, wherein the protruding portion protrudes outward in the first direction from an end surface in the first direction of the second mounting substrate. The mounting substrate is formed to extend in the first direction,
The lighting device according to claim 1, wherein the protruding portion protrudes outward from an end surface in a second direction intersecting the first direction of the first mounting substrate. Comprising a reflective sheet disposed on the mounting substrate;
The reflection sheet includes a bottom surface portion disposed substantially parallel to the illuminated member, and an inclined surface portion inclined with respect to the bottom surface portion,
The opening part or the notch part is formed in the front part of the light emitting element mounted in the said protrusion part among the said inclined surface parts, The Claim 1 characterized by the above-mentioned. Lighting equipment.   The lighting device according to claim 1, wherein the first mounting board has a larger area than the second mounting board. Except for the light emitting elements mounted on the protrusions, the plurality of light emitting elements are arranged in a matrix,
The light emitting device mounted on the protruding portion is disposed closer to the corner portion than the light emitting device disposed adjacent to the corner portion of the plurality of light emitting devices arranged in the matrix. The lighting device according to any one of claims 1 to 5, wherein the lighting device is provided.   7. The lighting device according to claim 1, wherein the power supplied to the light emitting elements mounted on the projecting portion is higher than the power supplied to the other light emitting elements. The first mounting board includes a plurality of wiring layers,
The light emitting elements mounted on the first mounting substrate are divided into two or more groups according to the supplied power, and are electrically connected to the wiring layers that are different for each group. The lighting device according to any one of claims 1 to 7.   The illumination according to claim 8, wherein the light emitting element mounted on the projecting portion is electrically connected to a wiring layer other than the outermost layer among the plurality of wiring layers through a through hole. apparatus.   The lighting device according to claim 1, wherein the light emitting element includes a white light emitting diode. The white light emitting diode is
A combination of a blue light-emitting chip that emits blue light and a light-emitting layer that is provided around the blue light-emitting chip and has a light emission peak in a yellow region,
Or
A combination of a blue light-emitting chip that emits blue light and a light-emitting layer that is provided around the blue light-emitting chip and has a light emission peak in each of a green region and a red region,
Or
A combination of a blue light emitting chip that emits blue light, a light emitting layer that is provided around the blue light emitting chip and has a light emission peak in a green region, and a red light emitting chip that emits red light,
Or
A combination of a blue light emitting chip that emits blue light, a red light emitting chip that emits red light, and a green light emitting chip that emits green light,
Or
A combination of an ultraviolet light emitting chip that emits ultraviolet light, and a phosphor layer provided around the ultraviolet light emitting chip, each having an emission peak in a blue region, a red region, and a green region,
The lighting device according to claim 10, comprising any combination of:   The light emitting device mounted on the projecting portion is the white light emitting diode including the blue light emitting chip that emits blue light and the light emitting layer having a light emission peak in the yellow region. 11. The illumination device according to 11.   The illuminating device according to any one of claims 1 to 12, further comprising a diffusion lens that is provided so as to cover a light emitting side of the light emitting element and diffuses light from the light emitting element.   The lighting device according to claim 13, wherein the diffusion lens increases light emitted toward the corner portion rather than directly above.   The lighting device according to claim 13 or 14, wherein the diffusion lens is provided in a light emitting element other than the light emitting element mounted on the protruding portion. The lighting device according to any one of claims 1 to 15,
And a display panel that performs display using light from the lighting device.   The display device according to claim 16, wherein the display panel is a liquid crystal display panel using liquid crystal.

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