JP4533352B2 - Light emitting device, display device, and cover mounting member - Google Patents

Description

  The present invention relates to a light emitting device, a display device, and the like, and more particularly to a light emitting device including a solid light emitting element.

  In recent years, for example, in a display device such as a liquid crystal display device typified by a liquid crystal television or a liquid crystal monitor, a backlight device is employed as a light emitting device in order to irradiate light from the back surface or the side surface of the display panel. As this backlight device, there is a so-called direct type in which a light source is arranged on a plane directly under (back) a liquid crystal panel. Also, a so-called edge that illuminates the liquid crystal panel surface by installing a light source only on two sides or one side of a transparent resin light guide plate and reflecting the light incident on the light guide plate by a reflecting portion provided on the back surface of the light guide plate There is a light type. Here, the direct type is excellent in that high luminance can be secured. The edge light type is superior in that it can be made thinner than the direct type.

  As such a backlight device, a fluorescent tube of a hot cathode type or a cold cathode type is generally used. On the other hand, as an alternative to a backlight device using such a fluorescent tube, in recent years, technological development of a backlight device using a light emitting diode (LED), which is one of solid state light emitting elements, as a light source. Is underway.

Here, in the backlight device, for example, a reflector (reflector) that reflects light emitted from the LED toward the observer is provided, for example, the emitted light in the lateral direction is reflected by this reflector, and light is emitted from the upper surface. I am letting. Further, in many cases, a lens is used for the purpose of condensing light emitted from the LED and performing, for example, arbitrary control of light distribution characteristics.
As a prior art described in the publication, a sawtooth lens that refracts light emitted from a light source of an LED is adopted, and light is efficiently coupled to a reflector having a shallow depth and a thin light guide, thereby providing secondary optics. There exists a thing which gives a comparatively big irradiation field to an element (for example, refer to patent documents 1).

JP 2003-8068 A

By the way, in a light emitting device using a solid light emitting element such as an LED, a lens is often attached to the LED as described above. Conventionally, for example, a lens is attached to an LED package case to which an LED is attached using snap fit, friction fit, heat caulking, adhesive bonding, ultrasonic welding, or the like.
However, when these methods are used, many work steps are required, and an increase in manufacturing cost leads to an increase in product cost. In particular, in a backlight device used for, for example, a large-screen liquid crystal television, the number of LEDs to be mounted increases, so the number of lenses to be mounted increases accordingly, and the influence on the manufacturing cost becomes great.

In addition, in a light emitting device using a solid light emitting element such as an LED, as described above, a reflector and a lens are often used in combination.
However, when the lens itself has a function as a reflector, the light emitted from the LED is reflected in the lens to gradually attenuate the amount of light, and irradiate the irradiated object such as a display panel. There was a risk that efficiency would be reduced.
In addition, such a problem uses not only a lens that refracts light emitted from a solid light emitting element such as an LED, but also a cover that protects the solid light emitting element by covering the solid light emitting element, for example. In some cases, it can occur as well.

  The present invention has been made to solve such a technical problem, and an object of the present invention is to make it easy to attach a cover to a solid light-emitting element, and to which the cover is attached. It is to increase the irradiation efficiency of light emitted from the light source.

  For such a purpose, a light-emitting device to which the present invention is applied includes a substrate, a plurality of solid-state light-emitting elements mounted on the substrate, and a plurality of solid-state light-emitting elements mounted on the substrate having light transmittance. A plurality of covers are formed, and a plurality of holes corresponding to mounting positions of the plurality of solid state light emitting elements on the substrate are formed, and the plurality of covers fitted in the plurality of holes are sandwiched between the substrates and mounted on the substrate. A positioning member for positioning the plurality of covers on the plurality of solid state light emitting elements, and a reflecting member provided on the inner walls of the plurality of holes formed in the positioning member.

  In such a light emitting device, the cover has a dome-like shape and is formed at the dome portion having a diameter equal to or smaller than the hole formed in the positioning member and the annular end portion of the dome portion, and is formed on the positioning member. Providing the flange portion having a diameter larger than the hole is preferable in that the cover can be more securely sandwiched between the substrate and the positioning member. Further, if the inner walls of the plurality of holes formed in the positioning member are tapered and the reflecting member is disposed on the tapered surface formed on the inner wall, the light emitted from the solid state light emitting device is used as the reflecting member. It is preferable in that it can be reflected with higher efficiency.

  From another point of view, the present invention is a display device that includes a display panel that displays an image, and a backlight that is directed to the back of the display panel and emits light from the back of the display panel. The light includes a substrate, a solid light emitting element mounted on the substrate, a cover that covers the solid light emitting element that is light-transmissive and mounted on the substrate, and a solid light emitting element that is mounted on the substrate by being fixed to the substrate A fixing member for fixing the cover, and the fixing member includes a reflector that reflects light emitted from the solid state light emitting device through the cover toward the back side of the display panel.

  In such a display device, when the cover is attached to the substrate by the fixing member, if the upper end of the reflector portion is fixed to be equal to or lower than the height of the solid light emitting element, more light is emitted from the solid light emitting element. This is preferable in that it can be supplied to the display panel side. Further, if it further includes a reflective layer provided at a portion facing the back side of the display panel of the fixing member, for example, the light reflected from the display panel after being irradiated on the display panel side is further displayed. This is preferable in that it can be returned to the panel side.

  Further, when viewed from another viewpoint, the present invention is used to attach a plurality of covers having light transmittance and individually covering a plurality of solid light emitting elements to a plurality of solid light emitting elements mounted on a substrate. A cover mounting member, which is formed corresponding to a mounting position of a plurality of solid state light emitting elements on a substrate, and has a base portion formed with a plurality of holes into which a plurality of covers can be individually inserted and locked, and a base portion And a reflecting portion that reflects light emitted from each of the plurality of solid state light emitting elements via a plurality of covers inserted in the plurality of holes.

  In the present invention, each solid state light emitting element includes, for example, both an aspect constituted by only a single light emitting element and an aspect constituted by including a plurality of light emitting elements.

  According to the present invention, it is possible to easily attach the cover to the solid state light emitting device by attaching the cover by sandwiching. In addition, according to the present invention, since the light emitted from the solid light emitting element is reflected outside the cover, it is possible to increase the irradiation efficiency of the light emitted from the solid light emitting element to which the cover is attached.

The best mode for carrying out the present invention (hereinafter referred to as an embodiment) will be described below in detail with reference to the accompanying drawings.
FIG. 1 is a diagram showing an overall configuration of a liquid crystal display device to which the present embodiment is applied. The liquid crystal display device to which the present embodiment is applied includes a liquid crystal display module 50 and a backlight device 10 provided on the back side (lower side in FIG. 1) of the liquid crystal display module 50. In the present embodiment, a direct type backlight device 10 is used.

  The backlight device 10 includes a backlight frame 11 that houses a light emitting unit, and a light emitting module 12 in which a plurality of light emitting diodes (referred to as LEDs in the following description) are arranged. Further, the backlight device 10 is a laminated body of optical films, and a diffusion plate 13 that is a transparent plate (or film) that scatters and diffuses light in order to make the entire surface uniform brightness, and condensing light forward. Prism sheets 14 and 15 which are diffraction grating films having effects are provided. Further, a diffusion / reflection type brightness enhancement film 16 for improving brightness is provided.

  On the other hand, the liquid crystal display module 50 is laminated on a liquid crystal panel 51 as a kind of display panel configured by sandwiching liquid crystal between two glass substrates, and each glass substrate of the liquid crystal panel 51, and the vibration of the light wave is observed. Polarizing plates 52 and 53 for limiting in a certain direction are provided. Further, peripheral members such as a driving LSI (not shown) are also mounted on the liquid crystal display device.

The liquid crystal panel 51 includes various components not shown. For example, two glass substrates are provided with a display electrode (not shown), an active element such as a thin film transistor (TFT), a liquid crystal, a spacer, a sealant, an alignment film, a common electrode, a protective film, a color filter, and the like. .
Note that the structural unit of the backlight device 10 is arbitrarily selected. For example, a unit of only the backlight frame 11 having the light emitting module 12 is referred to as a “backlight device (backlight)” and does not include a laminated body of optical compensation sheets such as the diffusion plate 13 and the prism sheets 14 and 15. There is also a possibility.

  FIG. 2 is a diagram for explaining a partial structure of the backlight device 10. In the example shown in FIG. 2, a direct-type backlight structure in which a light source is placed directly under the back surface of the liquid crystal display module 50 is employed. In this backlight structure, the LED chips are arranged substantially evenly with respect to the entire back surface of the liquid crystal display module 50. Therefore, it is different from a so-called side light type in which a light source is arranged on one or two sides of a light guide plate and light on a uniform surface is obtained by a reflector or a light guide plate.

  The backlight frame 11 forms a housing structure made of, for example, aluminum, magnesium, iron, or a metal alloy containing them. And the polyester film etc. which have the performance of white high reflection, for example are affixed inside the housing | casing structure, and it functions also as a reflector. The casing structure includes a back surface portion corresponding to the size of the liquid crystal display module 50 and side surface portions surrounding the four corners of the back surface portion. In addition, a heat sink structure including cooling fins for exhaust heat may be formed on the back surface portion and the side surface portion as necessary.

  In the example shown in FIG. 2, a plurality of light emitting modules 12 (8 in the example of FIG. 2) as a kind of light emitting device are provided, and each of the light emitting modules 12 is a plurality (one light emitting module in the example of FIG. 2). The two screws 17 are fixed to the backlight frame 11. On each light emitting module 12, a plurality of LED chips 21 as one of solid state light emitting elements are arranged. The plurality of LED chips 21 include a red LED that emits red light, a green LED that emits green light, and a blue LED that emits blue light. The LED chips 21 of these colors are arranged according to a certain rule. By mixing the light emitted from the LED chips 21 of these colors, it is possible to obtain a light source with a wide color reproduction range. Each LED chip 21 may include one or a plurality of single LEDs that emit red, green, or blue as described above. For example, a YAG phosphor may be added to a single LED that emits blue-violet light. A pseudo white light emitting element that emits pseudo white light may be used in combination. Furthermore, it may be configured to include a plurality of LEDs each emitting red, green, and blue, and to emit white light by combining these LEDs. Then, by attaching a plurality of light emitting modules 12 to the backlight frame 11, the LED chips 21 are evenly arranged as a whole of the backlight structure. By using the entire LED chip 21 present in the backlight frame 11, it is possible to provide the backlight device 10 that achieves uniformity in luminance and chromaticity. In the example shown in FIG. 2, a plurality of light emitting modules 12 are provided, but a single light emitting module 12 in which all LED chips 21 used as a light source of a backlight are integrated on one substrate can also be used. .

  Each LED chip 21 disposed on the light emitting module 12 is provided with a lens 30. The lens 30 is fixed so as to cover each LED chip 21. Each lens 30 protects each LED chip 21 and has a function for efficiently and substantially uniformly guiding light emitted from the corresponding LED chip 21 to the liquid crystal display module 50 (see FIG. 1). Yes.

  FIG. 3 is an exploded view for explaining the configuration of the light emitting module 12. The light emitting module 12 includes an LED substrate 20 on which a plurality of LED chips 21 are mounted, a plurality of lenses 30 provided corresponding to the number of LED chips 21, and a lens 30 corresponding to each LED chip 21 on the LED substrate 20. A lens cover 40 used for fixing is provided.

  The LED board 20 which is a kind of board is formed of a printed circuit board based on, for example, a glass epoxy resin, and the LED chip 21 is fixed by soldering, for example. Further, the LED substrate 20 incorporates a circuit for causing each LED chip 21 to emit light. Further, two screw holes 22 corresponding to the attachment positions of the screws 17 are formed through the LED substrate 20. Furthermore, a reflection portion 23 is formed in the vicinity of the mounting portion of the LED chip 21 on the LED substrate 20. This reflection part 23 can be comprised, for example by gold plating, silver plating, or aluminum vapor deposition. In addition to the metal film, the reflection portion 23 can be formed of a so-called white film having high light reflection characteristics in the visible region, such as a resist film or a metal oxide film. The reflection portion 23 can be formed not only in the vicinity of the mounting portion of the LED chip 21 on the LED substrate 20 but also over the entire upper surface of the LED substrate 20.

  In addition, the lens cover 40 functioning as a positioning member, a fixing member, or a cover attachment member has a plurality of positions corresponding to the attachment positions of the lenses 30 on the rectangular cover substrate 41, that is, the attachment positions of the LED chips 21 on the LED substrate 20. The lens hole 42 and the two screw holes 43 corresponding to the mounting position of the screw 17 are formed to penetrate each other. That is, the cover substrate 41 functions as a base portion. The lens cover 40 can be made of a metal such as aluminum, a thermosetting resin such as epoxy, or a thermoplastic resin such as liquid crystal polymer.

4A and 4B are diagrams for explaining a configuration of a lens 30 as an example of a cover. FIG. 4A is a perspective view of the lens 30, FIG. 4B is a top view of the lens 30, and FIG. c) shows a side sectional view of the lens 30, respectively.
This lens 30 has a hemispherical shape in part, and a dome portion 31 having a hollowed out dome shape, and a bulge from the annular end (lower edge end) side of the dome portion toward the outside in the horizontal direction. And a protruding flange portion 32. Therefore, the lens diameter D1 that is the outer diameter of the annular end portion of the dome portion 31 is smaller than the collar diameter D2 that is the outer diameter of the collar portion 32 (D1 <D2). The lens 30 is obtained by processing an epoxy resin by an injection molding method or the like, for example. At this time, the lens 30 has a configuration in which the dome portion 31 and the flange portion 32 are integrated.

  In addition to the epoxy resin described above, the lens 30 can be made of a material having high light transmittance in the visible region, such as a polycarbonate resin, a silicone resin, or an acrylic resin. Moreover, you may comprise not only organic substance but inorganic substances, such as oxide glass, for example. In addition, as a characteristic requested | required of the lens 30 in this Embodiment, heat resistance, long-term stability, etc. other than the light transmission characteristic mentioned above are mentioned, for example. This is a matter required for the backlight device 10 to maintain stable light emission characteristics over a long period of time.

  FIG. 5 is a diagram for explaining a detailed configuration of the lens cover 40. FIG. 5A is a top view of the lens cover 40 viewed from the liquid crystal display module 50 (see FIG. 1) side (enlarged view of the main part). FIG. 5B is a cross-sectional view taken along the line IVb-IVb in FIG. In the present embodiment, the diameter of the lens hole 42 penetratingly formed in the lens cover 40 is formed so as to become narrower from the upper surface side toward the lower surface side. That is, the lower opening diameter d1 on the lower side of the cover substrate 41 is smaller than the upper opening diameter d2 on the upper side of the cover substrate 41 (d1 <d2). The lower opening diameter d1 is set to be not less than the lens diameter D1 of the lens 30 shown in FIG. 4 and less than the collar diameter D2 (D1 ≦ d1 <D2).

  In addition, with such a configuration, an inner wall that expands from the bottom to the top is formed in the lens hole 42 of the lens cover 40. In the present embodiment, a reflector member 44 that functions as a reflecting member or a reflecting portion is formed by attaching a reflecting material to the inner wall of the lens hole 42. That is, the lens cover 40 having the reflector portion 44 has a reflector function. The reflector portion 44 can be made of a metal film such as gold, silver, aluminum, or nickel. In addition to the metal film, the reflector section 44 can be formed of a so-called white film having high light reflection characteristics in the visible region, such as a resist film or a metal oxide film. Further, when a metal plate is adopted as the cover substrate 41 of the lens cover 40, the metal background exposed on the inner wall of the formed lens hole 42 is allowed to function as the reflector portion 44 as it is or by polishing or the like. It is also possible. The reflector portion 44 is preferably formed of a material having a light reflectance of 30% or more in the entire visible region.

  A surface layer 45 that functions as a reflective layer is formed on the upper surface of the lens cover 40. The surface layer 45 has a property of reflecting light in the visible region, and can be formed of the same material as that of the reflector portion 44, for example. At that time, the reflector portion 44 and the surface layer 45 can be simultaneously formed in the same process on the cover substrate 41 in which the lens hole 42 and the screw hole 43 are formed. It is also possible to form the reflector portion 44 and the surface layer 45 by different materials and different processes.

Next, a method for manufacturing the LED substrate 20 will be described. First, an LED substrate 20 on which a plurality (28 in this example) of LED chips 21 are mounted, a plurality (28 in this example) of lenses 30, and a lens cover 40 are prepared.
Next, the lens 30 is inserted into each lens hole 42 provided in the cover substrate 41 of the lens cover 40. At this time, each lens 30 is inserted from the lower part of the cover substrate 41, that is, the side where the outer diameter of the lens hole 42 is narrow (the side where the surface layer 45 is not formed). At this time, since the lens diameter D1 of the lens 30 is equal to or smaller than the lower opening diameter d1 of the lens hole 42, the dome part 31 of the lens 30 passes through the lens hole 42 and protrudes above the cover substrate 41. However, the collar portion 32 of the lens 30 cannot pass through the lens hole 42 because the collar diameter D2 is larger than the lower opening diameter d1 of the lens hole 42, and is locked by the cover substrate 41. As a result, the lens 30 is held by the cover substrate 41.

  Then, after the lenses 30 are inserted and held in all the lens holes 42 provided in the cover substrate 41, the LED substrate 20 is used to press the lens cover 40 from the lower side of the cover substrate 41. At this time, each LED chip 21 provided on the LED substrate 20 is arranged in each lens 30 inserted in each lens hole 42. As a result, each lens 30 has its flange portion 32 sandwiched between the lens cover 40 and the LED substrate 20. In this state, for example, by bonding the lens cover 40 and the LED substrate 20 with an adhesive, each lens 30 can be fixedly arranged on each LED chip 21 mounted on the LED substrate 20. At this time, it is not particularly necessary to bond each lens 30 and the lens cover 40, and it is not particularly necessary to bond each lens 30 and the LED substrate 20. In addition, as an adhesive agent used here, it is also possible to use, for example, an epoxy adhesive or a cyanoacrylate adhesive, and further, for example, a polyolefin thermoplastic resin, or a thermosetting resin such as epoxy or acrylic. Further, in some cases, it may be possible to fix each lens 30 by screwing the lens cover 40 and the LED substrate 20 directly to the backlight frame 11 using the screws 17.

  FIG. 6 is a diagram for explaining an optical path of light emitted from the LED chip 21 provided in the light emitting module 12. In the case of the present embodiment, the LED chip 21 shown in FIG. 6 is one of the red LED that emits red, the green LED that emits green, and the blue LED that emits blue as described above. .

  Further, as can be seen from FIG. 6, when the lens 30 is fixed on the LED substrate 20 with the lens cover 40, the upper end position of the reflector portion 44 provided on the lens cover 40 is lower than the upper end of the LED chip 21. Located in. Further, in the lens cover 40, a notch 41 a is formed on the lower side of the reflector portion 44. The notch 41a has a ring shape corresponding to the collar portion 32 of the lens 30. By fitting the collar portion 32 of the lens 30 into the notch 41a, rattling of the lens 30 at the time of attachment is suppressed. .

Next, light irradiation by the light emitting module 12 manufactured in this way will be described in detail.
When a predetermined current flows through the LED chip 21, the LED chip 21 emits light. And the light radiate | emitted from LED chip 21 spreads in each direction.
Of the emitted light, for example, the light irradiated obliquely upward from the LED chip 21 passes through the dome portion 31 of the lens 30 and is then irradiated to the diffusion plate 13 as it is.

  On the other hand, of the irradiated light, for example, light irradiated in a substantially horizontal direction passes through the dome portion 31 of the lens 30 and then enters the reflector portion 44 provided in the lens cover 40. At this time, the reflector portion 44 is inclined upward because the lens hole 42 is formed in a tapered shape, and the light incident on the reflector portion 44 is reflected by the reflector portion 44, Irradiate upward, that is, the diffusion plate 13.

  Further, among the irradiated light, for example, light irradiated obliquely downward enters the LED substrate 20. Here, in this embodiment, since the reflection part 23 is formed corresponding to the attachment site of the LED chip 21 (see FIG. 3), the light incident on the reflection part 23 on the LED substrate 20 is reflected by the reflection part. After being reflected at 23, the upper part, that is, the diffusion plate 13 is irradiated. In the example illustrated in FIG. 6, the case where the reflected light from the reflection unit 23 is further reflected by the reflector unit 44 is illustrated.

  In addition, much of the light irradiated on the diffusion plate 13 in this way is transmitted through the diffusion plate 13 while being diffused, and is irradiated toward the liquid crystal display module 50. However, a part of the light is reflected by the diffusion plate 13 and returns to the light emitting module 12 side. At this time, a surface layer 45 having a reflection characteristic with respect to visible light is formed on the surface of the lens cover 40, and the light reflected from the diffusion plate 13 is reflected by the surface layer 45 and again enters the diffusion plate 13. It will be irradiated towards.

  As described above, in the present embodiment, the lens cover 40 is used to position and fix each lens 30 with respect to each LED chip 21 on the LED substrate 20. For this reason, compared with the aspect which mounts the lens 30 one by one with respect to each LED chip 21, the attachment operation | work of the lens 30 can be made easy. In the present embodiment, a plurality of lens holes 42 are provided in the cover substrate 41 of the lens cover 40, and the reflector portion 44 is formed on the inner wall of the lens hole 42. Further, the lens hole 42 is tapered so that the reflector portion 44 is directed obliquely upward. As a result, the light emitted from the LED chip 21 passes through the lens 30 and then is reflected by the reflector 44, and the reflected light is irradiated toward the diffusion plate 13 (liquid crystal panel 51). Therefore, it is possible to suppress the attenuation of light due to reflection in the lens 30 as in the conventional case, and it is possible to improve the light irradiation efficiency of each LED chip 21 and thus the backlight device 10.

  Further, in the present embodiment, the lower end position of the reflector portion 44 is made lower than the LED chip 21 so that light emitted obliquely downward from the LED chip 21 can also be reflected. Thereby, each LED chip 21 and by extension, the light irradiation efficiency by the backlight apparatus 10 can be improved more. Furthermore, in the present embodiment, since the surface layer 45 having a high reflectance is provided on the upper surface of the lens cover 40, the light reflected from the diffusion plate 13 after the irradiation can be further reflected again. It becomes possible to further improve the light irradiation efficiency of each LED chip 21 and thus the backlight device 10.

In the present embodiment, the case where the LED chip 21 is employed as the solid-state light emitting element has been described as an example. However, the present invention is not limited to this.
In the present embodiment, the reflector portion 44 is formed directly on the cover substrate 41 itself constituting the lens cover 40. However, the present invention is not limited to this, and the member on which the reflector portion 44 is formed is the cover substrate. You may make it comprise by attaching to 41.
Furthermore, in the present embodiment, the lens 30 is positioned and fixed by sandwiching the collar portion 32 provided on the lens 30 between the LED substrate 20 and the lens cover 40. It is not something that can be done. That is, for example, even in the case of the lens 30 without the collar portion 32, the lens 30 can be positioned and fixed by devising the shape of the lens hole 42 provided in the lens cover 40, for example.

It is a figure which shows the whole structure of the liquid crystal display device with which this Embodiment is applied. It is a figure for demonstrating the structure of a part of backlight apparatus. It is an exploded view for demonstrating the structure of a light emitting module. (a) is a perspective view of the lens, (b) is a top view of the lens, and (c) is a side sectional view of the lens. (a) is a top view (enlarged view of the main part) of the lens cover, and (b) is a cross-sectional view along IVb-IVb of (a). It is a figure for demonstrating the optical path of the light irradiated from a LED chip.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 ... Backlight apparatus, 11 ... Backlight frame, 12 ... Light emission module, 13 ... Diffusing plate, 14, 15 ... Prism sheet, 17 ... Screw, 20 ... LED board, 21 ... LED chip, 22 ... Screw hole, 23 ... Reflection part, 30 ... lens, 31 ... dome part, 32 ... brim part, 40 ... lens cover, 41 ... cover substrate, 42 ... lens hole, 43 ... screw hole, 44 ... reflector part, 45 ... surface layer, 50 ... liquid crystal Display module, D1 ... lens diameter, D2 ... collar diameter, d1 ... lower opening diameter, d2 ... upper opening diameter

Claims (7)

A substrate,
A plurality of solid state light emitting devices mounted on the substrate;
A plurality of covers individually covering the plurality of solid-state light emitting elements mounted on the substrate and having light transmittance;
A plurality of holes corresponding to mounting positions of the plurality of solid state light emitting elements on the substrate are formed, and the plurality of covers fitted in the plurality of holes are sandwiched between the substrate and mounted on the substrate. A positioning member for positioning the plurality of covers on the plurality of solid state light emitting devices;
And a reflecting member provided on an inner wall of the plurality of holes formed in the positioning member. The cover is
A dome having a dome-like shape and having a diameter equal to or smaller than the hole formed in the positioning member;
The light emitting device according to claim 1, further comprising a flange portion formed at an annular end portion of the dome portion and having a diameter larger than the hole formed in the positioning member. Inner walls of the plurality of holes formed in the positioning member are tapered.
The light emitting device according to claim 1, wherein the reflecting member is disposed on a tapered surface formed on the inner wall. A display device that includes a display panel that performs image display and a backlight that is directed to the back side of the display panel and that emits light from the back side of the display panel,
The backlight is
A substrate,
A solid state light emitting device mounted on the substrate;
A cover that covers the solid-state light-emitting element having light transparency and mounted on the substrate;
A fixing member for fixing the cover on the solid state light emitting device mounted on the substrate by being fixed to the substrate;
The display device according to claim 1, wherein the fixing member has a reflector portion that reflects light emitted from the solid state light emitting element through the cover toward a back side of the display panel.   The display device according to claim 4, wherein when the cover is attached to the substrate by the fixing member, the upper end of the reflector portion is fixed to be equal to or lower than the height of the solid state light emitting device.   The display device according to claim 4, further comprising a reflective layer provided on a portion of the fixing member facing the back side of the display panel. A cover mounting member that is used to mount a plurality of covers that individually have light transmission and cover the plurality of solid state light emitting elements individually, with respect to the plurality of solid state light emitting elements mounted on the substrate,
A base portion formed corresponding to a mounting position of the plurality of solid state light emitting elements on the substrate, and formed with a plurality of holes into which the plurality of covers can be individually inserted and locked;
A cover mounting member including a reflecting portion provided on the base portion and reflecting light emitted from each of the plurality of solid state light emitting elements via the plurality of covers inserted into the plurality of holes.

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