WO2021210258A1 - Planar illumination device - Google Patents

Planar illumination device Download PDF

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Publication number
WO2021210258A1
WO2021210258A1 PCT/JP2021/005451 JP2021005451W WO2021210258A1 WO 2021210258 A1 WO2021210258 A1 WO 2021210258A1 JP 2021005451 W JP2021005451 W JP 2021005451W WO 2021210258 A1 WO2021210258 A1 WO 2021210258A1
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Prior art keywords
light
frame
lighting device
shielding component
planar lighting
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PCT/JP2021/005451
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French (fr)
Japanese (ja)
Inventor
友晶 森下
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ミネベアミツミ株式会社
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Publication of WO2021210258A1 publication Critical patent/WO2021210258A1/en

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S2/00—Systems of lighting devices, not provided for in main groups F21S4/00 - F21S10/00 or F21S19/00, e.g. of modular construction

Definitions

  • the present invention relates to a planar lighting device.
  • a planar lighting device used as a backlight for a liquid crystal display device is known.
  • a defect may be provided due to a space in which other parts added for functions other than lighting are arranged (see, for example, Patent Documents 1, 2, etc.). ..
  • a defective portion may be provided on the outer peripheral end side of the frame in order to mount a camera for monitoring the line of sight of a driver or the like as another component. ..
  • the presence of the defective portion affects not only the shape of the frame but also the shape of the outer peripheral end portion side of the injection-molded part made of resin such as spacers and reflectors arranged inside the planar lighting device.
  • the outer peripheral end portion side of the injection-molded part made of resin such as spacers and reflectors arranged inside the planar lighting device.
  • deformation occurs due to molding shrinkage caused by the recess, which causes a problem of mold release.
  • problems such as the occurrence of a problem and a decrease in dimensional accuracy.
  • the present invention has been made in view of the above, and an object of the present invention is to provide a planar lighting device that can be easily manufactured even when a defective portion is provided on the outer peripheral end portion side of the frame.
  • the planar lighting device includes a frame and a light-shielding component.
  • the frame is provided with a defect portion formed of a hole having a closed outer circumference on the outer peripheral end side on which other parts are arranged.
  • the light-shielding component has a cylindrical shape, is arranged in the defective portion, and surrounds the hole portion.
  • planar lighting device according to one aspect of the present invention can be easily manufactured even when the defective portion is provided on the outer peripheral end portion side of the frame.
  • FIG. 1 is an external perspective view of the planar lighting device according to the embodiment.
  • FIG. 2 is an external perspective view of the planar lighting device of FIG. 1 as viewed from the back surface side.
  • FIG. 3 is an exploded perspective view of a main part of the planar lighting device.
  • FIG. 4 is a diagram showing a state in which a fixing member and a light-shielding component are attached to the bottom frame.
  • FIG. 5 is a diagram showing a state in which a fixing member and a light-shielding component are attached to the bottom frame.
  • FIG. 6 is an external perspective view showing an example of the reflector.
  • FIG. 7 is an external perspective view showing an example of the spacer.
  • FIG. 1 is an external perspective view of the planar lighting device according to the embodiment.
  • FIG. 2 is an external perspective view of the planar lighting device of FIG. 1 as viewed from the back surface side.
  • FIG. 3 is an exploded perspective view of a main part of the planar lighting device.
  • FIG. 8 is a diagram showing a state in which another member is attached to the bottom frame in the comparative example.
  • FIG. 9 is a diagram showing a state in which another member is attached to the bottom frame.
  • FIG. 10 is an external perspective view showing an example of a reflector in a comparative example.
  • FIG. 11 is an external perspective view showing an example of the spacer in the comparative example.
  • FIG. 12 is a diagram showing an example in which the vicinity of the defective portion of the planar lighting device becomes dark.
  • FIG. 1 is an external perspective view of the planar lighting device 1 according to the embodiment
  • FIG. 2 is an external perspective view of the planar lighting device 1 of FIG. 1 as viewed from the back surface side.
  • the longitudinal direction of the planar illumination device 1 is the X-axis direction
  • the lateral direction is the Y-axis direction
  • the thickness direction is the Z-axis direction.
  • a direct-type planar illumination device in which a plurality of light sources are arranged two-dimensionally along the emission surface will be described as an example, light enters from the side surface of the light guide plate and emits light from one main surface of the light guide plate. The same can be applied to an edge light type planar lighting device.
  • the planar lighting device 1 has a substantially rectangular shape (may be a substantially square shape) and has a substantially plate-like outer shape, and has a floor box-shaped bottom frame 2 for accommodating a substrate or the like described later.
  • the housing is composed of a top frame 16 that covers the opening side of the bottom frame 2.
  • the top frame 16 is provided with an exit surface 1a by a substantially rectangular opening so that light is emitted from the inside to the outside of the planar illumination device 1.
  • a light-shielding component 4 arranged in a defective portion 1b where other components such as a camera are arranged is provided, and the light-shielding component 4 is provided by an edge portion 16a of the top frame 16.
  • the exit surface 1a side is covered.
  • the defective portion 1b is composed of a rectangular hole portion having a closed outer periphery, and a cylindrical light-shielding component 4 is arranged in the hole portion.
  • the light-shielding component 4 is made of, for example, a resin.
  • the hole portion of the defective portion 1b is not limited to a rectangular shape, and can be changed according to the parts to be arranged, the design, and the like, such as a circular shape, an elliptical shape, and a triangular shape.
  • a boss portion 2f for mounting is provided on the back surface side of the bottom frame 2, and a connector 6b for electrical connection is provided.
  • the bottom frame 2 and the top frame 16 are formed of die casting, sheet metal, or the like.
  • FIG. 3 is an exploded perspective view of the main part of the planar lighting device 1, and is a view seen from the exit surface side as in FIG. 1.
  • the planar illumination device 1 includes a fixing member 3, a light-shielding component 4, a substrate 6 on which a light source 7 is arranged, a reflector 9, a lens 11, a spacer 13, and a spacer 13 with respect to the bottom frame 2.
  • the optical sheet 15A to the optical sheet 15C are attached, and the top frame 16 covers the lid.
  • FIG. 4 is a diagram showing a state in which the fixing member 3 and the light-shielding component 4 are attached to the bottom frame 2.
  • the bottom frame 2 has a substantially rectangular bottom portion 2a and side walls 2b on four sides surrounding the bottom portion 2a.
  • a fixing member 3 made of a substantially rectangular frame-shaped double-sided tape or the like is attached so as to surround the hole 2c (corresponding to the defective portion 1b) provided on the outer peripheral end side of the bottom portion 2a, and a cylindrical shape is formed on the fixing member 3.
  • the end face of the light-shielding component 4 is attached and fixed.
  • the bottom frame 2 is provided with a plurality of holes 2d to which the boss portion 2f (FIG. 2) is fixed and holes 2e to expose the connector 6b on the substrate 6.
  • FIG. 5 is a diagram showing a state in which the fixing member 3 and the light-shielding component 4 are attached to the bottom frame 2.
  • the substrate 6 is fixed to the inner bottom portion (2a) of the bottom frame 2 via a fixing member (not shown) using a sheet-shaped double-sided tape or the like.
  • Light sources 7 using a plurality of (many) LEDs (Light Emitting Diodes) or the like are arranged two-dimensionally on the substrate 6.
  • a recess 6a is formed on the outer peripheral end side (upper end side in the drawing) of the substrate 6 so as to avoid the light-shielding component 4.
  • the reflector 9 is fixed between the light sources 7 of the substrate 6 via a fixing member (not shown) made of a plurality of strip-shaped double-sided tapes extending in the vertical direction in the figure.
  • the reflector 9 is for reflecting the light emitted from the light source 7 in the normal direction of the exit surface to increase the brightness.
  • FIG. 6 is an external perspective view showing an example of the reflector 9.
  • a plurality of (many) unit reflectors 9b are provided on the substantially rectangular reflector main body 9a.
  • the unit reflector 9b has a substantially rectangular hole in which the light source 7 is arranged with its head protruding, and four inclined reflecting surfaces that surround the hole and open toward the exit surface side.
  • a substantially rectangular hole portion 9c through which the light-shielding component 4 (FIGS. 3 to 5) is inserted is formed on the outer peripheral end portion side of the reflector 9, and the outer peripheral end portion side of the hole portion 9c is an end portion. Is a continuous connecting shape 9d.
  • the reflector 9 is manufactured by injection molding of a resin or the like.
  • the lens 11 is fixed to the upper end side of the reflector 9 via a fixing member (not shown) made of a plurality of strip-shaped double-sided tapes or the like.
  • the lens 11 is for adjusting the light distribution and brightness of the light emitted from the reflector 9.
  • Two convex portions 11a for maintaining a distance from the optical sheet 15A are provided near the center of the lens 11.
  • a spacer 13 is fixed to the vicinity of the upper, lower, left, and right ends of the lens 11 via a fixing member (not shown) made of a plurality of strip-shaped double-sided tapes or the like.
  • FIG. 7 is an external perspective view showing an example of the spacer 13.
  • the spacer 13 is composed of a substantially rectangular frame-shaped spacer main body 13a, and a portion adjacent to the light-shielding component 4 (FIGS. 3 to 5) has a connecting shape 13b having continuous ends.
  • the spacer 13 is manufactured by injection molding of a resin or the like.
  • the optical sheets 15A to 15C are fixed to the upper end side of the spacer 13 via a fixing member (not shown) made of a plurality of strip-shaped double-sided tapes or the like.
  • the fixing member is provided with a step, and the ear portions 15a to 15c of the optical sheets 15A to 15C are fixed to the spacer 13 without overlapping via the fixing member.
  • the optical sheets 15A to 15C adjust the light distribution and brightness of the passing light, and are a diffusion sheet (diffuse film), a prism sheet (prism film), a brightness improvement sheet (brightness improvement film), and a louver sheet (louver film). ) Etc.
  • the top frame 16 is arranged on the exit surface side of the optical sheet 15C, and the top frame 16 is fixed to the bottom frame 2.
  • FIG. 8 is a diagram showing a state in which another member 4'is attached to the bottom frame 2'in the comparative example.
  • a recess 2a' is provided on the outer peripheral end side of the bottom frame 2'corresponding to a defective portion on which other parts such as a camera are arranged, and a separate member 4'is a recess 2a'. Is fixed to.
  • the separate member 4' has a portion that becomes a wall surrounding the defective portion and a portion for fixing the bottom portion of the bottom frame 2', and is integrally formed of sheet metal or the like.
  • FIG. 9 is a diagram showing a state in which another member 4'is attached to the bottom frame 2'.
  • a hole 2c is provided corresponding to a defective portion in which other parts such as a camera are arranged, and the hole 2c is provided with a hole 2c. Since the light-shielding component 4 is only fixed via the fixing member 3, the cost of the frame component does not increase significantly as compared with the case of the normal shape having no defective portion. In addition, since caulking is not required, there is no problem of pollution, and there is no need to increase the cost for pollution control.
  • FIG. 10 is an external perspective view showing an example of the reflector 9'in the comparative example.
  • a recess 9a'that avoids another member 4'attached to the bottom frame 2'(FIGS. 8 and 9) is provided on the outer peripheral end side of the reflector 9'of the comparative example.
  • FIG. 11 is an external perspective view showing an example of the spacer 13'in the comparative example.
  • a recess 13a'that avoids another member 4'attached to the bottom frame 2'(FIGS. 8 and 9) is provided on the outer peripheral end side of the spacer 13'of the comparative example.
  • the reflector 9'and the spacer 13' are generally manufactured by injection molding with a resin, but the recesses 9a'and 13a' cause deformation due to molding shrinkage, which may cause a problem in mold release. , Problems such as deterioration of dimensional accuracy occur.
  • the light-shielding component 4 provided corresponding to the defective portion where other components such as a camera are arranged is surrounded.
  • the connecting shapes 9d and 13b are provided, and no recess is formed at the end of the reflector 9 or the spacer 13. Therefore, deformation does not occur due to molding shrinkage due to the concave portion, and problems such as a problem in mold release and a decrease in dimensional accuracy do not occur.
  • FIG. 12 is a diagram showing an example in which the vicinity of the defective portion of the planar lighting device 1 becomes dark.
  • the light-shielding component 4 when it is required to block light so that light does not enter the camera, such as when another component is a camera, and when it is desired to brighten the periphery of the light-shielding component 4, the light-shielding component 4 is molded in two colors or colored.
  • the inside of the camera can be black and the outside can be white.
  • the defective portion and the light-shielding component are substantially rectangular when viewed from the emission direction. This facilitates positioning during assembly.
  • a black low-reflection material is used when the periphery of the defect is to be darkened, and a white high-reflection material is used when the periphery of the defect is to be brightened.
  • the light-shielding parts are set to the same color or different colors on the inner and outer surfaces. As a result, it is possible to achieve both the light shielding inside the light-shielding component and the requirement for the external brightness.
  • the present invention is not limited by the above-described embodiment.
  • the present invention also includes a configuration in which the above-mentioned components are appropriately combined. Further, further effects and modifications can be easily derived by those skilled in the art. Therefore, the broader aspect of the present invention is not limited to the above-described embodiment, and various modifications can be made.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Planar Illumination Modules (AREA)

Abstract

A planar illumination device (1) according to an embodiment comprises a frame (2, 16) and a light shielding component (4). The frame (2, 16) has a deficient part (1b) for arranging other components therein, the deficient part being provided on an outer peripheral end side of the frame and constituted by a hole with a closed outer periphery. The light shielding component (4) has a cylindrical shape, is arranged in the deficient part (1b) and surrounds the hole.

Description

面状照明装置Planar lighting device
　本発明は、面状照明装置に関する。 The present invention relates to a planar lighting device.
　液晶表示装置のバックライト等として用いられる面状照明装置が知られている。この種の面状照明装置では、照明以外の機能のために追加される他の部品が配置されるスペースのために欠損部が設けられることがある（例えば、特許文献１、２等を参照）。例えば、自動車に搭載される液晶表示装置のバックライトでは、他の部品として、運転手等の視線監視用のカメラの搭載のために、フレームの外周端部側に欠損部が設けられる場合がある。 A planar lighting device used as a backlight for a liquid crystal display device is known. In this type of planar lighting device, a defect may be provided due to a space in which other parts added for functions other than lighting are arranged (see, for example, Patent Documents 1, 2, etc.). .. For example, in the backlight of a liquid crystal display device mounted on an automobile, a defective portion may be provided on the outer peripheral end side of the frame in order to mount a camera for monitoring the line of sight of a driver or the like as another component. ..
　このように、フレームの外周端部側に欠損部が設けられる場合（欠損部のない通常形状に対して異形形状と呼ぶ場合がある）、他の部品を安定して配置できるスペースを確保するとともに、欠損部からゴミ等が侵入しないための対策や、照明光が不用意に漏れてユーザに違和感を与えたり、照明の効率低下をきたしたり、他の部品に影響を与えたりするのを防ぐための遮光の対策等が必要となる。一般的には、他の部品を囲う部分をフレームから絞り加工等で一体に形成することは困難であるため、フレームの外周壁から内部にかけて他の部品を囲う別部材を用意し、別部材をカシメ等によってフレームに固定することが多い。 In this way, when a defective portion is provided on the outer peripheral end side of the frame (sometimes referred to as a deformed shape as opposed to a normal shape without a defective portion), a space for stably arranging other parts is secured. , To prevent dust from entering from the defective part, and to prevent the lighting light from leaking carelessly, giving the user a sense of discomfort, reducing the efficiency of the lighting, and affecting other parts. It is necessary to take measures such as shading. In general, it is difficult to integrally form the part that surrounds other parts from the frame by drawing, etc., so prepare another member that surrounds the other parts from the outer peripheral wall of the frame to the inside, and use another member. It is often fixed to the frame by caulking or the like.
特開２０２０－２４８００号公報Japanese Unexamined Patent Publication No. 2020-24800 特開２０１８－７７９５４号公報JP-A-2018-77954
　しかしながら、上述した対策では、フレームの製作に複雑な形状の別部材が必要となり、フレーム用部品の成立が困難となって、フレーム用部品のコストが、欠損部のない通常形状の場合と比較して大きく上昇してしまう可能性がある。また、金属のフレームに対する金属部品の固定にはカシメが用いられる場合が多いが、フレームに別部材をカシメにより固定する場合、カシメ残りの異物発生による汚染（コンタミネーション）が発生しやすくなり、その対策のための更なるコストアップも予想される。 However, with the above-mentioned measures, a separate member having a complicated shape is required to manufacture the frame, which makes it difficult to establish a frame part, and the cost of the frame part is higher than that of a normal shape without a defect. There is a possibility that it will rise significantly. In addition, caulking is often used to fix metal parts to a metal frame, but when another member is fixed to the frame by caulking, contamination due to the generation of foreign matter remaining in the caulking is likely to occur. Further cost increases for countermeasures are expected.
　更に、欠損部の存在は、フレームだけではなく、面状照明装置の内部に配置されるスペーサやリフレクタ等の樹脂による射出成型部品の外周端部側の形状にも影響することとなる。例えば、スペーサやリフレクタ等の外周端部側には、フレームの欠損部に取り付けられた別部材を避ける凹部が必要となることから、その凹部に起因した成型収縮により変形が生じ、離型に問題が生じたり、寸法精度が低下したりするといった問題も発生する。 Furthermore, the presence of the defective portion affects not only the shape of the frame but also the shape of the outer peripheral end portion side of the injection-molded part made of resin such as spacers and reflectors arranged inside the planar lighting device. For example, since a recess is required on the outer peripheral end side of the spacer, reflector, etc. to avoid another member attached to the defective portion of the frame, deformation occurs due to molding shrinkage caused by the recess, which causes a problem of mold release. There are also problems such as the occurrence of a problem and a decrease in dimensional accuracy.
　本発明は、上記に鑑みてなされたものであって、欠損部がフレームの外周端部側に設けられる場合であっても製造が容易な面状照明装置を提供することを目的とする。 The present invention has been made in view of the above, and an object of the present invention is to provide a planar lighting device that can be easily manufactured even when a defective portion is provided on the outer peripheral end portion side of the frame.
　上述した課題を解決し、目的を達成するために、本発明の一態様に係る面状照明装置は、フレームと、遮光部品とを備える。前記フレームは、他の部品が配置される、外周が閉じた孔部から構成される欠損部が外周端部側に設けられる。前記遮光部品は、筒状であり、前記欠損部に配置され、前記孔部を包囲する。 In order to solve the above-mentioned problems and achieve the object, the planar lighting device according to one aspect of the present invention includes a frame and a light-shielding component. The frame is provided with a defect portion formed of a hole having a closed outer circumference on the outer peripheral end side on which other parts are arranged. The light-shielding component has a cylindrical shape, is arranged in the defective portion, and surrounds the hole portion.
　本発明の一態様に係る面状照明装置は、欠損部がフレームの外周端部側に設けられる場合であっても製造が容易となる。 The planar lighting device according to one aspect of the present invention can be easily manufactured even when the defective portion is provided on the outer peripheral end portion side of the frame.
図１は、一実施形態にかかる面状照明装置の外観斜視図である。FIG. 1 is an external perspective view of the planar lighting device according to the embodiment. 図２は、図１の面状照明装置を裏面側から見た外観斜視図である。FIG. 2 is an external perspective view of the planar lighting device of FIG. 1 as viewed from the back surface side. 図３は、面状照明装置の主要部の分解斜視図である。FIG. 3 is an exploded perspective view of a main part of the planar lighting device. 図４は、ボトムフレームに対して固定部材および遮光部品が取り付けられる状態を示す図である。FIG. 4 is a diagram showing a state in which a fixing member and a light-shielding component are attached to the bottom frame. 図５は、ボトムフレームに対して固定部材および遮光部品が取り付けられた状態を示す図である。FIG. 5 is a diagram showing a state in which a fixing member and a light-shielding component are attached to the bottom frame. 図６は、リフレクタの一例を示す外観斜視図である。FIG. 6 is an external perspective view showing an example of the reflector. 図７は、スペーサの一例を示す外観斜視図である。FIG. 7 is an external perspective view showing an example of the spacer. 図８は、比較例においてボトムフレームに対して別部材が取り付けられる状態を示す図である。FIG. 8 is a diagram showing a state in which another member is attached to the bottom frame in the comparative example. 図９は、ボトムフレームに対して別部材が取り付けられた状態を示す図である。FIG. 9 is a diagram showing a state in which another member is attached to the bottom frame. 図１０は、比較例におけるリフレクタの一例を示す外観斜視図である。FIG. 10 is an external perspective view showing an example of a reflector in a comparative example. 図１１は、比較例におけるスペーサの一例を示す外観斜視図である。FIG. 11 is an external perspective view showing an example of the spacer in the comparative example. 図１２は、面状照明装置の欠損部の付近が暗くなる例を示す図である。FIG. 12 is a diagram showing an example in which the vicinity of the defective portion of the planar lighting device becomes dark.
　以下、実施形態に係る面状照明装置について図面を参照して説明する。なお、この実施形態によりこの発明が限定されるものではない。また、図面における各要素の寸法の関係、各要素の比率などは、現実と異なる場合がある。図面の相互間においても、互いの寸法の関係や比率が異なる部分が含まれている場合がある。また、１つの実施形態や変形例に記載された内容は、原則として他の実施形態や変形例にも同様に適用される。 Hereinafter, the planar lighting device according to the embodiment will be described with reference to the drawings. The present invention is not limited to this embodiment. In addition, the relationship between the dimensions of each element in the drawing, the ratio of each element, and the like may differ from the reality. Even between drawings, there may be parts where the relationship and ratio of dimensions are different from each other. Further, in principle, the contents described in one embodiment or modification are similarly applied to other embodiments or modifications.
　図１は、一実施形態にかかる面状照明装置１の外観斜視図であり、図２は、図１の面状照明装置１を裏面側から見た外観斜視図である。図においては、便宜上、面状照明装置１の長手方向をＸ軸方向、短手方向をＹ軸方向、厚み方向をＺ軸方向としている。なお、出射面に沿って２次元に複数の光源が配置される直下型の面状照明装置を例として説明するが、導光板の側面から入光し、導光板の一方の主面から出光するエッジライト型の面状照明装置にも同様に適用することができる。 FIG. 1 is an external perspective view of the planar lighting device 1 according to the embodiment, and FIG. 2 is an external perspective view of the planar lighting device 1 of FIG. 1 as viewed from the back surface side. In the figure, for convenience, the longitudinal direction of the planar illumination device 1 is the X-axis direction, the lateral direction is the Y-axis direction, and the thickness direction is the Z-axis direction. Although a direct-type planar illumination device in which a plurality of light sources are arranged two-dimensionally along the emission surface will be described as an example, light enters from the side surface of the light guide plate and emits light from one main surface of the light guide plate. The same can be applied to an edge light type planar lighting device.
　図１および図２において、面状照明装置１は、略長方形（略正方形でも可）で略板状の外形をしており、後述する基板等を収容する有床箱状のボトムフレーム２と、ボトムフレーム２の開口側を覆うトップフレーム１６とから筐体が構成されている。トップフレーム１６には略矩形状の開口部により出射面１ａが設けられており、面状照明装置１の内部から外部に向かって光が照射されるようになっている。 In FIGS. 1 and 2, the planar lighting device 1 has a substantially rectangular shape (may be a substantially square shape) and has a substantially plate-like outer shape, and has a floor box-shaped bottom frame 2 for accommodating a substrate or the like described later. The housing is composed of a top frame 16 that covers the opening side of the bottom frame 2. The top frame 16 is provided with an exit surface 1a by a substantially rectangular opening so that light is emitted from the inside to the outside of the planar illumination device 1.
　また、面状照明装置１の外周端部側にはカメラ等の他の部品が配置される欠損部１ｂに配置される遮光部品４が設けられ、遮光部品４はトップフレーム１６の縁部１６ａによって出射面１ａ側が覆われている。欠損部１ｂは、外周が閉じた矩形状の孔部から構成されており、その孔部に筒状の遮光部品４が配置されている。遮光部品４は、例えば、樹脂によって形成されている。なお、欠損部１ｂの孔部は矩形に限られず、円形、楕円形、三角形等、配置される部品やデザイン等に応じて変更が可能である。 Further, on the outer peripheral end side of the planar lighting device 1, a light-shielding component 4 arranged in a defective portion 1b where other components such as a camera are arranged is provided, and the light-shielding component 4 is provided by an edge portion 16a of the top frame 16. The exit surface 1a side is covered. The defective portion 1b is composed of a rectangular hole portion having a closed outer periphery, and a cylindrical light-shielding component 4 is arranged in the hole portion. The light-shielding component 4 is made of, for example, a resin. The hole portion of the defective portion 1b is not limited to a rectangular shape, and can be changed according to the parts to be arranged, the design, and the like, such as a circular shape, an elliptical shape, and a triangular shape.
　ボトムフレーム２の裏面側には、取付用のボス部２ｆが設けられるとともに、電気的な接続のためのコネクタ６ｂが設けられている。ボトムフレーム２やトップフレーム１６は、ダイカストや板金等により形成されている。車載用のナビゲーション装置やインジケータ等のバックライトとして面状照明装置１が用いられる場合、液晶表示装置等は出射面１ａの側に装着される。 On the back surface side of the bottom frame 2, a boss portion 2f for mounting is provided, and a connector 6b for electrical connection is provided. The bottom frame 2 and the top frame 16 are formed of die casting, sheet metal, or the like. When the planar lighting device 1 is used as a backlight for an in-vehicle navigation device, an indicator, or the like, the liquid crystal display device or the like is mounted on the exit surface 1a side.
　図３は、面状照明装置１の主要部の分解斜視図であり、図１と同様に出射面側から見た図である。図３において、面状照明装置１には、ボトムフレーム２に対して、固定部材３および遮光部品４と、光源７が配置された基板６と、リフレクタ９と、レンズ１１と、スペーサ１３と、光学シート１５Ａ～光学シート１５Ｃとが取り付けられ、トップフレーム１６により蓋をされる形となる。 FIG. 3 is an exploded perspective view of the main part of the planar lighting device 1, and is a view seen from the exit surface side as in FIG. 1. In FIG. 3, the planar illumination device 1 includes a fixing member 3, a light-shielding component 4, a substrate 6 on which a light source 7 is arranged, a reflector 9, a lens 11, a spacer 13, and a spacer 13 with respect to the bottom frame 2. The optical sheet 15A to the optical sheet 15C are attached, and the top frame 16 covers the lid.
　図４は、ボトムフレーム２に対して固定部材３および遮光部品４が取り付けられる状態を示す図である。図４において、ボトムフレーム２は、略矩形状の底部２ａと、この底部２ａの周囲を囲む４辺の側壁２ｂとを有している。そして、底部２ａの外周端部側に設けられた孔部２ｃ（欠損部１ｂに対応）を囲むように略矩形枠状の両面テープ等による固定部材３が貼り付けられ、その上に筒状の遮光部品４の端面が貼り付けられて固定される。なお、ボトムフレーム２には、ボス部２ｆ（図２）が固定される複数の孔部２ｄや、基板６上のコネクタ６ｂが露出する孔部２ｅが設けられている。図５は、ボトムフレーム２に対して固定部材３および遮光部品４が取り付けられた状態を示す図である。 FIG. 4 is a diagram showing a state in which the fixing member 3 and the light-shielding component 4 are attached to the bottom frame 2. In FIG. 4, the bottom frame 2 has a substantially rectangular bottom portion 2a and side walls 2b on four sides surrounding the bottom portion 2a. Then, a fixing member 3 made of a substantially rectangular frame-shaped double-sided tape or the like is attached so as to surround the hole 2c (corresponding to the defective portion 1b) provided on the outer peripheral end side of the bottom portion 2a, and a cylindrical shape is formed on the fixing member 3. The end face of the light-shielding component 4 is attached and fixed. The bottom frame 2 is provided with a plurality of holes 2d to which the boss portion 2f (FIG. 2) is fixed and holes 2e to expose the connector 6b on the substrate 6. FIG. 5 is a diagram showing a state in which the fixing member 3 and the light-shielding component 4 are attached to the bottom frame 2.
　図３に戻り、ボトムフレーム２の内側の底部（２ａ）には、シート状の両面テープ等による固定部材（図示せず）を介して基板６が固定される。基板６上には、複数（多数）のＬＥＤ（Light　Emitting　Diode）等による光源７が２次元に配置されている。基板６の外周端部側（図における上側の端部側）には、遮光部品４を避けるように凹部６ａが形成されている。 Returning to FIG. 3, the substrate 6 is fixed to the inner bottom portion (2a) of the bottom frame 2 via a fixing member (not shown) using a sheet-shaped double-sided tape or the like. Light sources 7 using a plurality of (many) LEDs (Light Emitting Diodes) or the like are arranged two-dimensionally on the substrate 6. A recess 6a is formed on the outer peripheral end side (upper end side in the drawing) of the substrate 6 so as to avoid the light-shielding component 4.
　基板６の光源７の間には図の縦方向に延びる短冊状の複数の両面テープ等による固定部材（図示せず）を介してリフレクタ９が固定される。リフレクタ９は、光源７から放出される光を出射面の法線方向に反射し、輝度を高めるためのものである。 The reflector 9 is fixed between the light sources 7 of the substrate 6 via a fixing member (not shown) made of a plurality of strip-shaped double-sided tapes extending in the vertical direction in the figure. The reflector 9 is for reflecting the light emitted from the light source 7 in the normal direction of the exit surface to increase the brightness.
　図６は、リフレクタ９の一例を示す外観斜視図である。図６において、略矩形状のリフレクタ本体９ａには、複数（多数）の単位リフレクタ９ｂが設けられている。単位リフレクタ９ｂは、光源７が頭を出して配置される略矩形の孔部と、その孔部を取り囲む、出射面側に向けて開く傾斜した４個の反射面とを有している。また、リフレクタ９の外周端部側には、遮光部品４（図３～図５）が挿通される略矩形状の孔部９ｃが形成されており、孔部９ｃの外周端部側は端部が連続した繋ぎ形状９ｄとなっている。リフレクタ９は、樹脂の射出成型等により製造される。 FIG. 6 is an external perspective view showing an example of the reflector 9. In FIG. 6, a plurality of (many) unit reflectors 9b are provided on the substantially rectangular reflector main body 9a. The unit reflector 9b has a substantially rectangular hole in which the light source 7 is arranged with its head protruding, and four inclined reflecting surfaces that surround the hole and open toward the exit surface side. Further, a substantially rectangular hole portion 9c through which the light-shielding component 4 (FIGS. 3 to 5) is inserted is formed on the outer peripheral end portion side of the reflector 9, and the outer peripheral end portion side of the hole portion 9c is an end portion. Is a continuous connecting shape 9d. The reflector 9 is manufactured by injection molding of a resin or the like.
　図３に戻り、リフレクタ９の図における上端部側には短冊状の複数の両面テープ等による固定部材（図示せず）を介してレンズ１１が固定される。レンズ１１は、リフレクタ９から出射される光の配光や輝度を調整するためのものである。レンズ１１の中央付近には、光学シート１５Ａとの間隔を維持するための２つの凸部１１ａが設けられている。 Returning to FIG. 3, the lens 11 is fixed to the upper end side of the reflector 9 via a fixing member (not shown) made of a plurality of strip-shaped double-sided tapes or the like. The lens 11 is for adjusting the light distribution and brightness of the light emitted from the reflector 9. Two convex portions 11a for maintaining a distance from the optical sheet 15A are provided near the center of the lens 11.
　レンズ１１の上下左右の端部付近には、短冊状の複数の両面テープ等による固定部材（図示せず）を介してスペーサ１３が固定される。 A spacer 13 is fixed to the vicinity of the upper, lower, left, and right ends of the lens 11 via a fixing member (not shown) made of a plurality of strip-shaped double-sided tapes or the like.
　図７は、スペーサ１３の一例を示す外観斜視図である。図７において、スペーサ１３は、略矩形の枠状のスペーサ本体１３ａから構成され、遮光部品４（図３～図５）と隣接する部分は、端部が連続した繋ぎ形状１３ｂとなっている。スペーサ１３は、樹脂の射出成型等により製造される。 FIG. 7 is an external perspective view showing an example of the spacer 13. In FIG. 7, the spacer 13 is composed of a substantially rectangular frame-shaped spacer main body 13a, and a portion adjacent to the light-shielding component 4 (FIGS. 3 to 5) has a connecting shape 13b having continuous ends. The spacer 13 is manufactured by injection molding of a resin or the like.
　図３に戻り、スペーサ１３の図における上端部側には短冊状の複数の両面テープ等による固定部材（図示せず）を介して光学シート１５Ａ～１５Ｃが固定される。固定部材には、段差が設けられており、光学シート１５Ａ～１５Ｃの耳部１５ａ～１５ｃが固定部材を介して重ならずにスペーサ１３にそれぞれ固定される。光学シート１５Ａ～１５Ｃは、通過する光の配光や輝度を調整するものであり、拡散シート（拡散フィルム）、プリズムシート（プリズムフィルム）、輝度向上シート（輝度向上フィルム）、ルーバーシート（ルーバーフィルム）等である。 Returning to FIG. 3, the optical sheets 15A to 15C are fixed to the upper end side of the spacer 13 via a fixing member (not shown) made of a plurality of strip-shaped double-sided tapes or the like. The fixing member is provided with a step, and the ear portions 15a to 15c of the optical sheets 15A to 15C are fixed to the spacer 13 without overlapping via the fixing member. The optical sheets 15A to 15C adjust the light distribution and brightness of the passing light, and are a diffusion sheet (diffuse film), a prism sheet (prism film), a brightness improvement sheet (brightness improvement film), and a louver sheet (louver film). ) Etc.
　光学シート１５Ｃの出射面側にはトップフレーム１６が配置され、ボトムフレーム２にトップフレーム１６が固定される。 The top frame 16 is arranged on the exit surface side of the optical sheet 15C, and the top frame 16 is fixed to the bottom frame 2.
　図８は、比較例においてボトムフレーム２’に対して別部材４’が取り付けられる状態を示す図である。図８において、この比較例では、カメラ等の他の部品が配置される欠損部に対応してボトムフレーム２’の外周端部側に凹部２ａ’が設けられ、別部材４’が凹部２ａ’に固定される。別部材４’は、欠損部を囲む壁になる部分と、ボトムフレーム２’の底部との固定を行うための部分とを有し、板金等により一体に形成されている。 FIG. 8 is a diagram showing a state in which another member 4'is attached to the bottom frame 2'in the comparative example. In FIG. 8, in this comparative example, a recess 2a'is provided on the outer peripheral end side of the bottom frame 2'corresponding to a defective portion on which other parts such as a camera are arranged, and a separate member 4'is a recess 2a'. Is fixed to. The separate member 4'has a portion that becomes a wall surrounding the defective portion and a portion for fixing the bottom portion of the bottom frame 2', and is integrally formed of sheet metal or the like.
　別部材４’の孔部４ａ’にはバーリング加工（穴フランジ加工）が施されており、孔部４ａ’のフランジ部がボトムフレーム２’の孔部２ｂ’に挿通されたうえでカシメられることで、ボトムフレーム２’に別部材４’が固定される。図９は、ボトムフレーム２’に対して別部材４’が取り付けられた状態を示す図である。 The hole 4a'of the separate member 4'is subjected to burring (hole flange processing), and the flange of the hole 4a'is inserted into the hole 2b' of the bottom frame 2'and then crimped. Then, another member 4'is fixed to the bottom frame 2'. FIG. 9 is a diagram showing a state in which another member 4'is attached to the bottom frame 2'.
　しかしながら、図８および図９の構成では、ボトムフレーム２’の製作に複雑な形状の別部材４’が必要となり、フレーム用部品の成立が困難となって、フレーム用部品のコストが欠損部のない通常形状の場合と比較して大きく上昇してしまう可能性がある。また、ボトムフレーム２’に別部材４’をカシメにより固定する場合、カシメ残りの異物発生による汚染（コンタミネーション）が発生しやすくなり、その対策（カシメ部に異物脱落防止テープの追加等）のための更なるコストアップも予想される。 However, in the configurations of FIGS. 8 and 9, another member 4'with a complicated shape is required to manufacture the bottom frame 2', which makes it difficult to form the frame parts, and the cost of the frame parts is high. There is a possibility that it will rise significantly compared to the case of a normal shape. In addition, when the separate member 4'is fixed to the bottom frame 2'by caulking, contamination due to the generation of foreign matter remaining after caulking is likely to occur, and countermeasures (addition of foreign matter falling prevention tape to the crimped portion, etc.) are taken. Further cost increase is expected.
　これに対し、図４および図５に示された実施形態のボトムフレーム２よれば、カメラ等の他の部品が配置される欠損部に対応して孔部２ｃが設けられ、この孔部２ｃに固定部材３を介して遮光部品４が固定されるだけであるため、フレーム用部品のコストが欠損部のない通常形状の場合と比較して大きく上昇してしまうことがなくなる。また、カシメも不要となるため、汚染の問題も発生せず、汚染対策のためのコストアップも必要ない。 On the other hand, according to the bottom frame 2 of the embodiment shown in FIGS. 4 and 5, a hole 2c is provided corresponding to a defective portion in which other parts such as a camera are arranged, and the hole 2c is provided with a hole 2c. Since the light-shielding component 4 is only fixed via the fixing member 3, the cost of the frame component does not increase significantly as compared with the case of the normal shape having no defective portion. In addition, since caulking is not required, there is no problem of pollution, and there is no need to increase the cost for pollution control.
　図１０は、比較例におけるリフレクタ９’の一例を示す外観斜視図である。図１０において、比較例のリフレクタ９’の外周端部側には、ボトムフレーム２’（図８、図９）に取り付けられた別部材４’を避ける凹部９ａ’が設けられている。 FIG. 10 is an external perspective view showing an example of the reflector 9'in the comparative example. In FIG. 10, a recess 9a'that avoids another member 4'attached to the bottom frame 2'(FIGS. 8 and 9) is provided on the outer peripheral end side of the reflector 9'of the comparative example.
　図１１は、比較例におけるスペーサ１３’の一例を示す外観斜視図である。図１１において、比較例のスペーサ１３’の外周端部側には、ボトムフレーム２’（図８、図９）に取り付けられた別部材４’を避ける凹部１３ａ’が設けられている。 FIG. 11 is an external perspective view showing an example of the spacer 13'in the comparative example. In FIG. 11, a recess 13a'that avoids another member 4'attached to the bottom frame 2'(FIGS. 8 and 9) is provided on the outer peripheral end side of the spacer 13'of the comparative example.
　図１０および図１１において、一般にリフレクタ９’やスペーサ１３’は樹脂による射出成型により製造されるが、凹部９ａ’、１３ａ’に起因して成型収縮により変形が生じ、離型に問題が生じたり、寸法精度が低下したりといった問題が発生する。 In FIGS. 10 and 11, the reflector 9'and the spacer 13' are generally manufactured by injection molding with a resin, but the recesses 9a'and 13a' cause deformation due to molding shrinkage, which may cause a problem in mold release. , Problems such as deterioration of dimensional accuracy occur.
　これに対し、図６および図７に示された実施形態のリフレクタ９およびスペーサ１３によれば、カメラ等の他の部品が配置される欠損部に対応して設けられる遮光部品４を囲むように繋ぎ形状９ｄ、１３ｂが設けられ、リフレクタ９やスペーサ１３の端部に凹部が形成されない。そのため、凹部に起因して成型収縮により変形が生じることがなく、離型に問題が生じたり、寸法精度が低下したりといった問題が発生しない。 On the other hand, according to the reflector 9 and the spacer 13 of the embodiment shown in FIGS. 6 and 7, the light-shielding component 4 provided corresponding to the defective portion where other components such as a camera are arranged is surrounded. The connecting shapes 9d and 13b are provided, and no recess is formed at the end of the reflector 9 or the spacer 13. Therefore, deformation does not occur due to molding shrinkage due to the concave portion, and problems such as a problem in mold release and a decrease in dimensional accuracy do not occur.
　次に、図１～図５における遮光部品４の材料について説明する。遮光部品４の内部にカメラ等の他の部品が配置された場合に、遮光部品４の周囲の面が高い輝度で発光すると、他の部品が目立つことになる。そのため、他の部品を目立たせたくない場合には、遮光部品４の周囲の輝度を低下させることが有効である。この場合、遮光部品４に黒色の低反射（高吸収）の材料を使用することが望ましい。図１２は、面状照明装置１の欠損部の付近が暗くなる例を示す図である。反対に、遮光部品４の周囲まで液晶表示装置による表示が行われるために高い輝度を要する場合には、遮光部品４に白色の高反射（低吸収）の材料を使用することが望ましい。 Next, the material of the light-shielding component 4 in FIGS. 1 to 5 will be described. When another component such as a camera is arranged inside the light-shielding component 4, if the peripheral surface of the light-shielding component 4 emits light with high brightness, the other component becomes conspicuous. Therefore, when it is not desired to make other parts stand out, it is effective to reduce the brightness around the light-shielding part 4. In this case, it is desirable to use a black low-reflection (high-absorption) material for the light-shielding component 4. FIG. 12 is a diagram showing an example in which the vicinity of the defective portion of the planar lighting device 1 becomes dark. On the contrary, when high brightness is required for the display by the liquid crystal display device to the periphery of the light-shielding component 4, it is desirable to use a white high-reflection (low-absorption) material for the light-shielding component 4.
　また、他の部品がカメラである場合等、光がカメラに入らないような遮光が求められる場合で、遮光部品４の周囲は明るくさせたい場合には、２色成型や着色により、遮光部品４の内部を黒色とし、外部を白色とすることもできる。 Further, when it is required to block light so that light does not enter the camera, such as when another component is a camera, and when it is desired to brighten the periphery of the light-shielding component 4, the light-shielding component 4 is molded in two colors or colored. The inside of the camera can be black and the outside can be white.
　以上、本発明の実施形態について説明したが、本発明は上記実施形態に限定されるものではなく、その趣旨を逸脱しない限りにおいて種々の変更が可能である。 Although the embodiments of the present invention have been described above, the present invention is not limited to the above embodiments, and various modifications can be made without departing from the spirit of the present invention.
　以上のように、実施形態に係る面状照明装置は、他の部品が配置される、外周が閉じた孔部から構成される欠損部が外周端部側に設けられるフレームと、欠損部に配置され、孔部を包囲する筒状の遮光部品とを備える。これにより、欠損部がフレームの外周端部側に設けられる場合であっても製造が容易となる。 As described above, in the planar lighting device according to the embodiment, a frame in which a defect portion composed of a hole portion having a closed outer periphery is provided on the outer peripheral end portion side on which other parts are arranged and a defect portion are arranged in the defect portion. It is provided with a cylindrical light-shielding component that surrounds the hole. As a result, even when the defective portion is provided on the outer peripheral end portion side of the frame, manufacturing becomes easy.
　また、欠損部および遮光部品は、出射方向から見て略矩形である。これにより、組立時における位置決めが容易となる。 In addition, the defective portion and the light-shielding component are substantially rectangular when viewed from the emission direction. This facilitates positioning during assembly.
　また、遮光部品は、欠損部の周辺を暗くしたい場合には黒色の低反射の材料が用いられ、欠損部の周辺を明るくしたい場合には白色の高反射の材料が用いられる。これにより、欠損部を目立たなくさせたり、欠損部の近くまで輝度を高く保ったり、種々のニーズに対応することができる。 For the light-shielding parts, a black low-reflection material is used when the periphery of the defect is to be darkened, and a white high-reflection material is used when the periphery of the defect is to be brightened. As a result, it is possible to make the defective portion inconspicuous, keep the brightness high close to the defective portion, and meet various needs.
　また、遮光部品は、内面と外面とで同じ色か、異なる色に設定される。これにより、遮光部品の内部に対する遮光と外部の輝度に対する要求とを両立させることができる。 Also, the light-shielding parts are set to the same color or different colors on the inner and outer surfaces. As a result, it is possible to achieve both the light shielding inside the light-shielding component and the requirement for the external brightness.
　また、遮光部品に隣接し、フレームの外周端部側に設けられる繋ぎ形状を有する射出成型部品を有する。これにより、成型収縮により変形が生じることがなく、離型に問題が生じたり、寸法精度が低下したりといった問題がなくなる。 In addition, it has an injection-molded part that is adjacent to the light-shielding part and has a connecting shape provided on the outer peripheral end side of the frame. As a result, deformation does not occur due to molding shrinkage, and problems such as a problem in mold release and a decrease in dimensional accuracy are eliminated.
　また、上記実施の形態により本発明が限定されるものではない。上述した各構成要素を適宜組み合わせて構成したものも本発明に含まれる。また、さらなる効果や変形例は、当業者によって容易に導き出すことができる。よって、本発明のより広範な態様は、上記の実施の形態に限定されるものではなく、様々な変更が可能である。 Further, the present invention is not limited by the above-described embodiment. The present invention also includes a configuration in which the above-mentioned components are appropriately combined. Further, further effects and modifications can be easily derived by those skilled in the art. Therefore, the broader aspect of the present invention is not limited to the above-described embodiment, and various modifications can be made.
　１　面状照明装置，１ｂ　欠損部，２　ボトムフレーム，２ｃ　孔部，３　固定部材，４　遮光部品，６　基板，７　光源，９　リフレクタ，９ｄ　繋ぎ形状，１１　レンズ，１３　スペーサ，１３ｂ　繋ぎ形状，１５Ａ～１５Ｃ　光学シート，１６　トップフレーム 1 planar lighting device, 1b defective part, 2 bottom frame, 2c hole part, 3 fixing member, 4 light-shielding part, 6 board, 7 light source, 9 reflector, 9d connecting shape, 11 lens, 13 spacer, 13b connecting shape, 15A ~ 15C optical sheet, 16 top frame

Claims (5)

  1. 　他の部品が配置される、外周が閉じた孔部から構成される欠損部が外周端部側に設けられるフレームと、
    　前記欠損部に配置され、前記孔部を包囲する筒状の遮光部品と、
    を備える面状照明装置。     A frame in which a defect portion composed of a hole having a closed outer circumference on which other parts are arranged is provided on the outer peripheral end side, and a frame.
    A cylindrical light-shielding component that is placed in the defect and surrounds the hole,
    A planar lighting device equipped with.
  2. 　前記欠損部および前記遮光部品は、出射方向から見て略矩形である、
    請求項１に記載の面状照明装置。     The defective portion and the light-shielding component are substantially rectangular when viewed from the emission direction.
    The planar lighting device according to claim 1.
  3. 　前記遮光部品は、前記欠損部の周辺を暗くしたい場合には黒色の低反射の材料が用いられ、前記欠損部の周辺を明るくしたい場合には白色の高反射の材料が用いられる、
    請求項１または２に記載の面状照明装置。     For the light-shielding component, a black low-reflection material is used when it is desired to darken the periphery of the defect portion, and a white high-reflection material is used when the periphery of the defect portion is desired to be brightened.
    The planar lighting device according to claim 1 or 2.
  4. 　前記遮光部品は、内面と外面とで同じ色か、異なる色に設定される、
    請求項１～３のいずれか一つに記載の面状照明装置。     The light-shielding component is set to the same color or a different color on the inner surface and the outer surface.
    The planar lighting device according to any one of claims 1 to 3.
  5. 　前記遮光部品に隣接し、前記フレームの外周端部側に設けられる繋ぎ形状を有する射出成型部品を有する
    請求項１～４のいずれか一つに記載の面状照明装置。     The planar lighting device according to any one of claims 1 to 4, further comprising an injection-molded part having a joint shape provided adjacent to the light-shielding part and provided on the outer peripheral end side of the frame.
PCT/JP2021/005451 2020-04-15 2021-02-15 Planar illumination device WO2021210258A1 (en)

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Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20160066456A1 (en) * 2014-09-03 2016-03-03 Samsung Display Co., Ltd. Cover window, method of manufacturing the cover window, and display device including the cover window
US20200064681A1 (en) * 2018-08-27 2020-02-27 Lg Display Co., Ltd. Display device

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20160066456A1 (en) * 2014-09-03 2016-03-03 Samsung Display Co., Ltd. Cover window, method of manufacturing the cover window, and display device including the cover window
US20200064681A1 (en) * 2018-08-27 2020-02-27 Lg Display Co., Ltd. Display device

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