Reflecting member and light source device

Abstract

The invention provides a reflecting member and a light source device, which can restrain brightness unevenness in a light emitting surface. The reflective member has: a plurality of first regions surrounded by the plurality of first wall sections in a plan view and arranged in an array in the plan view; a plurality of second regions that are disposed on the outside of the first region in a plan view, and that each have a second portion, a portion of which is lower in height from the outside toward the inside, and a second wall portion connected to the inside end of the second portion; and a plurality of third regions disposed between the first region and the second region in a plan view, the third regions including at least one third wall portion having a lower height than the first wall portion.

Description

[0001] This application is a divisional application of the invention patent application with the application date of March 24, 2022, application number 202210301030.0, and invention name “Reflective component and light source device”. Technical Field

[0002] The present disclosure relates to a reflective component and a light source device. Background Art

[0003] As direct-type backlights used in liquid crystal televisions, vehicle-mounted meters, etc., various surface-emitting light source devices have been proposed (e.g., Patent Documents 1 and 2). The light source device includes: a plurality of light sources arranged in rows and columns on a substrate, and a light-reflective wall portion surrounding and partitioning each light source.

[0004] Prior art literature

[0005] Patent Literature

[0006] Patent Document 1: International Publication No. 2012 / 029601

[0007] Patent Document 2: (Japanese) Patent Application No. 2021-22531 Summary of the invention

[0008] Technical problem to be solved by the invention

[0009] The divided areas are preferably of the same size and shape, and light sources are arranged in each area. However, there may be an area at the outer edge of the light reflective wall portion where the size or shape makes it difficult to arrange a light source. In this case, uneven brightness may occur within the light-emitting surface.

[0010] The present invention has been made in view of the above-mentioned problems, and an object of the present invention is to provide a reflecting member and a light source device capable of suppressing uneven brightness within a light-emitting surface.

[0011] Technical solutions for solving technical problems

[0012] This application includes the following inventions.

[0013] (1) A reflective component comprising:

[0014] A first area includes a first portion and a first wall portion surrounding the first portion and connected to the first portion, wherein a first partition area defined by the first portion and the first wall portion is arranged in a plane-filled shape;

[0015] A second area, which is arranged outside the first area in a plan view;

[0016] The second region has a second portion arranged at a higher position than the first portion,

[0017] The second portion is connected to a second wall portion having a lower height than the first wall portion on a side close to the first region.

[0018] (2) A reflective member comprising: a plurality of bottoms and wall portions surrounding each of the bottoms;

[0019] The outer wall portion located outside is lower in height from the bottom than the inner wall portion located inside the outer wall portion, and the plurality of inner wall portions have the same height from the bottom.

[0020] (3) A light source device comprising:

[0021] substrate;

[0022] A plurality of light sources are arranged on the substrate;

[0023] The above-mentioned reflective component is arranged on the substrate;

[0024] The reflecting member has a plurality of through holes arranged in the first portion, the third portion, and the fourth portion.

[0025] The light sources are respectively located at the inner sides of the through holes.

[0026] (4) A reflective component, characterized in that it has:

[0027] A plurality of first regions, which are surrounded by a plurality of first wall portions in a plan view and are arranged in an array in a plan view;

[0028] a plurality of second regions arranged outside the first region in a plan view, comprising a second portion whose height decreases from the outside toward the inside, and a second wall portion connected to an inner end of the second portion;

[0029] The plurality of third regions are arranged between the first region and the second region in a plan view and include at least one third wall portion having a height lower than that of the first wall portion.

[0030] (5) A light source device, comprising:

[0031] substrate;

[0032] A plurality of light sources are arranged on the substrate;

[0033] The reflective component mentioned above.

[0034] Effects of the Invention

[0035] According to the reflecting member and the light source device of one embodiment of the present invention, it is possible to suppress uneven brightness within the light emitting surface. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] Figure 1A This is a schematic plan view of a reflecting member according to one embodiment of the present invention.

[0037] Figure 1B yes Figure 1A Stereoscopic diagram.

[0038] Figure 1C yes Figure 1A An enlarged view of the main components.

[0039] Figure 1D yes Figure 1C Enlarged view of the ID-ID line.

[0040] Figure 1E yes Figure 1C IE-IE line cross-sectional view.

[0041] Figure 1F yes Figure 1C IF-IF line cross-sectional view.

[0042] Figure 1G yes Figure 1C IG-IG line cross-sectional view.

[0043] Figure 1H yes Figure 1A A partially enlarged schematic cross-sectional view of the first wall portion 11W.

[0044] Fig. 1I yes Figure 1A A partial enlarged schematic cross-sectional view of the third wall portion 13W.

[0045] Figure 1J Yes means Figure 1A A schematic top view of the first division area of ​​the first area.

[0046] Figure 2A It is a schematic plan view of a reflecting member according to another embodiment of the present invention.

[0047] Figure 2B yes Figure 2A A three-dimensional diagram of the main components.

[0048] Figure 2C yes Figure 2A An enlarged view of the main components.

[0049] Figure 2D yes Figure 2C IID-IID line cross-sectional view.

[0050] Figure 2E yes Figure 2C IIE-IIE line cross-sectional view.

[0051] Figure 2F yes Figure 2C IIF-IIF line cross-sectional view.

[0052] Figure 2G yes Figure 2C IIG-IIG line cross-sectional view.

[0053] Figure 3 This is a schematic plan view of a reflecting member according to still another embodiment of the present invention.

[0054] Figure 4 yes Figure 1A A partial enlarged schematic cross-sectional view of the periphery of a light emitting element of a light source device.

[0055] Figure 5 Yes means Figure 1A A graph showing the bat-wing light distribution characteristics of a light emitting element of a light source device.

[0056] Figure 6 This is a schematic exploded perspective view of a light source device according to an embodiment of the present invention.

[0057] Figure 7 yes Figure 6 A schematic cross-sectional view of the main components of a light source device. DETAILED DESCRIPTION

[0058] The following describes the embodiments of the present disclosure with appropriate reference to the accompanying drawings. However, the embodiments described below are intended to embody the technical ideas of the present disclosure, and unless otherwise specified, the present disclosure is not limited to the following description. In addition, the contents described in one embodiment or example may also be applied to other embodiments and examples. The sizes and positional relationships of the components shown in the drawings are sometimes exaggerated for the purpose of clarifying the description.

[0059] In this embodiment, the light extraction surface side of the light source of the light source device is sometimes referred to as the upper surface or the upper side. In addition, high or a high position indicates being located above, and low or a low position indicates being located on the opposite side of the upper side. Unless otherwise specified, when observing from the upper surface (looking down), the center side of the reflective component, substrate, or light source device is sometimes referred to as the inner side, and the side opposite to the center is sometimes referred to as the outer side. It should be noted that a sectional view sometimes uses a sectional view that only shows the cutting surface.

[0060] (Reflective parts)

[0061] like Figure 1A to Figure 1JAs shown, the reflective component 10 of one embodiment of the present invention has at least a first area 11, a second area 12, and a second wall portion 12W when viewed from above. The first area 11 includes: a first portion 11B, and a first wall portion 11W surrounding the first portion 11B and connected to the first portion 11B. The first partition area defined by the first portion 11B and the first wall portion 11W is arranged in a plane-filling shape. Here, the plane-filling shape refers to a plane that is filled with a finite type of plane figures without gaps, and is a plane as a whole. The second area 12 is arranged outside the first area 11 when viewed from above. The second area 12 has a second portion 12B that is arranged at a higher position than the first portion 11B. The second wall portion 12W has a height lower than the first wall portion 11W, and is connected to the second portion 12B on the side close to the first area 11.

[0062] In other words, the reflective member 10 includes: a plurality of bottoms (e.g., the first portion 11B, etc.), and walls (e.g., the first wall 11W, etc.) surrounding the bottoms, respectively. Moreover, the outer wall (e.g., the third wall 13W) located outside is smaller in height from the bottom than the inner wall (e.g., the first wall 11W) located inside the outer wall, and the plurality of inner wall have the same height from the bottom.

[0063] By forming the reflective member in the above-mentioned shape, in the case of a partitioned area where a light source cannot be arranged at the outer edge of the reflective member, uneven brightness within the light-emitting surface can be suppressed. This is because, by arranging the second portion 12B at a position higher than the first portion 11B, when light from a light source arranged in a partitioned area located further inward than the second area 12 reaches the second area 12, it can be effectively reflected upward by the second portion 12B.

[0064] The reflective member 10 is a member formed by punching a sheet-like member with projections and depressions, and can be formed into a structure in which each wall portion has a pair of side portions. In this case, the interior of each wall portion is a hollow.

[0065] The reflecting member 10 is used as a partitioning member having a wall portion for defining a light emitting area and arranging the light sources in a light source device having a plurality of light sources. A region having a bottom surrounded by a wall portion (more specifically, a side portion of one of the wall portions) is also referred to as a partitioning region. The reflecting member 10 has a plurality of partitioning regions. The partitioning region of the first region indicates the region between the upper ends of the first wall portions 11W opposed to the first portion 11B in a cross-sectional view (see Figure 1F , Figure 2D Sometimes, the division area of ​​the first region is referred to as the first division area.

[0066] like Figure 1JAs shown, in the first wall portion 11W, the side portions of the first wall portion 11W located on both sides in the X direction of the first portion 11B on the X direction are referred to as 11Wa, the side portions on the opposite direction side to the X direction are referred to as 11Wb, the side portions of the first wall portion 11W located on both sides in the Y direction of the first portion 11B on the Y direction are referred to as 11Wc, and the side portions on the opposite direction side to the Y direction are referred to as 11Wd. In this case, the first division area is constituted by the first portion 11B, the side portions 11Wb of the first wall portion 11W located on the X direction side of the first portion 11B, the side portions 11Wa of the first wall portion 11W located on the opposite direction side to the X direction of the first portion 11B, the side portions 11Wd of the first wall portion 11W located on the Y direction side of the first portion 11B, and the side portions 11Wc of the first wall portion 11W located on the opposite direction side to the Y direction of the first portion 11B.

[0067] It should be noted that each partitioned area is a concave portion defined by a wall portion and a bottom portion. As described later, a through hole or the like may be arranged in the concave portion.

[0068] The plane shape, i.e., the outer shape of the reflective member may be, for example, a polygon such as a square or rectangle, a circle, an ellipse, or a shape that combines two or more shapes of various sizes such as a triangle or quadrilateral, a circle, an ellipse, etc. (hereinafter, sometimes referred to as an irregular shape). Even if there is an area on the outer edge of the reflective member where the light sources cannot be arranged regularly, the function of reflecting the light from the plurality of light sources relative to the light extraction surface side to suppress uneven brightness within the light emitting surface can be exerted.

[0069] The reflecting member has, as a partition area, for example, a first area 11 and a second area 12. In addition to the above areas, the reflecting member may also have, as a partition area, one or more areas of a third area 13, a fourth area 14, and a fifth area 15. In addition, the reflecting member may also have a fourth wall portion 14W disposed at its outer edge.

[0070] The first region 11 includes a first portion 11B and a first wall portion 11W surrounding the first portion 11B and connected to the first portion 11B. The first wall portion 11W may be referred to as an inner wall portion.

[0071] The second region 12 has a second portion 12B. The second portion 12B is connected to the second wall portion 12W.

[0072] The third region 13 includes a third portion 13B and a wall portion surrounding the third portion 13B and connected to the third portion 13B. The third wall portion 13W may be referred to as an outer wall portion.

[0073] The fourth region 14 includes a fourth portion 14B and a wall portion surrounding the fourth portion 14B and connected to the fourth portion 14B.

[0074] The fifth region 15 includes a fifth portion 15B and a wall portion surrounding the fifth portion 15B and connected to the fifth portion 15B. The fifth portion is connected to the fourth wall portion 14W.

[0075] In other words, the first area can be referred to as an inner area. In addition, the entire outer periphery of the first portion (eg, four sides) is an area surrounded by the high wall of the first wall portion.

[0076] The second region may be referred to as an outer edge region.

[0077] The third area may be referred to as an inner outer area. In addition, at least a portion (eg, one side) of the wall connected to the third portion is an area surrounded by the low wall of the third wall portion.

[0078] The fourth area can be referred to as an outer inner area. In addition, the wall opposed to the fourth portion is an area surrounded by a low wall such as the third wall portion.

[0079] The fifth area may be referred to as an outer area, which is an area arranged at the outer edge of the reflective component.

[0080] It should be noted that the first portion 11B, the second portion 12B, the third portion 13B, the fourth portion 14B, and the fifth portion 15B are sometimes referred to as the first bottom, the second bottom, the third bottom, the fourth bottom, and the fifth bottom, respectively. In addition, the second region 12 is a region where no light source is configured. Although the first region 11, the third region 13, the fourth region 14, and the fifth region 15 can be formed as a light-emitting region where a light source is configured, due to the planar shape of the reflective member 10, a portion thereof may also include a region where no light source is configured.

[0081] (First Area 11)

[0082] The first region 11 is a region including a first portion 11B serving as a bottom and a first wall portion 11W surrounding the first portion 11B. The first region 11 is a region defined by the first portion 11B and the first wall portion 11W in which first divisional regions are arranged in a planar filling pattern.

[0083] The planar shape of the first portion 11B is, for example, a circle, an ellipse, a triangle, a quadrilateral, etc. The first portion 11B is preferably a shape that can be filled with a plane. As a shape that can be filled with a plane, for example, a square ( Figure 1A etc.), rectangle, hexagon ( Figure 2A , Figure 3 The first part 11B may have concavoconvex or flat surfaces. The first part 11B may have a through hole. The light source may be arranged in the through hole. The first part 11B preferably has an area in which one light source can be arranged in one first part 11B.

[0084] The first wall 11W surrounds the entire circumference of the first portion 11B. The first wall 11W preferably surrounds the first portion 11B along the plane shape of the first portion 11B. For example, it is preferred that the lower end of the first wall 11W surrounds the first portion 11B in a similar shape larger than the plane shape of the first portion 11B, which is a square, a rectangle, or a hexagon. When the plane shape formed by the upper end of the first wall 11W surrounding the first portion 11B is a plane filling shape, the first region 11 can be formed in a plane filling shape.

[0085] The height OD1 of the first wall portion 11W from the lower surface of the first portion 11B to the upper end thereof (see Figure 1H ) For example, it is preferably higher than the height of the light source arranged in the first area 11. In addition, the height OD1 of the first wall portion 11W can be less than 800% of the height of the light source arranged in the first area 11, preferably less than 500%, and more preferably less than 300%. Specifically, the height OD1 of the first wall portion 11W can be exemplified as less than 20 mm, preferably less than 8 mm. In the case of forming a thinner light source device, it is preferably 1 mm to 4 mm. Thereby, the backlight unit including optical components such as the diffuser plate described later can be made extremely thin. The first wall portion 11W is preferably the same height throughout the entire area. In other words, the upper ends of the first wall portion 11W are preferably located at the same height within the reflective component 10.

[0086] The spacing of the first wall portion 11W (in Figure 1F The pitch of the first wall portion 11W may be, for example, 1 mm to 50 mm, preferably 5 mm to 20 mm, and more preferably 6 mm to 15 mm.

[0087] The side of the first wall portion 11W is Figure 1H In the example shown, the first portion 11B is inclined. The inclination angle (in Figure 1H The upper end of the first wall portion 11W may be flat or may be shaped like this. Figure 1H As shown in FIG. 1 , it is a sharp corner or a rounded corner. In other words, the first wall portion 11W is Figure 1E The cross-sectional shape in the cross-section shown (XZ plane) may be a quadrilateral (rectangle, trapezoid, etc.) or a triangle (the corners may be rounded). The surface of the first wall portion 11W may be flat or have a concavo-convex shape.

[0088] (Second Area 12)

[0089] like Figure 1E , Figure 2DAs shown in the figure, the second area 12 is an area including a second part 12B arranged at a position higher than the first part 11B, that is, at a position closer to the upper end of the first wall portion 11W than the first part 11B. The second area 12 is arranged outside the first area 11. The second area 12 can be arranged adjacent to the first area 11 in part or in whole, or can be arranged separated from the first area 11 in part or in whole. The second area 12 is arranged adjacent to the outer periphery of the reflective component 10. The second part 12B is connected to the fourth wall portion 14W arranged at the outer edge of the reflective component described later. In this case, the second area 12 is sometimes also arranged completely separated from the first area 11.

[0090] As described above, the reflector 10 of this embodiment is not configured with a light source in its periphery and the partition area when viewed from above, and cannot be configured in a prescribed shape and size. Therefore, in the second area 12 configured at the outermost edge, a second part 12B having a shape different from that of the first part 11B is configured.

[0091] The second region 12 may be divided into the second portion 12B by a wall portion having the same height as the first wall portion, or may not be divided. In addition, the second region 12 may be provided with one second portion 12B, or may be provided with a plurality of second portions 12B at mutually separated positions.

[0092] The second portion 12B preferably has a smaller area when viewed from above than the first portion 11B. For example, the area when viewed from above may be 95% to 5% of the area of ​​the first portion 11B. However, when adjacent second portions are connected to each other, the area when viewed from above may be larger than the first portion. The planar shape of the second portion 12B corresponds to the outer shape of the reflective component 10 and may be various shapes.

[0093] The second part 12B may have concavoconvex or flat surfaces. In either case, the second part 12B is arranged at a position higher than the first part 11B and lower than the upper end of the first wall 11W. For example, the lowest part of the second part 12B is arranged at a position between 50% and 80% of the height OD of the first wall 11W, preferably between 50% and 65%. The entire height of the second part 12B may be constant or may be inclined relative to the upper surface of the first part 11B. In the case where the second part 12B is inclined, the height of the second part may decrease or increase as it moves toward the first area 11. When the height of the second part decreases as it moves toward the first area, the light from the light source reaching the second area 12 can be effectively reflected upward. In the case where the second part 12B is inclined, the angle relative to the first part 11B of the first area 11 can be, for example, less than 30 degrees. By arranging the above-mentioned part at the outer edge of the reflective component, the light traveling from the inner side of the reflective component can be reflected upward at the outer edge, which can advantageously act on suppressing uneven brightness within the light-emitting surface.

[0094] The second portion 12B is connected to the second wall portion 12W having a height lower than the upper end of the first wall portion 11W on the side close to the first region 11. In this case, the second portion 12B may be connected to the middle of the height of the second wall portion 12W, or may be connected to the second wall portion 12W as shown in FIG. Figure 1E As shown, it is connected to the upper end of the second wall portion 12W.

[0095] In other words, the second wall portion 12W is arranged adjacent to the second region 12 on the side of the second region 12 that is closer to the first region 11 .

[0096] (Third Area 13)

[0097] The reflective member 10 preferably further includes a third region 13. The third region 13 is arranged outside the first region 11. The third region 13 is arranged outside the first region 11 and adjacent to the first region 11. In addition, the third region 13 is arranged inside the second region 12.

[0098] The third area 13 is an area including the third portion 13B as the bottom, and the first wall 11W and the third wall 13W arranged to surround the third portion 13B and be connected to the third portion 13B. In other words, the third area 13 refers to an area of ​​a partitioned area of ​​one, preferably a plurality of, third portions 13B surrounded by the first wall 11W and the third wall 13W on the entire circumference. Here, the partitioned area of ​​the third area refers to an area between the upper ends of the first wall 11W and the third wall 13W that surround the third portion 13B on the entire circumference and the opposed first wall 11W and the third wall 13W (see Figure 1E wait).

[0099] The third region 13 may include one third portion 13B or a plurality of third portions 13B. In addition, the third region 13 may be disposed outside each first region 11 or outside a portion of the first regions 11 .

[0100] The third portion 13B may be of the same shape and size as the first portion 11B. When a plurality of third portions 13B are provided, it is preferred that all of the third portions 13B have the same planar shape and the same size. In addition, in the third region 13, the third portions 13B are preferably provided so that all or a portion of the third portions 13B form the same plane. In other words, the third portions 13B are preferably provided at the same height relative to the upper end of the first wall portion 11W. In addition, the third portions 13B are preferably provided at the same height relative to the upper end of the first wall portion 11W so as to form the same plane as the first portion 11B.

[0101] For example, Figure 1A As shown in FIG. 1 and FIG. 2 , when the third portion 13B is a quadrilateral in plan view, the third portion 13B is surrounded by, for example, a first wall portion 11W disposed on one side and a third wall portion 13W disposed on three sides. Figure 2A As shown in FIG. 1 and FIG. 2 , when the third portion 13B is a regular hexagon, the third portion 13B is surrounded by, for example, a third wall portion 13W arranged on one side and first wall portions 11W arranged on five sides.

[0102] The third wall portion 13W is a part of the wall portion surrounding the outer periphery of the third portion 13B.

[0103] The height OD3 from the lower surface of the third portion 13B of the third wall portion 13W to the upper end thereof (see Fig. 1I ) is higher than the height OD1 of the first wall portion 11W (refer to Figure 1H ) is low. By having the above-mentioned third wall portion 13W, the light from the light source configured in the third area 13 can pass through the top of the third wall portion 13W and reach the second area 12 side. As a result, the light extracted upward from the second area 12 can be increased. Specifically, the height of the third wall portion 13W can be less than 500% of the height of the light source configured in the third area 13, preferably less than 300%, and more preferably less than 200%. Specifically, the height of the third wall portion 13W can be exemplified as less than 10 mm, preferably less than 4 mm. In other words, the height OD3 of the third wall portion 13W from the third portion 13B can be exemplified as 50% to 90% of the height OD1 of the first wall portion 11W, preferably 50% to 75%. The third wall portion 13W is preferably the same height throughout its entire length. In other words, the third wall portion 13W and the second wall portion 12W are preferably the same height as the first portion 11B.

[0104] exist Fig. 1I In the example shown, the side of the third wall portion 13W is inclined relative to the third portion 13B. The inclination angle (in Fig. 1I The angle γ3 in the figure can be set arbitrarily according to the height OD3 of the third wall portion 13W, for example, it can be set to 45 degrees to 80 degrees. The upper end of the third wall portion 13W can be flat, can be a sharp angle, or can be as Fig. 1I That is, the cross-sectional shape of the third wall portion 13W in the XZ plane may be a quadrilateral (rectangle, trapezoid, etc.) or a triangle (the corners may be rounded).

[0105] The third area 13 is divided into Figure 1E It refers to the area between the upper end of the third wall portion 13W and the upper end of the first wall portion 11W across the third portion 13B. The surface of the third wall portion 13W may be flat or have a concave-convex shape. It should be noted that the width M3 of the third wall portion 13W is smaller than the width M1 of the first wall portion 11W, and may be, for example, 50% to 90% of the width M1.

[0106] In the third wall portion 13W having a pair of side portions, one side portion of the third wall portion 13 is opposite to the second wall portion 12W, and the other side portion of the third wall portion 13 is opposite to the first wall portion 11W. When the second wall portion 12W is arranged in the X direction of the third region 13, it is preferred that the wall portion located on the X direction side of the third region 13 is the third wall portion 13W, and the wall portion located on the Y direction side of the third region 13 is the first wall portion 11W. Thus, it is easy to guide the light from the light source arranged in the third region 13 to the outer edge periphery of the reflective member.

[0107] (Fourth Region 14)

[0108] The reflective member 10 further preferably has a fourth region 14. The fourth region 14 is arranged outside the first region 11. The fourth region 14 may also be arranged outside the third region 13. The fourth region 14 may be arranged outside the first region 11 adjacent to the first region 11, or may be arranged outside the third region 13 adjacent to the third region 13. In addition, the fourth region 14 may also be adjacent to the second region 12.

[0109] The fourth region 14 is a region including the fourth portion 14B as the bottom and at least the second wall portion 12W connected thereto. In addition, the fourth region 14 may be a region including the first wall portion 11W in addition to the fourth portion 14B and the second wall portion 12W, or may be a region including the first wall portion 11W and the third wall portion 13W. In this case, both the first wall portion 11W and the third wall portion 13W are connected to the fourth portion 14B.

[0110] For example, Figure 1AAs shown in FIG. 1 and FIG. 2 , when the fourth portion 14B is a quadrilateral in a plan view, the fourth portion 14B may be connected to the second wall portion 12W on at least one side. The fourth portion 14B may be surrounded by the first wall portion 11W arranged on three sides and the second wall portion 12W arranged on one side, or may be surrounded by the first wall portion 11W arranged on one side, the second wall portion 12W arranged on two sides, and the third wall portion 13W arranged on one side. Figure 2A As shown in FIG. 1 , when the fourth portion 14B is a regular hexagon, the fourth portion 14B may be connected to the second wall portion 12W at least one side, or may be connected to the second wall portion 12W at two sides. The fourth portion 14B may be surrounded by the first wall portion 11W arranged on three sides, the second wall portion 12W arranged on one side, and the third wall portion 13W arranged on two sides. In addition, the fourth portion 14B may be surrounded by the first wall portion 11W arranged on two sides, the second wall portion 12W arranged on two sides, and the third wall portion 13W arranged on two sides. The fourth portion 14B may be surrounded by the first wall portion 11W arranged on three sides, the second wall portion 12W arranged on two sides, and the third wall portion 13W arranged on one side. The fourth portion 14B may be surrounded by the first wall portion 11W arranged on five sides, and the second wall portion 12W arranged on one side. The fourth portion 14B may be surrounded by the first wall portion 11W arranged on four sides, and the second wall portion 12W arranged on two sides.

[0111] The fourth area 14 is divided into Figure 1F Here, it refers to a region between the upper end of the second wall 12B and the upper end of the third wall portion 13W across the fourth portion 14B.

[0112] The fourth region 14 may include one or more fourth portions 14B. The fourth region 14 may be disposed outside the first region 11 or the third region 13 or outside a portion of the first region 11 or the third region 13.

[0113] The fourth portion 14B may be the same shape and size as the first portion 11B. When a plurality of fourth portions 14B are provided, it is preferred that all of the above regions have the same planar shape and the same size. In addition, in the fourth region 14, the fourth portions 14B are preferably provided so as to form the same plane. In other words, the fourth portions 14B are preferably all provided at the same height, for example, relative to the upper surface of the first wall portion 11W. In addition, the fourth portion 14B is preferably provided at the same height relative to the upper end of the first wall portion 11W so as to form the same plane as the first portion 11B and / or the third portion 13B.

[0114] The first wall portion 11W, the second wall portion 12W, and the third wall portion 13W are as described above.

[0115] (Fifth Region 15)

[0116] The reflective member 10 may also have a fifth region 15. The fifth region 15 is arranged outside the first region 11. The fifth region 15 may be arranged adjacent to the first region 11 in part or in whole, or may be arranged separated from the first region 11 in part or in whole. The fifth region 15 is preferably arranged adjacent to the outer edge of the reflective member 10.

[0117] The fifth region 15 may be arranged outside the first region 11 and adjacent to one or more of the second portion 12B, the first region 11 , the second region 12 , the third region 13 , and the fourth region 14 .

[0118] For example, the fifth region 15 is a region including the fifth portion 15B as the bottom. The fifth portion 15B may be the same shape and the same size as the first portion 11B, or may be a different shape and a different size from the first portion 11B. For example, the fifth region 15 may be exemplified as an area of ​​60% to 120% of the first portion 11B when viewed from above. The size and shape of the fifth region 15 may be appropriately set according to the shape of the reflective component. That is, in the case where a plurality of fifth portions 15B are arranged in the fifth region 15, the shapes, sizes, etc. of the fifth portions may also be partially or completely different from each other. The fifth portion 15B is preferably arranged to form the same plane in the fifth region 15. As another angle, the fifth portion 15B is preferably all arranged at the same height, for example, relative to the upper end of the first wall portion 11W. In addition, the fifth portion 15B is preferably arranged at the same height as the first portion 11B, the third portion 13B or the fourth portion 14B relative to the upper end of the first wall portion 11W.

[0119] The fifth region 15 is connected to the fourth wall portion 14W arranged at the outer edge of the reflective member. The fifth region 15 may be a region having a first wall portion 11W connected to the fifth portion 15B (in Figure 2C The fifth region 15 may also be a region having a first wall portion 11W and a second wall portion 12W connected to the fifth portion 15B. The fifth region 15 may also be a region having a first wall portion 11W, a second wall portion 12W, and a third wall portion 13W connected to the fifth portion 15B (in Figure 1C , Figure 2C The fifth region 15 may also be a region having the first wall portion 11W and the third wall portion 13W connected to the fifth portion 15B. The fifth region 15 may also be a region having the second wall portion 12W and the third wall portion 13W connected to the fifth portion 15B (in Figure 2C 15t in the middle).

[0120] For example, Figure 1A As shown in the figure, when the fifth portion 15B is a quadrilateral or a shape similar thereto, the fifth region may also have the fifth portion 15B and the first wall portions 11W on three sides. In addition, the fifth region 15 may also have the fifth portion 15B, the first wall portions 11W on two sides, and the second wall portion 12W on one side. The fifth region 15 may also have the fifth portion 15B, the first wall portion 11W on one side, the second wall portion 12W on one side, and the third wall portion 13W on one side. The fifth region 15 may also have the fifth portion 15B, the first wall portions 11W on two sides, and the third wall portion 13W on one side. In addition, as Figure 2A As shown in the figure, when the fifth portion 15B is a regular hexagon or a shape similar thereto, the fifth region may also include the fifth portion 15B and the first wall portions 11W of four sides. The fifth region 15 may also include the fifth portion 15B, the first wall portions 11W of three sides, the second wall portion 12W of one side, and the third wall portion of one side. The fifth region 15 may also include the fifth portion 15B, the first wall portions 11W of two sides, the second wall portion 12W of one side, and the third wall portion 13W of one side. The fifth region 15 may also include the fifth portion 15B, the second wall portions 12W of two sides, and the third wall portions 13W of three sides. The fifth region 15 may also include the fifth portion 15B, the first wall portions 11W of two sides, the third wall portions 13W of two sides, and the second wall portion 12W of one side. The partition area of ​​the fifth region 15 refers to the area between the upper end of the fourth wall portion 14W and the first wall portion 11W opposite to the fourth end portion 14W across the fifth portion 15B.

[0121] (Fourth wall portion 14W)

[0122] like Figure 1E to Figure 1G and Figure 2D to Figure 2G As shown, the reflective member further preferably has a fourth wall portion 14W. The fourth wall portion 14W may be partially interrupted at the outer edge of the reflective member 40 to form a space, or may be arranged over the entire outer periphery.

[0123] The fourth wall portion 14W is preferably configured in connection with the second portion 12B or the fifth portion 15B configured adjacent to the outer edge of the reflective component 10. Compared with the case where the fourth wall portion 14W and the fifth portion 15B are connected and configured, the height of the wall itself is lower when the fourth wall portion 14W is connected and configured with the second portion 12B. However, even in the case where both are connected, the height of the upper end of the fourth wall portion 14W is the same height as the first wall portion 11W, preferably the same height as the height of the first wall portion 11W from the first portion. The fourth wall portion 14W is configured to stand up from the outer edge of the second portion 12B or the fifth portion 15B (that is, the direction orthogonal to the X direction and the Y direction, i.e., the Z direction). The fourth wall portion 14W can stand vertically or tilted relative to the second portion 12B or the fifth portion 15B. The inclination angle of the fourth wall portion 14W is the same as that of the first wall portion 11W and the third wall portion 13W, for example, 45 degrees to 80 degrees.

[0124] As described above, the fourth wall portion 14W of the reflective component 10 is arranged at the outer edge of the reflective component when viewed from above. The reflective component 10 is preferably arranged so that the first wall portion 11W, the second wall portion 12W and the third wall portion 13W surround each bottom portion. For example, the first wall portion 11W, the second wall portion 12W and the third wall portion 13W are preferably connected and arranged in a frame shape, and are regularly extended in the vertical and horizontal directions, rows and columns, or in a matrix shape. The upper ends of the connected walls are preferably arranged in a triangular, quadrilateral or hexagonal frame shape when viewed from above. In other words, the first wall portion 11W, the second wall portion 12W and the third wall portion 13W correspond to the number and positions of the light sources 9 arranged on the substrate 8 as described later, and when viewed from above, for example, the four first division areas in the first area 11 are adjacent, and the upper ends of the four first wall portions 11W are connected at one position (refer to Figure 1A ). In addition, the first wall portion 11W, the second wall portion 12W and the third wall portion 13W may also be as follows Figure 2A and Figure 3 As shown in FIG. 1 , three first regions 11 and the like are adjacent, and the upper ends of three first walls 11W and the like are connected at one position. The first wall 11W, the second wall 12W, and the third wall 13W may also be such that six first regions 11 and the like are adjacent, and the upper ends of six first walls 11W and the like are connected at one position. In other words, the above-mentioned walls are preferably arranged in a plane filling shape. For example, the spacing between the upper ends of the first wall 11W, the second wall 12W, and the third wall 13W (in Figure 1FThe spacing between the upper ends of the first wall portion 11W, the second wall portion 12W, and the third wall portion 13W can be, for example, 1 mm to 50 mm, preferably 5 mm to 20 mm, and more preferably 6 mm to 15 mm. In particular, the spacing between any of the first wall portion 11W, the second wall portion 12W, and the third wall portion 13W is preferably the same.

[0125] The second wall portion 12W and the third wall portion 13W are the same as the first wall portion 11W, and the upper end thereof may be a plane or a ridge formed by at least two walls surrounding the adjacent area. Figure 1D to Figure 1G and Figure 2D to Figure 2G As shown, the longitudinal sections of at least two wall portions constituting the top preferably form a triangle (the corners may also be rounded), and more preferably form an equilateral triangle. The triangle or equilateral triangle is also preferably an acute triangle or an acute equilateral triangle. In this way, the space and area occupied by the reflective component 10 can be reduced, the height of the reflective component 10 can be reduced, and the light source device can be made thinner. The fourth wall portion 14W also preferably has a longitudinal section that forms the side of an acute triangle.

[0126] In addition, it is preferable that at least the first portion 11B, the third portion 13B, and the fourth portion 14B of the reflective member 10 are arranged in a planar filling state together with a wall portion surrounding the above portions.

[0127] The reflective member 10 preferably has a through hole 16 for mounting a light source formed near the center (or center of gravity) of the bottom of each part, for example, approximately in the center, in the first part 11B, the third part 13B, the fourth part 14B, and the fifth part 15B. The shape and size of the through hole 16 can be set according to the shape and size of the light source used, and can be a shape and size that exposes the light source 9. It is preferred that the through hole 16 be set so that the inner edge is only located near the light source 9. Thus, even in the first part 11B, the third part 13B, the fourth part 14B, and the fifth part 15B, the light from the light source can be reflected, and the light extraction efficiency can be improved. For example, the through hole 16 can be a polygon such as a circle, an ellipse, a triangle, a quadrilateral, or a planar shape similar to the above shapes, and the maximum length of the through hole 16 in a top view can be set to 0.5 mm to 25 mm.

[0128] exist Figure 1E to Figure 1G In the example shown, there is a cavity in each wall portion of the reflective member 10. However, the cavity may be made of the same material as the wall portion or a different material. Alternatively, each wall portion of the reflective member 10 may be solid instead of being hollow.

[0129] The bottom portion (first portion 11B, third portion 13B, fourth portion 14B, and fifth portion 15B) of the reflective member 10 may have a thickness of, for example, 100 μm to 300 μm. The first to fourth walls of the reflective member may have the same thickness as the bottom portion or may have different thicknesses.

[0130] The reflective member 10 may be molded using a resin containing a reflective material formed of particles of titanium dioxide, aluminum oxide, silicon dioxide, or the like, or may be molded using a resin containing no reflective material and then provided with a reflective material or a reflective film on the surface.

[0131] The reflector 10 can be a rigid component, a flexible component, or a component having a partially rigid and flexible portion. In addition, the reflector 10 can be a flat component constituting a plane, a component constituting a curved surface, or a component configured by combining the above components.

[0132] The reflective component 10 can be formed by molding using a mold, a molding method using stereolithography, etc. As a molding method using a mold, a molding method such as injection molding, extrusion molding, compression molding, vacuum molding, and stamping molding can be applied. For example, a reflective sheet formed of PET or the like is vacuum molded or stamped, and cut into a predetermined shape, and a through hole is formed, thereby forming a reflective component 10 integrally formed with a wall portion, a bottom portion, etc.

[0133] (Light source device)

[0134] like Figure 6 and Figure 7 As shown in FIG. 1 and FIG. 2 , a light source device according to an embodiment of the present invention includes a substrate 8 , a light source 9 , and the above-mentioned reflecting member 10 .

[0135] (Reflection member 10)

[0136] In the light source device, the reflective component 10 is preferably arranged on the substrate 8, and the lower surface of the bottom of the reflective component 10 and the upper surface of the substrate 8 are preferably fixed. In particular, it is preferred to use a light-reflective adhesive component to fix the periphery of the through hole 16 so that the emitted light from the light source 9 does not enter between the substrate 8 and the reflective component 10. For example, it is more preferred to configure the light-reflective adhesive component in a ring shape along the outer edge of the through hole 16. The adhesive component can be a double-sided tape, a hot-melt adhesive sheet, or a resin adhesive such as a thermosetting resin and a thermoplastic resin. The above-mentioned adhesive component preferably has high flame retardancy.

[0137] Alternatively, the reflective member 10 may be fixed to the substrate 8 using screws or the like.

[0138] By utilizing the above-mentioned reflective component, in any case where the light source device is a polygon such as a square or rectangle, or is in an irregular shape along the shape of a meter, etc., the light sources cannot be regularly arranged near its outer edge, and the generation of dark areas when observed from the light extraction surface side can be effectively avoided.

[0139] (Light Source 9)

[0140] like Figure 4 As shown, a plurality of light sources 9 are arranged on the substrate 8. Specifically, the light sources 9 are arranged on the substrate 8 and inside each through hole 16 at the bottom of the reflective member 10 arranged on the substrate 8. However, in the fifth region 15, depending on the shape of the reflective member, sometimes the through hole 16 of the same shape and size as the first portion 11B cannot be formed in the fifth portion 15B, and even if the through hole is formed, the bottom of the light source is not arranged in the fifth portion 15B.

[0141] The light source 9 is a component that emits light, and includes, for example, a self-luminous light-emitting element, a light source that seals the light-emitting element with a light-transmitting resin, and a surface-mounted light-emitting device (also called an LED) that packages the light-emitting element. The plurality of light sources 9 are preferably arranged on the substrate 8 in each partition area of ​​the reflective component, and are regularly arranged in a vertical and horizontal, row and column, or matrix shape. In this way, uneven brightness within the surface can be suppressed. In other words, the plurality of light sources 9 are preferably arranged in a Figure 1A The through holes 16 are arranged regularly in rows and columns, or as shown in FIG. Figure 2A and Figure 3 As shown, they are regularly arranged in the row direction, and are regularly arranged in the column direction by shifting the light sources 9 in the row direction by half the amount (length) so as to be arranged between the light sources 9 in adjacent rows.

[0142] For example, Figure 4 As shown, as the light source 9, a light source in which a light emitting element 7 is covered by a sealing member 5 can be exemplified. The light source 9 may use one light emitting element 7, or may use a plurality of light emitting elements 7 as one light source.

[0143] The light source 9 preferably emits light with a wide light distribution in order to reduce uneven brightness in each area surrounded by the wall portion of the reflective member 10 described later. Figure 5 The batwing light distribution characteristic shown in the figure is thus reduced, the amount of light emitted in the direction directly above the light emitting element 7 is reduced, the light distribution of each light source is expanded, and the expanded light is irradiated to the reflective member 10, thereby reducing the uneven brightness of each area surrounded by the wall.

[0144] Here, the so-called batwing light distribution characteristic is defined as a light intensity distribution having a light intensity higher than 0 degrees within an angle where the absolute value of the light distribution angle is greater than 0 degrees, with the optical axis L being 0 degrees. Figure 4 As shown, the so-called optical axis L is defined by a line that passes through the center of the light source 9 and perpendicularly intersects a line on the plane of the substrate 8 described later.

[0145] In particular, as a light source 9 having a bat-wing light distribution characteristic, for example Figure 4 As shown, a light source using a light emitting element 7 having a light reflecting film 6 on the upper surface can be exemplified. As a result, the light directed upward by the light emitting element 7 is reflected by the light reflecting film 6, and the amount of light directly above the light emitting element 7 is suppressed, so that a batwing light distribution characteristic can be obtained. It should be noted that in order to achieve a batwing light distribution, a lens may be combined separately.

[0146] The light reflecting film 6 formed on the upper surface of the light emitting element 7 can be any one of a metal film such as silver or copper, a dielectric multilayer film (DBR film), a white resin, or a combination thereof. The light reflecting film 6 preferably has an angle dependence of reflectivity with respect to the incident angle relative to the emission wavelength of the light emitting element 7. Specifically, the reflectivity of the light reflecting film 6 is preferably set so that the reflectivity at oblique incidence is lower than that at vertical incidence. As a result, the brightness directly above the light emitting element changes slowly, and it is possible to prevent the light directly above the light emitting element from becoming extremely dim, such as a dark spot.

[0147] In the light source 9, for example, the height of the light emitting element 7 mounted directly on the substrate can be 100 to 500 μm. The thickness of the light reflecting film 6 can be 0.1 to 3.0 μm. Even including the sealing member 5 described later, the thickness of the light source 9 can be about 0.5 to 2.0 mm.

[0148] The plurality of light sources 9 are preferably independently drivable and are disposed on a substrate 8 described later so that dimming control (eg, local dimming or HDR (High Dynamic Range)) can be performed on each light source.

[0149] (Light-emitting element 7)

[0150] As the light emitting element 7, a known element can be used. For example, a light emitting diode is preferably used as the light emitting element. The light emitting element can be selected from elements of any wavelength. For example, as blue and green light emitting elements, light emitting elements using nitride semiconductors can be used. In addition, as red light emitting elements, GaAlAs, AlInGaP, etc. can be used. In addition, semiconductor light emitting elements formed of materials other than these can also be used. The composition, light color, size, number, etc. of the light emitting element used can be appropriately selected according to the purpose.

[0151] like Figure 4 As shown, the light emitting element 7 can be flip-chip mounted on the substrate 8 via the bonding component 3. The light emitting element 7 can also be mounted face up. The bonding component 3 is a component for fixing the light emitting element 7 to the substrate or the conductor wiring, and can be, for example, an insulating resin or a conductive component. Figure 4 In the case of flip chip mounting as shown, a conductive member is used. Specifically, Au alloy, Ag alloy, Pd alloy, In alloy, Pb-Pd alloy, Au-Ga alloy, Au-Sn alloy, Sn alloy, Sn-Cu alloy, Sn-Cu-Ag alloy, Au-Ge alloy, Au-Si alloy, Al alloy, Cu-In alloy, and a mixture of metal and flux can be cited.

[0152] (Sealing component 5)

[0153] The sealing component 5 covers the light emitting element for the purpose of protecting the light emitting element from the external environment and optically controlling the light output from the light emitting element. The sealing component 5 is formed of a light-transmitting material. As the material, light-transmitting resins such as epoxy resin, silicone resin, or a resin obtained by mixing the above resins, glass, etc. can be used. Among the above resins, silicone resin is preferably used in consideration of light resistance and the difficulty of molding. The sealing component 5 may also contain a wavelength conversion material such as a phosphor that absorbs light from the light emitting element and emits light of a different wavelength from the output light from the light emitting element, a diffusing agent for diffusing the light from the light emitting element, and a colorant corresponding to the light emission color of the light emitting element.

[0154] As the phosphor, the diffusing agent, the coloring agent, and the like, materials known in the relevant field can be used.

[0155] The sealing member 5 does not necessarily need to be in direct contact with the substrate 8 .

[0156] The sealing member 5 can be adjusted to a viscosity that can be printed, applied by a dispenser, etc., and can be hardened by heating or light irradiation. The sealing member 5 can be formed into, for example, a substantially hemispherical shape, a convex shape that is longitudinally long in cross-section (a shape in which the length in the Z direction is longer than the length in the X direction in cross-section), a flat convex shape in cross-section (a shape in which the length in the X direction is longer than the length in the Z direction in cross-section), a circular shape or an elliptical shape in top view.

[0157] The sealing member 5 may be disposed between the lower surface of the light emitting element 7 and the upper surface of the substrate 8 as the underfill 5 a .

[0158] (Substrate 8)

[0159] The substrate 8 is a component for configuring a plurality of light sources 9, such as Figure 4As shown, the upper surface thereof has wiring layers 4A and 4B for supplying power to light sources 9 such as light emitting elements 7. Preferably, the covering member 2 covers a portion of the wiring layers 4A and 4B in the region not electrically connected to the light emitting elements.

[0160] The material of the substrate 8 may be any material as long as it can insulate and separate at least a pair of wiring layers 4A and 4B. For example, ceramics, resins, composite materials, etc. may be cited. As resins, phenolic resins, epoxy resins, polyimide resins, BT resins, polyphthalamide (PPA), polyethylene terephthalate (PET), etc. may be cited. As composite materials, materials obtained by mixing inorganic fillers such as glass fiber, SiO2, TiO2, Al2O3, etc. in the above resins, glass fiber reinforced resins (glass epoxy resins), metal substrates with insulating layers formed on metal parts, etc. may be cited.

[0161] The thickness of the substrate 8 can be appropriately selected, and can be any flexible substrate or rigid substrate that can be manufactured by a roll-to-roll production method. The rigid substrate can also be a thin, flexible rigid substrate.

[0162] The wiring layers 4A and 4B may be formed of any material as long as they are conductive members, and generally, materials used as wiring layers of circuit boards, etc. may be used. A plating film, a light reflecting film, etc. may be formed on the surface of the conductor wiring.

[0163] The cover member 2 is preferably formed of an insulating material. The material may be the same as the material exemplified as the substrate material. The cover member can prevent light leakage or absorption and improve the light extraction efficiency of the light source device by using a material containing a white coloring agent in the above-mentioned resin.

[0164] (Other parts)

[0165] like Figure 6 and Figure 7 As shown, the light source device of this embodiment preferably also includes: a diffuser 17 and / or a diffuser 22, a wavelength conversion sheet 23, a prism sheet 24, a polarizer 25, an outer substrate 27 having a reflection wall surrounding the periphery of the substrate, and a cover substrate 26 having a reflection wall surrounding the periphery of the reflection component. In addition, the above components can be arbitrarily laminated via an adhesive layer and / or a reflection layer 28, 29, 31, etc. In the above light source device, a liquid crystal panel, etc. can be arranged thereon to become a surface emitting light source device used as a light source for a direct-type backlight. The order of laminating the above optical components can be set arbitrarily.

[0166] (Diffusing plate 17 and / or diffusing sheet 22)

[0167] The diffuser 17 and / or the diffuser sheet 22 (hereinafter referred to as the diffuser 17) are components that diffuse and transmit incident light, and preferably one diffuser is arranged above the plurality of light sources 9. The diffuser 17 is preferably arranged so as to be substantially in contact with the upper ends of the first wall portion 11W and the fourth wall portion 14W. The diffuser 17 may have projections and depressions on its surface, or may be a flat plate-like component. The diffuser 17 is preferably arranged substantially parallel to the substrate 8. The diffuser 17 may be made of a material that absorbs less visible light, such as a polycarbonate resin, a polyethylene resin, or an acrylic resin, for example. In order to diffuse the incident light, the diffuser 17 may have projections and depressions on its surface, or materials with different refractive indices may be dispersed in the diffuser 17.

[0168] The size of the projections and recesses may be, for example, 0.01 mm to 0.1 mm.

[0169] As the material having different refractive indexes, for example, a material selected from polycarbonate resin, acrylic resin, etc. can be used.

[0170] The thickness of the diffusion plate 17 and the degree of light diffusion can be appropriately set, and commercially available components such as light diffusion sheets and diffusion films can be used. For example, the thickness of the diffusion plate 17 can be 1 mm to 2 mm.

[0171] When the walls of the reflective member 10 are arranged at a pitch P, the diffuser 17 is preferably arranged such that the distance between the diffuser and the light source, that is, the height OD, is, for example, 0.3P or less, and preferably 0.25P or less. Figure 1H As shown, the height OD represents the distance (OD1) from the outermost surface of the substrate 8, that is, when the substrate 8 has the covering member 2, the wiring layers 4A, 4B, etc. on its surface, to the lower surface of the diffuser 17. From another perspective, the diffuser 17 is preferably 1.5 mm to 5 mm away from the upper surface of the bottom surface 10c of the reflective member 10, and more preferably 2 mm to 3 mm away.

[0172] (Wavelength conversion sheet 23)

[0173] The wavelength conversion sheet 23 can be disposed on any surface of the upper surface or the lower surface of the diffusion plate 17, or can be disposed on any surface of the diffusion plate 17. Figure 6 and Figure 7As shown, it is arranged on the upper surface of the diffuser plate 17 and / or the diffuser sheet 22. The wavelength conversion sheet 23 absorbs a part of the light emitted from the light source 9, and emits light with a wavelength different from the wavelength of the light emitted from the light source 9. For example, the wavelength conversion sheet 23 can be a light source device that absorbs a part of the blue light from the light source 9, emits yellow light, green light and / or red light, and emits white light. Because the wavelength conversion sheet 23 is separated from the light-emitting element of the light source 9, phosphors that are difficult to use near the light-emitting element and have poor heat resistance or light resistance can be used. Thereby, the performance of the light source device as a backlight source can be improved. The wavelength conversion sheet 23 has a sheet or layer shape and contains the above-mentioned phosphors.

[0174] (Prism 24)

[0175] The prism sheet 24 has a shape in which a plurality of prisms extending in a predetermined direction are arranged on its surface. When the prism sheet 24 is observed in two dimensions in the X direction and the Y direction perpendicular to the X direction, for example, a sheet having a plurality of prisms extending in the Y direction and a sheet having a plurality of prisms extending in the X direction can be laminated for use. The prism sheet can refract light incident from various directions in the direction of the display panel opposite to the light source device. Thus, the light emitted from the light emitting surface of the light source device can be emitted mainly in a direction perpendicular to the upper surface, thereby improving the brightness when the light source device is observed from the front.

[0176] (Polarizer 25)

[0177] The polarizer 25 can selectively transmit light in a polarization direction consistent with the polarization direction of a polarizer disposed on the backlight side of a display panel, such as a liquid crystal display panel, and reflect polarization in a direction perpendicular to the polarization direction toward the prism sheet 24. The polarizer 25, the prism sheet 24, and the like can use sheets sold on the market as optical components for backlight sources.

[0178] (Cover substrate 26 and / or exterior substrate 27, adhesive layer and / or reflective layers 28, 29, 31)

[0179] The cover substrate 26 is a member that has a reflection wall surrounding the outer periphery of the reflection member 10 and covers and presses the upper outer edges of the reflection member 10 and the optical members such as the diffusion plate 17 to fix or support them.

[0180] The exterior substrate 27 has a reflection wall surrounding the outer periphery of the substrate 8 and covers the substrate 8 from the rear surface side.

[0181] The cover substrate and the exterior substrate prevent the light emitted from the light emitting device from leaking outside the reflective wall, that is, outside the light source device, by making the reflective walls abut or mesh with each other, thereby improving the brightness of the light emitting surface.

[0182] The above-mentioned member can be formed of various materials such as resin, metal, ceramics, etc. containing a reflective material, as long as it can reflect the light emitted from the light emitting device.

[0183] The adhesive layer and the reflective layer may be made of materials that bond the upper and lower components and reflect the direct and indirect light emitted from the light emitting device, for example, double-sided tape, hot-melt adhesive sheets, thermosetting resins, thermoplastic resins and other resin adhesives.

[0184] First embodiment

[0185] like Figure 1A to Figure 1I As shown, the shape of the reflector 10 of this embodiment is similar to a trapezoid with straight and curved sides, and the area corresponding to the upper and lower corners is a circular irregular shape with different curvatures. For example, the maximum width of the reflector in the X direction is 700 mm, and the maximum width in the Y direction is 125 mm.

[0186] The reflective member 10 has: a plurality of bottoms regularly arranged in the vertical and horizontal directions, wall portions respectively surrounding the bottoms and connected to the bottoms, and a wall portion surrounding the outer edge of the reflective member 10. The bottom is, for example, a square of 6.6 mm×6.6 mm, and the upper end of the wall portion is arranged in a square frame shape in a plan view.

[0187] The reflecting member 10 has a first region 11 on the inner side, and has a third region 13, a fourth region 14, a fifth region 15, and a second region 12 on the outer side of the first region 11. The third region 13 is adjacent to the first region 11. The fourth region 14 is adjacent to the first region 11, the third region 13, and the fifth region 15. In addition, the fourth region 14 is also adjacent to the first region 11, the second region 12, the third region 13, and the fifth region 15. The second region 12 and the fifth region 15 are adjacent to the outer edge of the reflecting member.

[0188] The first region 11 has a first portion 11B and a first wall portion 11W.

[0189] The second region 12 has a second portion 12B. The second portion 12B is disposed at a higher position than the first portion 11B. The second portion 12B is connected to a second wall portion 12W having a lower height than the first wall portion 11W on the side close to the first region 11 .

[0190] The third region 13 includes a third portion 13B, a first wall portion 11W, and a third wall portion 13W.

[0191] The fourth region 14 includes the fourth portion 14B, the first wall portion 11W, and the second wall portion 12W, or the first wall portion 11W, the second wall portion 12W, and the third wall portion 13W.

[0192] The fifth region 15 includes the fifth portion 15B, the first wall 11W, the first wall 11W and the second wall, the first wall 11W, the second wall and the third wall, or the first wall 11W and the third wall. The fifth portion 15B is connected to the fourth wall surrounding the outer edge of the reflector 10 .

[0193] The first part 11B, the third part 13B, and the fourth part 14B are of the same size and shape and are configured at the same height. In other words, the first part 11B, the third part 13B, and the fourth part 14B are configured to form the height of the same plane. The fifth part 15B corresponds to the profile of the reflective component, and the shapes and sizes of the fifth parts 15B may be partially or completely different from each other. However, the fifth part 15B may also have a part of the same size and shape as the first part 11B.

[0194] The second portion 12B has a smaller area when viewed from above than the first portion 11B. The second portion 12B corresponds to the profile of the reflective member, and the second portions may be partially or completely different in shape and size. The second portion 12B is located, for example, at a height of 1 mm from the first portion 11B.

[0195] The height of the first wall portion 11W is the same as that of the fourth wall portion 14W. That is, the upper ends of the first wall portion 11W and the fourth wall portion 14W are located at the same position, for example, at a height of 2 mm from the first portion 11B.

[0196] The third wall 13W is lower than the first wall 11W. That is, the upper end of the third wall 13W is 1 mm lower than the upper end of the first wall and 1 mm from the first portion 11B. The upper end of the third wall 13W is configured to be at the same height as the second portion.

[0197] The second wall portion 12W has the same height as the third wall portion 13W. In other words, the upper ends of the second wall portion 12W and the third wall portion 13W are located at the same position.

[0198] The fourth wall portion 14W is connected to the second portion 12B and the fifth portion 15B.

[0199] The cross-sectional shape of the first wall portion 11W and the third wall portion 13W in the XZ plane is an acute triangle. Figure 1H and Fig. 1I As shown, the angle α1 of the top of the first wall portion 11W and the angle α3 of the top of the third wall portion 13W are each 40 degrees, and γ1 and γ3 are each 65 degrees. Figure 1H OD1 in the figure) is 2 mm, and the height of the third wall portion 13W (in Fig. 1I OD3 in the middle is 1mm.

[0200] It should be noted that the reflective component 10 is a component in which a resin sheet containing titanium dioxide in PET is stamped, cut into a predetermined shape, and a through hole is formed, thereby forming a wall portion, a bottom portion, etc. in one piece. The thickness of the reflective component is, for example, 0.2 mm. The through hole is arranged in the center of each bottom portion, and is, for example, a circle with a diameter of 5.5 mm.

[0201] By forming the reflective member in the above-mentioned shape, when it is used in a display device such as an in-vehicle meter, even if there is a partitioned area where no light source is arranged at the outer edge of the reflective member, the light from the light source traveling toward the second area 12 can be effectively reflected by the second portion 12B in accordance with the irregular plane shape. In addition, the light from the light source arranged in the partitioned area (third area 13 or fourth area 14) located outside the first area 11 can be made to travel toward the second area 12 through the third wall 13W whose height is lower than the first wall 11W. Thus, the uneven brightness in the light-emitting surface can be suppressed. In addition, the light from the light source arranged in the first area 11 located inside the reflective member 10 can be made to pass through the first wall 11W and be reflected upward, rather than traveling in the adjacent partitioned area.

[0202] Second embodiment

[0203] like Figure 2A to Figure 2G As shown, the shape of the reflector 20 of this embodiment is similar to a trapezoid with straight edges, and the area corresponding to the upper and lower corners is a circular irregular shape with different curvatures. For example, the maximum width of the reflector in the X direction is 700 mm, and the maximum width in the Y direction is 125 mm.

[0204] The reflective member 20 includes: a plurality of bottoms, wall portions respectively surrounding the bottoms and connected to the bottoms, and a wall portion surrounding the outer edge of the reflective member 20. The bottoms are regular hexagonal, and the upper ends of the wall portions are configured in a regular hexagonal frame shape in a plan view. The bottoms are arranged in parallel in the row direction, and in the column direction, half of the length of the bottoms is offset in the row direction so as to be arranged between the bottoms of adjacent rows and arranged regularly in parallel.

[0205] The reflecting member 20 has the first region 11 on the inner side, and has the third region 13, the fourth region 14, the fifth region 15, and the second region 12 outside the first region 11. Although the third region 13 is adjacent to the first region 11, it is also adjacent to the fourth region 14 and the fifth region 15. The fourth region 14 is also adjacent to the first region 11, the second region 12, the third region 13, and the fifth region 15. The fifth region 15 is adjacent to the first region 11, the second region 12, the third region 13, and the fourth region 14. The second region 12 and the fifth region 15 are adjacent to the outer edge of the reflecting member 20.

[0206] Except for this point, the structure is substantially the same as that of the reflecting member 10 of the first embodiment.

[0207] Third embodiment

[0208] like Figure 3 As shown, the outer shape of the reflecting member 30 of this embodiment is similar to a trapezoid having straight and curved sides, and the regions corresponding to the upper and lower corners thereof are circular irregular shapes having different curvatures.

[0209] The reflective member 30 includes: a plurality of bottoms, wall portions surrounding the bottoms and connected to the bottoms, and a wall portion surrounding the outer edge of the reflective member 30. The bottoms are regular hexagonal, and the upper ends of the wall portions are configured in a regular hexagonal frame shape in a plan view. The bottoms are arranged in parallel in the row direction, and half of the length of the bottoms is offset in the row direction in the column direction so as to be arranged regularly between the bottoms of adjacent rows.

[0210] The reflecting member 30 has the first region 11 inside, and has the fourth region 14, the fifth region 15, and the second region 12 outside the first region 11. The fourth region 14 is adjacent to the first region 11, the second region 12, and the fifth region 15. The fifth region 15 is adjacent to the first region 11, the second region 12, and the fourth region 14. The second region 12 and the fifth region 15 are adjacent to the outer edge.

[0211] In the second region 12, the second portion 12B is divided by a wall portion having the same height as the first wall portion. That is, the second portion 12B is connected to the second wall portion 12W1 on the side close to the first region 11, the fourth region 14, or the fifth region 15, and the second wall portion 12W1 has the same height as the first wall portion 11W and the fourth wall portion 14W. In other words, the second wall portion 12W1 is arranged adjacent to the second portion 12B on the side close to the first region 11, the fourth region 14, or the fifth region 15 of the second portion 12B.

[0212] Except for the above description, the reflecting member 10 of the first embodiment and the reflecting member 20 of the second embodiment have substantially the same structure.

[0213] Industrial Applicability

[0214] The light source device of the present invention can be used in various light source devices such as a backlight light source for a display device, a lighting device, a light source for vehicle-mounted meters, and the like.

[0215] Description of Reference Numerals

[0216] 2 Covering member; 3 Bonding member; 4A, 4B Wiring layer; 5 Sealing member; 5a Bottom filling; 6 Light reflecting film; 7 Light emitting element; 8 Substrate; 9 Light source; 10, 20, 30 Reflecting member; 11 First region; 11B First portion; 11W, 11Wa, 11Wb First wall; 12 Second region; 12B Second portion; 12W, 12W1 Second wall; 13 Third region; 13B Third portion; 13W, 13Wa, 13Wb Third wall; 14 Fourth region; 14B Fourth portion; 14W Fourth wall; 15 Fifth region; 15B Fifth portion; 16 Through hole; 17 Diffusing plate; 22 Diffusing sheet; 23 Wavelength conversion sheet; 24 Prism sheet; 25 Polarizing sheet; 26 Covering substrate; 27 External substrate; 28, 29, 31 Adhesive layer and / or reflective layer.

Claims

1. A reflective component, characterized in that: have: A plurality of first regions, which are surrounded by a plurality of first wall portions in a plan view and are arranged in an array in a plan view; a plurality of second regions arranged outside the first region in a plan view, comprising a second portion whose height decreases from the outside toward the inside, and a second wall portion connected to an inner end of the second portion; The plurality of third regions are arranged between the first region and the second region in a plan view and include at least one third wall portion having a height lower than that of the first wall portion.

2. The reflective component according to claim 1, wherein: The plurality of third regions include regions surrounded by one of the third wall portions, one first wall portion extending in the first direction, and two first wall portions extending in a second direction perpendicular to the first direction.

3. The reflective component according to claim 1, wherein: The at least one third wall portion extends in the same direction as one of the first wall portions, The at least one third wall portion is connected to the other first wall portions.

4. The reflective component according to claim 1, wherein: The second region is arranged over the entire periphery of the reflecting member.

5. A light source device, characterized in that: have: substrate; A plurality of light sources are arranged on the substrate; The reflecting component according to any one of claims 1 to 4.

6. The light source device according to claim 5, characterized in that: The first region has a first portion having a through hole and serving as a bottom, and the light source is disposed in the through hole.

7. The light source device according to claim 5 or 6, characterized in that: The light source is a light source with a bat-wing light distribution.

Images