Reflective material and light source device

Abstract

To provide a reflection member which can inhibit luminance unevenness in a light emission surface, and to provide a light source device.SOLUTION: A reflection member has: a first area including a first portion and a first wall part which encloses the first portion and is continuous with the first portion, the first area having a first compartment area which is defined by the first portion and the first wall part and arranged in a filled plane shape; and a second area disposed at the outer side of the first area in a plan view. The second area has a second portion disposed at a position higher than the first portion. The second portion is continuous with a second wall part lower than the first wall part at the side close to the first area.SELECTED DRAWING: Figure 1A

Description

Technical Field

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[0001] The present disclosure relates to a reflective member and a light source device.

Background Art

[0002] As a direct - type backlight used in liquid crystal televisions, in - vehicle instruments, etc., surface - emitting light source devices have been variously proposed (for example, Patent Documents 1 and 2). Such a light source device has a plurality of light sources arranged in a matrix direction on a substrate, and a light - reflecting wall portion that surrounds and partitions each light source.

Prior Art Documents

Patent Documents

[0003] <000**********19>

Patent Document 1

Patent Document 2

Summary of the Invention

Problems to be Solved by the Invention

[0004] Each partitioned region is preferably the same size and the same shape, and a light source is arranged in each region. However, at the outer edge of the light - reflecting wall portion, there may be a region with a size or shape where it is difficult to arrange a light source. In this case, luminance unevenness may occur in the light - emitting surface.

[0005] The present invention has been made in view of the above problems, and provides a reflective member and a light source device capable of suppressing luminance unevenness in the light - emitting surface.

Means for Solving the Problems

[0005] This application includes the following inventions. (1) A first part and a first wall portion that surrounds the first part and is connected to the first part. The first partition region, defined by the first portion and the first wall portion, is arranged in a planar tiling manner. The first area and, It comprises a second region located outside the first region in a plan view, The second region has a second portion positioned higher than the first portion. The second portion, on the side closer to the first region, has a height lower than the first wall portion. Reflective elements connected to the two walls. (2) comprising a plurality of bottoms and wall portions surrounding each of the bottoms, The outer wall portion located on the outside is larger than the inner wall portion located inside the outer wall portion. The height from the bottom is low, and the multiple inner wall portions are at the same height from the bottom. Shooting member. (3) The substrate and, Multiple light sources arranged on the substrate, The above-mentioned reflective member is disposed on the substrate, The reflective member has a plurality of through-holes arranged in the first, third, and fourth portions. Having through holes, Each of the aforementioned light sources is a light source device located inside the through-hole. [Effects of the Invention]

[0006] According to one embodiment of the present invention, a reflective member and a light source device suppress luminance unevenness within the light-emitting surface. It is possible. [Brief explanation of the drawing]

[0007] [Figure 1A] This is a schematic plan view of a reflective member according to one embodiment of the present invention. [Figure 1B] Figure 1A is a perspective view. [Figure 1C] This is an enlarged view of the main part of Figure 1A. [Figure 1D]It is an enlarged view of the ID-ID line in FIG. 1C. [Figure 1E] It is a cross-sectional view of the IE-IE line in FIG. 1C. [Figure 1F] It is a cross-sectional view of the IF-IF line in FIG. 1C. [Figure 1G] It is a cross-sectional view of the IG-IG line in FIG. 1C. [Figure 1H] It is a partial enlarged schematic cross-sectional view of the first wall portion 11W in FIG. 1A. [Figure 1I] It is a partial enlarged schematic cross-sectional view of the third wall portion 13W in FIG. 1A. [Figure 1J] It is a schematic plan view showing the first partition area of the first region in FIG. 1A. [Figure 2A] It is a schematic plan view of a reflection member according to another embodiment of the present invention. [Figure 2B] It is a perspective view of the main part of FIG. 2A. [Figure 2C] It is an enlarged view of the main part of FIG. 2A. [Figure 2D] It is a cross-sectional view of the IID-IID line in FIG. 2C. [Figure 2E] It is a cross-sectional view of the IIE-IIE line in FIG. 2C. [Figure 2F] It is a cross-sectional view of the IIF-IIF line in FIG. 2C. [Figure 2G] It is a cross-sectional view of the IIG-IIG line in FIG. 2C. [Figure 3] It is a schematic plan view of a reflection member according to yet another embodiment of the present invention. [Figure 4] It is a partial enlarged schematic cross-sectional view around the light-emitting element of the light source device in FIG. 1A. [Figure 5] It is a graph showing the batwing light distribution characteristics of the light-emitting element of the light source device in FIG. 1A. [Figure 6] It is a schematic exploded perspective view of a light source device according to an embodiment of the present invention. [Figure 7] It is a schematic cross-sectional view of the main part of the light source device in FIG. 6.

Embodiments for Carrying out the Invention

[0008] The embodiments of this disclosure will be described below with reference to the drawings as appropriate. The embodiments described herein are intended to embody the technical concept of this disclosure and do not contain any specific descriptions. Unless otherwise stated, this disclosure is not limited to the following. Furthermore, in one embodiment or example, The information provided is applicable to other embodiments and examples. The dimensions of the components shown in each drawing are The relative positions and other details may be exaggerated to clarify the explanation. In this embodiment, the side of the light source of the light source device that extracts light is referred to as the upper surface or upward. Yes. Also, high or high position means being located above, and low or low position means This means it is located on the opposite side from above. Unless otherwise specified, it refers to when viewed from above (flat). In a surface view, the reflective member, substrate, and light source device are considered to have the center side facing inward, and the side opposite the center facing outward. This may occur. Furthermore, cross-sectional views may sometimes use end-view diagrams that show only the cross-section.

[0009] (Reflective material) As shown in Figures 1A to 1J, the reflective member 10 of one embodiment of the present invention, in a plan view, It comprises at least a first region 11, a second region 12, and a second wall portion 12W. The first region 11 is The first part 11B and the first wall portion that surrounds and is connected to the first part 11B The first partitioned area defined by the first part 11B and the first wall part 11W is filled in plan. They are arranged in a tessellation pattern. Here, a tessellation pattern is a pattern in which a finite number of planar figures are arranged in a plane with no gaps between them. It refers to the entire plane that is tiled. The second region 12 is outside the first region 11 in a plan view. It is located to the side. The second region 12 is located at a higher position than the first part 11B. It has a portion 12B. The second wall portion 12W is lower in height than the first wall portion 11W, and the first region On the side closer to region 11, it is connected to the second part 12B. In other words, the reflective member 10 has multiple bottom parts (for example, the first part 11B, etc.) Each of these bottoms is surrounded by a wall (for example, a first wall 11W, etc.). The outer wall portion located on the outside (for example, the third wall portion 13W) is located on the inside of the outer wall portion. The height from the bottom is lower than that of the side wall (for example, the first wall 11W), and the multiple inner wall sections are, The height from the bottom is the same. By using a reflective member with this shape, it is possible to place the light source on the outer edge of the reflective member. To suppress brightness unevenness within the light-emitting surface when there are partitioned areas that cannot be illuminated. This is possible because the second part 12B is positioned higher than the first part 11B. Furthermore, light from a light source located in a partitioned area inside the second region 12 enters the second region When it reaches region 12, it can be efficiently reflected upward by the second part 12B. That is the case.

[0010] The reflective member 10 is a sheet-like member that has been press-formed to create irregularities, and each wall The part can be configured to have a pair of side parts. In this case, the inside of each wall part is hollow. . The reflective member 10 is located in a light source device equipped with multiple light sources, and the light sources are arranged in a light-emitting area. It is used as a partition member that has a wall section for defining the area. A region with a bottom surrounded by one side is also called a partitioned region. The reflective member 10 is It comprises multiple partitioned regions. The partitioned region of the first region is defined as the first part 11B in a cross-sectional view. This refers to the region between the upper ends of the first wall portions 11W that are sandwiched and facing each other (see Figures 1F, 2D, etc.). The partitioned area of ​​a region is sometimes referred to as the first partitioned area. As shown in Figure 1J, in the first wall portion 11W, both sides of the first portion 12B in the X direction The side of the first wall portion 11W located in the X direction is 11Wa, and the side on the opposite side of the X direction is 1 1Wb, the side of the first wall portion 11W located on both sides in the Y direction of the first portion 12B in the Y direction The section is referred to as 11Wc, and the side opposite to the X direction is referred to as 11Wd. In this case, the first partitioned area This includes the first part 11B and the side portion 11 of the first wall portion 11W located on the X-direction side of the first part 11B. Wb and the side portion 11Wa of the first wall portion 11W located on the side opposite to the X direction of the first portion 11B and the side portion 11Wd of the first wall portion 11W located on the Y-direction side of the first portion 11B, and the first portion 11 It consists of the side portion 11Wc of the first wall portion 11W, which is located on the side opposite to the Y direction of B. Each partitioned area is a concave portion defined by the wall and the bottom. As will be described later, through holes and the like may be provided.

[0011] The reflective element has a planar shape, that is, an external shape, such as a square, rectangle, or other polygon, or a circle. It can be an ellipse, or a polygon such as a triangle or quadrilateral, or a circle, ellipse, etc., of various sizes. A shape combining the above shapes (hereinafter sometimes referred to as an irregular shape) is also acceptable. Reflective part Even if there are regions on the outer edge of the material where light sources cannot be arranged regularly, multiple lights The light from the source is reflected toward the light extraction surface in such a way that brightness unevenness within the light-emitting surface is suppressed. It can perform the function of enabling

[0012] The reflective member includes, for example, a first region 11 and a second region 12 as partitioned areas. In addition to these areas, the members further include a third area 13, a fourth area 14, as partitioned areas. It may have one or more fifth regions 15. Also, the reflective member has a fifth region arranged on its outer edge. It may have four wall sections 14W. The first region 11 is connected to the first part 11B and the first part 11B. It comprises a first wall portion 11W. The first wall portion 11W can be referred to as an inner wall portion. The second region 12 comprises a second portion 12B. The second portion 12B is connected to the second wall portion 12W. It is. The third region 13 is connected to the third part 13B and the third part 13B. It comprises a wall section. The third wall section 13W can be referred to as the outer wall section. The fourth region 14 is connected to the fourth part 14B and the fourth part 14B. It is equipped with a wall section. The fifth region 15 is connected to the fifth part 15B and the fifth part 15B. It comprises a wall section. The fifth section is connected to the fourth wall section 14W. In other words, the first region can be called the inner region. Also, the entire perimeter of the first part This is a region where a part (for example, all four sides) is surrounded by the high walls of the first wall section. The second region can be called the outer region. The third region can be called the inner-outer region. Also, at least one region is connected to the third part. This is a region where one wall (for example, one side) is surrounded by the lower wall of the third wall section. The fourth region can be called the outer-inner region. Also, the opposing wall of the fourth part is the third It is an area surrounded by low walls, such as wall sections. The fifth region can be called the outer region. It is the region located on the outer edge of the reflective member. . Furthermore, Part 1 11B, Part 2 12B, Part 3 13B, Part 4 14B and Part 5 Section 15B is referred to as the first bottom, second bottom, third bottom, fourth bottom, and fifth bottom, respectively. There is a match. Also, the second region 12 is a region where no light source is placed. First region 11, third region 13. The fourth region 14 and the fifth region 15 can be light-emitting regions where light sources are placed. However, due to the planar shape of the reflective member 10, a portion of it includes an area where no light source is placed. It's okay to be there.

[0013] (1st area 11) The first region 11 consists of a first bottom portion 11B and a first wall portion 11 surrounding the first portion 11B. This is a region including W. The first region 11 is defined by the first part 11B and the first wall part 11W. This refers to a region where the first partitioned area is arranged in a planar tiling pattern.

[0014] Part 11B is a planar shape such as a circle, ellipse, triangle and quadrilateral. Yes. The first part 11B is preferably a shape that allows for planar tiling. Examples of shapes include squares (Figure 1A, etc.), rectangles, and hexagons (Figures 2A, 23, etc.). The first part 11B may have irregularities on its surface or it may be flat. The first part 11B may be provided with a through hole. The light source is to be placed inside the through hole. This is possible. The first part 11B has an area in which one light source can be placed in one first part 11B. Having it is preferable.

[0015] The first wall section 11W surrounds the entire perimeter of the first part 11B. It is preferable that the first portion 11B is surrounded along the planar shape of 1B. For example, A similar shape that is larger than the planar shape of the first part 11B, which is a square, rectangle, or hexagon, It is preferable that the lower end of the wall portion 11W surrounds the periphery of the first portion 11B. If the planar shape formed by the upper end of the first wall portion 11W surrounding it is a planar tiling type, then planar tiling The first region 11 can be constructed in this form. The first wall portion 11W has a height OD1 (see Figure 1H) from the lower surface of the first portion 11B to its upper end. It is preferable that this height is higher than, for example, the height of the light source placed in the first region 11. The height OD1 of the first wall section 11W is 800% or less of the height of the light source placed in the first region 11. It is possible, preferably 500% or less, and more preferably 300% or less. First wall portion 11 The height OD1 of W is specifically 20 mm or less, and preferably 8 mm or less. For thin light source devices, a thickness of 1 mm to 4 mm is preferable. This is why, as will be explained later... This allows the backlight unit, including optical components such as diffusers, to be made extremely thin. The first wall portion 11W is preferably the same height throughout its entire area. In other words, Preferably, the upper end of the first wall portion 11W is located at the same height within the reflective member 10. The pitch of the first wall section 11W (P in Figure 1F) is determined by the size of the light source used and the intended light source device. The size can be adjusted as appropriate. The pitch of the first wall section 11W is, for example, 1 A range of 5mm to 50mm is possible, with 5mm to 20mm being preferred, and 6mm to 15mm being more preferred. It's nice. In the example shown in Figure 1H, the side of the first wall portion 11W is inclined with respect to the first portion 12B. This inclination angle (γ1 in Figure 1H) can be arbitrarily set by the height OD1 of the first wall section 11W. It is possible to do this, for example, from 45 to 80 degrees. The upper end of the first wall portion 11W is flat. It may be flat, pointed as shown in Figure 1H, etc., or rounded. Good. In other words, the cross-sectional shape of the first wall portion 11W in the cross-section (XZ plane) shown in Figure 1E is It can be a quadrilateral (rectangle, trapezoid, etc.) or a triangle (even if the corners are rounded). The surface of the first wall portion 11W may be flat or have an uneven shape. That's fine.

[0016] (Second area 12) The second region 12 is located higher than the first portion 11B, as shown in Figures 1E, 2D, etc. Furthermore, the second part 12B is positioned closer to the upper end of the first wall portion 11W than the first part 11B. This is the region that includes the second region 12. The second region 12 is located outside the first region 11. 2 may be arranged partially or entirely adjacent to the first region 11, or it may be arranged adjacent to the first region 11. They may be arranged separately in part or in whole. The second region 12 is adjacent to the outer circumference of the reflective member 10. They are arranged in contact with each other. The second part 12B is a fourth wall located on the outer edge of the reflective member, which will be described later. It is connected to part 14W. In this case, the second region 12 is completely separated from the first region 11. They may also be arranged in that way. As described above, the reflective member 10 of this embodiment, in plan view, has the following characteristics on its outer circumference: The partitioned area cannot accommodate a light source, nor can it be arranged in a predetermined shape and size. Therefore, in the second region 12 located at the outermost edge, the shape corresponding to the first part 11B is A second part 12B, which is different in shape, is positioned.

[0017] The second region 12 may be defined even if the second portion 12B is partitioned by a wall of the same height as the first wall. Furthermore, it does not need to be partitioned. Also, the second region 12 has one second part 12B arranged therein. Alternatively, multiple second parts 12B may be arranged at positions far apart from each other. It is preferable that the area of ​​the second part 12B in a plan view is smaller than that of the first part 11B. For example, the area of ​​95% to 5% of the first part 11B in plan view is given. However, If adjacent second parts are connected, the area in plan view will be larger than that of the first part. This can happen. The planar shape of the second part 12B can be various shapes depending on the outer shape of the reflective member 10. It is possible. The second part 12B may have irregularities on its surface or it may be flat. However, the second part 12B only needs to be positioned higher than the first part 11B. It is sufficient that it is positioned lower than the upper end of the first wall portion 11W. For example, the second portion 12B The lowest point is located between 50% and 80% of the height OD of the first wall 11W, and between 50% and 6%. It is preferable that it be positioned within 5%. The second part 12B has a constant height throughout. Alternatively, the second part 12B may be inclined with respect to the upper surface of the first part 11B. If it is angled, the height of the second part may be made lower as it approaches the first region 11, or it may be made higher It may be done. If the height of the second part is made lower as it approaches the first region, the second region 12 The light from the light source that reaches it can be efficiently reflected upwards. The second part 12B is tilted. If this is done, the first part 11B of the first region 11 should be set to, for example, 30 degrees or less. Yes, it is possible. By providing such a portion on the outer edge of the reflective member, the light can travel from the inside of the reflective member. The light can be reflected upward at the outer edge, suppressing brightness unevenness within the light-emitting surface. It can be used to one's advantage in the system. The second portion 12B is lower than the upper end of the first wall portion 11W on the side closer to the first region 11. It is connected to the second wall section 12W at the same height. In this case, the second part 12B is connected to the second wall section 12W They may be connected in the middle of the height, or, as shown in Figure 1E, they may be connected to the upper end of the second wall section 12W. It's okay to do that. In other words, on the side of the second region 12 that is closer to the first region 11, adjacent to the second region 12, The second wall section 12W is positioned.

[0018] (Third Area 13) The reflective member 10 preferably further comprises a third region 13. The third region 13 is the first It is located outside of region 11. The third region 13 is located outside the first region 11, It is located adjacent to region 11. Furthermore, the third region 13 is located inside the second region 12. It is being done. The third region 13 consists of the base third part 13B and the third part 1 surrounding the third part 13B. This region includes the first wall portion 11W and the third wall portion 13W, which are arranged in conjunction with 3B. Therefore, the third region 13 is surrounded all around by the first wall 11W and the third wall 13W. This refers to a region in which one or more, preferably multiple, partitioned areas of the third part 13B are arranged. Here, The partitioned area in the three regions is a third part 13B and a first wall portion 1 surrounding its entire perimeter. 1W and the third wall portion 13W, between the upper ends of the opposing first wall portion 11W and the third wall portion 13W This refers to the region (see Figure 1E, etc.). The third region 13 may have one third part 13B, or multiple third parts 13B They may be arranged in this way. Also, the third region 13 may be arranged outside each of the first regions 11. They may be located outside a portion of the first region 11.

[0019] The third part 13B can have the same shape and size as the first part 11B. When the third part 13B is placed, all of them have the same planar shape and the same size. This is preferable. Also, in the third region 13, the third portion 13B is the same in whole or in part. It is preferable that they are arranged to form a plane. In other words, the third part 13B is It is preferable that all of them are positioned at the same height, for example, with respect to the upper end of the first wall portion 11W. Furthermore, the third part 13B is constructed in the same plane as the first part 11B, with the first wall It is preferable that the part is positioned at the same height as the upper end of section 11W. For example, as shown in Figure 1A, the shape of the third part 13B in plan view is a rectangle. In this case, the third part 13B is, for example, a first wall portion 11W arranged on one side and a third wall portion arranged on three sides. It is surrounded by the wall section 13W. Also, as shown in Figure 2A, etc., the third section 13B is a regular hexagon. In that case, the third part 13B is, for example, a third wall portion 13W arranged on one side and arranged on five sides It is surrounded by the first wall section 11W. The third wall section 13W is part of the wall section that surrounds the outer perimeter of the third section 13B. The third wall portion 13W has a height OD3 from the lower surface of the third portion 13B to its upper end (see Figure 1I). ) is lower than the height OD1 of the first wall section 11W (see Figure 1H). By including W, light from the light source where the third region 13 is located is directed upward of the third wall portion 13W. It can pass through and reach the second region 12 side. This allows it to move upward from the second region 12. The amount of light extracted can be increased. Specifically, the height of the third wall section 13W is the third region The height of the light source placed in area 13 can be 500% or less, and 300% or less is preferable. Furthermore, a value of 200% or less is preferable. Specifically, the height of the third wall 13W should be 10 mm or less. Examples include, and 4 mm or less is preferred. In other words, the third wall portion 13W is the third portion 13B One example is that the height OD3 from the first wall 11W is between 50% and 90% of the height OD1. The third wall portion 13W, along its entire length, It is preferable that they be at the same height. In other words, the third wall portion 13W is the same height as the second wall portion 12W. It is preferable that the first part 11B is at the same height.

[0020] In the example shown in Figure 1I, the side of the third wall portion 13W is inclined with respect to the third portion 13B. This inclination angle (γ3 in Figure 1I) can be arbitrarily set by the height OD3 of the third wall 13W. It can be adjusted, for example, from 45 to 80 degrees. The upper end of the third wall portion 13W is flat. It can be flat, pointed, or rounded, as shown in Figure 1I, etc. Good. In other words, the third wall section 13W has a rectangular cross-sectional shape (rectangle, trapezoid, etc.) in the XZ plane. It may be a triangle (even if the corners are rounded). The partitioned area of ​​the third region 13 is, in Figure 1E, the third wall portion 13, flanked by the third portion 13B. This refers to the region between the upper end of W and the upper end of the first wall portion 11W. The surface of the third wall portion 13W is flat. It may have a smooth or uneven shape. The width M3 of the third wall portion 13W is The width of one wall section 11W is smaller than the width M1, for example, 50% to 90% of the width M1. The third wall portion 13W, which has a pair of sides, has one side of the third wall portion 13 connected to the second wall portion 12W. They face each other, with the other side of the third wall portion 13 facing the first wall portion 11W. X direction of the third region 13 When the second wall portion 12W is positioned there, the wall portion located on the X-direction side of the third region 13 is the third wall portion 13W, and the wall located on the Y-direction side of the third region 13 is the first wall 11W. This is preferable. This allows light from the light source located in the third region 13 to be directed to the outer edge of the reflective member. This makes it easier to guide the plot to the edge.

[0021] (4th area 14) The reflective member 10 preferably further comprises a fourth region 14. The fourth region 14 is the first It is located outside of region 11. The fourth region 14 is located outside of the third region 13. This is also possible. The fourth region 14 is located outside the first region 11 and adjacent to the first region 11. It may be done, or it may be located outside the third region 13, adjacent to the third region 13. It may be present. Also, the fourth region 14 may be adjacent to the second region 12. The fourth region 14 consists of a bottom fourth portion 14B and at least a second wall portion 12W connected thereto. This is the region that includes the fourth region 14, in addition to the fourth part 14B and the second wall portion 12W. This may be a region including the first wall portion 11W, or the first wall portion 11W and the third wall portion 13W It may also include the region. In this case, both the first wall portion 11W and the third wall portion 13W are the fourth It is connected to section 14B.

[0022] For example, as shown in Figure 1A, if the fourth part 14B is a rectangle in plan view, The fourth part 14B only needs to have at least one side connected to the second wall 12W. 4B is surrounded by a first wall section 11W located on three sides and a second wall section 12W located on one side. Alternatively, a first wall section 11W may be placed on one side, and a second wall section 12W may be placed on two sides. It may also be surrounded by a third wall section 13W located on one side. If the fourth part 14B is a regular hexagon, then the fourth part 14B has at least one side that is a second hexagon. It is sufficient for it to be connected to the wall section 12W, and it is also acceptable for two sides to be connected to the second wall section 12W. Part 4 Section 14B consists of a first wall section 11W arranged on three sides, a second wall section 12W arranged on one side, and two sides It may also be surrounded by a third wall portion 13W positioned at the same location. Furthermore, the fourth portion 14B has two sides A first wall section 11W is placed on one side, a second wall section 12W is placed on two sides, and a third wall section is placed on two sides. It may be surrounded by part 13W. The fourth part 14B is the first wall part 11 arranged on three sides Surrounded by W, a second wall section 12W located on two sides, and a third wall section 13W located on one side. It may also be done. The fourth part 14B has a first wall portion 11W arranged on five sides and a second wall portion arranged on one side. It may be surrounded by two wall sections 12W. The fourth section 14B is the first wall section arranged on all four sides. It may be surrounded by 11W and second wall sections 12W positioned on two sides. The partitioned area of ​​the fourth region 14 is separated by the second wall 12B in Figure 1F, with the fourth part 14B in between. This refers to the region between the upper end of [the first part of the wall] and the upper end of the third wall portion 13W.

[0023] The fourth region 14 may contain one fourth part 14B, or multiple fourth parts 1 4B may be placed. Also, the fourth region 14 is the first region 11 or the third region 13. They may be placed outside each region, or outside a part of the first region 11 or the third region 13. It's fine if it's placed there. Part 4, 14B, can have the same shape and size as Part 1, 11B. When the fourth part 14B is positioned, all of those regions have the same planar shape and the same size. It is preferable that this is the case. Furthermore, in the fourth region 14, the fourth portion 14B forms the same plane. It is preferable that the fourth part 14B is arranged in such a way that it is For example, it is preferable that it be positioned at the same height as the upper surface of the first wall portion 11W. Furthermore, the fourth part 14B is coplanar with the first part 11B and / or the third part 13B. Therefore, it is preferable that it be positioned at the same height as the upper end of the first wall portion 11W. The first wall section 11W, the second wall section 12W, and the third wall section 13W are as described above.

[0024] (5th area 15) The reflective member 10 may further include a fifth region 15. The fifth region 15 is a part of the first region It is located outside of 11. The fifth region 15 is partially or completely adjacent to the first region 11. They may be positioned together, or they may be positioned partially or entirely apart from the first region 11. In particular, the fifth region 15 is preferably positioned adjacent to the outer edge of the reflective member 10. stomach. The fifth region 15 is located outside the first region 11, and consists of the second part 12B, the first region 11, and the second It can be placed adjacent to one or more of region 12, the third region 13, and the fourth region 14. For example, the fifth region 15 is the region that includes the base fifth part 15B. It may have the same shape and size as the first part 11B, or it may be different from the first part 11B. They may have different shapes and sizes. For example, the fifth region 15 is 6 of the first part 11B. Areas in plan view from 0% to 120% are given. The fifth region 15 is the outer shape of the reflective member. The size and shape can be set appropriately accordingly. In other words, multiple units can be placed in the fifth region 15. When part 5, 15B is placed, the shape, size, etc. of the parts 5 will differ in some and all of them. It may be so. Part 5 15B shall form the same plane in region 5 15. It is preferable that it be arranged in such a way. From another viewpoint, the fifth part 15B is entirely, for example It is preferable that it be positioned at the same height as the upper end of the first wall portion 11W. The fifth part 15B is relative to the upper end of the first wall portion 11W, the first part 11B, the third part 13B or It is preferable that the fourth part 14B is positioned at the same height.

[0025] The fifth region 15 is connected to the fourth wall portion 14W located on the outer edge of the reflective member. Region 15 is a region having a first wall portion 11W that is connected to the fifth portion 15B (15m in Figure 2C) It is possible. The fifth region 15 consists of the first wall portion 11W and the second wall portion connected to the fifth portion 15B. The region may have part 12W. The fifth region 15 is connected to the fifth part 15B, Region having wall portion 11W, second wall portion 12W, and third wall portion 13W (15r in Figures 1C and 2C) ) may also be the case. The fifth region 15 is the first wall portion 11W and the third wall portion connected to the fifth portion 15B The region may have a portion 13W. The fifth region 15 is a second wall connected to the fifth portion 15B. It may also be a region having section 12W and a third wall section 13W (15t in Figure 2C).

[0026] For example, as shown in Figure 1A, the fifth part 15B is a rectangle or a shape similar thereto. In this case, the fifth region may have a fifth portion 15B and three first wall portions 11W. Furthermore, the fifth region 15 consists of a fifth part 15B, and two first wall portions 11W and one second wall portion 1 It may also have 2W. The fifth region 15 has a fifth portion 15B and a first wall portion 11W on one side. It may also have a second wall portion 12W on one side and a third wall portion 13W on one side. Fifth region 15 It has a fifth part 15B, and first wall portions 11W on two sides and a third wall portion 13W on one side. This is also acceptable. Furthermore, as shown in Figure 2A, etc., the fifth part 15B may be a regular hexagon or a shape approximating it. In this case, the fifth region has a fifth portion 15B and four first wall portions 11W. Good. The fifth region 15 consists of the fifth part 15B, the first wall portion 11W on three sides, and the second wall portion 1 on one side. It may have 2W and a third wall portion on one side. The fifth region 15 has a fifth portion 15B and 2 Even if it has a first wall portion 11W on one side, a second wall portion 12W on one side, and a third wall portion 13W on one side Good. The fifth region 15 consists of the fifth part 15B, the second wall portion 12W on two sides, and the third wall portion 1 on three sides. It may also have 3W. The fifth region 15 has a fifth portion 15B and two first wall portions 11W on its sides. It may also have a third wall portion 13W on two sides and a second wall portion 12W on one side. Fifth region 1 The partition area 5 is located opposite the upper end of the fourth wall portion 14W and the fourth end portion 14W, with the fifth portion 15B in between. This refers to the region between the first wall portion 11W and the adjacent portion.

[0027] (Fourth wall section 14W) As shown in Figures 1E-1G and 2D-2G, the reflective member further comprises a fourth wall portion 14W. It is preferable that the fourth wall portion 14W is partially interrupted at the outer edge of the reflective member 40 and has air They can be placed in between other elements, or they can be positioned around the entire perimeter. The fourth wall portion 14W is, for example, the second portion 12B which is positioned adjacent to the outer edge of the reflective member 10. Alternatively, it is preferable that it is arranged in conjunction with the fifth portion 15B. The fourth wall portion 14W is part of the second portion When arranged in conjunction with section 12B, the fourth wall section 14W is connected to the fifth section 15B. Compared to when they are arranged in a certain way, the height of the wall itself is lower. However, in any case Even in this case, the height of the upper end of the fourth wall 14W is the same as that of the first wall 11W. It is preferable that the height of the first wall portion 11W is the same as the height from the first portion. The wall portion 14W extends upward from the outer edge of the second portion 12B or the fifth portion 15B (i.e., in the X direction and It is positioned to rise in the Z direction, which is perpendicular to the Y direction. 4th wall section 14 W may be perpendicular to the second part 12B or the fifth part 15B, or it may be tilted It may be angled. The inclination angle of the fourth wall section 14W is the same as that of the first wall section 11W and the third wall section 13W. For example, a range of 45 to 80 degrees is given.

[0028] As described above, in a plan view, the fourth wall portion 14W of the reflective member 10 is the outer edge of the reflective member. The reflective member 10 is arranged in the first wall portion 11W, the second wall portion 12W, and the third wall portion 13W Preferably, these first wall portions 11 W, the second wall 12W, and the third wall 13W are regularly extended in a vertical, horizontal, row-and-column, or matrix-like manner. It is preferable that they be arranged in a frame-like manner, connected together. The upper end is preferably arranged in a triangular, square, or hexagonal frame shape when viewed from above. In other words, the first wall section 11W, the second wall section 12W, and the third wall section 13W are as described later. As such, depending on the number and position of the light sources 9 arranged on the substrate 8, in a plan view, for example, Within the first region 11, four first partition regions, etc. are adjacent to each other, and the upper ends of the four first wall sections 11W, etc. are at one location. It can be connected by (see Figure 1A). Also, the first wall section 11W, the second wall section 12 As shown in Figures 2A and 3, etc., W and the third wall portion 13W are adjacent to three first regions 11 etc. The upper ends of the three first wall sections 11W may be connected at one point. The second wall section 12W and the third wall section 13W are adjacent to six first regions 11 etc. The top ends of 11W and other types may be connected at one point. In other words, these are in a planar tiling form. It is preferable that they be arranged in such a way. For example, the first wall portion 11W, the second wall portion 12W and the third wall portion The pitch between the upper ends of each 13W (P in Figure 1F) depends on the size of the light source used and the intended light source device. The size can be adjusted as appropriate. The first wall section 11W, the second wall section 12W and The pitch between the upper ends of the three wall sections 13W can be, for example, 1 mm to 50 mm, and 5 mm to 20 mm is preferred, and 6 mm to 15 mm is more preferred. In particular, these first wall portions 11W, The pitch between any two walls, 12W and 13W, should all be the same. preferable.

[0029] The second wall section 12W and the third wall section 13W, like the first wall section 11W, have their upper ends flat. It may also be a ridge formed by at least two wall sections surrounding an adjacent area. It may also be in the shape of . In other words, as shown in Figures 1D-1G and 2D-2G, the top The longitudinal sections of at least two wall sections that make up the structure are triangular (the corners may be rounded). A triangle or two is preferable, and an isosceles triangle is more preferable. It is even more preferable that the isosceles triangle be an acute triangle or an acute isosceles triangle. Furthermore, the space and area occupied by the reflective member 10 are reduced, and the height of the reflective member 10 is reduced. This makes it possible to make the light source device thinner. The fourth wall section 14W also has a vertical cross-section that is an acute angle three Materials that form the sides of a rectangle are preferred. Furthermore, the reflective member 10 comprises at least a first portion 11B, a third portion 13B, and a fourth portion 1 It is preferable that 4B, together with the surrounding wall portions, be arranged in a planar tiling manner.

[0030] The reflective member 10 consists of a first part 11B, a third part 13B, a fourth part 14B, and a fifth part 15 In B, near the center (or center of gravity) of the bottom of each part, for example, approximately in the center, there is a penetration for mounting a light source. It is preferable that a hole 16 is formed. The shape and size of the through hole 16 depend on the light source used, etc. It can be set according to the shape and size, and the shape and size in which the light source 9 is exposed. It is preferable that the inner edge of the through-hole 16 is positioned only in the vicinity of the light source 9. This allows the light from the light source to be divided into the first part 11B, the third part 13B, and the fourth part 14B. Furthermore, reflection can also be performed in the fifth section 15B, improving the efficiency of light extraction. Yes, it is possible. For example, the through hole 16 may be a polygon such as a circle, ellipse, triangle, or quadrilateral, or an approximate form thereof. The through hole 16 can have a planar shape, and its maximum length in plan view is 0.5 mm It can be set to 25mm.

[0031] In the example shown in Figures 1E to 1G, cavities exist within each wall portion of the reflective member 10. However, The cavity may contain the same material as the wall or a different material. Alternatively, a reflective section. Each wall section of material 10 may be solid and not have any voids. Bottom of the reflective member 10 (first part 11B, third part 13B, fourth part 14B and fifth part The thickness of part 15B) can be, for example, 100 μm to 300 μm. Reflective member The first to fourth walls may have the same thickness as the bottom, or they may have different thicknesses. The reflective member 10 is a reflective material consisting of particles such as titanium oxide, aluminum oxide, and silicon oxide. It may be molded using a resin containing the reflective material, or it may be molded using a resin that does not contain the reflective material. Furthermore, a reflective material or reflective film may be provided on the surface. The reflective member 10 may be a rigid member or a flexible member. The member may also have rigid and flexible parts. 0 may be a flat member that constitutes a plane, or it may be a member that constitutes a curved surface, etc. These can also be components that combine these elements.

[0032] The reflective member 10 can be formed by molding using a mold, molding by stereolithography, or other methods. Yes, it is possible. Molding methods using molds include injection molding, extrusion molding, compression molding, vacuum molding, and plastination. Molding methods such as resin molding can be applied. For example, a reflective sheet formed from PET, etc. Using a tool, vacuum forming or press forming is performed, then the material is cut into a predetermined shape, and through holes are formed. This makes it possible to form a reflective member 10 in which the wall portion, bottom portion, etc. are integrally formed.

[0033] (Light source device) As shown in Figures 6 and 7, the light source device of one embodiment of the present invention comprises a substrate 8, a light source 9, It comprises the reflective member 10 described above. (Reflective member 10) In the light source device, the reflective member 10 is preferably placed on the substrate 8, and the reflective member 1 It is preferable that the bottom surface of the base of 0 and the top surface of the substrate 8 are fixed together. In particular, the emission from the light source 9 To prevent light from entering between the substrate 8 and the reflective member 10, the area around the through hole 16 is made of a light-reflective material. It is preferable to fix it using an adhesive member. For example, a ring along the outer edge of the through hole 16. It is more preferable to arrange the light-reflective adhesive members in a specific shape. The adhesive members are double-sided tape. It may also be a hot-melt type adhesive sheet, or a thermosetting resin and a thermoplastic resin. These adhesives may be resin-based adhesives such as the following. These adhesives are preferably highly flame-retardant. It seems so. Furthermore, screws or the like may be used to fix the reflective member 10 onto the substrate 8. By utilizing the reflective material described above, the light source device can be a polygon such as a square or rectangle. Regardless of the shape of the instrument or other irregular shape, the light source is regularly positioned near its outer edge. It is not possible to position the light precisely, and dark areas appear when observing from the light extraction side. It can be avoided.

[0034] (Light source 9) As shown in Figure 4, multiple light sources 9 are arranged on the substrate 8. Specifically, the light sources 9 These are on the substrate 8, and each through hole 1 at the bottom of the reflective member 10 placed on the substrate 8 It is located inside 6. However, in the fifth region 15, depending on the shape of the reflective member In the fifth section 15B, through holes 16 having the same shape and size as those in the first section 11B, etc. Although it may not be possible, even if a through hole is formed, within the fifth part 15B There may be a bottom area where no light source is placed. Light source 9 is a component that emits light, for example, a light-emitting element itself that emits light, a light-emitting element A surface-mount type light-emitting device in which the light-emitting element is sealed with a light-transmitting resin or the like. It includes (also called LEDs), etc. Multiple light sources 9 are placed on the substrate 8, each of the reflective members It is preferable that the elements are arranged within a partitioned area and placed in a regular, parallel manner, such as in rows, columns, or matrices. This is desirable. This makes it possible to suppress brightness unevenness within the surface. In other words, multiple The light sources 9 are placed in each of the through-holes 16, as shown in Figure 1A, and are arranged in a regular, parallel manner in a matrix. Preferably, as shown in Figures 2A and 23, they are arranged regularly in parallel in the row direction and in the column direction. To do this, shift half the amount (length) of light source 9 in the row direction so that it is positioned between light sources 9 in adjacent rows. Furthermore, they may be arranged in a regular, parallel manner. For example, as shown in Figure 4, the light source 9 is a light-emitting element 7 covered with a sealing member 5. For example, the light source 9 may use one light-emitting element 7, or multiple light-emitting elements It is also acceptable to use a single light source with the optical element 7.

[0035] The light source 9 emits light with minimal brightness unevenness in each region surrounded by the wall portion of the reflective member 10, which will be described later. To achieve this, a wide beam angle is preferable. In particular, each of the light sources 9 is as shown in Figure 5. It is preferable to have a bat-wing light distribution characteristic. This is because directly above the light-emitting element 7 The amount of light emitted in each direction is suppressed, the light distribution of each light source is broadened, and the broadened light is directed to the reflector 10. By irradiating the area, it is possible to suppress brightness unevenness in each region enclosed by the wall. ru. Here, the batwing light distribution characteristic refers to the absolute value of the light distribution angle relative to 0 degrees, with the optical axis L being 0 degrees. It is defined as having a luminescence intensity distribution that is stronger than 0 degrees at large angles. The optical axis L, as shown in Figure 4, passes through the center of the light source 9 and lies on the plane of the substrate 8, which will be described later. It is defined by a line that intersects the line perpendicularly.

[0036] In particular, as a light source 9 having batwing light distribution characteristics, for example, as shown in Figure 4, One example is a device using a light-emitting element 7 having a light-reflective film 6 on its upper surface. Light directed upward is reflected by the light-reflecting film 6, suppressing the amount of light directly above the light-emitting element 7, and the bat Ing light distribution characteristics can be obtained. Note that a separate lens is required to achieve batwing light distribution. They can be combined in various ways. The light-reflecting film 6 formed on the upper surface of the light-emitting element 7 is a metal film such as silver or copper, or a dielectric multilayer film (DB The light-reflecting film 6 may be any of the following: R film, white resin, or a combination thereof. It is preferable that the emission wavelength of sub-element 7 has an angle dependence of reflectance with respect to the incident angle. Specifically, the reflectivity of the light-reflecting film 6 is set to be lower for oblique incidence than for perpendicular incidence. It is preferable to set it. This makes the change in brightness directly above the light-emitting element gradual, This can suppress extreme darkness, such as a dark spot directly above the light-emitting element. For example, the light source 9 has a height of the light-emitting element 7 directly mounted on the substrate, ranging from 100 μm to 500 μm. Examples include those with a thickness of m. Examples of light-reflecting film 6 with a thickness of 0.1 μm to 3.0 μm include those with a thickness of 0.1 μm to 3.0 μm. Even including the sealing member 5 described later, the thickness of the light source 9 should be approximately 0.5 mm to 2.0 mm. It is possible. Multiple light sources 9 can be driven independently of each other, and dimming control for each light source (for example, low Caldimming or HDR (High Dynamic Range) will be possible. It is preferable that the sea urchin is placed on the substrate 8, which will be described later.

[0037] (light-emitting element 7) As the light-emitting element 7, known elements can be used. For example, as the light-emitting element It is preferable to use a photodiode. The light-emitting element can be selected to have any wavelength. For example, for blue and green light-emitting elements, nitride-based semiconductors can be used. This can be done. In addition, GaAlAs, AlInGaP, etc. can be used as the red light-emitting element. It is possible to use semiconductor light-emitting elements made of other materials. The composition, emission color, size, and number of light-emitting elements can be appropriately selected according to the purpose. . As shown in Figure 4, the light-emitting element 7 is flip-chip mounted on the substrate 8 via a bonding member 3. Examples include those that have been mounted face-up. The light-emitting element 7 may also be face-up mounted. Joint Material 3 is a component for fixing the light-emitting element 7 to a substrate or conductive wiring, and is made of an insulating resin or Examples include conductive materials. In the case of flip-chip mounting as shown in Figure 4, conductive materials are Components are used. Specifically, Au-containing alloys, Ag-containing alloys, Pd-containing alloys, In-containing alloys Gold, Pb-Pd containing alloy, Au-Ga containing alloy, Au-Sn containing alloy, Sn containing alloy, S n-Cu containing alloy, Sn-Cu-Ag containing alloy, Au-Ge containing alloy, Au-Si containing alloy Examples include gold, aluminum-containing alloys, copper-in-containing alloys, and mixtures of metal and flux.

[0038] (Sealing member 5) The sealing member 5 protects the light-emitting element from the external environment and also blocks the light emitted from the light-emitting element. The light-emitting element is covered for purposes such as optical control. The sealing member 5 is formed of a light-transmitting material. The materials used include epoxy resin, silicone resin, or a mixture thereof. Light-transmitting resins such as oils, glass, etc. can be used. Among these, light resistance and molding properties are important. For ease of use, it is preferable to use silicone resin. The sealing member 5 contains a light-emitting element. A phosphor or other wavelength converter that absorbs light from an external source and emits light of a different wavelength than the light output from the light-emitting element. Replacement material, diffuser to diffuse light from the light-emitting element, and coloring corresponding to the light-emitting color of the light-emitting element. It may contain agents, etc. Phosphors, diffusing agents, and colorants that are known in the relevant field may be used. The sealing member 5 may be in direct contact with the substrate 8. The sealing member 5 is adjusted to a viscosity that allows for printing, dispensing with a dispenser, etc., and is subjected to heat treatment, light, etc. It can be cured by irradiation. The shape of the sealing member 5 is, for example, a roughly hemispherical shape. , vertically elongated in cross-sectional view (a shape in which the length in the Z direction is longer than the length in the X direction in cross-sectional view) A convex shape, a flattened convex shape in cross-section (in cross-section, the length in the X direction is greater than the length in the Z direction) (It may be formed to be long in length, or to be circular or elliptical in top view.) stomach. The sealing member 5 is placed between the lower surface of the light-emitting element 7 and the upper surface of the substrate 8 as underfill 5a. It's fine if it's placed there.

[0039] (Circuit board 8) The substrate 8 is a component for arranging multiple light sources 9, and as shown in Figure 4, its upper surface It has wiring layers 4A and 4B for supplying power to light sources 9 such as light-emitting elements 7. In 4B, the covering member 2 covers a portion of the area where there is no electrical connection with the light-emitting element. It is preferable that they be present. The material of the substrate 8 is such that at least one pair of wiring layers 4A and 4B can be insulated and separated. This would be sufficient. Examples include ceramics, resins, and composite materials. As for resins, Nol resin, epoxy resin, polyimide resin, BT resin, polyphthalamide (PPA) Examples include polyethylene terephthalate (PET). Composite materials include those mentioned above. A resin mixed with inorganic fillers such as glass fibers, SiO2, TiO2, and Al2O3. Glass fiber reinforced resin (glass epoxy resin), metal substrates with an insulating layer formed on a metal component, etc. These are some examples. The substrate thickness can be selected as appropriate, and it is possible to manufacture it using a roll-to-roll method. It may be either a flexible substrate or a rigid substrate. The rigid substrate is a thin, bendable substrate. A rigid substrate is also acceptable. The wiring layers 4A and 4B may be formed from any material as long as they are conductive. It can be the same material commonly used as a wiring layer on circuit boards, etc., on the surface of the conductor wiring. A plating film, a light-reflective film, or the like may be formed on it. The covering member 2 is preferably formed of an insulating material. The material is a substrate material. Examples of materials similar to those exemplified are available. The covering material is made of the aforementioned resin with a white color By using materials containing fillers, etc., light leakage or absorption can be prevented, This can improve the light extraction efficiency of the device.

[0040] (Other components) As shown in Figures 6 and 7, the light source device of this embodiment further includes a diffuser plate 17 and / or an expander Diffused sheet 22, wavelength conversion sheet 23, prism sheet 24, polarizing sheet 25, outer edge of substrate An outer substrate 27 having a reflective wall surrounding it, and a covering having a reflective wall surrounding the outer periphery of the reflective member. It is preferable that the substrate 26 etc. are provided. Furthermore, these components may optionally include an adhesive layer and / Alternatively, they can be laminated via reflective layers 28, 29, 31, etc. Furthermore, a liquid crystal panel or the like is placed on top of it, and a surface light source is used for direct-lit backlighting. It can be used as an optical light source device. The stacking order of these optical components can be set arbitrarily. It is possible.

[0041] (Diffuser plate 17 and / or diffusion sheet 22) The diffuser plate 17 and / or diffuser sheet 22 (hereinafter simply referred to as diffuser plate 17) are incident on It is a component that diffuses and transmits light, and it is preferable to place one above multiple light sources 9. The diffuser plate 17 is positioned so as to be in substantially contact with the upper ends of the first wall portion 11W and the fourth wall portion 14W. It is preferable that the diffuser plate 17 has irregularities arranged on its surface, or it is a flat plate. It may also be a shaped member. The diffuser plate 17 is arranged substantially parallel to the substrate 8. Preferred. The diffuser plate 17 may be made of, for example, polycarbonate resin, polyethylene resin, or acrylic. It can be constructed from materials that have low light absorption for visible light, such as resins and polyethylene resins. To diffuse the incident light, the diffuser plate 17 may have irregularities on its surface. Materials with different refractive indices may be dispersed in the diffuser plate 17. The irregularities can be, for example, 0.01 mm to 0.1 mm in size. Materials with different refractive indices can be selected from, for example, polycarbonate resin, acrylic resin, etc. They can be selected and used.

[0042] The thickness of the diffuser plate 17 and the degree of light diffusion can be set as appropriate, and a light diffusion sheet, diffuser Materials that are commercially available as diffuser films, etc., can be used. For example, a diffuser plate. The thickness of 17 can be between 1mm and 2mm. When the reflective members 10 are arranged at a pitch P between each wall portion, the distance between the diffuser plate and the light source is, that is, It is preferable that the diffuser plate 17 is positioned such that its height OD is, for example, 0.3P or less. It is preferable that the height OD is 0.25P or less. As shown in Figure 1H, the outermost surface of the substrate 8, that is, the substrate 8, has a covering member 2 on its surface, and wiring If layers 4A, 4B, etc. are present, the distance from their outermost surface to the bottom surface of the diffuser plate 17 is (OD1 ) means. From another perspective, the diffuser plate 17 is at a distance from the upper surface of the bottom surface 10c of the reflecting member 10. The distance is preferably 1.5 mm to 5 mm, and more preferably 2 mm to 3 mm. stomach.

[0043] (Wavelength conversion sheet 23) The wavelength conversion sheet 23 may be placed on either the upper or lower surface of the diffuser plate 17, as shown in Figure 6. As shown in 7, the diffuser plate 17 and / or the diffuser sheet 22 may be placed on the upper surface. The wavelength conversion sheet 23 absorbs a portion of the light emitted from the light source 9, and the wavelength of the light emitted from the light source 9 is reduced. It emits light of a different wavelength. For example, the wavelength conversion sheet 23 emits light of a different wavelength from the blue light from the light source 9. This light source device absorbs light and emits yellow, green, and / or red light, and emits white light. This is possible. The wavelength conversion sheet 23 is spaced apart from the light-emitting element of the light source 9, so the light-emitting element Use of phosphors or the like that have poor resistance to heat or light intensity, which are difficult to use in the vicinity of children. This makes it possible to improve the performance of the light source device as a backlight. The wavelength conversion sheet 23 has a sheet shape or a layer shape, and the phosphor described above Includes, etc.

[0044] (Prism Sheet 24) The prism sheet 24 has a shape on its surface in which multiple prisms extending in a predetermined direction are arranged. It has a shape. The prism sheet 24 has, for example, a plane of the sheet in the X direction and a Y direction perpendicular to the X direction. Viewed in two dimensions with respect to direction, it has multiple prisms extending in the Y direction, and multiple prisms extending in the X direction. Multiple prisms can be stacked and used. Prism sheets can be made from various materials. The light incident from one direction is refracted toward the display panel facing the light source device. Yes, it is possible. This allows the light emitted from the light-emitting surface of the light source device to be directed primarily in a direction perpendicular to the upper surface. By emitting light, the brightness when the light source is viewed from the front can be increased.

[0045] (Polarizing sheet 25) The polarizing sheet 25 is, for example, placed on the backlight side of a display panel, such as a liquid crystal display panel. Light with a polarization direction matching the polarization direction of the polarizing plate placed on it is selectively transmitted, and in that polarization direction The polarization in the perpendicular direction can be reflected towards the prism sheet 24. Polarizing sheet 25, The prism sheet 24 and other components used are commercially available optical components for backlights. It is possible.

[0046] (Coating substrate 26 and / or outer substrate 27, adhesive layer and / or reflective layer 28, 29, 31) ) The coated substrate 26 has a reflective wall surrounding the outer periphery of the reflective member 10, and the reflective member 10 and the above A covering that presses down on and fixes or supports the upper outer edge of an optical component such as a diffuser plate 17. It is a material. Furthermore, the outer substrate 27 has a reflective wall surrounding the outer periphery of the substrate 8, and is protected from the back side of the substrate 8. It is a covering component. These are emitted from the light-emitting device by contacting or interlocking reflective walls with each other. This prevents light from leaking outside these reflective walls, i.e., outside the light source device, and the light-emitting surface This component is designed to improve brightness in [the context of the device / device]. These components are, for example, reflective materials, as long as they reflect the light emitted from the light-emitting device. It can be formed from various materials such as resins, metals, and ceramics containing [the specified element]. Furthermore, the adhesive layer and the reflective layer bond the upper and lower members together, and the direct light emitted from the light-emitting device Any material capable of reflecting light and indirect light will suffice. For example, double-sided tape, hot melt type Various types of adhesives can be used, including adhesive sheets, thermosetting resins, and resin-based adhesives such as thermoplastic resins.

[0047] Embodiment 1 As shown in Figures 1A to 1I, the reflective member 10 of this embodiment has an outer shape that is linear and curved. It approximates a trapezoid with sides of a certain shape, and the regions corresponding to its upper and lower corners have curvatures of different degrees. It has an irregular shape. The reflective member has, for example, a maximum width of 700 mm in the X direction and a maximum width in the Y direction. The width is 125 mm. The reflective member 10 has multiple bottoms that are regularly arranged vertically and horizontally, and each of these bottoms is It comprises a wall section that surrounds each bottom and is connected to it, and a wall section that surrounds the outer edge of the reflective member 10. The bottom is For example, a square measuring 6.6mm x 6.6mm, where the upper edges of the wall portion are flat. In a surface view, they are arranged in a square frame shape. The reflective member 10 has a first region 11 on the inside, and a third region 13 on the outside of the first region 11. It has a fourth region 14, a fifth region 15, and a second region 12. The third region 13 is adjacent to the first region 11. They are adjacent. The fourth region 14 is adjacent to the first region 11, the third region 13, and the fifth region 15. Furthermore, the fourth region 14 is 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 reflective member.

[0048] The first region 11 has a first portion 11B and a first wall portion 11W. The second region 12 has a second part 12B. The second part 12B is larger than the first part 11B. It is positioned at a high location. The second part 12B is located on the side closer to the first region 11, and the first wall It is connected to a second wall section 12W, which is lower in height than section 11W. The third region 13 has a third portion 13B, a first wall portion 11W, and a third wall portion 13W. The fourth region 14 consists of a fourth part 14B and a first wall portion 11W and a second wall portion 12W, or the first It has a wall section 11W, a second wall section 12W, and a third wall section 13W. The fifth region 15 consists of the fifth part 15B and the first wall portion 11W, or the first wall portion 11W and the second Wall section, or first wall section 11W and second wall section and third wall section, or first wall section 11W and third It has a wall portion. The fifth portion 15B is connected to the fourth wall portion that surrounds the outer edge of the reflective member 10. Yes, they are.

[0049] Part 11B, Part 313B, and Part 414B are of the same size and shape, and They are arranged at the same height. In other words, the first part 11B, the third part 13B, and the fourth part 14B are , are arranged at a height that forms the same plane. The fifth part 15B is the outer shape of the reflective member. Depending on the shape, the shape and size of parts 15B differ in some and all. However, Part 5, 15B, may exist in the same size and shape as Part 1, 11B, etc. stomach. Part 2, section 12B has a smaller area in plan view than Part 1, section 11B. Depending on the irregular external shape of the reflective member, the shape, size, etc. of the second parts of B may differ in some and all. They are different. The second part 12B is, for example, located 1 mm above the first part 11B. do. The first wall section 11W is the same height as the fourth wall section 14W. That is, the first wall section 11W and The upper end of the fourth wall portion 14W is in the same position, for example, 2 mm above the first portion 11B. It is located in [location]. The third wall section 13W is shorter in height than the first wall section 11W. In other words, the upper end of the third wall section 13W It is located 1 mm lower than the upper end of the first wall section, and is 1 mm higher than the first section 11B. The upper end of the third wall section 13W is positioned at the same height as the second section. The second wall section 12W is the same height as the third wall section 13W. That is, the second wall section 12W and The upper end of wall section 13W is in the same position. The fourth wall section 14W is connected to the second section 12B and the fifth section 15B.

[0050] The first wall section 11W and the third wall section 13W have an acute triangular cross-sectional shape in the XZ plane, as shown in Figure As shown in 1H and 1I, the angle α1 at the top of the first wall 11W and the angle α1 at the top of the third wall 13W The angles α3 of the section are 40 degrees, and γ1 and γ3 are 65 degrees each. First wall section 11W The height of the third wall section 13W (OD1 in Figure 1H) is 2 mm, and the height of the third wall section 13W (OD1 in Figure 1I) is 2 mm. 3) is 1 mm. The reflective member 10 is made by press-molding a resin sheet containing titanium oxide onto PET, and a predetermined By cutting into the desired shape and then forming through holes, the walls, bottom, etc., are formed integrally. It is a component. The thickness of the reflective component is, for example, 0.2 mm. The through hole is in the center of each bottom. They are arranged in a circular shape, for example, with a diameter of 5.5 mm.

[0051] By using reflective materials of this shape, they can be used in display devices such as in-vehicle instruments. In that case, depending on the irregular planar shape, there will be areas where the light source is not placed on the outer edge of the reflective member. Even if a region exists, the light from the light source that has traveled towards the second region 12 side by the second part 12B is It can reflect efficiently. Furthermore, the partition region located outside the first region 11 (the Light from light sources located in the third region 13 or the fourth region 14) is directed to a height greater than the first wall portion 11W. This allows it to pass above the lower third wall portion 13W and proceed towards the second region 12. This makes it possible to suppress brightness unevenness within the light-emitting surface. Also, the inside of the reflective member 10 Light from a light source located in the first region 11 is blocked by the first wall 11W, adjacent to It can be reflected upwards without traveling into the designated area.

[0052] Embodiment 2 As shown in Figures 2A to 2G, the reflective member 20 of this embodiment has an outer shape with straight edges. It approximates a trapezoid, and the regions corresponding to its upper and lower corners have different curvatures and rounded shapes. The reflective member, for example, has a maximum width of 700 mm in the X direction and a maximum width of 125 mm in the Y direction. It is mm. The reflective member 20 has multiple bottoms and wall sections that surround each of these bottoms and are connected to each bottom. It comprises a base and a wall portion surrounding the outer edge of the reflective member 10. The base is a regular hexagon, and the wall portion is Their upper ends are arranged in a regular hexagonal frame shape in a plan view. The bottom is in the row direction. They are arranged in parallel, and in the column direction, they are positioned between the bottoms of adjacent rows, with a length equal to half the bottom. They are shifted horizontally and arranged in a regular, parallel fashion. The reflective member 20 has a first region 11 on the inside, and outside the first region 11, a third region 13, It has four regions 14, five regions 15, and two regions 12. The third region 13 is adjacent to the first region 11. However, it is also adjacent to the 4th region 14 and the 5th region 15. The 4th region 14 is adjacent to the 1st region 11, It is adjacent to the second region 12, the third region 13, and the fifth region 15. The fifth region 15 is adjacent to the first region 1 1. Adjacent to the second region 12, the third region 13, and the fourth region 14. Second region 12 and the fifth region Area 15 is adjacent to the outer edge of the reflective member 20. Except as described above, it has substantially the same configuration as the reflective member 10 of Embodiment 1.

[0053] Embodiment 3 As shown in Figure 3, the reflective member 30 of this embodiment has an outer shape with straight and curved sides. It approximates a trapezoid, but the regions corresponding to its upper and lower corners have different curvatures. It is in that state. The reflective member 30 has multiple bottoms and wall sections that surround each of these bottoms and are connected to each bottom. It comprises a base and a wall portion surrounding the outer edge of the reflective member 10. The base is a regular hexagon, and the wall portion is Their upper ends are arranged in a regular hexagonal frame shape in a plan view. The bottom is in the row direction. They are arranged in parallel, and in the column direction, they are positioned between the bottoms of adjacent rows, with a length equal to half the bottom. They are shifted in the direction of the divisions and arranged in regular parallelism. The reflective member 30 has a first region 11 on the inside, and outside the first region 11, a fourth region 14, It has five regions 15 and a second region 12. The fourth region 14 has the first region 11, the second region 12 and It is adjacent to the fifth region 15. The fifth region 15 is adjacent to the first region 11, the second region 12 and the fourth region 1 It is adjacent to 4. The second region 12 and the fifth region 15 are adjacent to the outer edge. The second region 12 is defined as having a second portion 12B that is partitioned by a wall that is the same height as the first wall. In other words, the second part 12B is located on the side closer to the first region 11, the fourth region 14, or the fifth region 15. In this configuration, the second wall section 12W1 is connected to the first wall section 11W and the fourth wall section 14W at the same height. In other words, it is close to the first region 11, the fourth region 14, or the fifth region 15 of the second part 12B. On the other side, a second wall section 12W1 is positioned adjacent to the second section 12B. Except as described above, the reflective member 10 of Embodiment 1 and the reflective member 20 of Embodiment 2 are substantially the same. They have a similar configuration. [Industrial applicability]

[0054] The present invention relates to a light source for backlights of display devices, lighting devices, automotive instruments, and other light sources. It can be used in various light source devices, such as light sources. [Explanation of Symbols]

[0055] 2 Covering member 3. Joining members 4A, 4B wiring layer 5 Sealing member 5a Underfill 6 Light reflective film 7 Light-emitting elements 8 circuit boards 9 light source 10, 20, 30 Reflective members 11 First region 11B First part 11W, 11Wa, 11Wb First wall part 12 Second region 12B Second part 12W, 12W1 Second wall part 13 Third region 13B Third part 13W, 13Wa, 13Wb Third wall part 14 Fourth region 14B Fourth part 14W Fourth wall part 15 Fifth region 15B Fifth part 16 Through-hole 17 Diffusion plate 22 Diffusion sheet 23 Wavelength conversion sheet 24 Prism sheet 25 Polarizing sheet 26 Coating substrate 27 Exterior substrate 28, 29, 31 Adhesive layer and / or reflective layer

Claims

1. A first region comprising a first part and a first wall portion surrounding and connected to the first part, wherein in a plane extending in the X direction and the Y direction perpendicular to the X direction, the first partitioned region defined by the first part and the first wall portion is arranged in a planar tiling manner, The system comprises a second region located outside the first region in the X direction in a plan view, The second region has a second portion positioned higher than the first portion. The second portion is a reflective member that is connected to a wall portion of the same height as the first wall portion in the Y direction, and has a smaller area in plan view than the first portion.

2. The reflective member according to claim 1, wherein the second portion is connected to a second wall portion that is lower in height than the first wall portion on the side closer to the first region in the X direction.

3. The reflective member according to claim 1 or 2, wherein a plurality of the second region are arranged.

4. The reflective member according to any one of claims 1 to 3, wherein the second portion is connected to a fourth wall portion disposed on the outer edge of the reflective member.

5. The reflective member according to claim 4, wherein the first wall portion is at the same height as the first portion and includes a fourth wall portion positioned on the outer edge of the reflective member.

6. The system further comprises a third region located outside the first region, The aforementioned third region is, It is the same size and shape as the first part, and the third part is, A reflective member according to any one of claims 1 to 5, having a first wall portion and a third wall portion that is lower in height than the first wall portion, which surrounds the third portion and is connected to the third portion.

7. The system further comprises a fourth region located outside the first region, The fourth region is, It is the same size and shape as the first part, and the fourth part is, A reflective member according to claim 6, which is dependent on claim 2, having the first wall portion and the second wall portion, or the first wall portion, the second wall portion and the third wall portion, surrounding the fourth portion and being connected to the fourth portion.

8. The system further comprises a fifth region located outside the first region, The aforementioned fifth region is, Part 5 and, The fifth portion is surrounded by and connected to the fifth portion, and has a first wall portion, or the first wall portion and the second wall portion, or the first wall portion, the second wall portion and the third wall portion, The reflective member according to claim 7, wherein the fifth portion is arranged on the outer edge of the reflective member and is connected to the fourth wall portion.

9. circuit board and Multiple light sources arranged on the substrate, The substrate comprises a reflective member according to any one of claims 1 to 8 disposed on the substrate, The reflective member has a plurality of through holes arranged in the first portion, Each of the aforementioned light sources is a light source device located inside the through-hole.

10. The light source device according to claim 9, wherein the light source has a batwing light distribution.

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