JP2008277189A - Linear light source device and manufacturing method thereof - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a linear light source device capable of suppressing variation in chromaticity or luminance of light from a plurality of light emitting elements and a method for manufacturing the same.
SOLUTION: When a plurality of light emitting elements 3 mounted linearly on a substrate 2 and linearly spaced from each other and irradiated with light emitted from the light emitting elements 3, the wavelength of light emitted from the light emitting elements 3 is exceeded. It includes a fluorescent material that emits light having a long wavelength, integrally covers the plurality of light emitting elements 3, and has a plurality of light emitting elements 3 in a direction perpendicular to the thickness direction of the substrate 2 and the direction in which the light emitting elements 3 are arranged. The resin body 4 having the side surface 7 extending along the side surface, the light reflector 5 provided on the side surface 7, and the resin body 4 at least at one portion of the light reflector 5 facing the light emitting element 3. And an adjustment body 6 formed of a fluorescent material.
[Selection] Figure 1

Description

  The present invention relates to a linear light source device used for illumination and a backlight for a liquid crystal display (abbreviated as LCD).

  Most of backlights used in small liquid crystal display devices used in portable telephone devices use LEDs (Light Emitting Diodes) as light sources. In the liquid crystal display device, a light guide plate is provided on the back surface of the liquid crystal display panel in order to emit light from the LED in accordance with the display surface of the liquid crystal display panel, and light is incident from an edge portion of the light guide plate. The light is reflected by a reflective structure provided on the back side of the liquid crystal and emitted from the front portion facing the liquid crystal display panel (see, for example, Patent Documents 1 to 3). A reflection sheet for reflecting light is provided on the back surface of the light guide plate, and an optical sheet for controlling light diffusion and directionality is provided on the front surface to achieve high luminance and suppress variation in luminance. Some have such a structure.

JP 2005-135860 A JP 2004-271621 A JP 2004-117594 A

  Since the LED is a point light source, the backlight configured using the LED and the light guide plate tends to have insufficient luminance between adjacent LEDs. In order to make the light from the point light source as close as possible to the linear light, an array substrate in which a plurality of LEDs are arranged on the same substrate, each light emitting element is covered with a fluorescent material, and a reflecting plate is provided between the LEDs. Is used. In such an array substrate, a linear light source that emits pseudo linear light is realized by guiding light from the light emitting element to the reflecting plate between the light emitting elements and irradiating the light reflected by the reflecting plate. . However, since a plurality of light emitting elements are arranged on the substrate and covered with a fluorescent material, if even one of the plurality of light emitting elements has different chromaticity or luminance, only that part is used. Can not be replaced, the chromaticity varies, and the entire product is treated as defective.

  Accordingly, an object of the present invention is to provide a linear light source device that can suppress variations in chromaticity or luminance of light from a plurality of light emitting elements, and a manufacturing method thereof.

The present invention provides a substrate on which a conductive line portion is formed,
A plurality of light emitting elements that are mounted on the substrate in a straight line at intervals and connected to the conductive line portion to emit blue light or ultraviolet light;
When the light emitted from the light emitting element is irradiated, it includes a fluorescent material that emits light having a wavelength longer than the wavelength of the light emitted from the light emitting element, and integrally covers the plurality of light emitting elements, and the thickness direction of the substrate; A resin body having side surfaces extending along the plurality of light emitting elements in a direction perpendicular to the direction in which the light emitting elements are arranged;
A light reflector provided on the side surface of the resin body;
At least one of the portions of the light reflector that faces the light emitting element, at least provided between the resin body and a fluorescent material, and at least a reflective material having a reflectance lower than that of the light reflector It is a linear light source device characterized by including the adjustment body formed by either.

Moreover, the present invention provides the resin body,
A first resin body containing the fluorescent material and individually covering each light emitting element;
And a second resin body that is transparent to the light emitted from the first resin body and integrally covers the plurality of first resin bodies.

  Further, the present invention is characterized in that the refractive index of the first resin body and the refractive index of the second resin body are selected to be equal or substantially equal.

  In the invention, it is preferable that the adjustment body is formed only between the light reflector and the resin body.

In the present invention, a plurality of light emitting elements that emit blue light or ultraviolet light connected to the conductive line portion are linearly mounted on the substrate on which the conductive line portion is formed.
When the light emitted from the light emitting element is irradiated, it includes a fluorescent material that emits light having a wavelength longer than the wavelength of the light emitted from the light emitting element, and is mutually in the thickness direction of the substrate and the direction in which the light emitting elements are arranged. A plurality of the light emitting elements are integrally covered with a resin body having side surfaces extending along the plurality of light emitting elements in a vertical direction,
A light reflector formed by applying a fluorescent material to a part of one surface or applying a reflective material having a reflectance lower than the reflectance of the remaining part to be removed, and the adjustment body includes a plurality of adjustment bodies. It is a method for manufacturing a linear light source device, which faces at least one of the light emitting elements and is attached to the side surface of the resin body so as to be provided at least between the resin body.

Moreover, the present invention provides the resin body,
Each light emitting element is individually covered by the first resin body containing the fluorescent material,
A plurality of first resin bodies are integrally covered with a second resin body that is transparent to light emitted from the first resin body.

  According to the present invention, when power is applied to each light emitting element through the conductive line portion formed on the substrate, each light emitting element emits blue light or ultraviolet light. The light from each light emitting element is irradiated onto the resin body, and the fluorescent material contained in the resin body emits light having a wavelength longer than the wavelength of the light emitted from the light emitting element, so blue light or ultraviolet light, and blue light or Light having a wavelength longer than that of ultraviolet light is emitted from the resin body, and as a result, light having a white color or a color close to white is emitted.

  The light reflected by the light reflector is emitted again through the resin body. When the adjustment body provided on the side surface of the resin body is irradiated with light between the light reflector and the resin body, the adjustment body can emit light or reduce the amount of reflected light. The chromaticity of the emitted light can be adjusted. In the present invention, a plurality of light emitting elements are mounted on the substrate in a straight line at intervals, and since these light emitting elements are covered with the resin body, variations in chromaticity or brightness occur in the substrate. However, although only the light emitting elements cannot be replaced individually, chromaticity or luminance can be adjusted by the adjusting body. Therefore, the production yield is improved and the production cost can be reduced.

  For example, when three light-emitting elements are mounted on a substrate, and the chromaticity of light from the central light-emitting element is represented by chromaticity coordinates, the chromaticity of light from other parts is represented by chromaticity coordinates. If the adjustment body is provided on the light reflector that faces the light emitting element in the center of the light reflector, the light from the light emitting element strikes the adjustment body, and fluorescence is emitted. This contributes to increase the chromaticity coordinate value. Depending on the chromaticity coordinate difference of light from each light emitting element, it is selected whether to adjust the amount of the fluorescent material or whether to provide the adjusting body on one or the other side of the resin body, or both. That's fine. If an adjustment body is provided for each portion of the light reflector that faces the light emitting element, the overall chromaticity coordinate value can be moved.

  Therefore, even if the desired chromaticity is slightly different for each user, the chromaticity can be adjusted after mounting the light emitting element with the same design on the substrate without changing the design of the light emitting element itself. Therefore, productivity can be improved.

  According to the present invention, since the first resin body containing the fluorescent material is disposed only around the light emitting element, most of the light reflected by the light reflector is from the first resin body. It passes through the second resin body that is transparent to the emitted light. In the case where the fluorescent material is dispersed in the entire region of the resin body, there is a possibility that the emission color due to the fluorescent material varies depending on the distance passing through the resin body, and color unevenness may occur. Since the fluorescent material is dispersed only around the, the color difference due to the distance hardly occurs, and variations in chromaticity can be further suppressed.

  According to the present invention, since the refractive index of the first resin body and the refractive index of the second resin body are selected to be equal or substantially equal, the light emission efficiency to the outside can be improved. . When there is a difference between the refractive index of the first resin body and the refractive index of the second resin body, light is likely to be refracted at the interface, and the total reflection light increases to the outside. The amount of emitted light is reduced, that is, the light emission efficiency is reduced. However, in the present invention, such a problem can be solved by the above configuration.

  Further, according to the present invention, since the adjusting body is formed only between the light reflector and the resin body, when the linear light source device is used in combination with other optical components, other optical components are used by the adjusting body. It can suppress that the optical characteristic of components changes.

  According to the invention, after mounting a plurality of light emitting elements on the substrate, each light emitting element is covered with a resin body containing a fluorescent material, and a light reflector formed with an adjustment body is attached to the side surface of the resin body. Even if chromaticity variation occurs in the substrate, the adjustment body can easily adjust the chromaticity. Therefore, the production yield is improved and the production cost can be reduced.

  Further, according to the present invention, the first resin body containing the fluorescent material is disposed only around the light emitting element, and the periphery is covered with the second resin body, so that the fluorescent material is disposed only around the light emitting element. It is possible to disperse, color difference hardly occurs, and chromaticity variation can be further suppressed.

  FIG. 1 is an exploded perspective view schematically showing a configuration of a linear light source device 1 according to an embodiment of the present invention. FIG. 2 is an exploded perspective view schematically showing a part of the configuration of the backlight device 20 including the linear light source device 1. FIG. 3 is an enlarged cross-sectional view showing a part of the backlight device 20. For example, the backlight device 20 is provided on the back surface of a liquid crystal panel in a liquid crystal display device.

  The linear light source device 1 includes a substrate 2, a plurality of light emitting elements 3, a resin body 4, a light reflector 5, and an adjustment body 6. The substrate 2 is configured to include a conductive line portion and a base portion on which the conductive line portion is formed and has electrical insulation, and is realized by, for example, a printed wiring board. The conductive line portion is made of, for example, gold (Au). The substrate 2, the light emitting element 3, and the resin body 4 are referred to as an array substrate.

  The light emitting element 3 is realized by an LED. Each light emitting element 3 is mounted on one surface in the thickness direction of the substrate 2 and is provided in a straight line with a space between each other. Each light emitting element 3 is connected to the conductive line portion, and emits blue light or ultraviolet light when power is applied through the conductive wire portion. The interval between the light emitting elements 3 adjacent to each other is determined in advance, and is selected from about 7 mm to 10 mm, for example, depending on the product. When the thickness direction of the substrate 2 is the Z direction, the arrangement direction of the light emitting elements 3 is the X direction, and the direction perpendicular to the Z direction and the X direction is the Y direction, the light emitting element 3 is provided in the center of the Y direction.

  The resin body 4 includes a first resin body 4a and a second resin body 4b. The first resin bodies 4a individually cover the light emitting elements 3, and the first resin bodies 4a adjacent in the X direction are separated from each other. The first resin body 4a is formed of a resin containing a fluorescent material. The fluorescent material is a phosphor such as YAG (yttrium, aluminum, garnet), and the resin is realized by, for example, a silicone resin. The 1st resin body 4a is provided over the both ends of the Y direction on the board | substrate 2, and the outer peripheral surface is formed so that it may become a semi-cylinder which has the axis line extended in a Y direction. In another embodiment of the present invention, the first resin body 4a may be formed in a hemispherical shape.

  The second resin body 4b is transparent to the light emitted from the first resin body 4a and integrally covers the plurality of first resin bodies. The resin forming the second resin body 4b is realized by, for example, a silicone resin. The refractive index of the second resin body 4b is selected to be equal to or approximately the same as the refractive index of the first resin body 4a. The refractive index of the first resin body 4a is n1, and the second resin body When the refractive index of 4b is n2, n1 and n2 are preferably n1 = n2.

  When there is a difference between the refractive index of the first resin body 4a and the refractive index of the second resin body 4b, light refraction tends to occur at the interface, and the total reflection light increases. Since the amount of light emitted to the outside is reduced, that is, the luminous efficiency is reduced, the refractive index of the first resin body 4a and the refractive index of the second resin body 4b are selected as described above. The emission efficiency of light to the outside can be improved.

  The resin body 4 has side surfaces 7 extending along the plurality of light emitting elements 3 at both ends in the Y direction. The resin body 4 is formed in a substantially rectangular parallelepiped shape, and the side surface 7 is formed in a plane. The side surface 7 is perpendicular to the Y direction.

  The light reflector 5 is a sheet body and is provided on the side surface 7 of the resin body 4. The reflectance of the light reflector 5 is selected to be 90% or more. As the light reflector 5, for example, a product name “Lumirror” manufactured by Toray Industries, Inc., a product name “Lef White” manufactured by Kimoto Co., Ltd., or the like is used. Further, the light reflector 5 is provided not only on the resin body 4 but also on the light guide plate 11 constituting the backlight device 20. The linear light source device 1 is arranged with the end face 8 in the Z direction of the resin body 4 facing the light incident end face 12 of the light guide plate 11.

  The light reflector 5a provided on one side 7a of the side surfaces 7 is formed over one surface in the thickness direction of the light guide plate 11 where the reflection structure is formed, that is, the entire back surface, and the resin body 4 and the light guide plate 11 are formed. It is pasted together. The light reflector 5b provided on the other side 7b of the side surfaces 7 is formed over the other surface of the light guide plate 11 in the thickness direction that emits light, that is, a part of the surface, and the resin body 4 and the light guide plate 11 are formed. It is pasted together. Each light reflector 5 also integrally covers the side surface of the substrate 2 in the Y direction.

  The adjusting body 6 is formed of a fluorescent material. The adjustment body 6 is a portion of the light reflector 5 that faces the light emitting element 3, and at least a part is formed between the resin body 4 and the light reflector 5. The portions of the light reflector 5 that face the light emitting element 3 are the light emitting element 3 and the first resin body 4a of the light reflector 5, and the first resin body 4a of the second resin body 4b. Including the part facing the adjacent part. The fluorescent material used for the adjusting body 6 is a fluorescent material such as YAG (yttrium, aluminum, garnet).

  In the linear light source device 1, when electric power is applied to each light emitting element 3 through a conductive line portion formed on the substrate 2, each light emitting element 3 emits blue light or ultraviolet light. The light from each light emitting element 3 is applied to the resin body 4, and the fluorescent material contained in the resin body 4 emits light having a wavelength longer than the wavelength of the light emitted from the light emitting element 3. In addition, light having a wavelength longer than that of blue light or ultraviolet light is emitted from the resin body 4, and as a result, light of white or a color close to white is emitted.

  The light reflected by the light reflector 5 is emitted to the outside again through the resin body 4. When light is applied to the adjusting body 6 provided on the side surface 7 of the resin body 4 between the light reflector 5 and the resin body 4, the adjusting body 6 emits light, so that the chromaticity of the emitted light is reduced. Can be adjusted. In the present invention, since the plurality of light emitting elements 3 are mounted linearly on the substrate 2 at intervals, and these light emitting elements 3 are covered with the resin body 4, variation in chromaticity within the substrate 2. Even if this occurs, only the light emitting element 3 cannot be replaced individually, but the chromaticity can be adjusted by the adjusting body 6 and variations in chromaticity can be suppressed. Therefore, the production yield is improved and the production cost can be reduced.

  For example, in the three adjacent light emitting elements 3 mounted on the substrate 2, when the chromaticity of light from the central light emitting element 3 is expressed by chromaticity coordinates, the chromaticity of the light in the other part is represented by color. When it is different from the one expressed in degree coordinates, the adjustment body 6 is provided in a portion of the light reflector 5 facing the light emitting element 3 in the center, so that the light from the light emitting element 3 hits the adjustment body, and the fluorescence emission Is performed, it contributes to the entire light emission, and the chromaticity coordinate value can be increased. The amount of the fluorescent material is adjusted according to the chromaticity coordinate difference of the light from each light emitting element 3, and the adjustment body 6 is provided on one side 7a or the other side 7b of the resin body 4 or on both sides 7a and 7b. Whether or not to provide is selected.

  If the adjustment body 6 is provided for each portion of the light reflector 5 facing the light emitting element 3 as in the present embodiment, the overall chromaticity coordinate value can be moved. Therefore, even for a desired chromaticity slightly different for each user, the chromaticity is adjusted after the light emitting element 3 having the same design is mounted on the substrate 2 without changing the design of the light emitting element 3 itself. Therefore, productivity can be improved.

  FIG. 4 is a flowchart showing a manufacturing process of the linear light source device 1. When the manufacturing process of the linear light source device 1 is started, the process proceeds from step s0 to step s1. In step s1, the light emitting element 3 is mounted on the substrate 2, and the process proceeds to step s2.

  In step s2, the first resin body 4a is formed, and the process proceeds to step s3. The first resin body 4a is formed by being applied by a dispenser or by setting the substrate in a mold and discharging the resin with pressure.

  In step s3, the second resin body 4b is formed, and the process proceeds to step s4. The second resin body 4b is formed by dispenser application or mold molding in the same manner as the first resin.

  In step s4, the products manufactured up to step s3 are distinguished, and the process proceeds to step s5. Here, the array substrate is set on the inspection light guide plate as a reference, and the characteristics are inspected by the surface luminance of the light guide plate. A light diffusing sheet, a prism sheet or the like is placed on the light emitting surface of the inspection light guide plate according to the specifications, and the surface luminance is measured. First, when the specification value is satisfied by this measurement, it is determined as a non-defective product, and when it is not satisfied, it is determined as a defective product.

  Next, among the defective products that are determined to be defective due to variations in chromaticity, the rank of the light emitting element at the location where the chromaticity differs for each product, and the defect rank according to the content such as the chromaticity difference, etc. Set and distinguish for each defect rank. For example, for the product α1, when the chromaticity of the first light emitting element from the end in the arrangement direction is different, the rank is “rank 1”, and the color of the second light emitting element from the end in the arrangement direction. When the degrees are different, “rank 2” is used. Regarding the chromaticity difference, when the difference in xy coordinates in the chromaticity coordinates is 0.05 or more and less than 0.1, “rank A” is given, and the difference is 0. In the case of 1 or more and less than 0.2, “Rank B” is used so that the final rank display includes “Rank 1A”, “Rank 1A”, “ Each product is distinguished by expressing the content as “rank 2B”.

  In step s5, for the array substrate determined to be defective in step s4, the light reflector 5 in which the adjustment body 6 is formed on the side surface 7 of the resin body 4 and the light guide plate 11 is pasted, and the process proceeds to step s6. finish. As the light reflector, one in which the non-defective product adjusting body 6 is not formed and one in which the adjusting body 6 is formed so as to correspond to each defective rank are prepared in advance. The light reflector which is not done is affixed, the light reflector 5 according to each rank is affixed to each defective product, and the process is terminated. The array substrate to which the light reflector is attached is assembled as a module to manufacture a backlight device, and a final inspection is performed.

  The adjusting body 6 is formed by applying a fluorescent material to the surface of the light reflector 5. In the linear light source device 1, the chromaticity of light can be adjusted by an adjusting body 6 formed by applying to the light reflector 5, and the chromaticity coordinate value is compared with the chromaticity coordinate values of other portions. If there is a portion with a low value, a fluorescent material may be applied to the portion of the light reflector 5 corresponding to the portion. If the deviation of the chromaticity coordinate values is small, the fluorescent material is applied in a small amount, and if the deviation is large, a large amount of the fluorescent material is applied. Here, the fluorescent material is applied to each of the light reflectors 5. However, the fluorescent material may be applied to only one of them, and whether to apply only to one or both is determined in advance. .

  The light reflector 5 is provided on the array substrate in various forms. For example, the light reflector 5 may be fixed to the array substrate with an adhesive. In this case, an adhesive is applied to a portion where the adjustment body 6 is not applied, and the light reflector 5 is applied to the resin surface of the array substrate. You can just stick. In the case where an adhesive is not used, the light reflector 5 may simply be aligned with the array substrate. In this case, when assembled as a backlight device, the light reflector 5 and the light guide plate 11 are sandwiched in the casing (frame) together with the light reflector 5, so that the light reflector 5 and the array substrate are not bonded. Can be brought into close contact with nature. Further, if the light reflector 5 is processed in a “U” shape and is set on the array substrate so as to be sandwiched from the back surface (non-light emitting side) of the substrate 2, it is possible to prevent displacement. Alternatively, an adhesive may be applied to the opposite surface of the light reflector 5 on which the adjusting body 6 is not applied, and may be adhered to the frame side of the backlight device instead of the array substrate side.

  In order to change the chromaticity, not only the amount of the fluorescent material to be applied may be changed, but also the amount of the fluorescent material that contributes to light emission may be changed by changing the attachment position of the light reflector 5. 5 and 6 are cross-sectional views showing a state when the light reflector 5 is attached. In step s5 described above, when the light reflector 5 is attached, the position of the adjustment body 6 is adjusted by adjusting the attachment position of the light reflector 5 as shown in FIGS. 3 and 6, for example. Can do. In the case of the cross-sectional view shown in FIG. 6, the attachment position of the light reflector 5 is moved to the substrate 2 side (opposite to the light emission direction) as compared with the case of the cross-sectional view shown in FIG. 3. The light emitting element 3 has a directivity characteristic that the light output becomes weaker as it is inclined from a direction perpendicular to the one surface in the thickness direction of the substrate 2 (Z direction) in a direction parallel to the one surface in the thickness direction of the substrate 2. . For this reason, by moving the light reflector 5 in the Z direction, the light applied to the adjusting body 6 becomes weak, and the amount of light emitted by the fluorescent material decreases. As a result, it is possible to adjust the chromaticity by moving the attachment position of the light reflector 5.

  The adjusting body 6 formed on the light reflector 5 is preferably provided in a range W <b> 1 between the resin body 4 and the light reflector 5. This is because when the adjusting body 6 is provided in the region where the light guide plate 11 is formed, the adjusting body 6 is added to the reflecting surface structure of the light guide plate 11 optically designed with the normal light reflector 5. This is because the reflection characteristics change, and chromaticity and luminance unevenness may occur.

  FIG. 7 is an exploded perspective view schematically showing a configuration of a linear light source device 31 according to another embodiment of the present invention. The linear light source device 31 and the linear light source device 1 shown in FIG. 1 described above have the same configuration, and the linear light source device 1 is provided with the adjusting body 6 facing each light emitting element 3. On the other hand, the linear light source device 31 is different only in that the adjustment body 6 is provided in a part of the plurality of portions facing the light emitting element 3 in the light reflector 5, here in one place. Therefore, the same reference numerals are given to the same parts, and the description thereof is omitted. In the linear light source device 31, variation in chromaticity can be suppressed by providing the adjusting body 6 only in a portion having low chromaticity.

  FIG. 8 is an exploded perspective view schematically showing a configuration of a linear light source device 41 according to another embodiment of the present invention. FIG. 9 is an exploded perspective view schematically showing a part of the configuration of the backlight device 42 including the linear light source device 41. The linear light source device 41 and the linear light source device 1 shown in FIG. 7 described above have the same configuration. In the linear light source device 31, the resin body 4 includes the first and second resin bodies 4a, 4a, In the present embodiment, the resin body 4 is different only in that the resin body 4 is realized by a resin containing a fluorescent material. Therefore, the same parts are denoted by the same reference numerals and the description thereof is omitted. Is omitted. That is, the entire resin body 4 is formed of the same material as the first resin body 4a described above. An optical sheet body 14 such as a light diffusion sheet or a prism sheet is provided on the surface of the light guide plate 11.

  Even when configured as the linear light source device 41, the same effect as that of the linear light source device 31 described above can be achieved, and the labor of forming the resin body 4 in two steps can be saved. Can be simplified and productivity can be improved.

  FIG. 10 is an exploded perspective view schematically showing a configuration of a linear light source device 51 according to still another embodiment of the present invention. FIG. 11 is an enlarged cross-sectional view of a part of the backlight device 52 including the linear light source device 51. The linear light source device 51 and the linear light source device 41 shown in FIG. 8 described above have the same configuration. In the linear light source device 41, the adjustment body 6 includes a fluorescent material. In the present embodiment, the adjustment body 6 is different only in that the adjustment body 6 is formed of a reflective material having a reflectance lower than that of the light reflector 5. Therefore, the description is omitted.

  In the present embodiment, the adjusting body 6 is formed of a material having a reflectance of less than 90%, for example, gold (Au). The adjusting body 6 is formed by plating, for example. Since Au has a low reflectance on the short wavelength side and less blue is reflected than yellow, it is possible to adjust the chromaticity coordinates. Further, the adjustment body 6 is formed of a reflective material having a reflectance lower than that of the light reflector 5, so that the amount of light reflected by the adjustment body 6 is less than the amount of light reflected by the light reflector 5. And the luminance can be reduced, and not only the chromaticity but also the luminance can be changed.

  In each of the above-described embodiments, the linear light source device having the plurality of light emitting elements 3 has been described. However, even when the light emitting element is used alone, the adjustment body 6 is used if a light reflector is used. Thus, the chromaticity or luminance can be adjusted. For example, even when the color changes due to overheating during soldering, the chromaticity or luminance can be corrected, and the same effect can be achieved.

  In still another embodiment of the present invention, a linear light source device may be configured by combining the above-described embodiments. For example, in the embodiment shown in FIG. 8, the light emitting element 3 of the light reflector 5. You may provide the adjustment body 6 in the location which faces respectively.

1 is an exploded perspective view schematically showing a configuration of a linear light source device 1 according to an embodiment of the present invention. It is a disassembled perspective view which shows typically a part of structure of the backlight apparatus 20 provided with the linear light source device 1. FIG. 3 is an enlarged cross-sectional view showing a part of the backlight device 20. FIG. 3 is a flowchart showing a manufacturing process of the linear light source device 1. It is sectional drawing which shows a mode when the light reflector 5 is affixed. It is sectional drawing which shows a mode when the light reflector 5 is affixed. It is a disassembled perspective view which shows typically the structure of the linear light source device 31 of the other form of implementation of this invention. It is a disassembled perspective view which shows typically the structure of the linear light source device 41 of the other form of implementation of this invention. It is a disassembled perspective view which shows typically a part of structure of the backlight apparatus 42 provided with the linear light source device 41. FIG. It is a disassembled perspective view which shows typically the structure of the linear light source device 51 of the further another form of implementation of this invention. It is sectional drawing which expands and shows a part of backlight apparatus 52 provided with the linear light source device 51. FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1, 31, 41, 51 Linear light source device 2 Board | substrate 3 Light emitting element 4 Resin body 4a 1st resin body 4b 2nd resin body 5 Light reflector 6 Adjustment body 7 Side surface 20, 42, 52 Backlight apparatus

Claims (6)

A substrate on which a conductive line portion is formed;
A plurality of light emitting elements that are mounted on the substrate in a straight line at intervals and connected to the conductive line portion to emit blue light or ultraviolet light;
When the light emitted from the light emitting element is irradiated, it includes a fluorescent material that emits light having a wavelength longer than the wavelength of the light emitted from the light emitting element, and integrally covers the plurality of light emitting elements, and the thickness direction of the substrate; A resin body having side surfaces extending along the plurality of light emitting elements in a direction perpendicular to the direction in which the light emitting elements are arranged;
A light reflector provided on the side surface of the resin body;
At least one of the portions of the light reflector that faces the light emitting element, at least provided between the resin body and a fluorescent material, and at least a reflective material having a reflectance lower than that of the light reflector A linear light source device comprising: an adjusting body formed by any of the above. The resin body is
A first resin body containing the fluorescent material and individually covering each light emitting element;
2. The wire according to claim 1, further comprising: a second resin body that is transparent to light emitted from the first resin body and that integrally covers the plurality of first resin bodies. Light source device.   3. The linear light source device according to claim 2, wherein a refractive index of the first resin body and a refractive index of the second resin body are selected to be equal to or substantially equal to each other.   The linear light source device according to claim 1, wherein the adjustment body is formed only between the light reflector and the resin body. A plurality of light emitting elements that emit blue light or ultraviolet light connected to the conductive line portion and mounted on the substrate on which the conductive line portion is formed are linearly mounted with a space between each other,
When the light emitted from the light emitting element is irradiated, it includes a fluorescent material that emits light having a wavelength longer than the wavelength of the light emitted from the light emitting element, and is mutually in the thickness direction of the substrate and the direction in which the light emitting elements are arranged. A plurality of the light emitting elements are integrally covered with a resin body having side surfaces extending along the plurality of light emitting elements in a vertical direction,
A light reflector formed by applying a fluorescent material to a part of one surface or applying a reflective material having a reflectance lower than the reflectance of the remaining part to be removed, and the adjustment body includes a plurality of adjustment bodies. A method of manufacturing a linear light source device, wherein the linear light source device is attached to the side surface of the resin body so as to face at least one of the light emitting elements and be provided at least between the resin body. The resin body is
Each light emitting element is individually covered by the first resin body containing the fluorescent material,
The linear light source according to claim 5, wherein the plurality of first resin bodies are integrally covered with a second resin body that is transparent to light emitted from the first resin body. Device manufacturing method.

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