JP2012123945A - Light source module, display device, and lighting device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a light source module, a display device, and a lighting device capable of changing light-distribution characteristics.SOLUTION: In the light source module 10, a plurality of LEDs 1 are mounted on a board 2 with a rectangular shape while they are arranged at a properly separated dimension. Various kinds of lenses 3 or 4 having different light-distribution characteristics (relationship of relative luminosity to an emitting angle) are mounted on each LED 1. Due to the lenses 3, 4, the light emitted from the LEDs 1 can be diffused in a direction approximately parallel to the surface of the board 2 as well as a right above direction. Further, light-distribution of the light emitted from the lenses 3, 4 can be changed since the lenses 3, 4 have different light-distribution characteristics.

Description

  The present invention relates to a light source module including a plurality of light sources mounted on a substrate, a display device including the light source module, and an illumination device.

  In recent years, with the increase in luminance of light emitting diodes (LEDs), instead of light sources such as incandescent bulbs and fluorescent lamps, LEDs having characteristics such as low power consumption and long life are used as display devices such as signs or signs, or It is being used for lighting devices and the like.

  When an LED is used as a light source, a convex lens that condenses the light emitted from the LED may be used to effectively use the light. However, the light distribution characteristic is limited to a fairly narrow angle around the optical axis due to the lens effect. There is a problem that.

  Therefore, an LED module that realizes a light distribution pattern required for an illumination lamp by changing the light distribution characteristics of the LED by changing the depth dimension of the storage recess for storing the LED or the radius of curvature of the transparent resin lens. It is disclosed (see Patent Document 1).

No. 7-44029

  However, in the LED module of Patent Document 1, since the storage recess is formed on the substrate surface, once the depth dimension of the storage recess is determined and the storage recess is formed, the depth dimension cannot be changed. Because it is not possible, it is not possible to change the light distribution as a lighting fixture. Moreover, since the transparent resin lens having a lens configuration with a different radius of curvature is formed corresponding to each LED on the substrate, the light distribution characteristic of each LED is unambiguous once the transparent resin lens is formed. The light distribution as an illumination lamp cannot be changed. On the other hand, in a display device such as a signboard or a sign or a lighting device, it is desired to change the light distribution characteristic according to the installation environment or the application.

  This invention is made | formed in view of such a situation, and it aims at providing the light source module which can change a light distribution characteristic, a display apparatus provided with this light source module, and an illuminating device.

  The light source module according to the present invention includes a lens for controlling light distribution of the light source in a light source module including a plurality of light sources mounted on one or a plurality of substrates, and selects a position of the light source on which the lens is mounted. The light distribution can be changed.

  In the present invention, the lens for controlling the light distribution of the light source can be changed by selecting the position of the light source on which the lens is mounted. Selecting the position of the light source on which the lens is mounted includes both cases of selecting the position of only the lens mounted on the light source and selecting the position of the light source itself on which the lens is mounted. For example, among the light sources that are pre-arranged and mounted on the substrate, the light distribution to which the lens is mounted, that is, the position of only the lens is selected to change the light distribution. In addition, the light distribution can be changed by selecting a position for each light source equipped with a lens. Thereby, the position of a lens can be changed and a light distribution characteristic can be changed, and a required light distribution can be obtained.

  The light source module according to the present invention includes a plurality of substrates each mounted with a light source, and an accommodating portion that accommodates each of the substrates, and is configured to adjust the light distribution by changing the position of the substrate. It is characterized by being.

  The present invention includes a plurality of substrates each mounted with a light source, and an accommodating portion that arranges and accommodates each substrate. Then, the light distribution is adjusted by changing the position of each substrate. By changing the position of each substrate on which the light source equipped with the lens is mounted within the housing, the light distribution characteristics can be changed, and the required light distribution can be obtained.

  The light source module according to the present invention includes a plurality of types of lenses having different light distribution characteristics, and the plurality of types of lenses are attached to an arbitrary light source among the plurality of light sources.

  In the present invention, a plurality of types of lenses having different light distribution characteristics are provided, and a plurality of types of lenses are attached to an arbitrary light source among the plurality of light sources. By changing the light source to which a plurality of types of lenses having different light distribution characteristics are attached, for example, the light distribution characteristic by the light source having the lens having the first light distribution characteristic and the second light distribution different from the first light distribution characteristic are used. The light distribution characteristics of the light source equipped with the lens having the light characteristics can be made different, and the position of the light source equipped with the lens having the different light distribution characteristics can be freely changed, so that the required light distribution can be obtained.

  The light source module according to the present invention is characterized in that the plurality of types of lenses have light distribution characteristics in which a light intensity difference between a maximum peak light intensity and a light intensity in an optical axis direction is different.

  In the present invention, the plurality of types of lenses have light distribution characteristics in which a difference in light intensity between the light intensity at the maximum peak and the light intensity in the optical axis direction is different. For example, the light distribution characteristic of the lens (the relationship between the relative luminous intensity and the emission angle) is such that the relative luminous intensity is almost uniform and small in the range where the emission angle is small (ie, near the optical axis direction), and the emission angle is 90 degrees (ie horizontal In the case of having the maximum peak of the relative luminous intensity as approaching (direction), the first light distribution characteristic is such that the relative luminous intensity is small and the maximum peak of the relative luminous intensity is large in the range where the emission angle is small. The characteristics can be such that the relative luminous intensity is greater than the first light distribution characteristic in a range where the emission angle is small, and the maximum peak of relative luminous intensity is smaller than the first light distribution characteristic. Thereby, the light of a light source can be spread | diffused in a wide range, ensuring the illumination intensity of the optical axis direction (directly upward direction) of a light source.

  The light source module according to the present invention is characterized in that the light source is an LED.

  In the present invention, the light source is an LED. Thereby, the light source module which used LED as the light source can be provided.

  A display device according to the present invention includes the light source module according to any one of the above-described inventions.

  In the present invention, it is possible to provide a display device capable of improving the degree of freedom of light distribution characteristics.

  An illumination device according to the present invention includes the light source module according to any one of the above-described inventions.

  In this invention, the illuminating device which can improve the freedom degree of a light distribution characteristic can be provided.

  According to the present invention, by adjusting the light distribution by attaching the lens to an arbitrary light source, the position of the lens can be changed to change the light distribution characteristic, and the required light distribution can be obtained.

It is a top view which shows an example of a structure of the light source module of this Embodiment. It is side surface sectional drawing which shows an example of a structure of the light source module of this Embodiment. It is explanatory drawing which shows an example of the light distribution characteristic of a lens. It is a top view which shows the other example of a structure of the light source module provided with the multiple types of lens from which a light distribution characteristic differs. It is a top view which shows an example of a structure of the light source module provided with one type of lens. 6 is a plan view showing an example of a configuration of a light source module according to Embodiment 2. FIG. It is explanatory drawing which shows an example of the external appearance of a head block. It is explanatory drawing which shows an example of the external appearance of a light source block. It is explanatory drawing which shows an example of the external appearance of a spacer block. It is explanatory drawing which shows an example of the external appearance of a light source block. It is explanatory drawing which shows an example of the external appearance of a termination | terminus block. It is a longitudinal cross-sectional view of a mounting member. 6 is an explanatory diagram illustrating an example of a circuit configuration of a light source module according to Embodiment 2. FIG. FIG. 10 is a plan view illustrating a second example of the configuration of the light source module according to the second embodiment. 6 is an explanatory diagram illustrating a circuit configuration of a second example of the light source module according to Embodiment 2. FIG. 6 is an explanatory diagram illustrating an example of a waterproof structure of a light source module according to Embodiment 2. FIG. It is a top view which shows the example of arrangement | positioning of the light source module in the display apparatus of this Embodiment. It is a side view which shows the example of arrangement | positioning of the light source module in the display apparatus of this Embodiment.

(Embodiment 1)
Hereinafter, the present invention will be described with reference to the drawings illustrating embodiments thereof. FIG. 1 is a plan view showing an example of the configuration of the light source module 10 of the present embodiment, and FIG. 2 is a side sectional view showing an example of the configuration of the light source module 10 of the present embodiment.

  In the light source module 10, a plurality of LEDs 1 as light sources are arranged and mounted on a rectangular substrate 2 with appropriate separation dimensions (for example, about 100 mm). The length of the light source module 10 is, for example, about 1200 mm, and the width is about 50 mm. The number of the substrates 2 may be one or may be divided into a plurality of substrates. In the following description, the LED 1 is a light source, and the LED 1 with a lens 3 and 4 (described later) and the LED 1 without a lens are also treated as a light source.

  A required wiring pattern is formed on the substrate 2. A power source is connected to the substrate 2 through a power line, and the required power can be supplied to each LED 1 to light the LED 1 with a required brightness.

  The LED 1 may have a desired light emitting color such as a light bulb color, day white, white, daylight, red, green, or blue depending on the application of the light source module 10.

  Each LED 1 is equipped with a plurality of types of lenses 3 or lenses 4 having different light distribution characteristics (relationships of relative luminous intensity with respect to the emission angle) in order to control light distribution. More specifically, the lens 3 or the lens 4 is disposed on the upper side of the LED 1. In the example of FIG. 1, lenses 3 and 4 are alternately mounted in order on 12 LEDs 1 arranged in a straight line. However, the number or arrangement pattern of LEDs, the number of types of lenses, and lenses 3 The arrangement (mounting position) 4 is not limited to the example of FIG. The lenses 3 and 4 have substantially the same shape and have different light distribution characteristics.

  The lens 3 is made of, for example, transparent acrylic and has a substantially disk shape. As shown in FIG. 2, the lens 3 has a substantially trapezoidal cross-sectional shape, and is formed with a convex curved surface from the side surface to the upper surface. A recess 31 larger than the size of the LED 1 is provided at the center of the lens 3, and the lens 3 is mounted on the substrate 2 so that the LED 1 is disposed in the recess 31.

  The lens 3 has several protrusions formed on the bottom surface, and can be mounted on the substrate 2 by attaching a thermosetting adhesive to the protrusions and thermosetting at a predetermined temperature.

  The lens 4 has the same configuration as the lens 3. The material of the lens 3 is not limited to acrylic. For example, polycarbonate can be used, but an acrylic product excellent in transparency is more preferable.

  By the lenses 3 and 4, the light emitted from the LED 1 can be diffused in a direction substantially parallel to the surface of the substrate 2 as well as the optical axis direction (directly upward direction). Further, since the lenses 3 and 4 have different light distribution characteristics, the light distribution of the light emitted from the lenses 3 and 4 can be changed.

  FIG. 3 is an explanatory diagram showing an example of the light distribution characteristics of the lenses 3 and 4. In FIG. 3, the horizontal axis indicates the emission angle, and the vertical axis indicates the relative luminous intensity. When the emission angle is 0 degree, the optical axis direction (directly upward direction) of the lenses 3 and 4, that is, the direction perpendicular to the surface of the substrate on which the LED 1 is mounted. The emission angle of 90 degrees or -90 degrees indicates the horizontal direction, that is, the horizontal direction parallel to the surface of the substrate on which the LED 1 is mounted.

  In FIG. 3, the curve indicated by the symbol A indicates the light distribution characteristic of the lens 3, and the curve indicated by the symbol B indicates the light distribution characteristic of the lens 4. As shown in FIG. 3, the lenses 3 and 4 have a maximum peak of relative luminous intensity around an emission angle of ± 70 to 80 degrees and a small emission angle (for example, approximately −20 degrees to 20 degrees), that is, The relative luminous intensity is substantially uniform and small in the vicinity of the optical axis direction (directly upward direction). That is, it has a light distribution characteristic in which the light intensity difference between the light intensity at the maximum peak and the light intensity in the optical axis direction is different.

  As shown in FIG. 3, the light distribution characteristics of the lenses 3 and 4 are different. Regarding the light distribution characteristics of the lens 3 (curve A), the relative luminous intensity is small and the maximum peak of the relative luminous intensity is large in a range where the emission angle is small. That is, the light emitted from the lens 3 diffuses light over a wide range while suppressing the illuminance in the optical axis direction. On the other hand, the light distribution characteristic of the lens 4 (curve B) is such that the relative luminous intensity is larger than the light distribution characteristic of the lens 3 in the range where the emission angle is small, and the maximum peak of the relative luminous intensity is smaller than the light distribution characteristic of the lens 3. That is, the light emitted from the lens 4 has higher illuminance in the optical axis direction than that of the lens 3. By combining the lenses 3 and 4, light from the light source can be diffused over a wide range while ensuring illuminance on the optical axis of the light source.

  As described above, a plurality of types of lenses 3 and 4 having different light distribution characteristics are provided to control the light distribution, and the light distribution can be changed by selecting the position of the LED 1 (light source) to which the lenses 3 and 4 are attached. To do. Here, selecting the position of the LED 1 to which the lenses 3 and 4 are attached includes the case of selecting the position of only the lenses 3 and 4 to be attached to the LED 1. For example, among the LEDs 1 that are pre-arranged and mounted on the substrate, the position of only the LED 1 to which the lenses 3 and 4 are attached, that is, the lenses 3 and 4 are selected, and the light distribution can be changed. In the example of FIG. 1, the LEDs to which the lenses 3 and 4 are attached are alternately selected with respect to the 12 LEDs 1 arranged in a straight line. By changing the position of the LED 1 to which the lenses 3 and 4 having different light distribution characteristics are attached (selecting the position of the light source), for example, the light distribution characteristic by the LED 1 to which the lens 3 is attached and the light distribution characteristic of the lens 3 are different. The light distribution characteristic of the LED 1 equipped with the lens 4 with the light distribution characteristic can be made different, and the position of the LED 1 with the lens with the different light distribution characteristic can be freely changed. Light distribution can be obtained.

  FIG. 4 is a plan view showing another example of the configuration of the light source module 10 including a plurality of types of lenses 3 and 4 having different light distribution characteristics. In the example of FIG. 1, the positions of the LEDs 1 to which the lenses 3 and 4 having different light distribution characteristics are mounted are alternately repeated. However, the positions of the lenses 3 and 4 are not limited to the example of FIG. 1. In the example of FIG. 4, the position of the LED 1 to which the lenses 3 and 4 are attached is changed compared to the case of FIG. 1. Thereby, required light distribution can be obtained by freely changing the position of the LED 1 to which the lens having different light distribution characteristics is attached.

  FIG. 5 is a plan view showing an example of the configuration of the light source module 10 including one type of lens 3. In the example of FIG. 1, the positions of the LEDs 1 on which the lenses 3 and 4 having different light distribution characteristics are mounted are alternately repeated. However, the present invention is not limited to this, and one type of lens is mounted on the LED 1. The light distribution characteristic can also be adjusted. As shown in FIG. 5, the light distribution can be adjusted by selecting the position of the LED 1 to which the lens 3 is mounted from among the 12 LEDs 1. In FIG. 5, the lens 4 can be used instead of the lens 3.

  That is, the LED 1 to which the lens is attached is selected from the plurality of LEDs 1 to adjust the light distribution. By changing the LED 1 to which the lens is attached, the light distribution characteristic of the LED 1 with the lens and the light distribution characteristic of the LED 1 without the lens are different, and the LED 1 having different light distribution characteristics depending on the presence or absence of the lens 3 is different. Since the position can be freely changed, the required light distribution can be obtained.

  1, 4, and 5 do not illustrate an attachment portion for attaching the substrate 2, but the attachment portion is appropriately provided according to the shape of the substrate 2 and attached in the display device or the illumination device. be able to.

(Embodiment 2)
In the first embodiment described above, the light source module 10 has a configuration in which the plurality of LEDs 1 are mounted on the rectangular substrate 2. Block) can also be used.

  FIG. 6 is a plan view showing an example of the configuration of the light source module 20 of the second embodiment. The light source module 20 has a configuration in which a head block 11, light source blocks 12, 14, a spacer block 13, and a terminal block 15 are appropriately arranged on a mounting member 21 as a housing portion that houses a plurality of substrates (substrate blocks). Eggplant. A leading block 11 and a terminal block 15 are disposed at both ends of the mounting member 21, and an appropriate number of light source blocks 12 and 14 are disposed between the leading block 11 and the terminal block 15, and the light source block By arranging the spacer block 13 between 12 and 14, the positions of the light source blocks 12 and 14 can be changed. In addition, arrangement | positioning of the head block 11, the light source blocks 12 and 14, the spacer block 13, and the termination | terminus block 15 is not limited to the example of FIG.

  FIG. 7 is an explanatory diagram showing an example of the appearance of the head block 11. Reference numerals A to D denote a plane, side surfaces, and both end surfaces of the leading block 11, respectively. The leading block 11 has a step 115 formed on both side surfaces of a substantially rectangular parallelepiped block body 110. Wirings 111 and 112 are connected to one end face, and power plugs 101 and 102 are provided to the other end face. The power plugs 101 and 102 are inserted into and electrically connected to power sockets 111 and 112 described later.

  FIG. 8 is an explanatory diagram showing an example of the appearance of the light source block 12. Reference numerals A to D denote a plane, side surfaces, and both end surfaces of the light source block 12, respectively. The light source block 12 has steps 125 formed on both side surfaces of a substantially rectangular block main body 120. Power sockets 111 and 112 are provided on one end face, and power plugs 101 and 102 are provided on the other end face. The power plugs 101 and 102 are inserted into the power sockets 111 and 112 to be electrically connected.

  The LED 1 is mounted on the upper surface of the block main body 120, and the lens 3 for controlling the light distribution is mounted on the LED 1. Further, a reflecting plate 126 is provided around the lens 3 so as to reflect light emitted from the LED 1 and irradiate it upward or around. The lens 3 has a light distribution characteristic similar to that of the first embodiment.

  FIG. 9 is an explanatory view showing an example of the appearance of the spacer block 13. Reference signs A to D denote a plane, side surfaces, and both end surfaces of the spacer block 13, respectively. The spacer block 13 has a step 135 formed on both side surfaces of a substantially rectangular block main body 130. Power sockets 111 and 112 are provided on one end face, and power plugs 101 and 102 are provided on the other end face.

  FIG. 10 is an explanatory diagram showing an example of the appearance of the light source block 14. Reference signs A to D denote a plane, side surfaces, and both end surfaces of the light source block 14, respectively. The light source block 14 has steps 145 formed on both side surfaces of a substantially rectangular parallelepiped block body 140. Power sockets 111 and 112 are provided on one end face, and power plugs 101 and 102 are provided on the other end face. The power plugs 101 and 102 are inserted into the power sockets 111 and 112 to be electrically connected.

  The LED 1 is mounted on the upper surface of the block main body 140, and the lens 4 for controlling the light distribution is mounted on the LED 1. Further, a reflecting plate 146 is provided around the lens 4 so as to reflect the light emitted from the LED 1 and irradiate it upward or around. The lens 4 has a light distribution characteristic similar to that of the first embodiment.

  FIG. 11 is an explanatory diagram showing an example of the appearance of the terminal block 15. Reference numerals A to D denote a plane, side surfaces, and both end surfaces of the termination block 15, respectively. The end block 15 has a step 155 formed on both side surfaces of a substantially rectangular parallelepiped block body 150. Power sockets 111 and 112 are provided on one end face.

  FIG. 12 is a longitudinal sectional view of the mounting member 21. As shown in FIG. 12, the mounting member 21 has a substantially U-shaped cross section, and has two groove portions 211 and 212 arranged to face each other along the longitudinal direction. By fitting the steps 115, 125, 135, 145, and 155 of the top block 11, the light source blocks 12 and 14, the spacer block 13, and the end block 15 to the grooves 211 and 212, the top block 11, the light source block 12, 14, the spacer block 13 and the terminal block 15 can be accommodated in the mounting member 21. The mounting member 21 serving as a housing portion protects the plurality of light source blocks 12 and 14 connected and wired, and also has an effect of reinforcing in order to maintain a connected state even when an external force or the like is applied.

  The mounting member 21 containing the head block 11, the light source blocks 12, 14, the spacer block 13, and the terminal block 15 can be attached to a chassis such as a display device or a lighting device.

  The spacer block 13 has an object of adjusting the light distribution of the light source modules 12 and 14 by adjusting the distance between the light source blocks 12 and 14 to connect the light source blocks 12 and 14 to each other. This is for adjusting (changing) the desired light distribution by changing the position at which the spacer block 13 is mounted or by changing the number of the light source blocks 12 and 14 to be mounted.

  Also in the above-described configuration, the lenses 3 and 4 that control the light distribution of the light source can be changed by selecting the position of the LED 1 (light source) on which the lenses 3 and 4 are mounted. Selecting the position of the LED 1 (light source) on which the lenses 3 and 4 are mounted includes selecting the position of the LED 1 (light source) itself on which the lenses 3 and 4 are mounted. The LED 1 (light source) to which the lenses 3 and 4 are attached is the light source block 12 and 14 described above. That is, the light distribution can be changed by selecting a position for each “LED 1 with the lenses 3 and 4” (light source blocks 12 and 14). The light distribution characteristics can be changed by changing the positions of the light source blocks 12 and 14 mounted with the LEDs 1 to which the lenses 3 and 4 are mounted within the mounting member 21 (selecting the position of the light source). Can be changed to obtain the required light distribution. In order to change the positions of the light source blocks 12 and 14, the number of the spacer blocks 13 may be adjusted.

  FIG. 13 is an explanatory diagram illustrating an example of a circuit configuration of the light source module 20 according to the second embodiment. The light source module 20 is supplied from a constant current power source (not shown) to the leading block 11, the light source blocks 12 and 14, the spacer block 13, and the terminal block 15 electrically connected via the power plugs 101 and 102 and the power sockets 111 and 112. Necessary power is supplied. The light source blocks 12 and 14 are connected to a resistor 5 for adjusting the current flowing through the LED 1. The leading block 11 is provided with a fuse 7 for protecting the circuit from overcurrent.

  FIG. 14 is a plan view showing a second example of the configuration of the light source module 20 of the second embodiment, and FIG. 15 is an explanatory diagram showing the circuit configuration of the second example of the light source module 20 of the second embodiment. . As shown in FIG. 14, the head block 11 and the terminal block 15 are mounted on both ends of the mounting member 21, and the positions of the light source blocks 12 and 14 can be arbitrarily changed between the head block 11 and the terminal block 15. it can. The positions of the light source blocks 12 and 14 can be changed according to the position and number of the spacer blocks 13.

  In the above-described example, the light source blocks having a plurality of types of light distribution characteristics such as the light source blocks 12 and 14 are used. However, the present invention is not limited to this. For example, only one of the light source blocks 12 and 14 may be used, and the position of the one light source block may be changed depending on the number and arrangement of the spacer blocks 13. In the above example, the lenses 3 and 4 are mounted on the LED 1, but a light source block in which no lens is mounted on the LED 1 can also be used. The light distribution characteristics of the light source block with the lens and the light distribution characteristics of the light source block without the lens can be made different, and the positions of the light source blocks with different light distribution characteristics can be freely changed. Light distribution can be obtained.

  FIG. 16 is an explanatory diagram illustrating an example of a waterproof structure of the light source module 20 according to the second embodiment. In the example of FIG. 16, the connection portion between the leading block 11 and the spacer block 13 will be described, but the connection structure between the other blocks is the same.

  As shown in FIG. 16, a convex portion 116 having a rectangular cross-sectional shape is provided at the end portion of the leading block 11, and power plugs 101 and 102 are provided on the end surface of the convex portion 116. A recess 136 having a rectangular cross section is provided at the end of the spacer block 13, and power sockets 111 and 112 are provided in the recess 136. Then, by providing the waterproof packing 137 around the inner peripheral surface of the concave portion 136 (or the outer peripheral surface of the convex portion 116), it is possible to prevent moisture from entering from the outside.

  FIG. 17 is a plan view showing an arrangement example of the light source modules 10 in the display device 100 of the present embodiment, and FIG. 18 is a side view showing an arrangement example of the light source modules 10 in the display device 100 of the present embodiment. The display device 100 is, for example, a signboard. In the example of FIGS. 17 and 18, for example, the vertical and horizontal thickness dimensions of the signboard body are, for example, about 750 mm × 1300 mm × 100 mm, and the length of the light source module 10 is about 1200 mm. As shown in FIG. 17, the light source module 10 is attached to the substantially center part of the signboard body along the longitudinal direction. An acrylic diffusion plate 102 is provided on the surface of the signboard. In addition, it can replace with the light source module 10 of Embodiment 1, and the light source module 20 of Embodiment 2 can also be used.

  Note that the shape and size of the signboard body and the arrangement and number of the light source modules 10 and 20 are not limited to the examples of FIGS. 17 and 18 and can be appropriately determined according to the application. Further, the above-described embodiment of the display device can also be applied to a lighting device. That is, the arrangement as shown in FIGS. 17 and 18 can be adopted even in the lighting apparatus, but the vertical and horizontal dimensions and the number or arrangement of the light source modules should be appropriately determined according to the size of the lighting apparatus. Can do.

  By combining light sources with different light distribution characteristics (LEDs without lenses, LEDs with lenses with predetermined light distribution characteristics, LEDs with lenses with different light distribution characteristics) in the direction of the optical axis (that is, the surface of the signboard) It is possible to obtain the illuminance with respect to the periphery of the signboard while maintaining the illuminance in the direction perpendicular to the sign.

  In place of the light source module 20 of the second embodiment, an LED module as in the prior art (a lens is attached to the LED, the LED and the lens are integrated and fixed, and the light distribution characteristic of the LED is uniquely determined. It is also possible to change the light distribution by housing the LED module in the housing portion and selecting the position of the LED module.

  When the light distribution characteristics of the light source are uniquely fixed as in the conventional case, when obtaining the illuminance in the optical axis direction (directly upward direction), the thickness of the signboard is equal to the light source arrangement interval. Therefore, it has been difficult to make the signboard thinner. In addition, when the light distribution characteristic of the light source is uniquely fixed, it is not possible to obtain sufficient illuminance in the optical axis direction when obtaining ambient illuminance. In this embodiment, since the position of the light source having different light distribution characteristics can be changed to a desired position, the signboard can be thinned while obtaining the illuminance in the optical axis direction, and light distribution as the signboard is free. Can be adjusted. In addition, the light can be emitted not only in the direction of the optical axis but also to the peripheral part of the signboard, so that a uniform light emitting surface can be secured, the number of light sources can be reduced as compared with the prior art, and power can be saved. it can. Further, if the light source is centrally arranged at the central portion of the signboard, the necessary light can be emitted from the entire signboard, so that it is not necessary to attach the light source to the entire signboard casing, and workability can be improved.

  In the above-described embodiment, the light source blocks 12 and 14 have one LED 1 and are mounted with lenses having different light distribution characteristics. However, the present invention is not limited to this, and a plurality of LEDs are provided in the light source block. The structure provided may be sufficient. And the kind of lens with which several LED of a light source block is mounted | worn can also be changed for every light source block.

  In the above-described embodiment, the LED is used as the light source. However, the light source is not limited to the LED, and may be a light emitting element such as an EL.

1 LED (light source)
2 Substrate (substrate)
3, 4 Lens (light source)
12, 14 Light source block (substrate)
21 Mounting member (accommodating part)
10, 20 Light source module

Claims (7)

In a light source module comprising a plurality of light sources mounted on one or a plurality of substrates,
A lens for controlling the light distribution of the light source;
A light source module configured to change a light distribution by selecting a position of a light source to which the lens is mounted. A plurality of substrates each mounted with a light source;
An accommodation section for arranging and accommodating each of the substrates,
The light source module according to claim 1, wherein the light source module is configured to adjust light distribution by changing a position of the substrate. With multiple types of lenses with different light distribution characteristics,
The light source module according to claim 1, wherein the plurality of types of lenses are attached to an arbitrary light source among the plurality of light sources. The plurality of types of lenses are:
The light source module according to claim 3, wherein the light source module has a light distribution characteristic in which a light intensity difference between a light intensity at a maximum peak and a light intensity in an optical axis direction is different. The light source is
It is LED, The light source module as described in any one of Claim 1- Claim 4 characterized by the above-mentioned.   A display device comprising the light source module according to any one of claims 1 to 5.   An illumination device comprising the light source module according to any one of claims 1 to 5.

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