JP2013080686A - Lighting system and straight tube type led lamp - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a lighting system in which dazzling due to appearance of a luminescent image of an LED element can be prevented, and further, illuminance of lighting and diffusion of light can be sufficiently obtained.SOLUTION: A cover 13 (gutter-shaped member) for covering an LED substrate 11 is made transparent, and a transparent light diffusion plate 14 is installed in parallel to the surface of the substrate 11 between the cover 13 and the LED substrate 11. Repeating unevennesses 14d or the like which are mutually parallel are provided on a surface 14a far from the substrate 11 of the light diffusion plate 14, and the contour lines of the unevennesses are made of a vertical line segment to the row of the LED element 11a and a line segment connected aslant to it.

Description

Detailed Description of the Invention

  The present invention relates to an illuminating device and a straight tube type LED lamp, and in particular, an illuminating device in which individual light emission images of light emitting elements such as LEDs cannot be seen from the front surface and high illuminance can be obtained in a wide range on the front surface, and a straight tube type. It relates to an LED lamp.

  Energy efficient LED lamps have been commercialized in the form of light bulbs, but in recent years, so-called “straight tube type” lamps have also been rapidly commercialized, and LED boards, aggregates that support them, and LED boards The mainstream is a cylindrical or semi-cylindrical cover for protection and light diffusion. A typical conventional straight tube type LED lamp is an elongate LED substrate having a row of LED elements mounted on one surface, an elongate support member (aggregate) for supporting the elongate LED substrate, and is translucent in the longitudinal direction. (1) The LED substrate, the support member, and the bowl-shaped member are arranged such that their longitudinal axes are parallel to each other, and (2) the bowl-shaped member is The LED board is disposed so as to remotely cover the surface of the LED substrate and the opening extending in the lengthwise direction is closed by the support member. (3) The LED substrate has the LED element surface on the inner surface of the bowl-shaped member. Is supported by a support member. Such a straight tube type LED lamp is disclosed in, for example, Utility Model Registration 3142652 (Patent Document 3) (the support member is not specified).

  FIG. 11 shows such a conventional straight tube type LED lamp. The LED lamp 90 includes an LED substrate 91, a support member 92, and a bowl-shaped member 93. A row of LED elements 91 a is mounted on the LED substrate 91 and fixed to the support member 92. The hook-shaped member 93 is translucent and has a circular cross section perpendicular to the axial direction. By fitting the edge of the hook-shaped member 93 into the slit 92 a at the edge of the support member 92, the hook-shaped member 93 is fixed to the support member 92 so that the axes are parallel to each other. . In order to appropriately diffuse the light from the LED element to the front surface of the lamp and to prevent the light source from being directly seen and dazzling, the bowl-shaped member 93 is translucent.

  FIG. 12 shows the progress of main light fluxes in a cross section perpendicular to the length direction of the LED lamp 90. The light emitted from the LED element 91a travels in the opposite direction to the support member 92, passes through the translucent bowl-shaped member 93, is mostly scattered, and partially travels straight and is emitted to the front of the lamp. The

  In addition to the one shown in FIG. 11, there is an illumination device disclosed in Japanese Patent Application Laid-Open No. 2010-165647 (Patent Document 1). This lighting device includes a solid-state light emitting element, a support that supports the solid-state light emitting element, and a cylindrical casing having light transmittance in at least a light emitting direction of the solid-state light emitting element. The support is disposed so as to be in close contact with the “region”, and this “predetermined region” is characterized by being positioned symmetrically with respect to the central axis of the cross section perpendicular to the longitudinal direction of the casing.

  FIG. 13 shows a cross section perpendicular to the longitudinal direction of a straight tube type LED lamp described in Patent Document 1. The solid state light emitting device 126 is mounted on a substrate 122, and the latter is supported by a support body 121. The support 121 is in close contact with and held on the inner wall of the housing 103 at portions 131a, 131b, 132a, and 132b at both ends thereof.

  JP 2010-165647 A   JP2011-60719   Utility model registration 3142652

  However, in the conventional straight tube type LED lamp, by making the substance or at least one surface of the cover member (the bowl-shaped member 93 in FIG. 11 and the housing 103 in FIG. 13) light-scattering, The illuminance distribution is flattened. As a result, light is attenuated due to scattering and absorption by the cover member, and the illuminance obtained is reduced. This attenuation reaches about 30% as compared with the case where a transparent cover member having the same thickness is used.

  On the other hand, when the scattering property of the cover member is not sufficient, when viewed from the front, the light emission images of the individual LED elements are directly visible, so that it is felt dazzling, and the quality as illumination is significantly impaired.

  Therefore, an object of the present invention is to realize an illuminating device in which light is diffused to such an extent that a light emission image of an individual solid-state light emitting element cannot be seen at all, and high illuminance can be obtained at a wide angle on the front surface.

  Another object of the present invention is to realize a straight tube lamp in which light is diffused to such an extent that a light emission image of an individual solid state light emitting device is not seen at all, and high illuminance is obtained at a wide angle on the front surface.

  Another object of the present invention is to realize a straight tube type LED lamp in which light is diffused to such an extent that an emission image of an individual LED element cannot be seen at all, and high illuminance can be obtained at a wide angle at the front surface.

  In order to achieve the above object, the lighting device of the present invention is separated from a wiring board having a row of solid light emitting elements mounted on one surface and a surface of the wiring board (with a row of solid light emitting elements mounted), A light control member made of a transparent flat plate arranged in parallel to the surface is provided. The light control member has repetitive irregularities having contour lines parallel to each other on a first surface far from the wiring board. The uneven contour line is composed of a line segment perpendicular to the column direction of the solid-state light emitting elements and a line segment obliquely connected to the line segment, and the second surface facing the wiring board is a rough surface. . “Connect diagonally” means that the angle between each line segment is smaller than a right angle and not a right angle at the point where the line segments are connected to each other. It means a small case (the same applies to the following description). The unevenness of the second surface (rough surface) is advantageously different from the unevenness of the first surface. The lighting device may include a cover member that remotely covers the light emitting element side of the wiring board. The cover member is usually a bowl-like or tubular shape in which at least a part of a cross section perpendicular to the axial direction is an arc, and is long. A vertical axis is arranged in parallel with the wiring board. The light control member is disposed in a space surrounded by the bowl-shaped or tubular cover member in parallel to the wiring board but apart from the space.

  In order to achieve the object of the present invention, a straight tube lamp includes an elongated wiring board having a row of solid light emitting elements mounted on one surface, an elongated support member for supporting the wiring board, and a light-transmitting bowl-shaped lamp. The wiring board, the support member, and the bowl-shaped member are arranged in parallel with each other in the longitudinal direction, and the bowl-shaped member is formed on the surface of the wiring board (in which a row of solid light emitting elements is mounted). (Hereinafter, referred to as a light emitting surface), and the opening extending in the axial direction is disposed so as to be closed by the support member, and the wiring board is supported so that the light emitting surface faces the bowl-shaped member. In the straight tube lamp supported by the member, the bowl-shaped member is transparent except for a predetermined region near the opening, and is disposed in a space surrounded by the bowl-shaped member in parallel with the light emitting surface of the wiring board. A light control member comprising a transparent flat plate, and this light control unit Has a repetitive unevenness with contour lines parallel to each other on the first surface far from the wiring board, and the uneven contour line is connected to a line segment perpendicular to the column direction of the solid state light emitting element and obliquely connected to this line segment. The second surface facing the wiring board is a rough surface, and the predetermined region is in a range from the opening end of the opening to the extension of the second surface of the light control member, and has a light scattering property. It is characterized by having. It is advantageous that the second surface (rough surface) has unevenness different from the unevenness of the first surface.

  In order to achieve the object of the present invention, a straight tube type LED lamp includes an elongated LED substrate having a row of LED elements mounted on one surface, an elongated support member that supports the LED substrate, and a light transmissive axial direction. The LED substrate, the support member, and the bowl-shaped member are arranged in parallel with each other in the longitudinal direction, and the bowl-shaped member is formed of a bowl-shaped member having a cross section perpendicular to the arc. A light emitting surface (a surface on which a row of LED elements is mounted; the same applies hereinafter) is disposed so that an opening extending in the axial direction is closed by a support member. In the straight tube type LED lamp supported by the support member so as to face the bowl-shaped member, the bowl-shaped member is transparent except for a predetermined region, and the light emitting surface of the LED substrate is in a space surrounded by the bowl-shaped member. Transparent arranged parallel to A light control member comprising a plate, the light control member having repetitive irregularities having contour lines parallel to each other on a first surface far from the LED substrate, and the contour lines of the irregularities are perpendicular to the direction of the row of LED elements And a second surface facing the LED substrate is a rough surface. It is advantageous that the second surface (rough surface) has unevenness different from the unevenness of the first surface.

  The unevenness of the light control member on the first surface (surface far from the LED substrate) is such that the contour line is perpendicular to the direction of the LED element row (length direction of the substrate) It is composed of line segments (line segments B) that are obliquely connected to the line segments, and is a repetitive unevenness parallel to each other and having a height in a direction perpendicular to the contour lines, and striped undulations are formed. In particular, when the pair of line segments is symmetric with respect to a straight line (usually coincident with the center line of the width of the light control member) intersecting the surface of the LED element including the row of LED elements and the light control member, It is advantageous. The pair of line segments B may be connected to each other at one end and connected to the line segment A at the other end. It is also possible to omit line segments and use only two or more line segments.

  The angle formed by the extension of the line segment A and the line segment B is selected from the range of 10 degrees to 45 degrees, and preferably 15 degrees or more and 35 degrees or less. The line that includes the row of LED elements and intersects the surface perpendicular to the LED substrate and the light control member (usually the center line of the width of the light control member) may intersect the line segment A, and the center line and the line segment B intersect Also good. The line segments to be connected in the width direction of the light control member are line segment B-line segment A-line segment B, line segment A-line segment B-line segment A, line segment A-line segment B-line segment B -It may be any of the line segments.

  The repetitive undulation pitch is preferably less than 2 mm, particularly preferably less than 0.5 mm. The interval between the convex portions (or the concave portions) that repeat is not necessarily equal, but the equal interval is usually advantageous for manufacturing. The cross section perpendicular to the contour line of each convex part or concave part is arbitrary, and consists of, for example, an arc, a triangle lacking a side, a trapezoid lacking a base, and a sine waveform (others). You may have a narrow plane part between a convex part or a recessed part. The undulating recesses are effective even if they are shallower than the pitch.

  The light control member may have unevenness different from the first surface on the surface facing the LED substrate (second surface). The unevenness distributed two-dimensionally is advantageous, for example, satin. The pitch of irregularities on the textured surface and other rough surfaces is preferably less than 0.5 mm.

  The second surface may also have second repetitive irregularities having contour lines parallel to each other. For example, repeating parallel uneven contour lines consist of line segments obliquely intersecting a straight line perpendicular to the direction of the LED element row, and the projection and crossing of the uneven line contour line of the first surface (oblique) It may be something like The unevenness and pitch of the first surface may be different. The second surface may have another repeating unevenness having contour lines parallel to each other in addition to the above-described unevenness.

  It is desirable that the substance part of the light control member is made of a material having high transparency. It can be selected from polypropylene, polycarbonate, polystyrene, acrylic synthetic resin, glass and the like. The thickness of the light control member is usually about 0.2 mm to 2 mm.

  The undulations of the first surface of the light control member (the surface far from the LED substrate) are indispensable for hiding the light emission images of the individual LED elements. Only the rough surface of the second surface close to the LED substrate cannot hide the light emission image of the LED element without sacrificing illuminance.

  The straight tube lamp and the LED lamp of the present invention are one of the important features that use a bowl-shaped member whose main part is transparent. In order to obtain a wide illuminance distribution, a light emission image of an individual LED element can be seen. In order to avoid this, it is not necessary to use a translucent (emulsion etc.) bowl-shaped member. A main part means the area | region except the opening edge vicinity of the opening part of the side surface of a bowl-shaped member, ie, the part which faces light emission surfaces, such as a LED board.

  If the region in the vicinity of the opening end of the side surface opening of the bowl-shaped member is made light scattering, when the lamp is viewed from a shallow angle (a direction close to the surface of the substrate), there is a possibility that individual light emission images of the LED elements can be seen. Absent. This region may be opaque or light blocking. This region is set in a range from the opening end of the opening on the side surface to the height of extension of the second surface of the light control member. Even if it does not cover the entire range, the LED element from the lateral direction can be used even in the range from the vicinity of the opening end of the opening to the height of the extension of the second surface of the light control member or the vicinity thereof (for example, 2 mm below). What is necessary is to prevent the glare of the image.

  The material of the bowl-shaped member or the cover member is preferably a material having high transparency, and can be selected from polypropylene, polycarbonate, polystyrene, acrylic synthetic resin, and the like.

  The saddle-like or tubular cover member is provided with a pair of grooves extending in the longitudinal direction on the inner surface, and the light control member is supported in parallel to the surface of the substrate by inserting the side edges of the light control member into the grooves. You may make it do. This groove can be formed between a pair of protrusions parallel to each other on the inner surface of the bowl-shaped or tubular member.

  Since the distance between the LED elements constituting the row (between the centers; the same shall apply hereinafter) becomes narrower, the density of heat dissipation increases, and the temperature rises significantly during lighting. , 7 to 20 mm. For such LED element spacing, the distance between the first surface of the light control member and the LED element is preferably 5 to 10 mm, and the distance of 6 to 9 mm is most effective. Outside this range, the effect of concealing the light emission image of the individual LED elements becomes small, both large and small.

  The row of LED elements may be composed of white light emitting LED elements having different color temperatures, may be composed of white light emitting LED elements and colored light emitting LED elements, or two or more different colored light emitting LED elements.

  The support member usually also functions to dissipate heat generated from the LED element, and thus is composed of a good heat conductor such as metal. In order to avoid an increase in the weight of the entire lighting device, a lightweight metal material is preferable, and is selected from aluminum, an aluminum alloy, a magnesium alloy, and the like. Carbon fiber can also be used. A reinforcing member may be provided to maintain strength and rigidity. You may provide the outer surface with the pleat (claw) etc. extended in the arbitrary directions for assisting heat dissipation.

  In the straight tube type LED lamp of the present invention, a cover-like member that covers the front surface of the LED board widely is used a transparent bowl-shaped member. On the other hand, the LED board approaches the light emitting surface of the LED board in parallel with both sides. Since a transparent plate-like light control member having a predetermined rough surface is provided, the light emission images of the individual LED elements are not seen from the front of the lamp, and the illuminance higher than the conventional one can be obtained at the front of the lamp. Uniformity of illuminance within the required angle range can also be secured.

  The present invention is also useful for a straight tube lamp using a solid light emitting element other than an LED (in this case, “LED element” is referred to as “solid light emitting element” and “LED substrate” is referred to as “wiring board” in the preceding description. , "And" Furthermore, the light control member of the present invention can be widely applied to lighting devices using solid light emitting elements such as LEDs other than straight tube lamps.

  The perspective view of 1st embodiment of this invention   The disassembled perspective view of 1st embodiment of this invention.   Sectional drawing of 1st embodiment of this invention   Plan view of light control member (light diffusion plate) (first embodiment) (a) first surface, (b) second surface   Cross section of light control member (light diffusion plate)   Cross-sectional explanatory drawing showing the main light path (first embodiment)   Cross-sectional view of a bowl-shaped member (first embodiment)   The top view of the light control member in 2nd embodiment   Plan view of a light control member in the third embodiment   The top view of the light control member in a fourth embodiment   Cross-sectional explanatory drawing of a conventional typical straight tube type LED lamp   Cross-sectional explanatory drawing showing the path of light in a conventional straight tube type LED lamp   Sectional view of a conventional straight tube type LED lamp (Patent Document 1)

(First embodiment)
1 to 7 show a straight tube type LED lamp according to a first embodiment of the present invention. 1 is a perspective view of the entire lamp, FIG. 2 is an exploded perspective view, FIG. 3 is a cross-sectional view perpendicular to the axis, FIG. 4 is a plan view of a light control member (light diffusing plate), and FIG. Sectional drawing and FIG. 7 are sectional views of a bowl-shaped member (cover). FIG. 6 shows the main light paths. As shown in FIG. 1, the LED lamp 30 includes a main body including a cover 13, a support member 12 and others (not shown), and a pair of cap portions including a cap 15 and a power connection terminal 16. The cover 13 corresponds to the bowl-shaped member of the present invention. In order to avoid complexity, the inside of the cover 13 is not shown in FIG.

  As shown in FIG. 2, the LED lamp 30 includes an LED substrate 11, a support member 12, a cover 13, a light diffusion plate 14, and a pair of caps 15. The light diffusion plate 14 corresponds to the light control member of the present invention. The LED substrate 11 has a plurality of LED elements 11 a mounted on one surface thereof, and is fixed to the recess 12 a on the upper surface of the support member 12. The cover 13 is made of transparent polycarbonate, and is provided with convex portions 13a and 13b (see FIG. 3) on the inside. The light diffusing plate 14 has a repeating groove 14d on its upper surface. Details of the light diffusion plate 14 are shown in FIGS. As shown in FIG. 1, each of the caps 15 is provided with a power connection terminal 16 and is fixed to both ends of the support member 12 with screws 15a using grooves 12d (see FIG. 3) between the reinforcing members 12c. ing.

  FIG. 3 shows details of the cross section of the lamp body. On the inner side of the cover 13, convex portions 13a and 13b are provided in parallel with the length direction, and a groove 13c is formed between them. The light diffusing plate 14 is fixed inside the cover 13 by inserting the light diffusing plate 14 into the pair of grooves 13c. On the other hand, the cover 13 is fixed to the support member 12 by inserting the bent portion 13 d of the edge into the groove 12 b of the edge of the support member 12. A light diffusion layer 13e is provided inside the cover 13 between the convex portion 13b and the bent portion 13d (reference numerals are omitted in FIG. 2).

  The support member 12 has a flat tubular shape, and has a pair of reinforcing members 12c provided in parallel in the length direction on the inner side, and a groove 12d is formed therebetween. Screws 15a for fixing the cap 15 are inserted into both ends of the groove 12d (see FIG. 2). The outer surface of the support member 12 is provided with pleats 12e extending in the axial direction for heat dissipation.

  4A shows the upper surface 14a of the light diffusing plate 14, and FIG. 4B shows the lower surface 14b. FIG. 5 shows a cross section of the light diffusing plate 14 taken along the line segment X1-X2 in FIG. 3 (or the line segment 14M in FIG. 4A). The upper surface 14a (the side far from the LED substrate) has repeating grooves 14d that are parallel to each other. The central portion of the groove 14d is perpendicular to the central line 14M (parallel to the row of LED elements 11a) of the light diffusing plate 14, and the vicinity of both ends is oblique. The bisected portions of the groove 14d are symmetric with respect to the center line 14M. The center line 14M is included in a plane that includes the row of LED elements and is perpendicular to the LED substrate, and corresponds to a line where the plane and the light diffusion plate 14 intersect. The lower surface 14b (LED substrate side) is a satin-like rough surface.

  FIG. 7 shows details of the cross section (perpendicular to the axis) of the cover 13. Since description about FIG. 3 can be used, description is abbreviate | omitted.

(Operation of the first embodiment)
The LED element 11a emits light by electric power supplied from the power supply connection terminal 16 via a wiring (not shown) and a power supply control circuit. Part of the light emitted from the LED element 11a passes through the light diffusing plate 14 and travels in a straight line or a direction close to straight travel, and further passes through the transparent cover 13 (saddle-shaped member) to be used as illumination light outside the tube. To be released. Since these light beams are hardly scattered by the cover 13, the attenuation is extremely small. A part of the light is diffused by refraction on the rough surface of the lower surface 14 b of the light diffusing plate 14 and then travels into the light diffusing plate 14. When the diffused light that has passed through the inside of the light diffusing plate 14 reaches the upper surface 14 a, it is scattered mainly in the axial direction of the lamp by the action of the grooves 14 d and diffuses into the space inside the cover 13. A part of the light will be reflected from the upper surface 14a toward the inside of the light diffusion plate 14 and will reach the lower surface 14b again. Light that travels laterally along the surface within the light diffuser 14 will be repeatedly reflected at each surface. It seems that the behavior of diffused light into the light diffusion plate 14 is extremely complicated. A part of the light that reaches the lower surface 14b of the light diffusion plate 14 from the LED element 11a is reflected, travels toward the LED substrate 11 again, and is reflected there.

  FIG. 6 shows the main light flux paths in a cross section (corresponding to FIG. 3) perpendicular to the length direction of the lamp 30. Of the light emitted from the LED element 11a, the light beam traveling straight through the light diffusing plate 14 and the cover 13 (saddle-shaped member) is scattered by refraction at B0 and B2 and the rough surface of the lower surface 14b of the light diffusing plate 14, and the light. B1 and B3 indicate light beams that pass through the diffuser plate 14 and further pass through the transparent cover 13 (the bowl-shaped member) and go straight. B2 and B3 are straight and scattered light beams derived from the light beam emitted from the LED element 11a in a slightly oblique direction, respectively. The light beams B1 and B3 are only slightly scattered in the plane of FIG. 6 by the upper surface 14a of the light diffusion plate 14. These luminous fluxes, namely B0, B1, B2 and B3, will form illumination light in front of the lamp 30. Even if it is assumed (after the invention) that this is the reason why uniform and high illuminance is obtained over a wide range of angles, it is probably not unreasonable.

(Effects of the first embodiment)
A light diffusing plate having specific irregularities on the upper surface 14a and the lower surface 14b at a position close to the light emitting surface of the LED substrate 11 and in parallel therewith as a cover 13 covering the front surface of the LED substrate 11 By providing 14, the light emission image of the individual LED element 11a cannot be seen from the front of the lamp, and the illuminance higher than that of the conventional structure can be obtained in front of the lamp. Uniformity of illuminance within the required angle range can also be secured. Further, since the light diffusion layer 13e is provided in a specific portion inside the cover 13, the light traveling in the oblique direction between the LED substrate 11 and the light diffusion plate 14 is scattered by the light diffusion layer 13e, and the LED is also emitted from the side of the lamp. The light emission image of the element 11a is not visible.

(Second embodiment)
The upper surface 14a of the light diffusion plate 14 used in the first embodiment is a surface having a groove 14e having the shape shown in FIG. The bisected portions of the groove 14e are symmetric with respect to the center line 14M of the light diffusing plate 14, the vicinity of each end is perpendicular to the center line 14M (the length direction of the light diffusing plate 14), and the central portions are mutually Inclined in the opposite direction. Other than that, it is the same as the first embodiment. The second embodiment has the same effect as the first embodiment.

(Third embodiment)
The upper surface 14a of the light diffusing plate 14 is a surface having a groove 14f having the shape shown in FIG. 9, and the other portions are the same as those in the first embodiment. The vicinity of both ends of the groove 14f is perpendicular to the center line 14M, and the center portion is inclined. The effect of the third embodiment is the same as that of the second embodiment.

(Fourth embodiment)
The upper surface 14a of the light diffusing plate 14 is a surface having a groove 14j having a shape (wedge shape) shown in FIG. 10, and the other portions are the same as those in the first embodiment. The grooves 14j are inclined in opposite directions with respect to the center line 14M, one half on each side. The effect of the fourth embodiment is the same as that of the second embodiment.

  In the third embodiment, an LED lamp 30 was manufactured using a bowl-shaped member made of transparent polycarbonate (PK) having a thickness of 0.8 mm and having a cross-sectional radius of 26 mm as the cover 13. The substance of the light diffusing plate 14 is made of transparent PK having a thickness of 0.8 mm, and grooves 14f arranged in parallel are cut on the entire upper surface 14a to form undulations. Both the groove width and pitch were set to 0.4 mm. The depth is about 0.3 mm. The lower surface 14b is a satin surface having irregular irregularities. The light diffusing plate 14 was disposed at a distance of 6 mm (up to the surface 14b) from the light emitting surface of the LED element 11a. The LED substrate 11 is an LED element 11a in which 130 white light-emitting LED elements with a power consumption of 0.4 W are arranged on a straight line at an interval of about 8.5 mm (between the centers). The light diffusing layer 13e has a light diffusibility such that a light emission image of the LED element cannot be seen.

(Comparative example)
For comparison, a translucent bowl-shaped member (corresponding to 93 in FIG. 11) of the same material (PK), the same thickness, and the same shape but provided with a milky light diffusion layer in close contact with the inside instead of the cover 13 ), The light diffusion plate 14 was omitted, and a straight tube LED lamp (90A) was manufactured. Other than that, it was the same as the LED lamp 30. The milky white light diffusing layer is used for a commercially available straight tube LED lamp, and has a diffusibility that slightly exceeds the minimum level at which an image of the LED element cannot be recognized.

  In both the LED lamp 30 of the example and the LED lamp 90A of the comparative example, the light emission image of the LED element was not visually recognized. The illuminance on the surface of the LED lamp 30 at a distance of 100 cm was 530 lux. On the other hand, the illuminance obtained by the lamp 90A of the comparative example at the same position was 460 lux. That is, the illuminance obtained by the inventive example was about 16% higher than that of the comparative example.

11 LED board 11a LED element 12 Support member 12a Recess 12b Groove 12c Reinforcing material 12d Groove 12e Fold
13 Cover (saddle-shaped member)
13a, 13b Protruding portion 13c Groove 13d Bending portion 13e Light diffusing layer 14 Light diffusing plate 14a Upper surface 14b Lower surface 14d Grooves 14e, 14f, 14j Groove 14M Center line (of light diffusing plate)
15 Cap 15a Screw 16 Power connection terminal 30 LED lamp 90 LED lamp 91 LED board 91a LED element 92 Support member 92a Slit 93 Gutter-shaped members B0, B1, B2, B3 Light flux L0, L1 Light flux 103 Case 121 Support body 122 Substrate 126 Solid light emitting elements 131a, 131b, 132a, 132b

Claims (28)

A wiring board having a row of solid state light emitting elements mounted on one side;
A light control member made of a transparent flat plate, disposed away from the surface of the wiring board and parallel to the surface,
The light control member has a repetitive unevenness having contour lines parallel to each other on a first surface far from the wiring board, and the contour line of the unevenness is a line segment perpendicular to the column direction of the solid state light emitting elements. A lighting device comprising a line segment obliquely connected to the line segment, wherein the second surface facing the wiring board is a rough surface.   2. The illumination device according to claim 1, wherein the pair of diagonally connected line segments are symmetrical with respect to a straight line intersecting a plane perpendicular to the wiring board including the row of the solid state light emitting elements and the light control member.   The lighting device according to claim 2, wherein the pair of diagonally connected line segments are connected to each other at one end and connected to the vertical line segment at the other end.   The lighting device according to claim 1, wherein the rough surface of the second surface has unevenness different from the unevenness of the first surface.   The lighting device according to claim 1, wherein the solid-state light emitting element is an LED element.   The distance (between the centers) of the solid state light emitting elements constituting the row is 7 to 20 mm, and the distance between the first surface of the light control member and the solid state light emitting element is 5 to 10 mm. Lighting equipment. An elongated wiring board with a row of solid state light emitting elements mounted on one side;
An optically transparent, at least part of a cross section perpendicular to the axial direction is formed of a bowl-shaped or tubular cover member made of an arc,
The wiring board and the cover member are arranged such that respective longitudinal axes are parallel to each other,
In the lighting device arranged so that the cover member remotely covers the surface of the wiring board,
The cover member is transparent except for a predetermined area,
A light control member made of a transparent flat plate disposed in a space surrounded by the cover member in parallel with the surface of the wiring board;
The light control member has a repetitive unevenness having contour lines parallel to each other on a first surface far from the wiring board, and the contour line of the unevenness is a line segment perpendicular to the column direction of the solid state light emitting elements. A lighting device comprising: a line segment obliquely connected to the line segment, wherein the second surface facing the wiring board is a rough surface.   The lighting device according to claim 7, wherein the pair of diagonally connected line segments are symmetric with respect to a straight line intersecting a plane perpendicular to the wiring board including the row of the solid state light emitting elements and the light control member.   The lighting device according to claim 8, wherein the pair of diagonally connected line segments are connected to each other at one end and connected to the vertical line segment at the other end.   The lighting device according to claim 7 or 8, wherein the second surface has irregularities different from the irregularities of the first surface.   The lighting device according to claim 10, wherein the second surface is made of unevenness distributed two-dimensionally.   The lighting device according to claim 7, wherein the light control member is supported by a groove provided on an inner surface of the cover member.   The lighting device according to claim 7, wherein the solid-state light emitting element is an LED element. An elongated wiring board with a row of solid state light emitting elements mounted on one side;
It consists of an elongated support member that supports this wiring board and a light-transmitting hook-shaped member,
The wiring board, the support member, and the bowl-shaped member are arranged such that respective longitudinal axes are parallel to each other,
The hook-shaped member is disposed so as to remotely cover the surface of the wiring board and the opening extending in the axial direction is closed by the support member,
In the straight tube lamp, the wiring board is supported by the support member so that the surface faces the bowl-shaped member,
The bowl-shaped member is transparent except for a predetermined region near the opening,
A light control member made of a transparent flat plate disposed in a space surrounded by the bowl-shaped member in parallel with the surface of the wiring board;
The light control member has repeated irregularities having contour lines parallel to each other on a first surface far from the wiring board, and the contour line is a line segment perpendicular to the column direction of the solid-state light emitting elements, and the line And the second surface facing the wiring board is a rough surface.
The predetermined area is in a range from the opening end of the opening to the extension of the second surface of the light control member, and has a light scattering property.   15. The straight tube lamp according to claim 14, wherein the pair of diagonally connected line segments are symmetrical with respect to a straight line intersecting a plane perpendicular to the wiring board including the solid light emitting element rows and the light control member.   The straight tube lamp according to claim 14 or 15, wherein the rough surface of the second surface is composed of unevenness distributed two-dimensionally.   The straight tube type lamp according to claim 16, wherein the solid state light emitting device is an LED device.   The distance (between the centers) of the solid state light emitting elements constituting the row is 7 to 20 mm, and the distance between the first surface of the light control member and the solid state light emitting element is 5 to 10 mm. Straight tube lamp. An elongated LED substrate with a row of LED elements mounted on one side;
An elongated support member for supporting the LED substrate;
It is light-transmitting and consists of a bowl-shaped member whose cross section perpendicular to the axial direction is an arc,
The LED substrate, the support member, and the bowl-shaped member are arranged such that respective longitudinal axes are parallel to each other,
The hook-shaped member is disposed so as to remotely cover the surface of the LED substrate, and an axially extending opening is closed by the support member,
In the straight tube type LED lamp supported by the support member such that the LED substrate faces the bowl-shaped member,
The bowl-shaped member is transparent except for a predetermined region,
In a space surrounded by the bowl-shaped member, provided with a light control member made of a transparent flat plate arranged in parallel to the surface of the LED substrate,
The light control member has repeating irregularities having contour lines parallel to each other on a first surface far from the LED substrate, and the contour line includes a line segment perpendicular to the row direction of the LED elements, and the line segment. Consists of line segments connected diagonally to
The straight tube type LED lamp, wherein the second surface of the light control member facing the LED substrate is a rough surface.   The straight tube type LED lamp according to claim 19, wherein the pair of diagonally connected line segments are symmetrical with respect to a straight line intersecting a plane perpendicular to the LED substrate including the row of LED elements and the light control member.   21. The straight tube type LED lamp according to claim 20, wherein the pair of diagonally connected line segments are connected to each other at one end and connected to the vertical line segment at the other end.   The straight tube type LED lamp according to any one of claims 19 to 21, wherein the rough surface of the second surface is composed of unevenness distributed two-dimensionally.   23. The straight tube according to claim 22, wherein an interval (between the centers) of the LED elements constituting the row is 7 to 20 mm, and a distance between the first surface of the light control member and the LED elements is 5 to 10 mm. Type LED lamp.   23. The straight tube type LED lamp according to claim 22, wherein the predetermined region is in the vicinity of the opening end of the opening of the bowl-shaped member and has light scattering properties.   The straight tube type LED lamp according to claim 24, wherein the region is in a range from the opening end to an extension of the second surface of the light control member.   The straight tube type LED lamp according to claim 22, wherein the row of LED elements is composed of white light emitting LED elements having different color temperatures, white light emitting LED elements and colored light emitting LED elements, or two or more different colored light emitting LED elements. An elongated wiring board with a row of solid state light emitting elements mounted on one side;
An optically transparent, at least part of a cross section perpendicular to the axial direction is formed of a bowl-shaped or tubular cover member made of an arc,
The wiring board and the cover member are arranged such that respective longitudinal axes are parallel to each other,
In the lighting device arranged so that the cover member remotely covers the surface of the wiring board,
The cover member is transparent except for a predetermined area,
A light control member made of a transparent flat plate disposed in a space surrounded by the cover member in parallel with the surface of the wiring board;
The light control member has a repetitive unevenness having contour lines parallel to each other on a first surface far from the wiring board, and the contour line of the unevenness is from a line segment that obliquely intersects the direction of the row of the solid state light emitting elements. And the second surface facing the wiring board is a rough surface.   28. The lighting device according to claim 27, wherein the pair of line segments are symmetrical with respect to a straight line intersecting a plane perpendicular to the wiring board including the row of LED elements and the light control member.

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