JP4724238B2 - Lighting device - Google Patents

Description

  The present invention relates to a lighting device that illuminates wall surfaces, side surfaces, and the like by three-dimensionally arranging a plurality of light guide plates for double-sided light emission in a small amount and a variety.

  2. Description of the Related Art Conventionally, in a lighting device using LED light as a light source, in particular, a light bulb lamp type has a configuration in which, for example, a large number of white LEDs are three-dimensionally provided in order to obtain a three-dimensional light distribution characteristic (see, for example, Patent Document 1). .)

JP 2005-310561 A

  However, the above-described configuration has a problem that it is difficult to correspond to lighting devices having various shapes in the manufacturing process, and the manufacturing cost is high.

  In view of the above technical problems, the present invention has a light distribution characteristic tailored to the shape of the facility to which the lighting device is mounted and the user's request, and suppresses the difference in light brightness and the angle for irradiation. An object of the present invention is to provide an illuminating device that illuminates a floor surface or a side surface of an indoor facility or the like that can be manufactured at a lower cost without depending on it.

In order to attain the above object, the lighting apparatus of the present invention includes a plurality of light guide plate reflective dots for leading out light as diffused light transparent formed on the principal surface perpendicular to the side which is incident from the side surface, said plurality An LED light source that is provided along the side surface of the plurality of light guide plates and allows LED light to enter from the side surfaces of the plurality of light guide plates ; and a holding member that holds the LED light sources, and the plurality of light guide plates includes one The main surface of the light guide plate is joined to the side surface of the other light guide plate and a surface orthogonal to the main surface at a predetermined angle.

  According to the lighting device according to the present invention, it has a light distribution characteristic that matches the shape of the facility to which the lighting device is mounted and the user's request, does not depend on the angle of irradiation while suppressing the difference between light and dark, Further, it can be manufactured at low cost.

It is a schematic diagram which shows the light-guide plate arrange | positioned at the illuminating device of the 1st Embodiment of this invention, (a) is a schematic diagram which shows the surface part of a light-guide plate, (b) shows the side part of a light-guide plate. A schematic diagram and (c) are schematic diagrams which show the back surface part of a light-guide plate. It is a schematic diagram which shows a part of surface part of the light-guide plate arrange | positioned at the illuminating device of the 1st Embodiment of this invention. It is a schematic diagram which shows the processing tool for embossing which forms the concave pattern trace provided in the light-guide plate arrange | positioned at the illuminating device of the 1st Embodiment of this invention, (a) is a support part of a processing tool (B) is a schematic diagram showing an ultrasonic processing portion of the processing tool, It is a perspective view which shows the ultrasonic processing apparatus for embossing which forms the concave pattern trace provided in the light-guide plate arrange | positioned at the illuminating device of the 1st Embodiment of this invention. It is a schematic diagram which shows the state of the embossing which forms the concave pattern trace provided in the light-guide plate arrange | positioned at the illuminating device of the 1st Embodiment of this invention, (a) thru | or (e) are embossing. It is a schematic diagram which shows the state which measures the process start reference height of a process member before performing, and performs embossing with respect to a process member next according to this process start reference height. It is a schematic diagram which shows the side part of the light-guide plate arrange | positioned at the illuminating device of the 1st Embodiment of this invention, (a) shows the side part of a light-guide plate in case a processing member does not have a curve and a thickness spot. (B) is a schematic diagram which shows the side part of a light-guide plate in case a process member has a curve and a thickness spot. It is a schematic diagram which shows the side part of a light-guide plate in case the curvature or thickness spot exists in a process member in manufacture of the conventional light-guide plate. The model shown in the state which permeate | transmitted the surface part concave pattern trace formed in the surface part of the light-guide plate arrange | positioned in the illuminating device of the 1st Embodiment of this invention, and the back part concave pattern trace formed in the back surface part. It is a figure, and (a) is a mimetic diagram showing the state where the back part concave pattern trace is formed in the same face to the front part concave pattern trace, and (b) is the back part concave with respect to the front part concave pattern trace. Schematic diagram showing a state in which the pattern marks are formed with a half pitch eccentricity in the X direction, (c) is a state in which the back surface concave pattern marks are formed with a half pitch eccentricity in the Y direction with respect to the front surface concave pattern marks. (D) is a schematic diagram showing a state where the back surface concave pattern trace is formed with a half-pitch eccentricity in both the X and Y directions with respect to the front surface concave pattern trace. It is a schematic diagram which shows the side part of the light-guide plate which varied the depth of the surface part concave pattern trace arrange | positioned in the illuminating device of the 1st Embodiment of this invention, and a back surface concave pattern trace, respectively. A light guide plate having different depths of the front surface concave pattern trace and the back surface concave pattern trace disposed in the lighting device of the first embodiment of the present invention, and a side surface portion of a reflective tape bonded to the light guide plate It is a schematic diagram which shows. It is a side view which shows the illuminating device of the 1st Embodiment of this invention. It is a top view which shows the illuminating device of the 1st Embodiment of this invention.

  DESCRIPTION OF EXEMPLARY EMBODIMENTS Hereinafter, preferred embodiments according to a lighting device of the invention will be described with reference to the drawings. In addition, the illuminating device of this invention is not limited to the following description, In the range which does not deviate from the summary of this invention, it can change suitably.

[First Embodiment]
First, the structure of the light guide plate disposed in the lighting device according to the present invention will be described, then the light guide plate processing tool and processing device, and the light guide plate manufacturing method using the processing device will be described. The optical specifications and the like of the light plate will be described, then the structure of the light guide plate and the LED unit constituting the lighting device will be described, and finally the lighting device according to the present invention will be described.

  First, the configuration of the light guide plate 10 disposed in the lighting device according to the present invention will be described with reference to FIGS. 1 and 2.

  1 is a schematic diagram showing the light guide plate 10 disposed in the lighting device. FIG. 1A is a front surface portion 10A of the light guide plate 10, and FIG. 1B is a side view of the light guide plate 10. Similarly to FIG. 1C, the part 10 </ b> C is a schematic diagram showing the back surface part 10 </ b> D of the light guide plate 10. FIG. 2 is an enlarged schematic view showing a part of the surface portion 10A of the light guide plate 10 disposed in the lighting device.

  The light guide plate 10 is composed of a plate-shaped portion having a predetermined size and having a plurality of concave pattern marks formed of, for example, a methacrylic resin (Polymethylmethacrylate) plate. Specifically, the size of the plate-like portion is, for example, a rectangular shape of 100 mm × 100 mm to 1450 mm × 1030 mm corresponding to the B0 plate size, and corresponds to a thickness of 4 mm to 12 mm. Here, as shown in FIG. 1, a front surface concave pattern mark 10 </ b> B is formed on the front surface part 10 </ b> A of the light guide plate 10, and a back surface concave pattern mark 10 </ b> E is formed on the back surface part 10 </ b> D of the light guide plate 10. The concave pattern trace is formed from a square pyramid-shaped trace having a major axis of 0.6 mm and a depth of 0.4 mm, for example, as a pitch pattern, for example, 1.2, 1.5, 2.0, and 8.0 mm pitch. It is formed with a matrix-shaped molding mark composed of the like.

  Next, a processing tool and a processing apparatus for the light guide plate 10 disposed in the lighting device will be described. Specifically, the processing tool 20 and the ultrasonic processing apparatus 30 that form the concave pattern marks provided on the light guide plate 10 will be described with reference to FIGS. 3 and 4.

  FIG. 3 is a schematic diagram showing a processing tool 20 for embossing that forms a concave pattern mark provided on the light guide plate 10 provided in the lighting device, and FIG. 3B is a schematic diagram showing the ultrasonic processing portion 20A of the processing tool 20, and FIG. 4 is a concave pattern mark provided on the light guide plate 10 provided in the illumination device. It is a perspective view which shows the ultrasonic processing apparatus 30 for embossing which forms.

  The processing tool 20 is an ultrasonic processing horn, and supports the ultrasonic processing unit 20A in which processing dots are arranged in a matrix on the rectangular front end surface of the ultrasonic processing horn, and the ultrasonic processing unit 20A. It is comprised from the support part 20B. In the ultrasonic processing section 20A, each processing dot is formed in a quadrangular pyramid shape. FIG. 2B shows an ultrasonic processing unit 20A in which processing dots are arranged in a matrix of 4 rows and 4 columns as an example.

  The ultrasonic processing apparatus 30 includes a machine base 31, a work table 32, a moving mechanism 33, a vacuum pump 34, an ultrasonic oscillator 35, and the like. As the ultrasonic machining apparatus 30, for example, an ultrasonic machining apparatus that has been filed for a utility model registration by the same applicant as the present invention and has been registered as registration No. 3140292 can be used. By attaching the support portion 20B of the processing tool 20 to such an ultrasonic processing device 30 and applying ultrasonic vibration to the ultrasonic processing portion 20A of the processing tool 20, the front surface or the back surface of the processing member 5, or The light guide plate 10 is manufactured by forming concave pattern marks on both sides.

  Specifically, in the ultrasonic processing apparatus 30, the ultrasonic processing unit 20 </ b> A of the processing tool 20 is pressed against one main surface of the processing member 5, thereby providing the ultrasonic processing unit 20 </ b> A on one main surface of the processing member 5. Reflective dots reflecting the processed dots are formed. In addition, the reflective dot is formed in the predetermined range of one main surface of the processing member 5 by moving the processing tool 20 relative to the processing member 5 and repeating the formation of the reflective dots. Further, at least one direction of the extending direction of the quadrangular pyramid ridge line of the processing dots is substantially parallel to the incident direction of the light incident from the side surface of the light guide plate 10 formed by processing the processing member 5. Similarly, the ultrasonic processing portion 20 </ b> A of the processing tool 20 is pressed against one main surface of the processing member 5. Note that a more specific method for forming the concave pattern trace in consideration of the shape error of the processed member 5 will be described later with reference to FIG.

  Next, the manufacturing method of the light-guide plate 10 arrange | positioned at the illuminating device is demonstrated. Specifically, the formation of the concave pattern marks provided on the light guide plate 10 in consideration of the shape error of the processed member 5 will be specifically described with reference to FIG.

  FIG. 5 is a schematic view showing an embossing state in which a concave pattern mark provided on the light guide plate 10 provided in the lighting device is formed, and FIGS. 5A to 5E further illustrate the embossing. It is a schematic diagram which shows the state which measures the process start reference | standard height of the process member 5 before performing, and performs embossing with respect to the process member 5 according to this process start reference | standard height next.

  As shown in FIG. 5 (a), the processing start reference height H 1 of the surface of the processing member 5 is set to the movable probe D disposed in a measurement unit (not shown) of the ultrasonic processing apparatus 30. Detect by contacting the surface. For the processed member 5, for example, a transparent methacrylic resin plate having a predetermined shape is used. The probe D is not limited to a mechanical configuration. For example, the probe D emits measurement light from a measurement unit (not shown) of the ultrasonic processing apparatus 30 and receives reflected light from the surface of the processing member 5. It is good also as a structure.

  Similarly, as shown in FIG. 5B, after the processing tool 20 mounted on the ultrasonic processing apparatus 30 is moved to a position above the surface portion 10A where the processing start reference height H1 is detected, With reference to the processing start reference height H1, ultrasonic vibration is applied to the ultrasonic processing portion 20A provided at the tip of the processing tool 20, and ultrasonic processing is performed from the processing start reference height H1 of the surface portion 10A to a predetermined depth. Lower part 20A. Further, the processing start reference height H2 of the surface of the processing member 5 which is the next ultrasonic processing location is detected by the movable probe D disposed in the measurement unit of the ultrasonic processing apparatus 30.

  Similarly, as shown in FIG. 5C, after moving the processing tool 20 mounted on the ultrasonic processing apparatus 30 to a position above the surface portion 10A where the processing start reference height H2 is detected, Using the processing start reference height H2 as a reference, ultrasonic vibration is applied to the ultrasonic processing portion 20A provided at the tip of the processing tool 20, and ultrasonic processing is performed from the processing start reference height H2 of the surface portion 10A to a predetermined depth. Lower part 20A. Further, the machining start reference height H3 of the surface of the machining member 5 which is the next ultrasonic machining location is detected by the movable probe D disposed in the measurement unit of the ultrasonic machining apparatus 30.

  Similarly, as shown in FIG. 5D, after moving the processing tool 20 mounted on the ultrasonic processing apparatus 30 to a position above the surface portion 10A where the processing start reference height H3 is detected, Using the processing start reference height H3 as a reference, ultrasonic vibration is applied to the ultrasonic processing portion 20A provided at the tip of the processing tool 20, and ultrasonic processing is performed from the processing start reference height H3 of the surface portion 10A to a predetermined depth. Lower part 20A. Further, the machining start reference height H4 of the surface of the machining member 5 which is the next ultrasonic machining location is detected by the movable probe D disposed in the measurement unit of the ultrasonic machining apparatus 30.

  Further, as shown in FIG. 5E, the processing tool 20 mounted on the ultrasonic processing apparatus 30 is moved to a position above the surface portion 10A where the processing start reference height H4 is detected, and then the processing is performed. With reference to the start reference height H4, ultrasonic vibration is applied to the ultrasonic processing unit 20A provided at the tip of the processing tool 20, and the ultrasonic processing unit from the processing start reference height H4 of the surface portion 10A to a predetermined depth. Lower 20A.

  Next, the effect of the method for forming the concave pattern marks provided on the light guide plate 10 provided in the above-described lighting device will be specifically described with reference to FIGS. 6 and 7.

  FIG. 6 is a schematic diagram showing the side surface portion 10C of the light guide plate 10 disposed in the lighting device. Further, FIG. 6A shows the side surface of the light guide plate 10 when the processed member 5 has no curvature or uneven thickness. Similarly, FIG. 6B is a schematic diagram illustrating the side surface portion 10C of the light guide plate 10 when the processed member 5 has a curve or a thickness unevenness. FIG. 7 is a schematic view showing the side surface portion 40A of the light guide plate 40 when the processed member 5 has a curve or thickness unevenness in the manufacture of the conventional light guide plate 40.

  As shown in FIG. 6A, when the processed member 5 has no curvature or unevenness in thickness, the surface portion 10A of the light guide plate 10 can be detected without detecting the processing start reference height of the surface portion 10A for each processing. Regardless of the position, the surface portion concave pattern mark 10B having a constant depth can be formed with respect to the surface portion 10A. Similarly, the back surface concave pattern mark 10E having a certain depth can be formed on the back surface portion 10D regardless of the position of the back surface portion 10D of the light guide plate 10.

  However, as shown in FIG. 6 (b), when the processed member 5 has a curve or thickness unevenness, if the processing start reference height of the surface portion 10A is not detected for each processing, the surface portion 10A is not detected. The surface portion concave pattern mark 10B having a certain depth cannot be formed. Similarly, unless the processing start reference height of the back surface portion 10D is detected for each processing, the back surface concave pattern mark 10E having a certain depth cannot be formed on the back surface portion 10D.

  Here, the processing member 5 that becomes the substrate for the light guide plate 10 is, for example, a resin plate, specifically, a methacrylic resin plate or the like. Since the methacrylic resin plate is manufactured by an extrusion manufacturing method, the individual difference in the thickness of the methacrylic resin plate is about ± 1 mm when the standard value is 8 mm. Further, even in a single methacrylic resin plate, the thickness unevenness is large. Specifically, the difference between the maximum thickness and the minimum thickness is about 0.4 mm. In addition, a methacrylic resin board may deform | transform so that it may warp by absorbing a water | moisture content. As described above, the methacrylic resin plate has a large error in the thickness component due to individual differences in thickness, thickness unevenness, warping, and the like. On the other hand, the depth of the front surface concave pattern mark 10B formed on the front surface part 10A of the light guide plate 10 and the depth of the back surface concave pattern mark 10E formed on the back surface part 10D of the light guide plate 10 are 0.3 mm to 0 respectively. Often set to 5 mm.

  Therefore, in the processing of the methacrylic resin plate of the processing member 5 serving as the substrate for the light guide plate 10, the processing start reference height is detected after being detected by the movable probe D attached to the measurement unit of the ultrasonic processing apparatus 30. As a reference, it is essential to lower the ultrasonic processing unit 20A from the surface of the methacrylic resin plate to a predetermined depth while applying ultrasonic vibration to the ultrasonic processing unit 20A provided at the tip of the processing tool 20. It is.

  When the processing start reference height of the surface of the methacrylic resin plate is not detected, the surface portion concave pattern trace having a certain depth in the surface portion 40A of the light guide plate 40 as in the conventional light guide plate 40 shown in FIG. 40B cannot be formed. Similarly, the back surface concave pattern mark 40E having a certain depth cannot be formed on the back surface portion 40D of the light guide plate 40.

  Next, the optical specification of the light guide plate 10 disposed in the illumination device will be described. Specifically, the optical specifications relating to the concave pattern marks formed on both surfaces of the light guide plate 10 will be specifically described with reference to FIG.

  8 shows a front surface concave pattern mark 10B formed at a pitch P1 on the front surface part 10A of the light guide plate 10 disposed in the lighting device, and a back surface concave pattern mark 10E formed at a pitch P1 on the back surface part 10D. FIG. 8A is a state in which the back surface concave pattern mark 10E is formed so as to face the same with respect to the front surface concave pattern mark 10B. Similarly, FIG. ) Is a state in which the back surface concave pattern mark 10E is formed eccentrically by a half pitch P2 in the X direction with respect to the front surface concave pattern mark 10B. Similarly, FIG. FIG. 8 (d) shows a state in which the concave pattern trace 10E is formed with a half pitch P2 eccentricity in the Y direction. Similarly, in FIG. 8D, the rear concave pattern trace 10E is half in the X and Y directions with respect to the front concave pattern trace 10B. Pitch P2 eccentric It shows the state of being formed Te.

  Here, LED light is irradiated to the front surface concave pattern mark 10B formed on the front surface part 10A of the light guide plate and the back surface concave pattern mark 10E formed on the back surface part 10D, respectively. Specifically, in each of FIGS. 8A to 8D, the incident light L1 of LED light is irradiated from the horizontal direction X of FIG. Similarly, in each of FIGS. 8A to 8D, the incident light L2 of LED light is irradiated from the vertical direction Y of FIG. Hereinafter, with respect to the optical characteristics related to the specification of the concave pattern mark, the condition that the front surface concave pattern mark 10B and the back surface concave pattern mark 10E shown in FIG. Optical characteristics under three conditions in which the back surface concave pattern mark 10E is decentered by a half pitch P2 with respect to the front surface concave pattern mark 10B shown in FIGS.

  First, as shown in FIG. 8B, the optical characteristics under the condition that the back surface concave pattern mark 10E is formed by decentering by a half pitch P2 in the X direction with respect to the front surface concave pattern mark 10B. ) And explain. Under this condition, the density at which the concave pattern marks formed on the light guide plate 10 in the X direction visible from the surface portion 10A side of the light guide plate 10 can be seen is twice that in the case of FIG. . For this reason, compared with the case of FIG. 8A, the bright spot due to the concave pattern trace visible from the surface portion 10A side of the light guide plate 10 is doubled in the X direction, so the difference in light brightness is small. Further, the density of the concave pattern marks formed in the light guide plate 10 in the Y direction that can be visually recognized from the surface portion 10A side of the light guide plate 10 is the same as in the case of FIG. For this reason, compared with the case of Fig.8 (a), the difference of the brightness of light is the same in the Y direction.

  Further, as shown in FIG. 8C, the optical characteristics under the condition that the back surface concave pattern mark 10E is formed by decentering by a half pitch P2 in the Y direction with respect to the front surface concave pattern mark 10B. ) And explain. Under this condition, the density of the concave pattern marks formed on the light guide plate 10 in the Y direction visible from the surface portion 10A side of the light guide plate 10 is twice that in the case of FIG. For this reason, compared with the case of FIG. 8A, since the diffused light by the concave pattern trace visually recognizable from the surface portion 10A side of the light guide plate 10 is doubled in the Y direction, the difference in light brightness is reduced. Further, the density of the concave pattern marks formed on the light guide plate 10 in the X direction visible from the surface portion 10A side of the light guide plate 10 is the same as in the case of FIG. For this reason, compared with the case of Fig.8 (a), the difference of the brightness of light is the same in the X direction.

  Similarly, as shown in FIG. 8D, the optical characteristics under the condition that the back surface concave pattern mark 10E is formed with the half pitch P2 decentered in the X and Y directions with respect to the front surface concave pattern mark 10B. This will be described in comparison with 8 (a). Under these conditions, the density of the concave pattern marks formed on the light guide plate 10 in the X and Y directions visible from the surface portion 10A side of the light guide plate 10 is twice as high as that in the case of FIG. is there. For this reason, compared with the case of FIG. 8A, the diffused light due to the concave pattern traces visible from the surface portion 10A side of the light guide plate 10 is doubled in both the X and Y directions, so the difference in light brightness is different. Get smaller.

  As described above with reference to FIGS. 8A to 8D, by forming the position of the back surface concave pattern mark 10E with respect to the front surface concave pattern mark 10B eccentrically in the X and Y directions, the optical characteristics can be improved. Can be arbitrarily selected. In particular, in the condition shown in FIG. 8D, since the difference in light brightness in the X and Y directions is smaller than in the condition shown in FIG. can get.

  Here, the configuration of the light guide plate 50, which is an application of the configuration of the light guide plate 10 disposed in the illumination device, will be described with reference to FIG. FIG. 9 is a schematic diagram showing the side surface portion 50C of the light guide plate 50 in which the depths of the front surface concave pattern mark 50B and the back surface concave pattern mark 50E are different.

  Unlike the front surface concave pattern mark 10B and the back surface concave pattern mark 10E formed on the light guide plate 10 with a substantially uniform depth, the light guide plate 50 gradually increases the depth of the concave pattern marks on the front surface and the back surface part. It is characterized by being different. Specifically, when the light guide plate 50 is viewed from the side surface portion 50C, the concave pattern marks on the front surface and the back surface on the right side of FIG. 9 are stepped in comparison with the depth of the concave pattern marks on the front surface and the back surface on the left side in FIG. A concave pattern mark is formed so as to be deeper. Here, when the incident light L3 of the LED light is irradiated from the left side of FIG. 9 of the side surface portion 50C, the light density is high if it is close to the light source due to optical characteristics, and the light density is low if it is far away. By changing the reflection area of the concave pattern trace from small to large, the extraction of diffused light is averaged. That is, the light guide plate 50 can average the extraction of diffused light more than the light guide plate 10. This concave pattern trace processing is effective when a one-side light source is used.

  Furthermore, the configuration of the light guide plate 60, which is an application of the configuration of the light guide plate 50 described above, will be described with reference to FIG. FIG. 10 is a schematic diagram showing the light guide plate 60 in which the depths of the front surface concave pattern mark 60B and the back surface concave pattern mark 60E are different, and the side surface part of the reflective tape 61 bonded to the light guide plate 60. .

  Unlike the front surface concave pattern mark 10B and the back surface concave pattern mark 10E formed on the light guide plate 10 with a substantially uniform depth, the light guide plate 60 gradually increases the depth of the concave pattern marks on the front surface and the back surface part. It is characterized in that a reflective tape 61 made of a metal formed in a thin film shape having a high reflectivity with respect to light in the visible light region, for example, is adhered to one side of the side surface portion of the light guide plate 60. Yes. Specifically, regarding the structure of the light guide plate 60, the depth of the front surface concave pattern mark 60B of the front surface part 60A and the depth of the back surface concave pattern mark 60E of the back surface part 60D are from the side surface part 60C ′ on the left side of FIG. The right side surface portion 60C ″ is formed so as to be deeper in stages. However, in the side surface portion 60C '' at the right end in FIG. 10, both the depth of the front surface concave pattern mark 60B of the front surface portion 60A and the depth of the back surface concave pattern mark 60E of the back surface portion 60D are formed to be relatively shallow. Has been. Specifically, for example, in the surface portion concave pattern trace 60B of the surface portion 60A shown in FIG. 10, the depth of the concave pattern trace is the shallowest in the concave pattern trace T1, the deepest in the concave pattern trace T5, and the concave. The pattern mark T1 <T2 <T3 <T4 <T5.

  Regarding the effect relating to the optical characteristics of the light guide plate 60, when the incident light L4 of LED light is irradiated from the side surface portion 60C ′ on the left side of FIG. Since the light density is lowered, the extraction of diffused light is averaged at the front surface portion 60A and the back surface portion 60D by changing the reflection area of the concave pattern trace from the small side to the large side from the left side of FIG. Here, the incident light L4 of the LED light is reflected by the side surface portion 60C ″ by the reflective tape 61 bonded to the side surface portion 60C ″ of the light guide plate 60, and the reflected light L5 is generated. Since the reflected light L5 is converted into diffused light by the concave pattern trace, the rate at which the LED light is converted into diffused light increases. Such reflected light L5 affects the diffused light at the concave pattern marks in the vicinity of the side surface portion 60C ″. Accordingly, the side surface portion 60C ″ is formed so that both the depth of the front surface concave pattern mark 60B of the front surface portion 60A and the depth of the back surface concave pattern mark 60E of the back surface portion 60D are relatively shallow. As described above, in the configuration in which the reflective tape 61 is adhered to one side of the side surface portion of the light guide plate 60, it is possible to take out uniform diffused light corresponding to the required light emitting surface size. That is, the light guide plate 60 can average the extraction of diffused light more than the light guide plate 50.

  Finally, the illumination device 200 according to the present invention will be described with reference to FIGS. 11 and 12. FIG. 11 is a side view showing the lighting device 200, and FIG. 12 is a top view showing the lighting device 200.

  The lighting device 200 includes a light guide plate 100A, a light guide plate 100B, an LED unit 110, a housing 120, and a base 130. Hereinafter, the configuration of the illumination device 200 will be described with reference to FIGS. 11 and 12. The light guide plate 100A is formed so as to imitate the shape of a lamp, for example, by performing processing such as rounding the four corners of the light guide plate 10, the light guide plate 50, or the light guide plate 60 formed in a plate shape. . The light guide plate 100B is bonded and fixed to, for example, the central portions of both surfaces of the light guide plate 100A. Specifically, when the light guide plates 100A and 100B are viewed from above, the light guide plates 100A and 100B are joined so as to have, for example, a substantially cross shape. In addition, the light guide plate is formed by embossing, for example, a piece of equipment integrally formed in a substantially cross shape.

  Moreover, the LED unit 110 which comprises the illuminating device 200 is an LED light source, for example, consists of a heat-resistant plastic, is formed from the rod-shaped part, and 1 or more white LED is arrange | positioned. Such LED units 110 are each formed to have a predetermined length in accordance with the lengths of the side surfaces of the light guide plate 100A and the light guide plate 100B. In addition, according to the length of the side part of each light-guide plate, you may cut | disconnect and use the LED unit 110 to suitable length. Moreover, it is good also as a structure which provides several white LED in the LED unit 110 integrally formed in the cross shape. Here, when white LED light is made incident on the light guide plate by applying a drive current to the white LED, the white LED light is irradiated on the concave pattern marks formed on the front surface portion and the back surface portion of the light guide plate. , Respectively, diffuse light is generated. The LED unit 110 is bonded and fixed to the light guide plate 100A and the light guide plate 100B, for example.

  Similarly, the housing | casing 120 which comprises the illuminating device 200 consists of heat resistant plastics, for example, and is formed from the substantially cone-shaped part. For example, the LED unit 110 is bonded and fixed to one end portion of such a casing 120 or screwed using a screw or the like (not shown). The casing 15 has an outer shape basically similar to that of a conventional bulb, so that when the lighting device 200 is mounted on the conventional lighting equipment, the casing 120 is interfered with the lighting equipment. It is desirable to prevent it from becoming impossible.

  Similarly, the base 130 constituting the lighting device 200 is for connecting the lighting device 200 to a light bulb socket (not shown). Such a base 130 is made of, for example, plastic and is formed in a substantially cylindrical shape, and a metal for energizing the LED disposed in the lighting device 200 is provided on a part of the outer periphery. The casing 120 is fixed to such a base 130 by, for example, bonding or press-fitting. Note that the base 130 has the same external shape and specifications as those of the base provided in the conventional light bulb, so that the lighting device 200 can be attached to the conventional light bulb socket. The diameter of the base 130 is, for example, 26 mm in diameter, which is the most common bulb size. The casing 120 and the base 130 described above may be integrally formed as a holding member that holds the LED unit 110.

  As described above, according to the illuminating device 200 that is suspended from the ceiling surface, for example, according to the first embodiment, the position of the back surface concave pattern trace with respect to the front surface concave pattern trace of the light guide plate 100 is decentered in the X and Y directions. By forming the optical characteristics, it is possible to arbitrarily select the optical characteristics related to the difference in light brightness. For example, by forming the position of the back surface concave pattern trace with respect to the front surface concave pattern trace with a half-pitch P2 eccentricity in the X and Y directions, it is possible to reduce the difference in light intensity in both the X and Y directions.

  In addition, according to the lighting device 200 that is suspended from the ceiling surface, for example, according to the first embodiment, the light guide plate obtained by joining the light guide plates 100A and 100B is disposed so as to have, for example, a substantially cross shape. This makes it possible to change the LED light from surface light emission to three-dimensional light emission in a state that does not depend on the angle of irradiation and suppresses the difference in light brightness and darkness. It can be used as lighting or decorative lighting. That is, according to the illuminating device 200, it is possible to illuminate the floor surface and the side surface with more uniformly diffused LEDs without depending on the irradiation angle.

  Furthermore, according to the lighting device 200 that is used by being suspended from, for example, the ceiling surface according to the first embodiment, it is easy to cut or cut the light guide plate. By combining and bonding, it is possible to easily form the lighting device 200 having a light emitting portion having an arbitrary shape. Therefore, it is possible to easily manufacture the lighting device 200 having a light distribution characteristic according to the shape of the facility and the user's request.

  In addition, according to the illuminating device 200 suspended from the ceiling surface, for example, according to the first embodiment, the processing member 20 is pressed by pressing the ultrasonic processing portion 20A of the processing tool 20 against one main surface of the processing member 5. The light guide plate 100 in which the light guide plate 10 and the like in which a plurality of reflective dots reflecting matrix-like processed dots are formed at a time on one main surface is formed in a predetermined shape is used. In this way, in the light guide plate 100 that can deal with a small amount and a variety of products, flexible dot processing using an ultrasonic multihorn can be supported, and the tact associated with manufacturing can be greatly shortened.

  In the first embodiment described above, each of the optical devices has been described as an optical device in which a plurality of light guide plates are combined in a predetermined shape and disposed in the lighting device. However, the present invention is not limited to such a form. Modifications can be made as appropriate without departing from the scope of the invention. Moreover, LED arrange | positioned in an LED unit is not limited to white LED, For example, it is good also as LED which consists of one color in white, red, blue, and green, or the combination of these LED of each color.

5 Processing member 10 Light guide plate 10A Surface portion 10B Surface portion concave pattern mark 10C Side surface portion 10D Back surface portion 10E Back surface portion concave pattern mark 20 Processing tool 20A Ultrasonic processing section 20B Support section 30 Ultrasonic processing apparatus 31 Machine base 32 Worktable 33 Moving mechanism 34 Vacuum pump 35 Ultrasonic oscillator 40 Light guide plate 40A Surface portion 40B Surface portion concave pattern mark 40C Side surface portion 40D Back surface portion 40E Back surface portion concave pattern mark 50 Light guide plate 50A Surface portion 50B Surface portion concave pattern mark 50C Side surface portion 50D Back surface Part 50E back side concave pattern mark 60 light guide plate 60A surface part 60B surface part concave pattern mark 60C ', 60C''side face part 60D back side part 60E back side concave pattern mark 61 reflective tape 100A, 100B light guide plate 110 LED unit 120 housing 130 Base 200 Illumination Device D Probe H1, H2, H3, H4 Processing start reference height P1 Pitch P2 Half pitch L1, L2, L3, L4 Incident light L5 Reflected light T1, T2, T3, T4, T5 Concave pattern trace

Claims (7)

A plurality of transparent light guide plates formed on a main surface orthogonal to the side surface and reflecting dots for guiding light incident from the side surface as diffused light ;
An LED light source that is provided along the side surfaces of the plurality of light guide plates , and that allows LED light to enter from the side surfaces of the plurality of light guide plates;
A holding member for holding the LED light source;
In the plurality of light guide plates, the side surface of the other light guide plate and a surface orthogonal to the main surface are joined to the main surface of one light guide plate at a predetermined angle. apparatus. Wherein the plurality of light guide plate and characterized in that it is joined at an angle the side and perpendicular to the surface to each of the main surface of the other of said light guide plate with respect to the major surface of one of the light guide plate is substantially perpendicular The lighting device according to claim 1. The lighting device according to claim 1, wherein the reflective dots of the light guide plate are formed on one or both of the opposing main surfaces of the light guide plate. The illuminating device according to claim 1, wherein the reflective dots of the light guide plate are formed with different depths on one or both of the opposing main surfaces of the light guide plate. The reflective dots of the light guide plate are respectively formed on both opposing main surfaces of the light guide plate so as to be the same face-to-face or non-face-to-face. Lighting equipment. The at least one direction of the extension direction of the quadrangular pyramid ridgeline of the processed dots of the light guide plate is substantially parallel to the incident direction of light incident from the side surface of the light guide plate substrate. The lighting device described in 1. The lighting device according to claim 1, wherein the processed dots of the light guide plate have a quadrangular pyramid shape.