JP2010272483A - Lighting device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a desk top linghting device coping with an optional shape in production of small quantities and various products and optical characteristics suited to the shape and greatly reducing a tact involving manufacture regardless of its relatively large size. <P>SOLUTION: The lighting device is characterized by comprising a light guide plate that machining dots are arranged in a matrix on a rectangular leading edge of an ultrasonic machining horn, the leading edge of the ultrasonic machining horn is pressed on one main surface of a substrate for the light guide plate, reflection dots reflecting the machining dots on the leading edge are formed on one main surface of the substrate for the light guide plate, the ultrasonic machining horn is moved relative to the substrate for the light guide plate in a plane of the main surface to repeat formation of the reflection dots, the reflection dots are formed in a predetermined range on one main surface of the substrate for the light guide plate, and the reflection dots are formed on opposing both main surfaces of the substrate for the light guide plate, and a support member engaging with one end of the light guide plate. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to an illuminating device provided with a light-emitting plate for double-sided light emission capable of flexible dot processing using an ultrasonic multihorn for manufacturing a relatively large-sized light guide plate of a small amount and a variety.

  2. Description of the Related Art Conventionally, in a light guide plate that uses a LED light to generate a surface light source, the cross-sectional shape of the light guide plate that is built in and used in a large-screen television receiver widens in the traveling direction of the light beam emitted from the light source. There is a configuration of a light guide plate provided with a reverse wedge-shaped reflective dot having a shape (see, for example, Patent Document 1).

JP 2008-305713 A

  However, the above-described configuration has a problem that it is difficult to cope with optical characteristics suitable for an arbitrary shape and shape in the production of a small variety of products, and a tact for manufacturing is required.

  Therefore, in view of the above-mentioned technical problems, the present invention can cope with optical characteristics suitable for any shape and shape in the production of a small variety of products even if it is relatively large, and has a tact for manufacturing. An object of the present invention is to provide a desk-mounted illumination device that can be significantly shortened.

  In order to solve the above-described problems, the illumination device of the present invention according to the present invention is a light guide plate for causing light to enter from the side surface of the light guide plate substrate and to derive the light from the main surface, and to perform ultrasonic processing. The processing dots are arranged in a matrix on the rectangular front end surface of the horn for horn, and the front end surface of the ultrasonic processing horn is pressed against one main surface of the light guide plate substrate, and the main portion of the light guide plate substrate A reflective dot reflecting the processed dot on the tip surface is formed on the surface, and the ultrasonic processing horn is moved relative to the light guide plate substrate within the plane of the main surface to A light guide plate that is formed repeatedly, the reflective dots are formed in a predetermined range of one main surface of the light guide plate substrate, and the reflective dots are respectively formed on both opposing main surfaces of the light guide plate substrate; A support member engaged with one end of the light guide plate Characterized in that it.

  According to the desk-mounted lighting device according to the present invention, even if it is relatively large, it can cope with optical characteristics suitable for any shape and shape in the production of a small variety of products, and the tact for manufacturing can be reduced. It can be greatly shortened.

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 perspective view which shows the illuminating device of the 1st Embodiment of this invention. It is a perspective view which shows the illuminating device of the 1st Embodiment of this invention. It is a perspective view which shows the illuminating device of the 2nd Embodiment of this invention. It is a perspective view which shows the illuminating device of the 2nd Embodiment of this invention. It is a perspective view which shows the illuminating device of the 3rd Embodiment of this invention. It is a perspective view which shows the illuminating device of the 3rd Embodiment of this invention. It is a schematic diagram which shows the side part of the light-guide plate which each made the depth of the surface part concave pattern trace arrange | positioned in the illuminating device of the 4th Embodiment of this invention and the back surface concave pattern trace differ. A light guide plate having different depths of the front surface concave pattern trace and the back surface concave pattern trace disposed in the illumination device of the fifth embodiment of the present invention and a side surface portion of the reflective tape bonded to the light guide plate It is a schematic diagram which shows.

  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 configuration of the light guide plate disposed in the desk-mounted illumination device according to the present invention will be described, then the light guide plate processing tool and processing device will be described, and the light guide plate manufacturing method and light guide plate optics The general specifications will be described, and finally the lighting device according to the present invention will be described.

  First, the structure of the light guide plate 10 manufactured by the method for manufacturing the light guide plate 10 disposed in the illumination device 50 and the illumination device 60 according to the present invention will be described with reference to FIGS. 1 and 2.

  FIG. 1 is a schematic diagram showing a light guide plate 10 disposed in the illumination device 50 and the illumination device 60 described later, and FIG. 1A shows a surface portion 10A of the light guide plate 10 as well as FIG. ) Is a schematic view showing a side surface portion 10C of the light guide plate 10, and similarly, FIG. FIG. 2 is a schematic view showing a part of the surface portion 10A of the light guide plate 10 in an enlarged manner.

  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, the processing tool and processing apparatus of the light guide plate 10 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 an embossing processing tool 20 for forming concave pattern marks provided on the light guide plate 10 disposed in the lighting device 50 and the lighting device 60 described later, and FIG. FIG. 3B is a schematic view showing the ultrasonic processing section 20A of the processing tool 20, and FIG. 4 shows a lighting device 50 and a lighting device 60 described later. It is a perspective view which shows the ultrasonic processing apparatus 30 for embossing which forms the concave pattern trace provided in the arrange | positioned light-guide plate 10. FIG.

  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, a method for manufacturing the light guide plate 10 will be described. 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 diagram showing an embossing state for forming a concave pattern mark provided on the light guide plate 10 provided in the illumination device 50 and the illumination device 60 described later, and FIG. (E) is a schematic diagram showing, in order, the state in which the machining start reference height of the machining member 5 is measured before embossing, and then the machining member 5 is embossed according to the machining start reference height. It is.

  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 relating to the formation of the concave pattern marks provided on the light guide plate 10 described above will be specifically described with reference to FIGS. 6 and 7.

  6 is a schematic diagram showing the lighting device 50 according to the present invention and the side surface portion 10C of the light guide plate 10 disposed in the lighting device 60. Further, FIG. FIG. 6B is a schematic diagram showing the side surface portion 10C of the light guide plate 10 when the processed member 5 has a curvature or unevenness in thickness. 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, optical specifications of the light guide plate 10 manufactured by the method for manufacturing the light guide plate 10 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.

  Note that FIG. 8 illustrates a back surface formed with a pitch P1 on the back surface portion 10D and a front surface concave pattern mark 10B formed on the surface portion 10A of the light guide plate disposed in the lighting device 50 and the lighting device 60 described later with a pitch P1. FIG. 8 (a) is a schematic diagram showing a state in which the concave / dent pattern mark 10E is transmitted, and FIG. 8 (a) shows a state in which the concave pattern mark 10E on the back surface is formed on the same surface as the concave pattern mark 10B on the front surface, Similarly, FIG. 8B shows 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. 8D shows a state in which the back surface concave pattern mark 10E is formed with respect to the front surface concave pattern mark 10B. X, Y direction Both showing the condition being formed eccentrically half pitch P2.

  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.

  Next, a configuration example of the lighting device 60 provided with the light guide plate 10 of the present embodiment will be specifically described with reference to FIG. FIG. 9 is a perspective view showing the lighting device 60.

  In the illumination device 60, an LED unit 51 composed of one or more white LEDs is disposed so as to face, for example, the upper surface portion of the light guide plate 10. Here, when white LED light is incident on the light guide plate 10 by applying a drive current to the white LED, the white LED light is irradiated to the concave pattern marks formed on the front surface portion 10A and the back surface portion 10D of the light guide plate 10. As a result, diffused light is generated. Further, the diffused light is emitted to the front surface portion 10A and the back surface portion 10D.

  In the lighting device 60, the frame 52 is a substantially U-shaped plate-shaped member for holding the light guide plate 10 and the LED unit 51 integrally from the side surfaces. Further, in the lighting device 60, the main body 50A of the desk 50 is a work space in which, for example, documents are placed and business processing is performed. The light guide plate 10 also has a function as a partition formed from a substantially plate-like portion at one end of the main body 50A.

  Next, a configuration example of the illumination device 70 provided with the light guide plate 10 of the present embodiment will be specifically described with reference to FIG. FIG. 10 is a perspective view showing the lighting device 70.

  In the illuminating device 70, the diffusion plate 53A and the diffusing plate 53B are disposed so as to face the front surface portion 10A and the back surface portion 10D of the light guide plate 10 provided in the illuminating device 70, respectively. Here, in the illuminating device 70, the diffused light emitted from the surface portion 10A of the light guide plate 10 enters the diffuser plate 53A disposed so as to face the surface portion 10A, and the diffused light is further diffused by the diffuser plate 53A. Is done. Similarly, the diffused light emitted from the back surface portion 10D of the light guide plate 10 is incident on the diffusion plate 53B disposed to face the back surface portion 10D, and the diffused light is further diffused by the diffusion plate 53B. As a result, scattered bright spots become unclear, and both the diffusion plate 53A and the diffusion plate 53B become uniform light emitting surfaces. For example, a milk half plate is used for the diffusion plate 53A and the diffusion plate 53B. The frame 54 is a substantially U-shaped plate-shaped member for integrally holding the light guide plate 10, the LED unit 51, the diffusion plate 53A, and the diffusion plate 53B from the side surfaces.

  In the lighting device, a reflection sheet is disposed so as to face the back surface portion 10D of the light guide plate 10, and diffused light emitted from the back surface portion 10D is reflected by the reflection sheet and enters the light guide plate 10. The incident light may be emitted from the surface portion 10A side. By setting it as such a structure, the light quantity discharge | released to the main-body part 50A side of the desk 50 can be improved. Similarly, in the illuminating device 50, it is good also as a structure which arrange | positions a diffusion plate so that only one surface of the surface part 10A or the back surface part 10D of the light-guide plate 10 may be opposed.

  As described above, according to the desk-mounted illumination device 60 and the illumination device 70 having a function as a partition according to the first embodiment, the ultrasonic processing unit 20 </ b> A of the processing tool 20 is pressed against one main surface of the processing member 5. Thus, the light guide plate 10 in which a plurality of reflective dots reflecting the matrix-like processed dots are formed at one time on one main surface of the processed member 5 is used. In this way, in the relatively small and large-sized light guide plate 10 by the ultrasonic processing section 20A provided with matrix-shaped processing dots, flexible dot processing using an ultrasonic multihorn can be handled, and in manufacturing. Such a tact can be greatly shortened.

  Further, according to the desk-mounted illumination device 60 and the illumination device 70 having a function as a partition according to the first embodiment, the position of the back surface concave pattern mark 10E with respect to the front surface concave pattern mark 10B of the light guide plate 10 is determined. By forming it decentered in the X and Y directions, 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 mark 10E with respect to the front surface concave pattern mark 10B so as to be eccentric by a half pitch P2 in the X and Y directions, it is possible to reduce the difference in light intensity in both the X and Y directions. .

[Second Embodiment]
Next, configurations of the desk-mounted lighting device 80 and the lighting device 90 according to the second embodiment will be described with reference to FIGS. 11 and 12. 11 and 12 are perspective views showing a lighting device according to the second embodiment of the present invention.

  Note that the illumination device 80 and the illumination device 90 of the second embodiment correspond to application examples of the illumination device 60 and the illumination device 70 of the first embodiment. Therefore, in the illumination device 80 and the illumination device 90 of the second embodiment, the structure and effects that are different from those of the illumination device 60 and the illumination device 70 of the first embodiment will be specifically described.

  In the illumination device 80 provided with the light guide plate 10 according to the present invention, the light guide plate 10 is rotatably engaged with the desk 50 as shown in FIG. Such a desk 50 includes a main body portion 50A, a side wall portion 50B, a rotation portion 50C, and a rotation knob 50D. Hereinafter, each component which comprises the desk 50 is demonstrated. The main unit 50A is a work space for carrying out paperwork by placing documents or the like, for example. Further, the side wall portion 50B is a support member that rotatably supports the light guide plate 10, and is, for example, a partition formed from a substantially plate-like portion at one end portion of the main body portion 50A.

  Similarly, in the illuminating device 80, the rotation part 50C is provided one each at the both ends of the upper surface part of the side wall part 50B. Such a rotation part 50C is formed of a substantially rectangular part, and is provided with a through hole for passing a rotation shaft of a rotation knob 50D described later. The rotation knob 50D is formed of a cylindrical portion having a protruding rotation shaft, and the rotation shaft of the rotation knob 50D passes through the rotation portion 50C and is inserted into the recess of the frame 55. The frame 55 is a substantially U-shaped and plate-shaped member for holding the light guide plate 10 and the LED unit 51 integrally from the side surfaces. Here, the rotation knob 50D is rotatably held in a state where the rotation knob 50D is biased with a constant pressure with respect to the rotation portion 50C.

  Moreover, in the illuminating device 90 provided with the light guide plate 10 according to the present invention, as shown in FIG. 12, the diffusion is performed so as to face the front surface portion 10A and the back surface portion 10D of the light guide plate 10 provided in the illuminating device 90. A plate 53A and a diffusion plate 53B are provided. Here, in the illuminating device 90, the diffused light emitted from the surface portion 10A of the light guide plate 10 enters the diffuser plate 53A disposed so as to face the surface portion 10A, and the diffused light is further diffused by the diffuser plate 53A. Is done. Similarly, the diffused light emitted from the back surface portion 10D of the light guide plate 10 is incident on the diffusion plate 53B disposed to face the back surface portion 10D, and the diffused light is further diffused by the diffusion plate 53B. As a result, scattered bright spots become unclear, and both the diffusion plate 53A and the diffusion plate 53B become uniform light emitting surfaces. For example, a milk half plate is used for the diffusion plate 53A and the diffusion plate 53B. The frame 56 is a substantially U-shaped and plate-shaped member for integrally holding the light guide plate 10, the LED unit 51, the diffusion plate 53A, and the diffusion plate 53B from the side surfaces. In addition, the illuminating device 80 and the illuminating device 90 of 2nd Embodiment can be set as the structure equipped and used for the existing desk top panel. In addition, the lighting device 80 and the lighting device 90 of the second embodiment can be configured to be detachably disposed with respect to an existing desk top panel.

  As described above, also in the desk-mounted illumination device 80 and illumination device 90 in which the angle-variable surface light source is arranged on the upper part of the partition according to the second embodiment, the ultrasonic processing unit 20A of the processing tool 20 is used as the processing member 5. The light guide plate 10 in which a plurality of reflective dots reflecting matrix-like processed dots are formed at one time on one main surface of the processing member 5 by being pressed against one main surface is used. In this way, in the relatively small and large-sized light guide plate 10 by the ultrasonic processing section 20A provided with matrix-shaped processing dots, flexible dot processing using an ultrasonic multihorn can be handled, and in manufacturing. Such a tact can be greatly shortened.

  Further, in the desk-mounted illumination device 80 and illumination device 90 in which the angle light source is arranged on the upper part of the partition according to the second embodiment, the back surface concave portion with respect to the front surface concave pattern mark 10B of the light guide plate 10 is also provided. By forming the pattern mark 10E eccentrically in the X and Y directions, 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 mark 10E with respect to the front surface concave pattern mark 10B so as to be eccentric by a half pitch P2 in the X and Y directions, it is possible to reduce the difference in light intensity in both the X and Y directions. .

[Third Embodiment]
Next, configurations of the desk-mounted lighting device 100 and the lighting device 110 according to the third embodiment will be described with reference to FIGS. 13 and 14. FIGS. 13 and 14 are perspective views showing a lighting device according to the third embodiment of the present invention.

  Note that the illumination device 100 and the illumination device 110 according to the third embodiment correspond to application examples of the illumination device 80 and the illumination device 90 according to the second embodiment. Therefore, in the lighting device 100 and the lighting device 110 according to the third embodiment, the structure and effects that are different from those of the lighting device 80 and the lighting device 90 according to the second embodiment will be specifically described.

  In the lighting device 80 provided with the light guide plate 10 according to the present invention, the light guide plate 10 is rotatably engaged with the desk 50 as shown in FIG. Such a desk 50 includes a main body portion 50A, a rotating portion 50C, and a rotating knob 50D that are the same constituent members as those in the second embodiment, and a side wall portion 50E that is a constituent member unique to the third embodiment. , A support part 50F, and an elevating part 50G. For this reason, the side wall part 50E, the support part 50F, and the raising / lowering part 50G which comprise the desk 50 are demonstrated.

  In the lighting device 80, the side wall 50E is a partition formed from a substantially plate-like portion at one end of the main body 50A. The support portion 50F is a support member that supports the light guide plate 10 so as to be movable up and down, and is provided above the side wall portion 50E. Note that the rotation mechanism of the light guide plate 10 according to the support portion 50F is the same as the rotation mechanism according to the second embodiment. Moreover, the raising / lowering part 50G is a raising / lowering member which consists of a substantially rod-shaped part each provided in the both sides of the side wall part 50E and inside the side wall part 50E. The upper end of such an elevating part 50G is connected to the lower part of the support part 50F, and the support part 50F is moved up and down by a control device or a manual device (not shown).

  Moreover, in the illuminating device 110 provided with the light guide plate 10 according to the present invention, as shown in FIG. 14, diffusion is performed so as to face the front surface portion 10A and the back surface portion 10D of the light guide plate 10 provided in the illuminating device 110. A plate 53A and a diffusion plate 53B are provided. Here, in the illumination device 110, the diffused light emitted from the surface portion 10A of the light guide plate 10 is incident on the diffusion plate 53A disposed opposite to the surface portion 10A, and the diffused light is further diffused by the diffusion plate 53A. Is done. Similarly, the diffused light emitted from the back surface portion 10D of the light guide plate 10 is incident on the diffusion plate 53B disposed to face the back surface portion 10D, and the diffused light is further diffused by the diffusion plate 53B. As a result, scattered bright spots become unclear, and both the diffusion plate 53A and the diffusion plate 53B become uniform light emitting surfaces. For example, a milk half plate is used for the diffusion plate 53A and the diffusion plate 53B.

  As described above, the ultrasonic processing unit 20A of the processing tool 20 is also processed in the desk-mounted lighting device 100 and the lighting device 110 in which the up-and-down movable angle light source is arranged on the upper part of the partition according to the third embodiment. The light guide plate 10 in which a plurality of reflective dots reflecting matrix-like processed dots are formed at one time on one main surface of the processing member 5 by pressing the main surface of the member 5 is used. In this way, in the relatively small and large-sized light guide plate 10 by the ultrasonic processing section 20A provided with matrix-shaped processing dots, flexible dot processing using an ultrasonic multihorn can be handled, and in manufacturing. Such a tact can be greatly shortened.

  Further, in the desk-mounted illumination device 100 and the illumination device 110 in which the up-and-down movable angle light source is arranged on the upper part of the partition according to the third embodiment, the surface portion concave pattern mark 10B of the light guide plate 10 is also protected. By forming the position of the back surface concave pattern mark 10E eccentrically in the X and Y directions, 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 mark 10E with respect to the front surface concave pattern mark 10B so as to be eccentric by a half pitch P2 in the X and Y directions, it is possible to reduce the difference in light intensity in both the X and Y directions. .

[Fourth Embodiment]
Next, the configuration of the light guide plate 120 disposed in the desk-mounted illumination device according to the fourth embodiment will be described with reference to FIG. FIG. 15 is a schematic diagram showing the side surface portion 120 of the light guide plate 120 in which the depths of the front surface concave pattern mark 120B and the back surface concave pattern mark 120E are different. The desk-mounted illumination device according to the fourth embodiment is characterized by the light guide plate 120, and the other configuration is the same as any one of the first to third illumination devices.

  Note that the light guide plate 120 disposed in the illumination device of the fourth embodiment has a substantially uniform depth surface portion recess formed in the light guide plate 10 disposed in the first to third illumination devices. Unlike the pattern mark 10B and the back surface concave pattern mark 10E, the depth of the concave pattern marks on the front surface part and the back surface part is different in stages. The other configurations related to the light guide plate 120 are the same as the configurations of the light guide plate 10 described in the first to third embodiments. Therefore, in the light guide plate 120 disposed in the illumination device of the fourth embodiment, the structure and effects relating to the depth of the concave pattern marks different from those of the first to third light guide plates 10 are specifically described. To do.

  In the light guide plate 120 shown in FIG. 15, the depth of the front surface concave pattern mark 120 </ b> B of the front surface part 120 </ b> A and the depth of the back surface concave pattern mark 120 </ b> E of the back surface part 120 </ b> D are In other words, the light guide plate 120 is formed so as to be shallow at both end surfaces and deep at the center. Here, when the incident light L5 of the LED light is irradiated from the left side of FIG. 15 of the side surface portion 120C, the light density increases from the left side to the right side of FIG. Accordingly, the diffused light from the concave pattern trace on the left side of FIG. 15 is averaged out of the diffused light by changing the reflection area of the concave pattern trace reaching the center of FIG. 15 from small to large. Similarly, when the incident light L6 of LED light is irradiated from the right side of FIG. 15 of the side surface portion 120C, the light density increases from the right side to the left side of FIG. Therefore, the diffused light from the concave pattern trace on the right side of FIG. 15 is averaged out of the diffused light by changing the reflection area of the left concave pattern trace reaching the center of FIG. 15 from small to large. Therefore, extraction of the entire diffused light is averaged. That is, this concave pattern trace processing is an effective processing method when using both-side light sources.

  As described above, according to the light guide plate 120 disposed in the desk-mounted illumination device according to the fourth embodiment, the ultrasonic processing unit 20A of the processing tool 20 is deeply stepped on one main surface of the processing member 5. Alternatively, the reflective dots having a plurality of arbitrary depths are formed on one main surface of the processed member 5 by pressing it shallowly. According to such a light guide plate 120, it is possible to take out diffused light corresponding to a required light emitting surface size, and it can be optimized according to an arbitrary specification.

[Fifth Embodiment]
Next, the configuration of the light guide plate 130 disposed in the illumination device according to the fifth embodiment will be described with reference to FIG. FIG. 16 is a schematic view showing the light guide plate 130 in which the depths of the front surface concave pattern mark 130B and the back surface concave pattern mark 130E are different, and the side surface part of the reflective tape 131 bonded to the light guide plate 130. The desk-mounted illumination device according to the fifth embodiment is characterized by the light guide plate 130, and the other configuration is the same as any one of the first to third illumination devices.

  The light guide plate 130 disposed in the lighting device of the fifth embodiment is a concave portion of the surface portion having a substantially uniform depth formed in the light guide plate 10 disposed in the first to third lighting devices. Unlike the pattern mark 10B and the back surface concave pattern mark 10E, the depth of the concave pattern marks on the front surface and the back surface is changed stepwise, and the reflective tape 131 is adhered to one side of the side surface of the light guide plate 130. It has a special feature. The other configurations related to the light guide plate 130 are the same as the configurations of the light guide plate 10 according to the first to third. Therefore, in the light guide plate 130 disposed in the illumination device of the fifth embodiment, the structure and effect relating to the depth of the concave pattern marks different from the light guide plate 10 of the first embodiment will be specifically described. .

  Regarding the structure of the light guide plate 130, the depth of the front surface concave pattern mark 130B of the front surface part 130A and the depth of the back surface concave pattern mark 130E of the back surface part 130D are determined from the side surface part 130C ′ on the left side in FIG. '' Is formed so as to become deeper in stages. However, in the right side surface portion 130C '' of FIG. 16, both the depth of the front surface concave pattern mark 130B of the front surface portion 130A and the depth of the back surface concave pattern mark 130E of the back surface portion 130D are relatively shallow. Has been. Specifically, for example, in the surface portion concave pattern mark 130B of the surface portion 130A shown in FIG. 16, the depth of the concave pattern mark is the shallowest at the concave pattern mark T1, the deepest at the concave pattern mark 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 130, when the incident light L7 of the LED light is irradiated from the side surface portion 130C ′ on the left side of FIG. Accordingly, by changing the reflection area of the concave pattern trace from the small side to the large side from the left side of FIG. 16, the extraction of diffused light is averaged at the front surface portion 130A and the back surface portion 130D. Here, the incident light L7 of the LED light is reflected by the side surface portion 130C ″ by the reflective tape 131 bonded to the side surface portion 130C ″ of the light guide plate 130, and the reflected light L8 is generated. Since the reflected light L8 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 L8 affects the diffused light at the concave pattern marks in the vicinity of the side surface portion 130C ″. Accordingly, the side surface portion 130C ″ is formed so that both the depth of the front surface concave pattern mark 130B of the front surface portion 130A and the depth of the back surface concave pattern mark 130E of the back surface portion 130D are relatively shallow.

  As described above, according to the light guide plate 130 disposed in the illumination device according to the fifth embodiment, the ultrasonic processing unit 20A of the processing tool 20 is pressed stepwise deeply or shallowly onto one main surface of the processing member 5. Thus, a plurality of reflective dots having an arbitrary depth are formed on one main surface of the processed member 5. According to such a light guide plate 130, even in the configuration in which the reflective tape 131 is adhered to one side of the side surface portion of the light guide plate 130, it becomes possible to extract uniform diffused light corresponding to the required light emitting surface size. It can be optimized for any specification.

  In the first to fifth embodiments described above, the lighting devices for desks have been described. However, the present invention is not limited to such forms, and can be appropriately changed without departing from the gist of the present invention. It is. 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 10F Turning portion 20 Processing tool 20A Ultrasonic processing portion 20B Support portion 30 Ultrasonic processing device 31 Machine base 32 Work table 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 Desk 50A Main body portion 50B Side wall portion 50C Rotating portion 50D Rotating knob 50E Side wall part 50F Support part 50G Elevating part 51 LED unit 52 Frame 53A, 53B Diffusion plate 54 Frame 55 Frame 56 Frame 60 Lighting device 70 Lighting device 80 Lighting device 90 Lighting device 100 Lighting device 110 Lighting device 120 Light guide plate 120A Surface part 120B Surface part concave pattern Trace 120C Side surface portion 120D Back surface portion 120E Back surface portion concave pattern mark 130 Light guide plate 130A Surface portion 130B Surface portion concave pattern mark 130C ′, 130C ″ Side surface portion 130D Back surface portion 130E Back surface concave pattern mark 131 Reflective tape D Probes H1, H2 , H3, H4 Processing start reference height P1 Pitch P2 Half pitch L1, L2, L3, L4, L5, L6, L7 Incident light L8 Reflected light T1, T2, T3, T4, T5 Concave pattern trace

Claims (9)

A light guide plate for causing light to enter from the side surface of the light guide plate substrate and to derive the light from the main surface,
The processing dots are arranged in a matrix on the rectangular tip of the ultrasonic processing horn,
The front end surface of the ultrasonic processing horn is pressed against one main surface of the light guide plate substrate to form a reflective dot reflecting the processed dots on the front end surface on one main surface of the light guide plate substrate,
The ultrasonic processing horn is moved relatively in the plane of the main surface with respect to the light guide plate substrate, and the formation of the reflective dots is repeated, so that the predetermined range of one main surface of the light guide plate substrate is reached. The reflective dots are formed,
A light guide plate in which the reflective dots are respectively formed on both opposing main surfaces of the light guide plate substrate;
An illumination device comprising: a support member that engages with one end of the light guide plate. The lighting device according to claim 1, wherein the reflective dots of the light guide plate are formed on both opposing main surfaces of the light guide plate substrate so as not to face each other or to face each other. The lighting device according to claim 1, wherein the processed dots of the light guide plate have a quadrangular pyramid shape. The at least one direction of the extending direction of the quadrangular pyramid ridge line of the processed dot 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. The lighting device according to claim 1, wherein the light guide plate substrate is a transparent resin flat plate. 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 substrate. The reflective dot of the light guide plate is formed by gradually changing the depth of the reflective dot on one or both of the opposing main surfaces of the light guide plate substrate. Lighting equipment. The lighting device according to claim 1, wherein one end of the light guide plate is rotatably supported with respect to the support member. The lighting device according to claim 1, wherein one end portion of the light guide plate is supported so as to be vertically movable with respect to the support member.