WO2011013286A1 - 導光板の製造方法、導光板、バックライト装置、照明装置、及び導光板製造装置 - Google Patents
導光板の製造方法、導光板、バックライト装置、照明装置、及び導光板製造装置 Download PDFInfo
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- WO2011013286A1 WO2011013286A1 PCT/JP2010/003512 JP2010003512W WO2011013286A1 WO 2011013286 A1 WO2011013286 A1 WO 2011013286A1 JP 2010003512 W JP2010003512 W JP 2010003512W WO 2011013286 A1 WO2011013286 A1 WO 2011013286A1
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- guide plate
- light guide
- light
- ultrasonic processing
- ultrasonic
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
- G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
- G02B6/0033—Means for improving the coupling-out of light from the light guide
- G02B6/0058—Means for improving the coupling-out of light from the light guide varying in density, size, shape or depth along the light guide
- G02B6/0061—Means for improving the coupling-out of light from the light guide varying in density, size, shape or depth along the light guide to provide homogeneous light output intensity
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
- G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
- G02B6/0033—Means for improving the coupling-out of light from the light guide
- G02B6/0035—Means for improving the coupling-out of light from the light guide provided on the surface of the light guide or in the bulk of it
- G02B6/0036—2-D arrangement of prisms, protrusions, indentations or roughened surfaces
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
- G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
- G02B6/0065—Manufacturing aspects; Material aspects
Definitions
- the present invention provides a method for manufacturing a light guide plate for double-sided light emission, which can handle flexible dot processing using an ultrasonic multihorn, for manufacturing small to relatively large light guide plates of various types, and the above manufacturing method.
- the present invention relates to a manufactured light guide plate, a backlight device and an illumination device provided with the light guide plate, and a light guide plate manufacturing apparatus for manufacturing the light guide plate.
- a light guide plate in which a dot pattern is formed on the surface of the resin by melting the resin using a hot roll method or the like and then curing the resin into a predetermined shape.
- a dot pattern is uniformly formed on the surface of the light guide plate, diffused light that emits light uniformly without any spots on the surface of the light guide plate when LED light or the like is incident from the end face of the light guide plate. Can be obtained (see, for example, Patent Document 2).
- JP 2008-305713 A Japanese Patent Application No. 2006-511128
- 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. Further, there is a problem that a plurality of uniform concave pattern marks cannot be formed on the surface of the light guide plate.
- the present invention is suitable for any shape and shape in the production of a small variety of products in small to relatively large light guide plates used for guide display boards, advertisement boards, etc.
- a method of manufacturing a light guide plate that can cope with optical characteristics and can significantly reduce the manufacturing tact, a light guide plate manufactured by the manufacturing method, a backlight device and an illumination device provided with the light guide plate, And it aims at providing the light-guide plate manufacturing apparatus which manufactures the said light-guide plate which can form a some uniform concave pattern trace on the surface of a light-guide plate.
- a method of manufacturing a light guide plate according to the present invention is a method of manufacturing a light guide plate for causing light to enter from a side surface of a light guide plate substrate and to derive the light from a main surface, Processing dots are arranged in a matrix on the rectangular front end surface of the ultrasonic processing horn, and the front end surface of the ultrasonic processing horn is pressed against one main surface of the light guide plate substrate. A reflective dot reflecting the processed dot on the tip surface is formed on one main surface, and the ultrasonic processing horn is moved relative to the light guide plate substrate in the plane of the main surface. Repeating the formation of the reflective dots, forming the reflective dots in a predetermined range of one main surface of the light guide plate substrate, both opposing main surfaces of the light guide plate substrate so that the reflective dots do not face each other Are formed respectively.
- an optical suitable for any shape or shape in the production of a small variety of products in a small to relatively large light guide plate used for a guide display plate, an advertisement board, or the like It is possible to cope with the characteristics, and the tact associated with the manufacturing can be greatly shortened.
- FIG. 4 is a schematic diagram showing a concave pattern trace from the side surface of the light guide plate.
- (C) is a schematic diagram showing a state in which the back surface concave pattern trace is formed with a half pitch eccentricity in the Y direction with respect to the front surface concave pattern trace.
- (a) is a diffusion plate and a reflection sheet
- FIG. 4B is a perspective view showing the backlight device when the reflection sheet is provided on only one surface of the light guide plate
- FIG. 6D is a perspective view showing a backlight device when a reflection sheet is provided on the other surface of the light guide plate
- FIG. 6D is a backlight device when diffuser plates are provided on both surfaces of the light guide plate.
- FIG. 1 is a perspective view showing a guide lamp according to a backlight device using a light guide plate according to a first embodiment of the present invention, and (a) is a perspective view showing a state in which a guide lamp provided with a light guide plate is assembled; (B) is a perspective view showing a state in which a guide display plate is disposed on one surface of the light guide plate and a reflection sheet is disposed on the other surface of the light guide plate, and (c) is a guide display plate on both surfaces of the light guide plate.
- FIG. 1 It is a schematic diagram which shows manufacture of the light-guide plate of the 4th Embodiment of this invention
- (a) is a perspective view which shows the light-guide plate before a bending process
- (b) is a perspective view which shows the light-guide plate after a bending process.
- FIG. It is a perspective view which shows the light-guide plate of the 4th Embodiment of this invention.
- (a) is a diffusion plate and a reflection sheet
- FIG. 4B is a perspective view showing the backlight device when the reflection sheet is provided on only one surface of the light guide plate
- FIG. 6D is a perspective view showing a backlight device when a reflection sheet is provided on the other surface of the light guide plate
- FIG. 6D is a backlight device when diffuser plates are provided on both surfaces of the light guide plate.
- (E) is a perspective view which shows a backlight apparatus when an LED unit is arrange
- FIG. 4B is a schematic diagram showing the tip of the ultrasonic processing section.
- FIG. 1 It is a schematic diagram showing detection of the processing start height of the light guide plate substrate in the X-axis direction of the ultrasonic processing unit in the light guide plate manufacturing apparatus for manufacturing the light guide plate of the first to fourth embodiments of the present invention
- (A) is a schematic diagram which shows the state before starting the detection operation of the process start height of a light-guide plate base material
- (b) is a schematic diagram which shows the state in the process of detection operation of the process start height of a light-guide plate base material
- (C) is a schematic diagram which shows the state which the detection operation
- FIG. 1 It is a schematic diagram which shows the side part of the light-guide plate of the 1st thru
- (a) is a schematic diagram which shows the side part of a light-guide plate when a light-guide plate does not have a curve and a thickness spot
- b) is a schematic diagram showing a side surface portion of the light guide plate when the light guide plate has a curve or thickness unevenness.
- the light guide plate, backlight device, illumination device, light guide plate manufacturing apparatus, and light guide plate manufacturing method of the present invention will be described with reference to the drawings.
- the light guide plate, backlight device, illumination device, light guide plate manufacturing apparatus, and light guide plate manufacturing method of the present invention are not limited to the following descriptions, and may be appropriately selected within the scope of the present invention. It can be changed.
- the light guide plate, the backlight device, and the illumination device according to the first embodiment of the present invention will be described with reference to FIGS.
- a light guide plate provided in a backlight device or a lighting device according to a second embodiment of the present invention will be described with reference to FIGS.
- a light guide plate provided in a backlight device or a lighting device according to a third embodiment of the present invention will be described with reference to FIG.
- a light guide plate and a backlight device according to a fourth embodiment of the present invention will be described with reference to FIGS.
- a light guide plate manufacturing apparatus for manufacturing the light guide plate of the first to fourth embodiments of the present invention and a method of manufacturing the light guide plate using the light guide plate manufacturing apparatus will be described with reference to FIGS. 13 to 20.
- FIG. 1 is a schematic diagram showing the light guide plate 10.
- FIG. 1A is a front surface portion 10A of the light guide plate 10
- FIG. 1B is a side surface portion 10C of the light guide plate 10.
- FIG. (C) is a schematic diagram showing a back surface portion 10D of the light guide plate 10.
- 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 formed with a plurality of concave pattern marks, for example, made of a methacrylic resin (Polymethylmethacrylate) plate.
- 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 2 mm to 12 mm.
- a methacrylic resin Polymethylmethacrylate
- 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
- 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.
- FIG. 3 is a schematic diagram showing a concave pattern mark formed of a quadrangular pyramid formed on the light guide plate 10
- FIG. 3A is a schematic diagram showing a concave pattern mark from the surface portion 10A of the light guide plate 10.
- FIG. 4B is a schematic diagram showing a concave pattern mark from the side surface portion 10 ⁇ / b> C of the light guide plate 10.
- the concave pattern made of a quadrangular pyramid has a rectangular surface at the bottom, so that diffused light can be efficiently derived from the front surface portion 10A and the back surface portion 10D.
- a part of the light incident from the side surface portion 10C is irradiated to the lowermost portion 10B ′ of the surface portion concave pattern mark 10B formed on the surface portion 10A, and is in a direction away from the side surface portion 10C. Reflected to the back surface portion 10D side.
- a part of the light incident from the side surface portion 10C is irradiated to the lowermost portion 10E ′ of the back surface portion concave pattern mark 10E formed on the back surface portion 10D side, for example, in a direction away from the side surface portion 10C and the surface. Reflected on the part 10A side. Therefore, the light incident from the side surface portion 10C can be more efficiently converted into diffused light and derived from the front surface portion 10A and the back surface portion 10D.
- the concave pattern made of a quadrangular pyramid has a rectangular surface at the lowermost part, so that diffused light can be efficiently and directly transmitted from the front surface portion 10A and the back surface portion 10D. Can be derived.
- the concave pattern has a pure quadrangular pyramid shape
- the diffused light generated in the vicinity of the lowermost portion of the quadrangular pyramid has a distance from one surface 10M to the other surface 10N facing the tip portion. Since it is extremely short, the diffused light is greatly attenuated by the multiple reflection in the vicinity of the lowermost part and is not directly derived from the front surface portion 10A or the back surface portion 10D.
- the concave pattern has a rectangular surface at the lowermost part of the quadrangular pyramid
- the diffused light generated in the vicinity of the lowermost part of the quadrangular pyramid is on the other surface 10N facing the one surface 10M in the vicinity of the lowermost pyramid. Since there is a certain distance between them, it is derived directly from the front surface portion 10A or the back surface portion 10D before multiple reflection. Therefore, the light incident from the side surface portion 10C can be derived from the main surface more efficiently.
- the optical specification of the light guide plate 10 manufactured by the method of 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.
- FIG. 4 is a schematic view showing a state in which a front surface concave pattern mark 10B formed at a pitch P1 on the front surface portion 10A of the light guide plate and a back surface concave pattern mark 10E formed at a pitch P1 on the back surface portion 10D are transmitted.
- FIG. 4A shows a state in which the back surface concave pattern mark 10E is formed in the same manner with respect to the front surface concave pattern mark 10B.
- FIG. 4B shows the front surface concave pattern mark 10B.
- FIG. 4C shows a state in which the back surface concave pattern mark 10E is formed in the Y direction with respect to the front surface concave pattern mark 10B.
- the back surface concave pattern mark 10E is formed eccentrically by a half pitch P2 in both the X and Y directions with respect to the front surface concave pattern mark 10B.
- 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.
- the incident light L1 of the LED light is irradiated from the horizontal direction X of FIG.
- the incident light L2 of the LED light is applied to the concave pattern trace from the vertical direction Y of FIG.
- the condition that the front surface concave pattern marks 10B and the back surface concave pattern marks 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.
- the density of the concave pattern marks formed on the light guide plate 10 in the Y direction that can be viewed 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.4 (a), the difference of the brightness of light is the same in the Y direction.
- the density of the concave pattern marks formed on the light guide plate 10 in the X direction that can be viewed 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.4 (a), the difference of the brightness of light is the same in the X direction.
- 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 compared with the case of FIG. is there.
- 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.
- the optical characteristics can be improved. Can be arbitrarily selected. In particular, in the condition shown in FIG. 4D, since the difference in light brightness in the X and Y directions is smaller than in the condition shown in FIG. can get.
- FIG. 5 is a perspective view showing the backlight device 20 using the light guide plate 10 in a state where it is disassembled into components.
- FIG. 5 (a) shows the diffuser plate 23 and the reflection sheet 22 on both sides of the light guide plate 10.
- FIG. 5B is a perspective view showing the backlight device 20B when the reflection sheet 22 is provided on only one surface of the light guide plate 10.
- FIG. 5C is a perspective view showing the backlight device 20 ⁇ / b> C when the diffusion plate 23 is disposed only on one surface of the light guide plate 10 and the reflection sheet 22 is disposed on the other surface of the light guide plate 10.
- FIG. 5 shows the diffuser plate 23 and the reflection sheet 22 on both sides of the light guide plate 10.
- FIG. 5B is a perspective view showing the backlight device 20B when the reflection sheet 22 is provided on only one surface of the light guide plate 10.
- FIG. 5C is a perspective view showing the backlight device 20 ⁇ / b> C when the diffusion plate 23 is disposed only on one surface of the
- FIGS. 5A to 5D is a perspective view showing the backlight device 20 ⁇ / b> D when the diffusion plates 23 ⁇ / b> A and 53 ⁇ / b> B are provided on both surfaces of the light guide plate 10, respectively.
- the backlight devices 20 shown in FIGS. 5A to 5D will be described in order.
- an LED unit composed of one or more white LEDs is disposed so as to face the side surface portion 10C of the light guide plate 10.
- the 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.
- diffused light is generated. Further, the diffused light is emitted to the front surface portion 10A and the back surface portion 10D.
- the reflection sheet 22 is disposed so as to face the back surface portion 10D of the light guide plate 10 provided in the backlight device 20A.
- the diffused light emitted from the back surface portion 10D side is reflected by the reflection sheet 22 and enters the light guide plate 10, and then the incident light is emitted from the front surface portion 10A side.
- the diffusion plate 23 is disposed so as to face the surface portion 10A of the light guide plate 10 provided in the backlight device 20B.
- the diffused light emitted from the surface portion 10 ⁇ / b> A enters the diffuser plate 23, and the diffused light is further diffused by the diffuser plate 23.
- scattered luminescent spots become unclear, and the diffusion plate 23 becomes a uniform light emitting surface.
- a milk half plate is used for the diffusion plate 23, for example.
- the diffusion plate 23A and the diffusion plate 23B are arranged so as to face the front surface portion 10A and the back surface portion 10D of the light guide plate 10 provided in the backlight device 20A. Each is arranged.
- the diffused light emitted from the surface portion 10A is incident on the diffusion plate 23A disposed opposite to the surface portion 10A, and the diffused light is further diffused by the diffusion plate 23A.
- the diffused light emitted from the back surface portion 10D is incident on the diffusion plate 23B disposed to face the back surface portion 10D, and the diffused light is further diffused by the diffusion plate 23B.
- scattered luminescent spots become unclear, and both the diffusion plate 23A and the diffusion plate 23B have a uniform light emitting surface.
- a guide lamp 30 which is an example of an illumination device including a backlight device provided with the light guide plate 10 of the present embodiment will be specifically described with reference to FIGS. 6 (a) to 6 (d).
- FIG. 6 is a perspective view showing a guide lamp 30 according to a backlight device using the light guide plate 10, and FIG. 6A shows a state in which the guide lamp 30 provided with the light guide plate 10 is assembled.
- 6B is a perspective view illustrating a state in which the guide display plate 31 is disposed on one surface of the light guide plate 10 and the reflection sheet 22 is disposed on the other surface of the light guide plate 10.
- 6 (c) is a perspective view showing a state in which the guide display plate 31A and the guide display plate 31B are disposed on both surfaces of the light guide plate 10, respectively.
- FIG. 6 (d) is a guide display plate shown in FIG. 6 (c).
- FIGS. 6A to 6D It is a perspective view which shows 31 C of guide display boards when LED unit 24 is arrange
- the guide lights 30 according to the backlight devices shown in FIGS. 6A to 6D will be described in order.
- the guide lamp 30 includes a light guide plate 10, an LED unit 21, a guide display plate 31, and the like.
- the LED unit 21 is disposed so as to face the side surface portion 10 ⁇ / b> C of the light guide plate 10.
- a reflective sheet 22 is disposed so as to face the back surface portion 10D of the light guide plate 10.
- a guide display plate 31 is disposed so as to face the surface portion 10 ⁇ / b> A of the light guide plate 10.
- the guidance display board 31 uses a sheet in which a standard guidance graphic symbol or the like is pasted on the surface of a milk half plate.
- Such a guide lamp 30A is a single-sided light emitting display device, and corresponds to an applied product related to the backlight device 20C shown in FIG.
- the LED unit 21 is disposed so as to face the side surface portion 10C of the light guide plate 10.
- a guide display plate 31A and a guide display plate 31B are disposed so as to face the front surface portion 10A and the back surface portion 10D of the light guide plate 10, respectively.
- Each of the guidance display board 31A and the guidance display board 31B uses, for example, a sheet in which a standard guidance graphic symbol or the like is pasted on the surface of a milk half plate.
- Such a guide lamp 30B is a display device that emits light from both sides, and corresponds to an application product related to the backlight device 20D shown in FIG.
- the guide display plate 31C shown in FIG. 6D is provided with LED units 24 on the left and right sides of the rectangular light guide plate 10 extending in the horizontal direction, so that the center of the light guide plate 10 is compared to both ends. To prevent darkening.
- the ultrasonic processing unit 1030 provided with matrix-like processed dots is used as the light guide plate 1100.
- a plurality of reflective dots reflecting matrix-like processed dots can be formed at a time on one main surface of the light guide plate 1100.
- the ultrasonic processing unit 1030 provided with matrix-shaped processing dots can support flexible dot processing using an ultrasonic multihorn for the manufacture of light guide plates 10 of small to many types from small to relatively large.
- the manufacturing tact can be greatly shortened.
- the light guide plate 10 is compared with a case where only one processing dot is provided in the ultrasonic processing unit 1030.
- the tact associated with manufacturing can be reduced to 1/16.
- the position of the back surface concave pattern mark 10E with respect to the front surface concave pattern mark 10B is formed eccentrically in the X and Y directions, thereby reducing the difference in light brightness.
- Such optical characteristics can be arbitrarily selected. 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 decentered by a half pitch P2 in the X and Y directions, the difference in light brightness in both the X and Y directions can be reduced. .
- the light guide plate 10 is used and, for example, a single-sided light emission and double-sided light emission display device such as a guide lamp 30 is based on required optical characteristics. Can be configured.
- FIG. 7 is a schematic diagram showing the side surface portion 40C of the light guide plate 40 in which the depths of the front surface concave pattern mark 40B and the back surface concave pattern mark 40E are different.
- FIG. 8 is a schematic view 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.
- the light guide plate 40 and the light guide plate 50 of the second embodiment include a front surface concave pattern mark 10 ⁇ / b> B and a back surface concave pattern mark 10 ⁇ / b> E of substantially uniform depth formed on the light guide plate 10 of the first embodiment.
- the depth of the concave pattern marks on the front surface portion and the back surface portion is different in stages.
- the other configurations related to the light guide plate 40 and the light guide plate 50 are the same as the configuration of the light guide plate 10 described in the first embodiment. Therefore, in the light guide plate 40 and the light guide plate 50 of the second 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.
- the depth of the front surface concave pattern mark 40B of the front surface part 40A and the depth of the back surface concave pattern mark 40E of the back surface part 40D are formed so as to increase stepwise.
- the concave pattern traces on the front surface and the back surface on the right side of FIG. 7 are stepwise deeper than the depths of the concave pattern traces on the front surface and the back surface on the left side in FIG.
- a concave pattern mark is formed.
- the incident light L3 of the LED light is irradiated from the left side of FIG.
- 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.
- the reflection area of the concave pattern trace By changing the reflection area of the concave pattern trace from small to large, the extraction of diffused light is averaged.
- the incident light L4 of LED light is irradiated from the right side of FIG. 7 of the side surface portion 40C, the diffused light is extracted by changing the reflection area of the concave pattern trace from the right side of FIG. However, it is more on the right side and less on the left side. That is, this concave pattern trace processing is an effective processing method when using one-side light source.
- the light guide plate 40 shown in FIG. 7 can be applied to the backlight device 20 shown in FIG. 5 and the guide lamp 30 shown in FIG. Specifically, for example, in the guide lamp 30B shown in FIG. 6C, the LED unit 21 is disposed and used on the side surface of the light guide plate 40 on which the incident light L3 is incident.
- the depth of the front surface concave pattern mark 50 ⁇ / b> B of the front surface part 50 ⁇ / b> A and the depth of the back surface concave pattern mark 50 ⁇ / b> E of the back surface part 50 ⁇ / b> D proceed to the center of the light guide plate 50.
- Each of the light guide plates 50 is formed so as to be relatively deep, that is, shallow at the both end surfaces and deep at the center.
- the incident light L5 of the LED light is irradiated from the left side of FIG. 8 of the side surface portion 50C, the light density is high if the optical characteristics are close to the light source from the left side to the right side of FIG.
- the diffused light from the concave pattern trace on the left side of FIG. 8 is averaged out of the diffused light by changing the reflection area of the concave pattern trace reaching the center of FIG. 8 from small to large.
- the incident light L6 of LED light is irradiated from the right side of FIG. 8 of the side surface portion 50C, the light density increases from the optical characteristics to the light source 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. 8 is averaged by taking out the diffused light by changing the reflection area of the concave pattern trace on the left side reaching the center of FIG. Therefore, extraction of the entire diffused light is averaged.
- this concave pattern trace processing is an effective processing method when using both-side light sources.
- the light guide plate 50 shown in FIG. 8 can be applied to the backlight device 20 shown in FIG. 5 and the guide lamp 30 shown in FIG. Specifically, for example, in the guide lamp 30C shown in FIG. 6D, the LED unit 24 is disposed and used on the side surface of the light guide plate 40 on which the incident light L5 and the incident light L6 are incident.
- the ultrasonic processing unit 1030 is disposed on one main surface of the light guide plate 50.
- the reflective dots having a plurality of arbitrary depths are formed with respect to one main surface of the light guide plate 50 by pressing deeply or shallowly.
- FIG. 9 is a schematic diagram showing the light guide plate 60 in which the depths of the front surface concave pattern trace 60B and the back surface concave pattern trace 60E are different, and the side surface portion of the reflective tape 61 adhered to the light guide plate 60. .
- the light guide plate 60 of the third embodiment is different from the surface portion concave pattern trace 10B and the back surface concave pattern trace 10E having substantially uniform depth formed in the light guide plate 10 of the first embodiment.
- the depth of the concave pattern marks on the back surface portion is varied stepwise, and the reflective tape 61 is bonded to one side of the side surface portion of the light guide plate 60.
- the structure which concerns on the other light-guide plate 60 is the same as that of the light-guide plate 10 described in 1st Embodiment. Therefore, in the light guide plate 60 of the third embodiment, the structure and effects relating to the depth of the concave pattern marks different from those of the light guide plate 10 of the first embodiment will be specifically described.
- 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 determined from the side surface part 60C ′ on the left side in FIG. '' Is formed so as to become deeper in stages.
- 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.
- 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 incident light L7 of the LED light is irradiated from the side surface portion 60C ′ on the left side of FIG. Accordingly, by changing the reflection area of the concave pattern trace from small to large from the left side of FIG. 9, the extraction of diffused light is averaged at the front surface portion 60A and the back surface portion 60D.
- the incident light L7 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 L8 is generated.
- 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 60C ′′.
- 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.
- the light guide plate 60 shown in FIG. 9 can be applied to the backlight device 20 shown in FIG. 5 and the guide lamp 30 shown in FIG. Specifically, for example, in the guide lamp 30B shown in FIG. 6C, the LED unit 21 is disposed and used on the side surface portion 60C ′ to which the incident light L7 of the light guide plate 40 is irradiated.
- the ultrasonic processing unit 1030 is deepened stepwise into one main surface of the light guide plate.
- the reflective dots having a plurality of arbitrary depths are formed on one main surface of the light guide plate by being pressed shallowly. According to such a light guide plate 60, even 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 becomes possible to take out uniform diffused light corresponding to the required light emitting surface size, It is possible to optimize the manufacture of the light guide plate according to an arbitrary specification.
- FIG. 10 is a schematic diagram showing the processing of the light guide plate 70.
- FIG. 10 (a) shows the light guide plate 10 that is the light guide plate before bending
- FIG. 10 (b) shows the guide after the bending processing.
- 3 is a perspective view showing an optical plate 70.
- FIG. FIG. 11 is a perspective view showing the light guide plate 70.
- the light guide plate 70 of the fourth embodiment is characterized in that it is curved to a predetermined radius of curvature, unlike the light guide plate 10 formed in the planar shape of the first embodiment.
- the other configurations related to the light guide plate 70 are the same as the configurations of the light guide plate 10 described in the first embodiment. Therefore, in the light guide plate 70 of the fourth embodiment, the structure and effects different from those of the light guide plate 10 of the first embodiment will be specifically described.
- the light guide plate 70 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.
- 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 2 mm to 12 mm.
- a methacrylic resin Polymethylmethacrylate
- a front surface concave pattern mark 70 ⁇ / b> B is formed on the front surface part 70 ⁇ / b> A of the light guide plate 70
- a back surface concave pattern mark 70 ⁇ / b> E is formed on the back surface part 70 ⁇ / b> D of the light guide plate 70.
- 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.
- Such a light guide plate 70 is a concave jig having a predetermined radius of curvature (not shown), for example, after applying heat at a predetermined temperature to the light guide plate 10 formed in a flat shape as shown in FIG. By pressing down with a constant pressure in a state of being in contact with each other, as shown in FIG.
- FIG. 12 is a perspective view showing the backlight device 80 using the light guide plate 70 in an exploded state
- FIG. 12 (a) is a diagram in which the diffusion plate 83 and the reflection sheet 82 are arranged on both surfaces of the light guide plate 70
- FIG. FIG. 12B is a perspective view showing the backlight device 80B when only one surface of the light guide plate 70 is provided.
- FIG. 12B is a perspective view showing the backlight device 80B when not provided.
- FIG. 12C is a perspective view showing the backlight device 80 ⁇ / b> C when the diffusion plate 83 is disposed only on one surface of the light guide plate 70 and the reflection sheet 82 is disposed on the other surface of the light guide plate 70.
- FIG. 12 (d) is a perspective view showing the backlight device 80D when the diffusion plate 83A and the diffusion plate 83B are provided on both surfaces of the light guide plate 70, respectively.
- FIG. 12 (e) is shown in FIG. 12 (d).
- Backlight device It is a perspective view showing a backlight device 80E when the LED unit 81 at both ends of the light guide plate 70 is disposed at 0D.
- Each backlight device 80 provided with the light guide plate 70 shown in FIGS. 12A to 12D is provided with each backlight device provided with the light guide plate 10 described with reference to FIGS. 5A to 5D. Corresponds to device 20.
- the LED unit 81 is disposed on the right or left side of the curved light guide plate 70 in FIGS. 12 (a) to 12 (d).
- the LED unit 81 is disposed in this way, if a concave pattern mark is formed only on the surface portion 70 ⁇ / b> A of the light guide plate 70, the difference in brightness of light within the surface of the light guide plate 70 increases. However, if a concave pattern mark is also formed on the back surface portion 70D of the light guide plate 70, the difference in light brightness in the surface of the light guide plate 70 is reduced.
- a concave pattern mark is formed only on the surface portion 70 ⁇ / b> A of the light guide plate 70. Even if it is not, the difference in brightness of light within the plane of the light guide plate 70 is small.
- the light guide plate 10 formed in a flat shape is heated to a predetermined temperature and then curved to a predetermined curvature radius.
- a large light guide plate can be formed in a shape with an arbitrary curvature radius. Therefore, by forming the light guide plate 70 with an arbitrary curvature radius according to the required visual field range, more people can view at a time even outdoors, for example.
- the light guide plate has been described as an optical device used in a backlight device related to a guide lamp.
- the present invention is not limited to such a form, and the present invention is not limited thereto. Changes can be made as appropriate without departing from the scope of the invention.
- a light guide plate may be used in a backlight device related to a liquid crystal display.
- you may comprise a light-guide plate as an illuminating device used for an LED illuminating device.
- 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.
- the light guide plate manufacturing apparatus 1000 can process a machine base 1010 for mounting members constituting the light guide plate manufacturing apparatus 1000 and a light guide plate base material D as a processing target. Based on the work table 1020 to be arranged, a fixing mechanism for fixing the light guide plate base material D on the work base 1020, an ultrasonic processing unit 1030 for performing ultrasonic processing on the light guide plate base material D, and the input processing information. And a moving mechanism 1040 for moving the ultrasonic processing unit 1030.
- a light guide plate manufacturing apparatus 1000 moves the ultrasonic processing unit 1030 by the moving mechanism 1040 based on the control of a control unit (not shown) and presses it against the light guide plate base D, thereby guiding the light guide plate base D.
- the machine base 1010 is a base for mounting members constituting the light guide plate manufacturing apparatus 1000, and is a box-type base having a two-stage configuration of an upper plate 1011 and a lower plate 1012.
- a work table 1020 and a moving mechanism 1040 are provided on the upper plate 1011 of the machine base 1010.
- a vacuum pump 1023 and an ultrasonic oscillator 1031 are mounted on the lower plate 1012 of the machine base 1010.
- an operation unit 1013 is provided on the side surface of the machine base 1010 to allow the user to input processing information regarding the processing method of the light guide plate base material D and to control the entire light guide plate manufacturing apparatus 1000.
- an adjustment leg 1014 that can move the entire light guide plate manufacturing apparatus 1000 and adjust the inclination of the light guide plate manufacturing apparatus 1000 is provided at a corner portion of the lower surface of the machine base 1010.
- the work table 1020 is a table arranged so that the light guide plate base material D as a processing object can be processed.
- the fixing mechanism vacuum-adsorbs the light guide plate substrate D onto the work table 1020 by driving the vacuum pump 1023 to reduce the pressure inside the hole 1022.
- Such a fixing mechanism individually controls the vacuum pump 1023, a tube material (not shown) connected to the vacuum pump 1023, a vacuum chuck (not shown) disposed in the hole 1022, and the vacuum chuck. It is comprised by the control member which is not shown in figure.
- the ultrasonic processing unit 1030 is for performing ultrasonic processing on the light guide plate substrate D.
- the horn unit 1032 performs an ultrasonic processing process on the surface of the light guide plate base material D based on the drive signal supplied from the ultrasonic oscillator 1031.
- FIG. 15 (b) such a horn unit 1032 transmits vibrations to the light guide plate substrate D by contacting the light guide plate substrate D, and ultrasonic waves are applied to the surface of the light guide plate substrate D.
- a tip portion 1034 to be processed, a piezoelectric element (not shown), and a vibrator 1033 including a cone member, and a vibrator case (not shown) covering a part of the vibrator 1033 are configured.
- quadrangular pyramid-shaped processing dots are formed in a 4 ⁇ 4 matrix at the tip 1034 of the ultrasonic processing unit 1030.
- the moving mechanism 1040 is used, and the horn unit 1032 is moved by the horn moving unit according to the pattern to be processed on the surface of the light guide plate substrate D. Move in the Z-axis direction.
- the ultrasonic processing is efficiently performed on the light guide plate substrate D by moving the horn portion 1032 using the horn moving portion.
- Such a horn moving part moves the horn part 1032 in the vertical direction by using an air cylinder (not shown) connected to a compressor (not shown).
- the horn unit 1032 is moved in the vertical direction by using an air cylinder.
- an elastic member is provided inside the horn unit 1032, and the horn unit 1032 is used by using the weight of the horn unit 1032 and the restoring force of the elastic member. May be moved in the vertical direction.
- the detection mechanism of the process start height of the light-guide plate base material D which concerns on the ultrasonic processing part 1030 is demonstrated, referring FIG.
- the ultrasonic processing unit 1030 is loaded downward by its own weight and the like, and the plate 1047 is subjected to a fine position adjustment via a support block 1048 in order to support this.
- a possible stopper member 1049 is formed.
- the ultrasonic processing unit 1030 starts moving downward based on the processing information input via the operation unit 1013 and decelerates the moving speed downward in the vicinity of the light guide plate substrate D.
- the tip of the horn portion 1032 comes into contact with the surface of the light guide plate substrate D, and the ultrasonic processing portion 1030 stops as shown in FIG.
- the movable table 1046 continues to descend, the ultrasonic processing unit 1030 moves upward, and the ultrasonic processing unit 1030 and the stopper member 1049 are separated from each other as shown in FIG. The energization is released.
- the moving mechanism 1040 is for moving the ultrasonic processing unit 1030 based on the position information included in the input processing information on the processing method of the light guide plate substrate D.
- a moving mechanism 1040 includes an X-axis rail member 1041, a Y-axis rail member 1042, and a Z-axis rail member 1043 fixed on the upper plate 1011.
- the ultrasonic processing unit 1030 is formed to be movable in the Z-axis direction along the Z-axis rail member 1043.
- FIG. 16 is a schematic view showing an embossing state in which a concave pattern mark provided on the light guide plate 1100 is formed.
- FIGS. 16A to 16E are views of the light guide plate 1100 before embossing. It is a schematic diagram which shows in order the state which measures a process start reference
- the processing start reference height E1 of the surface of the light guide plate 1100 is set to the movable probe S arranged in a measurement unit (not shown) of the light guide plate manufacturing apparatus 1000. Detect by contacting the surface.
- the light guide plate 1100 for example, a transparent methacrylic resin plate having a predetermined shape is used.
- the probe S is not limited to a mechanical configuration.
- the probe S emits measurement light from a measurement unit (not shown) of the light guide plate manufacturing apparatus 1000 and receives reflected light from the surface of the light guide plate 1100. It is good also as a structure.
- the ultrasonic processing unit 1030 mounted on the light guide plate manufacturing apparatus 1000 is moved to a position above the surface portion 1100A where the processing start reference height E1 is detected.
- the ultrasonic vibration is applied to the ultrasonic processing unit 1030 provided at the tip of the ultrasonic processing unit 1030 with the processing start reference height E1 as a reference, and a predetermined depth from the processing start reference height E1 of the surface portion 1100A.
- the ultrasonic processing unit 1030 is lowered.
- the processing start reference height E2 of the surface of the light guide plate 1100 which is the next ultrasonic processing location, is detected by the movable probe S disposed in the measurement unit of the light guide plate manufacturing apparatus 1000.
- the ultrasonic processing unit 1030 mounted on the light guide plate manufacturing apparatus 1000 is moved to a position above the surface portion 1100A where the processing start reference height E2 is detected.
- the ultrasonic vibration is applied to the ultrasonic processing unit 1030 provided at the tip of the ultrasonic processing unit 1030 on the basis of the processing start reference height E2, and a predetermined depth is determined from the processing start reference height E2 of the surface portion 1100A.
- the ultrasonic processing unit 1030 is lowered.
- the processing start reference height E3 of the surface of the light guide plate 1100 which is the next ultrasonic processing location, is detected by the movable probe S disposed in the measurement unit of the light guide plate manufacturing apparatus 1000.
- the ultrasonic processing unit 1030 mounted on the light guide plate manufacturing apparatus 1000 is moved to a position above the surface portion 1100A where the processing start reference height E3 is detected. Then, using the processing start reference height E3 as a reference, ultrasonic vibration is applied to the ultrasonic processing unit 1030 provided at the tip of the ultrasonic processing unit 1030, and a predetermined depth is determined from the processing start reference height E3 of the surface portion 1100A. Then, the ultrasonic processing unit 1030 is lowered. Further, the processing start reference height E4 of the surface of the light guide plate 1100, which is the next ultrasonic processing location, is detected by the movable probe S disposed in the measurement unit of the light guide plate manufacturing apparatus 1000.
- FIG. 17 is a schematic diagram showing the side surface portion 1110C of the light guide plate 1110 according to the present invention
- FIG. 17A shows the side surface portion 1110C of the light guide plate 1110 when the light guide plate 1110 has no curvature or uneven thickness
- FIG. 17B is a schematic diagram showing the side surface portion 1110C of the light guide plate 1110 when the light guide plate 1110 has a curve or thickness unevenness
- FIG. 18 is a schematic diagram showing a side surface portion 1120A of the light guide plate 1120 when the light guide plate 1110 has a curve or a thickness unevenness in the manufacture of the conventional light guide plate 1120.
- the surface portion 1110A of the light guide plate 1110A can be detected without detecting the processing start reference height of the surface portion 1110A for each processing. Regardless of the position, the surface portion concave pattern mark 1110A having a certain depth with respect to the surface portion 1110A can be formed. Similarly, a back surface concave pattern mark 1110E having a certain depth can be formed with respect to the back surface 1110D regardless of the position of the back surface 1110D of the light guide plate 1110.
- the substrate for the light guide plate 1110 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.
- a methacrylic resin board may deform
- the methacrylic resin plate has a large error in the thickness component due to individual differences in thickness, thickness unevenness, warping, and the like.
- the depth of the front surface concave pattern mark 1110A formed on the front surface part 1110A of the light guide plate 1110 and the depth of the back surface concave pattern mark 1110E formed on the back surface part 1110D of the light guide plate 1110 are each 0.3 mm to 0. Often set to 5 mm.
- the processing start reference height is used as a reference. It is essential that the ultrasonic processing unit 1030 is lowered from the surface of the methacrylic resin plate to a predetermined depth and processed while applying ultrasonic vibration to the ultrasonic processing unit 1030 provided at the tip of the ultrasonic processing unit 1030. .
- a surface portion concave pattern trace having a certain depth is formed on the surface portion 1120A of the light guide plate 1120 as in the conventional light guide plate 1120 shown in FIG. 1120B cannot be formed.
- the back surface concave pattern mark 1120E having a certain depth cannot be formed in the back surface portion 1120D of the light guide plate 1120.
- the horn portion 1032 which is an ultrasonic processing horn descends with respect to the light guide plate substrate D, thereby processing the tip portion 1034 of the horn portion 1032.
- the contact is detected by the stopper member 1049 as described above with reference to FIG.
- FIG. 20 shows an example in which a 4 ⁇ 4 matrix-shaped concave pattern mark having a quadrangular pyramid shape is formed on the light guide plate substrate D.
- a time when it is detected that the processed portion 1034A is in contact with the main surface of the light guide plate substrate D is defined as time ta.
- an ultrasonic application timer and a hold timer are started, and ultrasonic waves are applied to the horn unit 1032 based on the control of the ultrasonic oscillator 1031.
- the operating times of the ultrasonic wave application timer and the hold timer are preset in the ultrasonic transmitter 31. Specifically, the operation time of the hold timer is until time td described later, and the operation time of the ultrasonic wave application timer is until time tc described later.
- the time-up signal of the hold timer is input to a sequencer of a control unit (not shown) and used as a trigger for raising the horn unit 1032 at time td described later.
- the processing portion 1034A of the tip portion 1034 of the horn portion 1032 is the concave pattern trace of the light guide plate base material D. It will separate in the state where it adhered to, and the shape of a concave pattern trace will collapse. Therefore, the application of ultrasonic waves to the horn unit 1032 is continued until time tc.
- the surface portion D3 and the peripheral portion D2 of the concave pattern trace formed on the light guide plate base material D are lowered to a sufficiently cooled temperature.
- the temperature of the acrylic resin that is the light guide plate base material D is lowered from around 90 ° C., which is the softening temperature of the acrylic resin, and is sufficiently cooled. Therefore, at time td, the horn unit 1032 is raised.
- the concave pattern mark formed on the light guide plate base material D has a shape that approximates the design value because the shape of the processed portion 1034A is sufficiently transferred to the concave pattern mark of the light guide plate base material D.
- the processing portion 1034A is changed to the light guide plate base material when the horn portion 1032 is raised. It is separated from the surface portion D3 of the concave pattern trace of D without affecting the shape of the surface portion D3.
- the light guide plate manufacturing method from time te to time th is the same as the light guide plate manufacturing method from time ta to time td.
- the time from time tc to time td is set, for example, between 0.05 seconds and 0.3 seconds in consideration of the material of the light guide plate base material D, the tact for manufacturing, and the like.
- the time from time tb to time td is set to about twice the time from time ta to time tb, for example.
- the tip height of the ultrasonic processing horn is the height of the processing portion 1034A of the tip portion 1034 of the horn portion 1032 and the height h1 when moving is the position of the main surface of the light guide plate substrate D.
- the processing start height h2 of processing is set to 2 mm, for example.
- the processing completion depth h3 of ultrasonic processing is set to, for example, 0.73 mm with reference to the processing start height h2 of ultrasonic processing, which is the position of the main surface of the light guide plate substrate D.
- the time from time ta to time tc is set as follows. For example, if the setting values related to the depth of the concave pattern mark are 0.11, 0.12, 0.13, 0.14, and 0.15, respectively, the actual concave formed on the light guide plate base material D The depths of the pattern marks are 0.73 mm, 0.76 mm, 0.79 mm, 0.82 mm, and 0.85 mm, respectively. That is, every time the set value related to the depth of the concave pattern trace is increased by 0.01, the actual depth of the concave pattern trace formed on the light guide plate substrate D is increased by 0.03 mm.
- the depth of the concave pattern trace formed on the light guide plate base material D is highly accurate. Can be changed.
- t1 is a time for obtaining the processing reference depth, and specifically, a time for lowering the tip portion 1034 of the horn portion 1032 from the surface of the light guide plate substrate D to a predetermined processing depth.
- t2 is a time for obtaining a predetermined amount of change related to the depth of the concave pattern trace.
- the tip portion 1034 of the horn portion 1032 provided in the ultrasonic processing portion 1030 is replaced with the light guide plate base material. This is the extended time of continuous contact with the surface of D.
- the coefficient K is a correction coefficient for obtaining the designed concave pattern mark depth.
- t1 can be appropriately changed depending on the number of tips of the multihorn (the number of processed dots) and the processing specifications of the processing material.
- t2 and K can be appropriately changed according to the processing specifications of the processing material.
- the application of ultrasonic waves to the horn unit 1032 which is an ultrasonic processing horn has been described as being controlled to be turned on or off based on a predetermined time. It is not limited to. Specifically, the electrical energy of the ultrasonic wave applied to the horn unit 1032 within the time period from the time tb to the time tc is smaller than the electrical energy of the ultrasonic wave applied to the horn unit 1032 within the time period from the time ta to the time tb. It is good also as a structure made into the control method to be made.
- the application of ultrasonic waves to the horn part 1032 is not stopped completely, and the electric waves of the ultrasonic waves applied to the horn part 1032 within the time period from time tb to time tc
- a configuration may be adopted in which the application of ultrasonic waves is continued while energy is reduced.
- the application of the ultrasonic wave to the horn for ultrasonic processing After forming a concave pattern trace to the predetermined depth in the light-guide plate base material D, the application of the ultrasonic wave to the horn for ultrasonic processing The position of the ultrasonic processing horn is maintained in a state in which the ultrasonic processing horn is maintained, and after a certain period of time has elapsed, the position of the ultrasonic processing horn is maintained for a predetermined time. Stop applying ultrasound.
- the shape of the processed portion 1034A is sufficiently transferred to the concave pattern mark of the light guide plate base material D and the peripheral portion of the concave pattern mark of the light guide plate base material D is transferred to the concave pattern mark formed on the light guide plate base material D.
- the horn part 1032 is separated from the light guide plate base material D in a state where it is sufficiently cooled and cured. Therefore, the concave pattern mark formed on the light guide plate substrate D has a reflective surface along the shape of the processed portion 1034A, and the concave pattern has a shape approximate to the design value with respect to the main surface of the light guide plate substrate D. Traces are formed with high accuracy.
- the light guide plate manufactured by the light guide plate manufacturing apparatus 1000 and the light guide plate manufacturing method when the LED light or the like is incident from the end surface of the light guide plate due to the concave pattern marks formed with high accuracy. A uniform diffused light can be obtained on the surface of the light guide plate.
- the light guide plate manufacturing apparatus for manufacturing the light guide plate according to the first to fourth embodiments of the present invention is not limited to the above-described embodiment, and can be appropriately changed without departing from the spirit of the present invention. It is.
- the ultrasonic processing unit 1030 is used as the processing unit, but a high-frequency soldering iron using a so-called high-frequency induction heating method may be used.
- the ultrasonic processing unit 1030 may be detachable from the movable table 1046 so that a high-frequency soldering iron can be attached.
- a digital microscope may be detachably formed on the front surface of the ultrasonic processing unit 1030. In addition, when a digital microscope is attached, it becomes possible to monitor the processing status at any time.
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Abstract
Description
以下、本発明の第1の実施形態の導光板10とバックライト装置及び照明装置について、図1乃至図6を参照しながら具体的に説明する。
以下、本発明の第2の実施形態のバックライト装置又は照明装置に設けられる導光板40及び導光板50について、図7及び図8を参照しながら具体的に説明する。なお、図7は表面部凹パターン痕40Bと裏面部凹パターン痕40Eの深さをそれぞれ異ならせた導光板40の側面部40Cを示す模式図である。同様に、図8は表面部凹パターン痕50Bと裏面部凹パターン痕50Eの深さをそれぞれ異ならせた導光板50の側面部50Cを示す模式図である。
以下、本発明の第3の実施形態のバックライト装置又は照明装置に設けられる導光板60について、図9を参照しながら具体的に説明する。なお、図9は表面部凹パターン痕60Bと裏面部凹パターン痕60Eの深さをそれぞれ異ならせた導光板60と該導光板60に接着させた反射テープ61の側面部を示す模式図である。
以下、本発明の第4の実施形態の導光板70及びバックライト装置について図10乃至図12を参照しながら説明する。なお、図10は導光板70の加工を示す模式図であり、さらに図10(a)は曲げ加工前の導光板である導光板10を、同様に図10(b)は曲げ加工後の導光板70を示す斜視図である。また、図11は導光板70を示す斜視図である。
10A,40A,50A,60A,70A,1100A,1110A,1120A 表面部
10B,40B,50B,60B,70B,1110B,1120B 表面部凹パターン痕
10C,40C,50C,60C' ,60C'' ,70C,1110C,1120C 側面部
10D,40D,50D,60D 70D,1110D,1120D 裏面部
10E,40E,50E,60E,70E,1110E,1120E 裏面部凹パターン痕
10M 一面
10N 他面
61 反射テープ
20,20A,20B,20C,20D,80,80A,80B,80C,80D,80E バックライト装置
21,24,81 LEDユニット
22,82 反射シート
23,23A,23B,83,83A,83B 拡散板
30,30A,30B 案内灯
31,31A,31B,31C 案内表示板
1000 導光板製造装置
1010 機台
1011 上段板
1012 下段板
1013 操作部
1014 調整脚
1020 作業台
1021 板部材
1022 孔
1023 真空ポンプ
1030 超音波加工部
1031 超音波発振器
1032 ホーン部
1033 振動子
1034 先端部
1034A 加工部位
1040 移動機構
1041 X軸レール部材
1042 Y軸レール部材
1043 Z軸レール部材
1046 可動テーブル
1047 プレート
1048 支持ブロック
1049 ストッパ部材
D 導光板基材
D1 表面部
D2 周辺部
D3 表面部
h1 移動時の高さ
h2 加工開始高さ
h3 加工完了深さ
S プローブ
E1,E2,E3,E4 加工開始基準高さ
P1 ピッチ
P2 半ピッチ
L1,L2,L3,L4,L5,L6,L7 入射光
L8 反射光
T1,T2,T3,T4,T5 凹パターン痕
Claims (19)
- 導光板用基板の側面から光を入射して主面から該光を導出させるための導光板の製造方法であって、
超音波加工用ホーンの矩形状の先端面にマトリクス状に加工ドットを配列させ、
前記超音波加工用ホーンの前記先端面を前記導光板用基板の一主面に押圧させて前記導光板用基板の一主面に前記先端面の前記加工ドットを反映した反射ドットを形成させ、
前記超音波加工用ホーンを前記導光板用基板に対して前記主面の面内で相対的に移動させて前記反射ドットの形成を繰り返し、前記導光板用基板の一主面の所定範囲に前記反射ドットを形成し、
前記反射ドットが対面同一とならないように前記導光板用基板の対向する両主面の両方にそれぞれ形成されること
を特徴とする導光板の製造方法。 - 前記導光板用基板に熱を加えて所定の曲率半径に湾曲させること
を特徴とする請求項1に記載の導光板の製造方法。 - 前記加工ドットは四角錐形状からなること
を特徴とする請求項1に記載の導光板の製造方法。 - 前記加工ドットは等間隔でマトリクス状に設けられた同一形状の前記四角錐形状からなること
を特徴とする請求項3に記載の導光板の製造方法。 - 前記加工ドットの前記四角錐形状の稜線の延長方向の少なくとも一方向は前記導光板用基板の側面から入射する光の入射方向と略平行とされること
を特徴とする請求項3に記載の導光板の製造方法。 - 前記超音波加工用ホーンによる前記加工ドットを反映した反射ドットの形成後、前記超音波加工用ホーンは前記導光板用基板に対して前記先端面の範囲分だけ相対的に移動し、次の前記超音波加工用ホーンによる前記加工ドットを反映した反射ドットを形成すること
を特徴とする請求項1に記載の導光板の製造方法。 - 前記導光板用基板は透明樹脂製平板であること
を特徴とする請求項1に記載の導光板の製造方法。 - 前記反射ドットは前記導光板用基板の対向する両主面の一方若しくは両方に形成されること
を特徴とする請求項1に記載の導光板の製造方法。 - 前記反射ドットは前記導光板用基板の対向する両主面の一方若しくは両方に前記反射ドットの深さを段階的に異ならせて形成されること
を特徴とする請求項1に記載の導光板の製造方法。 - 請求項1乃至請求項9のいずれか1項に記載の導光板の製造方法により製造されたこと
を特徴とする導光板。 - 請求項10に記載の導光板を有することを特徴とするバックライト装置。
- 請求項10に記載の導光板を有することを特徴とする照明装置。
- 導光板に形成する前の基材である導光板基材を固定する導光板基材固定部と、
前記導光板基材固定部に固定された前記導光板基材の主面を超音波の振動により部分的に溶融させて凹部を形成する超音波加工用ホーンと、
前記超音波加工用ホーンを前記導光板基材の主面に沿って移動させ且つ前記導光板基材の主面に対して押下させる移動機構と、
前記導光板基材に所定の深さまで前記凹部を形成した後に、前記超音波加工用ホーンへの超音波の印加を継続させた状態で前記超音波加工用ホーンの位置を保持するように前記超音波加工用ホーン及び前記移動機構を制御する制御部とを有すること
を特徴とする導光板製造装置。 - 前記制御部は、前記導光板基材に所定の深さまで前記凹部を形成した後に、前記超音波加工用ホーンへの超音波の印加を継続させた状態で前記超音波加工用ホーンの位置を保持し一定の時間が経過してから、前記超音波加工用ホーンの位置を保持した状態で前記超音波加工用ホーンへの超音波の印加を停止させるように前記超音波加工用ホーン及び前記移動機構を制御すること
を特徴とする請求項13に記載の導光板製造装置。 - 前記制御部は、前記超音波加工用ホーンを前記導光板基材に押下させて所定の深さまで前記凹部を形成することにより前記超音波加工用ホーンにより加熱された前記凹部の温度が軟化温度以下に下がった後に、前記導光板基材から前記超音波加工用ホーンを離間させるように前記超音波加工用ホーン及び前記移動機構を制御すること
を特徴とする請求項13に記載の導光板製造装置。 - 端面から入射した光を主面から射出する導光板の製造方法において、
前記導光板に形成する前の基材である導光板基材に超音波加工用ホーンを押下することにより前記導光板基材に所定の深さまで前記凹部を形成する凹部形成工程と、
前記超音波加工用ホーンへの超音波の印加を継続させた状態で前記超音波加工用ホーンの位置を保持する超音波加工用ホーン保持工程とを備えること
を特徴とする導光板の製造方法。 - 前記超音波加工用ホーン保持工程は、前記超音波加工用ホーンへの超音波の印加を継続させた状態で前記超音波加工用ホーンの位置を保持し一定の時間が経過してから前記超音波加工用ホーンの位置を保持した状態で前記超音波加工用ホーンへの超音波の印加を停止させること
を特徴とする請求項16に記載の導光板の製造方法。 - 前記超音波加工用ホーン保持工程は、前記超音波加工用ホーンにより加熱された前記凹部の温度が軟化温度以下に下がった後に、前記導光板基材から前記超音波加工用ホーンを離間させること
を特徴とする請求項16に記載の導光板の製造方法。 - 請求項16に記載の導光板の製造方法により製造されたこと
を特徴とする導光板。
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KR1020117008882A KR101273958B1 (ko) | 2009-07-27 | 2010-05-26 | 도광판의 제조방법, 도광판, 백라이트 장치, 조명장치 |
CN2010800033698A CN102227590A (zh) | 2009-07-27 | 2010-05-26 | 导光板的制造方法、导光板、背光装置、照明装置及导光板制造装置 |
EP10804039A EP2461083A1 (en) | 2009-07-27 | 2010-05-26 | Manufacturing method for light-guiding plate, light-guiding plate, backlight device, lighting device, and manufacturing apparatus for light-guiding plate |
TW099117082A TWI380896B (zh) | 2009-07-27 | 2010-05-27 | 導光板的製造方法、導光板、背光裝置、照明裝置、及導光板製造裝置 |
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JP4392445B2 (ja) * | 2007-12-14 | 2010-01-06 | 株式会社エス・ケー・ジー | 導光板の製造方法、導光板、及び当該導光板を用いた発光式看板 |
JP5470152B2 (ja) * | 2010-05-10 | 2014-04-16 | 株式会社フジクラ | 導光板の製造装置及び製造方法 |
CN102289029A (zh) * | 2011-08-09 | 2011-12-21 | 深圳安嵘光电产品有限公司 | 一种二合一导光板及其制作方法、照明灯具 |
JP5503621B2 (ja) * | 2011-10-28 | 2014-05-28 | 住友化学株式会社 | 導光板 |
CN102506386A (zh) * | 2011-11-10 | 2012-06-20 | 深圳安嵘光电产品有限公司 | 一种具有立体照明效果的导光板及其制作方法、照明灯具 |
JP5396498B2 (ja) * | 2012-03-02 | 2014-01-22 | 株式会社エス・ケー・ジー | 発光装置 |
KR101602027B1 (ko) * | 2012-12-21 | 2016-03-09 | 가부시끼가이샤 에스.케이.지 | 도광 부재 및 도광 부재의 제작 방법 |
CN104360429A (zh) * | 2014-10-23 | 2015-02-18 | 苏州向隆塑胶有限公司 | 导光板及其加工方法 |
CN107315220B (zh) * | 2017-07-12 | 2018-06-29 | 深圳市鸿卓电子有限公司 | 一种气泡导光板制造整机 |
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