JP2009239235A - Led module, and led display - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an LED module that provides displays to a person in front of the LED module and a person behind it simultaneously. <P>SOLUTION: The LED module includes a translucent substrate 2, LED units 4 disposed longitudinally and laterally at predetermined intervals on the translucent substrate 2, and emitting light in a direction along the translucent substrate 2, and optical control units 5 provided on the translucent substrate 2 to be disposed corresponding to respective regions irradiated with the light from the LED units 4, and emitting irradiation light from the LED units 4 to the front side and back side of the translucent substrate 2. Each optical control unit 5 is constituted by dispersing diffusion pieces 52 in a light-transmissive resin 51, and a transparent conductive film serving as wiring 44 of the LED unit 4 is formed on the translucent substrate 2. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to an LED module and an LED display device that perform display using LEDs as pixels.

  2. Description of the Related Art Conventionally, LED modules that perform display using LEDs (light emitting diodes) for pixels are known. For example, in Patent Document 1, LEDs are provided in front of intersections of a rectangular mesh substrate, and LEDs serving as pixels are arranged vertically and horizontally, and a control unit and a drive unit corresponding to each LED and a wiring connecting them are connected to the square. An LED module provided on the back of a vertical cross or a horizontal cross of a mesh substrate is disclosed.

JP-A-2005-345900

  By the way, the existing LED module like the said patent document 1 light-emits LED with respect to the front side of the board | substrate which is the LED installation side of a board | substrate, and displays to the person located in the front side of an LED module It is. However, in the display of the LED module, there is also a demand for an LED module that can display simultaneously for a person located on the front side of the LED module and a person located on the back side.

  This invention is proposed in view of the said subject, Comprising: The LED module and LED display apparatus which can perform a display simultaneously with respect to the person located in the front side of a LED module, and the person located in a back side are provided. For the purpose.

  The LED module of the present invention includes a translucent substrate having translucency, an LED unit disposed on the translucent substrate at a predetermined interval, and irradiating light in a direction along the translucent substrate; Light control that is arranged on each of the light irradiating regions from the LED unit and is provided on the translucent substrate, and emits light emitted from the LED unit to at least the front side and the back side of the translucent substrate. And a section. The light-transmitting substrate can be, for example, glass, silicon, an insulating resin film, and the like. Also, the light-transmitting substrate in which the LED portion is provided vertically and horizontally, or the elongated light-transmitting device in which the LED portion is provided vertically or horizontally. It is possible to use a conductive substrate. In addition, the LED portion can be provided with a single color LED in addition to a configuration in which RGB LEDs arranged close to each other are provided as a unit. Moreover, although it is good also as a structure which installs LED which irradiates ahead in a horizontal direction in a LED part, it is suitable if it is set as the structure which installs the side view type LED in which the light emission of LED is irradiated sideways.

  In the LED module of the present invention, the light control unit is configured to cover the light emitting unit of the LED unit and diffuse and emit the irradiation light of the LED unit. With the above configuration, it is possible to recognize pixels in a wide range and to make the display of the LED module visible from a wide range. In addition, the uniformity of bright spots can be improved.

  In the LED module of the present invention, the light control unit is configured by dispersing and embedding diffusion pieces having a melting temperature higher than that of the translucent resin in the translucent resin. With the above configuration, an effective light diffusion effect can be obtained with a low cost and simple structure, and pixels can be recognized in a wider range, and the display of the LED module can be visually recognized from a wider range. . Further, the light control unit can be easily manufactured by dispersing and molding the diffusion piece in the translucent resin.

  The LED module of the present invention is characterized in that the light control unit is formed of a material having a refractive index equal to or lower than that of the translucent substrate. With the above configuration, light can be incident on the translucent substrate without causing total reflection, and light can be efficiently emitted from the back side of the translucent substrate.

  The LED module of the present invention is characterized in that the translucent substrate is formed of a flexible or soft material. By the said structure, an LED module can be deform | transformed into a curved surface shape, and it can be set as the LED module which can be visually recognized from the front side and back side by a curved surface shape. Furthermore, it becomes possible to make it small by winding in a roll shape, to improve the portability at the time of transportation, and to develop the target shape at the time of installation. Furthermore, it becomes possible to store the product by winding it in a roll shape, and it is possible to save the storage space. In addition, when the translucent substrate is formed of a material having a high workability of 0.5 mm or less having mechanical properties equivalent to PET, for example, which can be cut with a general scissors, the user can transmit the translucent substrate. Can be cut to the extent that the wiring pattern is not cut, and the outer shape of the LED module can be changed to an arbitrary shape, and LED modules for various applications can be configured.

  In addition, the LED module of the present invention includes a transparent conductive film that is formed on the translucent substrate and serves as the wiring of the LED unit. With the above configuration, the wiring area of the LED can be made transparent, the translucency can be greatly increased, and the aesthetics can be further improved. Note that the transparent conductive film is suitably used, for example, in addition to ITO (indium tin oxide), a zinc oxide-based material, and the width of the insulating groove in the wiring pattern of the transparent conductive film is determined by workability, From the viewpoints of the area of the insulative and translucent substrate, the area is preferably 30 μm to 100 μm.

  Moreover, the LED module of the present invention is characterized in that an opaque conductive material having higher conductivity than the transparent conductive film is linearly coated on a predetermined transparent conductive film among the transparent conductive films. Usually, the voltage drop due to the transparent conductive film is very high, but the above configuration can reduce the voltage drop of the wiring pattern while suppressing the decrease in translucency, thereby further reducing the overall power consumption. it can. The conductive material is preferably coated with a fineness of 1 mm or less so as not to impede translucency. The conductive material is appropriate as long as it satisfies the above requirements, but is preferably a conductive paste such as Dotite (registered trademark). Moreover, it can also be set as the structure which replaces with the structure which provides the said electroconductive material in a linear form, and provides a predetermined space | interval at a dot form.

  In addition, the LED display device of the present invention is configured by arranging a plurality of the LED modules of the present invention in a predetermined pattern. With the above configuration, a large-screen LED display device having the characteristics of the LED module of the present invention can be obtained.

  The invention disclosed in this specification includes, in addition to the configurations of each invention and each embodiment, those specified by changing these partial configurations to other configurations disclosed in this specification, or these configurations. To which other configurations disclosed in the present specification are added and specified, or those partial configurations deleted and specified to the extent that partial effects can be obtained are included.

  The LED module or the LED display device of the present invention irradiates light in the direction along the translucent substrate by the LED unit, and emits the LED irradiation light to the front side and the back side by the light control unit provided in the light irradiation region. By doing so, it is possible to simultaneously display to the person located on the front side of the LED module and the person located on the back side. In addition, by using a translucent substrate, a see-through from the front side to the back side and a see-through from the back side to the front side can be ensured, and a display in which the opposite side can be seen through on both sides can be realized.

  The present invention will be described based on the LED module of the embodiment.

[First Embodiment]
As shown in FIGS. 1 to 3, the LED module 1 according to the first embodiment includes a translucent substrate 2 having translucency, and a lamp that is disposed on the translucent substrate 2 at predetermined intervals vertically and horizontally. The light body part 3 includes a body part 3, and the light body part 3 is arranged corresponding to an irradiation area of light from the LED part 4 and the LED part 4 that irradiates light in a direction along the translucent board 2. The light control unit 5 is configured to emit light emitted from the LED unit 4 to the front side and the back side of the translucent substrate 2.

  The translucent substrate 2 is rectangular when viewed from the front, has an insulating property, and is formed of a hard material such as a hard resin such as an acrylic resin or glass. In addition, the material of the translucent board | substrate 2 is appropriate according to the use etc. of the LED module 1, and it is also possible to use a soft material other than a hard material. For example, you may form with flexible resin films, such as PET (polyethylene terephthalate), PEN (polyethylene naphthalate), and PC (polycarbonate) which can be cut | disconnected easily with a common scissors.

  The LED unit 4 includes a light emitting unit 41, a housing 42, a light emitting unit 41 to be placed, and a rectangular support substrate 43 that supports the housing 42, and a control unit illustrated in FIG. 45 and the drive unit 46. The light emitting unit 41 and the housing 42 are disposed so as to be positioned on the front side of the LED module 1, the support substrate 43 is disposed so as to be positioned on the back side of the LED module 1, and the support substrate 43 is light-transmitted by an adhesive or the like. Fixed to the conductive substrate 2. The light emitting unit 41 is a side view type, and is installed so as to irradiate light from the light emitting unit 41 to the side and irradiate light in a direction along the front surface of the translucent substrate 2. Light is emitted toward the approximate center of the portion 5. As the wiring 44, an appropriate conductive line can be used. For example, a configuration using a transparent conductive film such as ITO (indium tin oxide) or a transparent conductive film such as ITO is used, which is more conductive than the transparent conductive film. It is preferable to apply an opaque conductive paste having high properties in a linear shape.

  The control unit 45 and the drive unit 46 connected to the LED unit 4 via the wiring 44 are provided, for example, near the periphery of the translucent substrate 2. In the control unit 45 corresponding to each LED unit 4, an address for recognizing the dimming control signal is set and stored in the built-in memory. The control unit 45 and the drive unit 46 corresponding to each LED unit 4 are supplied with a dimming control signal from the transmission device 6 and also supplied with power from the power supply device 7, and S in FIG. Is a signal line for the dimming control signal, P is a power supply line, and G is a ground line. The dimming control signal supplied from the transmission device 6 includes dimming control data corresponding to the set addresses of all the control units 45 of each LED unit 4 such as a DMX signal, for example. The dimming control data corresponding to its own set address is recognized from the light control signal and is driven by the driving unit 46 of the corresponding LED unit 4. Reference numerals 47r, 47g, and 47b are red, green, and blue display LEDs built in each LED section 4.

  The light control unit 5 is provided so as to cover the periphery of the light emitting unit 41 of the LED unit 4, and is embedded in a substantially hemispherical translucent resin 51 and the translucent resin 51 in a substantially uniform and dispersed manner. And a substantially spherical diffusion piece 52. The convex surface 511 of the substantially hemispherical translucent resin 51 is disposed toward the front side of the LED module 1, and the flat surface 512 is disposed toward the back side of the LED module 1, and the adhesive is applied to the translucent substrate 2. And so on. In the mounting hole 53 formed in the translucent resin 51, a part of the LED unit 4, in the present embodiment, a part of the light emitting unit 41, a part of the housing 42, and a part of the support substrate 43 are inserted and fixed. Yes.

  The translucent resin 51 is formed using, for example, various plastic molding materials such as acrylic and polycarbonate. The translucent resin 51 or the light control unit 5 can be formed of an appropriate material having a required function, but is preferably a material having a refractive index equal to or lower than that of the translucent substrate 2 and more preferably the translucent resin. It is preferable to use the same material as the refractive index of the optical substrate 2. That is, when the refractive index of the translucent resin 51 is larger than that of the translucent substrate 2, light having a critical angle or more is totally reflected and trapped in the translucent resin 51, and unintended light is transmitted to the front surface of the translucent substrate 2. When the refractive index of the translucent resin 51 is smaller than that of the translucent substrate 2, the total reflection does not occur and the translucent substrate is emitted. When light is incident on the light-transmitting substrate 2 and light is efficiently emitted from the back side of the light-transmitting substrate 2, and the refractive indexes of the light-transmitting substrate 2 and the light-transmitting resin 51 are the same, Refraction generated between the light-transmitting substrate 2 and the light-transmitting resin 51 can be eliminated or suppressed as much as possible, and light can be emitted from the back side of the light-transmitting substrate 2 by being controlled in a more intentional manner.

  In addition, the diffusion piece 52 in the present embodiment is a substantially spherical glass bead, and the diameter of the diffusion piece 52 of this example is about 10 μm to 200 μm. The size of the diffusion piece 52 is preferably about 1/100 to 1/10 of the size of the light control unit 5. The glass beads are dispersed and arranged in the translucent resin 51 by stirring and mixing at the time of manufacture. An appropriate material can be used for the diffusing piece 52, but glass beads generally have better heat resistance than the translucent resin 51 and are not easily melted. Therefore, the light control unit 5 is mixed with the translucent resin 51. Is easy to manufacture, and is inexpensive, so it is a good material for the diffusion piece 52. Furthermore, in addition to glass beads, it is preferable to use a material such as a light-transmitting resin having a melting temperature higher than that of the light-transmitting resin 51 because the manufacturing operation becomes easy. Further, the shape of the diffusion piece 52 is not limited to the spherical shape, and the diameter thereof is not limited to the above-mentioned size, but is preferably set to 1/5 or less of the size of the light emitting portion 41. The translucent resin 51 and the translucent substrate 2 can be integrally formed. In that case, the diffusion piece 52 is not provided in the translucent resin 51, or the diffusion piece 52 and the translucent light are translucent. It is possible to adopt a configuration in which both the resin 51 and the translucent substrate 2 are provided.

  The LED module 1 according to the first embodiment can be used alone, but a plurality of LED modules 1 may be arranged in a predetermined pattern to constitute an LED display device. For example, as shown in FIG. 1, a grid array fixture 8 composed of vertical bars and horizontal bars is used, and the LED modules 1 are arranged in a matrix by the grid array fixture 8, and a plurality of LED modules 1 are arranged in a matrix. The LED display device is arranged. Concave grooves are formed in the opposing surfaces of the vertical beam and the horizontal beam, respectively, along the longitudinal direction, and the LED module 1 is attached to the grid array device 8 by engaging the vicinity of the periphery of each LED module 1 with the groove. Removably attached. Wiring drawn from each LED module 1 is led to the peripheral portion or the outer periphery of the LED display device along, for example, the vertical beam or the horizontal beam, or both, and is arranged at the peripheral portion or the outer periphery. And a power supply circuit and the like. With the above configuration, for example, a large-screen LED display device can be configured. Instead of the LED display device using the grid-type array fixture 8, screw holes are provided corresponding to the four corners of each opening of the grid-type array fixture composed of vertical bars and horizontal bars, and are inserted into the screw holes. An LED display device may be configured by attaching the LED module 1 to the lattice array device.

  The LED module 1 and the LED display device according to the first embodiment irradiate light in the direction along the translucent substrate 2 by the LED unit 4, and the light control unit 5 provided in the light irradiation region emits the irradiation light to the front side. By emitting to the back side, it is possible to simultaneously display to the person located on the front side of the LED module and the person located on the back side. In addition, since the front side of the light control unit 5 is a hemispherical surface or a convex curved surface, the viewing angle can be improved, and a display that can be viewed in a wide range can be performed on the front side. Moreover, the see-through from the front side to the back side and the see-through from the back side to the front side can be ensured by the translucent substrate 2, and a display in which the opposite side can be seen through on both sides can be realized. Further, by diffusing the light control unit 5 with the diffusing piece 52, the light diffusion effect can be obtained with a low cost and simple structure so that the pixels can be recognized in a wide range, and the display of the LED module 1 can be performed from a wide range. It can be visually recognized. In addition, by embedding the light emitting unit 41 of the lamp unit in the light control unit 5, a more uniform bright spot close to a circle can be obtained, and the sharpness can be enhanced.

[Second Embodiment]
As shown in FIGS. 5 and 6, the LED module 1 of the second embodiment is different from the first embodiment only in the LED unit 4 a and the light control unit 5 a of the lamp unit. The LED unit 4a includes a light emitting unit 41a and a housing 42a, and is connected to the control unit 45 and the driving unit 46 via a wiring 44 such as a transparent conductive film as in the first embodiment. The LED unit 4 a is disposed on the front side of the LED module 1, and the housing 42 a is fixed to the translucent substrate 2. The light emitting unit 41a is a side view type, and is installed so as to irradiate light from the light emitting unit 41a toward the side and irradiate light in a direction along the front surface of the translucent substrate 2, and the light control unit 5a. It is designed to irradiate light toward the approximate center.

  The light control unit 5a includes a substantially hemispherical translucent resin 51a and a substantially spherical diffusion piece 52a embedded in a substantially uniform and dispersed manner in the translucent resin 51a. Unlike the embodiment, the mounting hole is not formed. The convex surface 511a of the substantially hemispherical translucent resin 51a is disposed toward the front side of the LED module 1, and the flat surface 512a is disposed toward the back side of the LED module 1, and the adhesive is applied to the translucent substrate 2. And so on. Moreover, the light control part 5a is provided in the position away from the light emission part 41a of the LED part 4a, and the irradiation light of the LED part 4a injects from the side of the translucent resin 51a. Other configurations are the same as those of the first embodiment. In the configuration of the second embodiment, it is possible to obtain a display with softer light, and it is not necessary to embed the lamp body in the light control unit, and the lamp body can be easily mounted.

[Third Embodiment]
As shown in FIG. 7A, the LED module 1 of the third embodiment is different from the first embodiment only in the LED unit 4b and the light control unit 5b of the lamp unit. The LED part 4b is comprised by the light emission part 41b and the housing | casing 42b, and is similarly connected and arrange | positioned by the structure similar to 2nd Embodiment. The light control unit 5b has a thick, oval shape, is formed of a light-transmitting resin 51b, and the diffusion pieces 52b are disposed in the light-transmitting resin 51b in a substantially uniform manner. The light control unit 5b is arranged so that the one flat part 53b is along the one surface of the translucent substrate 2, and the long axis direction is aligned with the light irradiation direction. And the light control part 5b is provided in the position away from the light emission part 41b of the LED part 4b, and the irradiation light of the LED part 4 injects along a substantially long axis direction from the side of the translucent resin 51b. It has become. Other configurations are the same as those of the first embodiment. In the said structure, while irradiating light to the front side of the LED module 1, and irradiating light through the translucent board | substrate 2 to the back side, with respect to the person located in the front side and back side of the LED module 1 And good display can be performed. Furthermore, it is possible to obtain a display with softer light, and it is not necessary to embed the lamp body in the light control section, so that the lamp body can be easily mounted.

[Fourth Embodiment]
As shown in FIG. 7B, the LED module 1 of the fourth embodiment is different from the first embodiment only in the LED unit 4c and the light control unit 5c of the lamp unit. The LED part 4c is comprised by the light emission part 41c and the housing | casing 42c, and is similarly connected and arrange | positioned by the structure similar to 2nd Embodiment. The light control unit 5c has a plate shape and is configured by a milky white diffusion plate coated with a resin mixed with a diffusion piece such as a glass bead or a diffusion plate mixed with a diffusion piece in the resin, and one surface is translucent. Arranged along one surface of the substrate 2. And the light control part 5c is provided in the position spaced apart from the light emission part 41c of the LED part 4c, and the irradiation light of the LED part 4c injects from the side of the light control part 5c. Other configurations are the same as those of the first embodiment. In the said structure, while irradiating light to the front side of the LED module 1, and irradiating light through the translucent board | substrate 2 to the back side, with respect to the person located in the front side and back side of the LED module 1 And good display can be performed. Furthermore, it is possible to obtain a display with softer light, and it is not necessary to embed the lamp body in the light control section, so that the lamp body can be easily mounted.

[Fifth Embodiment]
As shown in FIG. 7C, the LED module 1 of the fifth embodiment is different from the first embodiment only in the LED unit 4d and the light control unit 5d of the lamp unit. The LED unit 4d includes a light emitting unit 41d and a housing 42d, and is similarly connected and arranged in the same configuration as in the second embodiment. The light control unit 5d is a light guide plate that irradiates light with a substantially uniform illuminance on the front side and the back side, and is fixed by placing one side along one side of the translucent substrate 2. ing. And the light control part 5d is provided in the position spaced apart from the light emission part 41d of LED part 4d, and the irradiation light of LED part 4d injects from the side of the light control part 5d. Other configurations are the same as those of the first embodiment. In the said structure, while irradiating light to the front side of the LED module 1, and irradiating light through the translucent board | substrate 2 to the back side, with respect to the person located in the front side and back side of the LED module 1 And good display can be performed. Furthermore, it is possible to obtain a display with softer light, and it is not necessary to embed the lamp body in the light control section, so that the lamp body can be easily mounted.

[Sixth Embodiment]
As shown in FIG. 7D, the LED module 1 of the sixth embodiment is different from the first embodiment only in the LED unit 4e and the light control unit 5e of the lamp unit. The LED unit 4d includes a light emitting unit 41e and a housing 42e, and is connected and arranged in the same manner as in the second embodiment except that the shape is different. In the light control unit 5e, for example, a hollow case 51e having a substantially U-shape when viewed from the front is fixed to the translucent substrate 2, and a substantially triangular pyramid-shaped reflecting plate 52e is provided in the case 51e at one end. Yes. The light emitting unit 41e is arranged to face the reflecting plate 52e with a predetermined distance, and the irradiation light emitted from the light emitting unit 41e toward the reflecting plate 52e is reflected by the reflecting plate 52e. The irradiation light reflected by one reflection surface 521e which is a parabolic surface of the reflection plate 52e is emitted from the front side of the LED module 1, and the irradiation light reflected by the other reflection surface 522e which is a parabolic surface is: The light is transmitted through the translucent substrate 2 and emitted from the back side of the LED module 1. Other configurations are the same as those of the first embodiment. With the above configuration, excellent display can be performed on both the front side and the back side of the LED module 1. Furthermore, it is possible to obtain a display with softer light, and it is not necessary to embed the lamp body in the light control unit, so that the lamp body can be easily mounted.

[Modifications of Embodiment, etc.]
The present invention can be variously modified in addition to the first to sixth embodiments. For example, in the light control unit using the translucent resin, the light control unit using the light guide plate, and the light control unit using the reflection plate in each embodiment, the display LED is in contact with the light control unit, or in a non-contact manner. In the case where the light control unit made of translucent resin is used for the contact, the display LED is embedded in the translucent resin, or the light control unit. It is possible to adopt a configuration in which a basic shape such as a spherical surface is brought into contact.

  INDUSTRIAL APPLICABILITY The present invention can be used as an LED module and an LED display device that display using LEDs as pixels.

The front view of the LED module of 1st Embodiment. The partial front view of the LED module of 1st Embodiment. FIG. 3 is a cross-sectional view taken along line AA in FIG. 2. The block diagram which shows the control structure of the LED module of 1st Embodiment. The partial front view of the LED module of 2nd Embodiment. FIG. 6 is a sectional view taken along line B-B in FIG. 5. (A) is sectional drawing of the lamp | ramp part in the LED module of 3rd Embodiment, (b) is sectional drawing of the lamp | ramp part in the LED module of 4th Embodiment, (c) is 5th Embodiment. Sectional drawing of the lamp | ramp part in LED module of (6), (d) is sectional drawing of the lamp | ramp part in the LED module of 6th Embodiment.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... LED module 2 ... Translucent board | substrate 3 ... Lamp body part 4, 4a, 4b, 4c, 4d, 4e ... LED part 41, 41a, 41b, 41c, 41d, 41e ... Light emission part 42, 42a, 42b, 42c , 42d, 42e ... casing 43 ... support substrate 44 ... wiring 45 ... control unit 46 ... drive unit 47r, 47g, 47b ... display LEDs 5, 5a, 5b, 5c, 5d, 5e ... light control units 51, 51a, 51b ... Translucent resin 511, 511a ... Convex curved surface 512, 512a ... Plane 52, 52a, 52b ... Diffusion piece 53 ... Mounting hole 53b ... Plane part 51e ... Case 52e ... Reflector plate 521e, 522e ... Reflecting surface 6 ... Transmitting device 7 ... Power supply device 8 ... Lattice array device

Claims (8)

A translucent substrate having translucency;
An LED unit that is disposed on the translucent substrate at a predetermined interval and irradiates light in a direction along the translucent substrate;
Light control that is arranged on each of the light irradiating regions from the LED unit and is provided on the translucent substrate, and emits light emitted from the LED unit to at least the front side and the back side of the translucent substrate. An LED module.   The LED module according to claim 1, wherein the light control unit is configured to cover a light emitting unit of the LED unit and diffuse and emit the irradiation light of the LED unit.   3. The LED module according to claim 2, wherein the light control unit is configured by dispersing and burying diffusion pieces having a melting temperature higher than that of the translucent resin in the translucent resin.   The LED module according to claim 1, wherein the light control unit is formed of a material having a refractive index equal to or lower than that of the translucent substrate.   The LED module according to claim 1, wherein the translucent substrate is made of a flexible or flexible material.   The LED module according to claim 1, further comprising a transparent conductive film that is formed on the translucent substrate and serves as a wiring of the LED unit.   The LED module according to claim 6, wherein an opaque conductive material having a higher conductivity than the transparent conductive film is linearly coated on a predetermined transparent conductive film among the transparent conductive films.   An LED display device comprising a plurality of LED modules according to claim 1 arranged in a predetermined pattern.

Images