JP2017116886A - Led illumination screen - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an LED illumination screen capable of displaying such a design that an observer can feel three-dimensional depth.SOLUTION: An LED illumination screen 1 comprises: an emission light source unit 10 including an emission light source panel 11 having an LED element 112 mounted on a flexible transparent substrate 111 and a translucent panel 12 having a visible ray transmittance of 40% or more and 60% or less and a visible ray reflectance of 5% or more and 20% or less, in which the translucent panel 12 is disposed at a position where the translucent panel can reflect light emitted from the emission light source panel 11; and a light reflection unit 20 comprising a reflection panel having a visible ray reflectance of 90% or more. The light reflection unit 20 is disposed at a position where the light reflection panel can reflect the light emitted from the emission light source unit 10 and transmitted through the translucent panel 12.SELECTED DRAWING: Figure 2

Description

  The present invention relates to an LED illumination screen using a flexible transparent substrate.

  Various LED display devices such as a dot matrix display device that configures and displays desired characters, symbols, or designs by selectively emitting LED elements are becoming widespread. For example, a display window is formed on the surface of a housing containing electronic components, an LED display panel in which a plurality of LED elements are arranged in a matrix on a wiring board is provided, and the display control device controls display of the LED elements of the LED display panel. An LED display device or the like configured to do so is known as a general mode (see Patent Document 1).

  With the widespread use of LED display devices in recent years, as an application embodiment of LED display devices, design characteristics by display of shapes, patterns, colors, etc. superior in aesthetics rather than information transmission of characters, images, etc. The development of various electric screens whose main purpose is demonstration is also progressing.

JP 2006-145682 A

  The present invention is an electrical decoration screen that uses LED elements that are being developed in recent years as light sources, and is a design that allows a viewer to feel a three-dimensional depth (hereinafter referred to as “3D design” in this specification). It is an object of the present invention to provide an LED illumination screen capable of displaying.

  The inventors of the present invention have provided an illumination screen that uses an LED element as a light source, a light source unit that includes a flexible transparent substrate on which the LED element is mounted and a translucent panel that reflects about 50% of visible light, and a visible light source unit. It has been found that an LED illumination screen capable of displaying a 3D design is obtained by laminating a light reflection unit composed of a reflection panel that reflects light rays by 90% or more in an appropriate arrangement. Specifically, the present invention provides the following.

  (1) a light emitting source panel in which LED elements are mounted on a flexible transparent substrate, a translucent panel having a visible light transmittance of 40% to 60% and a visible light reflectance of 5% to 20%, And a light reflection unit comprising a light source unit and a reflective panel having a visible light reflectance of 90% or more, wherein the translucent panel is disposed at a position where light emitted from the light source panel can be reflected And the light reflecting unit is disposed at a position where the light emitted from the light emitting source unit and reflected through the translucent panel can be reflected.

The invention of (1) is a display device using an LED element as a light emission source, and is an electric decoration screen capable of displaying a design that allows a viewer to feel a three-dimensional depth. This LED illumination screen can display a 3D design having excellent design properties by appropriately laminating and arranging a light emitting source unit and a light reflection unit. More specifically, a relatively small amount of light is emitted by the limited thickness of the LED lighting screen and by a limited number of light emitting sources, and the arrangement of the light sources of these lights is more than the actual position. Can be displayed while making the viewer feel the depth.
In the present specification, visible light means light having a wavelength in the range of 360 nm to 830 nm.
The “flexible transparent substrate” in the present specification is a so-called flexible wiring substrate having a flexible resin sheet as a substrate, and means that the haze value of the substrate is 8% or less. And In addition, the “haze value” in this specification means a haze value (%) measured by a transparency test according to JISK7136.

  (2) One or more other said translucent panels are further arrange | positioned at predetermined intervals between the light emission surface of the said light emission source unit, and the said light reflection unit. LED lighting screen.

  The invention of (2) can increase the visual effect of “make the viewer visually recognize more light sources with fewer light sources”, which is exhibited in the LED illumination screen of (1).

  (3) One or a plurality of other light emitting source units are arranged with a predetermined interval on the non-light emitting surface side of one light emitting source unit, with the light emitting surface facing the one light emitting source unit side. LED lighting screen as described in (1) or (2).

  The invention of (3) further increases the visual effect of “making the viewer visually recognize more light sources with fewer light sources”, which is exhibited in the LED illumination screen of (1) or (2). Can do.

  (4) The flexible transparent substrate is formed by forming a metal wiring portion on a resin substrate, and the coverage of the resin substrate by the metal wiring portion is 2% or more in any of the flexible transparent substrates. % LED lighting screen according to any one of (1) to (3).

  In the invention of (4), the translucency inside the electric decoration screen is increased to a special range. Thereby, the above-mentioned effect of any one of the inventions (1) to (3) can be enjoyed more reliably at a higher level.

  (5) The LED illumination screen according to any one of (1) to (4), wherein the thickness of one light emitting source unit is 8 mm or less.

  The invention of (5) has the characteristic visual effect in the present application that “the viewer can visually feel a three-dimensional depth” in the LED illumination screens of (1) to (4), It can be realized by a display device with extremely small depth.

  ADVANTAGE OF THE INVENTION According to this invention, the LED display which can display the design (3D design) which a viewer can feel three-dimensional depth can be provided.

It is a perspective view which shows typically embodiment of the LED electrical decoration screen of this invention. It is sectional drawing which shows typically the layer structure of the LED electrical decoration screen of this invention. It is sectional drawing which shows typically the layer structure of other embodiment of the LED electrical decoration screen of this invention.

  Hereinafter, embodiments of the LED illumination screen of the present invention will be sequentially described. The present invention is not limited to the following embodiments, and can be implemented with appropriate modifications within the scope of the object of the present invention.

<LED lighting screen>
The LED electric decoration screen of the present invention displays a 3D design excellent in aesthetics by light emitted from a light source composed of an LED element, and is mainly used for decoration in a specific place or space. Display device. This is a screen that allows a viewer to feel the presence of an extremely large number of light sources relative to the number of LED elements mounted as light emitting sources within a three-dimensional depth.

  As shown in FIG. 2, the LED illumination screen 1 includes a light emitting source unit 10 composed of a light emitting source panel 11 and a translucent panel 12, and a light reflecting unit 20 stacked and arranged at appropriate positions. The above effects can be achieved.

  The positional relationship between the light source unit 10 and the light reflection unit 20 in the LED illumination screen 1 is not limited to a specific arrangement as long as the above-described anti-transmission and reflection are repeated. As shown in FIG. 2, it is preferable that the light reflecting unit 20 is disposed in parallel with the light emitting source unit 10 and with a predetermined interval therebetween. The distance between the light source unit 10 and the light reflection unit 20 may be adjusted as appropriate depending on the content of the 3D design to be displayed. As a general example, it is assumed that the distance is about 5 mm to 50 mm. The The appropriate distance between the units can be maintained by properly fixing each unit at a predetermined position on the outer frame such as a metal frame, but a transparent resin seal with an appropriate thickness between both units. It can also be held by interposing a material.

  In the LED illumination screen 1, as shown in FIG. 2, a part of the light emitted from the LED elements 112 disposed inside the light source unit 10 is reflected by the translucent panel 12, Other part of the light passes through the translucent panel 12 and travels toward the light reflecting unit 20. Then, the transmitted light is reflected by the light reflecting unit 20 and travels toward the translucent panel 12, where a part of the light is transmitted and a part of the light is reflected. As a result of the repetition of reflection and reflection of light, the viewer who views the screen from the light source unit 10 side of the LED illumination screen 1 has a larger number than the actual light source, that is, the number of LED elements 112 mounted. You can feel the presence of light in a three-dimensional depth.

  Further, by arranging a single or a plurality of other translucent panels at a predetermined interval between the light emitting surface of the light source unit 10 and the light reflecting unit 20, the “ It is possible to increase the visual effect that “the presence of light can be felt in a three-dimensional depth much more than the number of mounted LED elements 112”.

  Further, as shown in FIG. 3, the LED illumination screen 1 further makes the above-described design effect more remarkable by arranging a plurality of light emitting source units 10 in front of the light reflecting unit. Can do.

  There is no particular limitation on the size of the LED illumination screen 1. However, since a flexible substrate is used as the substrate material, and the degree of freedom of size processing of the substrate is high, it can be preferably used for a large-sized LED illumination screen premised on outdoor use.

[Light source unit]
The light emission source unit 10 includes a light emission source panel 11 in which an LED element 112 is mounted on a flexible transparent substrate 111 and a translucent panel 12. As shown in FIG. 2 or FIG. 3, the light emitting source unit 10 has a predetermined interval on the mounting surface of the LED element 112 of the flexible transparent substrate 111, and the light emitted from the LED element 112 passes through the translucent panel 12. In a normal embodiment, they are preferably arranged parallel to each other in a position where they can be transmitted or reflected. The distance between the LED element 112 and the translucent panel may be adjusted as appropriate according to the content of the design to be displayed. As a general example, it is assumed that the distance is about 5 mm to 50 mm. . An appropriate gap between the panels can be maintained by fixing each panel at a predetermined position of an outer frame such as a metal frame, but a transparent resin sealing material having an appropriate thickness is provided between the panels. It may be interposed.

  As shown in FIG. 3, the light source unit may be configured as a light source unit 10 </ b> A having a multilayer structure by stacking a plurality of light source panels 11. According to the light emitting source unit 10A having the multilayer structure, the visual effect of “make the viewer visually recognize more light sources with fewer light sources” can be further increased.

  The thickness of one light-emitting source unit composed of the light-emitting source panel 11 and the translucent panel 12 described in detail below is preferably 5 mm or more and 50 mm or less, and is particularly thin utilizing the flexibility of processing of a flexible substrate. From the viewpoint of conversion, it is more preferably 20 mm or less, and further preferably 8 mm or less. For example, when the thickness of one light-emitting source unit is 10 mm, when the light-emitting source unit is a single layer, an LED illumination screen having a total thickness of about 8 mm can be formed. When two light emitting source units are stacked, the same thickness can be set to about 16 mm.

(Light source panel)
As the flexible transparent substrate 111 constituting the light source panel 11, as long as a metal wiring portion (not shown) made of copper foil or the like is formed on the surface of a support substrate made of a resin film having transparency, etc. A conventionally known flexible substrate can be used as appropriate. In addition, the metal wiring part has a function of supplying electricity by causing a necessary current to flow between the LED elements, and also functions as a heat radiating part in the flexible transparent substrate 111.

  The flexible transparent substrate 111 is required to be a circuit substrate having “transparency” of a certain level or more. However, in the present specification, in the flexible transparent substrate, “having transparency” means that the haze value in the visible light region of the support substrate made of the resin film or the like is 8% or less, preferably Is 4% or less, more preferably 3% or less.

  Preferred examples of the resin used as a support substrate for the flexible transparent substrate 111 that requires transparency, heat resistance, insulation, etc. include polyimide (PI), polyethylene naphthalate (PEN), polyethylene terephthalate (PET), amorphous polyarylate, Examples thereof include polysulfone, polyethersulfone, polyetherimide, fluororesin, and liquid crystal polymer. Among these, polyethylene naphthalate (PEN) whose heat resistance and dimensional stability are improved by performing a heat resistance improvement treatment such as an annealing treatment can be particularly preferably used. The thickness of the support substrate of the flexible transparent substrate 111 is not particularly limited, but is preferably about 50 μm or more and 200 μm or less. Also, the thickness is preferably within the above-mentioned thickness range from the viewpoint of maintaining good productivity when manufacturing by the roll-to-roll method.

  Examples of the metal constituting the metal wiring part include metal foils such as aluminum, gold, silver, and copper. In order to maximize the see-through function of the flexible transparent substrate, it is conceivable to form the metal wiring portion with a transparent electrode. However, the transparent electrode is a copper that has been widely used in the past in terms of reliability and manufacturing cost in accurately applying a stable and uniform voltage to the entire circuit disposed on the entire surface of the LED element substrate. Inferior to metal wiring such as foil. In order to promote heat dissipation from the substrate, it is preferable that the metal wiring has high thermal conductivity. In this respect, the copper foil is clearly superior. The tendency of the metal foil to be dominant becomes more remarkable as the screen size of the display surface increases.

  The flexible transparent substrate 111 preferably has a substrate surface coverage of 10% or less by the metal wiring portion on the surface of the support substrate in order to sufficiently ensure the translucency inside the LED electric decoration screen 1, More preferably, it is 4% or less. By arranging the metal wiring portion in such an arrangement, the display effect of the 3D design by the LED illumination screen 1 can be more reliably enjoyed at an extremely high level.

  An insulating protective film is laminated as necessary on the other parts except the part where the electrical connection on the surface of the metal wiring part and the support substrate is required. The insulating protective film is required to be able to maintain the transparency of the flexible transparent substrate 111, like the support substrate. The haze value and other optical characteristics required for the insulating protective film are the same as those required for the support substrate, and the haze value is 8% or less, preferably 4% or less.

  The LED element 112 that is mounted on the flexible transparent substrate 111 and serves as a light source is not particularly limited, but a surface-mounted chip-type LED element can be preferably used. A chip-type LED element is a P-type semiconductor and an N-type semiconductor bonded to a fine packing made of resin, etc., in which electrodes (anode and cathode) and a reflector for mounting directly on a circuit are integrated. It is an element having a built-in diode-type light-emitting chip as a light emitter.

(Translucent panel)
The translucent panel 12 may be a panel having a visible light transmittance of 40% to 60% and a visible light reflectance of 5% to 20%. For example, an acrylic plate on which tin or silver is deposited can be preferably used. The visible light transmittance can be measured by a method based on JIS R3212.

[Light reflection unit]
The light reflection unit 20 is an essential constituent part of the LED electric decoration screen 1 including a reflection panel having a visible light reflectance of 90% or more. As the reflection panel, for example, an acrylic plate on which tin or silver is deposited can be preferably used. The visible light reflectance can be calculated according to the method described in JIS R3106 using the diffuse reflectance with reference to barium sulfate or aluminum oxide as the spectral reflectance.

<Example of LED Lighting Screen Embodiment>
For example, an embodiment as shown in FIG. In other words, it can be used instead of the background folding screen used for ceremonial occasions. Depending on the requirements of the place to be used, various LED lighting screens 1 can be designed, or by mounting 3in1 type LED elements capable of multicolor display, The background display of the pattern / brightness can be performed on the single LED illumination screen 1, and according to this, the demand for various backgrounds can be met with the single LED illumination screen 1.

DESCRIPTION OF SYMBOLS 1 LED illumination screen 10, 10A Light emission source unit 11 Light emission source panel 111 Flexible transparent substrate 112 LED element 12 Translucent panel 20 Light reflection unit

Claims (5)

A light emitting source panel in which an LED element is mounted on a flexible transparent substrate, and a translucent panel having a visible light transmittance of 40% to 60% and a visible light reflectance of 5% to 20%, A light-emitting source unit, wherein the translucent panel is disposed at a position where light emitted from the light-emitting source panel can be reflected;
A light reflection unit composed of a reflection panel having a visible light reflectance of 90% or more,
The said light reflection unit is an LED electric decoration screen arrange | positioned in the position which can reflect the light light-emitted from the said light emission source unit, and permeate | transmitted the said translucent panel.   2. The LED illumination according to claim 1, wherein one or a plurality of the other translucent panels are further arranged at a predetermined interval between a light emitting surface of the light emitting source unit and the light reflecting unit. screen.   One or a plurality of other light emitting source units are arranged on the non-light emitting surface side of the one light emitting source unit with a predetermined interval, with the light emitting surface facing the one light emitting source unit side. The LED electric decoration screen according to claim 1 or 2.   The flexible transparent substrate is formed by forming a metal wiring portion on a resin substrate, and the coverage of the resin substrate by the metal wiring portion is 2% or more and 10% or less in any of the flexible transparent substrates. The LED illumination screen according to any one of claims 1 to 3.   The LED illumination screen according to any one of claims 1 to 4, wherein the thickness of one light emitting source unit is 8 mm or less.

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