Wiring structure, light-emitting panel, and method for manufacturing wiring structure

Abstract

To provide a wiring structure which appropriately secures a power feeding function to a power fed part (for example, light-emitting part), and does not impair a degree of freedom of designability and a design, and a light-emitting panel having the same.SOLUTION: A wiring structure has a wiring part, a transparent base part, and a high refractive transparent part which extends in the transparent base part and has a refractive index higher than that of the transparent base part, wherein the wiring part passes in the high refractive transparent part. The wiring part preferably has light reflectance. A light-emitting panel has a wiring structure, and a light-emitting part which is connected to the wiring part of the wiring structure, and is supported by the transparent base part.SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] The present invention relates to Emission a light panel and Light-emitting panel a method for manufacturing the same.

Background Art

[0002] As shown in Patent Documents 1 and 2 below, a transparent light emitter (for example, a transparent light display) in which a light emitting element such as an LED (Light Emitting Diode) or an OLED (Organic Light Emitting Diode) is mounted on a transparent electrode substrate is provided. Further, Patent Documents 1 and 2 disclose, as application examples of the transparent light emitter, vehicle windows and building window glasses (hereinafter, "vehicle windows etc.") incorporating the transparent light emitter.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Patent Document 2

Summary of the Invention

Problems to be Solved by the Invention

[0004] By the way, when incorporating a transparent light emitter into a vehicle window or the like, wiring for electrically connecting a power source and the transparent light emitter and supplying power from the power source to the transparent light emitter is provided inside or on the surface of the vehicle window or the like. However, when the transparent light emitter is disposed, for example, at the center of a vehicle window or the like, the visible area of the wiring in the vehicle window or the like becomes large (long). As a result, the presence of the wiring becomes conspicuous, and the design property of the vehicle window or the like is impaired.

[0005] On the other hand, if the transparent light emitter is arranged near the edge of a vehicle window or the like, the visible area (length) of the wiring can be minimized (shortened). However, in this case, the position of the transparent light emitter in the vehicle window or the like is restricted, and the degree of freedom in the design of the transparent light emitter, the vehicle window, etc. is reduced.

[0006] In view of the above problems, an object of the present invention is to provide a wiring structure in which the power supply function to a power supply target part (for example, a light emitting part) is appropriately ensured and the degree of freedom in design and design is not impaired. Another object is to provide a light emitting panel having this wiring structure.

Means for Solving the Problems

[0007] To solve the above-described problems, a light emitting panel according to the present invention is a light emitting panel including a light emitting part and a wiring structure for supplying power to the light emitting part, wherein the wiring structure includes a wiring part, a plate-shaped transparent base for supporting the light emitting panel, and a high-refractive-index transparent part that extends within the transparent base and has a higher refractive index than the transparent base, the wiring part is provided through the high-refractive-index transparent part, and an interface between the high-refractive-index transparent part and the transparent base is formed such that light incident on the high-refractive-index transparent part at an incident angle greater than a predetermined critical angle from one surface side is totally reflected, and Of a plate-shaped transparent base emitted from the other surface side. Of a plate-shaped transparent base This is characterized by being so.

[0008] According to this aspect of the present invention, light that is incident on the high-refractive-index transparent part and totally reflected at the interface between the high-refractive-index transparent part and the transparent base is emitted from the high-refractive-index transparent part. Therefore, the shadow of the wiring part is less likely to be projected onto the emission side of the high-refractive-index transparent part, and the presence of the wiring part is less noticeable. As a result, the power supply function to the power supply target part (for example, the light emitting part) is appropriately ensured, and the degree of freedom in design and design is not impaired. Light-emitting panel can be provided.

[0009] The wiring portion is provided with: Said It is preferable that the shape of the rectangular portion is such that the length in the direction toward the other surface side is shorter than the length in the direction perpendicular to the aforementioned direction.

[0010] According to this aspect of the present invention, light that is incident on the high-refractive-index transparent portion and reaches the wiring portion is reflected, for example, toward the incident side. Therefore, the light that reaches the wiring portion is not emitted toward the exit side of the high-refractive-index transparent portion. As a result, the shadow of the wiring portion is less likely to be projected onto the exit side of the high-refractive-index transparent portion, making the presence of the wiring portion less noticeable.

[0011] Also, It is preferable that the high-refractive-index transparent part has a plate shape or a shape in which a convex part is formed at the center of the cross section in a cross-sectional view. .

[0012] According to this aspect of the present invention, light that enters the high-refractive-index transparent portion and is totally reflected at the interface between the high-refractive-index transparent portion and the transparent base portion exits from the high-refractive-index transparent portion. Therefore, the shadow of the wiring portion is less likely to be cast on the exit side of the high-refractive-index transparent portion, making the presence of the wiring portion less noticeable. This allows for a light-emitting panel that properly ensures the power supply function to the light-emitting portion and does not impair the design freedom.

[0013] Also, It is preferable to have a light reflection layer on the outer peripheral surface of the wiring part.

[0015] Also, The method for manufacturing a light-emitting panel according to the present invention is the method for manufacturing the light-emitting panel, A step of connecting the light-emitting part and the wiring part, Connected to the light-emitting part At least two resin high refractive index transparent plates are arranged on either side of the wiring portion. Member and then disposing the at least two highly refractive transparent Member The wire is crimped using a predetermined crimping means. A step of manufacturing the high-refractive-index transparent part, And a step of joining the high-refractive-index transparent part and the transparent base, characterized by having .

[0016] Original Clearly According to this, at least two high refractive index transparent portions are joined by a predetermined pressure bonding means, and therefore these high refractive index transparent portions can be joined more firmly. Effect of the Invention

[0017] According to the present invention, a power supply function to a power supply target part (for example, a light emitting part) is appropriately ensured, and the degree of freedom in design and design is not impaired. Emission A light panel can be provided.

Brief Description of the Drawings

[0018]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Figure 7

Figure 8

Figure 9

Figure 10

Embodiments for Carrying Out the Invention

[0019] [Configuration of Wiring Structure (Light Emitting Panel)] Hereinafter, with reference to the drawings, a wiring structure according to an embodiment of the present invention and a light-emitting panel including the same will be described in detail. First, with reference to FIGS. 1 to 4, the light-emitting panel 1 according to this embodiment will be described. Here, FIG. 1 is a schematic perspective view of the light-emitting panel 1, FIG. 2 is a cross-sectional view taken along line A-A of the light-emitting panel 1 (wiring structure 20) (a cross-sectional view obtained by cutting the light-emitting panel 1 shown in FIG. 1 along line A-A), FIG. 3 is a diagram showing the optical path of light incident on the light-emitting panel 1 (wiring structure 20), and FIG. 4 is a cross-sectional view of the light-emitting panel 1 (wiring structure 30) according to a modified example.

[0020] As shown in FIG. 1, the light-emitting panel 1 according to this embodiment includes a light-emitting part 10 and a wiring structure 20. The light-emitting part 10 includes, for example, a transparent electrode substrate and light-emitting elements such as LEDs and OLEDs mounted on the transparent electrode substrate. Further, the transparent electrode substrate includes, for example, a substrate such as glass or a transparent polymer film (for example, a film such as PET, PC, PCT, PEN, PU, TPU, PI, or silicone resin), and a transparent conductive material (ITO, FTO, IZO, IZTO, ZnO, etc.) formed at a predetermined position on the surface of this substrate. However, the configuration of the light-emitting part 10 is not limited to this.

[0021] Next, as shown in FIGS. 1 and 2, the wiring structure 20 includes a wiring part 21, a transparent base part 22, and a high-refractive-index transparent part 23. Note that the wiring structure 20 according to this embodiment is for supplying power to the light-emitting part 10, but it may also be for supplying power to devices other than the light-emitting part 10 (for example, an ETC antenna module provided on the front glass of a vehicle, etc.).

[0022] As shown in FIG. 1, one end of the wiring part 21 is electrically connected to a power source (for example, an in-vehicle battery, etc.), and the other end is connected to the light-emitting part 10. Electric power from the power source is supplied to the light-emitting part 10 via the wiring part 21.

[0023] The configuration of the wiring portion 21 is not particularly limited. For example, it preferably includes a conducting wire located in the core portion of the wiring portion 21, a protective layer covering the conducting wire, and a light reflection layer (such as a metal thin film, etc.) formed on at least the outer peripheral surface of the protective layer. Thereby, the light that enters the high refractive index transparent portion 23 and reaches the wiring portion 21 is reflected, for example, on the incident side. Therefore, the light that reaches the wiring portion 21 is not emitted to the emission side of the high refractive index transparent portion 23.

[0024] Also, the transparent base portion 22 is a transparent member for supporting the light emitting portion 10 (in the case of this embodiment, embedding the light emitting portion 10). By the way, the light emitting panel 1 according to this embodiment can be applied, for example, as a vehicle window, various vehicle lamps, a sunroof, a rear view mirror provided in the vehicle, a traffic sign, a display, etc. Therefore, for example, when the light emitting panel 1 is applied as a vehicle window, the transparent base portion 22 corresponds to the window glass portion. Also, when the light emitting panel 1 is applied as various vehicle lamps, the transparent base portion 22 corresponds to the cover portion of the lamp exterior.

[0025] Also, as shown in FIG. 2, the high refractive index transparent portion 23 extends within the transparent base portion 22. Further, the aforementioned wiring portion 21 passes through the high refractive index transparent portion 23. The high refractive index transparent portion 23 of this embodiment is provided so as to surround the top, bottom, front, and back of the wiring portion 21.

[0026] Furthermore, the refractive index of the high refractive index transparent portion 23 is higher than the refractive index of the transparent base portion 22. Therefore, as shown in FIG. 3, the light L that enters the high refractive index transparent portion 23 at an incident angle larger than a predetermined critical angle is totally reflected at the interface between the high refractive index transparent portion 23 and the transparent base portion 22. Also, the totally reflected light L is emitted from the emission side of the high refractive index transparent portion 23.

[0027] Thereby, the shadow of the wiring portion 21 is less likely to be projected onto the emission side of the high refractive index transparent portion 23, and the presence of the wiring portion 21 is less conspicuous. Therefore, according to this embodiment, it is possible to provide the light emitting panel 1 (wiring structure 20) in which the power supply function to the light emitting portion 10 is appropriately ensured and the degree of freedom in design and design is not impaired.

[0028] Here, the materials of the high refractive index transparent part 23 and the transparent base part 22 are not particularly limited as long as the condition that the refractive index of the high refractive index transparent part is higher than the refractive index of the transparent base part 22 is satisfied. For example, as the high refractive index transparent part 23 and the transparent base part 22, there are acrylic polymers such as polytetrafluoroethylene and polymethyl methacrylate, polycarbonate, polyethylene terephthalate, polystyrene, silicone resin, epoxy resin, glass, etc. Among these, those with a high refractive index are used as the high refractive index transparent part 23. However, other materials may also be used.

[0029] Note that the high refractive index transparent part 23 of the wiring structure 20 shown in FIGS. 1 to 3 is a plate-like member, but the form of the high refractive index transparent part is not limited to this. For example, as shown in the high refractive index transparent part 33 (a modified example of this embodiment) in FIG. 4, in a cross-sectional view, a convex part may be formed upward at approximately the center of the upper surface 331, and a concave part may be formed downward at approximately the center of the bottom surface 332. Also, other forms may be possible.

[0030] [Manufacturing method of wiring structure] Next, with reference to FIGS. 5 to 7, the manufacturing method of the wiring structure 20 (light emitting panel 1) according to this embodiment will be described. Here, FIGS. 5 and 6 are diagrams for explaining the steps of the manufacturing method of the wiring structure 20. Also, FIG. 7 shows an example of the joining method of the first high refractive index transparent part 231 and the second high refractive index transparent part 232 sandwiching the wiring part 21 in the wiring structure 20.

[0031] First, as shown in FIG. 5(a), the wiring part 21 of the wiring structure 20 is connected to the light emitting part 10. Subsequently, as shown in FIG. 5(b), at least two high refractive index transparent parts 23 (the first high refractive index transparent part 231 and the second high refractive index transparent part 232) are arranged above and below the wiring part 21. Then, as shown in FIG. 5(c), the wiring part 21 is sandwiched (joined) by the first high refractive index transparent part 231 and the second high refractive index transparent part 232.

[0032] Next, as shown in FIG. 6(a), at least two transparent bases 22 (a first transparent base 221 and a second transparent base 222) are prepared. Then, as shown in FIG. 6(b), the light-emitting part 10 and the high-refractive-index transparent part 23 sandwiching the wiring part 21 are arranged at predetermined positions of the transparent base 22 (in the illustrated example, the light-emitting part 10 and the high-refractive-index transparent part 23 are arranged at predetermined positions on the upper side of the second transparent base 222). Finally, as shown in FIG. 6(c), the first transparent base 221 and the second transparent base 222 are joined, and the light-emitting part 10 and the high-refractive-index transparent part 23 are housed in the transparent base 22. According to this method, the wiring structure 20 and the light-emitting panel 1 can be manufactured simply.

[0033] Also, as shown in FIG. 7, when joining the first high-refractive-index transparent part 231 and the second high-refractive-index transparent part 232 with the wiring part 21 sandwiched therebetween, the first high-refractive-index transparent part 231 and the second high-refractive-index transparent part 232 may be crimped using rollers 41 and 42 (crimping means). Thereby, the first high-refractive-index transparent part 231 and the second high-refractive-index transparent part 232 can be joined more firmly.

Example

[0034] In the wiring structure 20 described above, specific examples of implementation are shown below. However, the present invention is not limited and restricted by the following examples.

[0035] As shown in FIG. 8, a plurality of light sources 51 for reproducing pseudo-natural light are arranged vertically at predetermined positions on the incident side of the wiring structure 20 (five light sources 51 are arranged at intervals of 5 mm), and a screen is arranged on the emission side of the wiring structure 20, and the results of a simulation test of the screen projection image when the wiring structure 20 is irradiated with the light sources 51 are shown.

[0036] Here, in this simulation test, the thickness 23T of the high-refractive-index transparent portion 23 is changed. More specifically, a sample with a thickness 23T of the high-refractive-index transparent portion 23 of 9 mm corresponds to Example 1, a sample with a thickness 23T of the high-refractive-index transparent portion 23 of 7 mm corresponds to Example 2, a sample with a thickness 23T of the high-refractive-index transparent portion 23 of 5 mm corresponds to Example 3, and a sample with a thickness 23T of the high-refractive-index transparent portion 23 of 3 mm corresponds to Example 4.

[0037] Incidentally, as a result of conducting a similar simulation test on a conventional wiring structure (a wiring structure not provided with the high-refractive-index transparent portion 23), as shown in FIG. 9, a rectangular image (shadow) 21P corresponding to the wiring portion 21 was clearly projected onto the screen within the image 511 of the light source 51.

[0038] On the other hand, as shown in FIG. 10, in any of the test results regarding Example 1 to Example 4, the rectangular image corresponding to the wiring portion 21 was not projected. In particular, regarding Example 1 (a sample with a thickness 23T of the high-refractive-index transparent portion 23 of 9 mm), not only the rectangular image of the wiring portion 21 but also a cut-like image that divides the image 511 of the light source 51 did not occur at the corresponding portion 211 of the wiring portion 21.

[0039] On the other hand, regarding Example 2 to Example 4 (samples having a high-refractive-index transparent portion 23 thinner than Example 1), a cut-like image that divides the image 511 of the light source 51 vertically occurred at the corresponding portion 211 of the wiring portion 21. From this, it was suggested that by adjusting the thickness 23T of the high-refractive-index transparent portion 23 to, for example, 9 mm or more, the wiring portion 21 can be made less conspicuous.

[0040] The embodiments of the present invention have been described in detail above. However, the above description is for facilitating the understanding of the present invention and is not described for the purpose of limiting the present invention. The present invention may include those that can be changed and improved without departing from the gist thereof. Also, equivalents of the present invention are included therein.

Explanation of Reference Numerals

[0041] 1... Light-emitting panel 10… Light-emitting part 20, 30… Wiring structure 21, 31… Wiring part 22, 32… Transparent base 23, 33… High-refractive-index transparent part

Claims

1. A light-emitting panel comprising a light-emitting portion and a wiring structure for supplying power to the light-emitting portion, wherein the wiring structure includes a wiring portion, a plate-shaped transparent base for supporting the light-emitting panel, and a high-refractive-index transparent portion that extends within the transparent base and has a higher refractive index than the transparent base, the wiring portion is provided through the high-refractive-index transparent portion, and an interface between the high-refractive-index transparent portion and the transparent base is formed such that light incident on the high-refractive-index transparent portion at an incident angle greater than a predetermined critical angle from one surface side of the plate-shaped transparent base is totally reflected and exits from the other surface side of the plate-shaped transparent base. A light-emitting panel characterized by the above.

2. The wiring portion has a rectangular shape in which a length in a direction from one surface side to the other surface side of the wiring portion is shorter than a length in a direction orthogonal to the direction. The light-emitting panel according to Claim 1.

3. The high-refractive-index transparent portion has a plate shape or a shape with a convex portion formed at a central portion of a cross section in a cross-sectional view. The light-emitting panel according to Claim 1 or 2.

4. The outer peripheral surface of the wiring portion has a light-reflecting layer. The light-emitting panel according to any one of Claims 1 to 3.

5. A method for manufacturing the light-emitting panel according to Claim 1, the method including a step of connecting the light-emitting portion and the wiring portion, a step of manufacturing the high-refractive-index transparent portion by arranging at least two resin-made high-refractive-index transparent members to face each other with the wiring portion connected to the light-emitting portion therebetween and then pressing the at least two high-refractive-index transparent members using a predetermined pressing means, and a step of joining the high-refractive-index transparent portion and the transparent base. A method for manufacturing a light-emitting panel.

Images