JP4981862B2 - Luminescent display device - Google Patents

Description

  The present invention relates to a light-emitting display device for an emblem provided in a vehicle such as an automobile.

  In order to make it possible to visually recognize an emblem provided on a vehicle such as an automobile even at night, there is a light emitting display device as disclosed in Patent Document 1, for example.

  The light-emitting display device disclosed in Patent Document 1 includes a first reflective layer, a light guide (referred to as “light guide main body” in the same document), and a second reflective layer (same as those in order from the mounting surface of the vehicle). In the literature, it is referred to as a “light-shielding layer”), and further includes a light source for supplying light to the light guide. Light emitted from the light source passes through the light guide while being repeatedly reflected between the first reflective layer and the second reflective layer, and leaks from a part of the light guide exposed in the vicinity of the edge of the emblem. As a result, the emblem is bordered by light leaking from the vicinity of the edge, and at night, the emblem appears to float in the air.

Japanese Patent No. 4261378

  By the way, when the conventional light-emitting display device including the light-emitting display device disclosed in Patent Document 1 is observed from a place not far away at night, the outline of the emblem appears blurred, and the characters and figures constituting the emblem , It may be difficult to visually recognize symbols and the like. Since the emblem is installed in the vehicle for the purpose of showing it to the people around it, it is not preferable that the outline of the emblem is blurred and its configuration is not easily recognized.

  The present invention has been made in view of such circumstances, and an object thereof is to provide a light-emitting display device that can be illuminated so that the outline of an emblem becomes clear.

As means for solving the above-described problems, the light-emitting display device of the present invention is configured as follows. That is, the light-emitting display device of the present invention is provided between the first reflective layer, the second reflective layer provided on the front side of the first reflective layer, and the first reflective layer and the second reflective layer. A light guide, and an emblem provided on the front side of the light guide, wherein the light guide has an exposed portion exposed along an edge of the emblem, wherein the back side of the light guide, at a position along the edge of the emblem when viewed from the thickness direction, that is formed groove.

  According to the light emitting display device having such a configuration, a groove is formed on the back side of the light guide body at a position along the edge of the emblem when viewed from the thickness direction, so that leakage occurs from the vicinity of the edge of the emblem. The amount of light is increased, and the emblem is illuminated so that the outline of the emblem is clear.

Further, according to the light emitting display device of the present invention, the at the deepest portion of the groove, that has irregularities strip is formed extending along the longitudinal direction thereof.

  According to the light-emitting display device having such a configuration, the light leaking from the vicinity of the edge of the emblem becomes scattered light, which is further illuminated so that the outline of the emblem becomes clearer.

The light emitting display device of the present invention, that has a convex portion which the exposed portion is protruded to the front side along the edge of the emblem.

  According to the light-emitting display device having such a configuration, the light leaking from the convex portion is different in light quantity and light quality compared to the light leaking from the non-convex portion of the light guide, so that the outline of the emblem becomes clearer Illuminated.

Further, according to the light emitting display device of the present invention, the highest portion of the convex portion, that have uneven conditions are formed extending along the longitudinal direction thereof.

  According to the light emitting display device having such a configuration, the light leaking from the convex portion is scattered in the scattered direction, so that the outline of the emblem can be clearly illuminated with respect to viewpoints of various angles.

  According to the light emitting display device of the present invention, the emblem can be illuminated so that the outline of the emblem becomes clear.

It is a top view which shows an example of the light emission display apparatus which concerns on embodiment of this invention. It is AA sectional drawing of FIG. In addition, the hatching which shows the cross section of a light guide is abbreviate | omitted. (A) is the elements on larger scale of FIG. (B) And (c) is a fragmentary sectional view which shows the modification of the uneven | corrugated strip formed in the convex part. (D) And (e) is a fragmentary sectional view which shows the modification of the uneven | corrugated strip formed in the groove part. In all of (a) to (e), hatching indicating the cross section of the light guide is omitted. It is sectional drawing which shows an example of the light emission display apparatus which concerns on other Embodiment 1 of this invention. This corresponds to a cross-sectional view taken along line AA in FIG. In addition, the hatching which shows the cross section of a light guide is abbreviate | omitted. It is sectional drawing which shows an example of the light emission display apparatus which concerns on other Embodiment 2 of this invention. This corresponds to a cross-sectional view taken along line AA in FIG. In addition, the hatching which shows the cross section of a light guide is abbreviate | omitted.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a plan view showing an example of a light emitting display device according to an embodiment of the present invention. 2 is a cross-sectional view taken along the line AA in FIG. FIG. 3A is a partially enlarged view of FIG. In the present specification, the mounting surface side of the light emitting display device 1 to the vehicle (including not only the vehicle body but also members attached to the vehicle) is referred to as “back side” and the opposite side is referred to as “front side”. In other words, the side closer to the person viewing the emblem 2 is defined as “front side”.

  As shown in FIGS. 1 and 2, the light emitting display device 1 includes an emblem 2, a light guide 3, a first reflective layer 4, a second reflective layer 5, a light shielding layer 6, a light source 7, and the like.

  As shown in FIG. 1, the emblem 2 has an external part 2A provided on the outside and an internal part 2B provided in the external part 2A. For the emblem 2, for example, a synthetic resin having a surface plated with aluminum or the like is employed. In the present embodiment, a simple figure as shown in FIG. 1 will be described as an example of the emblem 2. However, the emblem 2 has various forms such as characters, figures, symbols, etc. other than those shown in FIG. It can be adopted. In the emblem 2 shown in FIG. 1, the outer portion 2A has an elliptical shape, and the inner portion 2B is installed in a straight line at the center of the outer portion 2A.

  The light guide 3 is formed of a light-transmitting material, for example, a synthetic resin such as a light-transmitting acrylic resin or polycarbonate resin, and is attached to the front side of the first reflective layer 4 described later with an adhesive (not shown). It is attached. The light guide 3 has an elliptical shape that is slightly larger than the external portion 2A of the emblem 2 when viewed from the front side in the thickness direction (hereinafter referred to as “plan view”).

  In addition, the light guide 3 has only a predetermined dimension S1 (see FIG. 1) in a direction orthogonal to the thickness direction of the light guide 3 (hereinafter referred to as “surface direction”) along the inner edge 2b of the emblem 2. It has an exposed exposed portion Z1 and an exposed portion Z2 exposed by a predetermined dimension S2 (see FIG. 1) in the surface direction from the outer edge 2a of the emblem 2.

  In addition, the light guide 3 has a recess at a substantially central position on the back side thereof, and the recess forms a cavity 9 for arranging the light source 7 together with the first reflective layer 4. Furthermore, the outer peripheral portion 3 </ b> A of the light guide 3 has a curved shape that swells in a direction away from the light source 7.

  In addition, the convex part 3a formed along the emblem 2 and the groove part 3b formed in the back side of the light guide 3 are demonstrated in detail later.

  The first reflective layer 4 is reflective to light. As this 1st reflective layer 4, the sheet | seat which has reflectivity is employable, for example. The first reflective layer 4 is attached to a mounting surface 10 of a vehicle such as an automobile (for example, a vehicle bonnet, a radiator grill, a tail end panel, etc.) by a mounting means (sticking means) such as a double-sided tape or an adhesive (not shown). (Paste). In addition, the 1st reflection layer 4 may be formed with things other than a sheet material, for example, a coating film.

  The second reflective layer 5 is also reflective to light. As the second reflective layer 5, for example, a reflective sheet can be used. The back side of the second reflective layer 5 is attached (attached) to a predetermined region of the light guide 3 by attachment means (attachment means) such as a double-sided tape and an adhesive (not shown). Here, the predetermined regions are regions 11 and 11 (see FIG. 1) surrounded by the outer portion 2A and the inner portion 2B. The second reflective layer 5 may also be formed of a coating film or the like. In addition, when a non-light-transmitting double-sided tape, an adhesive agent, etc. are employ | adopted as an attachment means, the said attachment means is a very small part of the back side of the 2nd reflective layer 5 so that reflection of light may be prevented as much as possible. It is desirable to apply or apply.

  The light shielding layer 6 is attached (attached) to the front side of the second reflective layer 5 by the attaching means (attaching means) such as an adhesive in the predetermined regions 11 and 11 described above. The light blocking layer 6 has a property of blocking light received from the light guide 3. Instead of the second reflective layer 5 and the light shielding layer 6, a sheet material made of a material having both light reflectivity and light shielding properties may be employed.

  When the emblem 2 does not have a light shielding property, the light shielding layer 6 may be provided between the emblem 2 and the second reflective layer. In addition, when the emblem 2 has both light shielding properties and reflectivity, the second reflective layer 5 between the emblem 2 and the light guide 3 may be omitted.

  As the light source 7, for example, a light emitter such as an LED is used. The light source 7 is disposed in the cavity 9, and a base 12 for causing the light source 7 to emit light is also accommodated in the cavity 9.

  The light guide 3 has the exposed portions Z1 and Z2 along the edges 2a and 2b of the emblem 2 as described above. The exposed portion Z <b> 1 is a convex portion 3 a that protrudes frontward along the inner edge 2 b of the emblem 2. Further, the exposed portion Z2 is a convex portion 3a partly projecting to the front side along the outer edge 2a of the emblem 2, and the remaining portion is the outer peripheral portion 3A described above. Needless to say, the convex portions 3a and 3a also have translucency.

  Although the protrusion height of the convex part 3a is not specifically limited, as shown in FIG. 2, it is desirable that the protrusion part 3a has a protrusion height higher than the second reflection layer 5, the light shielding layer 6 and the like. Moreover, as shown to Fig.3 (a), the uneven | corrugated strip 3aa extended along the longitudinal direction is formed in the convex part 3a. As shown in FIG. 3A, the uneven strip 3aa is preferably provided at the topmost portion of the convex portion 3a, but may be provided at a portion other than the topmost portion.

  Although the cross-sectional shape of the uneven | corrugated strip 3aa provided in the convex part 3a is a sawtooth shape as shown to Fig.3 (a), the cross-sectional shape is not limited to this. For example, as shown in FIG. 3B, the cross-sectional shape of the uneven strip 3aa is a cross-sectional shape in which a plurality of semicircles R are continuously arranged, or a slope L and an arc r as shown in FIG. And a cross-sectional shape in which and are arranged alternately and continuously. 3 (b) and 3 (c) are also preferably provided at the top of the convex portion 3a, but may be provided at a portion other than the top.

  On the back side of the light guide 3, a groove 3 b is formed at a position along the edges 2 a and 2 b of the emblem 2 in plan view. Therefore, the groove 3b is formed at a position where it can be seen to overlap the convex 3a when viewed in plan.

  For example, as shown in FIG. 3A, the groove 3 b has both side surfaces 3 b </ i> X and 3 b </ i> X rising from the back side of the light guide 3 to the front side in the thickness direction. Although the groove depth of the groove part 3b is not specifically limited, In the example illustrated in FIG. 2, it is about half the thickness of the light guide 3. On the deepest part of the groove 3b, an uneven strip 3ba extending along the longitudinal direction is formed. Although this uneven | corrugated strip 3ba is desirable to be provided in the deepest part of the groove part 3b, it may be provided in parts other than the deepest part.

  As shown in FIG. 3A, the cross-sectional shape of the uneven strip 3ba provided in the groove 3b is a sawtooth shape, but the cross-sectional shape is not limited to this. For example, as shown in FIG. 3D, the cross-sectional shape of the concavo-convex stripe 3ba is a cross-sectional shape in which a plurality of semicircles R are continuously arranged, or a slope L and an arc r as shown in FIG. The cross-sectional shape etc. which were continuously arranged alternately may be sufficient. 3D and 3E are preferably provided at the deepest portion of the groove 3b, but may be provided at a portion other than the deepest portion.

  In addition, when the emblem 2 is attached to the 2nd reflective layer 5 with the double-sided tape 14 as shown to Fig.3 (a), the double-sided tape 14 can be concealed by the convex part 3a.

  In the light emitting display device 1 configured as described above, when the light source 7 emits light, the light enters the light guide 3 from the cavity 9, and most of the light is reflected in the first reflective layer 4 and the second reflective layer 5. The light guide 3 travels along the direction in which the first and second reflective layers 4 and 5 extend, while reflecting between them. And it leaks outside from the convex part 3a and outer peripheral part 3A (exposed part Z1, Z2) of the light guide 3 in which the light shielding layer 6 and the emblem 2 are not provided. A part of the light emitted from the light emitter 7 does not hit the reflective layers 4 and 5 and leaks to the outside from the convex portions 3a and 3a formed along the edges 2b and 2b of the internal portion 2B.

  A part of the light emitted from the light source 7 passes through the groove 3b while leaking to the outside. A part of the light passing through the groove 3b is within the groove 3b from the side surface 3bX (the side closer to the light source 7) of the groove 3b, like the light passing through the paths indicated by arrows P1 and P3 in FIG. Get into the space. At this time, due to the difference in refractive index between the light guide 3 and air (gas) (here, the refractive index of the light guide 3 is greater than the refractive index of air), arrows P1 and P3 The light passing through the path shown is refracted so as to approach the side surface 3bX of the groove 3b. Thereafter, the light passing through the path indicated by the arrow P1 is reflected by the first reflective layer 4 and enters the light guide 3 again from the uneven strip 3ba formed in the groove 3b. On the other hand, the light passing through the path indicated by the arrow P3 also enters the light guide 3 again from the ridges 3ba.

  Thus, the light passing through the side surface 3bX of the groove portion 3b (the side surface closer to the light source 7) is refracted so as to approach the side surface 3bX of the groove portion 3b, and therefore in the thickness direction of the light guide 3, that is, in the drawing. It becomes easy to proceed in the direction of the convex portion 3a directly above the groove portion 3b. As a result, the amount of light leaking from the convex portion 3a is increased as compared with the case where there is no groove portion 3b, and the outline of the emblem 2 is clearly illuminated.

  In addition, part of the light emitted from the light source 7 passes through the uneven stripe 3ba formed in the groove 3b while leaking to the outside, and is scattered in a scattered direction, or irregular reflection is caused by the uneven stripe 3ba. For example, the light passing through the paths indicated by the arrows P1 and P3 described above scatters in a discrete direction when returning to the light guide 3 again after passing through the projections and recesses 3ba. Further, when the light passing through the path indicated by the arrow P2 in FIG. 3A reaches the concavo-convex ridge 3ba, a part of the light passes through the concavo-convex ridge 3ba, but the remaining part is irregularly reflected by the concavo-convex ridge 3ba. As a result, the light leaking from the convex portion 3a becomes scattered light, and the outline of the emblem 2 is clearly illuminated.

  Moreover, since the uneven | corrugated strip 3aa is provided also in the top part of the convex part 3a, when leaking outside from this uneven strip 3aa, light is scattered further in the direction of disperse | distributed. For this reason, the outline of the emblem 2 can be clearly illuminated with respect to viewpoints of various angles.

  Moreover, since the convex part 3a protrudes to the front side from the other part (outer peripheral part 3A) from which the light guide 3 leaks light, compared with the outer peripheral part 3A, light quantity and light quality (for example, the ratio of scattered light, etc.) ) Is different. As a result, the outline of the emblem 2 is illuminated so as to be clear.

<Other embodiment 1>
Although the best embodiment of the present invention has been described above, as another embodiment 1, a light emitting display device 1A as shown in FIG.

  That is, the light emitting display device 1A shown in FIG. 4 is obtained by omitting the groove 3b in the light emitting display device 1 according to the above-described embodiment. Also in the light emitting display device 1A, the light guide 3 includes the convex portions 3a protruding to the front side along the edges 2a and 2b of the emblem 2, so that the outline of the emblem 2 is illuminated.

  In addition, since the projection 3a is provided at the top of the convex portion 3a of the light guide 3, the light leaking from the convex portion 3a is scattered in the direction of disjoint. It can be illuminated so that the outline of the two becomes clear.

<Other embodiment 2>
Furthermore, as another embodiment 2, a certain effect can be obtained even in the light emitting display device 1B as shown in FIG.

  That is, the light-emitting display device 1B shown in FIG. 5 omits the convex portion 3a in the light-emitting display device 1 according to the above-described embodiment, and light is emitted from the light guide 3 by a predetermined width along the edge 2b of the emblem. The second reflection layer 5 and the light shielding layer 6 are excluded so as to leak out, and an exposed portion Z1 is provided in a part of the light guide 3. Also in such a light emitting display device 1B, since the groove 3b is provided at a position along the edges 2a and 2b of the emblem 2 in plan view, the amount of light leaking from the vicinity of the edges 2a and 2b of the emblem 2 is reduced. It is raised and illuminated so that the outline of the emblem 2 is clear.

  Further, since the groove 3b is formed with the ridges 3ba, the light leaking from the vicinity of the edges 2a, 2b of the emblem 2 can be used as scattered light, thereby further clarifying the outline of the emblem 2. Illuminated by.

<Other embodiment 3>
In the above-described embodiment, as shown in FIGS. 2 and 5, the groove 3 b formed on the back side of the light guide 3 is formed on the edges 2 a and 2 b of the internal portion 2 </ b> B of the emblem 2 in a plan view. Although not provided at the position along, the groove 3b may be provided also at the position. In this case, when the recess on the back side of the light guide 3 that forms the cavity 9 interferes with the position where the groove 3b is to be formed, the groove 3b is formed in the recess (the groove 3b is formed in the recess). The state is not shown.)

  The present invention can be applied to, for example, a light-emitting display device of an emblem attached to an automobile.

DESCRIPTION OF SYMBOLS 1 Light emitting display device 2 Emblem 2a, 2b Edge part 3 Light guide 3a Convex part 3aa Concavity and convexity 3b Groove part 3ba Concavity and convexity 4 1st reflection layer 5 2nd reflection layer Z1, Z2 Exposed part

Claims (1)

A first reflective layer;
A second reflective layer provided on the front side of the first reflective layer;
A light guide provided between the first reflective layer and the second reflective layer;
An emblem provided on the front side from the light guide;
A light emitting display device comprising:
The light guide has a convex portion that is exposed along the edge of the emblem and protrudes to the front side, and overlaps the convex portion on the back side of the light guide when viewed from the thickness direction. groove is formed in the visible Te position,
On the topmost part of the convex part, an uneven line extending along the longitudinal direction is formed,
The light emitting display device is characterized in that an uneven strip extending along the longitudinal direction is formed at the deepest portion of the groove portion .

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