JP7111520B2 - light emitting display - Google Patents

Description

The present disclosure relates to light emitting display devices.

2. Description of the Related Art Conventionally, a display device is known that is provided in the center of a front grill of a vehicle and functions as an emblem that displays the name of the vehicle or the manufacturer. The display device described in Patent Document 1 is composed of a display-side light guide provided on the front side of a vehicle having a radar device that transmits and receives radio waves such as millimeter waves, and a back-side light guide provided on the rear side of the vehicle. there is

JP 2017-074818 A

In the configuration of Patent Document 1, since both the display-side light guide and the back-side light guide are transparent, there is a risk that structures inside the vehicle can be seen from the outside of the vehicle. A light shielding layer is sometimes formed so that structures inside the vehicle are not visible. However, in order to form the light shielding layer, it is necessary to add a manufacturing process such as coating.

An object of the present disclosure is to provide a light-emitting display device that has a simple configuration, can transmit radio waves, and has an improved appearance.

A light-emitting display device of the present disclosure is provided in a vehicle (1) having a radar device (4). The light-emitting display device comprises a substrate (20), a transparent member (30), a metal layer (50) and light sources (60, 260).

The base material is made of resin, can transmit radio waves, and can block light.
The transparent member has a light-emitting portion (35) that can diffusely reflect light, is formed outside the vehicle relative to the base material, and can transmit radio waves and light .
The metal layer is formed between the substrate and the transparent member and is permeable to radio waves.
A light source is provided outside the substrate and the transparent member. Also, the light source is provided so that when it emits light, the light passes through the transparent member, the light that has passed through the transparent member is diffusely reflected by the light emitting portion, and the light emitting portion emits light.
The light-emitting portion includes an uneven portion (36) formed on the transparent member on the substrate side.
The substrate has a substrate protrusion (21) extending toward the transparent member. The metal layer is formed between the top surface of the substrate excluding the side surfaces and the transparent member.

The substrate obscures the visibility of structures inside the vehicle. In addition, the range to be illuminated can be set by the light emitting portion of the transparent member. Therefore, the structure is simple and the appearance is improved.

1 is a configuration diagram of a vehicle in which a light-emitting display device according to the present embodiment is used; FIG. FIG. 2 is an enlarged view of part II of FIG. 1; FIG. 3 is a cross-sectional view taken along line III-III of FIG. 2; The IV part enlarged view of FIG. 1 is a perspective view of a light-emitting display device according to a first embodiment; FIG. FIG. 4 is a partial cross-sectional view for explaining the path of light when the light source of the light-emitting display device according to the first embodiment emits light; FIG. 4 is a partial cross-sectional view of a light-emitting display device according to a second embodiment; FIG. 10 is a partial cross-sectional view for explaining the path of light when the light source of the light-emitting display device according to the second embodiment emits light; FIG. 4 is a perspective view of a light emitting display device according to another embodiment; FIG. 10 is a partial cross-sectional view of a light-emitting display device according to another embodiment; FIG. 10 is a partial cross-sectional view of a light-emitting display device according to another embodiment; FIG. 10 is a partial cross-sectional view of a light-emitting display device according to another embodiment; FIG. 10 is a partial cross-sectional view of a light-emitting display device according to another embodiment; FIG. 10 is a partial cross-sectional view of a light-emitting display device according to another embodiment; FIG. 10 is a partial cross-sectional view of a light-emitting display device according to another embodiment; FIG. 10 is a partial cross-sectional view of a light-emitting display device according to another embodiment; FIG. 10 is a partial cross-sectional view of a light-emitting display device according to another embodiment; FIG. 10 is a partial cross-sectional view of a light-emitting display device according to another embodiment; FIG. 3 is a cross-sectional view of a light-emitting display device of a comparative example;

Embodiments of the light-emitting display device will be described below with reference to the drawings. In a plurality of embodiments, substantially the same configuration will be described with the same reference numerals. Further, the term "this embodiment" encompasses a plurality of embodiments. The light-emitting display device of this embodiment is used in a vehicle having a radar device.

First, the vehicle 1 used for the resin molding of this embodiment will be described. The forward direction of the vehicle 1 is defined as "forward". Let the backward direction of the vehicle 1 be "rear". Also, the upper side when viewed from the forward direction is defined as "upper". The lower side when viewed from the forward direction is referred to as "lower". The vertical direction and the vehicle height direction, which is the height direction of the vehicle 1, are the same. Furthermore, the right side as viewed from the forward direction is defined as "right". The left side as viewed from the forward direction is defined as "left". The lateral direction is the same as the width direction of the vehicle 1 .

As shown in FIG. 1, the vehicle 1 includes a light-emitting display device 11 and a radiator grille 2. As shown in FIG. The light-emitting display device 11 is provided on the front side of the radiator grille 2 . Headlights 3 are provided on the left and right sides of the vehicle 1 , and the radiator grille 2 is provided between the headlights 3 .

As shown in FIGS. 2 and 3 , vehicle 1 further includes a radar device 4 . The radar device 4 is formed on the rear side of the radiator grille 2 . In the figure, the radar device 4 transmits and receives radio waves that pass through areas indicated by dashed lines α and β. For radio waves, for example, millimeter waves are used.

Radar device 4 measures the distance, angle and relative speed from vehicle 1 to a target by transmitting and receiving radio waves. The distance from the vehicle 1 to the target is measured from the time difference between the transmission and reception extracted by correlating the amplitude, frequency or phase of the transmitted signal with the received signal by applying suitable modulation. The angle from the vehicle 1 to the target is measured by scanning the radio waves, limiting the transmission and reception of radio waves to a limited azimuth. The relative velocity from the vehicle 1 to the target is measured by extracting the frequency shift occurring in the reflected radio waves due to the Doppler effect.

(First embodiment)
As shown in FIGS. 2 to 4, the light-emitting display device 11 includes a substrate 20, a transparent member 30, a first light guide portion 31, a second light guide portion 32, a cover portion 34, a metal layer 50, and a light source 60. . In the cross-sectional view, the transparent member 30, the first light guide section 31 and the second light guide section 32 are shown in white in order to clarify the location of each part.

The base material 20 is formed in an elliptical plate shape. The base material 20 is provided inside the vehicle 1, that is, on the radar device 4 side or the rear side, and is made of resin. Further, the base material 20 can transmit radio waves and block light. The base material 20 contains, for example, dark-colored ink or the like, and contains a material having a relatively small amount of light transmission and a relatively small dielectric loss tangent. If the dielectric loss tangent is relatively small, the amount of radio wave transmission is large.

Further, the base material 20 has a base material protrusion 21 extending toward the transparent member 30 . The base convex portion 21 is formed so as to display the car name, manufacturer, or the like.

The transparent member 30 is formed so as to correspond to the shape of the base material 20 and is connected to the base material 20 . The transparent member 30 is formed outside the base material 20 of the vehicle 1 , that is, on the side opposite to or in front of the radar device 4 . Also, the transparent member 30 is made of resin and can transmit radio waves and light. The transparent member 30 includes polycarbonate, polymethyl methacrylate, or the like, and includes a material that transmits a relatively large amount of light and has a relatively small dielectric loss tangent.

Also, the transparent member 30 has a light emitting portion 35 . The light-emitting portion 35 is formed on the end surface of the transparent member 30 on the side of the substrate 20 and includes fine uneven portions 36 . The uneven portion 36 is formed at a location other than the metal layer 50 . In the drawing, the uneven portion 36 is exaggerated for clarity. Note that the light-emitting portion 35 is not limited to fine unevenness, and may include only concave portions or only convex portions. The base material 20 is formed so as to be engageable with the uneven portion 36 . When light is transmitted through the transparent member 30 , the light is irregularly reflected by the concave-convex portion 36 . Light is diffusely reflected by the uneven portion 36, so that the light emitting portion 35 appears to emit light.

The first light guide portion 31 extends in a direction along a transparent portion outer surface 303 that is the outer surface of the transparent member 30 . The first light guide section 31 contains the same material as the transparent member 30 . The first light guide portion 31 is separated from the transparent member 30 , and is located between one end portion 311 of the first light guide portion 31 on the side of the transparent member 30 and the transparent member end portion 301 that is the end portion of the transparent member 30 . , a transparent body gap 37 is formed. The first light guide section 31 also has a reflecting surface 33 . The outer surface of the first light guide portion 31 extending in the direction along the transparent portion outer surface 303 is referred to as a first light guide portion outer surface 313 .

The reflecting surface 33 is formed on the other end portion 312 of the first light guide portion 31 opposite to the transparent member 30 . The reflective surface 33 is connected to the first light guide portion outer surface 313, is formed to be inclined with respect to the transparent portion outer surface 303 and the first light guide portion outer surface 313, and can reflect light.

The second light guide portion 32 is connected to the other end portion 312 of the first light guide portion 31 and extends in a direction crossing the direction in which the first light guide portion 31 extends. The second light guide portion 32 extends inside the vehicle 1 and extends rearward. The second light guide section 32 includes the same material as the transparent member 30 and the first light guide section 31 . The first light guide portion 31 and the second light guide portion 32 are integrally formed. The outer surface of the second light guide portion 32 connected to the reflecting surface 33 is referred to as a second light guide portion outer surface 323 .

As shown in FIG. 5 , the first light guide portion 31 and the second light guide portion 32 extend along the circumferential direction of the base material 20 or the transparent member 30 . In FIG. 5, description of the cover portion 34 and the light source 60 is omitted in order to clarify the location of the first light guide portion 31 and the second light guide portion 32 .

Returning to FIG. 4 , the cover portion 34 is formed so as to cover the first light guide portion outer surface 313 and the second light guide portion outer surface 323 . Also, the cover portion 34 is separated from the first light guide portion 31 and the second light guide portion 32 . A first cover gap 41 is formed between the cover inner surface 344 , which is the inner surface of the cover portion 34 , and the first light guide portion outer surface 313 . A second cover gap 42 is formed between the cover inner surface 344 and the second light guide portion outer surface 323 .

Also, the cover portion 34 extends along the circumferential direction of the base material 20 or the transparent member 30 in the same manner as the first light guide portion 31 and the second light guide portion 32 . The cover portion 34 is made of a material that transmits a relatively small amount of light, and can block light. The cover portion 34 prevents the first light guide portion 31 and the second light guide portion 32 from being seen from the outside of the vehicle 1 .

The metal layer 50 is formed between the base material 20 and the transparent member 30 and can transmit radio waves and light. The metal layer 50 is formed by depositing a metal such as indium (In) or tin (Sn) on the base convex portion 21 or the transparent member 30 at the base convex portion 21 by vapor deposition, sputtering, coating, or the like. there is Note that the metal layer 50 may be formed on the surface of the base material 20 at a position different from the base material protrusions 21 . The metal layer 50 displays the car name, manufacturer, or the like. In this embodiment, the metal layer 50 is displayed as “SR”. It should be noted that the display shown on the light-emitting display device 11 is not limited to the characters "SR", and may be various characters or figures.

The light source 60 is an LED or the like, and emits light when power is supplied. The light sources 60 are provided outside the base material 20 and the transparent member 30 , and are provided in plurality at the end portion 322 of the second light guide portion 32 opposite to the first light guide portion 31 . Further, the light sources 60 are provided so as to be equally spaced in the circumferential direction of the base material 20 and the transparent member 30 . In this specification, "equal to" shall include a common-sense error range.

As shown in FIG. 6 , when the light source 60 emits light, the emitted light passes through the second light guide section 32 . The light transmitted through the second light guide section 32 is reflected by the reflecting surface 33 . The light reflected by the reflecting surface 33 passes through the transparent member 30 via the first light guide section 31 . The light transmitted through the transparent member 30 is irregularly reflected by the uneven portion 36 . Light is irregularly reflected by the uneven portion 36, and the light emitting portion 35 emits light. In the figure, the path of the light emitted by the light source 60 is indicated by a dashed line γ.

As shown in FIG. 19 , the light emitting display device 90 of the comparative example includes a display side light guide 91 , a back side light guide 92 , a design layer 93 , a first light shielding layer 94 and a second light shielding layer 95 . The display-side light guide 91 is formed on the front side of the vehicle 1, is transparent, and can transmit radio waves and light. The rear light guide 92 is formed on the rear side of the vehicle 1, is transparent, and can transmit radio waves and light. The design layer 93 is between the display-side light guide 91 and the back-side light guide 92 and is made of metal to display the vehicle name, manufacturer, or the like. In the figure, the display side light guide 91 and the back side light guide 92 are described in white.

In the light-emitting display device 90, both the display-side light guide 91 and the back-side light guide 92 are transparent, and the vicinity of the design layer 93 is not shielded from light. be. Therefore, the second light shielding layer 95 may be formed so that the structures inside the vehicle 1 are not visible. However, in order to form the second light shielding layer 95, it is necessary to add a manufacturing process such as painting. The light-emitting display device 11 of the present embodiment has a simple structure, can transmit radio waves, and has an improved appearance.

[1] The light source 60 is provided outside the base material 20 and the transparent member 30 . The base material 20 can transmit radio waves and block light. The transparent member 30 has a light-emitting portion 35 that can diffusely reflect light, and can transmit radio waves and light. The substrate 20 makes the structures inside the vehicle 1 invisible. In addition, the range to be illuminated can be set by the light emitting section 35 . Therefore, the structure is simple and the appearance is improved. Furthermore, since the substrate 20 blocks light, there is no need to add a manufacturing process such as painting. This simplifies the manufacture of the light-emitting display device 11 .

[2] Light emitted by the light source 60 passes through the transparent member 30 via the second light guide section 32 , the reflecting surface 33 and the first light guide section 31 . As a result, the light emitted from the light source 60 can be easily converged and transmitted through the transparent member 30, and the light emitting section 35 can easily emit light uniformly. In this specification, the term “uniform” means that the luminance or illuminance of light has little variation.

[3] The first light guide portion 31 and the second light guide portion 32 extend in the circumferential direction of the transparent member 30 . As a result, when the light source 60 emits light, the light transmitted through the second light guide section 32 via the reflecting surface 33, the first light guide section 31, and the transparent member 30 is uniformly introduced into the light emitting section 35. easier to be This makes it easier for the light emitting section 35 to emit light more uniformly.

[4] The first light guide portion 31 and the second light guide portion 32 are formed separately from the transparent member 30 and the cover portion 34 . This makes it easier to manufacture the substrate 20 , the transparent member 30 , the first light guide section 31 and the second light guide section 32 .

(Second embodiment)
The light-emitting display device of the second embodiment does not include the first light guide section and the second light guide section, but includes the light source support section. Also, the light-emitting display device of the second embodiment is the same as that of the first embodiment, except that the arrangement of the light sources is different.

As shown in FIG. 7, the light source 260 of the light-emitting display device 12 of the second embodiment is provided so as to face the end portion 301 of the transparent member. A line extending in the direction along the transparent member 30 is assumed to be a virtual line Li. The light source 260 is provided on the virtual line Li.

The light source support section 38 can be connected to the light source 260 and the vehicle 1 and can support and reinforce the light source 260 . The light source support portion 38 has a first extension portion 381 and a second extension portion 382 . The first extension 381 is connected to the light source 260 and extends rearward. The second extension 382 extends in the left-right direction from the end of the first extension 381 . The light source support portion 38 is formed to have an L-shaped cross section.

Cover portion 234 is provided to cover light source 260 and light source support portion 38 . The cover portion 234 prevents the light source 260 and the light source support portion 38 from being seen from the outside of the vehicle 1 . Also, the cover portion 234 is separated from the light source 260 . A third gap 43 is formed between the cover inner surface 344 and one end surface of the light source 260 .

As shown in FIG. 8 , when the light source 260 emits light, the emitted light passes through the transparent member 30 . The light transmitted through the transparent member 30 is irregularly reflected by the uneven portion 36 . Light is irregularly reflected by the uneven portion 36, and the light emitting portion 35 emits light. In the figure, the path of light emitted by the light source 260 is indicated by a dashed line γ. Also in the second embodiment, the same effect as [1] described in the first embodiment is obtained.

(Other embodiments)
[i] The substrate and the transparent member are not limited to elliptical shapes, and may be circular or polygonal. Also, an intermediate layer may be formed between the substrate and the transparent member in order to improve moldability.

[ii] As shown in FIG. 9, the first light guide portion 31 and the second light guide portion 32 may be formed in a rod shape, or may be provided in plurality. Also, the plurality of first light guide portions 31 and second light guide portions 32 may be provided so as to be arranged in parallel with each other in the circumferential direction of the base material 20 and the transparent member 30 based on a figure to be illuminated. This configuration facilitates manufacturing, reduces the weight of the light-emitting display device 11, and improves the versatility of the light-emitting display device 11. FIG.

Other embodiments that share the first embodiment are described below.

[iii] As shown in FIG. 10, the first light guide portion 31 and the cover portion 34 may be connected by welding or bonding the first light guide portion outer surface 313 and the cover inner surface 344 together. The second light guide portion 32 and the cover portion 34 may be connected by welding or bonding the second light guide portion outer surface 323 and the cover inner surface 344 together.

[iv] As shown in FIG. 11 , the second light guide portion 32 may extend forward from the other end portion 312 of the first light guide portion 31 . At this time, the second light guide portion 32 and the cover portion 34 are connected by welding or bonding the second light guide portion outer surface 323 and the cover inner surface 344 together. A space 44 is formed between the second light guide portion 32 and the cover portion 34 . The light source 60 is covered by the second light guide portion 32 and the cover portion 34 and provided in the space 44 .

[v] As shown in FIG. 12, the transparent member 30 and the first light guide portion 31 are connected by welding or bonding the transparent member end portion 301 and the one end portion 311 of the first light guide portion 31 together. may be The transparent member 30 and the first light guide section 31 have recesses and protrusions corresponding to each other, and may be welded or adhered while being engaged with each other.

[vi] As shown in FIG. 13, the base material 20 and the first light guide section 31 are welded or bonded to the base material end portion 201, which is the end of the base material, and the one end portion 311 of the first light guide section 31. may be connected by being equal. At this time, the base material end portion 201 protrudes outward from the transparent member end portion 301, and the surface of the base material end portion 201 on the side of the transparent member 30 and the surface of the first light guide portion 31 are connected. . By connecting the first light guide portion 31 to the base material 20 , the transparent member 30 or the cover portion 34 , assembly of the light-emitting display device 11 is facilitated.

[vii] As shown in FIG. 14, the transparent member 30, the first light guide section 31 and the second light guide section 32 may be formed integrally. This makes it easier to mold the transparent member 30, the first light guide portion 31 and the second light guide portion 32, and simplifies the manufacture of the transparent member 30, the first light guide portion 31 and the second light guide portion 32. .

[viii] As shown in FIG. 15, the light-emitting portion 35 may be formed on the end surface of the transparent member 30 located near the metal layer 50 . In this case, the fine concave-convex portion 36 of the light emitting portion 35 is formed so as to be positioned near the metal layer 50 . In FIG. 15 , the uneven portion 36 is exaggerated in order to clarify the location of the uneven portion 36 .

[ix] As shown in FIG. It may have four light guiding portions 334 and a third reflecting surface 433, or may have a plurality of light guiding portions and reflecting surfaces. The first light guide portion 331, the second light guide portion 332 and the first reflective surface 431 are the same as the first light guide portion 31, the second light guide portion 32 and the reflective surface 33 of the first embodiment. The first light guide portion 331, the second light guide portion 332, the third light guide portion 333 and the fourth light guide portion 334 are integrally formed. The third light guide section 333 and the fourth light guide section 334 contain the same material as the transparent member 30 .

The third light guide portion 333 is connected to the end of the second light guide portion 332 and extends in a direction crossing the direction in which the second light guide portion 332 extends. The second reflecting surface 432 is connected to the second light guide outer surface 323 and can reflect light. The fourth light guide portion 334 is connected to the end portion of the third light guide portion 333 and extends in a direction crossing the direction in which the third light guide portion 333 extends. The third reflecting surface 433 is connected to the outer surface of the third light guide section 333 and can reflect light. The light source 60 is provided at the end of the fourth light guide section 334 .

When the light source 60 emits light, the emitted light passes through the fourth light guide section 334 . The light transmitted through the fourth light guide section 334 is reflected by the third reflecting surface 433 . The light reflected by the third reflecting surface 433 passes through the third light guide section 333 and is reflected by the second reflecting surface 432 . The light reflected by the second reflecting surface 432 passes through the second light guide section 332 and is reflected by the first reflecting surface 431 . The light reflected by the first reflecting surface 431 passes through the transparent member 30 via the first light guide section 331 . The light transmitted through the transparent member 30 is irregularly reflected by the uneven portion 36 . Light is irregularly reflected by the uneven portion 36, and the light emitting portion 35 emits light.

[x] As shown in FIG. 17 , the transparent member 30 may have a transparent convex portion 39 extending toward the substrate 20 . The transparent protrusions 39 are formed so as to face the substrate 20 . At this time, the first light guide portion 31 is provided so as to face the transparent convex portion 39 . Moreover, the transparent convex portion 39 is formed so as to engage with the base material 20 . Furthermore, the transparent convex portion 39 has an inclined surface. The reflective surface 33 and the inclined surfaces of the transparent convex portion 39 are adjusted so that the light passing through the first light guide portion 31 is guided to the center of the transparent member 30 .

Other embodiments that share the second embodiment are described below.

[xi] As shown in FIG. 18 , in the light-emitting display device 12 , the light source 260 may be fixed to the cover section 234 . The light source 260 is provided such that the outer surface of the housing of the light source 260 and the inner surface 344 of the cover are connected. Note that the light source support portion 38 may be connected to the cover portion 234 .

As described above, the present disclosure is not limited to such embodiments, and can be embodied in various forms without departing from the scope of the present disclosure.

1 ... vehicle,
4 ... radar device,
11, 12 ... light-emitting display device,
20 ... base material,
30 ... transparent member,
35 ... light-emitting part,
50... metal layer,
60, 260 . . . light source.

Claims (7)

A light-emitting display device (11, 12) provided in a vehicle (1) having a radar device (4),
a base material (20) made of resin, capable of transmitting radio waves and capable of blocking light;
a transparent member (30) having a light-emitting portion (35) capable of diffusely reflecting light, formed outside the vehicle relative to the base material, and capable of transmitting radio waves and light;
a metal layer (50) formed between the base material and the transparent member and capable of transmitting radio waves;
Outside the base material and the transparent member , when light is emitted, the light is transmitted through the transparent member, the light transmitted through the transparent member is irregularly reflected by the light emitting section, and the light emitting section emits light. , a light source (60, 260) provided;
with
The light emitting part includes an uneven part (36) formed on the transparent member on the base material side,
The base material has base material projections (21) extending toward the transparent member, and the metal layer is formed between the top surface of the base material projections excluding the side surfaces and the transparent member. Luminescent display device. The outer surface (303) of the transparent member has a reflective surface (33) which is inclined with respect to the outer surface of the transparent member and is formed at the end (312) opposite to the transparent member and capable of reflecting light. ), a first light guide portion (31) capable of transmitting light;
It is connected to the end (312) of the first light guide section opposite to the transparent member, extends in a direction crossing the direction in which the first light guide section extends, and is capable of transmitting light. a second light guide portion (32);
a cover portion (34) formed to cover the outer surface (313) of the first light guide portion and the outer surface (323) of the second light guide portion and capable of blocking light;
further comprising
When the light source emits light, it transmits through the second light guide section, the light transmitted through the second light guide section is reflected by the reflective surface, and the light reflected by the reflective surface is reflected by the first guide section. 2. The light-emitting display device according to claim 1 , provided so as to pass through said transparent member via an optical section. 3. The light emitting display according to claim 2 , wherein the first light guide portion and the second light guide portion extend in the circumferential direction of the transparent member, or are arranged in a plurality in the circumferential direction of the transparent member. Device. 4. The light-emitting display device according to claim 2 , wherein the first light guide section is formed separately from the transparent member and the cover section. 4. The light-emitting display device according to claim 2 , wherein the first light guide section is connected to the base material, the transparent member, or the cover section. 4. The light-emitting display device according to claim 2 , wherein the transparent member, the first light guide section and the second light guide section are integrally formed. The light source (260) is provided so as to face the transparent member,
a cover portion (234) covering the light source;
a light source support (38) capable of supporting the light source;
The light-emitting display device of claim 1 , further comprising:

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