JP4650190B2 - Luminescent display device - Google Patents

Description

  The present invention relates to a light emitting display device that is provided in a vehicle and in which a decorative body is illuminated by light from a light source.

In order to make it possible to visually recognize an emblem (decorative body) provided on a vehicle even at night, for example, a light emitting display device as disclosed in Patent Document 1 has been proposed. In the light emitting display device disclosed in Patent Document 1, a display unit is configured by disposing a plate-shaped emblem on the front side of a plate-shaped light guide unit, and light entering the display unit from a light source on the vehicle side is formed. It leaks out from the peripheral part of the light guide part in the direction crossing the thickness direction. As a result, the emblem is illuminated from the peripheral side, and the emblem can be visually recognized even at night.
JP 2005-215596 A

  However, the light-emitting display device disclosed in Patent Document 1 is configured to illuminate the emblem from the peripheral side with light leaked from the peripheral portion of the light guide portion, so that the emblem at the night is light and the emblem at night There is a risk that the visibility of will be insufficient.

  An object of this invention is to improve the visibility of the decoration body (emblem) at night.

The present invention is directed to a light-emitting display device that is provided in a vehicle and in which a decorative body is illuminated by light from a light source. The invention of claim 1 is directed to the light-emitting display device in which light from the light source is transmitted to the decorative body. Light guiding means is provided for making light enter the inside of the outer peripheral edge of the decorative body and directing the light that has entered the outer peripheral edge of the decorative body from the outer peripheral edge side to the center side of the decorative body. The means includes a plate-shaped light guide disposed on the back side of the decorative body, and the outer peripheral edge of the light guide and the outer peripheral edge of the decorative body are joined so as to transmit light, The light source is provided on the back side of the decorative body so that light can be projected into the light guide body, and light projected from the light source into the light guide body is in a direction intersecting with the thickness direction of the light guide body. and guided in the direction toward the outer peripheral edge side from the center side of the light guide, said instrumentation Body, with is formed by the material of the light transmissive, the light-transmitting decorative member is provided with a reflective portion, the front Symbol reflective portion, and a recess formed recess on the back side of the decorative body And a light reflecting layer that covers the wall surface on which the recess is formed, and is illuminated by light from the light source that has entered the outer peripheral edge of the decorative body by the light guide means, The light from the illuminated light source is reflected to the front of the decorative body by the reflecting portion, and the back surface of the decorative body is covered with a light-impermeable layer that cannot transmit light except for the light reflecting layer. It is characterized by that.

  A part of the light projected from the light source illuminates the reflection part from the outer peripheral edge side toward the center side inside the light-transmitting decorative body, and the light from the light source that illuminates the reflection part is reflected by the reflection part. Reflected forward of the decorative body. Therefore, the visibility of the decorative body at night is improved.

Also, light from the light source that has passed through the inside of transparently of decorative body is reflected to the front of the decorative body by the light reflecting layer. The configuration in which the reflective portion is provided on the back surface of the decorative body is advantageous for preventing foreign matter adhesion.

Further, the light -impermeable layer makes the back side of the decorative body invisible when viewed from the front side of the decorative body. This is effective in avoiding a decrease in the appearance of the decorative body during the daytime when the light source is not emitting light.

  Light projected from the light source provided on the back side of the decorative body into the light guide body travels from the light guide body to the decorative body at the outer peripheral edge portion of the light guide body and the outer peripheral edge portion of the decorative body. The structure in which the light from the light source is circulated at the outer peripheral edge of the light guide and the outer peripheral edge of the decorative body is advantageous for reducing the thickness of the light emitting display device.

  The present invention has an excellent function of improving the visibility of a decorative body at night.

Hereinafter, a first embodiment of the present invention will be described with reference to FIGS.
As shown in FIG. 1 (b), an ellipse-shaped decorative body 12 is fitted into an elliptical ring-shaped frame 11. An annular flange 13 is integrally formed on the back side of the outer peripheral edge 123 of the substrate portion 120 of the decorative body 12, and the inner periphery of the flange 13 is formed as a taper 14. The taper 14 has a shape that increases in diameter as the distance from the back surface 121 of the substrate portion 120 of the decorative body 12 increases. An elliptical plate-shaped light guide 15 is fitted on the back side of the decorative body 12. The outer periphery of the light guide 15 is formed in a taper 16. The taper 16 has a shape that decreases in diameter from the back surface 151 to the front surface 152 of the light guide 15. The taper 16 on the light guide 15 side and the taper 14 on the decorative body 12 side are joined, and a gap 17 is provided between the back surface 121 of the decorative body 12 and the front surface 152 of the light guide 15. .

  An oval plate-shaped shielding plate 18 is fitted into the frame 11 so as to be joined to the end surface 131 of the flange 13. The joining between the shielding plate 18 and the end surface 131 of the flange 13 prevents water from entering between the shielding plate 18 and the end surface 131 of the flange 13.

As shown in FIG. 3, a groove 19 is formed in the back surface 121 of the substrate portion 120 of the decorative body 12. In the example illustrated in FIGS. 3 and 1A, the groove 19 represents an annular mark.
As shown in FIGS. 2A and 2B, the side wall surfaces 191 and 192 and the bottom wall surface 193, which are the wall surfaces on which the grooves 19 are formed, are covered with a light reflecting layer 20 that reflects light. The light reflecting layer 20 is formed by evaporating, for example, aluminum or silver. The side wall surface 191 is formed as an inclined surface that is displaced from the side wall surface 192 side to the side wall surface 191 side in the width direction of the groove 19 as it goes from the front surface 122 to the back surface 121 of the substrate portion 120 of the decorative body 12. The side wall surface 192 is formed as an inclined surface that is displaced in the width direction of the groove 19 from the side wall surface 191 side to the side wall surface 192 side as it goes from the front surface 122 to the back surface 121. That is, the groove width between the side wall surfaces 191 and 192 increases as it goes from the front surface 122 to the back surface 121 of the substrate portion 120 of the decorative body 12.

  A part of the back surface 121 and the taper 14 excluding the groove 19 of the decorative body 12 is covered with a colored light-impermeable layer 21. The light-impermeable layer 21 is a layer that is formed by painting and cannot transmit light. The light-impermeable layer 21 makes the back side of the decorative body 12 invisible when viewed from the front side of the decorative body 12.

  As shown in FIGS. 1B and 3, a receiving groove 153 is formed in the back surface 151 of the light guide 15, and a pair of light sources 22 and 23 (for example, light emitting diodes) are connected in series to the receiving groove 153. And are arranged so that they are arranged back to back. The pair of light sources 22 and 23 are arranged on the long diameter of the elliptical plate-shaped light guide 15 (indicated by a line L in FIG. 1A). The light sources 22 and 23 are long diameter wires of the light guide 15. On L, the direction from the center side toward the outer peripheral edge side and the joint 24 of the tapers 14, 16 are directed.

  As shown in FIGS. 2A and 2B, the front surface 152 of the light guide 15 is covered with a reflective layer 25 that reflects light, and the back surface 151 of the light guide 15 excluding the accommodation groove 153 is The light is reflected by a reflective layer 26 that reflects light. The reflective layers 25 and 26 are formed by evaporating, for example, aluminum or silver. The inner peripheral edge 111 of the frame 11 protrudes into the inner region of the reflective layer 25 when viewed in the thickness direction of the decorative body 12.

  The frame 11, the decorative body 12, the light guide 15 and the shielding plate 18 are made of synthetic resin, and the decorative body 12 and the light guide 15 are formed of a light transmissive resin (for example, a transparent acrylic resin). . The frame 11 is colored so as not to transmit light. The taper 14 and the taper 16 are joined so as to be able to transmit light, and the joint 24 is a portion capable of transmitting light. The light-emitting display device including the frame 11, the decorative body 12, the light guide 15, the shielding plate 18, and the light sources 22 and 23 is attached to, for example, a radiator grill of an automobile.

  The light projected from the light source 22 travels straight and reaches the joint 24 of the tapers 14 and 16 or reaches the joint 24 while being reflected by the reflective layers 25 and 26. The light that reaches the joint 24 is transmitted through the joint 24. That is, the light from the light source 22 enters the flange 13 of the decorative body 12 from the outer peripheral edge 154 of the light guide 15. The light that has entered the flange 13 from the outer peripheral edge 154 of the light guide 15 is reflected from the boundary surface on the outer peripheral side of the flange 13 or from the boundary surface on the inner peripheral side of the frame 11. To the inside of the outer peripheral edge 123 of the substrate 120. The light that has entered the outer peripheral edge 123 of the substrate 120 from the outer peripheral edge 154 of the light guide 15 via the flange 13 of the decorative body 12 is transmitted from the outer peripheral edge 123 side of the substrate 120 to the substrate portion. Head toward the center of 120.

  An arrow R1 in FIG. 2A schematically shows the direction in which the light projected from the light source 22 into the light guide 15 travels through the light guide 15. The arrow Q1 indicates that light that has traveled from the outer peripheral edge 154 of the light guide 15 to the inside of the outer peripheral edge 123 of the substrate 120 via the flange 13 of the decorative body 12 passes through the substrate 120 of the decorative body 12. The direction of travel is shown schematically.

  The light traveling in the direction of the arrow Q1 in the substrate part 120 is a side wall surface 191 [hereinafter referred to as the light source 22] from the short diameter of the ellipsoidal decorative body 12 (indicated by the line S in FIG. 1A). The light reflecting layer 20 (hereinafter referred to as the light reflecting layer 201 and illustrated in FIG. 2A) covering the side wall surface 1911 and illustrated in FIG. 2A is illuminated. Further, the light traveling in the direction of the arrow Q1 in the substrate portion 120 covers the side wall surface 192 (hereinafter referred to as the side wall surface 1921 and illustrated in FIG. 2B) on the light source 23 side of the short diameter line S. The light reflecting layer 20 (hereinafter referred to as the light reflecting layer 202 and illustrated in FIG. 2B) is illuminated. The light from the light source 22 illuminating the light reflecting layers 201 and 202 is forward of the decorative body 12 by the light reflecting layers 201 and 202 [as shown by the arrow F in FIG. Direction to the side]. Here, the forward direction includes not only the direction indicated by the arrow F but also the diagonally forward direction inclined with respect to the arrow F.

  The light projected from the light source 23 travels in the light guide 15 in the direction opposite to the projection light from the light source 22, and goes around from the inside of the flange 13 to the inside of the substrate unit 120. The light from the light source 23 that has entered the outer peripheral edge 123 of the substrate 120 via the flange 13 of the decorative body 12 from the outer peripheral edge 154 of the light guide 15 is the outer peripheral edge 123 of the substrate 120. From the side toward the center side of the substrate part 120.

  The arrow R2 in FIG. 2B schematically shows the direction in which the light projected from the light source 23 travels in the light guide 15. The arrow Q2 indicates that light that has entered the outer peripheral edge 123 of the substrate 120 via the flange 13 of the decorative body 12 from the outer peripheral edge 154 of the light guide 15 passes through the substrate 120 of the decorative body 12. The direction of travel is shown schematically. That is, the reflection layers 25 and 26 provided on the front and back surfaces of the light guide 15 are configured so that the light projected from the light sources 22 and 23 intersects with the thickness direction of the light guide 15 and the central portion of the light guide 15. It leads to the direction which goes to the outer periphery part 154 side from the side. Then, the light projected from the light sources 22 and 23 into the light guide 15 is decorated from the outer peripheral edge 154 of the light guide 15 by the outer peripheral edge 154 of the light guide 15 and the flange 13 of the decorative body 12. 12 wrap around the outer peripheral edge 123.

  The light guide 15, the reflective layers 25 and 26, and the flange 13 allow light from the light sources 22 and 23 to enter the outer peripheral edge 123 of the decorative body 12 and enter the outer peripheral edge 123 of the decorative body 12. The light guide means for directing the light from the outer peripheral edge 123 side of the decorative body 12 toward the center side is configured.

  The light traveling in the direction of the arrow Q2 in the substrate part 120 is a side wall surface 191 [hereinafter referred to as the light source 23] from the short diameter of the ellipsoidal decorative body 12 (indicated by the line S in FIG. 1A). The light reflecting layer 20 (hereinafter referred to as the light reflecting layer 203 and illustrated in FIG. 2B) that illuminates the sidewall surface 1912 and illustrated in FIG. 2B is illuminated. Further, the light traveling in the direction of the arrow Q2 in the substrate portion 120 covers the side wall surface 192 (hereinafter referred to as the side wall surface 1922 and illustrated in FIG. 2A) on the light source 22 side of the short diameter line S. The light reflecting layer 20 (hereinafter referred to as the light reflecting layer 204 and illustrated in FIG. 2A) is illuminated. The light from the light source 23 that illuminates the light reflecting layers 203 and 204 is reflected forward of the decorative body 12 by the light reflecting layers 203 and 204.

The groove 19 and the light reflecting layer 20 constitute a reflecting portion 27 provided on the decorative body 12. The groove 19 is a recess that constitutes the reflecting portion 27.
In the first embodiment, the following effects can be obtained.

  (1) A part of the light projected from the light sources 22 and 23 illuminates the side wall surfaces 191 and 192 of the reflecting portion 27 from the outer peripheral edge 123 side toward the center side inside the light-transmitting decorative body 12. . Lights from the light sources 22 and 23 that illuminate the side wall surfaces 191 and 192 of the reflection unit 27 are reflected to the front of the decorative body 12 by the side wall surfaces 191 and 192 of the reflection unit 27. That is, the side wall surfaces 191 and 192 which are the wall surfaces on which the groove 19 representing the mark is formed reflect the projection light from the light sources 22 and 23 toward the front of the decorative body 12. Therefore, the mark applied to the decorative body 12 is clearly recognized by the reflected light from the side wall surfaces 191 and 192, and the mark applied to the decorative body 12 is clearly visible even at night. That is, the visibility of the decorative body 12 at night is improved.

(2) When water adheres to the reflecting portion 27 or the reflecting portion 27 is contaminated with dust, the reflected light from the side wall surfaces 191 and 192 is reduced and the visibility of the mark applied to the decorative body 12 is low. Turn.
The reflecting portion 27 is provided on the back surface 121 of the decorative body 12, and the gap 17 facing the reflecting portion 27 is sealed between the decorative body 12 and the shielding plate 18. Accordingly, foreign matter such as water and dust does not enter the gap 17, and water and dust do not adhere to the reflecting portion 27.

(3) If the back side of the decorative body 12 when viewed from the front side of the decorative body 12 can be seen through, the appearance of the decorative body 12 in the daytime when the light sources 22 and 23 do not emit light is reduced.
The back surface 121 of the decorative body 12 is covered with a light-impermeable layer 21 that cannot transmit light, except for the light-reflecting layer 20 that reflects light. The back side of the decorative body 12 when viewed from the front side of the decorative body 12 is invisible due to the colored light-impermeable layer 21. If the color of the light-impermeable layer 21 and the original color of the light-reflective layer 20 are different, the mark on the decorative body 12 represented by the light-reflective layer 20 can be seen in the daytime when the light sources 22 and 23 do not emit light. Is clearly visible. That is, the configuration in which the back side of the decorative body 12 when viewed from the front side of the decorative body 12 is invisible is effective in avoiding a decrease in the appearance of the decorative body 12 during the daytime when the light sources 22 and 23 are not emitting light.

  (4) The light projected from the light sources 22 and 23 into the light guide 15 is decorated from the outer peripheral edge 154 of the light guide 15 by the outer peripheral edge 154 of the light guide 15 and the flange 13 of the decorative body 12. It goes around into the outer peripheral edge 123 of the body 12. The configuration in which the light from the light sources 22 and 23 wraps around at the outer peripheral edge portion 154 of the light guide 15 and the flange 13 of the decorative body 12 enables the light sources 22 and 23 to be incorporated in the light guide 15 in a sideways state. That is, the configuration in which the light from the light sources 22 and 23 is circulated by the outer peripheral edge 154 of the light guide 15 and the flange 13 of the decorative body 12 is advantageous in reducing the thickness of the light emitting display device.

  (5) When the ratio of light leaking around the outer peripheral edge portion 154 of the decorative body 12 from the outer peripheral edge portion 123 of the decorative body 12 increases, the outer peripheral edge portion 154 of the light guide 15, the flange 13 of the decorative body 12 and the outer peripheral edge portion 123 increase. The amount of reflected light from the light reflecting layer 20 is reduced, and the visibility of the mark applied to the decorative body 12 at night is reduced.

  In the configuration in which the inner peripheral edge 111 of the frame 11 protrudes into the inner region of the reflective layer 25, the light that has come around the outer peripheral edge 154 of the light guide 15, the flange 13 of the decorative body 12, and the outer peripheral edge 123 is decorated. The ratio of leaking forward from the outer peripheral edge 123 of the body 12 is reduced. That is, the configuration in which the inner peripheral edge 111 of the frame 11 protrudes into the inner region of the reflective layer 25 contributes to an improvement in the visibility of the mark applied to the decorative body 12 at night.

Next, a second embodiment of FIG. 4 will be described. The same reference numerals are used for the same components as those in the first embodiment.
The outer periphery of the light guide 15 is formed with a taper 28 inclined at about 45 °, and the outer periphery of the decorative body 12 is formed with a taper 29 inclined at about 45 °. The inclined surface of the taper 28 and the inclined surface of the taper 29 form an angle of about 90 °, and the tapers 28 and 29 are covered with reflection layers 30 and 31 that reflect light. The reflective layers 30 and 31 are formed by vapor-depositing aluminum or silver. The light projected from the light source 22 is reflected by the reflection layers 30 and 31 and goes around the outer peripheral edge 154 of the light guide 15 and the outer peripheral edge 123 of the decorative body 12.

  In the second embodiment, the same effect as in the first embodiment can be obtained. In addition, since the reflective layers 30 and 31 are provided on the outer periphery of the light guide 15 and the decorative body 12, the ratio of the light projected from the light source 22 to the light reflective layer 20 is higher than in the first embodiment. Become.

Next, a third embodiment of FIG. 5 will be described. The same reference numerals are used for the same components as those in the first embodiment.
In the third embodiment, a flat light guide 15A is used, and no reflective layer is provided on the front surface 152 of the light guide 15A. In the configuration without the reflective layer on the front surface 152 of the light guide 15A, the amount of light reaching the outer peripheral edge 154 of the light guide 15A is somewhat larger than in the configuration with the reflective layer on the front surface 152 of the light guide 15A. Although the number is reduced, the same effect as that of the first embodiment can be obtained in the third embodiment.

In the present invention, the following embodiments are also possible.
In the first embodiment, the inner peripheral surface of the frame 11 may be covered with a light reflecting layer .

In the first embodiment, the side wall surfaces 191 and 192 of the groove 19 may be covered with a reflective layer that reflects light, and the bottom wall surface 193 of the groove 19 may be covered with a colored light-impermeable layer.
In the first to third embodiments, the light sources 22 and 23 may be disposed near the outer peripheral edge 154 of the light guide 15.

In the first to third embodiments, a pair of light sources different from the light sources 22 and 23 may be arranged in series so as to be back to back on the minor axis of the elliptical light guide.

The technical idea that can be grasped from the embodiment described above will be described below.
[1] The light-emitting display device according to claim 4, wherein the light source is built in the lateral direction in the light guide.

  This is advantageous for reducing the thickness of the light emitting display device.

1st Embodiment is shown and (a) is a front view. (B) is the sectional view on the AA line of Fig.1 (a). (A), (b) is a partial expanded sectional view. FIG. The partial expanded sectional view which shows 2nd Embodiment. The partial expanded sectional view which shows 3rd Embodiment.

Explanation of symbols

  12 ... Decorative body. 121 ... The back of the decorative body. 123 ... The outer peripheral edge of the decorative body. 13: A flange constituting the light guiding means. 15, 15A: Light guides constituting light guide means. 154: The outer peripheral edge of the light guide. 19: A groove as a recess constituting the reflecting portion. 191, 192... Side wall surface as a forming wall surface. 20: a light reflecting layer constituting the reflecting portion. 21: Light opaque layer. 22, 23 ... Light source. 27: Reflecting portion.

Claims (1)

In a light emitting display device provided in a vehicle and illuminated with a decorative body by light from a light source,
In the light emitting display device, the light from the light source enters the inside of the outer peripheral edge of the decorative body, and the light that enters the outer peripheral edge of the decorative body from the outer peripheral edge side of the decorative body. There is a light guide means to go to the center side,
The light guide means includes a plate-shaped light guide disposed on the back side of the decorative body, and an outer peripheral edge portion of the light guide body and an outer peripheral edge portion of the decorative body are joined to transmit light. And
The light source is provided on the back side of the decorative body so that light can be projected into the light guide body,
The light projected from the light source into the light guide is guided in a direction intersecting the thickness direction of the light guide and in a direction from the center side of the light guide toward the outer peripheral edge side,
The decorative body, together are formed by the material of the light transmissive, the light-transmitting decorative member is provided with a reflecting portion,
Before Symbol reflecting portion, wherein a recess formed recess on the back side of the decorative body, with is constituted of a light reflecting layer which covers the formation wall of the recess, the outer peripheral edge portion of the decorative member by the light guiding means Illuminated by light from the light source that has entered the interior of
The light from the light source that illuminates the reflective portion is reflected forward of the decorative body by the reflective portion ,
The back surface of the decorative body is a light emitting display device in which a portion other than the light reflection layer is covered with a light non-transmissive layer that is not capable of transmitting light .

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