JP4797503B2 - Display device - Google Patents

Description

  The present invention relates to a display device mounted on a vehicle or the like, and more particularly to a display device that produces a high-class feeling with a metallic appearance.

The display device disclosed in Patent Document 1 discloses a display device that changes its appearance between daytime and nighttime. In Patent Document 1, a white semi-transmissive ink layer that is visually recognized by external light reflection is provided on the viewer side of a light-transmitting substrate, and a chromatic color is provided on the counter-viewer side so as to face the semi-transmissive ink layer. The semi-transparent ink layer is provided to form a design. The display device as described above is designed such that the design is visually recognized in white by external light reflection during the daytime, illuminated by a light source provided on the back surface at night, and the design is visually recognized in a chromatic color. Productivity is improved through innovative productions that change the appearance.
Japanese Utility Model Publication No. 5-64727

  In recent years, a display device mounted on a vehicle or the like is required to produce a high-class feeling with a metallic appearance in addition to changing the appearance between daytime and nighttime.

  When a metallic design formed of a metallic material such as silver or gold is applied to a structure in which the design is visually recognized by transmitted illumination at night when the surroundings are dark, as in the display device disclosed in Patent Document 1, The design can be visually recognized in the daytime or the like by external light reflection, but has a problem that it cannot be visually recognized by the transmitted light at night or the like because of its low transmittance.

  The present invention has been made in view of this point, and by making it possible to display a design visually recognizable in a metallic manner by reflection of external light during a bright daytime or the like with a different appearance at a dark nighttime or the like. An object of the present invention is to provide a display device capable of improving the merchantability by a novel production and a high-quality appearance.

  In order to solve the above-described problems, the present invention provides a light source, a light shielding layer having a design-shaped transmission part, and a predetermined light provided on the counter-observer side of the light shielding layer to reflect light from the light source and guide the light to the transmission part. The translucent board | substrate which has a reflection part which consists of this uneven | corrugated shape in a counter-observer surface, and the metal tone layer provided in the area | region corresponding to the said transmission part at least on the counter-observer side of the said translucent board | substrate.

  According to a second aspect of the present invention, the transmissive portion is an opening facing the translucent substrate, and the translucent substrate includes a convex portion that fits into the transmissive portion.

  According to a third aspect of the present invention, the light source is provided to face an incident surface formed on an outer edge of the translucent substrate.

  Moreover, as for this invention, as for Claim 4, the said metal tone layer is provided in the base material separate from the said translucent board | substrate.

  Moreover, as for this invention, as for Claim 5, the said convex part is a scale shape.

  The present invention includes a light source, a light-shielding layer having a design-shaped transmission part, and a concave reflection part provided on the non-display side of the light-shielding layer and reflecting the light of the light source and leading to the transmission part on the non-display side. A translucent substrate, and a metal layer made of a metal material provided in at least a region facing the transmissive portion or a region facing the periphery of the transmissive portion on the non-display side of the translucent substrate, and daytime Productivity can be improved by a novel effect that changes the appearance at night and a high-quality metallic appearance.

  Hereinafter, embodiments of a display device to which the present invention is applied will be described with reference to the accompanying drawings.

  1 to 3 show a first embodiment of the present invention. 1 is a front view of the display device, FIG. 2 is a cross-sectional view taken along the line AA in FIG. 1, and FIG. 3 is a cross-sectional view taken along the line A-B in FIG.

  As shown in FIGS. 1 to 3, the display device according to the present embodiment includes light sources 1 and 2, a pointer 3, a dial 4, a translucent substrate (hereinafter referred to as a light guide) 5, a metal The gradation 6 is accommodated in the case 7, and the engine speed of the vehicle, for example, is indicated using an analog display based on the comparative interpretation of the pointer 3 and the dial 4.

  The light sources 1 and 2 include a pointer light source 1 that illuminates a pointer 3 that will be described in detail later, and a design light source 2 that illuminates a dial 4 and a light guide 5 that will be described in detail later. The pointer light source 1 and the design light source 2 are top view type light emitting diodes mounted on circuit boards 8 and 9, which will be described in detail later, and emit white light. The pointer light source 1 is a backlight that is provided on the counter-observer side of the pointer 3 and illuminates the pointer 3 from the back side. The design light source 2 is incident on the viewer side with light incident from the side of the light guide 5. It is an edge light that illuminates the transmissive part 10 forming the design to be provided.

  The pointer 3 is made of a light-transmitting material such as acrylic or polycarbonate (PC), and is provided on a drive shaft 12 extending from the center of a drive source 11 provided on the back surface of the circuit board 8 described in detail later. It rotates with the rotation. The pointer 3 includes a rotation center portion 13 into which the drive shaft 12 is inserted and receives light from the light source 1, and a pointer portion 14 that extends from the rotation center portion 13 in the thrust direction and exposes the translucent material. The rotation center portion 13 is covered with a light-shielding pointer cap 15.

  When the pointer portion 14 is provided with a transparent white print layer provided by a hot stamp or the like on the side of the observer and is displayed by external light reflection without using the pointer light source 1 in the daytime when the surroundings are bright, etc. At night when the surroundings are dark and the surroundings are dark, the light emitted from the pointer light source 1 passes through the white printing layer and becomes white transmitted light and is viewed in white.

  The drive source 11 includes a stepping motor, a cross coil, and the like, and is provided on the back surface of the circuit board 8 described in detail later. The drive source 11 has a drive shaft 12 that extends from the drive source 11 through the circuit board 8 and extends in the direction of the dial 4, and a rotation center portion 13 of the pointer 3 is fixed to the tip of the drive shaft 12.

  The dial plate 4 includes a light-shielding layer (hereinafter referred to as a background portion) 16 formed by applying a black light-shielding ink to a light-transmitting member made of synthetic resin or the like, and a transmission portion 10. The pointer 3 rotates on the viewer side.

  The transmission unit 10 is formed of white-colored transparent chromatic ink and serves as an index 17 indicating the engine speed of the vehicle. The scale 17 is a scale-shaped opening provided in correspondence with the number 17. The design is constituted by the portion 18 and is added in an arc shape in 0.5 increments, and a pointer is designated. The numeral 17 is visually recognized in the chromatic color by ambient light reflection during bright daytime and the like, and the numeral 17 formed of transmissive ink is visually recognized by the transmitted light having the chromatic color in dark surroundings. The light shielding layer forming the background portion 16 may be formed directly on the light guide 5 by printing or the like, or a light shielding plate or the like may be used.

  The light guide 5 is a transparent member made of acrylic, polycarbonate (PC), cycloolefin polymer (COP), or the like, and is provided along the counter-observer side of the dial 4. The light guide 5 includes an incident surface 19 at the outer edge thereof, receives light from the design light source 2 provided to face the incident surface 19, and diffuses the light throughout the light guide 5. The light guide 5 includes a convex portion 20 on the observer side surface and a reflecting portion 21 on the counter-observer side surface.

  The convex portion 20 protrudes in a scale shape, is inserted into the scale portion 18 provided to be opened in the dial plate 4, and is exposed on the dial plate 4. By configuring the convex portion 20 as described above, it is possible to provide a three-dimensional appearance.

  The reflecting part 21 is a predetermined series of a plurality of minute grooves recessed in a V shape provided in the design region S facing the transmitting part 10 provided on the dial 4 on the side opposite to the observer of the light guide 5. It has an uneven pattern shape. The reflection part 21 reflects light toward the transmission part 10 (the numeral 17 and the scale part 18) by a reflection surface forming a minute groove recessed in the V shape by roughening. The reflection part 21 provided by the above structure reflects the transmitted light L1 emitted from the design light source 2 and incident from the incident surface 19 toward the transmission part 10 at night when the surroundings are dark. An observer visually recognizes a scale that emits light with high luminance in the emission color of the design light source 2 by the transmitted light L1. In addition, the reflection part 21 may use not only a groove | channel but uneven | corrugated pattern shapes, such as a dot and a grain | texture, and if the formation location reflects light in the transmission part 10, FIG. 4 shows 2nd Embodiment. As shown, it may be formed in the outer edge region E corresponding to the outer edge of the transmission part 10.

  The metal tone layer 6 has a gold or silver tone surface by printing, vapor deposition or the like on the viewer side surface of the base material 22 made of a synthetic resin provided on the anti-observer side of the light guide 5 via an air layer. And is formed substantially congruently with the scale part 18 so as to face the scale part 18. The metallic tone layer 6 provided by the above configuration reflects the external light L2 that enters from the transmission part 10 (scale part 18), such as in the daytime when the surroundings are bright, and the observer visually recognizes the reflected external light L2. In this way, a metallic (metallic) appearance is produced.

  In the present embodiment, when the metal tone layer 6 is directly provided on the light guide 5, there is a possibility that the groove of the reflecting portion 21 formed by the fine roughening process is filled with the metal tone layer 6. In order to prevent the control of the reflected light from becoming complicated, an air layer is set between the light guide 5 and provided on a base material 22 that is separate from the light guide 5. Thereby, the surface area of the metal tone layer 6 can be ensured and it can be set as a high reflectance. However, if the desired reflectivity can be ensured without filling the groove of the reflective portion 21 with the metallic tone layer 6, avoid the reflective portion 21 as shown in FIG. 4 as the second embodiment. The metallic tone layer 6 may be directly formed on the light guide 5.

  Further, as shown in the third embodiment in FIG. 5, when the reflective portion 21 is formed only in the outer edge region E around the transmissive portion 10 (scale portion 18) excluding the transmissive portion 10, Correspondingly, the metallic tone layer 6 congruent with the scale part 18 can also be provided directly on the non-observer side of the light guide 5.

  Moreover, the metal tone layer 6 should just provide at least the scale part 18, and as shown in FIG. 6 as 4th Embodiment, the metal tone layer 6 is comprised with a metal flat plate member, The entire region of the light guide 5 opposite to the viewer side may be opposed.

  The facing member 23 is made of black synthetic resin or the like, and is provided with a window portion 24 that faces the dial 4 and defines a display area of the dial 4 in the center. The facing member 23 is provided on the observer side of the dial plate 4 with a predetermined interval, and the window portion 24 hangs down on the dial plate 4 and is inclined so that the cross section has a substantially mortar shape.

  The circuit board 8 is a hard board made of glass epoxy resin or the like, and a driving source 11 is mounted on the back surface, and a plurality of pointer light sources 2 made of LEDs are mounted on the front surface. The circuit board 9 is provided perpendicular to the light guide 5 so that the design light source 2 to be mounted faces the light guide 5 incident surface 19.

  The case 6 is made of synthetic resin and is made of a white material that covers the back side of the circuit board 7 and a transparent material that covers the front side of the display side, and includes the pointer 3, the dial 4, the drive source 11, and the circuit boards 8 and 9. The main components of the display device are accommodated.

  The display device of the present embodiment having the above-described configuration is a novel that changes the appearance between daytime and nighttime by making the scale unit 18 visually visible with a metallic appearance during the daytime and with a light-emitting color appearance at nighttime. It is possible to provide a display device capable of improving the merchantability with a simple effect and a metallic appearance.

  In the present embodiment, the design illumination structure is an edge light system, but a backlight system may be used. In the case of adopting the backlight design illumination structure, a member for reflecting the light incident from the anti-observer side toward the reflecting portion is separately provided between the dial 4 and the light guide 5. Can be considered.

  As described above, the present invention can improve the merchantability through a novel effect that changes the appearance between daytime and nighttime and a metallic-like high-quality appearance.

  Moreover, this invention can provide the appearance with a three-dimensional effect by forming a design by the convex part which consists of a translucent board | substrate.

  Moreover, this invention can produce the external appearance change of a metal design with a simple structure by using the edge light provided facing the entrance plane formed in the outer edge part of a translucent board | substrate.

  Further, in the present invention, by providing the metal tone layer on a base material separate from the translucent substrate, the metal tone layer can be easily formed and can emit light with high luminance.

  Moreover, this invention can be set as a simple structure compared with the case where it uses for a number by using the permeation | transmission part which consists of a convex part for a scale.

  In the present embodiment, white light emitting LEDs are used as the light sources 2 and 3, but the light source and its emission color are arbitrary.

  In the present embodiment, the metal design is applied to the scale part, but in the present invention, the metal design is arbitrarily applied to other designs such as numbers and warning display symbols such as warnings. Can do.

The front view of the display device by a 1st embodiment. AA sectional drawing of FIG. FIG. 2 is a cross-sectional view of an essential part of A-B in FIG. 1. Sectional drawing of the principal part of the display apparatus by 2nd Embodiment. Sectional drawing of the principal part of the display apparatus by 3rd Embodiment. Sectional drawing of the principal part of the display apparatus by 4th Embodiment.

Explanation of symbols

1 pointer light source 2 design light source 3 pointer 4 dial 5 light guide (translucent substrate)
6 Metal tone layer 10 Transmission part 16 Background part (light shielding layer)
18 Scale part 19 Incident surface 20 Convex part 21 Reflection part
L1 Transmitted light
L2 outside light

Claims (5)

A light source;
A light shielding layer having a design-shaped transmission part;
A translucent substrate provided on the counter-observer side of the light-shielding layer and having a reflection portion on the counter-observer surface that has a predetermined concavo-convex shape that reflects light from the light source and guides it to the transmission portion;
A metal tone layer provided at least in a region corresponding to the transmission part on the counter-observer side of the translucent substrate;
A display device comprising: The transmissive part is an opening facing the translucent substrate,
The display device according to claim 1, wherein the translucent substrate includes a convex portion that fits into the transmissive portion. The display device according to claim 1, wherein the light source is provided to face an incident surface formed on an outer edge of the translucent substrate. The display device according to claim 1, wherein the metal tone layer is provided on a base material separate from the translucent substrate. The display device according to claim 2, wherein the convex portion has a scale shape.

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