JP2005309157A - Display device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a display device capable of obtaining good perceptivity when lighting a light source and also obtaining a novel appearance by devising the configuration of a display panel. <P>SOLUTION: A dial face 2 is constituted by a scale 21, digits 22 and characters 23 that are formed of high reflectance and opaque layer on a surface 20a of watcher's visual side of a transparent display board 20, and a background B formed of high reflectance and opaque layer on the backside 20b opposite to the surface 20a. In the background B, an opening C is arranged inside of each scale 21, digit 22 and character 23 in the watcher's visual direction. Consequently, the contours of the scale 21, digits 22 and characters 23 are indirectly illuminated, thereby providing a combination meter 1 that is superior in the perceptivity and novel in appearance of the dial face 2 which is enhanced in three-dimensional effect without making the visual recognizer feel dazzling the light emission from the contours of the scale 21, digits 22 and characters 23. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a display device, and is suitable for application to a vehicle display device mounted on, for example, an automobile.

  2. Description of the Related Art Conventionally, for example, in a vehicle display device mounted on a vehicle or the like, a transparent color layer made of, for example, white is formed on one surface side of a translucent substrate constituting a display plate, and a predetermined color is formed on the transparent color layer. By providing a black non-transparent layer while leaving the display of characters, scales, symbols, etc., only the display is provided so that light can be transmitted, a light source is provided behind the translucent substrate, and the light source is turned on to display There is one that transmits light through the plate.

  According to this display device, when the light source is in a non-lighting state, the display panel has a white transmissive color layer visually recognized at a display portion having no opacity layer, and is white against a black background made of the opacity layer. Will be visually recognized.

  In addition, when the light source is in a lit state, the portion corresponding to the opaque layer is visually recognized as a black background, and only the display portion without the opaque layer is a white transparent color layer by the light from the light source provided on the back surface. Is transmitted and transmitted through.

  However, in such a display device, the appearance of the display board is not changed in the relationship that a white display is visually recognized against a black background when the light source is turned on and when the light source is not turned on, and the display form is large. Since there is no difference, there is a problem that the merchandise and design as a display device are lacking.

  In order to solve this problem, conventionally, for example, a display layer for forming a display design such as graduations and numbers on the surface of the light-transmitting substrate (side surface of the viewer) is formed in a light-impermeable color. A translucent bright color layer, for example, a translucent white layer serving as a background area of the display design is provided on the back surface (the side opposite to the viewer side), and a light non-transparent layer is formed on the translucent white layer. A display panel has been proposed in which an opening having an area larger than that of the display layer is formed in the light-impermeable layer corresponding to the position of the display layer on the surface of the light-transmitting substrate (see Patent Document 1).

  In such a display board, in the light source non-lighting state, a display layer made of, for example, a dark color forming a display design is clearly visually recognized with a light color, for example, a translucent white layer as a background.

  In addition, when the light source is turned on, such as at night, light from the light source passes through the light-transmitting light-colored layer from the gap between the display layer and the light-impermeable layer and exits from the display panel to the viewer side. To do. Thereby, the outline of the display layer is illuminated brightly. On the other hand, the background area of the display design is visually recognized as black because light from the light source is blocked by the light-impermeable layer and there is no extraneous light. That is, the display layer is visually recognized with its outline brightly illuminated in a black background.

Therefore, the above-mentioned display board can change a display form largely by the time of lighting of a light source, and the time of non-lighting.
JP 2002-104012 A

  In the display device including the display plate described in Patent Document 1 described above, an opening having a larger area than the display layer is formed in the light-impermeable layer on the back side of the translucent substrate corresponding to the display layer position. ing. In other words, the display layer is surrounded by a translucent bright color layer having a predetermined width. For this reason, in the light source lighting state, the light from the light source is directly incident on the eyes of the viewer when it passes through the translucent bright color layer.

  At this time, the light emission luminance of the light emitting portion around the display layer is substantially uniform as a whole. That is, the outline of the display layer is displayed in a band shape with uniform illuminance. For this reason, the appearance of the display device when the light source is turned on may not be interesting.

  On the other hand, the light source is turned on when the surroundings are dark, for example, at night, and the background portion of the display layer of the display panel is in a dark state because no external light is irradiated. Therefore, the contrast between the light emission luminance of the contour portion of the display layer and the surroundings becomes strong, and the viewer may feel dazzling light from the light source that passes through the translucent bright color layer.

  The present invention has been made in view of the above-described problems, and provides a display device capable of obtaining good visibility and a novel appearance when the light source is turned on by devising the configuration of the display panel. With the goal.

  In order to achieve the above object, the present invention employs the following technical means.

  The display device according to claim 1 of the present invention is a display device including a display plate made of a light-transmitting substrate and a light source that is disposed behind the display plate and transmits and illuminates the display plate. The display design includes a display design formed on a surface that is a viewer side surface of the light-transmitting substrate and a background portion formed on the back surface that is the surface opposite to the surface of the light-transmitting substrate. The background part is formed from a non-transparent layer, the background part is formed from a highly reflective and light-impermeable layer, and the background part is configured to have an opening part inside the display design in the viewing direction.

  In this case, the light emitted from the light source enters the light-transmitting substrate of the display plate through the opening formed in the light-impermeable layer, and has a high reflectance and light that is a display design on the surface of the light-transmitting substrate. It is incident on the opaque layer and reflected there. In addition, since the light incident on the translucent substrate is formed so that the opening portion is inside the display design in the viewing direction, it is blocked by the display design and is directly emitted from the display plate in the viewer direction. There is no. Part of the light reflected by the display design travels through the translucent substrate and is incident on the high reflectivity and light non-transparent layer, which is the background, and is reflected there to return to the surface of the translucent substrate again. Proceed toward. And when the advancing direction of the reflected light from a background part becomes an outer side rather than a display design, the reflected light from a background part radiate | emits to the viewer side from the translucent board | substrate surface.

  In the conventional display panel, an opening having a larger area than the display design is formed in the light-impermeable layer on the back side of the translucent substrate so as to correspond to the display design position. When passing through the light-transmitting bright color layer, it enters the viewer's eyes directly. Therefore, the viewer may feel dazzling light from the light source that transmits the contour light-emitting portion of the display design, that is, the translucent bright color layer, and the visibility of the display board may be reduced.

  On the other hand, in the display device according to claim 1 of the present invention, the band-like light emission from the contour portion of the display design is reflected light that is reflected at least twice (first the display design and then the background portion). . In other words, it becomes a soft appearance like indirect illumination light, and the viewer does not feel dazzling the contour emission of the display design.

  Furthermore, the brightness of the band-like light emitting portion is not uniform throughout, but is highest at the contour of the display design, that is, at the outer peripheral portion of the display design, and gradually changes as the distance from the display design increases. ing. For this reason, since the display design looks as if it is lifted from the surface of the translucent substrate, the appearance of the display board can be enhanced with a stereoscopic effect.

  As described above, in the display device according to the first aspect of the present invention, good visibility can be obtained and a novel appearance can be obtained when the light source is turned on.

  In the display device according to the first aspect of the present invention, the display form can be largely different between when the light source is turned on and when it is not turned on, as in the case of a conventional display panel. That is, when the light source is turned on, the background portion is not irradiated with extraneous light and is not illuminated by the light source and is darkened. Similarly, the black display design appears to emit light in a strip shape as described above. On the other hand, when the light source is not turned on, the background portion and the display design are irradiated with extraneous light and are visually recognized in the respective colors.

  The display device according to claim 2 of the present invention is configured such that the display design and the background portion are each formed as a two-layer structure in which a light-colored layer and a colored layer are laminated in this order from the translucent substrate side.

  In this case, when the light source is turned on, the light incident on the display plate is reflected by the bright color layer of the display design and the bright color layer of the background portion, that is, the high reflectivity layer, thereby increasing the light use efficiency from the light source. Can do. Further, in the background portion, by forming an opening in at least the colored layer of the bright color layer and the colored layer, it is possible to reliably prevent light from the light source from irradiating the background from other than the opening.

  Further, when the light source is not turned on, it is irradiated with extraneous light, the background portion is visually recognized by the color of the bright color layer, and the display design is visually recognized by the color of the colored layer. In other words, it is possible to arbitrarily set the visual color of the display design when the light source is not lit by adopting a two-layer structure in which the display design is laminated in the order of the light color layer and the colored layer from the translucent substrate side. As a result, the degree of freedom in design of the display board can be improved.

  The display device according to claim 3 of the present invention is configured such that at least one of the display design and the background portion is formed to have translucency.

  With such a configuration, when the light source is turned on, in addition to brightly emitting the outline of the display design in a strip shape, at least one of the display design and the background portion can be transmitted and illuminated with light from the light source. .

  Thereby, the appearance of the display board when the light source is turned on can be made novel.

  Hereinafter, a case where the display device according to the present invention is applied to a combination meter 1 mounted on an automobile will be described with reference to the drawings.

  FIG. 1 is a partial front view of a combination meter 1 according to an embodiment of the present invention, and shows a speedometer A that indicates the traveling speed of an automobile. In FIG. 1, the upper side is the upper side of the automobile, and the left-right direction is the width direction of the automobile.

  FIG. 2 is a cross-sectional view of the combination meter 1 according to an embodiment of the present invention, and is a cross-sectional view taken along the line II-II in FIG. In FIG. 2, the left side is a driver's seat, and the combination meter 1 is visually recognized from the left side in FIG.

  FIG. 3 is an enlarged view of a section taken along line III-III in FIG.

  FIG. 4 is an enlarged view of a portion IV in FIG.

  FIG. 5 is a schematic diagram for explaining an electric circuit configuration of the combination meter 1 according to the embodiment of the present invention.

  The combination meter 1 is provided so that the driver can visually recognize the front of the driver's seat in the passenger compartment of the automobile, and displays the operating state (traveling speed, engine speed, etc.) and various information of the automobile.

  As shown in FIG. 1, the combination meter 1 indicates a traveling speed of the automobile by a dial 2 and a pointer 3 that rotates along the surface of the dial 2.

  The dial 2 has a display design as shown in FIG. 1 on a surface 20a which is a viewer-side surface of a display substrate 20 made of, for example, a colorless transparent polycarbonate resin or acrylic resin, which is a translucent substrate. A certain scale 21, numbers 22, and characters 23 are provided. These scales 21, numerals 22 and characters 23 are for indicating the traveling speed of the automobile together with a pointer 3 which will be described later.

  The scale 21, the numbers 22, and the characters 23, which are display designs, are formed by providing a high reflectivity and opaque layer on the surface 20 a of the display substrate 20. In the combination meter 1 according to one embodiment of the present invention, the high reflectivity and opaque layer is formed as a two-layer structure. That is, as shown in FIG. 3, an opaque white layer Q that is a bright color layer is applied on the surface 20a, and an opaque blue layer P that is a colored layer is applied directly above the white layer Q. Yes.

  On the other hand, on the back surface 20b that is the surface opposite to the front surface 20a of the display substrate 20, a background portion B that is the background of the scale 21, the numbers 22, and the characters 23 is formed. The background portion B is formed by providing a high reflectivity and opaque layer on the back surface 20b. In the combination meter 1 according to one embodiment of the present invention, the high reflectivity and opaque layer is formed as a two-layer structure. That is, as shown in FIG. 3, an opaque white layer R that is a bright color layer is applied on the back surface 20b, and an opaque black layer S that is a colored layer is applied directly on the white layer R. Yes. The background B is provided with openings C corresponding to the scales 21, the numbers 22, and the characters 23. The opening C is formed by not providing the background B on the back surface 20b of the display substrate 20b. In other words, it is formed by not applying the white layer R and the black layer S on the back surface 20b. Therefore, in the opening C, the back surface 20a of the display substrate 20 is exposed. Moreover, each opening C is provided so that it may exist in the scale 21, the number 22, and the character 23 which are display designs. That is, the shape of each opening C is set so that the contour line X is inside the contour lines Y of the scale 21 and the numeral 22 in the viewing direction, as shown in FIG. Thereby, when the dial 2 is irradiated with light from a light emitting diode 4 that is a light source (described later) disposed behind the dial 2, the light from the light emitting diode 4 that has entered the display substrate 20 from the opening C is provided. Always enters the scale 21, the number 22, and the characters 23, which are display designs, in other words, enters the white layer Q and does not directly exit the display substrate 20 and go to the eyes of the viewer.

  Here, the blue layer P, the white layer Q, the white layer R, and the black layer S can be formed by printing or hot stamping, that is, by a colorant such as a paint. Further, at least one of the white layer Q and the white layer R is formed on the display substrate 20 by performing metal plating or metal vapor deposition, or by attaching a film subjected to metal plating or metal vapor deposition or the like. You may do it. In addition, at least one of the white layer Q and the white layer R may be formed from a thin metal plate and attached to the display substrate 20.

  As shown in FIG. 1, the scale 21 is disposed radially on a shaft 51 that is a rotation axis of a pointer 3 to be described later and on an arc concentric with the shaft 51. The numeral 22 is also arranged on an arc concentric with the shaft 51.

  Further, as shown in FIG. 2, the dial 2 includes a through hole 20c for allowing a boss portion 3b of a pointer 3 to be described later to be inserted into the back side (right side in FIG. 2) of the dial 2.

  The pointer 3 is made of a translucent material such as a colorless and transparent polycarbonate resin or acrylic resin. As shown in FIG. 2, the pointer 3 is fixed to a shaft 51 of a later-described movement 5 disposed on the back side (right side in FIG. 2) of the dial 2 via the boss portion 3b. Thereby, when the movement 5 is driven and the shaft 51 rotates, the pointer 3 also rotates integrally with the shaft 51. Further, the lower surface 3a of the pointer 3 is colored with a light-impermeable red color. Thereby, the pointer 3 is visually recognized in red when irradiated by external light from the outside of the combination meter 1, for example, sunlight. In addition, when the pointer 3 is illuminated with light from the light emitting diode 6 disposed on the back side of the dial 2 (right side in FIG. 2), the pointer 3 is displayed in red.

  Further, as shown in FIG. 2, the pointer 3 is provided with a light shielding cap 9 that covers the viewer side of the boss portion 3 b of the pointer 3. The light shielding cap 9 is formed in a substantially cylindrical shape from a light-impermeable material, such as a metal or a black resin material, and the diameter thereof is set to be larger than the diameter of the through hole 20 c of the dial 2. Therefore, the light from the light-emitting diode 6 is directly incident on the eyes of the viewer through the through-hole 20c or directly enters the eyes of the viewer without passing through the lower surface 3a of the pointer 3 by the light shielding cap 9. The viewer is surely prevented from being dazzled.

  For example, a cross coil actuator or a stepping motor is used as the movement 5 that is a power source for rotating the pointer 3. The movement 5 generates torque when a voltage is applied from the outside, and rotates the shaft 51. As a result, the pointer 3 fixed to the tip of the shaft rotates along the surface of the dial 2.

  The light emitting diode 6 and the movement 5 described above are mounted on a printed circuit board 7 disposed on the back side of the dial 2 (the right side in FIG. 2). The printed circuit board 7 is formed of, for example, a glass epoxy board or the like, and forms an electric circuit portion of the combination meter 1. Further, as shown in FIG. 2, a light emitting diode 4 as a light source is mounted on the printed circuit board 7. The light-emitting diode 4 is for transmitting and illuminating the scale 21, the number 22 and the character 23 of the dial 2. In addition, a reflector 12 a is disposed between the printed board 7 and the dial 2 so as to correspond to the light emitting diode 4. The reflector 12a guides the light emitted from the light emitting diode 4 toward the dial 2 so as to increase the use efficiency of the light emitted from the light emitting diode 4 to the dial 2 illumination. The reflector 12a is made integrally with a casing 11 described later. The printed circuit board 7 is mounted with a controller 8 which is a control device for controlling the light emitting diode 4 and the light emitting diode 6 to be turned on / off.

  The controller 8 is composed of, for example, a microcomputer, and controls the lighting and extinguishing of the light emitting diode 4 and the light emitting diode 6 and the driving of the movement 5 for rotating the pointer 3.

  On the viewer side of the dial 2 (left side in FIG. 2), a translucent cover 11 is installed via a facing plate 10. The translucent cover 11 keeps the interior of the combination meter 1 clean by preventing foreign matters such as dust and moisture from entering the interior of the combination meter 1.

  The dial 2, the pointer 3, the movement 5, the printed circuit board 7 and the like described above are accommodated and fixed in the casing 12. The casing 12 is made of, for example, a resin material. In addition, the casing 12 includes a reflector 12 a for reflecting the light emitted from the light emitting diode 4 at a position corresponding to the light emitting diode 4 to efficiently irradiate the dial 2.

  Next, an electric circuit configuration of the combination meter 1 according to one embodiment of the present invention will be described with reference to FIG.

  As shown in FIG. 5, power is constantly supplied from the battery 14 to the controller 8.

  In addition, an ignition switch 13 is connected to the controller 8 so that the operation position (ON or OFF) can be detected.

  In addition, a light control switch 16 is connected to the controller 8 so as to be able to detect the operation position (OFF, vehicle width lamp ON, headlamp ON).

  Further, as shown in FIG. 5, a speed sensor 15 for detecting the traveling speed of the automobile is connected to the controller 8 so that a detection signal can be input. The speed sensor 15 detects, for example, the rotational speed of the transmission output shaft of the automobile.

  Further, as shown in FIG. 5, the light emitting diode 4, the light emitting diode 6, and the movement 5 are connected to the controller 8.

  The controller 8 detects the operating state of the light control switch 16 to control turning on / off of each of the light emitting diodes 4, 6, calculates the speed of the vehicle based on the detection signal from the speed sensor 15, and calculates the calculated speed The movement 5 is driven so as to indicate on the speedometer A.

  Next, the visual effects of the combination meter 1 according to one embodiment of the present invention will be described, particularly the effects of the configuration of the dial 2 that is a feature of the combination meter 1 according to one embodiment of the present invention.

  (1) When the light control switch 16 is in the OFF position (mainly daytime).

  In this case, the controller 8 turns off the light emitting diodes 4 and 6. Therefore, the dial 2 of the combination meter 1 is illuminated by extraneous light, for example sunlight. That is, the scale 21, the number 22, and the characters 23, which are display designs, are visually recognized in blue when the blue layer P is irradiated with external light. The background portion B of the dial 2 is visually recognized as white when the white layer R is irradiated with external light. In addition, the lower surface 3a of the pointer 3 is visually recognized in red when irradiated with external light.

  Therefore, when the light control switch 16 is in the OFF position, the combination meter 1 is visually recognized with the scale 21, the numbers 22, and the characters 23 in blue and the pointer 3 in red against a white background.

  (2) When the light control switch 16 is in the vehicle width lamp ON position or the headlamp ON position (mainly at night).

  In this case, the controller 8 lights up the light emitting diodes 4 and 6.

  In this case, there is no extraneous light that illuminates the dial 2. Since the light emitted from the light emitting diode 4 is blocked by the opaque blue layer P and the opaque black layer S, the dial 2 is not transmissively illuminated. The background B is visually recognized in a dark state, that is, black.

  On the other hand, the light emitted from the light emitting diode 4 travels as indicated by the arrow in FIG. 3 and enters the display substrate 20 through the opening C, and then enters the white layer Q of the scale 21, the numbers 22, and the characters 23. Then, the light is reflected and then enters the white layer R. The reflected light reflected by the white layer R is emitted from the surface 20a of the display substrate 20 and travels toward the viewer's eyes as shown in FIG. As a result, as shown in FIG. 6, the outlines of the black scale 21, the numbers 22, and the characters 23 are white and brightly displayed in a light band shape.

  The pointer 3 is illuminated with light from the light emitting diode 6 and is displayed in red.

  Therefore, when the light control switch 16 is in the vehicle width lamp ON position or the headlamp ON position, the combination meter 1 has a black background, the scale 21, the numbers 22 and the characters 23 are black, and its outline is a belt. The pointer 3 emits red light and is visually recognized. Thereby, the appearance of the dial 2 can be made different in lighting / non-lighting of the light emitting diodes 4 and 6 which are light sources.

  At this time, in the reflected light that is reflected by the white layer R and travels in the viewer direction, the light closest to the outline of the scale 21, the number 22, and the character 23 has the smallest angle with the viewing direction, in other words, the eyes of the viewer As the distance from the contour of the scale 21, number 22, and character 23 along the surface of the dial 2 increases, the angle formed with the visual recognition direction increases, in other words, from the viewer's eye direction. To go. That is, the luminance in the band-like light emission portion of the outline of the scale 21, the number 22 and the character 23 is not uniform throughout, but is highest in the outline portion of the scale 21, the number 22 and the character 23 as shown in FIG. As the distance from the outline of the scale 21, the number 22 and the character 23 increases, the distance gradually decreases.

  Thereby, the scale 21, the number 22, and the character 23 are visually recognized as if they are lifted from the dial 2, that is, as if they jump out to the viewer side. Therefore, the combination meter 1 having a novel appearance can be provided by assuming that the appearance of the dial 2 is enhanced in three-dimensionality.

  The band-like light emission from the outlines of the scale 21, the numbers 22, and the characters 23 is reflected light that is reflected at least twice (first the white layer Q and then the white layer R) in the dial 2. This reflected light has a soft appearance like an indirect illumination light compared to light that passes through the light-transmitting bright color layer of the light-transmitting substrate in the conventional display device and directly enters the eyes of the viewer. The person does not feel dazzling the contour light emission of the display design unlike the conventional display device.

  Therefore, it is possible to provide the combination meter 1 with excellent visibility, in which the viewer does not feel the contour light emission of the display design dazzlingly.

  The combination meter 1 according to the embodiment of the present invention described above includes a dial 2 and a light emitting diode 4 that is disposed behind the dial 2 and illuminates and transmits the dial 2, and the dial 2 is transparent. A scale 21 as a display design formed on the surface 20a that is the viewer's side surface of the display substrate 20, numerals 22 and characters 23, and a background portion B formed on the back surface 20b that is the surface opposite to the surface 20a, The scale 21, the number 22 and the letter 23 are formed of two layers which are a high reflectance and light non-transparent layer, that is, a white layer Q on the surface 20a and a blue layer P thereon, and the background B has a high reflectance and Two layers which are light-impermeable layers, that is, a white layer R on the back surface 20b and a black layer S thereon, the background portion B is an opening located inside each scale 21, numeral 22, and character 23 in the viewing direction. Equipped with C It has a configuration that.

  In this case, when the light emitting diode 4 as the light source is turned on and the dial 2 is transmitted and illuminated, the light from the light emitting diode 4 is reflected by the white layer Q and the white layer R and then the outlines of the scales 21, the numbers 22 and the characters 23. The light is emitted from the part as band-shaped indirect illumination light. Moreover, the brightness | luminance of strip | belt-shaped indirect illumination light is not uniform in the whole, but is the highest in the outline part of the scale 21, the number 22, and the character 23, and it leaves | separates from the outline of the scale 21, the number 22, and the character 23. It is changing to be gradually lower. For this reason, the scale 21, the numbers 22, and the characters 23 appear as if they are lifted to the near side when viewed from the viewer.

  This provides the combination meter 1 with excellent visibility that does not cause the viewer to feel dazzling the contour emission of the scale 21, the numbers 22, and the characters 23, and enhances the three-dimensional appearance of the dial 2. As a result, the combination meter 1 having a novel appearance can be provided.

  Further, the scale 21, the number 22 and the character 23 are formed as a two-layer structure, that is, the scale 21 is formed from the white layer Q on the surface 20a side and the blue layer P which is a colored layer superimposed thereon. 21, the number 22 and the character 23 are increased in reflectance to increase the utilization efficiency of light from the light-emitting diode 4, and the color of the colored layer is changed to change the scale 21, the number 22 and the character 23 in the light-emitting diode 4 off state. The visual color can be easily and freely set. Therefore, the design freedom of the dial 2 can be improved.

  In addition, in the combination meter 1 by one Embodiment of this invention demonstrated above, the scale 21, the number 22, and the colored layer of the character 23 are made into the blue layer P, ie, the scale 21, the number 22, and the light emitting diode 4 at the time of light extinction Although the visual color of the characters 23 is blue, other colors may be used. Moreover, you may comprise from the multiple types of visual color, without making the visual recognition color of the scale 21, the number 22, and the character 23 into the same color.

  Moreover, in the combination meter 1 by one Embodiment of this invention demonstrated above, the scale 21, the number 22, and the character 23 which are display designs, and the background part B are displayed on the light-colored layer and the colored layer from the display substrate 20 side. Although a two-layer structure is formed in order, at least one of the scale 21, the number 22, the character 23, and the background portion B may be formed from a single layer having a high reflectance and a light-impermeable layer. For example, in the above-described combination meter 1 according to the embodiment of the present invention, the background portion B is formed from a white layer having a high light shielding property, and the scale 21, the number 22 and the characters 23 are formed from a silver layer having a high light shielding property. May be. In this case, when the light emitting diode 4 is turned off, that is, in the daytime, the dial 2 is visually recognized with the scale 21, the number 22, and the character 23 in silver on a white background. Alternatively, the background portion B may be formed of an aluminum thin plate having a fine hairline finish, and the scale 21, the number 22 and the character 23 may be formed from a mirror-like aluminum thin plate. In this case, when the light-emitting diode 4 is turned off, that is, in the daytime, the dial 2 is visually recognized with the scale 21, the numbers 22 and the letters 23 shining in silver on a matte aluminum background.

  Moreover, in the combination meter 1 by one Embodiment of this invention demonstrated above, although the scale 21, the number 22, and the character 23 which are display designs, and the background part B are all light-impermeable, at least of both One of them may be formed so as to have a light transmission property, and may be transmitted and illuminated by the light from the light emitting diode 4. In this case, the combination meter 1 according to an embodiment of the present invention uses the luminous intensity of the scale 21, the numeral 22 and the character 23, and the emission luminance of the transmitted light of the background portion B, and the luminous intensity of the contour emission of the scale 21, the numeral 22 and the character 23. Needless to say, the level is set so as not to impair the effect obtained by the above, that is, the novel appearance of the scale 21, the numbers 22, and the outlines of the characters 23.

  Moreover, in the combination meter 1 by one Embodiment of this invention demonstrated above, although the lower surface 3b of the pointer | guide 3 is colored red, it is not necessary to limit to red and another color may be used. Moreover, you may form the pointer | guide 3 itself from the resin colored translucently, without coloring the lower surface 3b.

  In the combination meter 1 according to the embodiment of the present invention described above, the light-emitting diode 4 and the light-emitting diode 6 are used as the light source. It may be replaced with a light source of a kind, for example, a light bulb, a discharge lamp, an EL panel or the like.

  Further, in the combination meter 1 according to the embodiment of the present invention described above, the controller 8 turns on and off the light emitting diodes 4 and 6 regardless of whether the ignition switch 13 is turned on or off, as shown in FIG. However, the present invention is not limited to this configuration. For example, the light emitting diodes 4 and 6 are controlled to be turned on / off based on the operation position of the light control switch 16 only when the ignition switch 13 is in the ON state. When the switch 13 is in the OFF state, the light emitting diodes 4 and 6 may be turned off regardless of the operation position of the light control switch 16.

  Moreover, although the combination meter 1 by one Embodiment of this invention demonstrated above demonstrated the speedometer A part as an example, it is not necessary to limit to the speedometer A, For example, another type of instrument, for example, the said motor vehicle The present invention may be applied to a tachometer for instructing the engine rotational speed, a fuel meter for instructing the amount of remaining fuel in the fuel tank, a water temperature meter for instructing the engine coolant temperature, and the like. Further, a plurality of instruments may be provided in one combination meter 1.

  Further, the display device according to one embodiment of the present invention described above may be applied to various devices for uses other than those for vehicles, such as consumer devices.

It is a partial front view of the combination meter 1 by one Embodiment of this invention. It is sectional drawing of the combination meter 1 by one Embodiment of this invention, and is the II-II sectional view taken on the line in FIG. It is an enlarged view of the III-III line cross section in FIG. It is the IV section enlarged view in FIG. It is a mimetic diagram explaining the electric circuit composition of combination meter 1 by one embodiment of the present invention. It is a schematic diagram explaining the appearance at the time of light emitting diode 4 lighting of the combination meter 1 by one Embodiment of this invention.

Explanation of symbols

1 Combination meter (display device)
2 Dial (Display board)
20 Display substrate (Translucent substrate)
20a front surface 20b back surface 21 scale (display design)
22 Numbers (display design)
23 characters (display design)
3 Pointer 3a Lower surface 3b Boss 4 Light-emitting diode 5 Movement 51 Shaft 6 Light-emitting diode (light source)
7 Printed Circuit Board 8 Controller 9 Shading Cap 10 Turnaround Plate 11 Transparent Cover 12 Casing 12a Reflector 13 Ignition Switch 14 Battery 15 Speed Sensor 16 Light Control Switch A Speedometer B Background C Opening P Blue Layer (High Reflectance and Light Impermeability) Layer, colored layer)
Q white layer (high reflectivity, light opaque layer, light color layer)
R white layer (high reflectivity, light opaque layer, light color layer)
S Black layer (high reflectivity, light opaque layer, colored layer)
X contour line Y contour line

Claims (3)

A display board made of a translucent substrate;
A display device comprising a light source disposed behind the display plate for illuminating the display plate,
The display plate includes a display design formed on a surface which is a viewer side surface of the translucent substrate and a background portion formed on a back surface which is a surface opposite to the front surface of the translucent substrate,
The display design is formed from a highly reflective and light-impermeable layer,
The background is formed from a highly reflective and light opaque layer,
The display device according to claim 1, wherein the background portion includes an opening inside the display design in the viewing direction.   2. The display according to claim 1, wherein the high-reflectance and light-impermeable layer is formed as a two-layer structure in which a light-colored layer and a colored layer are laminated in this order from the light-transmitting substrate side. apparatus.   The display device according to claim 1, wherein at least one of the display design and the background portion is formed so as to have translucency.

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