JP2007327794A - Display - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a display provided with a display plate capable of changing a visual observation condition of a decorative pattern formed with irregular parts. <P>SOLUTION: This display 1 is provided with the display plate 2 having a substrate 20, and the irregular parts 23 formed as the decorative pattern on a visual observation side front face of the substrate 20, a light source 54 for illuminating the irregular parts 23 from a visual observation side orthogonal direction, and a control means 8 for controlling lighting-on/-off of the light source 54, the irregular parts 23 are provided alternately with the first reflecting face 24 formed substantially parallel to the substrate 20 and the second reflecting face 25 formed inclinedly with respect to the first reflecting face 24, and an illumination angle B of the light source 54 with respect to the first reflecting face 24 and an inclination angle A of the second reflecting face 25 with respect to the first reflecting face 24 are set to make a reflection intensity of reflecting light emitted from the light source 54 to the visual observation side by the second reflecting face 25 get higher than a reflection intensity of reflecting light emitted from the light source 54 to the visual observation side by the first reflecting face 24. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a display device provided with a display panel in which uneven portions are formed as a decorative pattern.

  2. Description of the Related Art Conventionally, there is a display device provided with a display board in which uneven portions are formed as a decorative pattern. For example, the concavo-convex portion is formed by printing or the like as a plurality of fine concavo-convex lines on the front side of the viewing side of a display board (clockface) made of resin.

  Specifically, the concavo-convex portion is formed as a concentric circular pattern formed concentrically with the through hole for inserting the display plate in the pointer instrument provided with the display plate, or radially from the through hole. It may be formed as an Asahi light pattern.

  The uneven part is intended to emphasize the metallic feeling of the display board as a fine metallic decoration pattern, and to display the display board in a metallic style and to give the display board a sense of luxury and sportiness. It is what.

  However, since the above-mentioned display board does not change the viewing state of the decorative pattern by the concavo-convex portion, it cannot sufficiently give the viewer a fun.

  This invention is made | formed in view of the said problem, The objective of this invention is providing the display apparatus provided with the display board which can change the visual observation state of the decoration pattern by an uneven | corrugated | grooved part. .

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

  The display device according to claim 1 includes a display plate having a substrate and a concavo-convex portion formed as a decorative pattern on a front side of the substrate on the viewing side, a light source that illuminates the concavo-convex portion from an oblique direction on the viewing side, and a point of the light source Control means for controlling wrinkles / extinguishment, and a concavo-convex portion formed substantially parallel to the substrate, and a second reflective surface formed inclined with respect to the first reflective surface, Alternately, the irradiation angle of the light source with respect to the first reflection surface and the inclination angle of the second reflection surface with respect to the first reflection surface are such that the reflection intensity at which the second reflection surface reflects the light emitted from the light source to the viewing side is first. The reflection surface is set to be larger than the reflection intensity for reflecting the light emitted from the light source to the viewing side.

  In this configuration, when the light source that illuminates the uneven portion from the oblique direction on the viewing side is turned on, the second reflecting surface reflects the light emitted from the light source toward the viewing side, and the first reflecting surface reflects the light emitted from the light source. It is set to be larger than the reflection intensity reflected to the viewing side. Thereby, since the reflected light of the 2nd reflective surface is emphasized more visually, ie, the 2nd reflective surface is emphasized more, the unevenness | corrugation property of an uneven | corrugated | grooved part is emphasized. As a result, the decorative pattern by the concavo-convex portion is emphasized and visually observed.

  On the other hand, extraneous light enters from the viewing side when the light source is extinguished, but contrary to the light emitted from the light source, the second reflecting surface reflects the extraneous light to the viewing side, and the first reflecting surface is extraneous light. Is smaller than the reflection intensity at which the light is reflected to the viewing side. Thereby, since the 2nd reflective surface is hard to see and is hard to be emphasized, the unevenness of an uneven part is hard to be visually observed. That is, it becomes difficult to visually observe the decorative pattern due to the uneven portion.

  As a result, the visual state of the decorative pattern by the concavo-convex portion can be changed by controlling the turning on / off of the light source.

  The display device according to claim 2, wherein the irradiation angle of the light source with respect to the first reflection surface and the inclination angle of the second reflection surface with respect to the first reflection surface are such that the second reflection surface reflects light emitted from the light source toward the viewing side. The first reflecting surface is set so that the reflection intensity for reflecting the light emitted from the light source to the viewing side is made substantially zero without reducing the intensity.

  Thereby, when the light source is turned on, the reflected light of the second reflecting surface is more emphasized and visually observed, so that the unevenness of the uneven portion is emphasized. For this reason, the decorative pattern by the uneven part is more emphasized and visually observed.

  On the other hand, when the light source is extinguished, since the reflection intensity at which the first reflecting surface reflects the extraneous light to the viewing side becomes higher, the second reflecting surface is relatively less visible, that is, more difficult to be emphasized. . For this reason, the decorative pattern by the uneven part becomes more difficult to see.

  That is, it is possible to further change the visual state of the decorative pattern by the concavo-convex portion by controlling the turning on / off of the light source.

  The display device according to claim 3 is characterized in that the inclination angle is changed so as to correspond to the decorative pattern.

  In this configuration, the inclination angle is changed corresponding to the decorative pattern. Thereby, the reflection intensity of the 2nd reflective surface with respect to the light which a light source emits can be changed corresponding to a decoration pattern. For this reason, when the light source is turned on, the decorative pattern by the concavo-convex portion is more emphasized and visually observed. As a result, the visual state of the decorative pattern by the concavo-convex portion can be changed more by controlling the turning on / off of the light source.

  The display device according to claim 4 is characterized in that at least one of the uneven height of the uneven portion and the uneven pitch of the uneven portion is changed to correspond to the decorative pattern.

  In this configuration, at least one of the uneven height of the uneven portion and the uneven pitch of the uneven portion is changed corresponding to the decorative pattern. Thereby, when the light source is turned on, the decorative pattern by the uneven portion is more emphasized and visually observed. As a result, the visual state of the decorative pattern by the concavo-convex portion can be changed more by controlling the turning on / off of the light source.

  In the display device according to claim 5, the decorative pattern is any one of a concentric pattern in which lines are concentrically arranged with respect to a predetermined part of the display board and an Asahi light pattern in which lines are radially arranged from this part. It is characterized by that.

  Even in this configuration, the above-described effects can be obtained.

  According to a sixth aspect of the present invention, there is provided a display device including a pointer that rotates along the viewing-side front surface of the display plate, and the vicinity of the portion is the center of rotation of the pointer.

  Even in this configuration, the above-described effects can be obtained.

  In the display device according to claim 7, the inclination angle is gradually increased from the portion toward the outer peripheral side so that the reflection intensity of the second reflecting surface with respect to the light emitted from the light source gradually increases from the portion toward the outer peripheral side. It is characterized by being changed to.

  In this configuration, the reflection intensity of the second reflecting surface with respect to light emitted from the light source is formed so as to gradually increase from the portion toward the outer peripheral side. Thereby, when the light source is turned on, the decorative pattern formed by the concavo-convex portion is gradually brightened from the portion toward the outer peripheral side, that is, emphasized as a gradation and visually observed. As a result, the visual state of the decorative pattern by the concavo-convex portion can be changed more by controlling the turning on / off of the light source.

  The display device according to claim 8 is characterized in that the uneven height of the uneven portion is gradually increased from the portion toward the outer peripheral side.

  In this configuration, since the height of the unevenness is gradually increased from the portion toward the outer peripheral side, the second reflecting surface is gradually increased relative to the first reflecting surface. At the time of turning on, the decorative pattern by the concavo-convex portion is gradually brightened from the portion toward the outer peripheral side, that is, highlighted as a gradation and visually observed.

  As a result, the visual state of the decorative pattern by the concavo-convex portion can be changed more by controlling the turning on / off of the light source.

  The display device according to claim 9 is characterized in that the concavo-convex pitch of the concavo-convex portion is gradually decreased from the portion toward the outer peripheral side.

  In this configuration, the concave / convex pitch is gradually decreased from the portion toward the outer peripheral side, so that the second reflective surface is gradually increased relative to the first reflective surface. At the time of turning on, the decorative pattern by the concavo-convex portion is gradually brightened from the portion toward the outer peripheral side, that is, highlighted as a gradation and visually observed.

  As a result, the visual state of the decorative pattern by the concavo-convex portion can be changed more by controlling the turning on / off of the light source.

  In the display device according to claim 10, the display plate includes a display design portion formed between the uneven portion and the viewing side front surface of the substrate, and the uneven portion is formed on the upper surface of the display design portion formed on the substrate. A translucent resin material is formed by ink jet printing.

  In this configuration, the display design portion is visually observed through the concavo-convex portion having translucency. Thereby, the visual state of the display design part can be changed by controlling the turning on / off of the light source.

  The display device according to claim 11 includes a display design portion in which the uneven portion and the substrate are formed by integral molding from a translucent resin material, and the display plate is formed on the back surface of the substrate on which the uneven portion is formed. It is characterized by that.

  In this configuration, the display design portion is visually observed through the light-transmitting uneven portion and the substrate. Thereby, the visual state of the display design part can be changed by controlling the turning on / off of the light source.

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

(Constitution)
FIG. 1 is a front view of a combination meter 1 which is a display device according to an embodiment of the present invention.

  2 is a cross-sectional view taken along line II-II in FIG.

  FIG. 3 is an enlarged view of a portion III in FIG.

  FIG. 4 is an enlarged view for explaining the structure of the uneven portion 23 shown in FIG.

  FIG. 5 is a schematic diagram for explaining the relationship between the reflection intensity of the concavo-convex portion 23, the inclination angle A, and the irradiation angle B.

  FIG. 6 is a circuit configuration diagram illustrating an electric circuit of the combination meter 1 according to one embodiment of the present invention.

  The combination meter 1 that is a display device is arranged in front of the driver's seat of the automobile and displays various vehicle information related to the automobile. As shown in FIG. 1, the combination meter 1 according to the present embodiment constitutes a speedometer that indicates the traveling speed of an automobile.

  The combination meter 1 includes a dial 2 that is a display plate, a translucent ring 3, and a pointer 4 that rotates along the front side of the dial 2 on the viewing side (the upper surface in FIG. 2).

  The dial 2 includes a substrate 20 (FIG. 3) formed from a light-transmitting material, such as a transparent polycarbonate resin, and a display design formed on the front side of the substrate 20 on the viewing side (upper surface in FIG. 3). The character part 21 which is a part and the uneven | corrugated | grooved part 23 formed as a decoration pattern on the upper surface of the character part 21 are provided.

  The character portion 21 is formed, for example, as a white and translucent printing layer, and the background portion 22 constituting the background of the character portion 21 is, for example, a blue, opaque transmission layer (or low translucency) printing layer. Formed as. The character portion 21 and the background portion 22 are formed by screen printing or hot stamp printing.

  As shown in FIG. 1, the concavo-convex portion 23 is formed as a concentric pattern in which lines are arranged concentrically with respect to the center (rotation center) around which the pointer 4 rotates. The uneven portion 23 is formed by so-called ink jet printing (digital printing).

  For example, colorless and transparent acrylic resin-based ink is ejected from a small hole called a nozzle provided in a head (not shown) to the upper surface of the character portion 21 and the background portion 22 by a piezo jet method or a thermal jet method, thereby causing unevenness. Part 23 is formed. At this time, ink is ejected from the nozzles while moving the head in accordance with the concentric pattern of the uneven portion 23 to be formed. For this reason, the uneven | corrugated | grooved part 23 can be formed not only as a concentric pattern but as another complicated decoration pattern.

  The translucent ring 3 is formed in a ring shape from translucent acrylic resin or the like, and includes a scale portion 31 formed as a recess on the back side (lower side in FIG. 2) of the translucent ring 3. The light emitted from the light emitting diode 53 is guided into the translucent ring 3 according to the optical path P1 in FIG. 1, and the scale unit 31 uses the light emitted from the light emitting diode 53 guided into the translucent ring 3 to the viewing side. (Upper side in FIG. 2), and thereby, the scale portion 31 is made visible as reflected light.

  Behind the dial 2 (lower side in FIG. 2), a movement 41, light emitting diodes 51-53, a light emitting diode 54 as a light source, a case 6, and a printed board 7 are arranged. The printed circuit board 7 forms an electric circuit portion of the combination meter 1, and the movement 41 and the light emitting diodes 51-54 are mounted on the printed circuit board 7.

  The movement 5 is composed of, for example, a cross coil movement, a stepping motor, or the like, and rotates the shaft 42 by an angle corresponding to an external electric signal (a vehicle speed signal in the combination meter 1 according to the present embodiment). A through hole 26 is provided in a substantially central portion of the dial 2, and the shaft 51 extends to the viewing side (upper side in FIG. 2) of the dial 2 through the through hole 26 of the dial 2, and the pointer 4 is at the tip thereof. Fixed.

  On the printed circuit board 7 is mounted a control device 8 (FIG. 6) which is a control means for driving the movement 41 and controlling the turning on / off of the light emitting diodes 51-54. The control device 8 is composed of, for example, a microcomputer.

  In the case 6, the light from the light emitting diode 51 is guided to the pointer 4 to emit and display the pointer 4, for example, white light from the light emitting diode 52 is guided to the back of the dial 2 to illuminate the dial 2. Further, the case 6 reflects, for example, white light from the light emitting diode 54 by the reflection surface 61 and guides it to the front side of the dial 2 on the viewing side. The light from the light-emitting diode 54 guided to the front side of the dial 2 on the viewing side illuminates the concave-convex portion 23 from an oblique direction on the viewing side, that is, from the direction indicated by the optical path P2 in FIG.

  As shown in FIGS. 3 and 4, the concavo-convex portion 23 includes a first reflecting surface 24 formed substantially parallel to the substrate 20 and a second reflecting surface formed inclined with respect to the first reflecting surface 24. 25 and alternately. The light emitted from the light-emitting diode 54 illuminates the concavo-convex portion 23 according to the optical paths P2, P21, and P22 in FIGS. 2, 3, and 4, and according to the optical paths P21 and P22 in FIGS. And reflected upward (in FIG. 4).

  The irradiation angle B of the light-emitting diode 54 with respect to the first reflecting surface 24 and the inclination angle A of the second reflecting surface 25 with respect to the first reflecting surface 24 indicate the light emitted from the light-emitting diode 54 by the second reflecting surface 25 on the viewing side (in FIG. 4). The reflection intensity reflected toward the upper side is set to be higher than the reflection intensity at which the first reflecting surface 24 reflects the light emitted from the light emitting diode 54 toward the viewing side.

  In FIG. 5, when the reflection angle E of the reflected light of the second reflecting surface 25 is 90 degrees or less (E ≦ 90), the reflection intensity at which the second reflecting surface 25 reflects the light emitted from the light emitting diode 54 to the viewing side. Is proportional to sin (sign) E. When the reflection angle of the reflected light of the first reflecting surface 24 is C, the reflection intensity at which the first reflecting surface 24 reflects the light emitted from the light emitting diode 54 to the viewing side is proportional to sin (sign) C.

  Accordingly, in this case, the reflection intensity at which the second reflecting surface 25 reflects the light emitted from the light emitting diode 54 to the viewing side is made larger than the reflection intensity at which the first reflecting surface 24 reflects the light emitted from the light emitting diode 54 to the viewing side. This can be shown by the equation (1).

E> C (1)
On the other hand, when E> 90 (degrees), the reflection intensity at which the second reflecting surface 25 reflects the light emitted from the light emitting diode 54 to the viewing side is proportional to sin (180-E). Accordingly, in this case, the reflection intensity at which the second reflecting surface 25 reflects the light emitted from the light emitting diode 54 to the viewing side is made larger than the reflection intensity at which the first reflecting surface 24 reflects the light emitted from the light emitting diode 54 to the viewing side. This can be shown by the equation (2).

(180-E)> C (2)
The reflection angle E is a reflection angle with respect to the first reflection surface 24 of the reflected light that the second reflection surface 25 reflects the light emitted from the light emitting diode 54 to the viewing side, and the reflection angle C is the light reflection diode of the first reflection surface 24. It is a reflection angle with respect to the 1st reflective surface 24 of the reflected light which reflected the light which 54 emits to the visual side.

  Hereinafter, the relationship between the inclination angle A and the irradiation angle B for satisfying the expression (1) is obtained.

  As a premise, as shown by the optical path P21 in FIG. 5, since the reflected light of the second reflecting surface 25 needs to be reflected to the viewing side, the inclination angle A and the irradiation angle B have the relationship shown by the equation (3). I need.

(A + B) <90 ... (3)
In FIG. 5, the inclination angle A, the irradiation angle B, and the angle D have a relationship of A + B = D, and the inclination angle A, the angle D, and the angle E have a relationship of A + D + E = 180. For this reason, the reflection angle E can be expressed by Equation (4).

E = 180- (2A + B) (4)
Further, the irradiation angle B and the reflection angle C have the relationship of the formula (5).

C = B (5)
When E ≦ 90 (degrees), substituting equation (4) and equation (5) into equation (1) yields equation (6), and substituting equation (4) into E ≦ 90 yields equation (7) can get.

(A + B) <90 ... (6)
(2A + B) ≧ 90 (7)
Since the expressions (3) and (6) are the same, the requirement that the reflection intensity by the second reflection surface 25 is greater than the reflection intensity by the first reflection surface 24 with respect to the light emitted from the light emitting diode 54. Is to satisfy both equation (3) and equation (7).

  On the other hand, in the case of E> 90 (degrees), when Expression (4) and Expression (5) are substituted into Expression (2), Expression (8) is obtained, and when Expression (4) is substituted into E> 90, Expression (9) is obtained. ) Is obtained.

A> 0 (8)
(2A + B) <90 ... (9)
The expression (8) is naturally satisfied, and if the expression (9) is satisfied, the expression (3) can be satisfied. Therefore, the reflection intensity by the second reflecting surface 25 with respect to the light emitted from the light emitting diode 54 is The requirement to make the intensity greater than the reflection intensity by one reflecting surface 24 is to satisfy the equation (9).

  For example, when the inclination angle A is 40 degrees and the irradiation angle B is 10 degrees, both the expressions (3) and (7) are satisfied. In this case, the reflection angle E is obtained from the equation (4) and becomes 90 degrees, and the reflection angle C is obtained by the expression (5) and becomes 10 degrees. Thereby, the reflection intensity to the viewing side by the second reflection surface 25 becomes larger than the reflection intensity to the viewing side by the first reflection surface 24 with respect to the light emitted from the light emitting diode 54, and the second reflection surface 25 is more emphasized. Is done. For this reason, the unevenness | corrugation property of the uneven part 23 is emphasized, and the concentric pattern by the uneven part 23 is emphasized and visually observed.

  On the other hand, when the light emitting diode 54 is extinguished, extraneous light is incident on the projections and depressions 23 from the viewing side and is reflected by the first reflecting surface 24 and the second reflecting surface 25 according to the optical paths P31 and P32 in FIG. As apparent from the optical paths P31 and P32 in FIG. 3, in the external light, the reflection angle of the reflected light of the second reflective surface 25 with respect to the first reflective surface 24, as opposed to the case of the light from the light emitting diode 54. Is smaller than the reflection angle of the reflected light of the first reflecting surface 24.

  That is, the external light has a reflection intensity at which the second reflection surface 25 reflects the external light to the viewing side, and the first reflection surface 24 reflects the external light to the viewing side, contrary to the light from the light emitting diode 54. Less than strength. Thereby, since the 2nd reflective surface 25 is hard to see and is hard to be emphasized, the unevenness | corrugation of the uneven | corrugated | grooved part 23 is hard to be visually observed. That is, the concentric pattern by the uneven part 23 becomes difficult to see.

  As a result, the visual state of the concentric circle pattern by the concavo-convex portion 23 can be changed by controlling the turning on / off of the light emitting diode 54.

  When the light emitting diode 54 is turned on, in order to make the concentric circle pattern formed by the concavo-convex portion 23 more emphasized and visually observed, the inclination angle A and the irradiation angle B are set so that the reflection angle E is about 60 to 90 degrees. In addition, it is desirable to set the reflection angle C to be about 10 to 30 degrees.

  More preferably, the reflection angle E is set to about 90 degrees and the reflection angle C is set to 10 degrees or less. As a result, the second reflection surface 25 does not reduce the reflection intensity at which the light emitted from the light emitting diode 54 is reflected toward the viewing side, and the reflection intensity at which the first reflection surface 24 reflects the light emitted from the light emitting diode 54 toward the viewing side is substantially reduced. Can be zero.

  On the other hand, in this case, when the light emitting diode 54 is extinguished, the reflection intensity at which the first reflecting surface 24 reflects the extraneous light to the viewing side becomes larger, so that the second reflecting surface 25 is relatively less visible. It becomes harder to be emphasized. For this reason, the concentric pattern by the uneven | corrugated | grooved part 23 becomes more difficult to visually recognize.

  That is, by controlling the turning on / off of the light emitting diode 54, the visual state of the concentric pattern by the concavo-convex portion 23 can be further changed.

  Further, the inclination angle A is set so that, for example, the reflection angle E gradually increases from 30 degrees to 90 degrees so that the reflection angle E gradually increases from the center of rotation of the pointer 4 toward the outer peripheral side in FIG. To do. Thereby, when the light emitting diode 54 is turned on, the reflection intensity from the second reflecting surface 25 gradually increases from the rotation center of the pointer 4 toward the outer peripheral side, and the concentric pattern by the concave and convex portions 23 causes the rotation of the pointer 4. It is gradually brightened from the center toward the outer peripheral side, that is, it is visually emphasized as a gradation.

  Note that this gradation can also be formed by gradually increasing the uneven height H of the uneven portion 23 shown in FIG. 4 from the rotation center of the pointer 4 toward the outer peripheral side. By gradually increasing the unevenness height H, the second reflecting surface 25 is gradually increased relative to the first reflecting surface 24. For this reason, when the light emitting diode 54 is turned on, the concentric pattern formed by the concave and convex portions 23 is gradually brightened from the center of rotation of the pointer 4 toward the outer peripheral side, that is, emphasized as a gradation and visually observed.

  The gradation can also be formed by gradually decreasing the uneven pitch P shown in FIG. 4 from the center of rotation of the pointer 4 toward the outer peripheral side. By gradually decreasing the uneven pitch P, the second reflecting surface 25 is gradually increased relative to the first reflecting surface 24. For this reason, when the light emitting diode 54 is turned on, the concentric pattern formed by the concave and convex portions 23 is gradually brightened from the center of rotation of the pointer 4 toward the outer peripheral side, that is, emphasized as a gradation and visually observed.

  The gradation can also be formed by gradually changing at least one of the uneven height H of the uneven portion 23, the uneven pitch P of the uneven portion 23, and the inclination angle A. For example, the inclination angle A is changed to 60 degrees, the unevenness height H is changed to 0.1 millimeter (mm), and the unevenness pitch P is changed around 0.3 mm.

  The electric circuit configuration of the combination meter 1 according to the present embodiment described above will be described with reference to FIG.

  The control device 8 is always supplied with power from the battery 12. An ignition switch 11 is connected to the control device 8 so that its operating state (on or off) can be detected, and a speed sensor 9 for detecting the traveling speed of the vehicle and a small lamp (tail lamp) of the vehicle are turned on. A small lamp lighting switch 10 is connected to be able to input a detection signal. The control device 8 is also connected to the light emitting diodes 51 to 54 and the movement 41.

  Further, the control device 8 is configured to turn on the light emitting diode 54 when the small lamp lighting switch 10 is turned on.

(Operation)
The operation of this embodiment in the above configuration will be described.

  When the ignition switch 11 is turned on by the driver, the control device 8 detects that the ignition switch 11 is turned on, and the control device 8 turns on the light emitting diodes 51-53. Thereby, the pointer 4 emits light, the dial 2 is transmitted and illuminated, the character portion 21 emits light, and the scale portion 31 of the translucent ring emits light. In addition, the control device 8 drives the movement 41 based on the detection signal from the speed sensor 9 to rotate the shaft 42 to a predetermined angle, that is, an angle corresponding to the traveling speed of the automobile.

  Further, when the surroundings become dark (when the amount of incident external light incident on the combination meter 1 decreases), the driver turns on the small lamp lighting switch 10 to turn on the small lamp of the vehicle. The control device 8 detects it and turns on the light emitting diode. Hereinafter, the visual state of the dial 2 will be described separately when the light emitting diode 54 is turned on and off.

(1) When the light-emitting diode 54 is extinguished External light is incident on the uneven portion 23 from the viewing side, and is reflected by the first reflecting surface 24 and the second reflecting surface 25 according to the optical paths P31 and P32 in FIG. For external light, the reflection intensity on the viewing side by the second reflecting surface 25 is smaller than the reflection intensity on the viewing side by the first reflecting surface 24. Thereby, since the 2nd reflective surface 25 is hard to see and is hard to be emphasized, the unevenness | corrugation of the uneven | corrugated | grooved part 23 is hard to be visually observed. That is, the concentric pattern by the uneven part 23 becomes difficult to see.

  On the other hand, the white light emitted from the light-emitting diode 52 is transmitted through the white character portion 21 having translucency according to the optical path P4 in FIG. 3, and the character portion 22 is displayed in white with the blue background portion 22 as the background. Let The character part 22 is visually observed through the transparent uneven part 23 in which a concentric pattern is not conspicuous.

(2) When the light-emitting diode 54 is turned on The white light of the light-emitting diode 54 that has been turned on illuminates the concavo-convex portion 23 according to the optical paths P2, P21, and P22 in FIGS. Reflected to the viewing side according to the optical paths P21 and P22 in the middle. With respect to the light emitted from the light emitting diode 54, the reflection intensity on the viewing side by the second reflecting surface 25 is larger than the reflection intensity on the viewing side by the first reflecting surface 24, and the second reflecting surface 25 is more emphasized.

  Thereby, the unevenness | corrugation property of the uneven part 23 is emphasized, and the concentric pattern by the uneven part 23 is emphasized and visually observed. The character part 22 is visually observed through the transparent uneven part 23 in which the concentric pattern is emphasized.

  As a result, it is possible to change both the visual state of the concavo-convex part 23 and the visual state of the character part 22 through the concavo-convex part 23 by controlling the turning on and off of the light emitting diode 54.

  In addition, without forming the uneven part 23 as a concentric pattern, it is also possible to form the line as an Asahi pattern or other decorative pattern in which the lines are arranged radially from the center of rotation of the pointer 4.

(Modification)
FIG. 7 is an enlarged view showing a first modification of FIG.

  In the first modified example, as shown in FIG. 7, the concavo-convex portion 23 and the substrate 20 are formed by integral molding from a translucent resin material. In this case, the character portion 21 and the background portion 22 are formed on the back surface (lower surface in FIG. 7) of the substrate 20 on which the uneven portion 23 is formed. The effect mentioned above can be acquired also by this.

  FIG. 8 is an enlarged view showing a second modification of FIG.

  In the second modified example, in FIG. 8, the concavo-convex portion 23 is formed from a light-impermeable material.

  In FIG. 7, it is also possible to form a first reflecting surface 24 and a second reflecting surface 25 by vapor-depositing an opaque aluminum layer on the viewing-side front surface (upper surface in FIG. 7) of the uneven portion 23. It is.

  In these cases, the uneven portion 23 is formed at a position that does not overlap the character portion 21 of the dial in FIG. Thereby, the visual state of the concavo-convex portion 23 can be changed by controlling the turning on / off of the light emitting diode 54.

  As described above, the combination meter 1 that is a display device according to the present invention includes a dial 2 that is a display plate having a substrate 20 and a concavo-convex portion 23 formed as a decorative pattern on the front side of the substrate 20 on the viewing side, and a diagonal direction on the viewing side. Are provided with a light emitting diode 54 that is a light source for illuminating the concave and convex portion 23 and a control device 8 that is a control means for controlling turning on and off of the light emitting diode 54, and the concave and convex portion 23 is substantially parallel to the substrate 20. The first reflection surface 24 and the second reflection surface 25 formed to be inclined with respect to the first reflection surface 24 are alternately provided, and the irradiation angle B of the light emitting diode 54 with respect to the first reflection surface 24 and the first reflection surface 24 are provided. The inclination angle A of the second reflecting surface 25 with respect to the first reflecting surface 24 is the reflection intensity at which the second reflecting surface 24 reflects the light emitted from the light emitting diode 54 toward the viewing side, and the light emitted from the light emitting diode 54 at the first reflecting surface 24. The It characterized in that it is configured so as to be larger than the reflection intensity of reflected into photoreceptors side.

  Thereby, the display apparatus provided with the display board which can change the visual condition of the decoration pattern by an uneven | corrugated | grooved part can be provided.

  Note that the present invention is not limited to the above-described example, and combinations thereof and other various modifications are conceivable.

FIG. 1 is a front view of a combination meter 1 which is a display device according to an embodiment of the present invention. 2 is a cross-sectional view taken along line II-II in FIG. FIG. 3 is an enlarged view of a portion III in FIG. FIG. 4 is an enlarged view for explaining the structure of the uneven portion 23 shown in FIG. FIG. 5 is a schematic diagram for explaining the relationship between the reflection intensity of the concavo-convex portion 23, the inclination angle A, and the irradiation angle B. FIG. 6 is a circuit configuration diagram illustrating an electric circuit of the combination meter 1 according to one embodiment of the present invention. FIG. 7 is an enlarged view showing a first modification of FIG. FIG. 8 is an enlarged view showing a second modification of FIG.

Explanation of symbols

1 Combination meter (display device), 2 Dial (display board)
20 substrate, 21 character portion (display design portion), 22 background portion, 23 uneven portion, 24 first reflecting surface, 25 second reflecting surface, 26 through-hole, 3 translucent ring, 31 scale portion, 4 pointer, 41 movement, 42 Shaft 51-53 Light emitting diode, 54 Light emitting diode (light source)
6 Case, 61 Reflecting surface, 7 Printed circuit board, 8 Control device (control means)
9 Speed sensor, 10 Small lamp lighting switch 11 Ignition switch, 12 Battery A Inclination angle, H Unevenness height, P Unevenness pitch, B Irradiation angle B

Claims (11)

A display board having a substrate and a concavo-convex portion formed as a decorative pattern on the front side of the viewing side of the substrate;
A light source that illuminates the uneven portion from an oblique direction on the viewing side;
Control means for controlling turning on and off of the light source,
The concavo-convex portion alternately includes first reflective surfaces formed substantially parallel to the substrate and second reflective surfaces formed to be inclined with respect to the first reflective surface,
The irradiation angle of the light source with respect to the first reflecting surface and the inclination angle of the second reflecting surface with respect to the first reflecting surface are such that the second reflecting surface reflects the light emitted from the light source toward the viewing side. The display device, wherein the first reflecting surface is set to be larger than a reflection intensity for reflecting light emitted from the light source to the viewing side.   The irradiation angle of the light source with respect to the first reflecting surface and the inclination angle of the second reflecting surface with respect to the first reflecting surface reduce the reflection intensity at which the second reflecting surface reflects the light emitted from the light source toward the viewing side. 2. The display device according to claim 1, wherein the first reflection surface is set so that a reflection intensity at which the light emitted from the light source is reflected toward the viewing side is substantially zero.   The display device according to claim 1, wherein the inclination angle is changed so as to correspond to the decorative pattern.   The at least one of the uneven height of the uneven part and the uneven pitch of the uneven part is changed so as to correspond to the decorative pattern. Display device.   2. The decorative pattern is any one of a concentric pattern in which lines are concentrically arranged with respect to a predetermined part of the display board and an Asahi light pattern in which lines are radially arranged from the part. The display device according to any one of claims 4 to 4. A pointer that rotates along the front side of the viewing side of the display plate;
The display device according to claim 5, wherein the vicinity of the part is a center at which the pointer rotates.   The inclination angle is gradually changed from the part toward the outer peripheral side so that the reflection intensity of the second reflecting surface with respect to the light emitted from the light source gradually increases from the part toward the outer peripheral side. The display device according to claim 5, wherein:   The display device according to claim 5, wherein the uneven height of the uneven portion is gradually increased from the portion toward the outer peripheral side.   9. The display device according to claim 5, wherein the uneven pitch of the uneven portion is gradually decreased from the portion toward the outer peripheral side. The display plate includes a display design portion formed between the uneven portion and the front side of the substrate on the viewing side,
The said uneven | corrugated | grooved part is formed in the upper surface of the said display design part formed in the said board | substrate by inkjet-printing a translucent resin material, The any one of Claim 1 thru | or 9 characterized by the above-mentioned. The display device described in 1. The concavo-convex portion and the substrate are formed by integral molding from a translucent resin material,
11. The display device according to claim 1, wherein the display panel includes a display design portion formed on a back surface of the substrate on which the uneven portion is formed.

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