JP5408086B2 - Display device - Google Patents

Description

  The present invention relates to a display device including a display panel that displays a plurality of scales arranged in a ring shape.

  2. Description of the Related Art Conventionally, there has been known a display device in which a plurality of scales arranged in an annular shape are formed by a plurality of scale members arranged at intervals in the display direction of a display board. As a kind of such a display device, for example, a vehicular instrument disclosed in Patent Document 1 includes an incident portion for allowing light to enter and an emitting portion for emitting light incident from the incident portion toward an annular central portion. A light guide as a scale member and a light source that emits light toward an incident portion of the light guide.

  In the vehicle meter disclosed in Patent Document 1, light emitted from each light source enters the incident portion of each light guide, and then exits from the exit portion. A part of the light emitted from the emission part is reflected in the display direction on the display surface of the dial. Thereby, a plurality of light lines are projected on the surface of the dial in the display direction. A three-dimensional effect is imparted to the display of the display device by the spread of a plurality of light lines from the center of the scales arranged in a ring toward the emission part of each light guide.

JP 2006-84197 A

  Now, in the vehicular instrument described in Patent Document 1, when the number of light lines projected on the surface in the display direction of the dial is small, the light spreading from the annular central portion toward the exit portion of each light guide The line is less visible. Therefore, there is a possibility that the stereoscopic effect to be imparted to the display of the display device due to the spread of the light line becomes insufficient.

  Therefore, it is conceivable to increase the number of light guides in order to further ensure the stereoscopic effect imparted to the display of the display device by the spread of the light lines. However, in the vehicle meter described in Patent Document 1, one light source for supplying light to the light guide is provided for one light guide. Therefore, unless the number of light sources is increased, the number of light guides that can be provided in the display device cannot be increased.

  The present invention has been made in view of the above problems, and an object of the present invention is to provide a display device capable of forming a stereoscopic display with a small number of light sources.

To achieve the above object, the inventions of claim 1, a display panel having a display surface for displaying a plurality of graduations arranged annularly, are more disposed to the display direction of the display panel at a distance from each other Forming a plurality of scales, an incident part for making light incident, and an emitting part for projecting light incident on the display surface by emitting light incident from the incident part toward the annular central part, A scale member having a light source that emits light supplied to the scale member, and a light guide that guides light emitted from the light source to each incident portion of the plurality of scale members , characterized in that you tilt to the inside of the annular extent toward the display direction.

  According to this invention, a light guide guides the light radiated | emitted from a light source to each incident part of a some scale member. Therefore, even if the number of light sources is smaller than the number of scale members, the light emitted by the light sources is supplied to each scale member. As described above, it is possible to increase the number of scale members that can be provided in the display device while suppressing an increase in the number of light sources.

  In addition, by increasing the number of scale members, the number of light lines projected on the display surface of the display board also increases. Therefore, the line of light spreading from the annular central part toward each emitting part of each scale member can be visually recognized more clearly. As described above, the stereoscopic effect imparted to the display of the display device due to the spread of the light line is further ensured.

  Therefore, the display device can form a stereoscopic display with a small number of light sources.

In addition , according to the first aspect of the present invention, the light line projected on the display plate by the light emitted from the emitting portion is a reflection image of the emitting portion reflected on the display plate. Therefore, when the emission part is inclined toward the inner side of the ring as it goes to the display direction, the light line that is the reflected image is inclined toward the inner side of the ring as it goes in the direction opposite to the display direction. In this way, the line of light projected as if it extends from the display surface to the back side as it goes toward the inner side of the ring can make the viewer feel the depth. Therefore, the display device can form a display with a further three-dimensional effect by the light lines projected with inclination with respect to the display surface of the display board.

The invention according to claim 2 is characterized in that the emitting portion is curved so that the inclination toward the inner side of the ring increases toward the display direction.

  When the emission part is inclined with respect to the display direction as in the present invention, the light traveling in the scale member along the display surface of the display plate is reflected by the emission part and emitted from the emission part. May be difficult. Therefore, the emitting part is curved so that the inward inclination becomes larger toward the display direction. Thereby, the range which reflects the light which advances the inside of a scale member along a display surface among output parts can be narrowed. Therefore, the amount of light that is reflected by the emitting portion can be reduced. As a result, the amount of light emitted from the emitting portion toward the display surface increases, so that light lines are clearly displayed on the display surface. Therefore, the display device can form a display with a three-dimensional effect.

The invention according to claim 3 is characterized in that a plurality of grooves extending along an annular circumferential direction are formed on the display surface.

  According to this invention, the plurality of grooves extending along the annular circumferential direction can reflect the light emitted from the emitting portion toward the annular central portion in the display direction by the inner wall surface of the groove. By forming a plurality of such grooves on the display surface, the amount of light reflected in the display direction by the display surface can be increased. As a result, the amount of light reflected toward the viewer by the display surface is increased, so that light lines are clearly displayed on the display surface. Therefore, the display device can form a display with a three-dimensional effect.

In the invention according to claim 4 , the scale member is made of a light-transmitting material, and the display board is positioned on the same plane as the display surface so as to overlap the scale member in the display direction, and the light from the light source is emitted. It has a light emitting portion that emits light by emitting in the display direction.

  According to this invention, the light emitted in the display direction from the light emitting unit located on the same plane as the display surface passes through the translucent scale member that overlaps the light emitting unit in the display direction and is visually recognized by the viewer. The The light emitting part that emits light at a position overlapping the scale member in the display direction forms a display as if the light line from the emitting part of the scale member toward the annular central part is extended outside the annular part. Thereby, since the spread of the light line is further emphasized, the stereoscopic effect of the display by the display device is further improved.

Further, when combined with the configuration of claim 1 , a light emitting unit that emits light on the same plane as the display surface, and a light line as if extending from the display surface to the back side toward the inner side of the ring The contrast enhances the depth along the display direction. Therefore, the stereoscopic effect of display by the display device is further certain.

In a fifth aspect of the present invention, the scale member has a reflecting portion that is positioned in the display direction with respect to the display surface and reflects light incident from the incident portion toward the display direction.

  According to this invention, the reflection part is visually recognized as if it is emitting light by reflecting light toward the display direction. In this way, the reflecting portion that emits light at a position in the display direction with respect to the display surface and the light line projected on the display surface are shifted from each other in the display direction. Therefore, the depth along the display direction is emphasized by the comparison between the reflection portion and the light line. Therefore, the stereoscopic effect of the display by the display device is further certain.

The invention according to claim 6 is characterized in that a connecting portion for connecting all the scale members in an annular circumferential direction is formed integrally with the plurality of scale members.

  According to this invention, the direction of the light radiate | emitted by each output part of each scale member can be prescribed | regulated accurately by connecting all the scale members to the cyclic | annular circumferential direction by the connection part. Therefore, each line of light can be accurately directed from each emission part of each scale member to the annular center part. Thus, since the direction of the light line projected on the display surface can be accurately defined, the stereoscopic effect of the display acquired by the spread of the light line is further ensured.

The invention described in claim 7 further includes a pointer that indicates a scale displayed on the display board by rotating along the display surface.

  According to the present invention, the pointer that rotates along the display surface and the line of light projected on the display surface are shifted from each other in the display direction. Therefore, the depth along the display direction is emphasized by contrast between the rotating pointer and the light line. Therefore, the stereoscopic effect of the display by the display device is further certain.

In the invention according to claim 8 , the pointer has a rotation center portion which is a rotation center of the pointer and is located at the annular center portion, and the rotation center portion extends annularly along the rotation direction of the pointer. A pointer reflecting portion that reflects light emitted from the emitting portion in the display direction is formed.

  According to the present invention, the center of rotation of the pointer that rotates along the display surface and the line of light projected on the display surface are shifted from each other in the display direction. In addition, the pointer reflecting portion is visually recognized as if it is emitting light by reflecting the light emitted from the emitting portion toward the display direction. As described above, the depth along the display direction is emphasized by comparing the pointer reflecting portion that emits light with the line of light. Therefore, the stereoscopic effect of the display by the display device is further certain.

  In addition, the center of rotation that is the center of rotation of the pointer continues to be positioned at the center of the ring even when the pointer rotates. Further, even if the pointer is rotated by the pointer reflecting portion that extends annularly along the rotation direction of the pointer, the pointer reflecting portion continues to reflect the light emitted from the emitting portion in the display direction. As described above, in the visual recognition, the portion visually recognized as if light is emitted by the reflection of light by the pointer reflecting portion does not move by the rotation of the pointer. This facilitates the comparison between the pointer reflecting portion that emits light and the light line, so that the depth along the display direction is easily perceived by the viewer. Therefore, the stereoscopic effect of the display by the display device is more certain.

It is a front view of the combination meter by one Embodiment of this invention. It is a figure which shows the mechanical structure of the combination meter by one Embodiment of this invention, Comprising: It is the II-II sectional view taken on the line of FIG. It is a block diagram which shows the electric constitution of the combination meter by one Embodiment of this invention. It is a figure for demonstrating the structure of the scale part which is the characterizing part of this invention, Comprising: It is an enlarged view of the IV section of FIG. It is a figure for demonstrating the structure of the boss | hub cap which is a characteristic part of this invention, Comprising: It is an enlarged view of the part of V of FIG. It is a perspective view for demonstrating the shape of a scale light guide.

  Hereinafter, an embodiment of the present invention will be described with reference to the drawings.

  FIG. 1 is a front view of a combination meter 100 according to an embodiment of the present invention. FIG. 2 is a cross-sectional view for explaining the structure of the combination meter 100. The combination meter 100 is accommodated in an instrument panel provided in the vehicle interior of the vehicle, and is disposed with the front side shown in FIG. 1 facing the driver's seat side.

  The combination meter 100 is a display device that displays various information related to the vehicle. As shown in FIG. 1, the combination meter 100 includes a speedometer 20 and instruments such as a tachometer, a water temperature meter, and a fuel meter (not shown).

  The display of the speedometer 20 includes a display board 30, a pointer 40, a turning member 39, and the like. The display board 30 is formed in a disk shape. The display board 30 displays a plurality of main scales 32, auxiliary scales 34, numbers 36, and the like on the display surface 30a in the display direction. The plurality of main scales 32 and auxiliary scales 34 are arranged in an annular manner along the outer edge of the display panel 30 at equal intervals. The numeral 36 is a design imitating a numeral for representing the speed of the vehicle, and is located on the radially inner side of the main scale 32 arranged in a display ring shape. The pointer 40 indicates the main scale 32 and the auxiliary scale 34 displayed on the display surface 30a by rotating along the display surface 30a. The facing member 39 surrounds the outer edge of the display board 30 and shows the boundary between the speedometer 20 and another instrument of the combination meter 100 on the display. The speedometer 20 displays the main scale 32, the auxiliary scale 34, the numeral 36, and the pointer 40 in a light emitting display in an environment with little extraneous light.

  Next, the mechanical configuration of the combination meter 100 will be described with reference to FIGS.

  The combination meter 100 includes a circuit board 80, the above-described display plate 30, a turning member 39, a pointer 40, a light guide plate 60, and a reflector 70. The combination meter 100 is housed in a casing (not shown) configured by assembling a plurality of case members, a transparent front panel, and the like, and is protected from dust and dirt in the atmosphere. ing.

  The circuit board 80 is, for example, a paper phenolic or glass epoxy hard substrate. A wiring pattern (not shown) made of a predetermined copper foil material is formed on both surfaces of the circuit board 80. The circuit board 80 is provided with a pointer opening 81 penetrating along the display direction. A plurality of electronic components connected to the wiring pattern, specifically, a stepper motor 87, a scale illumination LED 83, a pointer illumination LED 84, a meter control unit 85, and the like are mounted on the circuit board 80.

  The stepper motor 87 has a rotor that rotates in synchronization with the input pulse power, a pointer shaft 88 that is integral with the rotor, and a motor housing (not shown) that houses a mechanism such as a rotor and a magnet. ing. The pointer shaft 88 of the stepper motor 87 rotates to a desired angle in the direction to rotate in accordance with the input pulse power. The stepper motor 87 is disposed on the side opposite to the display direction of the pointer opening 81 provided on the circuit board 80 (hereinafter referred to as the back side), and the tip of the pointer shaft 88 extends in the display direction through the pointer opening 81. It is protruding.

  The scale illumination LED 83 and the pointer illumination LED 84 are semiconductor elements that convert electrical energy into light energy. The scale illumination LED 83 emits light having, for example, a white light source color when a voltage is applied. The scale illumination LED 83 is disposed on the back side of the light guide plate 60 and emits light in the display direction. The pointer illumination LED 84 emits light having, for example, a red light source color when a voltage is applied. The pointer illumination LED 84 is disposed on the periphery of the pointer opening 81 on the surface of the circuit board 80 in the display direction. In addition, the light source color of the light emitting diode used as LED 83 for scale illumination and LED 84 for pointer illumination is not limited to said color, You may select suitably.

  The display board 30 is formed in a disk shape with a translucent material such as colorless and transparent polycarbonate. The display board 30 is formed by performing light-shielding printing on the surface of a sheet material such as polycarbonate molded to a thickness of about 0.5 millimeters. In the display board 30, the auxiliary scale 34, the numeral 36, and the portion corresponding to the outer peripheral light emitting portion 32a described later are subjected to translucent printing instead of the light shielding printing, or the light shielding printing is omitted. By doing so, it becomes a translucent part. The light transmissive portion can emit light by transmitting light emitted from the light guide plate 60 provided in a direction opposite to the display direction of the display plate 30 (hereinafter referred to as a back direction). Further, a circular pointer opening 31 concentric with the display plate 30 is formed at the central portion in the radial direction of the display plate 30.

  The pointer 40 is formed by combining a pointer member 41 formed of a light-transmitting material such as a colorless and transparent acrylic resin and a boss cap 43 formed of a light-shielding resin material such as a polyacetal resin. It is configured.

  The pointer member 41 includes a pointer light emitting portion 41 a that extends along the radial direction of the display panel 30 and a fixing portion 42. The pointer member 41 causes the light emitted from the pointer illumination LED 84 in the display direction to be incident on the inside of the pointer member 41 and is emitted from the pointer light emitting unit 41a in the display direction. Thereby, the pointer light emitting unit 41a emits light. The fixing part 42 fixes the pointer 40 to the pointer shaft 88 by being externally fitted to the pointer shaft 88 of the stepper motor 87. The pointer 40 fixed by the fixing unit 42 is driven by the stepper motor 87 and rotates along the display surface 30a.

  The boss cap 43 is positioned at the center of the main scale 32 arranged in an annular shape, which is the rotation center of the pointer 40. The boss cap 43 is formed such that its outer diameter is larger than the inner diameter of the pointer opening 31 of the display plate 30. The boss cap 43 covers the fixed portion 42 of the pointer member 41 and the pointer opening 31 of the display plate 30 so that they are not visible from the front side.

  The facing member 39 is an annular member formed of, for example, a resin material. An area visible from the front side of the turning member 39 is plated with a metal material for the purpose of improving the appearance of the combination meter 100.

  The light guide plate 60 is formed in a disk shape from a light-transmitting material such as a colorless and transparent acrylic resin. The light guide plate 60 is disposed on the back side of the display plate 30. The light guide plate 60 has an incident portion 61 for causing the light of the scale illumination LED 83 to enter the light guide plate 60. The incident portion 61 protrudes from the back side surface of the light guide plate 60 in the back direction. The incident portion 61 faces the scale illumination LED 83 in the display direction.

  The reflector 70 is disposed on the back side of the light guide plate 60 and supports the light guide plate 60 from the back side. The reflector 70 prevents light incident on the light guide plate 60 from leaking outside. The reflector 70 is formed, for example, by applying white paint on the outer surface of a molded resin member.

  Next, the electrical configuration of the combination meter 100 will be described with reference to FIG.

  The combination meter 100 is electrically configured by a meter control unit 85, a stepper motor 87, a scale illumination LED 83, a pointer illumination LED 84, and the like. The combination meter 100 is connected to an external battery 95, an ignition relay 94, a vehicle-mounted local area network (in-vehicle LAN) 91, and a grounded ground wiring 98.

  The meter control unit 85 is a microcomputer that operates according to a program. The meter control unit 85 is supplied with power from the battery 95. The meter control unit 85 is connected to an in-vehicle LAN 91 that is mounted on the vehicle, and acquires information related to the vehicle output to the in-vehicle LAN 91, such as the traveling speed of the vehicle, the ON / OFF state of the ignition switch 93, and the like. The meter control unit 85 is connected to the scale illumination LED 83 and the pointer illumination LED 84LED 83a, and emits light by applying a voltage to these LEDs. The meter control unit 85 is connected to the stepper motor 87, and calculates the rotation direction, rotation angle, and rotation speed of the pointer shaft 88 (see FIG. 2) to be rotated based on the acquired information on the traveling speed of the vehicle. . Then, the meter control unit 85 outputs pulse power corresponding to the calculation result to the stepper motor 87 and drives the pointer shaft 88.

  A power supply control circuit 92 is provided on the in-vehicle LAN 91 connected to the combination meter 100. The power supply control circuit 92 detects a pressing operation of the ignition switch 93 by the driver, applies a voltage to the ignition relay 94, and puts the relay 94 in an energized state. In addition, the power supply control circuit 92 outputs information related to the ON / OFF state of the ignition of the vehicle on the in-vehicle LAN 91 based on the detected pressing operation of the ignition switch 93 by the driver.

  According to the operation of the combination meter 100 described above, the light emission display of the pointer light emitting part 41a of the pointer 40 shown in FIG. 1 and the transmitted illumination of the main scale 32, the auxiliary scale 34, and the numeral 36 are performed. Further, the tip of the pointer 40 indicates one of the plurality of main scales 32 and auxiliary scales 34 by the rotation of the pointer shaft 88 to an angle corresponding to the vehicle speed. As a result, a pointer display corresponding to the traveling speed of the vehicle is formed on the speedometer 20.

(Characteristic part)
Hereinafter, the characteristic part of the combination meter 100 by one Embodiment of this invention is demonstrated in detail based on FIG. 1, 2 and FIGS.

  The combination meter 100 further includes a scale light guide 50. The scale light guide 50 is made of a translucent material such as a colorless and transparent acrylic resin. The scale light guide 50 has a plurality of scale parts 51 and connecting parts 59.

  As shown in FIGS. 1, 2, and 4, the plurality of scale portions 51 are arranged in the display direction of the display panel 30 in a state of being spaced apart from each other. A plurality of main scales 32 displayed on the display board 30 are formed by the plurality of scale parts 51. Each scale portion 51 has an incident surface 52, a first reflecting surface 53, a second reflecting surface 54, a third reflecting surface 55, an exit surface 56, and a top surface 57.

  The incident surface 52 is a structure for causing light to enter the scale portion 51. The incident surface 52 faces the outer peripheral surface of the light guide plate 60. Light that is emitted radially outward from the light guide plate 60 is incident on the incident surface 52.

  The first reflecting surface 53 is formed at a position overlapping the incident surface 52 in the radial direction. The first reflecting surface 53 is inclined outward in the radial direction as it goes in the display direction. The first reflecting surface 53 reflects light that is incident on the incident surface 52 toward the outer side in the radial direction in the display direction.

  The second reflecting surface 54 is formed in the display direction of the first reflecting surface 53. The second reflecting surface 54 is positioned so as to overlap the first reflecting surface 53 in the display direction. The second reflecting surface 54 is inclined inward in the radial direction as it goes in the display direction. The second reflecting surface 54 reflects light reflected by the first reflecting surface 53 in the display direction mainly radially inward.

  The third reflecting surface 55 is located in the display direction with respect to the display surface 30 a and is continuous with the top surface 57. The third reflecting surface 55 is formed on the radially inner side of the second reflecting surface 54. The third reflecting surface 55 is positioned so as to overlap the second reflecting surface 54 in the radial direction. The third reflecting surface 55 is inclined inward in the radial direction as it goes in the display direction. The third reflecting surface 55 is incident on the scale 51 from the incident surface 52 and reflects the light reflected by the first reflecting surface 53 and the second reflecting surface 54 toward the display direction.

  The emission surface 56 is formed inside the second reflection surface 54 in the radial direction. The exit surface 56 is incident on the scale portion 51 from the entrance surface 52 and is reflected by the first reflecting surface 53 and the second reflecting surface 54 and travels radially inwardly along the main scale 32 arranged in an annular shape. The light is emitted toward the central part. As a result, the emission surface 56 projects the light line 10 on the display surface 30 a of the display plate 30. The emission surface 56 is inclined toward the inner side of the main scale 32 arranged in a ring as it goes in the display direction.

  In addition, the emission surface 56 is curved so that the inclination toward the inner side of the ring increases as it goes in the display direction. When the emission surface 56 is inclined with respect to the display direction, the light traveling in the scale portion 51 along the display surface 30 a is reflected in the display direction by the emission surface 56 and is not easily emitted from the emission surface 56. This is because there is a possibility of becoming. More specifically, in order to suppress reflection on the exit surface 56, the exit surface 56 is preferably along the display direction. As described above, by curving the emission surface 56, the surface direction in the range of the emission surface 56 that is closer to the display surface 30a than the top surface 57 approximates the display direction. As a result, the range along the display direction on the emission surface 56 is enlarged, so that the light traveling toward the center of the ring along the display surface 30 a is easily emitted from the emission surface 56.

  The top surface 57 is a smooth plane located in the most display direction of the scale unit 51. The light reflected in the display direction by the third reflecting surface 55 is emitted from the top surface 57, and is visually recognized by a viewer such as a driver. Further, light emitted in the display direction from an outer peripheral light emitting portion 32 a of the display plate 30 described later also travels through the scale portion 51 and is emitted from the top surface 57 so as to be visually recognized by a viewer. The viewer can visually recognize the third reflecting surface 55 and the outer peripheral light emitting portion 32 a through the top surface 57.

  As shown in FIG. 6, the connecting portion 59 is formed integrally with a plurality of scale portions 51 arranged in a ring shape. The connection part 59 has connected all the scale parts 51 to the cyclic | annular circumferential direction.

  The display board 30 has the outer periphery light emission part 32a and the hairline part 37, as FIG.1, 2 and FIG.4 shows.

  The outer peripheral light emitting unit 32a is positioned so as to overlap the scale unit 51 in the display direction on the same plane as the display surface 30a. The outer peripheral light emitting part 32a is a transmission part of the display board 30 like the auxiliary scale 34 and the numeral 36 described above. The outer peripheral light emitting unit 32a emits light by emitting light from the scale illumination LED 83 supplied by the light guide plate 60 in the display direction. The light emitted from the outer peripheral light emitting part 32 a in the display direction passes through the inside of the scale part 51 and is emitted from the top surface 57 of the scale part 51.

  The hairline part 37 is formed over the entire display surface 30 a of the display board 30. Specifically, the hairline portion 37 is formed by a plurality of fine grooves 38 extending along the circumferential direction of the main scales 32 arranged in an annular shape. Each groove 38 is formed concentrically with each other. The wall surface 38a of each groove 38 is inclined with respect to the display direction so that the width of the groove 38 becomes narrower toward the back direction.

  The light guide plate 60 has a main emission part 63 and an auxiliary emission part 65 in order to supply light emitted from the scale illumination LED 83 to the scale part 51 and the outer peripheral light emitting part 32a.

  The main emitting portion 63 is an outer peripheral surface of the light guide plate 60 formed in a disk shape, and faces each incident surface 52 of each scale portion 51 in the radial direction. The main emission part 63 emits light emitted from the scale illumination LED 83 and incident on the inside of the light guide plate 60 from the incident part 61 to the outside in the radial direction. Light emitted from the main emission part 63 is received by each incident surface 52. In this way, the light guide plate 60 guides the light emitted from the scale illumination LEDs 83 to each incident surface 52 formed in each scale portion 51.

  The auxiliary emitting portion 65 is formed on the surface of the light guide plate 60 in the display direction. The auxiliary emitting part 65 is provided at a position overlapping the outer peripheral light emitting part 32 a of the display plate 30 on the outer edge of the light guide plate 60. The auxiliary emitting unit 65 emits light emitted from the scale illumination LED 83 and incident from the incident unit 61 into the light guide plate 60 in the display direction. The light emitted from the auxiliary emitting unit 65 is received by each outer peripheral light emitting unit 32a. As described above, the light guide plate 60 guides the light emitted from the scale illumination LED 83 to each of the outer peripheral light emitting units 32a.

  The boss cap 43 of the pointer 40 is formed with a pointer reflecting surface 44 as shown in FIGS. The pointer reflecting surface 44 extends in an annular shape along the rotation direction of the pointer 40. The pointer reflecting surface 44 is a conical curved surface having an inner diameter that decreases toward the display direction. The pointer reflecting surface 44 is inclined with respect to the display direction, and reflects light emitted from the emission surface 56 in the display direction. In addition, the pointer reflecting surface 44 is plated with a metal material in order to increase the light reflectance of the pointer reflecting surface 44.

  With the above configuration, as shown in FIGS. 1, 2, 4, and 5, a speedometer is formed by the spread of a plurality of light lines 10 from the center of the display surface 30 a toward the exit surface 56 of each scale unit 51. The display of 20 is given a three-dimensional effect. In addition, the light line 10 projected on the display board 30 is a reflection image of the emission surface 56 that is reflected by the display board 30. Therefore, when the exit surface 56 is inclined toward the inside of the ring as it goes in the display direction as in the present embodiment, the light line 10 that is the reflected image is in the radial direction as it goes in the direction opposite to the display direction. It becomes a mode inclined to the inside. As a result, the light line 10 is projected as if it extends from the display surface 30a to the inner side of the main scale 32 arranged in a ring (see the two-dot chain line in FIGS. 2 and 4). Note that the brightness of the light line 10 indicated by a broken line in FIG. 1 decreases toward the inner side of the main scale 32 arranged in a ring shape.

  Moreover, the outer periphery light emission part 32a contained in the main scale 32 is light-emitted on the same plane as the display board 30, when the light radiate | emitted in a display direction is visually recognized by the viewer through the translucent scale part 51. Perceived as. As described above, the outer peripheral light emitting portion 32a located on the display surface 30a and the light line 10 extending from the display surface 30a to the far side are shifted from each other in the display direction.

  In addition, the third reflecting surface 55 included in the main scale 32 is more visible at a position in the display direction than the display surface 30a when light reflected in the display direction is visually recognized by the viewer through the top surface 57 of the scale portion 51. Perceived as emitting light. Thus, the third reflecting surface 55 positioned in the display direction of the display surface 30a and the light line 10 projected on the display surface 30a are shifted from each other in the display direction.

  Furthermore, the pointer reflecting surface 44 is perceived as if it is emitting light at a position in the display direction rather than the display surface 30a by reflecting light toward the display direction. The pointer reflecting surface 44 positioned in the display direction of the display surface 30a and the light line 10 projected on the display surface 30a are shifted from each other in the display direction. Similarly, the pointer light emitting portion 41a of the pointer 40 rotating along the display plate 30a and the light line 10 are also shifted from each other in the display direction.

  According to the above, in the display of the speedometer 20, the third reflecting surface 55, the pointer reflecting surface 44, the pointer light emitting portion 41a, the outer peripheral light emitting portion 32a, and the light line 10 are sequentially shifted from each other in the display direction. It becomes.

  In the present embodiment described so far, the light guide plate 60 guides light emitted from the scale illumination LEDs 83 to the respective incident surfaces 52 of the plurality of scale portions 51. Therefore, even if the number of scale illumination LEDs 83 is smaller than the number of scale sections 51, the light emitted by the scale illumination LEDs 83 is supplied to each scale section 51. As described above, it is possible to increase the number of scale portions 51 that can be provided in the speedometer 20 while suppressing an increase in the number of scale illumination LEDs 83.

  In addition, by increasing the number of scale parts 51, the number of light lines 10 projected on the display surface 30a of the display panel 30 also increases. Therefore, the light line 10 spreading from the annular central portion toward each emission surface 56 can be seen more clearly. As described above, the stereoscopic effect imparted to the display of the speedometer 20 by the spread of the light line 10 is further ensured.

  Therefore, the combination meter 100 can form a three-dimensional display with a small number of scale lighting LEDs 83.

  In addition, in this embodiment, the light lines 10 projected as if extending from the display surface 30a to the back side can be made to feel the depth toward the inner side of the main scales 32 arranged in a ring. As described above, the combination meter 100 can form a display of the speedometer 20 having a three-dimensional effect by the light line 10 projected toward the back side with respect to the display surface 30a of the display board 30.

  Further, in the present embodiment, by curving the emission surface 56, it is possible to narrow a range of the emission surface 56 that reflects light traveling in the scale portion 51 along the display surface 30a. Therefore, the amount of light that is reflected by the exit surface 56 can be reduced. As a result, the amount of light emitted from the emission surface 56 toward the display surface 30a increases, so that the light line 10 is clearly displayed on the display surface 30a. Therefore, the combination meter 100 can form a display of the speedometer 20 having a three-dimensional effect.

  Further, in the present embodiment, the third reflecting surface 55 of the scale portion 51, the pointer reflecting surface 44 of the pointer 40, the pointer light emitting portion 41a of the pointer 40, the outer peripheral light emitting portion 32a of the display surface 30a, and the back from the display surface 30a. The light lines 10 extending to the side are shifted from each other in the display direction. The depth along the display direction is emphasized by the comparison of the third reflecting surface 55, the pointer reflecting surface 44, the pointer light emitting portion 41a, the outer peripheral light emitting portion 32a, and the light line 10 that are visible to the viewer. Therefore, the stereoscopic effect of the display of the speedometer 20 is further certain.

  In addition, in the present embodiment, the plurality of grooves 38 forming the hairline portion 37 can reflect the light emitted from the emission surface 56 in the display direction by the wall surface 38 a of the groove 38. By forming a plurality of such grooves 38 on the display surface 30a, the amount of light reflected in the display direction by the display surface 30a can be increased. As described above, the light line 10 is clearly displayed on the display surface 30a. Therefore, the combination meter 100 can form a display of the speedometer 20 having a three-dimensional effect.

  In addition, in the present embodiment, the outer peripheral light emitting portion 32a that emits light at a position that overlaps the scale portion 51 in the display direction is displayed as if the light line 10 extending in the radial direction of the speedometer 20 is extended outside the ring. Form. In addition, the portion of the boss cap 43 that is visually recognized as if light is emitted by the reflection of light by the pointer reflecting surface 44 forms a display as if the light line 10 is further extended toward the center. As a result, the spread of the light line 10 is further emphasized, so that the stereoscopic effect of the display of the speedometer 20 is further improved.

  Furthermore, in this embodiment, since all the scale parts 51 are connected in the circumferential direction by the connecting part 59, the direction of the light emitted by each emission surface 56 can be defined with high accuracy. Therefore, each light line 10 can be accurately directed from each exit surface 56 to the center of the ring. In this way, since the direction of the light line 10 projected on the display surface 30a can be accurately defined, the stereoscopic effect of the display of the speedometer 20 acquired by the spread of the light line 10 becomes more reliable. .

  Furthermore, in this embodiment, even if the pointer 40 rotates, the boss cap 43 continues to be positioned at the center of the main scale 32 arranged in an annular shape. Further, even if the pointer 40 is rotated by the pointer reflecting surface 44 that extends in an annular shape along the rotation direction of the pointer 40, the pointer reflecting surface 44 continues to reflect the light emitted from the emitting surface 56 in the display direction. As described above, the portion that is visually recognized as if light is emitted by the reflection of light by the pointer reflecting surface 44 does not move due to the rotation of the pointer 40. This facilitates the comparison between the light emitting portion of the pointer reflecting surface 44 that is shifted in the display direction and the light line 10, and the depth along the display direction is easily perceived by the viewer. Therefore, the stereoscopic effect of the display of the speedometer 20 becomes more certain.

  In the present embodiment, the main scale 32 corresponds to the “scale” recited in the claims, the outer peripheral light emitting portion 32a corresponds to the “light emitting portion” recited in the claims, and the boss cap 43 is patented. The pointer reflecting surface 44 corresponds to the “pointer reflecting portion” described in the claims, and the scale portion 51 corresponds to the “scale member” described in the claims. The incident surface 52 corresponds to the “incident part” described in the claims, the third reflecting surface 55 corresponds to the “reflecting part” described in the claims, and the exit surface 56 corresponds to the patent. The light guide plate 60 corresponds to the “light guide” described in the claims, and the scale illumination LED 83 corresponds to the “light source” described in the claims. The combination meter 100 corresponds to the “display device” described in the claims. This is.

(Other embodiments)
As mentioned above, although one embodiment by the present invention was described, the present invention is not interpreted limited to the above-mentioned embodiment, and can be applied to various embodiments within the range which does not deviate from the gist.

  In the above embodiment, the emission surface 56 is inclined with respect to the display direction and is curved. However, the shape of the emission part that emits light is not limited to the shape like the emission surface 56 described above. For example, the emitting portion may be a flat inclined surface that is inclined inward in the radial direction toward the display direction. Alternatively, the emitting portion may be a plane along the display direction.

  In the said embodiment, the hairline part 37 was formed in the whole display surface 30a. However, the display surface 30a may not have the above-described configuration as long as the light emitted from the emission surface 56 can be reflected in the display direction. For example, the display surface may be a bright flat surface capable of reflecting light. Alternatively, a gradation that changes in lightness or saturation in the radial direction may be formed on the display surface by printing or the like.

  In the above embodiment, the outer peripheral light emitting portion 32 a is formed on the outer edge of the display plate 30 so as to overlap the scale portion 51 in the display direction. Further, the scale portion 51 has a third reflecting surface 55 that reflects light in the display direction. Further, the boss cap 43 has a pointer reflecting surface 44 formed thereon. The outer peripheral light emitting portion 32a, the third reflecting surface 55, and the pointer reflecting surface 44 are not necessarily formed, and may be omitted as appropriate.

  In the above embodiment, all the scale parts 51 are connected to each other by the connecting part 59. However, the scale members do not have to be connected to each other. The scale member may be fixed to the light guide, the display plate, or the like as long as the direction in which light is emitted can be accurately defined.

  In the above embodiment, the present invention is applied to explain the example of improving the stereoscopic effect of the speedometer that displays the traveling speed of the vehicle. However, the present invention is applicable to all display devices that display scales. can do. The present invention may be applied to a display device mounted on a vehicle, for example, a tachometer, a fuel gauge, a water temperature gauge, and the like.

10 light lines, 20 speedometer, 30 display board, 30a display surface, 31 pointer opening, 32 main scale (scale), 32a outer peripheral light emitting section (light emitting section), 34 auxiliary scale, 36 numerals, 37 hairline section, 38 Groove, 38a wall surface, 39 facing member, 40 pointer, 41 pointer member, 41a pointer light emitting portion, 42 fixing portion, 43 boss cap (rotation center portion), 44 pointer reflecting surface (pointer reflecting portion), 50 scale light guide, 51 scale part (scale member), 52 incident surface (incident part), 53 first reflective surface, 54 second reflective surface, 55 third reflective surface (reflective part), 56 exit surface (exit part), 57 top surface, 59 connecting part, 60 light guide plate (light guide), 61 incident part, 63 main emitting part, 65 auxiliary emitting part, 70 reflector, 80 circuit board, 81 pointer opening, 83 scale illumination LED (light source) 84 Indicator LED, 85 Meter Control Unit, 87 Stepper Motor, 88 Pointer Shaft, 91 LAN in Car, 92 Power Supply Control Circuit, 93 Ignition Switch, 94 Ignition Relay, 95 Battery, 98 Ground Wiring, 100 Combination Meter ( Display device)

Claims (8)

A display board having a display surface for displaying a plurality of scales arranged in a ring;
A plurality of graduations are formed by disposing a plurality of graduations in the display direction of the display plate at an interval from each other, and an incident part for allowing light to enter, and light incident from the incident part to the annular central part A scale member having an exit part that projects light lines on the display surface by exiting toward the display surface,
A light source that emits light supplied to the scale member;
A light guide that guides the light emitted from the light source to each of the incident portions of the plurality of scale members , and
The emission section, a display device which is characterized that you inclined inwardly of the annular extent toward the display direction. 2. The display device according to claim 1, wherein the emitting portion is curved so that an inclination toward the inner side of the annular shape increases toward a display direction. Wherein the display surface, the display device according to claim 1 or 2, characterized in Rukoto plurality of grooves extending along the circumferential direction of the annular is formed. The scale member is formed of a translucent material,
The display board is
Claims wherein the display surface on the same plane positioned so as to overlap the scale member and the display direction, and wherein the Rukoto that having a light emitting portion, which emits light by emitting light from the light source to the display direction The display apparatus as described in any one of 1-3. The scale member,
5. The display according to claim 1 , further comprising: a reflective portion that is positioned in a display direction with respect to the display surface and reflects light incident from the incident portion toward the display direction. 6. apparatus. All of the scale member, connecting portion for connecting the circumferential direction of the annular display device according to any one of claims 1 to 5 is formed integrally with a plurality of said scale member, characterized in Rukoto . Wherein by rotating along the display surface, the display device according to any one of claims 1 to 6, wherein guidance, further comprising Rukoto a pointing to the scales to be displayed on the display panel. The guidelines are:
A center of rotation of the pointer that is located at the center of the ring,
The center of rotation is
Annularly extending along the rotational direction of the pointer, display device according to claim 7, characterized that you form a pointer reflecting unit, which reflects the display direction of light emitted from the emitting portion.

Images