JP2013242266A - Display device for instrument - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a display device for an instrument capable of suppressing a luminance spot of each design part while securing narrow display space by a gap between the design parts adjacent to each other.SOLUTION: At a back face side of a visible face of a dial plate 10 for an instrument, a first design part 11b makes light of a first light source 21 coming in from an end part in the longitudinal direction of a first light guide body 31 transmissively illuminate via guiding light in the direction along the dial plate 10 for an instrument and scattering the light. Also, a second design part 12a guides light of a second light source 22a which is disposed by being displaced from the second design part 12a to the first design part 11b side from the direction that is different from the light guide in the direction along the dial plate 10 for an instrument, and it also transmissively illuminates the second design part 12a by making the light of the second light source reflect in a light guide space which is surrounded by wall parts 42 and 43 capable of reflecting light and by guiding the light.

Description

  The present invention relates to an instrument display device that transmits and illuminates a design portion of an instrument using a light source.

  Conventionally, a vehicular meter device having a light guide for each of a plurality of design portions is known (for example, Patent Document 1).

  Specifically, the vehicle meter device of Patent Document 1 includes an instrument dial having a plurality of light-transmissive design portions (numbers, letters, scales) and a plurality of design portions for transmitting and illuminating each of them. The light emitting diodes (light sources) respectively disposed immediately below the back surface of the design portion are further reflected between the light emitting diodes corresponding to the design portions and the light emitting diodes toward the design portion. Light guides each having a reflective surface are interposed. Thereby, since the light of each light emitting diode is efficiently guided to each design part via a light guide formed in a plurality of divisions corresponding to each design part, the luminance illumination of the design part can be enhanced. it can.

JP 11-190640 A

  In recent years, there has been a demand for switching and displaying a plurality of different display contents in the display area of one meter. For example, in a meter display device for a hybrid vehicle, two display contents can be provided in one meter with a limited display area by switching and displaying the output power of the engine and the engine speed.

  Therefore, problems that occur when trying to realize such a display device that switches and displays a plurality of different display contents in the display area of one meter using the technique of Patent Document 1 will be discussed below.

  First, in the technique of Patent Document 1, it is physically impossible to switch and display design portions having different display contents, such as a liquid crystal display device, by superimposing them on the same display area in the meter. Therefore, it is necessary to arrange the design portions having different display contents and the light emitting diodes provided on the back surfaces thereof adjacent to each other (= arranged). A light guide is provided between each design portion adjacent to (approaching) and each light emitting diode.

  However, when the design parts adjacent to each other want to display different display contents, the light guide provided on the back surface of each design part has a size that can sufficiently transmit the illumination of the target design part, and can guide the light. It is necessary to consider a margin for misalignment when the light body and the instrument dial are assembled in manufacturing (that is, a space necessary for light diffusion and a space for separating the light guide body are required) ).

  Therefore, there is a problem that a large display space is required between the adjacent design portions (that is, the display space between the design portions cannot be reduced due to the presence of the light guide).

  Therefore, it is possible to remove the light guide, but in this case, if a light emitting diode is placed opposite to the back of the design part, the central part of the design part that is illuminated and illuminated is displayed brightly and the peripheral part is displayed darkly, resulting in luminance spots. There is a problem to do.

  In particular, the above-described problem can be more prominent when design portions having different display contents are arranged in a single meter and arranged side by side so as to switch and display a plurality of display contents.

  In view of the above problems, an object of the present invention is to provide an instrument display device capable of suppressing luminance unevenness in a design portion while securing a narrower display space between adjacent design portions.

  In order to solve the above-described object, the instrument display device according to claim 1 transmits the first design part to the instrument dial having the first design part and the second design part adjacent to the first design part. A first light source for illuminating and a second light source for transmitting and illuminating the second design portion; and further, in a direction along the dial of the instrument by light incident from an end in the longitudinal direction of the first light guide. The first light guide means for transmitting and illuminating the first design part through the light guide and scattering, and the second light source are disposed displaced from the second design part to the first design part side, and the second light source Second light guide means for guiding light from a direction different from the light guide direction along the instrument dial and transmitting and illuminating the second design portion is provided on the back side of the viewing surface of the instrument dial, respectively. It has been.

  In addition, the second light guide means is formed as a light guide space surrounded by a wall portion that can reflect light, and reflects the light of the second light source on the wall portion so as to transmit and illuminate the second design portion. It is a feature.

  According to the above configuration, since the light guide is not provided in parallel with the first light guide on the back side of the second design portion, it is possible to secure a narrow display space between the design portions adjacent to each other (≈close).

  Further, the second light guide means transmits and illuminates the second design portion by reflecting the light of the second light source on the wall portion in the light guide space. In other words, by using this wall portion, it is possible to transmit and illuminate the second design portion without directly applying the light of the second light source, and thus it is possible to suppress the luminance unevenness of the second design portion. .

  Accordingly, it is possible to suppress the uneven brightness of the design portions while securing a narrower display space between the adjacent design portions.

  Furthermore, the second light source that guides light from a direction different from the light guide in the direction along the instrument dial (such as light from the first light source) is displaced from the second design part to the first design part side. Since the space on the back surface of the instrument display board can be used in a compact manner, for example, the first design portion or the second design portion and the other design portions are arranged closely together. Even in such a case, a narrow display space can be secured between the design portions.

  The wall portion of the instrument display device according to claim 2 is formed to be inclined with respect to the instrument dial so as to guide light from the second light source to the second design portion.

  According to the above configuration, the light of the second light source can be easily reflected toward the second design portion side due to the inclination of the wall portion, and thus the second design portion is transmitted and illuminated efficiently by condensing the light guide space. Therefore, luminance illumination can be increased.

  The wall portion of the instrument display device according to claim 3 is characterized in that a part of the wall portion is arranged on a straight line connecting the second light source and the second design portion.

  That is, in the second design portion, the portion where the light from the second light source reaches in the shortest is transmitted and illuminated with higher brightness than the other portions. Therefore, luminance spots remain around the high luminance portion of the second design portion. So, according to the said structure, it comprises so that a part of the wall part may be arrange | positioned on the straight line which connects a 2nd light source and a 2nd design part so that light may not hit a 2nd design part directly. Therefore, since the arrival of light can be further dispersed, the luminance unevenness of the second design portion can be further suppressed.

  The light guide space of the instrument display device according to claim 4, wherein the second light guide member capable of entering light from the second light source and emitting light toward the second design portion is an instrument dial. The second light guide means is disposed below the first light guide with respect to the back surface side, and the second light guide means reflects the light emitted from the second light guide and the wall portion of the emitted light. The second design portion is transmitted and illuminated by the light to be transmitted.

  According to the said structure, a 2nd light guide is provided below a 1st light guide with respect to the back surface side of an instrument dial between a 2nd light source and a 2nd design part (that is, a 2nd design part of a 2nd design part). By not providing a light guide on the back surface), it is possible to secure a narrow display space between adjacent design parts, while suppressing the luminance unevenness of the second design part, and the light to the wall part Light loss due to repeated reflection can be further reduced. That is, the second design portion can be transmitted and illuminated with higher brightness.

  In the instrument display device according to claim 5, the first design portion and the second design portion display different display contents, respectively, and correspond to the first light source and the second design portion corresponding to the first design portion. The second light source is characterized in that it can be switched on and turned on.

  According to the above configuration, the first and second design parts having different display contents on one instrument are displayed by switching the corresponding light sources, so that one display is displayed on one instrument on the instrument dial. It is necessary to arrange the scales and numbers with a narrower interval than the instrument composed only of the design part having the contents. The present invention can secure a display space between design parts while reducing luminance unevenness in such an instrument display device that is arranged with a narrow interval between the design parts. Further, for example, when the first design part and the other design part must be arranged close to the second design part, the back surface space of the instrument dial can be used efficiently (compact). Therefore, it is particularly effective.

  In the instrument display device according to claim 6, the first design portion includes a plurality of design portions, and the first light source is configured by a number of light sources smaller than the number of the plurality of design portions, and the plurality of designs. A plurality of design parts are each transmitted and illuminated by allowing light from the first light source to enter from an end in a longitudinal direction of the first light guide disposed along the part.

  According to the above configuration, for example, the plurality of design parts of the first design part can be transmitted and illuminated using the first light source including a smaller number of light sources than the number of the design parts, so that the illumination efficiency is good. .

It is a front view of the instrument dial of the display apparatus for instruments in the embodiment of the present invention. In FIG. 1, it is the figure which expanded the part in which the 1st light source and 2nd light source which are arrange | positioned at the back surface of an instrument dial plate exist. It is a perspective view (II) of the instrument dial in the instrument display device of FIG. It is a perspective view (II-II) of the instrument dial in the instrument display device of FIG. It is a block diagram which shows lighting control of each light source of the display apparatus for instruments of FIG. It is a perspective view (II) of the modification of the instrument dial of FIG.

  Hereinafter, the present embodiment when the present invention is applied to a display device for an instrument that switches and displays a power meter indicating the output power of an engine in a hybrid vehicle and a tachometer indicating the engine speed in one instrument is shown in FIGS. This will be described with reference to FIG.

  Note that, in the instrument display device as described above, for the basic configuration of the hybrid vehicle and the control method related to the tachometer / power meter switching display, for example, a well-known technique described in Japanese Patent Application Laid-Open No. 2006-220482 is used. Since it is used, detailed description is omitted here.

  Further, the instrument display device 1 according to the present embodiment (the device configuration will be described later with reference to FIG. 5) is disposed in an instrument panel (not shown) in front of the driver's seat.

  FIG. 1 is a front view of the instrument dial plate 10 in the instrument display device 1 of the present embodiment (viewed from the viewing surface).

  An instrument dial plate 10 shown in FIG. 1 is formed of a well-known printed display board, and includes first design portions 11a to 11m, second design portions 12a to 12e, and third design portions according to a turning trajectory centered on the pointer 2. 13a to 13g are arranged in a ring shape. A fourth design portion 14 and a fifth design portion 15 are formed near the pointer 2 on the instrument dial plate 10. The first design portion to the fifth design portion are printed and formed with light-colored light-colored ink, and the ground portion 16 is printed and formed with light-shielding dark-colored ink.

  The tachometer indicating the engine speed is displayed using the first design portions 11a to 11m, the third design portions 13a to 13g, and the fifth design portion 15. As specific display contents, the first design portions 11a to 11m represent scales, the third design portions 13a to 13g represent numbers (0 to 6), and the fifth design portion 15 represents numbers of the third design portion 13. Represents the unit.

  The power meter indicating the output power of the engine is displayed using the second design parts 12a to 12e and the fourth design part 14. As specific display contents, the second design parts 12a to 12e represent scales, and the fourth design part 14 represents a unit of scales during power meter display.

  The pointer 2 is made of a light-transmitting resin (for example, acrylic, polycarbonate, etc.) and is not shown in the figure, but is connected to the tip of the drive shaft of the stepping motor so as to be substantially parallel to the viewing surface of the instrument dial plate 10. It is configured to be rotationally driven on a smooth surface. Although not shown, the pointer 2 is illuminated by lighting of a light emitting diode (hereinafter referred to as LED) serving as a dedicated light source.

  In addition, about the 3rd design part 13-the 5th design part 15 described in FIG. 1 of this embodiment, since there is no direct relationship with this invention, detailed description is abbreviate | omitted hereafter, but the 3rd design part The parts 13a to 13g have the same configuration as the first design part, and transmit and illuminate the light of the LED light source (23 in FIG. 5 described later) from the side of the light guide (not shown). Moreover, the 4th design part 14 and the 5th design part 15 are the light sources of LED which make the 4th design part 14 and the 5th design part 15 permeate | transmit illumination under the dial 10 as described in patent document 1. (24 and 25 in FIG. 5 to be described later) are arranged opposite to each other, and a light guide (not shown) interposed between the opposed arrangements is provided.

  FIG. 2 shows a partially enlarged view of FIG. In FIG. 2, the scale (solid line) of the first design portions 11 a to 11 e and the scale (solid line) of the second design portions 12 a and 12 b are formed on the instrument dial 10. The numbers of the third design portions 13 a to 13 c are formed on the instrument dial plate 10.

  Further, a first light source 21 (dotted line) and second light sources 22a and 22b (dotted line) are arranged on the back side of the instrument dial plate 10. Moreover, the 1st light guide 31 (dotted line) for guiding the light of this 1st light source 21 to the 1st design parts 11a-11e is arrange | positioned at the back surface side of the instrument dial plate 10, 2nd light source 22a, Wall portions 42 and 43 (dotted lines) for blocking light guide from 22b to other than the second design portions 12a and 12b are configured.

  Hereinafter, each of the light sources, light guides, wall materials and characteristics described above will be briefly described.

  The first light source 21 and the second light sources 22a and 22b are each configured by using an LED as a light source. The walls 42 and 43 are made of a white synthetic resin material having light reflectivity (that is, capable of reflecting light).

  The 1st light guide 31 is formed in plate shape with transparent resin materials, such as an acryl and a polycarbonate, and the 1st design parts 11a-11e by the light reflection in the 1st light guide 31 of the light of the 1st light source 21 are formed. By guiding the light to the light, it is possible to transmit and illuminate without any unevenness in brightness.

  Further, the first light guide 31 is disposed on the back surface of the first design portions 11 a to 11 e of the instrument dial plate 10 and substantially parallel to the instrument dial plate 10. That is, the 1st light guide 31 is arrange | positioned along each scale of 1st design part 11a-11e.

  Here, the principle of the light guide of the first light guide 31 will be described in more detail. The light incident on the first light guide 31 repeats surface reflection and spreads inside the light guide. And the reflective dot (not shown) which scatters light is provided in the opposite side to the surface (outgoing surface) which emits light, and the light scattered in the reflective dot part is outside (design part) from the light exit surface of the light guide To the side). In the first light guide, the area of the reflective dots in the vicinity of the first light source 21 is reduced, and the area of the reflective dots is increased toward the far side from the first light source 21, thereby making the entire first light guide 21 uniform. It is configured to shine.

  Next, the point of the present invention will be described below with reference to FIGS. In order to make the present invention simpler and easier to understand, the following will be focused on a part of the configuration of FIG. 2 (specifically, the first design portions 11a and 11b, the second design portion 12a, and the second light source 22a). explain.

  3 will be described with reference to a perspective view of a section II of the instrument dial plate 10 of FIG. 2, and FIG. 4 will be described with reference to a perspective view of a section II-II of the instrument dial plate 10 of FIG.

  First, the structure of FIG. 3 will be described. The first light guide 31 is arranged in the scale area on the back surface of the first design portion 11 b of the dial for instrument 10. Although not shown in FIG. 3, the light guided inside the first light guide 31 by the incidence of light from the first light source 21 transmits and illuminates the first design portion 11 b.

  The second light source 22a is disposed below the first design portion 11b of the instrument dial plate 10 so as to face the circuit board 51 through a wall portion 42 that blocks light from the first light source 21.

  The circuit board 51 is a well-known printed circuit board made of an epoxy resin or the like, on which various electronic components (for example, a capacitor, a resistor, a transistor, an IC, etc.) are mounted. The circuit board 51 is also wired so that power can be supplied to the light sources (not shown) of the pointer 2 in FIG. 1 and the respective light sources for illuminating the design portions of the instrument dial plate 10. . Further, the circuit board 51 is also equipped with a control means 3 (described later in FIG. 5) for driving each light source (LED) for transmitting and illuminating each design portion.

  Next, a method for arranging the second light source 22a will be described. The second light source 22a is based on the first design portion 11b side (in other words, the first design portion 11b side) on the basis of a vertical line (long broken line) extending vertically from the center of the width of the second design portion 12a of the instrument dial plate 10 to the back surface side. It is disposed at a position displaced (moved in the direction of the arrow from the vertical line to 22a) below (one light guide 31 side).

  Basically, with regard to the arrangement of the second light source 22a, the emitted light does not directly hit the second design portion 12a, and the emitted light reflects in the light guide space formed by being surrounded by the wall portions 42 and 43. Thus, the second design portion 12a may be provided at a position where it can be transmitted and illuminated. However, in consideration of attenuation of light amount due to repeated wall reflection of light and effective use (compacting) of the light guide space below the first design portion 11b (or the first light guide 31), the second design portion. It is preferable that the first design portion 11b (or the first light guide 31) as close as possible to 12a is disposed immediately below and in the vicinity thereof.

  Therefore, even if the third design portions 13a and 13b as shown in FIG. 2 are provided adjacent (≈close) to the second design portion 12a, the arrangement space of the second light source 22a is made compact and efficiently secured. Therefore, it is possible to secure the space between the adjacent designs so as to be a narrow space and display it.

  In addition, the light emitted from the second light source 22a is reflected on the light guide space formed by being surrounded by the wall portions 42 and 43 that block the light guide to other than the second design portion 12a, thereby causing the second design portion 12a to be reflected. Transmitted illumination is performed (indirectly without direct light from the light source) (corresponding to the second light guide means of the present invention).

  The reason for reflecting this light on the walls 42 and 43 is, for example, if the light from the second light source 22a is arranged so that it directly (≈linearly) strikes the second design part 12a. Among them, the portion where the light reaches from the second light source 22a in the shortest is transmitted and illuminated with the highest luminance. For this reason, luminance spots occur around the high luminance portion. In particular, when the design portion has a size that is larger in at least one of the vertical and horizontal directions than the size of the light emitting portion of the light source (for example, in the case of a rectangular shape such as 12a), the luminance unevenness becomes significant.

  Therefore, in the present embodiment, the second light source 22a is located at the position where the first design portion exists (in other words, the side where the first light guide exists) so that the light of the light source does not directly hit the second design portion 12a. The second design portion 12a is indirectly transmitted and illuminated by reflecting light to the wall portions 42 and 43 (that is, the uneven luminance distribution that transmits and illuminates the second design portion 12a is applied to the wall portion. By making it uniform using the reflection of light), it is possible to suppress luminance unevenness while making it unnecessary to dispose a conventional light guide just below the second design portion 12a.

  With such a configuration, it is possible to secure a narrower display space while suppressing luminance unevenness between the first design portion and the second design portion that are adjacent (nearly close) on the dial 10 for the instrument. it can.

  Further, the wall portions 42 and 43 are part of the wall portion (in this case, the light source 22a and the second design portion 12a so as to block the light of the second light source 22a from the second design portion 12a on the straight line connecting the second light source 22a and the second design portion 12a). (Called an eaves portion 42a).

  The reason why the flange 42a is provided will be described below. Even if the light from the second light source 22a is reflected by the wall portions 42 and 43 and the luminance unevenness can be suppressed to some extent, the second light source 22a and the second design portion 12a in the second design portion 12a. The portion that reaches the shortest on the straight line to be connected is transmitted and illuminated with a slightly high luminance by reflection of light (that is, a luminance spot is generated around the slightly high luminance portion of the second design portion 12a). Therefore, since the arrival of light to the second design portion 12 can be more evenly distributed by providing the collar portion 42a so that the second design portion 12a is not directly exposed to light, the brightness of the second design portion 12a Spots can be further suppressed.

  Further, for example, when the second light source 22a cannot be completely displaced from the second design portion 12a to the back side of the first design portion 11b (or the first light guide 31) due to design reasons, for example, In the case where light emitted from the second light source 22a is disposed at a position that directly hits the second design portion 12a, the second design portion 12 can be made without any brightness unevenness by preventing direct light from being hit by some auxiliary means. It is necessary to make it transmit illumination.

  Even in such a case, in the present embodiment, the luminance can be dispersed by providing the flange 42a (because light can be transmitted and illuminated indirectly). With such a configuration, it is possible to further suppress luminance unevenness in the second design portion 12a.

  Further, the wall portion 42 is formed to be inclined with respect to the instrument dial plate 10 from the second light source 22a side toward the second design portion 12a side. Since the wall portion 42 is formed so as to be inclined in this manner, the light of the second light source 22a can be smoothly reflected toward the second design portion 12a side and efficiently condensed, so that the second design portion 12a. Can be transmitted efficiently (that is, brightness illumination can be further increased).

  As shown in FIG. 4, the first light source 21 is disposed on a circuit board 52 provided outside the instrument dial 10. In addition, the first light source 21 has a light-blocking resin partition member 60 on the instrument dial plate 10 side so that light emitted from the first light source 21 does not leak on the viewing surface of the instrument dial plate 10. Has been placed. The circuit board 52 is made of the same material as the circuit board 51 and is electrically connected to the circuit board 51 via a conductive cable. The circuit board 52 is driven to turn on the first light source 21 by being supplied with power from the circuit board 51.

  Then, light enters the longitudinal end portion (light receiving surface) of the first light guide 31 from the first light source 21 formed of one light source (LED) arranged outside the instrument dial 10. The incident light is guided through the first light guide 31 in the direction along the first design portions 11a and 11b, and the guided light is scattered and emitted from the light exit surface, thereby being substantially uniform. Each of the first design portions 11 is transmitted and illuminated (corresponding to the first light guide means of the present invention).

  Since such a single light source (that is, the first light source 21) can transmit and illuminate a plurality of scales such as the first design portions 11a and 11b of the dial 10 for the instrument, it can be illuminated more efficiently than the conventional configuration. .

  As described above, the point portion of the invention has been described with reference to FIGS. 3 and 4, and the configuration of the present embodiment such as the design portion, the light source, and the wall portion corresponding to the point portion of the invention is an instrument display. The same applies to the entire apparatus 1.

  Next, the lighting control of each light source in the instrument display device 1 of the present embodiment will be described using the block diagram shown in FIG.

  The control means 3 shown in FIG. 5 controls the lighting state of each light source (LED) such as a tachometer light source 71, a power meter light source 72, and a pointer light source (not shown).

  Although not shown, the control means 3 is composed of a known CPU, ROM, RAM, microcomputer having an I / O interface and a communication protocol. The control means 3 receives a signal from the power supply detection circuit 5 that detects the ON / OFF state of the ignition switch 4 that is a power switch, and supplies the power from the in-vehicle battery 6 to each corresponding light source to emit light. It has become.

  Further, although not shown, the control means 3 determines whether or not the shift position (SP) of the shift lever is set to the sequential shift range (S range) as described in Japanese Patent Laid-Open No. 2006-220482 described above. 1 is controlled so as to turn on one of the tachometer light source 71 and the power meter light source 72, that is, the first design portions 11a to 11m (and the third design) of the instrument dial plate 10 shown in FIG. Control is performed so that any one of the parts 13a to 13g and the fifth design part 15) and the second design parts 12a to 12e (and the fourth design part 14) is transmitted and illuminated.

  When it is determined that the S range is set by this lighting control, the tachometer including the first design portion 11 is displayed by turning on the tachometer light source 71 so that the effect of the engine speed can be visually recognized. , You can taste the shift feeling with your eyes. On the other hand, when it is determined that it is not set to the S range, the power meter including the second designs 12a to 12e is displayed by turning on the power meter light source 72, so that the engine is operated at the optimum operating point. be able to.

  Thus, when different display contents (in this case, tachometer and power meter) are displayed on one instrument, the light sources respectively corresponding to the first design parts 11a to 11m and the second design parts 12a to 12e are switched and displayed. On the dial 10, it is necessary to arrange the scales and numbers with a narrower interval than an instrument constituted only by a design portion having one display content per instrument. In the present embodiment, the display space between the design portions can be ensured narrow, and the luminance unevenness can be reduced. Therefore, the present invention can be used particularly effectively in an instrument display device that switches and displays such display contents.

  In the above-mentioned Japanese Patent Application Laid-Open No. 2006-220482, by using a liquid crystal panel as a display device, two display contents are superimposed in the same region by freely switching display contents according to an image. That is, it is not necessary to physically provide a display space between design portions by using a liquid crystal panel. However, the liquid crystal panel has a problem that the response time becomes long at low temperatures, and the display before the image is updated partially remains (that is, it becomes difficult to see the meter display), and the luminance is difficult to see in a dark place. Further, a flat panel display such as a liquid crystal panel has a design-related problem that it is difficult to produce a display in which a meter pointer and a design portion are displayed in a three-dimensional shape.

  In this embodiment, such a problem of the flat panel display does not occur. In the present embodiment, the design dial plate 10 of the instrument display device 1 is adjacent (≈proximity) by a method of switching and displaying two display contents using a light source that transmits and illuminates each design part and each design part. The display space between the design portions to be narrowed is ensured, and the luminance unevenness is reduced.

  The instrument display device of the present invention has been described above using the present embodiment, but the present invention is not limited to the above-described embodiment, and the present invention is an invention according to each claim of the claims. The present invention can be applied without departing from the gist of the invention, and is not limited to the vehicle described in the embodiment, but can be applied to, for example, aviation and ships. In this embodiment, two display contents are switched and displayed on one instrument dial. However, the present invention is not limited to this, and one display content is displayed on one instrument dial. However, the present invention can also be suitably applied to the case where the design portions adjacent to each other such as scales and characters must be arranged narrowly and displayed.

  Further, as shown in FIG. 3 described above, the second light source 22a is disposed opposite to the rear of the first design portion 11b of the instrument dial plate 10 via the wall portion 42. However, the present invention is not limited to this. It is only necessary that the second design portion 12a can be indirectly transmitted through the structure of 42a and reflection of light on the wall portions 42 and 43, for example, the substrate 51 on the vertical line of the second design portion 12a. May be arranged opposite to each other.

  In addition, in this embodiment (for example, FIG. 2), the scale (11a to 11m) is transmitted and illuminated by one light source (LED) of the first light source 21, but the illumination brightness of the first design portions 11a to 11m is set. In order to further increase, for example, although not shown, another LED is arranged outside the instrument dial 10 so that light is incident from the end of the first light guide 31 on the scale 11m side of the first design portion 11. Thus, the light may enter the first light guide 31. That is, the end portions (light receiving surfaces) of the first light guide 31 may be provided on both sides of the scales 11a and 11m, and the light may be incident from the light receiving surfaces to increase the illumination luminance.

  Furthermore, the light from the first light source 21 does not necessarily enter from the side surface with respect to the light exit surface of the first light guide 31, and after entering from the end portion, the first light guide 21 passes through the first light guide 21. What is necessary is just to be comprised so that it may guide in the direction in alignment with a design part. For example, the end portion (side surface) is bent by 90 ° against the surface of the instrument dial plate 10, and light may be incident from the bent end portion (lower surface).

  In the present embodiment, the light of the second light sources 22a to 22e is reflected on the walls 42 and 43, so that the second design portions 12a to 12e are transmitted and illuminated. However, the present invention is not limited to this. As a modification, a configuration as shown in a perspective view of a cross section II of the instrument dial plate 10 of FIG. 3 as shown in FIG. 6 may be used.

  In FIG. 6, the 2nd light guide 32a which permeate | transmits and illuminates the 2nd design part 12a is provided in the middle of the 2nd light source 22a and the 2nd design part 12a by guiding the light of the 2nd light source 22a.

  The second light source 22a is configured to reflect the emitted light to the wall portions 42 and 43 to transmit and illuminate the second design portion 12a. However, repeated light reflection on the wall portion causes attenuation of the light amount. As shown in FIG. 1 or FIG. 2, a design portion having a size that is larger in at least one of the vertical and horizontal directions than the size of the light emitting portion of the light source (in this case, a rectangular shape such as the second design portion 12a). ) May have a noticeable decrease in brightness.

  Therefore, the 2nd light guide 32a is not adjacent to the 1st light guide 31 with respect to the whole 2nd design part 12a and the instrument dial 10 from the upper part of the 2nd light source 22a like FIG. (In other words, the second light guide 32a is disposed between the first light guide 31 and the second light source 22a on the back surface side of the dial 10 for instrumentation, and emits light. The surface is arranged facing the second design portion 12a). With this configuration, attenuation of the light amount can be suppressed, that is, luminance illumination can be enhanced.

  Note that FIG. 6 is different from FIG. 3 in that the basic structure and materials are the same as those described in FIG. 3 except that the second light guide 32a is provided and the wall 42 is inclined and the flange 42a is excluded. Therefore, detailed description other than the second light guide 32a is omitted here.

  The second light guide 32a is made of a transparent synthetic resin (acrylic resin or the like), and is supported by the second design portion 12a and the circuit board 51 or the like. The light output surface to the second design portion 12a of the second light guide 32a is formed to be slightly larger than the size of the second design portion 12a, and the light receiving surface of the second light source 22a is also the second light source 22a. It is formed so as to be substantially the same or slightly larger.

  As described above, in the configuration of FIG. 6, the light incident from the light receiving surface of the second light guide 32 a from the second light source 22 a is guided through the inside and emitted from the light output surface, and the wall portion 42, The brightness is uniformed by partially reflecting the light on the light 43 (the light guide itself can also improve the brightness unevenness to some extent, but this structure also makes the brightness non-uniform due to thickness variations during the manufacture of the light guide. 3), it is possible to equalize the luminance spots while transmitting and illuminating the second design portion 12a with higher luminance than the configuration of FIG. In particular, when the light-emitting surface of the second light guide 32a is configured to be smaller (or substantially the same size) than the size of the second design portion 12a for the sake of design, the end of the design portion becomes dark. It is important to suppress luminance unevenness by reflecting part of the light to the portions 42 and 43.

  Therefore, by providing the second light guide 32a as shown in FIG. 6, the display space between the first design portion 11b and the second design portion 12a can be narrowed, and reflected and diffused in the light guide can be reduced. The light condensing effect can be enhanced while suppressing luminance unevenness rather than simply reflecting the light on the third wall portions 42 and 43.

  Although not shown, second light guides 32b to 32e (not shown) corresponding to the second light sources 22b to 22e are also arranged and configured in the same manner as the second light guide 32a described above.

  Moreover, in order to make the description of the instrument display device 1 easier to understand in FIGS. 1 to 6, the design portion and a part of the light source have been described. However, the configuration of the embodiment is not limited to the described portion. The same applies to the entire display device 1 for the instrument such as the entire corresponding design portion and the corresponding light source.

DESCRIPTION OF SYMBOLS 1 Display device 2 Instrument 3 Control means 4 Ignition switch 5 Power supply detection circuit 6 Vehicle-mounted battery 10 Instrument dial 11a-11m 1st design part 12a-12e 2nd design part 13a-13g 3rd design part 14 4th design Part 15 Fifth design part 16 Ground part 21 First light source 22a-22e Second light source 31 First light guide 32a-32b Second light guide 42, 43 Wall part 51 First circuit board 52 Second circuit board 60 Partition 71 Light source for tachometer 72 Light source for power meter

Claims (6)

An instrument dial having a first design part having optical transparency and a second design part adjacent to the first design part, and provided on the back side of the viewing surface of the instrument dial, and the first design An instrument display device comprising: a first light source that transmits and illuminates a part; and a second light source that transmits and illuminates the second design part,
A first light guide disposed on the back of the first design portion of the instrument dial and along the instrument dial, and incident from a longitudinal end of the first light guide First light guiding means for transmitting and illuminating the first design part through guiding and scattering the light of the first light source in a direction along the instrument dial;
The second light source is disposed to be displaced from the second design portion to the first design portion, and guides light from the second light source from a direction different from light guide in a direction along the instrument dial. And second light guide means for transmitting and illuminating the second design part, respectively, on the back side of the viewing surface of the instrument dial,
The second light guide means includes
An instrument display characterized in that it is formed as a light guide space surrounded by a wall part capable of reflecting light, and the second design part is transmitted and illuminated by reflecting the light of the second light source by the wall part. apparatus.   The said wall part which reflects the light of a said 2nd light source is inclined and formed with respect to the said dial plate so that it may guide from the said 2nd light source to the said 2nd design part. Item 3. The instrument display device according to Item 1.   The said wall part is comprised so that a part of said wall part may be arrange | positioned on the straight line which connects the said 2nd light source and the said 2nd design part, The Claim 1 or 2 characterized by the above-mentioned. Instrument display.   A second light guide capable of entering light from the second light source into the light guide space and emitting light toward the second design portion is formed on the back side of the instrument dial. It is arrange | positioned between the 1st light guide and the said 2nd light source, The said 2nd light guide means is light in the said 2nd light guide, and the wall part among the said emitted light The instrument display device according to any one of claims 1 to 3, wherein the second design portion is transmitted and illuminated by the reflected light.   The first design portion and the second design portion display different display contents, and the first light source corresponding to the first design portion and the second light source corresponding to the second design portion are The instrument display device according to any one of claims 1 to 4, wherein the instrument display device is configured to be able to be switched on and turned on.   The first design part is composed of a plurality of design parts, and the first light source is composed of a smaller number of light sources than the number of the plurality of design parts, and is arranged along the plurality of design parts. 6. The transmissive illumination of each of the plurality of design portions is performed by causing light of the first light source to enter from an end portion in a longitudinal direction of the first light guide body. 6. The instrument display device described in 1.

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