JP2019045209A - Display device - Google Patents

Abstract

To provide a display device having good outward appearance even having structure in which a light guiding unit covers a portion of a display unit.SOLUTION: The display device comprises: a display unit 20 displaying an image forward; a design plate 30; a circuit board 40 on which a light source L2 for the design plate is packaged; a tabular second light guide unit 62 which guides, via a first light guide unit 61, light emitted by the light source L2 for the design plate and has a cover unit 621 covering a portion of the display unit 20 from before; and a first housing unit 51 housing the first light guide unit 61. The design plate 30 includes a window unit 31 allowing an image of the display unit 20 to be visually recognizable and a light-emitting unit emitting light using the light guided by the second light guide unit 62. The first light guide unit 61 and the second light guide unit 62 are separate entities, the first light guide unit 61 being fixed to the first housing unit 51, the second light guide unit 62 being fixed to the rear surface of the design plate 30.SELECTED DRAWING: Figure 7

Description

  The present invention relates to a display device.

  As a conventional display device, for example, Patent Literature 1 discloses a vehicle display device including a display unit configured by a liquid crystal panel and a pointer-type instrument.

  In the display device disclosed in Patent Document 1, a light guide plate is provided on the back side of a design plate (display plate) of a pointer-type instrument, and the light guide plate guides light from a light source to thereby provide a design plate. The part is made to emit light. In addition, the light guide plate is provided so as to cover a part of the display unit from the front (see FIG. 2 of the same document).

JP 2017-3517 A

  In the structure disclosed in Patent Document 1, since the display unit is lowered backward by at least the thickness of the light guide plate, a step is generated between the design plate and the display unit, and the appearance may not be good. Although the thinner the light guide portion located on the back side of the design plate, the smaller the step, the illumination structure for illuminating an object (for example, a pointer) different from the design plate In view of the internal structure such as an arrangement structure of components positioned between the design board and the circuit board on which the light source is mounted, it is not easy to realize this. In fact, Patent Document 1 does not show any device for thinning the light guide plate in consideration of the internal structure, but only schematically shows the light guide plate.

  The present invention has been made in view of the above circumstances, and an object thereof is to provide a display device having a good appearance even in a structure in which a part of the display unit is covered with a light guide unit.

In order to achieve the above object, a display device according to the present invention includes:
A display unit for displaying an image forward;
A design plate located in front of the display unit;
A circuit board on which the light source is mounted, facing the design plate across the display unit,
A first light guide part having an emission part for emitting light received from the light source along a rear surface of the design plate;
A plate-like second light guide part that is located between the display part and the design plate and has a light receiving part that receives light emitted from the emission part;
A housing part that is located between the design plate and the circuit board and houses the first light guide part;
The design plate has a window part that allows the image to be visually recognized, and a light emitting part that emits light by the light received by the light receiving part by the second light guide part,
The first light guide and the second light guide are separate bodies,
The first light guide is fixed to the housing;
The second light guide part has a cover part that covers a part of the display part from the front, and is fixed to the rear surface of the design plate.
It is characterized by that.

  According to the present invention, it is possible to provide a display device having a good appearance even in a structure in which a part of the display unit is covered by the light guide unit.

1 is a front view of a display device according to a first embodiment of the present invention. It is sectional drawing of the display apparatus along the AA line shown in FIG. It is a front view of a display part, a case, and a light guide. It is a principal part front view of a circuit board and a light guide. It is a back perspective view of a light guide. It is a schematic diagram for demonstrating the light guide path which concerns on 1st Embodiment. It is sectional drawing of the display apparatus which concerns on 2nd Embodiment of this invention. It is a schematic diagram for demonstrating the light guide path which concerns on 2nd Embodiment.

  A display device according to an embodiment of the present invention will be described with reference to the drawings.

(First embodiment)
The display device 1 according to the first embodiment of the present invention has a horizontally long and substantially rectangular shape as shown in FIG. 1 and is mounted on a vehicle. The display device 1 notifies the user (mainly the driver) of information inside and outside the vehicle (hereinafter referred to as vehicle information) such as various measurement amounts and warning information. The display device 1 is disposed behind the steering wheel of the vehicle as viewed from the user.

  In the following, in order to facilitate understanding of the configuration, each part will be described with the user side as “front” and the opposite side as “rear” with respect to the display device 1.

As shown in FIGS. 1 to 6, the display device 1 includes a pointer-type instrument 10, a display unit 20, a design board 30, a circuit board 40, a case 50, a light guide 60, and a light shielding unit 70. The front cover 80 and a rear cover (not shown) are provided.
The front cover 80 and the rear cover are fitted into a box shape, and the other parts are accommodated therein. The front cover 80 includes a translucent plate that allows the display content of the display device 1 to be viewed through and a turn-back member that holds the translucent plate.

  The pointer-type meter 10 includes a pointer 11 that rotates about an axis AX illustrated in FIG. 2 and an indicator portion 12 that is formed according to the rotation range of the pointer 11. The indicator 12 is formed on the design plate 30 as will be described later. The pointer-type meter 10 notifies the measurement amount by causing the pointer 11 and the indicator unit 12 to be read in comparison. The pointer-type meter 10 is configured as a speedometer that notifies the vehicle speed, for example.

  The pointer 11 includes an instruction portion made of a light guide material that instructs the indicator portion 12 and a light-shielding cap provided at the rotation center portion of the pointer 11. The indicating portion of the pointer 11 can emit light by light from a pointer light source L1 described later.

  The display unit 20 is provided on the left side of the pointer-type meter 10 in FIG. 1 and notifies vehicle information with an image. The display unit 20 displays an image on the front display surface 21 and includes a liquid crystal display (LCD (Liquid Crystal Display)), an organic EL (Electro Luminescence), and the like.

  The design board 30 is formed by forming a printing layer on at least one of the front and rear surfaces of a translucent plate made of polycarbonate, for example, and is positioned in front of the display unit 20 as shown in FIG. The design plate 30 is formed with a light-shielding print layer over a wide range of plate materials.

  As illustrated in FIGS. 1 and 2, the design plate 30 includes a window portion 31, a light emitting portion 32, a through hole 33, a first lighting portion Wa, and a second lighting portion Wb. In this embodiment, the indicator unit 12 is included in the light emitting unit 32.

  The window part 31 makes the display image of the display part 20 visible. The window part 31 is formed by a part of the design plate 30 that is not provided with the light-shielding print layer and has translucency. In addition, you may give a translucent printing layer to the window part 31. FIG. Thus, by forming the window part 31 covering the front of the display part 20 on the design plate 30 having the indicator part 12, a sense of unity (seamless feeling) of the display of the display part 20 and the pointer type instrument 10 is produced. Can do. The window 31 may be formed on the design plate 30 as an opening that exposes the display surface 21 of the display unit 20.

  The light emitting portion 32 emits light based on light emitted from a design plate light source L2 described later, and is formed by a portion of the design plate 30 where the light-shielding print layer is not applied, and has translucency. In this embodiment, the indicator portion 12 is formed as the light emitting portion 32. As shown in FIG. 1, the indicator unit 12 includes numerical values and scales formed in an arc shape over the rotation range of the pointer 11 and characters (“km / h” indicating a unit of speed in FIG. 1). ing. In the design plate 30, the light-shielding print layer is not formed on the portion corresponding to the indicator portion 12 (that is, the indicator portion 12 is formed in a so-called blank character shape). Function. Note that not all of the indicator unit 12 may be configured as the light emitting unit 32. How the index unit 12 is configured is arbitrary depending on the required function and design.

  The through hole 33 is formed in a substantially circular shape with the axis AX as a center. With this through hole 33, a pointer 11 attached to a rotation shaft 41 a described later can be rotated in front of the design plate 30.

The 1st lighting part Wa and the 2nd lighting part Wb perform various alerting | reporting by lighting, are formed by the part in which the light-shielding printing layer is not given in the design board 30, and have translucency.
As shown in FIG. 1, the first lighting portion Wa is provided inside the indicator portion 12 and in the vicinity of the rotation center of the pointer 11. In the illustrated example, the first lighting unit Wa is provided as a fueling lamp. The 1st lighting part Wa lights according to light emission of the light source (not shown) for the 1st lighting part located in the back.
The 2nd lighting part Wb is provided above the display part 20, as shown in FIG. In the example of illustration, the 2nd lighting part Wb is provided as a pair of direction indicator lamp. The 2nd lighting part Wb lights up according to light emission of the light source (not shown) for the 2nd lighting part located in the back.

  The circuit board 40 is composed of a printed circuit board on which various circuits are formed. As shown in FIG. 2, the circuit board 40 is arranged to face the design board 30 with the display unit 20 interposed therebetween. The overall operation of the display device 1 is controlled by a control unit (not shown) mounted on the circuit board 40 or electrically connected to the circuit board 40. A control part controls operation | movement of the pointer type | mold meter 10 and the display part 20 according to the vehicle information acquired from ECU (Electronic Control Unit) of a vehicle, for example. Further, the control unit performs light emission control of the light source described later.

  A motor 41 for rotating the pointer 11 is mounted on the rear surface of the circuit board 40. The motor 41 is composed of, for example, a stepping motor. The rotation shaft 41 a of the motor 41 protrudes forward of the circuit board 40 through the base material of the circuit board 40. Since the pointer 11 is attached to the distal end portion of the rotating shaft 41a, the pointer 11 rotates about the axis AX as the motor 41 operates.

  On the front surface of the circuit board 40, the pointer light source L1 and the design plate light source L2 shown in FIGS. 2 and 4 and the first and second light sources for the lighting unit (not shown) are mounted. These light sources are composed of, for example, LEDs (Light Emitting Diodes) that emit light toward the front.

  There are a plurality of pointer light sources L1, which are arranged around the rotation shaft 41a of the motor 41 as shown in FIGS.

  There are a plurality of light sources L2 for design plates, and they are arranged along the rear surface of a first light guide 61 (described later) in the light guide 60 as shown in FIGS. Moreover, as shown in FIG. 4, the design board light source L2 includes a first specific light source L2a and a second specific light source L2b. The arrangement of the design plate light source L2 will be described in detail later.

  The case 50 is made of, for example, polypropylene, and holds the light guide body 60 and the design plate 30 in the front, and holds the circuit board 40 in the rear. The case 50 is fitted into a box-shaped rear cover (not shown) that opens to the front, and houses various components together with the rear cover.

  As shown mainly in FIG. 3, the case 50 includes a first housing portion 51, a second housing portion 52, a pointer illumination chamber 53, a first lighting portion illumination chamber 54 a, and a second lighting portion illumination. And a chamber 54b. These are each formed in an independent room shape.

  As shown in FIG. 2, the first accommodating part 51 accommodates the first light guiding part 61 of the light guide 60, and as shown in FIG. 3, in plan view according to the shape of the first light guiding part 61. It is formed in a substantially D shape consisting of a linear shape and an arc shape. The design board light source L2 is located on the front surface of the circuit board 40 in the first housing portion 51.

  As shown in FIG. 2, the second storage unit 52 stores the display unit 20 and is positioned on the outer peripheral side of the first storage unit 51. A partition wall 55 is formed between the first housing part 51 and the second housing part 52 in the case 50 so as to separate them.

  As shown in FIG. 2, the partition wall 55 is formed so as to stand along a first direction D1 (front-rear direction) in which the base material surface of the circuit board 40 faces. As shown in FIG. 3, the partition wall portion 55 extends along a second direction D <b> 2 (vertical direction in FIG. 3) along the right side edge of the display unit 20.

  The pointer illumination chamber 53 is formed in a cylindrical shape surrounding the rotation shaft 41a, and guides the light emitted from the pointer light source L1 to the pointer 11.

  The first lighting section illumination chamber 54a is formed between the first housing section 51 and the pointer lighting chamber 53, and the first lighting is formed on the design plate 30 with the light emitted from the first lighting section light source. Guide to part Wa. A plurality of first lighting section illumination chambers 54a are provided along the circumferential direction of the rotating shaft 41a, one of which corresponds to the fueling lamp shown in FIG. Although not shown, a warning lamp corresponding to the other lighting chamber 54a for the first lighting unit may be provided as the first lighting unit Wa. In this embodiment, as shown in FIG. 3, a portion where the pointer illumination chamber 53 and the right side surface of the display unit 20 face each other in the left-right direction in the drawing (the second storage portion 52 and the pointer illumination chamber 53). The first lighting section illumination chamber 54a is not formed in the portion between the two.

  As shown in FIG. 3, the second lighting part illumination chamber 54 b is formed on the upper part of the second housing part 52, and the second lighting is formed on the design plate 30 with the light emitted from the second lighting part light source. Guide to part Wb. A plurality of second lighting section illumination chambers 54b are provided along the left-right direction in FIG. 3 (the direction orthogonal to the second direction D2), and those located at both ends are a pair of direction indicating lamps shown in FIG. It corresponds to. Although not shown, a warning lamp corresponding to another second lighting part illumination chamber 54b may be provided as the second lighting part Wb.

  The light guide 60 is for guiding the light emitted from the design plate light source L2 to illuminate the design plate 30 from behind, and includes a first light guide 61 and a second light guide 62. . The light guide 60 is formed of a light-transmitting resin such as acrylic resin, and the second light guide 62 is located on the front surface of the case 50.

As shown in FIG. 2, the first light guide 61 is housed in the first housing 51 of the case 50 and is positioned between the design plate light source L <b> 2 and the design plate 30.
As shown in FIG. 5, the first light guide portion 61 includes an extending portion 611 extending in the second direction D2 and a curved portion 612 along the circumferential direction around the axis AX. It is formed in a cylindrical shape that is substantially D-shaped.

  As shown in FIG. 2, the extending portion 611 faces the display unit 20 with the partition wall 55 interposed therebetween, and the light received from the design light source L <b> 2 is directed toward the display unit 20 along the rear surface of the design plate 30. And a first reflecting surface 611a to be reflected.

  As shown in FIG. 2, the bending portion 612 is located on the outer peripheral side of the rotation shaft 41a with respect to the first lighting portion illumination chamber 54a, and receives the light received from the design light source L2 along the rear surface of the design plate 30. It has the 2nd reflective surface 612a reflected in the outer peripheral direction of the rotating shaft 41a not on the display part 20 side.

  Here, as shown in FIG. 4, the plurality of design plate light sources L <b> 2 mounted on the circuit board 40 are arranged along the rear surface of the first light guide 61. The plurality of design plate light sources L2 include a first specific light source L2a located at one end portion in the second direction D2 of the extending portion 611 and a second specific light source L2b located at the other end portion. That is, the 1st specific light source L2a and the 2nd specific light source L2b are located in the angle | corner where the extension part 611 and the curved part 612 cross. By providing the first specific light source L2a and the second specific light source L2b in this way, the portion of the design plate 30 corresponding to the radial direction centering on the axis AX of the corner is also uniformly illuminated by the light guide 60. Can do.

As shown in FIG. 2, the second light guide unit 62 is located between the display unit 20 or the case 50 and the design plate 30, and guides the light reflected by the first reflection surface 611a and the second reflection surface 612a. .
As shown in FIGS. 2 and 5, the second light guide unit 62 is formed in a disk shape centered on the axis AX, and has a cover 621 that covers a part of the display unit 20 from the front.

  The plate thickness of the second light guide part 62 is as thin as several mm (for example, about 1 mm), and is smaller than the thickness of the first light guide part 61. By forming the second light guide portion 62 thin in this way, the step between the design plate 30 and the display portion 20 that may reduce the appearance of the display can be reduced.

  Further, the plate thickness of the second light guide part 62 is smaller than the thickness of the first light guide part 61. In the first embodiment, the first light guide 61 and the second light guide 62 are integrally formed by two-stage injection molding. For example, by forming a thin plate-like second light guide part 62 by injection molding in advance, inserting the second light guide part 62 prepared in this way into a mold, and further performing injection molding (insert molding), The light guide 60 in which the first light guide 61 and the second light guide 62 are integrated is formed.

  Here, when the light guide body 60 having the cylindrical first light guide portion 61 connected to the second light guide portion 62 having a thickness of several millimeters is formed as a single piece, the second light guide portion 62 Due to the thinness of the corresponding mold, there is a high possibility of resin flow failure. However, in this embodiment, the light guide 60 having a characteristic shape can be formed with high accuracy by two-stage injection molding. The light guide 60 may be formed by three or more stages of injection molding.

  As shown in FIG. 2, the light shielding part 70 is provided at the outer peripheral end of the cover part 621. The light-shielding part 70 is made of, for example, a light-shielding film attached to the outer peripheral end surface of the cover part 621, and the light from the design plate light source L2 guided to the cover part 621 of the second light guide part 62 This prevents leakage to the front surface of 20 (the surface of the display surface 21).

  In addition, the light-shielding part 70 may be provided by printing of light-shielding ink, application | coating of a light-shielding coating material, integral molding of the film which printed the light-shielding ink, etc. Moreover, the light shielding part 70 may be realized by a part of the design plate 30 (for example, a part formed by drawing). Further, the light shielding unit 70 may be provided so as to surround not only the cover unit 621 but also the outer peripheral end of the second light guide unit 62. That is, the light shielding unit 70 may be provided at least at the outer peripheral end of the covering unit 621 in the second light guiding unit 62.

  Although not shown, a reflection sheet is provided between the second light guide unit 62 and the display unit 20, and a diffusion sheet is provided between the second light guide unit 62 and the design plate 30. The reflection sheet efficiently reflects the light from the light source L2 for the design plate guided to the second light guide unit 62 toward the design plate 30. The reflection sheet is made of, for example, a white resin sheet, and is attached to the rear surface of the second light guide unit 62. The diffusion sheet is for diffusing light emitted from the front surface of the second light guide unit 62 to reduce uneven illumination of the design plate 30. For example, the diffusion sheet is made of a translucent resin sheet, It is attached to the front surface of the optical unit 62.

  In the display device 1 configured as described above, the light emitted from the light source L2 for the design plate is reflected by the first reflection surface 611a and the second reflection surface 612a of the first light guide portion 61 of the light guide 60, Guided to the second light guide 62 behind the design plate 30, the design plate 30 is illuminated. Thereby, the light emission part 32 of the design board 30 light-emits.

  Here, with reference to FIG. 6, the light guide path | route of the light guide 60 in the display part 20 side is demonstrated concretely.

  The light emitted from the design plate light source L2 enters the rear end face of the first light guide 61 in the light guide 60 and travels forward. The light directed forward is reflected by the first reflecting surface 611a and travels toward the display unit 20 along the rear surface of the design plate 30. The light reflected by the first reflection surface 611a is guided to the second light guide unit 62, and further reflected by the rear surface (and a reflection sheet (not shown)) and emitted to the front of the second light guide unit 62. . The emitted light illuminates the design plate 30 from the rear as diffused light through the diffusion sheet (not shown). Thereby, the light emission part 32 formed in the design board 30 light-emits.

  Further, the light guided to the cover part 621 of the second light guide part 62 reaches the outer peripheral end face (the left end in FIG. 6) of the cover part 621, and the light-shielding part 70 is provided on this outer peripheral end face. Therefore, it does not leak to the front of the display surface 21 of the display unit 20. Thereby, it is prevented that the appearance of the image displayed on the display surface 21 is reduced. This is the end of the description of the first embodiment.

(Second Embodiment)
Next, a display device according to the second embodiment having a light guide 260 in which the first light guide 61 and the second light guide 62 are configured separately will be described. The appearance of the display device and the configuration other than the light guide 260 and hooks 511 and 512 described later are the same as those in the first embodiment. In the following second embodiment, components having the same functions as those of the first embodiment are denoted by the same reference numerals as those of the first embodiment, and differences from the first embodiment will be mainly described.

  As shown in FIGS. 7 and 8, the light guide 260 according to the second embodiment includes a separate first light guide 61 and a second light guide 62. The 1st light guide part 61 and the 2nd light guide part 62 are arrange | positioned at intervals of several mm (for example, 1-2 mm) in the radial direction of the rotating shaft 41a. By providing the spacing as described above, the first light guide 61 and the second light guide 62 can be easily assembled to the case 50.

  As shown in FIG. 7, the first light guide 61 is fixed in the first housing 51 of the case 50. Specifically, the first light guide portion 61 is engaged with hooks 511 and 512 provided in the first housing portion 51. For example, the hooks 511 and 512 are provided so as to protrude from a wall surface (hereinafter referred to as an inner wall surface) near the rotation shaft 41 a in the first housing portion 51 in the outer peripheral direction of the rotation shaft 41 a. The hook 511 engages with an engaging portion 611 b formed on the extending portion 611 of the first light guide portion 61. The hook 512 engages with an engaging portion 612 b formed on the curved portion 612 of the first light guide portion 61.

  In addition, the engagement aspect of the 1st light guide part 61 to the 1st accommodating part 51 is arbitrary, and can be changed suitably. For example, the hooks 511 and 512 that protrude from the outer wall surface on the outer peripheral side of the rotation shaft 41a rather than the inner wall surface of the first housing portion 51 toward the rotation shaft 41a are formed. Engaging portions 611 b and 612 b that engage with 512 may be formed in the first light guide portion 61. Moreover, the fixing method to the 1st accommodating part 51 of the 1st light guide part 61 is not restricted to engagement, You may be based on other well-known fixing methods, such as fitting, screwing, and adhesion | attachment.

  As shown in FIG. 8, the first light guide 61 according to the second embodiment is reflected by the first reflecting surface 611 a and directed to the display unit 20 along the rear surface of the design plate 30. It has the output part 610 which radiate | emits the light from. The second light guide unit 62 includes a light receiving unit 620 that receives light from the design plate light source L <b> 2 emitted from the emission unit 610 of the first light guide unit 61. The emitting unit 610 and the light receiving unit 620 are opposed to each other in the radial direction of the rotating shaft 41a with the above-mentioned interval of several mm.

  The emitting portion 610 of the first light guide portion 61 has a surface facing the outer diameter direction of the rotation shaft 41a, and this surface is mirror-finished. The light receiving portion 620 of the second light guide portion 62 has a surface facing the inner diameter direction of the rotating shaft 41a, and this surface is mirror-finished. In other words, each of the opposing surfaces of the emitting unit 610 and the light receiving unit 620 is mirror-finished. Thus, by making each opposing surface into a mirror surface shape, the fall of the light quantity of the light from the design light source L2 which injects into the light-receiving part 620 from the output part 610 can be suppressed.

  The second light guide 62 according to the second embodiment is fixed to the rear surface of the design plate 30. For example, the second light guide 62 is fixed by glue printing formed on the rear surface of the design plate 30 with the diffusion sheet interposed therebetween. In addition, the fixing method of the 2nd light guide part 62 with respect to the rear surface of the design board 30 is not restricted to glue printing, Other well-known fixing methods, such as a double-sided tape, a gel material, a welding pin, and a hook, may be sufficient.

  In addition, the reflection sheet made of, for example, a white resin sheet described in the first embodiment is fixed to the rear surface of the second light guide unit 62 according to the second embodiment. In the second embodiment, instead of the reflective sheet, a reflective print layer may be directly formed on the rear surface of the second light guide unit 62 by a known printing method such as screen printing.

  In the second embodiment, the light emitted from the design plate light source L2 is reflected by the first reflecting surface 611a and the second reflecting surface 612a of the first light guide 61, and the first light guide 61 and the second light guide. The design plate 30 is illuminated by being guided to the second light guide unit 62 behind the design plate 30 through a gap provided between the unit 62 and the design plate 30. Thereby, the light emission part 32 of the design board 30 light-emits.

  Here, with reference to FIG. 8, the light guide path | route of the light guide 260 in the display part 20 side is demonstrated concretely.

  The light emitted from the design plate light source L2 enters the rear end face of the first light guide 61 and travels forward. The light directed to the front is reflected by the first reflecting surface 611 a and is emitted from the emitting unit 610 toward the display unit 20 along the rear surface of the design plate 30. The light emitted from the light emitting unit 610 passes through a gap provided between the first light guide unit 61 and the second light guide unit 62 and is guided from the light receiving unit 620 into the second light guide unit 62. After that, the light is further reflected by the rear surface (and a reflection sheet (not shown)) and emitted to the front of the second light guide unit 62. The emitted light illuminates the design plate 30 from the rear as diffused light through the diffusion sheet (not shown). Thereby, the light emission part 32 formed in the design board 30 light-emits.

  Further, the light guided to the cover portion 621 of the second light guide portion 62 reaches the outer peripheral end surface (left end in FIG. 8) of the cover portion 621, and this outer peripheral end surface is similar to the first embodiment. Since the light shielding part 70 is provided, it does not leak to the front of the display surface 21 of the display part 20. Thereby, it is prevented that the appearance of the image displayed on the display surface 21 is reduced.

  In addition, this invention is not limited by the above embodiment and drawing. Changes (including deletion of components) can be made as appropriate without departing from the scope of the present invention.

The display device 1 described above has a design including the display unit 20 that displays an image forward, the window unit 31 that makes the image visible, and the light emitting unit 32 that emits light by the light guided by the second light guide unit 62. A board 30, a circuit board 40 on which a design board light source L <b> 2 (an example of a light source) is mounted, a first light guide 61 having a first reflection surface 611 a (an example of a reflection surface), and a part of the display unit 20. And a plate-like second light guide 62 for guiding the light reflected by the first reflecting surface 611a.
Thus, the light from the design light source L1 is guided by the second light guide 62 along the rear surface of the design plate 30 via the first light guide 61 while taking into account the internal structure of the display device 1. Therefore, the design plate 30 can be illuminated well. That is, it is possible to improve the appearance even in a structure in which a part of the display unit 20 is covered by the light guide unit (covering unit 621).

  There are a plurality of design plate light sources L2, and first and second specific light sources L2a and L2b (specific light sources) facing the rear surfaces of both ends in the second direction D2 of the extending portion 611 in the first direction D1. Example). For this reason, portions of the design plate 30 corresponding to both ends of the extending portion 611 can be illuminated uniformly by the light guide 60. The specific light sources (first and second specific light sources L2a and L2b) may be provided at positions facing at least one rear surface of both ends in the second direction D2 of the extending portion 611.

In particular, in the display device 1 according to the second embodiment, the first light guide 61 and the second light guide 62 are separate bodies, and the first light guide 61 includes the first housing 51 (the housing). The second light guide part 62 is fixed to the rear surface of the design plate 30.
Since it did in this way, each assembly | attachment of the 1st light guide part 61 and the 2nd light guide part 62 is easy. In addition, if the 1st light guide part 61 is engaged and fixed to the 1st accommodating part 51, the assembly | attachment of the 1st light guide part 61 will become easier and is preferable.

  Moreover, since the light-shielding part 70 is provided in the outer peripheral end surface of the cover part 621 of the 2nd light guide part 62, the light from the design light source L2 does not leak ahead of the display surface 21 of the display part 20. . Thereby, it is prevented that the appearance of the image displayed on the display surface 21 is reduced.

In particular, in the display device 1 according to the first embodiment, the plate thickness of the second light guide part 62 is smaller than the thickness of the extending part 611 of the first light guide part 61, and the first light guide part 61 and the first light guide part 61 The two light guides 62 are integrally formed by a plurality of stages of injection molding.
Since it did in this way, the 2nd light guide part 62 can be formed in a thin plate shape with a board thickness of about several mm, avoiding a molding defect, and the space | interval of the design board 30 and the display part 20 can be narrowed. it can. As a result, the display appearance can be improved.

  Moreover, since the window part 31 which can visually recognize the image of the display part 20, and the indicator part 12 in which at least a part of the pointer type instrument 10 is formed as the light emitting part 32 are formed on the common design board 30, the display A sense of unity (seamless feeling) of the display of the unit 20 and the pointer-type meter 10 can be produced.

  Note that the vehicle on which the display device 1 is mounted is not limited to a vehicle, and may be an aircraft, a ship, an agricultural machine, or the like. In addition, the display device 1 has a structure in which the design plate 30 is illuminated from behind by the light guides 60 and 260 and a part of the light guides 60 and 260 covers a part of the display unit 20 from the front. If it is a thing, it does not need to be equipped with the pointer type | mold meter 10, and a use and a structure are arbitrary. Moreover, the shape and material of the light guides 60 and 260 are also arbitrary. For example, the portion of the second light guide unit 62 that does not cover the display unit 20 from the front may not be a thin plate.

  In the above description, in order to facilitate understanding of the present invention, descriptions of known technical matters are omitted as appropriate.

DESCRIPTION OF SYMBOLS 1 ... Display apparatus 10 ... Pointer type | mold meter, 11 ... Pointer, 12 ... Indicator | index part, AX ... Axis 20 ... Display part, 21 ... Display surface 30 ... Design board 31 ... Window part, 32 ... Light emission part 33 ... Through-hole, Wa ... 1st lighting part, Wb ... 2nd lighting part 40 ... Circuit board, 41 ... Motor, 41a ... Rotating shaft L1 ... Light source for pointer L2 ... Light source for design board, L2a ... 1st specific light source, L2b ... 2nd specific light source DESCRIPTION OF SYMBOLS 50 ... Case 51 ... 1st accommodating part, 511,512 ... Hook 52 ... 2nd accommodating part, 55 ... Bulkhead part 53 ... Illuminating room for pointers, 54a ... Illuminating room for 1st lighting part, 54b ... For 2nd lighting part Illumination chambers 60, 260 ... Light guide 61 ... First light guide 611 ... Extension part, 611a ... First reflection surface 612 ... Curved part, 612a ... Second reflection surface 611b, 612b ... Engagement part 610 ... Emitting part 62 ... 2nd light guide part 621 ... Cover part 620 ... Light-receiving part 70 ... Light-shielding part 80 ... Front cover D1 ... First direction, D2 ... Second direction

Claims (5)

A display unit for displaying an image forward;
A design plate located in front of the display unit;
A circuit board on which the light source is mounted, facing the design plate across the display unit,
A first light guide part having an emission part for emitting light received from the light source along a rear surface of the design plate;
A plate-like second light guide part that is located between the display part and the design plate and has a light receiving part that receives light emitted from the emission part;
A housing part that is located between the design plate and the circuit board and houses the first light guide part;
The design plate has a window part that allows the image to be visually recognized, and a light emitting part that emits light by the light received by the light receiving part by the second light guide part,
The first light guide and the second light guide are separate bodies,
The first light guide is fixed to the housing;
The second light guide part has a cover part that covers a part of the display part from the front, and is fixed to the rear surface of the design plate.
A display device characterized by that. The first light guide is engaged with the housing;
The display device according to claim 1. A light shielding portion is provided at the outer peripheral end of the covering portion.
The display device according to claim 1 or 2. The emission part of the first light guide part and the light receiving part of the second light guide part are opposed to each other with a space therebetween, and each facing surface is mirror-finished.
The display device according to claim 1, wherein the display device is a display device. While rotating in front of the design plate, comprising a pointer that indicates the indicator portion formed on the design plate,
At least a part of the indicator part is the light emitting part,
The emission part of the first light guide part emits light received from the light source in an outer peripheral direction of a rotation shaft of the pointer,
The display device according to claim 1, wherein the display device is a display device.

Images