JP6919456B2 - Vehicle display device - Google Patents

Description

The present disclosure relates to a vehicle display device mounted on a vehicle.

Conventionally, a vehicle display device mounted on a vehicle is known. The apparatus disclosed in Patent Document 1 includes a light source portion that provides light source light, and a translucent plate that is formed in a translucent plate shape and that introduces light source light into the plate through an incident portion. .. Here, the light-transmitting plate has a reflection display unit that illuminates and displays a pattern formed by appropriately arranging a plurality of reflection elements. Here, the reflecting element has a shape recessed from the plate surface and reflects the light source light introduced into the plate to the visual recognition side.

Japanese Unexamined Patent Publication No. 2016-121890

In the apparatus of Patent Document 1, nothing is provided between the incident portion and the reflection display portion in the light transmitting plate. Therefore, the light source light introduced into the plate from the incident portion directly irradiates each reflecting element of the reflection display portion. Since the positional relationship with respect to the light source unit is different between the reflecting elements, for example, a difference in the amount of incident light of the light source light and a difference in the reflection direction of the light source light may occur between the reflecting elements. Therefore, there is a concern that unintended brightness unevenness may occur in the brilliant pattern and the appearance may be deteriorated.

One object disclosed is to provide a good-looking vehicle display device.

The vehicle display device disclosed herein is a vehicle display device mounted on a vehicle.
A light source unit (50) that provides light source light and
It is provided with a translucent plate (30) which is formed in a translucent plate shape and introduces light source light into the plate through an incident portion (32e).
The translucent plate is
It has a plurality of reflecting elements (35) having a shape recessed from the plate surface (31a, 31b) and provided with a reflecting surface (37) for reflecting the light source light introduced into the plate to the visual recognition side, and the reflecting element is appropriately provided. A reflection display unit (33) that illuminates and displays the design (34) formed by arranging the design (34).
It has groove portions (40, 240, 340, 440) that are arranged between the incident portion and the reflection display portion and extend so as to intersect the traveling direction (PD) of the light source light inside the plate.

According to such disclosure, the groove portion arranged between the incident portion and the reflection display portion extends so as to intersect the traveling direction of the light source light inside the plate. Therefore, at least a part of the light source light provided by the light source unit is introduced into the inside of the plate through the incident portion of the translucent plate, and before reaching the reflection display unit, the groove portion intersecting the traveling direction thereof is formed. It will go through. Therefore, the direct irradiation of the light source light to the reflected display unit is restricted. When passing through the groove, for example, the illumination unevenness of the light source light can be alleviated, and the irradiation state of the light source light to each reflecting element of the reflection display unit can be adjusted. It can be suppressed. Therefore, in the vehicle display device, the appearance of the design of the reflection display unit can be improved.

The reference numerals in parentheses exemplify the correspondence with the parts of the embodiments described later, and are not intended to limit the technical scope.

It is a front view which shows the display device for a vehicle of 1st Embodiment. FIG. 2 is a cross-sectional view taken along the line II-II of FIG. FIG. 3 is a cross-sectional view taken along the line III-III of FIG. It is an enlarged plan view of the area where the composite reflection element of the reflection display part of FIG. 1 is arranged. It is a cross-sectional view taken along the line VV of FIG. FIG. 5 is a sectional view taken along line VI-VI of FIG. It is a figure which enlarges and shows the vicinity of the groove part of the light-transmitting plate of 1st Embodiment. FIG. 7 is a cross-sectional view taken along the line VIII-VIII of FIG. FIG. 8 is a diagram for explaining how the light source light travels. It is the figure which looked at the groove part in the X direction of FIG. It is a figure corresponding to FIG. 8 in the second embodiment. It is a figure corresponding to FIG. 9 in the second embodiment. It is a figure corresponding to FIG. 8 in a third embodiment. It is a figure corresponding to FIG. 10 in a third embodiment. It is an enlarged view which shows the inner wall surface of 3rd Embodiment enlarged. It is a top view which shows the light source part and the light-transmitting plate of 4th Embodiment. 16 is a cross-sectional view taken along the line XVII-XVII of FIG. It is an enlarged view of a part of FIG. 16, and is the figure which shows the simulation result which light-traced the light source light emitted from a light emitting element. It is a figure corresponding to FIG. 7 in the modification 1. It is a figure which shows the positional relationship between a light transmitting plate and a light source part in a modification 12. It is a figure corresponding to FIG. 7 in the modification 13. It is a figure corresponding to FIG. 9 in one example of the modification 13. It is a figure corresponding to FIG. 9 in another example of the modification 13.

Hereinafter, a plurality of embodiments will be described with reference to the drawings. In addition, duplicate description may be omitted by assigning the same reference numerals to the corresponding components in each embodiment. When only a part of the configuration is described in each embodiment, the configuration of the other embodiment described above can be applied to the other parts of the configuration. Further, not only the combination of the configurations specified in the description of each embodiment, but also the configurations of a plurality of embodiments can be partially combined even if the combination is not specified. .. (First Embodiment)
As shown in FIG. 1, the vehicle display device 100 according to the first embodiment of the present disclosure is mounted on a vehicle and installed on an instrument panel facing a seat on which an occupant who visually recognizes the device 100 sits. The vehicle display device 100 can display vehicle information toward the visual side where the occupant is located. In the instrument panel, the upper surface portion is formed in a gently curved surface shape that is convex on the upper side of the vehicle.

In the present embodiment, the lower side of the vehicle means the side where gravity is generated in the vehicle on the horizontal plane. The upper side of the vehicle means the opposite side of the lower side of the vehicle. The left side or the right side of the vehicle indicates the left side or the right side with respect to the occupant seated in the seat.

As shown in FIGS. 2 and 3, such a vehicle display device 100 is composed of a case unit 10, a main body display unit 20, a light transmitting plate 30, a light source unit 50, and the like.

The case portion 10 has a back side case 11, a visible side case 12, a plate window member 13, and a smoke plate 14. The back side case 11 is formed of, for example, a synthetic resin so as to have a light-shielding property, and covers the main body display portion 20 from the back side opposite to the visual recognition side.

The viewing side case 12 arranged on the viewing side of the back side case 11 is formed of, for example, a synthetic resin so as to have a light-shielding property, and forms an outer frame portion 12a that surrounds the main body display portion 20 and the like from the outside. A partition portion 12b for partitioning the case internal space is formed. Further, the viewing side case 12 holds the light transmitting plate 30 and the light source unit 50.

The plate window member 13 is formed of, for example, a synthetic resin so as to have a light-shielding property, and is arranged on the visual side of the main body display unit 20. The plate window member 13 has openings on the viewing side and the back surface side, and is formed in a tubular shape along the outer periphery of the device.

The smoke plate 14 is formed in a curved plate shape that closes the entire surface of the opening on the visible side of the plate window member 13 with a semipermeable resin such as a colored acrylic resin or a polycarbonate resin. As a result, the main body display unit 20 and the translucent plate 30 are visible to the occupant through the smoke plate 14. The smoke plate 14 of the present embodiment has a transmittance set to about 30% due to smoke-like coloring, but may be set to an arbitrary value of 30% or more.

The main body display unit 20 includes a display board 21, a plurality of pointer display units 22, and an image display unit 25. The display board 21 is also generally called a dial, and is arranged on the viewing side of the compartment 12b of the viewing side case 12. The display plate 21 is formed in a flat plate shape by partially applying semipermeable or light-shielding printing on the surface of a transparent base material such as an acrylic resin or a polycarbonate resin. Instead of printing, painting may be applied.

Two of the plurality of pointer display units 22 are provided in the present embodiment, and are arranged in the area on the left side of the vehicle and the area on the right side of the vehicle on the display board 21, respectively. Here, since the two pointer display units 22 have the same configuration as each other, the guideline display unit 22 on the right side of the vehicle will be described as a representative.

As shown in FIG. 2, the pointer display unit 22 has a stepping motor 23 and a pointer 24. The stepping motor 23 is held by a main circuit board 26 arranged between the back side case 11 and the partition portion 12b.

The pointer 24 integrally has a connecting portion 24a and an indicating portion 24b. The connecting portion 24a is arranged through a through hole formed in the display plate 21 and is connected to the rotating shaft of the stepping motor 23. The indicator 24b is arranged on the visual side of the display plate 21 and has a needle shape. The pointer 24 rotates according to the output of the stepping motor 23, and by instructing the index 21a, vehicle information corresponding to the instructed position is displayed. Further, the pointer 24 emits light by being illuminated by the light emitting element 26a mounted on the main circuit board 26.

As shown in FIG. 1, the index 21a is formed by printing on the display board 21 to arrange the scale and the characters corresponding to the scale in a partial annular shape. In the present embodiment, the index 21a corresponding to the pointer display unit 22 on the right side of the vehicle is an index for displaying the speed of the vehicle. On the other hand, the index 21a corresponding to the pointer display unit on the right side of the vehicle is an index for displaying the engine speed of the vehicle.

As shown in FIGS. 2 and 3, the image display unit 25 is arranged in the central region of the device 100 sandwiched between the two pointer display units 22. The image display unit 25 has a display 25a arranged in accordance with the opening 21b opened in the display board 21 on the visual side of the main circuit board 26. As the display 25a of the present embodiment, a liquid crystal display using a thin film transistor (TFT) is adopted. As the display 25a, another display such as an organic EL display can be adopted.

Such a display 25a has a display screen 25b having a rectangular outline and a flat shape for displaying an image on the viewing side. The light of the image displayed on the display screen 25b passes through the opening 21b of the display plate 21 and further passes through the light transmitting plate 30.

The translucent plate 30 is formed translucently with a synthetic resin such as an acrylic resin or a polycarbonate resin, and has a flat plate shape having a front plate surface 31a on the visual side and a back plate surface 31b on the back side. The light transmitting plate 30 is provided substantially parallel to the display plate 21 and the display screen 25b of the display 25a. More specifically, as shown in FIGS. It is fixed to 21. By bringing the back plate surface 31b into contact with the periphery of the opening 21b, the translucent plate 30 forms a slight gap between the back plate surface 31b and the display screen 25b at substantially constant intervals. ing.

In the present embodiment, the outer contour formed by the outer edges 32a, 32b, 32c, 32d of the light transmitting plate 30 has a pentagonal shape as shown in FIG. Specifically, the outer edge portion 32a on the left side of the vehicle and the outer edge portion 32b on the right side of the vehicle extend linearly and parallel to each other along the direction from the upper side of the vehicle to the lower side of the vehicle. The outer edge portion 32c on the lower side of the vehicle extends linearly from the left side of the vehicle to the right side of the vehicle.

On the other hand, the outer edge portion 32d on the upper side of the vehicle has a tapered structure that tapers toward the upper side of the vehicle so as to protrude toward the upper side of the vehicle. The outer edge portions 32d having such a tapered structure are connected to each other and have a pair of outer edge edges 32e having an obtuse angle on the inner side of the light transmitting plate 30 (see also FIG. 7). Each outer edge 32e extends linearly. Each of these outer edge edges 32e has a long and thin flat shape and a mirror surface shape having a width corresponding to the plate thickness. The light source unit 50 is provided so as to face each outer edge side 32e of the outer edge portion 32d.

As shown in FIGS. 1 and 3, the light source unit 50 provides the light source light to the light transmitting plate 30. Specifically, the light source unit 50 is composed of a holding member 51, a pair of light source substrates 52, a plurality of light emitting elements 53, a pair of optical sheet members 54, and the like, and is a light source unit that can be easily attached to and detached from the case unit 10. Is forming. The holding member 51 is arranged so as to face the outer edge portion 32d of the light transmitting plate 30 by, for example, a light-shielding base material made of synthetic resin. The holding member 51 is held by fastening the visible side case 12 with, for example, a screw 55.

In particular, in the present embodiment, the holding member 51 has a pair of elongated plates 51a that are elongated along the obtuse angle so as to match the pair of outer edge edges 32e. Each elongated plate 51a has a plurality of through holes 51b penetrating the elongated plate 51a arranged along the extending direction of the opposite outer edge 32e.

The pair of light source substrates 52 are individually provided corresponding to the pair of elongated plates 51a, and are held on the corresponding elongated plates 51a on the opposite side of the light transmitting plate 30. Each light source substrate 52 mounts the same number of light emitting elements 53 as the through holes 51b. Since the light emitting elements 53 are arranged so as to be aligned with the center of the corresponding through hole 51b, the light emitting elements 53 are arranged with each other so as to face the outer edge 32e with the optical sheet member 54 interposed therebetween at substantially regular intervals. A light emitting diode is adopted for each light emitting element 53, and each light emitting element 53 emits light by being connected to a power source through a conduction pattern on the light source substrate 52. The plurality of light emitting elements 53 are provided so as to be able to switch on or off at the same time, and emit light from a light source in the same color as each other. In particular, each light emitting element 53 of the present embodiment is adapted to emit white light source light.

The pair of optical sheet members 54 are individually provided corresponding to the pair of elongated plates 51a, and are held on the light transmitting plate 30 side by the corresponding elongated plates 51a. Each optical sheet member 54 is formed in a thin plate shape by semi-translucent printing on the entire one surface of a translucent base material such as an acrylic resin or a polycarbonate resin. Each optical sheet member 54 is translucently colored, for example, blue, and is a color filter that converts the color tone of the light source light emitted by each light emitting element 53.

Further, a light leakage regulation space SP2 surrounding the light source unit 50 is formed between the viewing side case 12 and the plate window member 13. By arranging the light source unit 50 in the light leakage regulation space SP2, light leakage of the light source light to other than the light transmitting plate 30 is regulated.

The light source light emitted from each light emitting element 53 is transmitted through the optical sheet member 54 and then introduced into the inside of the light transmitting plate 30 via the outer edge 32e of the outer edge 32d. That is, the outer edge 32e is an incident portion where the light source light is incident on the light transmitting plate 30. The light source light introduced into the inside of the plate of the translucent plate 30 travels inside the plate with the direction from the upper side of the vehicle to the lower side of the vehicle as the traveling direction PD. The light source light traveling inside the plate includes light traveling in various directions from each light emitting element 53, and the traveling direction PD referred to here is an average of the various directions in consideration of the intensity. Means direction.

In response to the introduction of the light source light into the plate, the translucent plate 30 has a reflection display portion 33 and a groove portion 40. As shown in FIGS. 4 to 6, the reflection display unit 33 is an element formed by being recessed from the back plate surface 31b toward the front plate surface 31a, and is a plurality of finely sized elements having a recess depth of about 5 to 20 μm. It has a reflecting element 35. As shown in FIG. 1, the reflection display unit 33 forms a symbol 34 that is macroscopically visible to the occupant by appropriately arranging a plurality of reflection elements 35. In particular, in the present embodiment, the symbol 34 is formed by arranging the plurality of reflecting elements 35 in two dimensions along the back plate surface 31b. Since each reflecting element 35 has a reflecting surface 37 that reflects the light source light introduced into the plate to the visual recognition side, the symbol 34 shines like a surface light source and is displayed.

Specifically, in the present embodiment, the symbol 34 is a decorative symbol that decorates the image display unit 25. By partially superimposing the reflection display unit 33 of the present embodiment on the display screen 25b on the visual side of the image display unit 25, the periphery of the display screen 25b is bordered over the entire circumference as a symbol 34. Is provided with a frame pattern formed in a rectangular ring shape. The symbol 34 is arranged so as to surround the image displayed on the display screen 25b without hiding it.

As shown in FIGS. 4 to 6, the plurality of reflecting elements 35 include a composite reflecting element 36. In particular, in the present embodiment, all the reflecting elements 35 constituting the reflection display unit 33 are composite reflecting elements 36.

Each composite reflecting element 36 is formed by being recessed in a triangular pyramid shape from the back plate surface 31b toward the front plate surface 31a. In particular, as shown in FIG. 4, each composite reflecting element 36 has an isosceles right triangle shape on a plan view of the translucent plate 30 perpendicular to the back plate surface 31b along the plate thickness direction TD. Each composite reflective element 36 has a composite reflective surface 37 composed of two inclined surfaces 37a and 37b, and an element back surface 38.

The two inclined surfaces 37a and 37b are arranged at positions corresponding to the isosceles triangles on the plan view. The two inclined surfaces 37a and 37b are two surfaces of the triangular pyramid-shaped composite reflecting element 36 facing the outer edge portion 32d on the upper side of the vehicle into which the light source light is introduced, and have a triangular outer contour. Each is formed.

Each composite reflecting element 36 has a linear connecting side 36b that connects two inclined surfaces 37a and 37b along a cross section that bisects the apex angle (or base) of an isosceles triangle shape on a plan view. Have. The connection side 36b is inclined so as to move from the back plate surface 31b side to the front plate surface 31a side so as to be further separated from the outer edge portion 32d on the upper side of the vehicle into which the light source light is introduced, and is particularly shown in FIG. As described above, the inclination angle is, for example, 45 degrees with respect to the plate thickness direction TD. Similar to the connection side 36b, the inclined surfaces 37a and 37b are also separated from the outer edge portion 32d on the upper side of the vehicle into which the light source light is introduced so as to move from the back plate surface 31b side to the front plate surface 31a side. It is tilted. The inclined surfaces 37a and 37b also have an inclined angle of, for example, 45 degrees with respect to the plate thickness direction TD on the cross section parallel to the cross section that bisects the apex angle described above.

Further, the two inclined surfaces 37a and 37b are set so as to have different orientations with respect to the outer edge side 32e of the outer edge portion 32d. Specifically, the two inclined surfaces 37a and 37b face each other diagonally sideways along the inclined sides of the isosceles triangle on the plan view. The inclined surface 37a on the left side of the vehicle faces slightly to the left side of the vehicle, and the inclined surface 37b on the right side of the vehicle faces slightly to the right side of the vehicle. Specifically, in the present embodiment, in the triangular pyramid-shaped composite reflecting element 36, particularly on a vertical cross section perpendicular to the cross section that includes the concave bottom portion 36a having the deepest recessed depth and bisects the apex angle described above. As shown in 6, the two inclined surfaces 37a and 37b are inclined in opposite directions with respect to the back plate surface 31b at an inclination angle of, for example, 10 degrees.

As shown in FIGS. It is formed facing. The back surface 38 of the element has an outer contour formed in a triangular planar shape. The back surface 38 of the element is inclined so as to move from the back plate surface 31b side toward the front plate surface 31a side toward the outer edge portion 32d on the upper side of the vehicle into which the light source light is introduced. It has an inclination angle of degrees.

In the present embodiment, the composite reflecting elements 36 are separated from each other by the arrangement pitches PT1 and PT2 set in the arrangement directions D1 and D2, respectively, via the flat portion 39 formed flat on the back plate surface 31b. They are arranged one by one in isolation. The arrangement direction D1 is along the direction from the upper side of the vehicle to the lower side of the vehicle, which is the main traveling direction PD of the light source light, and the arrangement direction D2 is a direction substantially perpendicular to the traveling direction PD in the arrangement direction D1. It has become.

The plurality of composite reflection elements 36 are arranged in a so-called staggered pattern in which the positions of the concave bottom portions 36a are shifted by half the arrangement pitches PT1 and PT2 for each row. Here, the arrangement pitches PT1 and PT2 of the composite reflection element 36 are set to extremely small values with respect to the arrangement pitch of the light emitting element 53 of the light source unit 50.

As shown in FIGS. 1, 7 and 8, the groove 40 is arranged between the outer edge 32e of the outer edge 32d above the vehicle into which the light source light is introduced and the reflection display 33. More specifically, the groove 40 has a pair of extension grooves 41. Each extension groove 41 extends substantially parallel to each outer edge 32e at a certain interval from each outer edge 32e in the outer edge 32d above the vehicle. The pair of extension grooves 41 are arranged so as to form an blunt angle on the reflection display portion 33 side by connecting one end portion to each other. Therefore, each extending groove 41 is extended so as to intersect the traveling direction PD of the light source light inside the plate. In this way, the groove portion 40 is arranged so as to avoid overlapping with the display screen 25b of the image display unit 25.

Contrary to the reflecting element 35, each extending groove 41 has a bottomed groove shape that is recessed from the front plate surface 31a to the back plate surface 31b. Specifically, each extension groove 41 has a bottom surface 42 and a pair of inner wall surfaces 43a and 43b facing each other. The bottom surface 42 is provided in a flat and mirror surface shape so as to be substantially parallel to the front plate surface 31a and the back plate surface 31b.

Of the pair of inner wall surfaces 43a and 43b, the inner wall surface 43a on the outer edge side 32e side is 7.5 degrees to 12.1 degrees so as to move away from the outer edge side 32e from the front plate surface 31a side to the back plate surface 31b side. It is provided in a planar shape that is inclined in a range of 5 degrees, preferably an inclination angle of 10 degrees. Of the pair of inner wall surfaces 43a and 43b, the inner wall surface 43b on the reflection display unit 33 side is 7.5 degrees or more so as to move away from the reflection display unit 33 as it goes from the front plate surface 31a side to the back plate surface 31b side. It is provided in a plane shape that is inclined in a range of 12.5 degrees, preferably an inclination angle of 10 degrees.

In this way, the groove space SP1 recessed by each of the extending grooves 41 of the groove portion 40 is formed so as to be surrounded by the bottom surface 42 and the pair of inner wall surfaces 43a and 43b. In the groove space SP1, the front plate surface 31a side is open so that it communicates with the light leakage regulation space SP2. Here, the width dimension WD of each extension groove 41 on the front plate surface 31a side is set in the range of 1.2 to 2.2 mm, preferably 1.7 mm.

Further, the groove portion 40 is provided with a diffusion portion 44 that diffuses the light source light incident from the light source portion 50 and emits it to the reflection display unit 33 side. Specifically, the diffusion portion 44 is provided by forming both inner wall surfaces 43a and 43b in a rough surface shape. Such rough inner wall surfaces 43a and 43b are realized by a method or the like in which a mold for forming the translucent plate 30 is textured.

In the formation of the diffusion portion 44, at least the inner wall surface 43b on the reflection display unit 33 side can be roughened to obtain the minimum diffusion action, so that the inner wall surface 43a on the outer edge 32e side is a mirror surface. It may be formed in a shape.

As shown in FIGS. 9 and 10, a part of the light source light introduced into the plate from the outer edge 32e of the outer edge 32d (see the solid line arrow in FIGS. 9 and 10) is reflected and displayed via the groove 40. Reach unit 33. The light source light incident on the groove 40 is first diffused on the inner wall surface 43a on the outer edge 32e side, passes through the groove space SP1, and then further diffused on the inner wall surface 43b on the reflection display 33 side. Since such light source light is diffused twice, it is incident on the reflection display unit 33 with less uneven illumination.

When the inner wall surface 43a on the outer edge 32e side is formed in a mirror shape, it is diffused once on the inner wall surface 43b, so that the effect of reducing illumination unevenness is lower than in the case of two times. Since the light source light diffused on the inner wall surface 43a is suppressed from escaping to the space SP2 through the groove space SP1, the illumination efficiency is improved.

Further, another part of the light source light introduced into the plate from the outer edge 32e of the outer edge 32d (see the broken line arrow in FIG. 9) passes through the back plate surface 31b side of the bottom surface 42 of the groove 40. Then, the reflection display unit 33 is reached without passing through the groove portion 40. Such light source light may be formed in a flat and mirror-like shape on each outer edge 32e, and is incident on the reflection display unit 33 while leaving illumination unevenness according to the arrangement interval of the light emitting elements 53.

The ratio of the light source light passing through the groove 40 to the light source light not passing through the groove 40 is determined by appropriately setting the recess depth DP of the extension groove 41 indicated by the distance from the front plate surface 31a to the bottom surface 42. It is adjustable. The recess depth DP of each drawing groove 41 is set in the range of 1.7 to 2.3 mm, preferably 2.0 mm, with respect to the thickness of the translucent plate 30 of about 3 mm.

Due to the light source light passing through the groove portion 40, the reflection display unit 33 causes the symbol 34 to emit light and display like a surface light source with relatively uniform brightness. Further, due to the presence of the light source light that does not pass through the groove 40, the reflection display unit 33 superimposes the light source light on the surface light source type light emission display, and causes the light source image by the plurality of point light source type light source elements 53 in the symbol 34. It is possible to display the composite reflecting element 36 by imprinting it on the arranged area.

More specifically, since the composite reflecting element 36 reflects the light source light by the composite reflecting surface 37 composed of the two inclined surfaces 37a and 37b, it depends on the angle at which the viewer sees the symbol 34 of the reflection display unit 33. , The appearance of the light source image changes.

For example, when the viewer visually recognizes the symbol 34 so as to look down slightly from the upper side of the vehicle, a plurality of linearly extending light source images are reflected according to the arrangement interval of the light emitting elements 53, and stripes are formed on the symbol 34 of the reflection display unit 33. Causes uneven brightness. When the viewer visually recognizes the symbol 34 from the front along the plate thickness direction TD of the translucent plate 30, the linearly extending light source image is reflected twice as much as in the above case, and the symbol 34 has a complicated stripe shape. Causes uneven brightness. When the viewer visually recognizes the symbol 34 so as to look up slightly from the lower side of the vehicle, the number of light source images returns to the first case.

If the occupant as a visual observer is, for example, a driver, the symbol 34 is visually recognized as shining due to the movement of the eye position accompanying the driving operation of the vehicle. Since the composite reflection elements 36 are arranged in a staggered pattern, it is possible to give a relatively gentle impression while expressing a glittering feeling in the symbol 34.

On the other hand, when the light source unit 50 is turned off and the light source light is not introduced into the inside of the translucent plate 30, the symbols 34 are mostly formed due to the fine size of each reflecting element 35 formed through the flat portion 39. It is not visible.

(Action effect)
The effects of the first embodiment described above will be described again below.

According to the first embodiment, the groove 40 arranged between the outer edge 32e as the incident portion and the reflection display portion 33 extends so as to intersect the traveling direction PD of the light source light inside the plate. Therefore, at least a part of the light source light provided by the light source unit 50 is introduced into the inside of the plate through the outer edge 32e of the light transmitting plate 30, and before reaching the reflection display unit 33, the traveling direction PD thereof. It will pass through the groove 40 that intersects with. Therefore, the direct irradiation of the light source light to the reflection display unit 33 is restricted. When passing through the groove 40, for example, the illumination unevenness of the light source light can be alleviated, and the irradiation state of the light source light to each reflecting element 35 of the reflection display unit 33 can be adjusted. The occurrence of unevenness can be suppressed. Therefore, in the vehicle display device 100, the appearance of the symbol 34 of the reflection display unit 33 can be improved.

Further, according to the first embodiment, the groove portion 40 has a diffusion portion 44 that diffuses the incident light source light and emits it to the reflection display portion 33 side. At least a part of the light source light introduced into the plate is diffused by the diffusing portion 44 provided in the groove portion 40, so that the illumination unevenness of the light source light is surely alleviated, and each reflecting element of the reflection display portion 33. The irradiation state of the light source light to 35 can be adjusted. Therefore, the occurrence of unintended luminance unevenness in the shining symbol 34 is surely suppressed.

Further, according to the first embodiment, the diffusion portion 44 is provided by forming the inner wall surfaces 43a and 43b of the groove portion 40 in a rough surface shape. By doing so, since the diffusion portion 44 can be provided while suppressing the addition of parts, it is possible to easily suppress the occurrence of unintended luminance unevenness in the shining symbol 34.

Further, according to the first embodiment, the groove portion 40 is formed in a bottomed groove shape. In this way, by adjusting the recess depth DP of the groove 40, the ratio of the light source light passing through the groove 40 to the entire light source light introduced into the plate through the outer edge 32e can be set. .. Therefore, it is possible to make adjustments so as to intentionally leave a small amount of luminance unevenness while suppressing the occurrence of unintended luminance unevenness in the shining symbol 34. Therefore, it is possible to realize appropriate brightness unevenness and make the appearance of the reflection display unit 33 attractive.

Further, according to the first embodiment, the light source light is introduced into the two inclined surfaces 37a and 37b provided on the composite reflecting surface 37 of the composite reflecting element 36 from the back plate surface 31b side toward the front plate surface 31a side. Although they have a common feature of being inclined so as to be separated from each other with respect to the outer edge 32e, the directions are different from each other. In the reflection of the light source light to the visual recognition side by the composite reflective element 36, when the viewer shakes the line-of-sight position, the way in which the brightness changes differs between the two inclined surfaces 37a and 37b, so that the composite reflective element 36 is used. The design 34 of the reflection display unit 33 including the reflection display unit 33 shines brilliantly and is visually recognized. Since the display of the symbol 34 to which the glittering feeling is given is realized by the reflection display unit 33, the appearance is further improved.

Further, according to the first embodiment, the light source units 50 are arranged with each other so as to face the outer edge 32e, and have a plurality of light emitting elements 53 that emit light from the light source. If the light source light from the light source unit 50 having such a configuration is directly applied to the reflection display unit 33, each light emitting element 53 is reflected in the design 34 of the reflection display unit, and the brightness unevenness is extremely remarkable. It becomes something like that. However, in the present disclosure, since the groove portion 40 adjusts the irradiation state of the light source light to each of the reflection elements 35 of the reflection display unit 33, the unintended luminance unevenness due to the reflection of each light emitting element 53 is alleviated, and the symbol 34 It can be made to look good.

Further, according to the first embodiment, in the light transmitting plate 30, the reflection display unit 33 overlaps with the display screen 25b on the visual side of the image display unit 25, and the groove portion 40 avoids overlapping with the display screen 25b. It is arranged so that. In such a configuration, the reflection display unit 33 overlaps with the image display unit 25 so that the combination of the two display units 33 and 25 can display an exceptional appearance, while the groove portion 40 does not interfere with the image display unit 25. Therefore, it is possible to prevent the image display of the image display unit 25 from being hindered by the groove 40. Therefore, the appearance is even better.

(Second Embodiment)
As shown in FIGS. 11 and 12, the second embodiment is a modification of the first embodiment. The second embodiment will be described focusing on the points different from those of the first embodiment.

The light transmitting plate 30 of the second embodiment is provided with a groove portion 240 having a pair of extending grooves 241 as in the first embodiment. The groove portion 240 of the second embodiment also has a diffusion portion 244 that diffuses the light source light incident on the groove portion 240 and emits it to the reflection display unit 33 side. However, in the second embodiment, since both inner wall surfaces 243a and 243b and the bottom surface 242 are formed in a mirror surface shape, the diffusion portion 244 is provided by forming the inner wall surfaces 243a, 243b and the like in a rough surface shape. Not at all.

Specifically, the diffusion portion 244 of the second embodiment is provided by arranging the diffusion member 245 in the groove space SP1 recessed by each extension groove 241 of the groove portion 240. The diffusing member 245 is made of a light diffusing material. The light diffusing material is, for example, a milky white material obtained by mixing a light-transmitting synthetic resin with diffusing particles such as beads or bubbles that diffuse light. Further, as the light diffusing material, silicone rubber or the like having light diffusing property can be adopted.

The diffusion member 245 has a rod shape having a trapezoidal cross section that fills most of the groove space SP1 in accordance with the shape of the groove space SP1. The height of the diffusion member 245 is set to be substantially equal to the recess depth DP of the extension groove 241. Therefore, the diffusion member 245 forms a contact surface 245a that abuts on the bottom surface 242 on the back surface side. A flat exposed surface 245b along the front plate surface 31a is formed on the viewing side. Further, the width of the diffusion member 245 is formed slightly smaller than the width of the extension groove 241. As a result, the side surface 245c of the diffusion member 245 forms a gap of about 0.1 mm from both inner wall surfaces 243a and 243b, respectively.

A part of the light source light thus introduced into the plate from the outer edge 32e (see the solid line arrow in FIG. 12) reaches the reflection display unit 33 via the groove portion 240. Since the light source light incident on the groove portion 240 is diffused by the diffusing member 245, it is incident on the reflection display unit 33 with less uneven illumination.

Also in the second embodiment described above, similarly to the first embodiment, the groove portion 240 arranged between the outer edge edge 32e and the reflection display unit 33 intersects the traveling direction PD of the light source light inside the plate. It is stretched to. Therefore, it is possible to exert the action and effect according to the first embodiment.

Further, according to the second embodiment, the diffusion portion 244 is provided by arranging the diffusion member 245 formed of the light diffusion material in the groove space SP1 recessed by the groove portion 240. By filling the groove space SP1 with the diffusing portion 244, when the light source light passes through the groove space SP1, the light source light is prevented from leaking to the outside of the light transmitting plate 30, and the light source light is diffused. Can be given. Therefore, it is possible to reliably suppress the occurrence of unintended luminance unevenness in the shining symbol 34 while efficiently irradiating each reflecting element 35 with the light source light. Therefore, the appearance of the design 34 of the reflection display unit 33 becomes even better.

(Third Embodiment)
As shown in FIGS. 13 to 15, the third embodiment is a modification of the first embodiment. The third embodiment will be described focusing on the points different from those of the first embodiment.

The light transmitting plate 30 of the third embodiment is provided with a groove portion 340 having a pair of extending grooves 341 as in the first embodiment. As shown in FIGS. 13 and 14, the groove portion 340 of the third embodiment also has a diffusion portion 344 that diffuses the light source light incident on the groove portion 340 and emits it to the reflection display unit 33 side.

Specifically, the diffusion portion 344 of the third embodiment is provided by forming the inner wall surface 343a on the outer edge 32e side into a wavy surface that is continuously curved in a wavy shape along the extending direction of the groove portion 340. There is. As shown enlarged in FIG. 15, the wavy surface is curved with a sine-curved waveform that repeats peaks and valleys based on a fixed period. The constant period TW represented by the distance between the adjacent mountain-side extremum points EP1 or the distance between the adjacent valley-side extremum points EP2 is set sufficiently smaller than the arrangement interval of the light emitting elements 53, and is concrete. In addition, it is set in the range of 0.3 to 0.5 mm, preferably 0.4 mm. The deviation amount AW in the width direction of each extension groove 341 between the peak side extreme value point EP1 and the valley side extreme value point EP2 corresponding to the total amplitude in the waveform of the wavy surface is set sufficiently smaller than the width dimension WD of the extension groove 341. It is set in the range of 0.03 to 0.05 mm, preferably 0.04 mm.

Further, the radius of curvature R1 at the mountain-side extremum point EP1 on the wavy surface and the radius of curvature R2 at the valley-side extremum point EP2 on the wavy surface are different from each other. In detail, the radius of curvature R1 at the peak-side extremum point EP1 is set to be larger than the radius of curvature R2 at the valley-side extremum point EP2. The radius of curvature R1 at the peak point EP1 is set in the range of 0.3 to 0.4 mm, preferably 0.35 mm. The radius of curvature R2 at the valley-side extremum point EP2 is set in the range of 0.1 to 0.2 mm, preferably 0.15 mm. Therefore, the wavy surface is more strictly curved with the waveform of a deformed sine curve that is a slight modification of the sine curve.

On the other hand, in the third embodiment, the inner wall surface 343b and the bottom surface 342 on the reflection display unit 33 side are formed in a flat and mirror surface shape as shown in FIG.

Also in the third embodiment described above, similarly to the first embodiment, the groove portion 340 arranged between the outer edge edge 32e and the reflection display portion 33 intersects the traveling direction PD of the light source light inside the plate. It is stretched to. Therefore, it is possible to exert the action and effect according to the first embodiment.

Further, according to the third embodiment, the diffusion portion 344 is provided by forming the inner wall surface 343a of the groove portion 340 into a wavy surface curved in a wavy shape along the extending direction of the groove portion 340. With such a wavy surface, not only the diffusion portion 344 can be provided while suppressing the addition of parts, but also the appearance of the reflection display unit 33 including appropriate brightness unevenness can be improved by appropriately adjusting the shape of the wavy surface. It can be easily optimized.

(Fourth Embodiment)
As shown in FIGS. 16 to 18, the fourth embodiment is a modification of the first embodiment. The fourth embodiment will be described focusing on the points different from those of the first embodiment.

As shown in FIGS. 16 and 17, the light transmitting plate 30 of the fourth embodiment is provided with a groove portion 440 having a pair of extending grooves 441 as in the first embodiment. The groove portion 440 of the fourth embodiment is formed in a through groove shape penetrating between the front plate surface 31a and the back plate surface 31b. The groove portion 440 of the fourth embodiment is not provided with the diffusion portion 44, but is provided with a parallelization portion 446 instead.

While the divergent light is provided as the light source light from each light emitting element 53 of the light source unit 50, the parallelizing unit 446 parallelizes the light source light as the divergent light incident on the groove portion 440 and moves to the reflection display unit 33 side. Eject. The parallelization in the present embodiment means that the light source light is closer to the parallel luminous flux than the state in which the light source light is radiated as divergent light from the light emitting element 53, and the parallelized light source light is completely parallel. It does not have to be a luminous flux.

Specifically, the parallelizing portion 446 arranges a plurality of refracting surfaces 447 on the inner wall surface 443a on the outer edge side 32e side so as to individually correspond to each light emitting element 53. The parallelizing portion 446 has a lens array shape in which the refracting surfaces 447 are continuously arranged.

In the present embodiment in which the refraction surface 447 is arranged on the inner wall surface 443a on the outer edge 32e side, the light source light is temporarily emitted from the inside of the plate having a high refractive index to the groove space SP1 having a low refractive index on the refraction surface 447. .. Therefore, when the refracting surface 447 parallelizes the light source light by condensing the light source, each refracting surface 447 is formed in a curved surface shape that is convex toward the reflection display portion 33 side and the groove space SP1 side. In particular, in the present embodiment, each refracting surface 447 is formed in a cylindrical surface shape having a generatrix along the plate thickness direction TD.

The radius of curvature RN of each refracting surface 447 is set so that the brightness unevenness of the intended degree is realized in the reflection display unit 33. For example, if the radius of curvature RN is set so that the focal position of each refracting surface 447 substantially coincides with the position of the corresponding light emitting element 53, the light source light focused by each refracting surface 447 is theoretically generated. A parallel light beam is formed on a plane substantially orthogonal to the plate thickness direction TD, and the brightness unevenness in the reflection display unit 33 is minimized.

Further, for example, as shown in FIG. 18, when the radius of curvature RN is set so that the focal position of each refracting surface 447 is slightly deviated from the position of the corresponding light emitting element 53, the light is focused by each refracting surface 447. The resulting light source becomes a non-parallel luminous flux, and uneven brightness occurs in the reflection display unit 33 according to the degree of the light source. In the example of FIG. 18, the radius of curvature RN is set so that the focal position of each refracting surface 447 is located farther than the position of the corresponding light emitting element 53. Since the light source light collected by each of the refracting surfaces 447 is in a state of being slightly diverged on a plane substantially orthogonal to the plate thickness direction TD, a slight luminance unevenness intended by the reflection display unit 33 occurs.

On the other hand, in the fourth embodiment, the inner wall surface 443b and the bottom surface 442 on the reflection display unit 33 side are formed in a flat and mirror surface shape.

Also in the fourth embodiment described above, similarly to the first embodiment, the groove portion 440 arranged between the outer edge edge 32e and the reflection display portion 33 intersects the traveling direction PD of the light source light inside the plate. It is stretched to. Therefore, it is possible to exert the action and effect according to the first embodiment.

Further, if the diffused light is directly incident on the reflection display unit 33, the diffused light is diffused too much by the time the diffused light reaches the reflection display unit 33, and uneven illumination, a decrease in brightness, and the like become remarkable. However, according to the fourth embodiment, the groove portion 440 has a parallelization portion 446 that parallelizes the light source light as the divergent light incident on the groove portion 440 and emits it to the reflection display unit 33 side. By parallelizing the divergent light when passing through the groove portion 440, the illumination unevenness of the light source light can be alleviated, and the irradiation state of the light source light to each reflecting element 35 of the reflection display unit 33 can be adjusted. As a result, the reflection display unit 33 can be efficiently illuminated, and the occurrence of unintended luminance unevenness in the shining symbol 34 is suppressed. Therefore, the appearance of the symbol 34 is further improved.

Further, according to the fourth embodiment, the parallelizing portion 446 arranges a plurality of curved refracting surfaces 447 on the inner wall surface 443a of the groove portion 440 so as to individually correspond to each light emitting element 53. By being provided. By doing so, it is possible to reliably suppress unintended illumination unevenness that may occur due to the arrangement of the plurality of light emitting elements 53, such as the light sources from the respective light emitting elements 53 overlapping each other, and the refracting surface 447. By adjusting the curved surface shape, it is possible to easily leave a desired brightness unevenness, so that the appearance of the reflection display unit 33 can be made attractive.

(Other embodiments)
Although a plurality of embodiments have been described above, the invention is not construed as being limited to those embodiments, and can be applied to various embodiments and combinations within a range that does not deviate from the gist of the invention. ..

Specifically, as the first modification, the groove portion 40 may be configured by arranging the extension grooves 41 in a double or more manner. In the example shown in FIG. 19, by arranging the two pairs of stretching grooves 41 close to each other, the light source light passes through the stretching grooves 41 up to twice.

As a modification 2, the bottom surface 42 of the extension groove 41 may be formed in a rough surface shape in the groove portion 40.

As a modification 3, the diffusion portion 44 may not be provided. Specifically, both inner wall surfaces 43a and 43b and the bottom surface 42 of the extension groove 41 may be formed in a mirror shape, and the diffusion member 245 may not be arranged in the groove space SP1. Even with such a configuration, since the direct irradiation of the light source light to the reflection display unit 33 is restricted, the irradiation state of the light source light to each reflection element 35 of the reflection display unit 33 can be adjusted.

As a modification 4, the groove portion 40 may be formed in a bottomed groove shape recessed from the back plate surface 31b toward the front plate surface 31a.

As a modification 5 according to the first to third embodiments, the extension groove 41 of the groove portion 40 does not have to be formed in the shape of a bottomed groove. For example, the extension groove 41 may be formed in the shape of a through groove penetrating between the front plate surface 31a and the back plate surface 31b.

As a modification 6, if the extension groove 41 of the groove portion 40 is arranged between the outer edge side 32e and the reflection display portion 33, the extension groove 41 is arranged along the outer edge side 32e in the vicinity of the outer edge side 32e. No need.

As a modification 7, if the extending groove 41 of the groove portion 40 is extended so as to intersect the traveling direction PD of the light source light inside the plate, it may be extended in a curved shape instead of being linearly extended. good.

As a modification 8, the outer edge portion 32d on the upper side of the vehicle does not have to form a tapered structure that tapers toward the upper side of the vehicle so as to protrude toward the upper side of the vehicle by the pair of outer edge sides 32e, for example, one side. It may be formed flat by a straight outer edge. Correspondingly, the configuration of the light source unit 50 for incident the light source light on the outer edge as the incident unit can be appropriately changed. Further, the incident portion may be formed on the outer edge portions 32a to c other than the upper side of the vehicle, and the groove portion 40 may be arranged between the incident portion and the reflection display portion 33.

As a modification 9, the plurality of reflecting elements 35 of the reflection display unit 33 may include a composite reflecting element 36 only in a part thereof and a reflecting element having a single inclined surface in the other portion. Further, the plurality of reflecting elements 35 of the reflection display unit 33 may all have a single inclined surface.

As a modification 10, the plurality of reflecting elements 35 of the reflection display unit 33 may not be arranged in a staggered pattern, or may be arranged without gaps without passing through the flat portion 39.

As the modification 11, the symbol 34 is not limited to the decorative symbol superimposed on the image display unit 25. The symbol 34 may be displayed so as to be superimposed on the pointer display unit 22, or may not be superimposed on other displays at all. Further, the design 34 may display vehicle information by forming itself in the shape of a scale, a warning light, or the like, in addition to the function of decoration.

As a modification 12, the light transmitting plate 30 has a flat outer edge reflecting surface 61 provided at the outer edge portion 32d so as to be inclined toward the back side toward the outside, and an outer edge light guide extending from the outer edge reflecting surface 61 to the back side. It may have a part 62. In the example of FIG. 20, a plurality of light emitting elements 53 of the light source unit 50 are arranged so as to face the outer edge side 32e of the outer edge portion 32d arranged on the back surface side of the outer edge light guide unit 62 and the plate thickness direction TD. The light source light emitted from the positions different from each other by the plurality of light emitting elements 53 is guided to the outer edge reflecting surface 61 by the outer edge light guide unit 62, and further reflected to the inside of the light transmitting plate by the outer edge reflecting surface 61. Then, after the light source light passes through the groove portion 40, it reaches the reflection display portion 33. In the example of FIG. 20, the groove portion 40 may be arranged in the outer edge light guide portion 62.

As a modification 13, as shown in FIG. 21, the width dimension WD may be enlarged so that the width dimension WD of each extension groove 41 becomes larger than the recess depth DP. In this example based on the first embodiment, as shown in FIG. 22, the width dimension WD is larger than the recess depth DP. In this example based on the second embodiment, as shown in FIG. 23, it is possible to arrange a larger diffusion member 245 because the width dimension WD is larger than the recess depth DP.

As a modification 14 regarding the second embodiment, the side surface 245c of the diffusion member 245 is replaced with a flat surface and is curved in a continuous wavy shape along the extending direction of the groove portion 240 as in the third embodiment. It may be a wavy surface.

As the modification 15 according to the third embodiment, as the wavy surface, a zigzag wavy surface may be adopted instead of the sine curve shape.

As a modification 16 according to the fourth embodiment, the extension groove 441 of the groove portion 440 may be formed in a bottomed groove shape.

As a modification 17 according to the fourth embodiment, the refracting surface 447 may be formed in a spherical shape.

100 Vehicle display device, 30 Transmissive plate, 31a Front plate surface (plate surface), 31b Back plate surface (plate surface), 32e Outer edge (incident part), 33 Reflective display unit, 34 Design, 35 Reflective element, 37 Reflective surface, 40, 240, 340, 440 Groove, PD Travel direction

Claims (11)

A vehicle display device mounted on a vehicle.
A light source unit (50) that provides light source light and
A translucent plate (30) formed in a translucent plate shape and introducing the light source light into the plate through an incident portion (32e) is provided.
The translucent plate is
It has a plurality of reflecting elements (35) having a shape recessed from the plate surfaces (31a, 31b) and provided with a reflecting surface (37) for reflecting the light source light introduced into the plate to the visual recognition side. A reflection display unit (33) that illuminates and displays a design (34) formed by appropriately arranging elements, and
A vehicle having a groove portion (40, 240, 340, 440) arranged between the incident portion and the reflection display portion and extending so as to intersect the traveling direction (PD) of the light source light inside the plate. Display device for. The light source unit provides divergent light as the light source light.
The vehicle display device according to claim 1, wherein the groove portion has a parallelization portion (446) that parallelizes the light source light as incident divergent light and emits the light to the reflection display portion side. The light source units are arranged with each other so as to face the incident portion, and have a plurality of light emitting elements (53) that emit divergent light as the light source light.
The parallelizing portion is provided by arranging a plurality of curved refracting surfaces (447) on the inner wall surface (443a) of the groove portion so as to individually correspond to each of the light emitting elements. The vehicle display device according to claim 2. The vehicle display device according to claim 1, wherein the groove portion has a diffusion portion (44, 244, 344) that diffuses the incident light source light and emits it to the reflection display portion side. The vehicle display device according to claim 4, wherein the diffusion portion is provided by forming the inner wall surfaces (43a, 43b) of the groove portion in a rough surface shape. The vehicle display device according to claim 4 or 5, wherein the diffusion portion is provided by forming the inner wall surface (343a) of the groove portion into a wavy surface curved in a wavy shape along the extending direction of the groove portion. .. The method according to any one of claims 4 to 6, wherein the diffusion portion is provided by arranging a diffusion member (245) formed of a light diffusion material in a space (SP1) recessed by the groove portion. Display device for vehicles. The vehicle according to any one of claims 1, 2 or 4 to 7, wherein the light source units are arranged so as to face the incident portion and have a plurality of light emitting elements (53) that emit the light source light. Display device for. The vehicle display device according to any one of claims 1 to 8, wherein the groove portion is formed in a bottomed groove shape. The reflection display unit is formed so that the reflection element is recessed from the plate surface of the plate surface opposite to the viewing side.
The reflecting elements are inclined surfaces having different directions from each other, and the more they are directed from the plate surface side on the opposite side to the plate surface side on the viewing side, the more they are separated from the incident portion into which the light source light is introduced. The vehicle display device according to any one of claims 1 to 9, further comprising a composite reflective element (36) provided with the reflective surface composed of two inclined surfaces (37a, 37b) that are inclined as described above. .. An image display unit (25) having a display screen (25b) for displaying an image is further provided.
A claim that the translucent plate is arranged so that the reflection display unit overlaps with the display screen and the groove portion avoids overlapping with the display screen on the visual side of the image display unit. The vehicle display device according to any one of 1 to 10.

Images