JP5247339B2 - Vehicle display device - Google Patents

Description

  The present invention relates to a display device for a vehicle, and more particularly to a display device for a vehicle that can make a display feel a depth and enables a high-quality display.

  2. Description of the Related Art Conventionally, as a display device for a vehicle installed in a vehicle such as an automobile, various devices have been proposed in order to enable high-quality display with excellent visibility. For example, a display panel having a transmissive portion and a frame body arranged behind the display panel are provided, and a stereoscopic effect is imparted to the display panel by enabling the frame body to be seen through the transmissive portion of the display panel. An instrument device as described above is disclosed (for example, see Patent Document 1).

In addition, an indicator portion capable of transmissive illumination and a transmitted light amount adjustment layer by gradation are provided on the display board, and a translucent substrate on which a diffuse transmission adjustment layer is formed is disposed on the back side of the display board, thereby transmitting the indicator portion. In addition to the above, there is disclosed an indicating instrument in which the illumination effect is made to stand out by gradation lighting with gradation (see, for example, Patent Document 2).
JP 2002-357461 A JP 2007-78604 A

  The instrument device disclosed in Patent Document 1 arranges a display panel and a frame so as to overlap each other, and makes it possible to visually recognize the frame through the transmission part of the display panel, thereby providing a three-dimensional expression. As shown in the figure, the frame is shaped by reflected light, so that there is no vividness compared to shaping by transmitted light and there is a problem that the display lacks a sense of depth. In addition, when gradation modeling by reflected light is performed on the frame, there is little change compared to gradation modeling by transmitted light, and there is room for improvement in order to display a more high-class display.

  In addition, the indicating instrument disclosed in Patent Document 2 displays the indicator part and gradation on the surface of the display board, but is flat because the gradation is displayed on the same display board as the indicator part. However, there is a problem that the depth is not felt in the display and it is difficult to obtain a three-dimensional effect.

  The present invention has been made in view of the above-described circumstances, and an object of the present invention is to provide a vehicular display device that can make a display feel a depth and can provide a high-quality gradation expression. .

In order to achieve the above-described object, the vehicle display device according to the present invention is characterized by the following (1) to (4) .
(1) a first light source;
A second light source;
A background board illuminated by transmitted light;
A diffusion light guide that irradiates the background board with light from the first light source ;
In a display device for a vehicle , comprising a dial on which a display unit having a character or scale shape is formed ,
The display unit is disposed in front of the background light in the irradiation direction of the first light source,
The dial is formed of a transparent resin and has a bottomed cylindrical shape having a through-hole at the center and an annular wall at the periphery, and the open end of the annular wall is at the first end. By arranging a plurality of light sources 2, the light from the second light source that has entered from the open end of the annular wall is scattered by the display unit and displays the characters or the scales.
On the other hand, the diffusion light guide emits light from the first light source from the first area of the background board in the vicinity of the through hole of the dial to the second area of the background board in the vicinity of the display unit. By irradiating the light from the bright light to the dark light, the background board receives the light attenuated from the bright light to the dark light from the diffusion light guide , and illuminates the dial by the transmitted light. about.
(2) The vehicle display device having the configuration of (1) above,
A pointer for indicating a part of the display unit is provided so as to be positioned in front of the dial in the irradiation direction .
(3) A vehicle display device having the configuration of (2) above,
A plurality of the first light sources are arranged along an arc shape centering on the vicinity of the pointer body when the background board is viewed from the front in the irradiation direction.
(4) The vehicle display device having the configuration of (3) above,
There are at least two types of colors of light emitted by each of the plurality of first light sources.

According to the vehicle display device having the configuration (1), the light received from the first light source is irradiated between the background board and the first light source with a contrast of light and dark toward the background board. Since the diffusion light guide is disposed, the light from the first light source is diffused from the bright light to the dark light from the first display area to the second display area of the background board by the diffusion light guide, and gradually becomes darker. Can be expressed. As a result, the display unit illuminated by the second light source can be visually recognized on the gradation by the light from the diffusion light guide that passes through the background board, so that there is more stereoscopic effect and luxury. Display is possible.
Further, according to the vehicle display device having the configuration (2), the diffusion light guide irradiates the light from the light source with a contrast of light and dark so as to reduce the light from the center to the peripheral portion of the background board. In addition, information such as the vehicle running speed and the engine speed can be instructed by the pointer on the background panel in which the display unit is three-dimensionally displayed on the gradation, so that a display device with a three-dimensional feeling and a high-class feeling can be obtained. .
Further, according to the vehicle display device having the configuration (3) , since the plurality of first light sources are arranged along the arc shape centering on the vicinity of the pointer body, the background board is uneven in the circumferential direction. It is possible to illuminate with a substantially uniform amount of light, and it is possible to provide a high-quality display with a beautiful gradation expression that becomes darker toward the periphery.
In addition, according to the vehicle display device having the configuration (4) , the background board is displayed in different colors by switching the light source that emits light by using two or more types of light sources having different emission colors. A display having a lighting effect can be realized.

  According to the vehicle display device of the present invention, light from the first light source is diffused from bright light to dark light from the first display area to the second display area of the background board, and a gradation that gradually becomes dark is expressed. Can do. As a result, the display unit illuminated by the second light source can be visually recognized on the gradation of the transmitted light that has passed through the background board, so that a more stereoscopic and high-class display can be achieved. .

  Hereinafter, embodiments of a vehicle display device according to the present invention will be described in detail with reference to the drawings. FIG. 1 is a front view of a vehicular display device according to the present invention, and FIG. 2 is a longitudinal sectional view taken along II-II of the vehicular display device in FIG.

  As shown in FIGS. 1 and 2, the vehicle display device 100 of the present invention is for displaying various vehicle information such as a vehicle traveling speed and an engine speed to notify the driver, and a background panel 10. And a dial 20, first to third light sources 31, 32, 33, a diffusion light guide 40, and a pointer body 50. In addition, the display apparatus 100 for vehicles of this embodiment is demonstrated taking the case where it applies to the tachometer which instruct | indicates engine speed.

  The background board 10 is formed by drawing a sheet-like transparent material such as a transparent acrylic resin or polycarbonate resin so as to have a substantially bowl-like shape having a ring-shaped edge 11 provided at the peripheral edge (the center of the background board 10 protrudes). The through-hole 12 is provided in the center.

  The dial 20 is formed of a transparent resin such as an acrylic resin or a polycarbonate resin in a bottomed cylindrical shape having a through hole 21 at the center and an annular wall 23 at the peripheral edge 22. In addition, the dial 20 is formed with a display unit 13 such as characters and scale lines. The display unit 13 is formed, for example, by printing a desired shape or unevenness on the back surface or front surface of the dial 20 or by embedding a scatterer inside the dial 20. Such a display unit 13 is printed on the outer peripheral side of the background board 10, in other words, in the vicinity of the movement locus of the tip 51 of the pointer body 50 described later.

  The display unit 13 instructs various vehicle information together with the pointer body 50. The display unit 13 in the present embodiment is composed of a number representing the engine speed (only a thousand digit is shown in FIG. 1) and a scale line formed on the outer peripheral side corresponding to this number. By not transmitting light through the line (transmitting light through the numbers and scale lines), the numbers and scale lines can be visually recognized.

  On the back surface (surface facing the first light source) side of the background board 10, a saddle-type support body 60 formed of synthetic resin is disposed. The saddle-shaped support body 60 includes a substantially annular peripheral portion 61, a cylindrical portion 63 formed at the center, and a vertical disc portion 62 that connects the peripheral portion 61 and the cylindrical portion 63. The upper surface (surface) of the bowl-shaped disk part 62 is an inclined curved surface 64 that gradually approaches the background disk 10 as it goes radially outward. A plurality of locking pins 65 projecting rearward are formed on the back surface side of the bowl-shaped disk portion 62. The saddle type support 60 has a locking pin 65 fitted in a hole 71 of a circuit board 70 for controlling the first to third light sources 31, 32, 33 and a stepping motor 72 described later. It is fixed to.

  The background board 10 is accommodated in the annular wall portion 23 of the dial 20 with the ring-shaped edge 11 sandwiched between the back surface of the dial 20 and the upper surface of the peripheral edge 61 of the saddle-shaped support body 60. . As a result, a gap S is formed between the bowl-shaped background board 10 and the dial 20. A cylindrical partition ring 73 that fits into the through hole 12 of the background board 10 and the through hole 21 of the dial 20 is concentric with the cylindrical part 63 of the bowl-shaped support body 60 and disposed on the circuit board 70. ing. The circuit board 70 is divided by a partition ring 73 into a pointer display region IS that is radially inside the partition ring 73 and a character display region OS that is radially outside the partition ring 73.

  On the circuit board 70, a third light source 33 such as a white LED is disposed inside the partition ring 73, that is, in the pointer display area IS, and the diffusion light guide is disposed outside the partition ring 73, that is, the character display area OS. A plurality of first light sources 31 such as red or blue LEDs are arranged facing the body 40.

  The diffusion light guide 40 receives the light emitted from the first light source 31 and diffuses it in the radial direction (in the directions of arrows B and C), and in the radial direction of the background board 10 toward the background board 10. This prism irradiates a contrast between light and dark, and is formed of a transparent resin such as a polycarbonate resin. The diffusion light guide 40 includes a light receiving portion 41 formed in an annular shape, a disc-shaped light emitting portion 42 extending radially outward from one end of the light receiving portion 41, and the light receiving portion 41 and the light emitting portion 42. And a reflection surface 43 formed at an angle of approximately 45 ° at the joint portion.

  The diffusion light guide 40 is disposed in the character display area OS, the light receiving portion 41 is disposed between the partition ring 73 and the cylindrical portion 63 of the saddle-shaped support body 60, and the emitting portion 42 is disposed on the background board 10. It is disposed between the back surface and the top surface of the saddle-shaped support body 60.

  The plurality of first light sources 31 arranged on the circuit board 70 on the radially outer side (character display area OS) of the partition ring 73 are arranged in an arc along the annular light receiving portion 41 of the diffusion light guide 40. Yes. The axial end surface of the light receiving portion 41 functions as the light incident surface 44, and the outer peripheral edge of the light emitting portion 42 functions as the light emitting surface 45. That is, the light emitted from the first light source 31 and incident in the axial direction from the light incident surface 44 of the diffusing light guide 40 to the light receiving portion 41 is converted in the traveling direction by 90 ° on the reflecting surface 43, and the emitting portion 42 is changed in diameter. The light is guided in the direction, emitted from the light exit surface 45, and diffused (arrow A direction). At this time, the light exit surface 45 irradiates the background board 10 with light guided in the radial direction, but the area of the background board 10 on the character display area IS side (near the pointer body 50) irradiates brightly. As it moves away from the character display area IS side, the light intensity is lowered and the light is radiated darker (the closer to the vicinity of the display unit 13, the darker it is).

  In the above description, the diffusion light guide 40 is used to irradiate the background board 10 with light and dark contrasts. However, the gradation of the background board 10 is light in color and gradually becomes darker toward the periphery. By performing printing (formed by smoke printing) on either the front surface or the back surface of the background board 10, gradation is expressed on the background board 10 when the transmitted light transmitted through the background board 10 is visually recognized. It may be. (The gradation printing applied to the background board 10 may be referred to as a gradation portion).

  A stepping motor 72 that rotates the rotating shaft 74 by an angle corresponding to an external electric signal is fixed at substantially the center of the circuit board 70. The rotating shaft 74 of the stepping motor 72 extends outside through the partition ring 73, and the pointer body 50 is fixed to the tip thereof.

  The pointer body 50 is formed of a transparent resin such as an acrylic resin, and is emitted from the third light source 33 that is disposed inside the partition ring 73 (pointer display area IS) and fixed to the circuit board 70 (arrow). For example, the light is emitted in orange. For example, a black cap 52 is attached to the center portion of the pointer body 50 to which the rotation shaft 74 of the stepping motor 72 is fixed so that the internal mechanism cannot be seen.

  A plurality of second light sources 32 such as LEDs are disposed on the circuit board 70 in correspondence with the open end 24 of the annular wall portion 23 of the dial 20. The annular wall portion 23 of the dial 20 is covered and protected by the frame body 75 together with the circuit board 70. The light emitted from the second light source 32 is guided into the dial 20 from the open end 24 of the annular wall 23 that is the incident surface (in the directions of arrows D and E) to illuminate the dial 20. At this time, when the display unit 13 formed on the dial 20 receives light from the second light source 32, the display unit 13 irregularly reflects the light, and as a result, the characters or scale lines formed by the display unit 13 emit light. Become.

  The operation of this embodiment will be described. As shown in FIGS. 1 and 2, the light emitted from the first light source 31 fixed to the circuit board 70 and arranged in an arc shape along the annular light receiving portion 41 of the diffusion light guide 40 is diffused and guided. The light enters the light receiving portion 41 from the light incident surface 44 of the light body 40 and travels in the axial direction (arrow A direction). 45 is emitted (in the direction of arrow B) and diffused. The diffused light is reflected by the inclined curved surface 64 of the bowl-shaped disc portion 62, passes through the background disc 10 (arrow C direction), and irradiates the display unit 13.

  At this time, since the light from the first light source 31 is diffused by the diffusion light guide 40, the central portion 14 of the background board 10 as the first area display is bright as shown in FIG. It gradually becomes darker toward the peripheral edge 15, and gradation is expressed when the dial 20 is irradiated with light transmitted through the background board 10. If the background board 10 is gradation-printed by smoke transmission printing, this gradation can be expressed with a further change in gradation (note that the diffusion light guide 40 is not used and the gradation part of the background board 10 is used). Only the dial 20 may be irradiated with a contrast of light and dark).

  On the other hand, the light emitted from the second light source 32 arranged to face the annular wall 23 of the dial 20 is guided into the dial 20 from the open end 24 of the annular wall 23 (in the direction of arrow D). The direction of travel of 90 ° is converted and the direction of arrow E is advanced, and the dial 20 is illuminated. At this time, the display unit 13 that has been irradiated with light from the second light source 32 emits characters or scale lines formed by the display unit 13.

  In this way, contrast of light and dark is emitted from the background board 10 and the display unit 13 emits light, so that the gradation emitted from the background board 10 shines at a position one step lower than the display unit 13 with the gap S interposed therebetween. It will be. As a result, a sense of distance occurs between the characters or scale lines formed by the display unit 13 and the gradation, and the driver who visually recognizes the vehicle display device of the present invention has the display unit 13 floating on the gradation 13. You will have the illusion of being. Thus, according to the vehicular display device of the present invention, it is possible to express with a stereoscopic effect and a high-class feeling that cannot be expressed with a conventional display device.

  Furthermore, the light emitted (in the direction of arrow F) from the third light source 33 disposed inside the partition ring 73 (pointer display area IS) causes the pointer body 50 to emit orange light, for example. The pointer body 50 is rotated by a stepping motor 72 in which a rotating shaft 74 rotates in accordance with an electrical signal proportional to the engine speed, and indicates the engine speed together with the display unit 13 of the background panel 10.

  The gradation portion of the background board 10 has been described as being transparent resin, or smoke-transparent-printed on a transparent resin. However, if the background board 10 is molded using smoke resin or light diffusion resin, smoke-transparent printing is not necessarily performed. There is no need to apply.

  Next, a modification of the vehicle display device will be described with reference to FIGS. FIG. 3 is a front view showing the arrangement of the light sources of the vehicle display device according to the modification, and FIG. 4 is an enlarged view of the central portion in FIG.

  As shown in FIGS. 3 and 4, the vehicular display device 100 includes two types of first light sources 31 (for example, a red LED 31 </ b> A and a blue LED 31 </ b> B) that emit different colors. The annular light receiving portions 41 are alternately arranged in the circumferential direction.

  As described above, according to the vehicle display device 100 including the two types of the first light sources 31A and 31B, the gradation expression of the background panel 10 is changed to red and blue by switching and operating the two types of the first light sources 31A and 31B. You can switch to and display. Thereby, for example, the background panel 10 is displayed in red in the normal state, and the background panel 10 is displayed in blue in the energy saving state, thereby realizing a display with a rich variation and excellent lighting effect. it can.

  As described above, according to the vehicle display device 100 of the present embodiment, the background board 10 is arranged on the back side of the dial 20 so that the display unit 13 emits light on the dial 20. Can be given to a person viewing the vehicular display device 100, and a high-quality display can be achieved.

  Note that the present invention is not limited to the above-described embodiments and modifications, and modifications, improvements, and the like can be made as appropriate.

  In the present invention, the example applied to the tachometer that displays the engine speed has been described. However, the present invention is not limited to this, and the display device that displays the vehicle traveling speed, the engine torque, the remaining amount of gasoline, and the like is also provided. The same can be applied.

It is a front view of the display apparatus for vehicles concerning the present invention. It is a longitudinal cross-sectional view of the display apparatus for vehicles in FIG. It is a front view which shows arrangement | positioning of each light source of the display apparatus for vehicles of a modification. It is an enlarged view of the center part in FIG.

Explanation of symbols

S gap 10 background board 13 display part 14 center part (first display area)
15 Perimeter (second display area)
20 Dial 31 (31A, 31B) First light source 32 Second light source 33 Third light source 40 Diffusion light guide 41 Light receiving part 50 Pointer body 51 Pointer body tip 100 Display device for vehicle

Claims (4)

A first light source;
A second light source;
A background board illuminated by transmitted light;
A diffusion light guide that irradiates the background board with light from the first light source ;
In a display device for a vehicle , comprising a dial on which a display unit having a character or scale shape is formed ,
The display unit is disposed in front of the background light in the irradiation direction of the first light source,
The dial is formed of a transparent resin and has a bottomed cylindrical shape having a through-hole at the center and an annular wall at the periphery, and the open end of the annular wall is at the first end. By arranging a plurality of light sources 2, the light from the second light source that has entered from the open end of the annular wall is scattered by the display unit and displays the characters or the scales.
On the other hand, the diffusion light guide emits light from the first light source from the first area of the background board in the vicinity of the through hole of the dial to the second area of the background board in the vicinity of the display unit. By irradiating the light from the bright light to the dark light, the background board receives the light attenuated from the bright light to the dark light from the diffusion light guide , and illuminates the dial by the transmitted light. A display device for a vehicle. The vehicle display device according to claim 1 , further comprising a pointer for pointing to a part of the display unit so as to be positioned in front of the dial in the irradiation direction .   3. The plurality of first light sources are arranged along an arc shape centered on the vicinity of the pointer body when the background board is viewed from the front in the irradiation direction. Vehicle display device.   The vehicle display device according to claim 3, wherein each of the plurality of first light sources emits at least two kinds of light colors.