CN107068203B - Display device for displaying at least one state variable of a vehicle - Google Patents

Abstract

The present invention relates to a kind of for showing the display equipment (10) of at least one state parameter of the vehicles, wherein, around central axes (12), circular dial (14) is set, wherein, the dial (14) is arranged in the plane perpendicular to central axes (12).According to the rules, dial (14) has the groove (16) concentrically extended around central axes (12), its inner surface (18) towards central axes (12) with light transmission is with opposite relative to central axes (12) inclined outer surface (20), the rotatable annular element (34) of lighttight outer wall (36) is provided with inside inner surface (18), light source (28) are set inside annular element (34), and annular element (34) has light-emitting face (44) in the outer wall, it is arranged for showing at least one state parameter by the projection on outer surface (20) of the light that is issued by light-emitting face (44) according to the rotation position of annular element (34).Technical problem to be solved by the present invention lies in simplify the structure of display equipment.

Description

Display device for displaying at least one state variable of a vehicle

technical field

The invention relates to a display device for displaying at least one state variable of a vehicle or a vehicle.

Background technique

There are more and more changes in automobiles from analog to digital instruments, or from analog to digital displays. What is important here is good readability and driver approval at all times.

Patent documents DE 103 31 443 A1, DE 10 2005 046 714 A1 and DE 10 2004 060 693 A1 disclose display devices with pointers arranged on a ring, which are movably supported in the circumferential direction and point inwards , in order to display the state parameters of the vehicle.

US 2005/0139143 A1 discloses a graduated display with a rotatable lens with markings for orientation.

Complex constructions are often observed in the transition to digital meters.

The technical problem to be solved by the present invention is to simplify the structure of the display device.

Said technical problem is solved according to the invention by a display device for displaying at least one state variable of a vehicle.

The display device according to the invention is used to display at least one state variable of a vehicle, wherein a circular dial is provided which surrounds the central axis, wherein the dial is arranged in a plane perpendicular to the central axis, at This provides that the dial has a groove extending concentrically around the central axis with a light-transmitting inner surface facing the central axis Or the inner side and the opposite outer surface inclined with respect to the central axis Or the outer side, inside or inside the inner surface is arranged a rotatable annular member with a light-tight outer wall, a light source is arranged inside the annular member, and the annular member is in the outer wall with light exit surface The light exit surface is arranged to display at least one state parameter by projection of the light emitted by the light exit surface on the outer surface as a function of the rotational position of the ring. The concept "transparent" means that light rays can pass through, and also includes the concept translucent, which means having a reduced transmission so that a luminous outline or light source can only be perceived through occlusion.

The device according to the invention has the advantage that a simple structure without physical pointers is provided. Instead of a traditional or classic pointer with a pointer tip, a rotatable ring is used, which has a projection opening for projecting light patterns, such as lines. Furthermore, the display device can also be used in conjunction with a light source if it is used for illuminating the scale in addition to the projection.

The ring may be arranged between the dial and a light-tight base arranged concentrically about the central axis, wherein the upper edge of the base is in contact with the lower edge of the groove. This arrangement avoids scattered light, thereby improving readability and avoiding disturbance to the user. Preferably, the dial and the base body are glued to each other.

The light source may be arranged in the base body. The base body can correspond, for example, to a conventional instrument light box, which increases the compatibility of the proposed display device.

It can be provided that further light sources are arranged in the ring, facing the light exit surface. Light sources specially installed for projection can, for example, improve the projection quality of light strips in the event of poor lighting properties.

Furthermore, it can be provided that the outer surface has an angle of between 30° and 60°, preferably 45°, with respect to the central axis. The outer surface becomes the projection surface for the light strip. Said corners allow the light band to be displayed particularly clearly. Furthermore, the length of the projected light strip corresponding to the angle allows a good perception of the light strip.

The light exit surface may be a slit extending parallel to the central axis. The projection corresponding to this slit is a light strip, which can be perceived particularly well and moreover corresponds in its shape to a conventional pointer, so that the user can adapt quickly.

On the dial, scales with scale elements can be arranged concentrically around the central axis within the grooves. This arrangement allows good readability and has the advantage that only a single light source is required, which can also consist of several LEDs. The light source enables backlighting or illumination of the scale and projection through the light exit surface.

The scale elements can be embossed or gedruckt on the dial for backlighting, which allows simple manufacture and good readability.

The light exit surface can extend over the entire height of the inner surface, which creates a good projection.

The different embodiments of the invention mentioned in this application can be advantageously combined with each other, as long as they are not separately stated differently.

Description of drawings

The present invention will be described in the following embodiments in conjunction with the accompanying drawings. In the attached image:

Figure 1 shows a perspective view of a display device in partial cross-section;

Figure 2 shows a schematic cross-sectional view of the display device; and

FIG. 3 shows a schematic perspective view of the display device.

Detailed ways

Figures 1 and 2 show a display device 10, which can for example be installed in a vehicle such as a car, van, bus or the like. The display device 10 may also be installed in rail vehicles, air vehicles or water vehicles. The display device 10 may be installed separately or as part of the instrument cluster. A plurality of display devices 10 may be arranged in the instrument cluster. The display device 10 is a circular element with a central axis 12 .

The dials 14 of the display device 10 are arranged concentrically about the central axis 12 in a circular shape and extend in a plane perpendicular to the central axis. The dial 14 is in this embodiment a thin but dimensionally stable membrane and separates the rear portion of the display device 10 that is not visible to a user or viewer from the front visible display portion. Alternatively, a thin plastic body can also be used. The dial 14 can protrude beyond the actual display surface of the display device 10 and can be used for two or more display devices, for example.

The dial 14 has a groove 16 extending concentrically about the central axis 12 with a light-transmissive inner surface 18 facing the central axis 12 and an opposite outer surface 20 inclined relative to the central axis 12 . The viewing direction 22 extends substantially parallel to the central axis 12 . The recess 16 is designed in the viewing direction 22 towards the rear in a part that is not visible to the user or observer, so that the dial 14 forms a pot-shaped intermediate piece 24 inside the recess 16, the open side of which faces away from the user .

The inner surface 18 is oriented parallel to the central axis 12 and corresponds to the shape of the outer peripheral surface of a cylinder. The outer surface 20 is oriented at an angle α of between 30° and 60° with respect to the central axis 12 . The inner surface 18 and the outer surface 20 either intersect directly or are connected to each other by a small annular intermediate surface.

base bracket 26 (also referred to as a light box or reflector) is attached to the dial 14, for example by means of adhesive. The base carrier 26 is fastened in a light-tight manner in the region of the deepest point of the recess 16 (intersection of the inner surface 18 and the outer surface 20 ).

One or more light sources 28 , eg in the form of LEDs, are arranged on the underside of the base support 26 . The light source 28 is directed towards the dial 14 .

A scale 30 with scale elements 32 arranged concentrically around the central axis 12 is provided on the middle part. The scale elements 32 may include numbers as shown, but may also include symbols, such as reticles. The scale elements 32 are printed on the scale plate 14 for backlighting and are backlit by the light source 28 so that the scale elements are perceptible in the viewing direction 22 even in the dark.

A rotatable annular part 34 with a light-tight outer wall 36 is arranged inside the inner surface 18 or below the intermediate part 24 . The ring 34 is rotatably mounted about the central axis 12 and is driven and moved by a stepper motor 38 . The shaft 40 is supported in the stepper motor 38 and the intermediate piece 24 . A connecting beam 42 connects the central shaft 40 to the outer peripheral surface or wall 36 to ensure stability and to transmit rotational movement of the shaft 40 to the outer wall 36 . In order to avoid shadows, the connecting beams 42 are designed to be narrow. Alternatively, the light source 28 can also be fastened to the connecting beam 42 , and the required energy can be introduced via the rotating shaft 40 and the connecting beam 42 . The light source 28 is in any case arranged inside the ring part 34 or below or behind the intermediate part 24 .

A light exit surface 44 is provided on the outer wall 36 of the ring part 34 , which is here in the form of a slit. The light exit surface 44 preferably extends over the entire height of the inner surface 18 so as to obtain a good projection of the light emitted from the ring 34 (in the direction of the arrow in FIG. 1 ) onto the outer surface 20 . For this purpose, the ring 34 can, for example, have a greater height than the inner surface 18 and extend further in the direction of the stepper motor 38 .

The display device 10 is shown in perspective in FIG. 3 . As shown, the dial 14 has grooves 16 and graduations within the grooves 16 . The projections 46 are visible on both the inner surface 18 and the outer surface 20 and are caused by light emitted from the light exit surface 44 and produced by the light source 28 . The light path extends from the light source 28 through the slot-shaped light exit surface 44 and through the light-transmitting inner surface 18 . At least the projection 46 is perceptible to the observer at least on the inclined outer surface 20 .

The functions of the display device 10 are described below. Before the display device 10 is switched on, the display device appears completely black, at least in the recess 16, with no projections. Depending on the design, the scale elements may be visible already or only when the display device 10 is activated.

After the display device 10 is switched on, the light exit surface 44 and the scale element 32 are illuminated and the ring 34 with its light exit surface 44 is in the initial or zero position. When the state variable to be displayed changes, the stepper motor 38 receives a corresponding signal from the control device and rotates the ring 34 accordingly. It is visible to the user that the projection 46 moves along the scale 30 in the recess 16 to a position which corresponds to the value of the state variable to be displayed.

The proposed display device 10 allows a simple construction with good readability.

List of reference numbers

10 Display devices

12 central axis

14 dials

16 grooves

18 inner surface

20 outer surface

22 Viewing direction

24 Middleware

26 Base body or base support

28 light source

30 scale

32 Scale elements

34 Rings

36 outer wall

38 Stepper Motor

40 axes

42 Connecting beams

44 Light exit surface

46 Projection

alpha angle

Claims (10)

1. a kind of for showing the display equipment of at least one state parameter of the vehicles, wherein set around central axes (12) Set circular dial (14), wherein the dial (14) is arranged in the plane perpendicular to central axes (12), and feature exists There is the groove (16) concentrically extended around central axes (12) in, dial (14), the groove with light transmission towards The inner surface (18) of central axes (12) with opposite relative to central axes (12) inclined outer surface (20), in inner surface (18) Inside is provided with the revolvable annular element (34) of lighttight outer wall (36), and light source is arranged inside annular element (34) (28), and annular element (34) has light-emitting face (44) in the outer wall, and the light-emitting face is arranged for according to annular element (34) rotation position shows at least one shape by the projection on outer surface (20) of the light that is issued by light-emitting face (44) State property.

2. display equipment according to claim 1, which is characterized in that annular element (34) is arranged in dial (14) and surrounds Between the lighttight matrix (26) that central axes (12) are concentrically arranged, wherein the top edge and groove (16) of matrix (26) Lower edge contact.

3. display equipment according to claim 1 or 2, which is characterized in that light source (28) is arranged in matrix (26).

4. display equipment according to claim 1 or 2, which is characterized in that be disposed with towards light in annular element (34) Penetrate other light sources in face (44).

5. display equipment according to claim 1 or 2, which is characterized in that outer surface (20) have relative to central axes (12) angle between 30 ° to 60 °.

6. display equipment according to claim 1 or 2, which is characterized in that outer surface (20) have relative to central axes (12) 45 ° of angle.

7. display equipment according to claim 1 or 2, which is characterized in that light-emitting face (44) is parallel to central axes (12) joint-cutting extended.

8. display equipment according to claim 1 or 2, which is characterized in that internal in groove (16) on dial (14) Equipped with the scale (30) with scale element (32) concentrically arranged around central axes (12).

9. display equipment according to claim 8, which is characterized in that scale element (32) is printed on for backlight illumination On dial (14).

10. display equipment according to claim 1 or 2, which is characterized in that light-emitting face (44) is whole inner surface (18) Extend in a height.