JPH0615091U - Vehicle display - Google Patents

Abstract

(57) [Abstract] [Purpose] The display image of driving information such as traveling speed is reflected by the first reflection plate by reflecting the display light from the display device toward the eye point on the driver's side. Regarding a vehicular display device that can be visually recognized as a virtual image on a plate, it is possible to prevent a double image of a virtual image from occurring without changing the transmittance and the reflectance of the first reflecting plate with a simple configuration, It is intended to improve the display quality of a display image. [Structure] The display light L emitted from a display device (21) and transmitted through a first reflection plate 31 is first converted by a second reflection plate (41).
By reflecting the light L reflected from the second reflecting plate (41) toward the eyepoint E by the first reflecting plate 31 to reflect the light toward the eyepoint E. In the vehicle display device in which the display image of) is visually recognized as the virtual image (X) by the first reflection plate 31,
The non-reflective coating film 33 is provided on the surface 31b of the reflection plate 31 on the display (21) side.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 In this invention, the display light from the display device is reflected by the first reflection plate toward the eye point on the driver's seat side, so that the display image of the driving information such as the traveling speed is converted into a virtual image by the first reflection plate. The present invention relates to a display device for a vehicle that can be visually recognized.

[0002]

[Prior art]

 2. Description of the Related Art Conventionally, in some vehicular display devices, a reflection plate is used to accelerate the visual recognition speed, and a virtual image of a displayed image is displayed in a distant position. In such a vehicle display device, the longer the optical path length due to reflection is, the more effective the distance is displayed. Has been done.

FIG. 2 is a side view showing a schematic configuration of an example of the conventional vehicle display device described above. In FIG. 2, 11 is a meter hood portion of the dashboard, 21 is a self-luminous display such as a liquid crystal display or a fluorescent display tube for displaying driving information such as traveling speed provided in the dashboard, Reference numeral 31 denotes a light-transmitting first reflecting plate provided on the front surface side of the display 21, and the first reflecting plate 31 is made of, for example, dark-colored transparent smoke acrylic.

Reference numeral 41 denotes a second reflection plate facing the display device 21 via the first reflection plate 31, and totally reflects the supplied display light toward the first reflection plate 31. . L is the display light emitted from the display device 21 or reflected light, E is the eye point on the driver's seat side where the display image of the display device 21 is viewed, A is the viewing area, and this viewing area A is The first line L ₁ connecting the eye point E and the upper end of the second reflection plate 41 reflected on the first reflection plate 31, and the second reflection reflected on the eye point E and the first reflection plate 31 It is a range formed by the second line L ₂ connecting the lower end of the plate 41 and the second reflecting plate 41 reflected on the first reflecting plate 31. X represents a virtual image of the display image visually recognized in the viewing area A from the eyepoint E.

Next, the operation will be described. First, the display light L emitted from the display 21 is transmitted through the first reflection plate 31 and totally reflected by the second reflection plate 41. The reflected light L totally reflected by the second reflecting plate 41 is reflected by the first reflecting plate 31 toward the eye point E. Therefore, when the first reflector 31 is viewed from the eyepoint E, the display image of the display 21 can be visually recognized as the virtual image X in the visible area A in front of (back of) the first reflector 31. The virtual image X visually recognized in this way is displayed at a distant position corresponding to the optical path length in the visual recognition area A, so that the display has good visibility.

[0006]

[Problems to be solved by the device]

 Since the conventional vehicular display device is configured as described above, the reflected light L totally reflected from the second reflection plate 41 toward the first reflection plate 31 is as shown by the solid line in FIG. , Is reflected toward the eyepoint E by the surface 31a on the eyepoint E side of the first reflecting plate 31, and is incident on the first reflecting plate 31 from the surface 31a as shown by the dotted line in FIG. The light is reflected toward the eye point E on the surface 31b on the display 21 side.

As described above, when the reflected light L from the second reflection plate 41 is reflected toward the eyepoint E on both surfaces 31a and 31b of the first reflection plate 31, as shown in FIG. and X _a (image indicated by solid line) virtual image by the surface 31b due becomes a virtual image (image indicated by a dotted line) X _b and occurs in double image, disadvantageously with visibility is reduced, the display quality of the display image deteriorates was there. Therefore, in order to eliminate such an inconvenience, as shown in FIG. 5, a reflection film 32 is provided on the surface 31a of the first reflection plate 31, and the reflectance is increased to obtain _a virtual image Xa visible from the eye point E. , It is possible to make the brightness of the virtual image X _b different so as to make the virtual image X _b hard to see.

However, when the first reflection plate 31 is configured as shown in FIG. 5, the transmittance of the display light L that passes through the first reflection plate 31 is reduced, so that it can be visually recognized from the eye point E finally. There is a case in which the brightness of the virtual image X is significantly reduced and the virtual image X (X _a ) becomes difficult to see. Further, in order to eliminate the inconvenience described in FIG. 3, it is possible to reduce the thickness t of the first reflecting plate 31 and reduce the gap between the virtual image X _a and the virtual image X _b as shown in FIG. Conceivable.

However, as shown in FIG. 6, when the thickness t of the first reflection plate 31 is reduced, the strength of the first reflection plate 31 cannot be ensured and the first reflection plate 31 cannot be secured. There is an inconvenience that the display quality is deteriorated because the virtual image X is distorted due to the bending. The present invention has been made to solve the above-described inconvenience, and prevents a double image of a virtual image from occurring without changing the transmittance and the reflectance of the first reflecting plate with a simple configuration. (EN) A vehicle display device capable of improving the display quality of a display image.

[0010]

[Means for Solving the Problems]

 The vehicular display device according to the present invention has a non-reflective coating film on the display-side surface of the first reflector.

[0011]

[Action]

 The non-reflective coating film provided on the first reflecting plate in the present invention transmits the display light from the display and the reflected light from the second reflecting plate.

[0012]

【Example】

 An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is an enlarged cross-sectional view showing the structure of a first reflector used in a vehicle display device according to an embodiment of the present invention. The same or corresponding parts as those in FIGS. And the description is omitted. In FIG. 1, reference numeral 33 denotes an antireflection coating film provided on the surface 31b of the first reflector 31 on the display 21 side.

Next, an operation different from the conventional operation will be described. First, the display light L emitted from the display 21 is transmitted through the antireflection coating film 33 and the first reflection plate 31, and is totally reflected by the second reflection plate 41. The reflected light L totally reflected by the second reflecting plate 41 is reflected by the first reflecting plate 31 toward the eye point E. Thus, when the first reflection plate 31 reflects the reflected light L from the second reflection plate 41 toward the eyepoint E, the reflection that is incident from the surface 31a to the first reflection plate 31 as shown by the dotted line. Since the antireflection coating film 33 is provided on the surface 31b, most of the light L (about 99% or more) is not reflected by the surface 31b and passes through the antireflection coating film 33.

As described above, according to the embodiment of the present invention, the reflected light L reflected by the second reflection plate 41 and incident on the first reflection plate 31 is transmitted through the non-reflection coating film 33. , The eye point E is no longer reflected. Therefore, with the simple configuration in which the non-reflection coating film 33 is provided on the surface 31b of the first reflector 31 on the display 21 side, the virtual image X can be obtained without changing the transmittance and the reflectance of the first reflector 31. It is possible to prevent the double image from being generated, and it is possible to improve the display quality of the display image.

It should be noted that, in the above-described embodiment, the same effect can be obtained even if the reflecting film 32 is provided on the surface 31 a of the first reflecting plate 31.

[0016]

[Effect of device]

 As described above, according to this invention, since the non-reflective coating film is provided on the surface of the first reflection plate on the display side, it is reflected by the second reflection plate and is incident on the first reflection plate. The reflected light passes through the non-reflective coating film and is not reflected by the eye point. Therefore, a double image of a virtual image is generated without changing the transmittance and the reflectance of the first reflecting plate by a simple configuration in which a non-reflection coating film is provided on the display-side surface of the first reflecting plate. Can be prevented, and the display quality of the display image can be improved.

[Brief description of drawings]

FIG. 1 is an enlarged cross-sectional view showing a configuration of a first reflector used in a vehicle display device according to an embodiment of the present invention.

FIG. 2 is a side view showing a schematic configuration of an example of a conventional vehicle display device.

FIG. 3 is an explanatory diagram showing reflection of reflected light on a conventional first reflector.

FIG. 4 is an explanatory diagram showing a virtual image visually recognized from a conventional eye point.

FIG. 5 is an enlarged cross-sectional view showing another configuration of the conventional first reflector.

FIG. 6 is an enlarged side view showing still another configuration of the conventional first reflector.

[Explanation of symbols]

 21 Display 31 First Reflector 31a, 31b Surface 33 Non-Reflective Coating Film 41 Second Reflector L Display Light or Reflected Light E Eyepoint A Visual Area X Virtual Image

Claims (1)

[Scope of utility model registration request] 1. The display light emitted from a display device and transmitted through a first reflective plate having a light-transmitting property is transmitted to the first reflective plate by the second reflective plate.
By reflecting the light reflected from the second reflecting plate toward the eye point by the first reflecting plate, and displaying the display image of the display unit from the eye point to the first reflecting plate. In the vehicular display device that can be visually recognized as a virtual image with the first reflection plate, an antireflection coating film is provided on a surface of the first reflection plate on the display side, wherein the vehicular display device is characterized in that.