JPH07290992A - Display device for vehicle - Google Patents

Abstract

PURPOSE:To heighten economy by miniaturizing a color liquid crystal display board to use. CONSTITUTION:Display information by each color is included on a dot matrix type light transmissive color liquid crystal display board 30, and the each color display information by this color liquid crystal display board 30 is divided into display information for each color and displayed by reflecting specific wavelength and using a plural number of wavelength selection reflectors 25-27 transmit wavelength except for the specific wavelength. Consequently, as it is possible to include a plural number of information in various colors on the color liquid crystal display board 30, even if with a small size color liquid crystal display board, it is possible to display a large amount of display information, and accordingly, economy of a color liquid crystal display board to use is improved.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vehicular display device for displaying a display by a display on a windshield of an automobile.

[0002]

2. Description of the Related Art As a conventional vehicle display device of this type (a display device using a head-up display), there is, for example, a structure as shown in FIG. This includes a display device case 3 having an opening 2 on the upper surface inside an instrument panel 1 provided in front of a driver's seat, and inside the display device case 3, a reflection plate 4 and the reflection plate 4 are provided. 4, a light source 5 for irradiating light toward the light source 4, a light diffusing plate 6 which is arranged so as to close the opening 2 and diffuses and transmits the light reflected by the reflecting plate 4, and the light diffusing plate 6 thereof.
A dot-matrix color liquid crystal display plate 7 having a transmissive property, which is superposed on top of it, a heat ray absorbing glass 8 arranged in front of the light source 5 for absorbing heat generated from the light source 5, and the color liquid crystal display plate. 7. A display device provided with a drive circuit 9 for driving and displaying 7; in order to perform display by the display device, the color liquid crystal display plate 7 is driven by the drive circuit 9 and the light source 5 is turned on at the same time. As a result, the illumination by the light source 5 is reflected by the reflector 4 and the color liquid crystal display panel 7 is transmitted and illuminated,
For example, the display 11 on the color liquid crystal display panel 7 as shown in FIG.
Is reflected on the windshield 10 so that the driver can visually check the display.

Further, the display 11 is such that vehicle speed information 11A in dot configuration, various alarms 11B, inter-vehicle distance information 11C, 11D, etc. are displayed in different colors.

[0004]

However, the color liquid crystal display panel 7 for displaying the plurality of displays 11A to 11D with the increase of the display information amount displays a plurality of information by one liquid crystal display panel. Since it is intended for the purpose, the display area of the color liquid crystal display plate 7 is inevitably large, which causes a problem that the cost of the color liquid crystal display plate 7 is significantly increased.

[0005]

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems of the prior art, and a combination of a transmissive color liquid crystal display panel having a small display area and a plurality of wavelength selective reflection plates, An object of the present invention is to provide a vehicular display device that can display a plurality of information in color even with a small color liquid crystal display panel.

[0006]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below in detail based on the embodiments shown in the drawings.

In FIG. 3, reference numeral 21 denotes an instrument panel provided in front of a vehicle compartment of an automobile. Inside the instrument panel 21, an opening 2 is formed on the upper surface.
A case 23 having 2 is installed. This case 2
Inside the light source 3, a light source 24 and a first wavelength selective reflection plate 25, a second wavelength selective reflection plate 26, and a third wavelength selective reflection plate 27 which are spaced apart in the irradiation direction of the light source 24 are provided. Has been done. Further, the light source 24 and the first wavelength selective reflection plate 25
Between the light source 24 side and the first wavelength selective reflection plate 25 side, the heat-transmissive heat ray absorbing glass 28, the light diffusion plate 29, and the dot matrix type light-transmissive color liquid crystal display plate. They are arranged in the order of 30.

The respective wavelength selection plates 25, 26, 27 are
It is installed at an inclination so that the light from the light source 24 can be reflected to the windshield 31. 32 is
A driving circuit for driving and displaying the color liquid crystal display panel 30 is shown. The first wavelength selective reflector is a wavelength selective reflector that reflects only blue and transmits other colors, for example, and the second wavelength selective reflector reflects only red and transmits other colors, for example. Wavelength selective reflector, third
The wavelength selective reflection plate is a wavelength selective reflection plate that reflects only yellow and transmits other colors. Further, the dot matrix type color liquid crystal display panel 30 can display dots in three colors of blue, red and yellow. As shown in FIG. 4, the vehicle speed information display 33A is blue and the vehicle speed information display 33A is red. The various alarm displays 33B are the inter-vehicle distance information displays 33C and 33D displayed in yellow. The above-mentioned information 33A, 33B, 33C and 33D are mixedly displayed on one color liquid crystal display panel 30, and The display area of the color liquid crystal display plate 30 is formed small.

The configuration of this embodiment has been described above. Next, the display operation will be described. First, when the light source 24 is turned on, the light emitted from the light source 24 is absorbed by the heat absorbing glass 28.
And then becomes a uniform surface light source by the action of the light diffusion plate 29, and reaches the color liquid crystal display plate 30. In the color liquid crystal display plate 30, a vehicle speed information display 33A is displayed in blue, various alarm displays 33B are displayed in red, and an inter-vehicle distance information display 33 is displayed in yellow, as described above, according to a control signal from the drive circuit 32.
C and 33D are mixedly displayed by dots. By transmitting the light from the light source to the color liquid crystal display plate 30 having such a display, only the vehicle speed information display 33A displayed in blue is displayed by the first wavelength selective reflection plate 25. Is reflected in the direction of the windshield 31, and the other red and yellow information displays pass through the first wavelength selective reflection plate 25 and reach the second wavelength selective reflection plate 26. Only the various alarm displays 33B displayed in red on the second wavelength selection reflection plate 26 are reflected toward the windshield 31, and the other yellow information displays are transmitted through the second wavelength selection reflection plate 26 to display the third wavelength selection reflection plate 33B. Of the wavelength selective reflection plate 27. On the third wavelength selective reflection plate 27, the inter-vehicle distance information displays 33C, 33D in yellow are displayed stepwise toward the windshield 31, and as a result, various displays 33A, 33B, 33C, 33D as shown in FIG. Are divided into upper and lower parts, and the displays are reflected by different colors.

As described above, according to this embodiment, since a plurality of displays can be dot-displayed in a mixed state on the dot matrix type color liquid crystal display plate, the color liquid crystal display plate can be made small and a large number can be displayed. be able to.
Therefore, a large amount of information can be displayed while the color liquid crystal display plate is downsized, and the economical efficiency of the color liquid crystal display plate used is greatly improved.

Further, various dot-shaped color displays mixed in the color liquid crystal display plate 30 are provided by a plurality of wavelength selective reflection plates 2.
5, 26 and 27 are separately displayed for each color, so that a clear information display is formed for each color.

[0012]

As described above, according to the present invention, the dot matrix type color liquid crystal display plate 30 which is transparent, the light source 24 disposed behind it, and the color liquid crystal display plate 3 are provided.
In a vehicular display device having a reflection plate that reflects light that has passed through 0 in the display area, a plurality of wavelength selective reflection plates 25, 2 that reflect a specific wavelength and transmit a wavelength other than the specific wavelength.
According to the vehicle display device in which 6 and 27 are arranged separately on the transmission optical axis of the light source 24, according to this, a plurality of displays are dot-displayed in a mixed state on the dot matrix type color liquid crystal display plate. Therefore, it is possible to display a large amount of information while making the color liquid crystal display panel small in size, and it is possible to obtain the effect of significantly improving the economical efficiency of the color liquid crystal display panel to be used.

[Brief description of drawings]

FIG. 1 is a structural explanatory view showing a display device of a conventional example.

FIG. 2 is an explanatory diagram showing a display mode of a conventional example.

FIG. 3 is a structural explanatory view showing a display device according to an embodiment of the present invention.

FIG. 4 is an explanatory diagram showing a display mode of an embodiment of the present invention.

[Explanation of symbols]

21 ... Instrument panel 22 ... Opening 23 ... Case 24 ... Light source 25 ... 1st wavelength selection reflection plate 26 ... 2nd wavelength selection reflection plate 27 ... 3rd wavelength selection reflection plate 28 ... Heat ray absorption glass 29 ... Light Diffusing plate 30 ... Color liquid crystal display plate 31 ... Windshield 32 ... Driving circuit

Claims (1)

[Claims] 1. A dot matrix type color liquid crystal display plate (30) which is light transmissive, a light source (24) disposed behind it, and light transmitted through the color liquid crystal display plate (30). In a vehicular display device having a reflection plate that reflects in a display area, a plurality of wavelength selection reflection plates (25), (2) that reflect a specific wavelength and transmit a wavelength other than the specific wavelength.
6) and (27) are arranged separately on the transmission optical axis of the light source (24).