JPH0652707A - Display device - Google Patents

Abstract

PURPOSE:To provide a display device capable of reducing the light leak from an indicator, making the information provided on the indicator easy to see, and improving the display quality of the information by successively thinning the end part of the indicator toward the outside. CONSTITUTION:A display device, which is provided on a combination meter of vehicle, for example, and used to display determined information as alarm display, adapts the following constitution. Namely, in a device for lighting a light source 4a arranged on the rear side of a tell-tail lens 5A as an indicator, thereby displaying the information (e.g. 5a) provided on the indicator 5A, the end part 5s on the front side of the tell-tail lens 5A is successively thinned toward outside. Since most of the light emitted after reflected in the tell-tail lens 5A is emitted from the end part 5s to the front because the end part 5s is tapered, and a slight quantity of the light is emitted from an end surface 5f, the information is made easy to see.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a display device provided in, for example, a combination meter of a vehicle and used to display predetermined information as a warning display.

[0002]

2. Description of the Related Art FIG. 3 is a partially exploded perspective view of a combination meter showing the above conventional display device, FIG. 4 is an enlarged sectional view taken along the line AA of FIG. 3, and FIG. 5 is a light path of a conventional telltale lens. FIG. In these drawings, reference numeral 1 indicates a facing back, and a plurality of cylindrical portions 2A, 2B, 2C are provided so as to project to the rear surface.

Reference numeral 3 is a wiring board arranged so as to close the tubular portions 2A to 2C from the rear side, 4A, 4B and 4C are valves, and the valve 4A is the position of the wiring board 3 corresponding to the tubular portion 2A. , The valve 4B is attached to the position of the wiring board 3 corresponding to the tubular portion 2B, and the valve 4C is attached to the position of the wiring board 3 corresponding to the tubular portion 2C. Reference numeral 5 denotes a telltale lens as a sign, which is a cylindrical portion 2A to 2C.
Is attached to the dial 1 so as to close it from the front side, and the respective information 5a to 5 is attached to the portions corresponding to the tubular portions 2A to 2C.
c is provided. L indicates the light from the bulbs 4A to 4C.

Next, the operation will be described. First, open the door to get on with the engine running,
The valve 4B is turned on by the control of a control circuit (not shown). When all the doors are closed after getting on the vehicle, the valve 4B is turned off. However, if at least one door is open and the bulb 4B remains lit, the light L from the bulb 4B is incident on the telltale lens 5 from the rear surface.

Then, a part of the light L incident on the telltale lens 5 is emitted to the front surface as shown by the solid line in FIG. However, other light L incident on the telltale lens 5
Is emitted when reflected in the telltale lens 5 or after repeating reflection. Therefore, when the driver starts the vehicle and looks at the tell tale lens 5 to check whether all the doors are closed or not, if all the doors are not closed, that is, even one door is opened. If so, the information 5b indicating that the vehicle is dangerous (picture of the vehicle with the door opened) is visible, and this information 5b serves as a warning display.

[0006]

In the conventional display device, the light L from the bulb 4B is emitted from the end face 5f after being reflected in the telltale lens 5 as shown by the dotted line in FIG. In this way, when the light L from the bulb 4B is emitted from the end surface 5f of the telltale lens 5, that is, when light leakage occurs, the area around the telltale lens 5 becomes brighter, and the information 5a to 5c provided on the telltale lens 5 is obtained. There is a problem that it becomes difficult to see and the display quality deteriorates.

The present invention has been made in order to eliminate the above-mentioned inconvenience, and reduces the light leakage from the sign to make it easier to see the information provided on the sign and improve the display quality of the information. The present invention provides a display device that can be operated.

[0008]

In the display device according to the present invention, the thickness of the marking body is gradually reduced with its end portion facing outward.

[0009]

In the sign body according to the present invention, the thickness is successively reduced with the end portions facing outward, so that the proportion of the light internally reflected from the end face is reduced.

[0010]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a perspective view showing a telltale lens used in a display device according to an embodiment of the present invention, and FIG. 2 is an explanatory view showing a light path of the telltale lens shown in FIG.
The same or corresponding parts as in FIG. In these figures, 5A shows a telltale lens as a sign, and the front end 5s is tapered so that the thickness thereof gradually decreases toward the outside.

First, a part of the light L from the bulbs 4A to 4C incident on the telltale lens 5A from the rear surface is emitted to the front surface as shown by a solid line in FIG. Then, the other light L incident on the telltale lens 5A is shown in FIG.
As indicated by the dotted line, the light is emitted after being reflected in the telltale lens 5A. This is the telltale lens 5A
Since the end 5s of the light L emitted after being reflected in the inside is tapered, most of the end 5s is tapered.
To the front surface, and a small amount of light exits from the end surface 5f.

As described above, according to the embodiment of the present invention, light leakage from the end surface 5f of the telltale lens 5A is reduced, so that the information 5a to 5c provided on the telltale lens 5A can be easily seen and Information 5a-5c
The display quality of is improved.

In the above-mentioned embodiment, the example in which the end portion 5s of the telltale lens 5A is tapered has been described.
A similar effect can be obtained even if the taper is rounded instead of the taper, that is, if the shape is such that the thickness is gradually reduced toward the outside. Also, the example has been described in which only the front end 5s of the telltale lens 5A has a shape in which the thickness is successively reduced toward the outside, but only the rear end 5s or the front and rear ends 5s may be formed. Similar effects can be obtained even with similar shapes.

Further, by providing a black print layer on at least one of the front surface and the rear surface of the tell tale lens 5A, the light L reflected in the tell tale lens 5A is sequentially absorbed in the print layer, so that the light from the end surface 5s is absorbed. Light leakage can be further reduced.

[0015]

As described above, according to the present invention, since the thickness of the marking body is gradually reduced toward the outside, the light reflected inside the marking body is emitted from the end face of the display body. The proportion will decrease. Therefore, by reducing the light leakage from the sign, the information provided on the sign can be easily viewed and the display quality of the information is improved.

[Brief description of drawings]

FIG. 1 is a perspective view showing a telltale lens used in a display device according to an embodiment of the present invention.

FIG. 2 is an explanatory diagram showing a light path of the telltale lens shown in FIG.

FIG. 3 is a partially exploded perspective view of a conventional combination meter.

FIG. 4 is an enlarged cross-sectional view taken along the line AA of FIG.

FIG. 5 is an explanatory diagram showing a light path of a conventional telltale lens.

[Explanation of symbols]

 1 Backward 2A, 2B, 2C Tube part 3 Wiring board 4A, 4B, 4C Valve 5A Tell tail lens 5a, 5b, 5c Information 5s End part 5f End surface L light

Claims (1)

[Claims] 1. A display device for displaying information provided on the sign by turning on a light source arranged on the rear side of the sign, wherein the thickness of the sign is gradually reduced toward the outside. did,
A display device characterized by the above.