JPH0749467Y2 - Display device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] (Field of Industrial Application) The present invention relates to a display device such as a speedometer used in an instrument panel of an automobile, and more particularly to improvement of a digital display structure.

(Prior Art) For example, an instrument panel of an automobile is equipped with a speedometer, an engine tachometer, and other display devices.
Conventionally, these display devices have been so-called analog display in which a pointer is rotatably supported on a circular scale plate.
However, this kind of display has a problem that it is necessary to read the scale each time, it is tedious and can be misread, and the design is inferior.

Therefore, in recent years, it has become mainstream to apply a liquid crystal device (LCD) to a display device of an instrument panel so that it is easy to read and versatile in design. That is,
As shown in FIGS. 3 and 4, it is composed of a transparent pattern control body a which is a liquid crystal device, and a light source device b which is provided separately from the transparent pattern control body a. In the translucent pattern control body a, the segments c that form characters are connected to electrodes (not shown), respectively, and the segments c are energized.
Only transparent. The light source device b is
For example, a cold cathode, an LED or a halogen lamp is used to emit light of a predetermined color. Therefore, the light emitted from the light source device b is transparent to the segment c ...
Will appear on the surface via, and the number will be displayed digitally, for example.

However, this kind of display is limited to a flat display and has no stereoscopic effect. There is no problem if the displayed characters are always viewed from the front, but the viewpoint is easily changed and the viewing angle is various, especially when driving a car. For example, when viewing the displayed characters from the lateral direction, it is very difficult to see because there is no stereoscopic effect, and there is the problem of so-called poor visibility. In order to improve the visibility, it is necessary to provide a digital display with a stereoscopic effect, which is completely impossible with the conventional liquid crystal device.

(Problems to be Solved by the Invention) The present invention is to improve the visibility and decoration by changing from a flat display to a three-dimensional display in the one provided with the liquid crystal transmissive pattern control body as described above. An object of the present invention is to provide a display device capable of improving the property.

[Constitution of device]

(Means for Solving Problems) That is, the present invention provides a light source device, a light-transmitting pattern control body made of liquid crystal that is provided separately from the light source device and a predetermined segment is made transparent by energizing the light source device, and the light-transmitting pattern control body. A united layer which is a thick film vapor-deposited layer for completely reflecting the light from the surface, and a united layer which is a light-transmitting color layer or a transparent layer only on the portion which is superposed on the light pattern control body and faces the above segment. A transparent plate made of a transparent resin material or a glass material which is superposed on the transparent plate, and a thin film vapor-deposition layer having a half mirror property which is superposed on the transparent plate and transmits a part of light from the transparent plate and reflects the remaining light. A certain screen layer is provided, and a part of the light transmitted through the translucent color layer or transparent layer of the united layer is between the thick film deposition layer of the united layer and the screen layer. The display device is characterized by being repeatedly reflected by.

(Operation) According to such a configuration, the light emitted from the light source device passes through the transparent color layer or the transparent layer and the transparent plate and the screen layer through the transparent segment of the transparent pattern control body. The energized segment image can be visually confirmed. Further, since the screen layer has a half mirror property, a part of the light is reflected here, and is reflected by the thick film vapor deposition layer which is the reflection layer of the united layer through the transparent plate. Since this reflected light goes out to the surface through the transparent plate and the screen layer, it appears with a small gap under the image and can be visually recognized. Hereinafter, due to the half-mirror property of the screen layer, a part of light is emitted and an image is further formed on the lower side, and part of the light is repeatedly reflected between the thick film vapor deposition layer and the screen layer. As a result, a multiple image having a narrow gap and having the darkest color density on the surface side and gradually lighter color density in the depth direction can be seen, and a three-dimensional pattern can be obtained.

Embodiment An embodiment of the present invention will be described below with reference to the drawings.
As shown in FIG. 1, a is a light-transmitting pattern control body which is a liquid crystal device, and b is a light source device, which can be exactly the same as the conventional one, and therefore a new description is omitted here. On the surface of the transparent pattern control body a,
An image forming body 5 composed of the united layer 1, the transparent plate 2 and the screen layer 4 provided with the antiglare film 3 is superposed. The united layer 1 is a light-transmitting color layer or a transparent layer (here, a light-transmitting color layer) 6 provided only in a portion of the light-transmitting pattern control body a facing a segment (not shown) here, and the light-transmitting property. The thick film vapor deposition layer 7 is provided over the entire area other than the color layer 6 and reflects all light.
The united layer 1 thus configured needs to have a thickness of 0.5 mm or more. The transparent plate 2 is a translucent member made of a transparent resin material such as polymethylmethacrylate or polycarbonate or a glass material, and has a thickness of 0.5 to 5 mm.
It needs a certain thickness. Further, the united layer 1 is brought into close contact with one surface of the transparent plate 2, and the screen layer 4 is brought into close contact with the other surface. The screen layer 4 is, for example, a thin film vapor deposition layer of an aluminum material and has a thickness of 100 to 300 Å. The anti-glare film 3 is made of black gloss coating or black printing coated on the surface of the screen layer 4, and prevents light from an electric light or the like from being reflected on the device body 8 to prevent glare. .

As shown in FIGS. 1 and 2, the light emitted from the light source device b is transmitted by turning on the light source device b and energizing the required segments c of the light transmission pattern control body a. The transparent color layer 6 is transmitted through the transparent segments c of the pattern control body a ... This colored light passes through the transparent plate 2 and the screen layer 4 and is thus energized by the segment c.
The portion can be visually recognized on the outermost surface of the apparatus body 8. However, since the screen layer 4 has a half mirror property, only a part of the light is transmitted to the outside through the antiglare film 3, and the remaining part of the light is reflected to the transparent plate. Through 2. Then, it reaches the thick film vapor deposition layer 7 of the united layer 1, is reflected there, and the reflected light is again visible on the surface through the transparent plate 2 and the screen layer 4. The image that can be visually recognized here is an image obtained with a narrow gap at the back of the image at the outermost surface. Further, due to the half-mirror property of the screen layer 4, a part of light is emitted and a part of the light is repeatedly reflected between the thick film deposition layer 7 and the screen layer 4, and so on. After all, the image displayed on the apparatus main body 8 is a normal liquid crystal display when viewed from the front, but when viewed from a position where the viewpoint is laterally displaced even a little, a plurality of narrow gaps exist from the surface side to the back. Image, that is, a multiple image, which is a pattern having a stereoscopic effect, can be seen. Of course, this multiple image has the darkest color density on the surface side due to the amount of reflected light and gradually changes to a light color density in the depth direction, which is very easy to see and has excellent decorativeness.

It should be noted that in the above embodiment, the present display device has been described as a speedometer used in an instrument panel of an automobile, for example, but the present invention is not limited to this and can be applied to all liquid crystal devices.

[Effect of the Invention] As described above, according to the present invention, the light emitted from the light source passes through the transparent segment of the transparent pattern control body (liquid crystal), is transmitted through the transparent color layer, and is colored. Part of the light is repeatedly reflected between the screen layer and the thick film deposition layer of the coalescence layer and appears on the surface, so that the liquid crystal pattern of multiple images can be seen, giving a rich three-dimensional effect and visibility. It is possible to improve the quality of the product, and the decorative property is good, and the product value is improved.

[Brief description of drawings]

1 and 2 show an embodiment of the present invention. FIG. 1 is a longitudinal sectional view of a display device, FIG. 2 is a perspective view of the display state, and FIGS. 3 and 4 show the present invention. The conventional example is shown below.
FIG. 4 is a schematic vertical sectional view of a display device which is a liquid crystal device, and FIG. 4 is a perspective view of its display state. b ... light source device, c ... segment, a ... translucent pattern control body, 6 ... translucent color layer, 7 ... thick film vapor deposition layer, 1
... coalescing layer, 2 ... transparent plate, 4 ... screen layer.

Claims (1)

[Scope of utility model registration request] 1. A light source device, a light-transmitting pattern control body made of liquid crystal which is provided separately from the light source device and is transparent to a predetermined segment when energized, and the segment is superposed on the light-transmitting pattern control body. The union layer, which is a light-transmitting color layer or transparent layer only in the part facing to the other part, and the other part is a thick film vapor deposition layer that completely reflects the light from the surface, and the transparent resin material or the glass material which is superposed on the union layer. And a screen layer which is a thin film vapor-deposition layer having a half mirror property which is superposed on the transparent plate and transmits a part of the light from the transparent plate and reflects the remaining light. Part of the light transmitted through the translucent color layer or transparent layer is repeatedly reflected between the thick film deposition layer of the united layer and the screen layer. That display device.