JP2559615Y2 - Dial lighting structure - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION The present invention relates to a dial illuminating structure for illuminating a dial with light from a light source provided therein.

[0002]

2. Description of the Related Art Conventionally, as an illumination structure for a dial of this kind, as shown in FIGS.
There is known a device that illuminates the back surface of the dial 1 and illuminates the display 2 of the dial 1 brightly with light passing through the display 2 of the dial 1. And especially the light source
The display section 2 having a bright portion A close to 10 has a dial 1
The light control print layer 3 is provided on the back side of the display device 2 so that the brightness of the display unit 2 is constant.

[0003]

However, in the above-mentioned conventional dial lighting structure, the dimming printing layer 3 covers a part of the display unit 2 as shown in FIG. When viewed from the surface, that is, as shown in FIG. 8, there is a problem that the portion of the light control printing layer 3 becomes dark and a step due to light and dark occurs.

The present invention has been made to solve the above-mentioned problem, and an object of the invention is to provide an illumination structure for a dial plate capable of stabilizing the brightness of a display unit without causing a difference in brightness. Is to provide.

[0005]

In order to achieve the above-mentioned object, the present invention relates to a surface mark having a display portion on a surface of a transparent plate.
A printing layer is formed, and a colored transparent layer is formed on the back surface of the transparent plate.
And a light source provided on the back side of the dial
Consists of a irradiates the back surface of the dial by the light source, the light passing on the surface side from the display section of the dial, the dial of the color of the light exiting the colored transparent layer to illuminate brightly the display unit An illumination structure, wherein the colored transmission
On the back surface of the layer, a position corresponding to a particularly bright portion of the display portion is provided.
A light shielding layer surrounding the periphery of the device is provided.

It is preferable that the light-shielding layer is of a dark color such as black.

[0007]

In the illumination structure for a dial configured as described above, a light-shielding layer is provided on the back surface of the colored transmission layer so as to surround the periphery of a position corresponding to a particularly bright portion of the display unit .
For example, the light source is directly below the display unit, and for light that is incident orthogonally to this display unit, it is impossible to avoid incidence on the display unit even if there is a light shielding layer, but from the display unit With respect to light obliquely incident from a light source or the like at a distant position, the light can be prevented from entering the display unit by the light shielding layer. For this reason, the brightness of the display portion can be kept constant by reducing the brightness particularly in a bright portion. Moreover, since the light-shielding layer does not cover a part of the display unit, there is no difference in brightness between the display unit and the display unit.

In the case where the light-shielding layer is formed of a dark color, the light-shielding ability of obliquely incident light can be improved, and the ability of absorbing the light reaching the light-shielding layer can be improved. Since it is high, the periphery of the light-shielding layer can be entirely darkened. Therefore, in a particularly bright portion of the display section, the luminance can be further reduced, and the brightness of the display section can be made more constant.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to FIGS.

In FIG. 1, reference numeral 21 denotes a dial, and the dial 21 has a surface printing layer 23 of, for example, black, which is a ground color, on the surface of a transparent plate 22 made of polycarbonate or the like. The display portion 24 of scales, numerals, and the like is removed from the surface print layer 23, and the display portion 24 is printed in white. In addition, a colored transmission layer 25 is provided on the back surface of the transparent plate 22. The colored transmission layer 25 converts light emitted from a light bulb (light source) 10 provided therein into, for example, green, and is formed to have a uniform thickness by printing.

The back surface of the colored transmission layer 25 is shown in FIGS.
As shown in FIG. 5, a light-shielding layer 26 is provided so as to surround a position corresponding to a particularly high luminance portion A in the display section 24 in a U-shape. The light shielding layer 26 is printed with black ink.

A light guide plate 27 is provided above the bulb 10. The light guide plate 27 has a through hole 28 (FIG. 3).
), And a pointer (not shown) is illuminated from the through hole 28. However, the light of the bulb 10 passes through the light guide plate 27 and reaches the dial 21.

In the illumination structure for a dial having the above-described structure, the rear surface of the colored transmission layer 25 is formed in a U-shape around a position corresponding to a portion A having a particularly high luminance in the display section 24. Since the light shielding layer 26 is provided on the
Like the light C1, the light C1 that enters the display unit 24 at right angles to the display unit 24 is not affected by the light shielding layer 26.
Incident on the surface cannot be avoided. However, the display unit 24
The light C2 that is reflected from a light bulb located at a position distant from the camera or other members and is obliquely incident on the display unit 24 can be prevented from entering the display unit 24 by the light shielding layer 26.
Therefore, it is possible to reduce the brightness of the particularly bright portion A of the display unit 24, and to stabilize the brightness of the display unit 24. Moreover, since the light-shielding layer 26 does not cover a part of the display unit 24, there is no difference in brightness of the display unit 24.

Further, since the light shielding layer 26 is formed in black, the ability to block light with the light shielding layer 26 is high and the ability to absorb light reaching the light shielding layer 26 is high. Therefore, it is possible to prevent the light reflected by the light shielding layer 26 from entering the display unit 24 again, that is, it is possible to darken the entire periphery of the light shielding layer 26, and to further reduce the luminance. . Therefore, it is possible to make the brightness of the display section 24 having the portion A with particularly large brightness more constant.

Next, another embodiment of the above embodiment will be described with reference to FIG. However, the same components as those in the above embodiment are denoted by the same reference numerals, and the description thereof will be omitted. The other embodiment is different from the above embodiment in that the second colored transmission layer 29
It is a point which has.

The second colored transmission layer 29 is printed on the front surface side of the transparent plate 22.
The front surface printing layer 23 and the display unit 24 are provided on the front surface side of the substrate 9.

In the illumination structure for a dial configured as described above, in the daytime, the display section 24 can be seen in the color of the second colored transmission layer 29 due to light entering from outside. At night, the display unit 24 appears to shine with light from the light bulb 10.
At this time, the color of the display unit 24 is a combined color of the color transmission layer 25 and the second color transmission layer 29. That is, the color of the display unit 24 changes between daytime and nighttime. For this reason, for example, the conventional light control printing layer 3 (FIG. 6)
(See FIG. 2), the composition of light between the colored transmission layer 25 and the second colored transmission layer 29 changes during the night, and the display unit 24 may be partially covered. There is a possibility that a color difference may occur in the part. However, in the case of the other embodiments, since the light-shielding layer 26 does not cover the display unit 24, the display unit 24 may have a step due to light and darkness, and may also have a step due to a difference in color. Absent.

In the above embodiment, the light shielding layer 26 is used.
Is made of black, but it goes without saying that this light-shielding layer may be of another color. For example, the colored transmission layer 25 and the light shielding layer 26 may be printed simultaneously by making the colored transmission layer 25 green dot printing and the light shielding layer 26 solid green printing. However, it is preferable that the light-shielding layer 26 is of a dark color system such as black.

[0019]

According to the invention, the back surface of the colored transmission layer is provided.
Around the position corresponding to the brightest part of the display.
Because they provided no shading layer, for example the light source is in the right under the display section, this is with the incident come light to be perpendicular to the display unit, incident to the display unit even if the light-shielding layer Although it cannot be avoided, light obliquely incident from a light source or the like located at a position distant from the display unit can be prevented from entering the display unit by the light shielding layer. For this reason, the brightness of the display portion can be kept constant by reducing the brightness particularly in a bright portion. In addition, since the light-shielding layer does not cover the display unit, there is no step in the display unit due to brightness.

In the case where the light-shielding layer is formed of a dark color, the light-shielding ability of obliquely incident light can be improved and the ability of absorbing the light reaching the light-shielding layer can be improved. Since it is high, the periphery of the light-shielding layer can be entirely darkened. Therefore, in a particularly bright portion of the display portion, a greater reduction in luminance can be achieved,
The brightness of the display unit can be made more constant.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view of a dial lighting structure shown as one embodiment of the present invention.

FIG. 2 is a rear view of a main part of the dial shown as an illumination structure of the dial.

FIG. 3 is a front view of a lighting structure of the dial.

FIG. 4 is a cross-sectional view of a dial lighting structure shown as another embodiment of the present invention.

FIG. 5 is a front view of a dial illumination structure shown as a conventional example.

FIG. 6 is a cross-sectional view of the illumination structure of the dial.

FIG. 7 is a rear view of a main part of the dial shown as an illumination structure of the dial.

FIG. 8 is a front view of a main part of the dial shown as an illumination structure of the dial.

[Explanation of symbols]

 Reference Signs List 10 light source (bulb) 21 dial 24 display unit 26 light shielding layer

Claims (2)

(57) [Scope of request for utility model registration] 1. Surface printing with a display portion removed on the surface of a transparent plate
While forming a layer, a colored transparent layer on the back of the transparent plate
The formed dial and the light source provided on the back side of this dial
From it, irradiating the back side of the dial by the light source, the light passing on the surface side from the display section of the dial, the lighting of the dial of the color of the light exiting the colored transparent layer to illuminate brightly the display unit A lighting structure for a dial , wherein a light-shielding layer surrounding a position corresponding to a particularly bright portion of the display unit is provided on a back surface of the colored transmission layer . 2. The illumination structure for a dial according to claim 1, wherein the light-shielding layer is of a dark color such as black.