JPH03231119A - Display panel - Google Patents

Abstract

PURPOSE:To change color tone in the day and at night and to display the optimum design by providing the colored light-transmitting dot image layers on the upper surface and the lower surface of a light transmitting base layer, and providing a light source which can be lit appropriately at the back side of the dot image layer on the rear surface. CONSTITUTION:Dot image layers 2 and 3 are formed on the upper surface and the rear surface of a substrate 1. In the image layers 2 and 3, the original drawing of colors is resolved into the dot images of the four original colors of a color resolving device. A spot-shaped applied film layer is formed at each position on the substrate 1 in correspondence with the dot image. Then, the colored image corresponding to the original drawing of the color is reproduced with the combination of the spot-shaped applied film layer. When the light source 4 is not turned ON, only the image layer 2 on the upper surface of the substrate layer 1 is visually recognized by the reflection, and the image is recognized by the tone of the image layer 2. Meanwhile, when the light source 4 is turned ON, the light emitted from the light source is transmitted through the substrate layer 1 and the image layer 2, and the image is visually recognized with the other tone obtained by overlapping of the tones of the image layers 2 and 3. Therefore, the tone of the display panel can be largely changed at the time of ON and OFF of the light source 4.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a display panel 1, and more particularly to a display panel that can significantly change the color tone of a reflective image and a transmission image to provide an innovative design.

``Prior art'' Conventionally, in display panels used in vehicle instrument panels, color filters are installed on the back of the white numbers and characters, and the backlight illuminates the numbers and characters at night. It has been done to change to other colors other than bright.

[Problem M to be solved by the invention] However, in the above-mentioned conventional display panel, although the display color changes in the numerals etc. at night, the entire display panel has the same color tone as during the daytime, which makes it difficult to change the atmosphere inside the car at night. There was a strong demand for the color tone of the entire display panel to change in response to changes.

The present invention is in response to such a need, and aims to provide a display panel that greatly changes the overall color tone between daytime and nighttime and exhibits optimal design depending on the surrounding atmosphere.

[Means for Solving the Problems] The display panel of the present invention includes colored translucent halftone dot image layers 2 and 3 provided on the front and back sides of a translucent base layer 1, respectively,
A light source 4 that is turned on as appropriate is provided behind the back side halftone image layer 3.

[Function] In the display panel having the above configuration, when the light source 4 is not lit, only the halftone image layer 2 on the surface side of the base layer 1 is visible due to reflection, and the halftone image layer 2 on the surface side of the base layer 1 is visible. Images are recognized by color tone.

When the light source 4 is turned on, the light emitted from it is transmitted to the base layer 1.
It passes through the halftone image depth layer 2, and the pond color tone obtained by overlapping the color tones of these screen layers 2.3 is visible.4 Thus, the color tone of the display panel changes greatly depending on whether the light source is on or off. I can do something like two.

[First Embodiment] Figures 1 to 3 show an example in which the present invention is applied to a speed display type for a vehicle. Figure 1 is a front perspective view of the display panel, and Figure 2 is a rear perspective view thereof. FIG. 3 is a schematic sectional view thereof.

In the figure, 1 is a transparent white substrate that also serves as a base layer, and if its transmission density is in the range of 0.01 to 20, it will have a certain degree of reflection and transparency, and particularly preferably 0. It is in the range of .1 to 0.5.

The substrate 1 has halftone image layers 2.3 formed on each of its front and back surfaces. Each halftone image layer 2.3 is created using a color separation device (color scanner) to convert the color original into yellow (Y).
, magenta (M), cyan (C), black (B)
It is divided into halftone dot images of primary colors, and dotted coating layers of each primary color are formed at each position on the substrate 1 in correspondence with this halftone dot image.The combination of these dotted coating layers creates the above Reproduce a colored image corresponding to the color original.

As the above coating layer, the display panel (
You can use the one in 1-164520)
A predetermined portion of the film made of the colored photopolymerizable fat-absorbing composition is exposed to light and cured to form a large number of dot-shaped coating layers as described above to form a halftone image depth layer 2.3.

This image layer 2.3 can be formed with a density of 80 lines/1 nch or more. The transmission density of each dotted coating layer above is 0
When the value is in the range of 1 to 2.0, a deep color tone with transparency can be obtained, and it is more preferably in the range of 0.1 to 1.0.

Now, in FIG. 1, the halftone image layer 2 is not formed at each number and scale part of the speed display, and the white substrate 1 is not formed.
is exposed. The area 2a inside the scale is magenta with a halftone dot occupancy of 80% (M> dotted coating layer (hereinafter referred to as M2C).
) and cyan (C) with 100% dot occupancy.
) Dotted coating layer (hereinafter referred to as C100)
A deep halftone image is formed. In addition, the area outside the scale is (YLOOlMloo, C100
) A striped pattern 2c consisting of a halftone image layer is formed.

The halftone image@layer 3 formed on the back surface of the substrate 1 is formed only in the area inside the scale, as shown in FIG.
2O) Toshishita. A lamp 4 is provided behind the board 1 (FIG. 3), and is visible to the driver from the front side of the board 1.

The lamp 4 is turned on at night or the like.

In the display panel having the above structure, only the halftone image layer 2 on the substrate surface is reflected and recognized when the lamp is turned off.

That is, the scale and speed numbers are white, (M2C, C100) in the inner area 2a of the scale is fruit and vegetable color, and (Y2O, Mloo, C90) in the background 2b outside the scale and (Yloo, Mloo, C100) in the striped pattern 2C are all green. is also recognized as blackish brown, and as a result, the striped pattern 2C is not recognized.

When the lamp 4 is turned on at night, the lamp light enters the (Y2O) halftone image layer 3 directly in front of the substrate 1, passes through the halftone image layer 2 on the surface of the substrate 1, and is emitted forward.

As a result, the scale inner area 2a is (M 80,
The color tone of (Y2O) is added to the color tone of C100) and changes to greenish brown. On the other hand, the outer background 2b changes to bright brown as the lamp light passes through it, and the color tone of the striped pattern 2C hardly changes because only a small amount of lamp light passes through the striped pattern 2C.

Therefore, by lighting the lamp 4, the scale inner area 2a
The background 2b outside the scale changes from a dark brown to a lighter brown, and a blackish brown striped pattern 2c stands out in this background. In this way, the entire display panel changes to a warm tone at night.

The color tone of the halftone image layer 2.3 can be arbitrarily selected by combining the four primary color dotted coating layers. For example, halftone image layer 2.
3 are (B2O) and (C100), respectively, when the lamp is off, the light reflected from the halftone image layer 2 makes it visible as gray, and when the lamp is on, the light transmitted through the halftone image layer 3 becomes dark, resulting in a blackish blue color. . Further, when the halftone image layer 2.3 is set to (Yloo, C60) and (■100), respectively, the color becomes yellow-green when the lamp is off, and the color becomes brown when the lamp is on.

Furthermore, halftone image layers 2.3 (¥100) and (M
When set to ``loo'', a bright color is obtained when the lamp is turned off, and an orange color is obtained when the lamp is turned on.

By the way, the combination of the background 2b and the dotted coating layer constituting the striped pattern 2C is such that when the lamp 4 is turned off, both of them become a muddy blackish similar color.
The two shall be clearly distinguished when lit.
Z. Kaname is there.

According to experiments by the inventors, in order to realize this, both the above-mentioned colors are yellow (Y) and magenta (M) as in the above-mentioned embodiments.
, combine all three primary colors of cyan (C), or combine two primary colors with black, and combine one primary color with 20
It is better to have a difference of at least %. Other combinations of these two can be used as shown in the attached table.

[Second and Third Embodiments] Note that the white base layer 1 may be formed separately from the substrate without being shared with the substrate. For example, as shown in FIG. 4, a white coating film may be formed on one surface of the transparent substrate 11. Also, as shown in FIG. 5, a halftone image layer 3,
A structure may be adopted in which the base layer 1 and the halftone image layer 2 are sequentially formed.

1 Fourth and Fifth Embodiments As shown in FIG. 6, the halftone image layer 3 may be formed on the surface of the lamp 4.
As shown in the figure, a planar light emitting layer 4' such as an EL (electroluminescence) light emitting layer may be formed on the back surface of the halftone image layer 3.

In each of the above embodiments, not only a white light source but also a colored light source can be used as the light source, and the coloring of the halftone image layer is not necessarily limited to the four primary colors. moreover,
The base layer does not necessarily have to be white.

[Effects of the Invention] As described above, in the display type of the present invention, colored translucent halftone dots 1 are provided on the front and back sides of the translucent base layer, and one dot halftone dot on the back side is provided. By providing a light source behind the layer, the color tone of the entire display type can be greatly changed when the light source is turned on and off, and is particularly suitable for use in vehicle instruments.

Kuchiishi]

[Brief Description of the Drawings] Figures 1 to 3 show a first embodiment of the present invention.
The figure is a perspective view of the front surface of the display panel, FIG. 2 is a perspective view of the back surface thereof, FIG. 3 is a schematic cross-sectional view thereof, and FIGS. 4 to 7 are schematic cross-sections of the display panel showing second to fifth embodiments, respectively. It is a diagram. 1... Substrate (base layer) 11... Substrate 2. 3... Halftone image layer 4... Lamp (light source) 4°... EL light emitting layer (light source) Fig. 2 Fig. 3 Fig. 1 Figure 5 Figure 6 Figure 7 Figure 2

Claims (1)

[Claims] A colored translucent halftone image layer is provided on the front side and the back side of the translucent base layer, respectively, and behind the back side halftone image layer,
A display panel characterized by being provided with a light source that lights up appropriately.