JP4804368B2 - Variable display structure - Google Patents

Description

  The present invention belongs to the technical field of a variable display structure that switches and displays different displays on the same display surface.

Conventionally, the first region that transmits blue light in the first wavelength region, the second region that transmits green light in the second wavelength region, and other regions that form the background are printed and printed on the rear surface of the foil sheet, from the rear. The first light source of blue light and the second light source of green light are illuminated (see, for example, Patent Document 1).
Japanese Patent Laid-Open No. 2001-100699 (page 2-8, full view)

  However, in the past, white display was difficult, display color was limited, and display performance was not sufficient.

  The present invention has been made paying attention to the above problems, and an object thereof is to provide a variable display structure capable of performing white display and improving display performance.

In order to achieve the above object, according to the present invention, a light-transmitting sheet is switched so that the light of the first light source and the light of the second light source having different wavelengths are projected, and the first display and the second display are performed. A display structure, a blue light source provided as a first light source, a first printed portion applied to the sheet, which transmits the wavelength of the first light source and does not transmit the wavelength of the second light source, and the sheet A second printed portion that transmits the wavelength of the second light source and does not transmit the wavelength of the first light source; a background printed portion that does not transmit the wavelength of the first light source and the wavelength of the second light source; A dimming print part that suppresses and transmits the light of the first light source and the second light source, and a yellow light and a blue light that are output by excitation of a phosphor by blue light. Phosphor layer that converts to white light by the passing component of blue light and the passage of blue light Comprising a limited yellowing consisting printed layer white conversion unit, wherein the white conversion unit, the only fluorescent layer is obtained by thinning the phosphor layer than the case of converting to white, thinning the phosphor layer Thus, the yellow print layer is provided for adjusting the blue light component that is larger than the yellow light .

  Therefore, in the present invention, white display can be performed and display performance can be improved.

Hereinafter, the embodiments for implementing the variable display structure of the present invention will be described with reference to the first embodiment.

First, the configuration will be described.
FIG. 1 is a cross-sectional view showing the variable display structure of the first embodiment. FIG. 2 is a front view of the color filter having a variable display structure according to the first embodiment. 3 is a cross-sectional view taken along the line AA in FIG. FIG. 4 is an explanatory diagram showing a first display and a second display of the variable display structure of the first embodiment.
The first embodiment is used as a switch for inputting by pressing a variable display structure.

First, the switch 1 is provided with a rectangular frame-shaped guide housing 7 inside a rectangular frame-shaped switch finisher 2 (see FIG. 1).
The guide housing 7 is provided with a slidable rail portion in the direction from the opening surface of the rectangular frame-shaped switch finisher 2 to the opening surface, that is, the front and rear surfaces.
A plate-like substrate 6 that closes the opening is provided on the back side of the switch finisher 2 and the guide housing 7.
On the front side of the substrate 6, that is, on the inner side of the switch finisher 2, a red color light source 3 having a wavelength of about 640 nm and a blue color light source 4 having a wavelength of about 470 nm are pressed. A tact switch 5 for performing ON / OFF operation input is provided.

The color light source 3 and the color light source 4 are preferably LEDs from the viewpoint of cost reduction and maintainability, but may be different. The color light source 3 may be another color.
Next, a slider 8 having double frame portions inside and outside is provided. The inner frame portion of the slider 8 is shaped like a pyramid and narrows toward the color light source 3 and the color light source 4 side. Further, the frame-shaped portion inside the slider 8 extends rearward so as to cover the side of the color light source 3 and the color light source 4.
Furthermore, an engaging portion 8 a that protrudes downward is provided on the downwardly inclined surface of the frame-shaped portion inside the slider 8. The position of the engaging portion 8a is set to a position where it engages with the tact switch 5 when moved downward.

A color filter 10 is provided on the front surface portion of the inner frame portion of the slider 8.
Further, a fluorescent filter 9 is provided on the front surface of the color filter 10.
The fluorescent filter 9 is also called a YAG sheet.
A yellow printed portion 15 is provided on the entire front surface portion of the fluorescent filter 9.
Further, a smoke lens 11 having a generally low translucency is provided on the front surface portion of the yellow print portion 15 in order to prevent the print pattern from being seen by external light when the light is turned off.

Here, the slider 8 to which the smoke lens 11, the color filter 10, the fluorescent filter 9, and the yellow printing portion 15 are attached is engaged with the rail portion of the guide housing 7 so as to be slidable back and forth.
Thus, when the slider 8 is pushed toward the tact switch 5, the slider 8 slides and the engaging portion 8a having a shape protruding downward from the inclined surface pushes the tact switch 5.
Moreover, when it is set in a free state after being pushed, it is structured to return by the reaction force of the tact switch.

As shown in FIG. 2, the color filter 10 includes a first printed portion 10a, a second printed portion 10b, a third printed portion 10c, and a background printed portion 10d on the front surface of a transparent sheet 10e.
FIG. 5 is an explanatory diagram showing the relationship between the characteristics of the printed portion of the variable display structure of Example 1 and the wavelength of each light source.
Here, the first display 12 is a character “A” as shown in FIG. 4A, and the second display 13 is a character “E” as shown in FIG. 4B.
The first print portion 10 a is the portion of FIG. 2 that does not overlap the second display 13 “E” of “A” that is the first display 12. This portion is a portion where the blue print portion 101 that transmits blue light and the fluorescent filter 9 overlap. The characteristic of the transmission efficiency with respect to the wavelength of the blue printed portion 101 is the characteristic indicated by the line 23 in FIG.

The second print portion 10 b is a portion of FIG. 2 that does not overlap the first display 12 “A” of “E” that is the second display 13. This portion is a portion through which light from the color light source 3 passes, and is formed by the red print portion 102. The characteristic of the transmission efficiency with respect to the wavelength of the red printed portion 102 is the characteristic indicated by the line 21 in FIG.
The third print portion 10c is a portion where “A” in the first display 12 and “E” in the second display 13 overlap. This portion is formed by the light control printing portion 103. The characteristic of the transmission efficiency with respect to the wavelength of the light control printing portion 103 is the characteristic indicated by the line 25 in FIG.
The background print portion 10d is a display portion other than the first to third print portions 10a to 10c, and is black print. This portion absorbs light from the color light source 3 and the color light source 4.

Next, the operation will be described.
[Display effect]
(a) Non-display state In the state where neither the color light source 3 nor the color light source 4 is lit, the smoke lens 11 suppresses the brightness and ultraviolet rays of the incoming light from the outside and the reflected light, so the display structure is external. And the display is not visible (see FIG. 6).

(b) First Display FIG. 9 is an explanatory diagram showing a state of white conversion in the first embodiment.
In Example 1, to display the first display 12, the color light source 4 is turned on and the color light source 3 is turned off.
First, in the first printing portion 10a, blue light passes through the blue printing portion 101 and emits blue light as a display portion. In FIG. 5, the relationship between the line 24 and the line 23 is established.
Next, in the second print portion 10b, blue light cannot pass through the red print portion 102, and thus does not contribute to display. In FIG. 5, the relationship between the line 24 and the line 21 is established.
Next, in the third printing portion 10c, the blue light passes through the dimming printing portion 103, the luminance is adjusted, and light is emitted with substantially the same luminance as the first printing portion 10a. In FIG. 5, the relationship between the line 24 and the line 25 is established.
Further, since the blue light does not pass through the background print portion 10d, it does not contribute to the display.

Furthermore, the blue light that has passed through the first print portion 10 a and the blue light that has passed through the third print portion 10 c pass through the fluorescent filter 9 while displaying the first display 12.
Then, inside the fluorescent filter 9, when blue light hits the phosphor 91 included therein, it is excited and emits yellow light, and the light is directed to the outside of the display side (reference a in FIG. 9 changes to reference b). Further, inside the fluorescent filter 9, the blue light that did not fall on the phosphor 91 included therein passes through as it is as blue light and travels to the outside (passing through the symbol a in FIG. 9).

Therefore, the display light is a mixture of blue light and yellow light (see FIG. 9). Here, in the three primary colors of light (see FIG. 11), it is known how many colors will appear when each color is added, and Y (yellow) is obtained by adding G (green) and R (red). , Y (yellow) and B (blue) are added to W (white) and become white light.
In other words, since yellow (Y) is obtained by adding two of the three primary colors, green (G) and red (R), in this display color, the three primary colors green (G) and red ( R) and blue (B) are all added, and white light is displayed.
Thus, the first display 12, that is, “A” shown in FIG. 4A is displayed in white (see FIG. 7).

(c) Second Display In Example 1, to display the second display 13, the color light source 3 is turned on and the color light source 4 is turned off.
First, red light does not pass through the blue print portion 101 in the first print portion 10a. Therefore, it does not contribute to the display. In FIG. 5, the relationship between the line 22 and the line 23 is established.
Next, in the second print portion 10b, red light passes through the red print portion 102, so that it becomes a red display portion. In FIG. 5, the relationship between the line 22 and the line 21 is established.
In the third printing portion 10c, the red light passes through the dimming printing portion 103, the luminance is adjusted, and light is emitted with substantially the same luminance as the second printing portion 10b. In FIG. 5, the relationship between the line 22 and the line 25 is established.
Further, since the blue light does not pass through the background print portion 10d, it does not contribute to the display.

Further, the red light that has passed through the second print portion 10b and the third print portion 10c passes through the fluorescent filter 9 while displaying the second display 13 (see FIG. 10).
Then, inside the fluorescent filter 9, red light strikes the phosphor 91 included therein, but the phosphor 91 is not excited by the red light. Therefore, the light is not converted and passes through the red light, and the light is directed to the outside of the display side (symbol c before and after the phosphor in FIG. 10). In addition, the red light that does not fall within the phosphor 91 inside the fluorescent filter 9 passes as it is as red light and travels to the outside (symbol c not hitting the phosphor in FIG. 10).

The background print portion 10d does not allow red light to pass through.
As a result, the second display 13, that is, “E” shown in FIG. 4B is displayed in red (see FIG. 8).

[Switch action]
In the first embodiment, when the operator pushes the smoke lens 11, the integrated slider 8 slides, and a part 8 a of the slider 8 pushes the tact switch 5.
As the switch 1, a display circuit (not shown) provided on the substrate 6 determines in which display state an input is made to the tact switch 5, and is used as two operation inputs. Thereby, operation input in different modes can be performed with one switch.
Furthermore, when there is a change in the mode state in the operation input in the different mode, it can be displayed in color. Therefore, the operator can know the state of the mode without providing an indicator or the like.

[Action to display white color]
In Example 1, white display can be performed by the blue light and the yellow fluorescent filter 9. It can be said that the white display has the strongest contrast with the black background and is easy to see. It is possible to use a display that is very easy to see because two superimposed displays and white display can be performed.
Specifically, for example, in the display of a switch or the like in the vehicle interior of a vehicle, white display tends to increase in high-grade vehicle types, and it is advantageous that white display can be performed as in the first embodiment.

[About thickness of fluorescent filter]
Here, the further problem in the variable display structure of Example 1 is demonstrated.
In the first embodiment, as described above, the design that overlaps can be variably displayed using the fluorescent filter 9, and the display can be displayed in white.
In the variable display structure of Example 1, a certain amount of phosphor is required depending on the distance between the light source and the phosphor layer. In other words, since it is necessary for the entire printing surface, for example, when considering a configuration in which a blue LED and a yellow LED are lit to generate white light, a large amount of phosphor is required as compared with this. become. This is a problem in terms of cost.
Further, the red LED light used for red display has a problem that the light is absorbed by the fluorescent filter 9 and the display luminance is lowered.
The variable display structure of Embodiment 1 solves this problem.

[Action to reduce costs and improve red display brightness]
In the variable display structure of the first embodiment, the fluorescent filter 9 is made thin, and a yellow print portion 15 is provided on the front surface thereof.
By making the fluorescent filter 9 thin, the cost is greatly suppressed. This is very effective in the variable display structure of Example 1 in which the fluorescent filter 9 is provided on the entire display.

FIG. 12 is a graph of wavelength, transmittance, and relative luminous intensity that explains the white effect when the fluorescent filter 9 is sufficiently thick.
The wavelength characteristic when the blue LED is caused to emit light is as shown by a line 200 in FIG. When the fluorescent filter 9 is made sufficiently thick, a yellow component excited by the phosphor, that is, a red + green component appears as described above. This characteristic is as shown by a line 201 in FIG. It can be seen from FIG. 12 that white display is obtained by a peak having a high peak of the blue component and a peak having a low peak of the yellow component.

FIG. 13 is a graph of wavelength, transmittance, and relative luminous intensity for explaining the white effect when the fluorescent filter 9 is thinned as in the configuration of the first embodiment.
If the fluorescent filter 9 is thinned to reduce the cost, the excitation of the yellow component by the phosphor decreases, so that the blue color remains and sufficient white light cannot be obtained. In FIG. 13, the line 202 is obtained. It can be seen from FIG. 13 that the blue component has not changed much compared to the line 201 with sufficient thickness, but only a low percentage of the yellow component, i.e. the red + green component, has been obtained.

FIG. 14 is a graph of wavelength, transmittance, and relative luminous intensity for explaining the white effect in the case of the configuration of Example 1 in which the fluorescent filter 9 is thinned and the yellow printing portion 15 is provided on the front surface thereof.
In FIG. 14, the wavelength characteristic of the yellow printed portion 15 is as indicated by a line 204. That is, the transmittance decreases as it goes to a wavelength region lower than about 600 nm.
Therefore, the blue light is absorbed to some extent by the yellow printed portion 15. It can also be seen that yellow light due to excitation hardly receives absorption from the wavelength characteristic line 204 of the yellow printed portion 15.

As a result, the characteristics of the light passing through the fluorescent filter 9 and the yellow printed portion 15 when blue light is emitted are as shown by a line 203 in FIG. The characteristic of the line 203 is that the ratio of blue light and yellow light, that is, red + green light is closer to that suitable for white action than the line 202.
Therefore, although the overall luminance is slightly reduced, white light with sufficient quality can be obtained. Since the white display can obtain a very strong contrast with respect to black as the background, it is at a level that does not cause any problem in display performance. It is more advantageous to suppress the cost and obtain a sufficient white color.

FIG. 15 is a graph of wavelength, transmittance, and relative luminous intensity for explaining the red display effect in the case of the configuration of Example 1 in which the fluorescent filter 9 is thinned and the yellow printed portion 15 is provided on the front surface thereof.
The wavelength characteristic of red light is shown as a line 205 in FIG. The luminance of red light is absorbed and reduced by the phosphor of the fluorescent filter 9, but in Example 1, the amount of absorption can be kept low by reducing the thickness of the fluorescent filter 9.
This red light has a relationship between the line 204 and the line 205 in FIG. 15 in the yellow printed portion 15 and is hardly affected by the relationship. Therefore, the brightness of red display can be improved, and the display performance can be further improved.

  Next, the effect will be described. In the variable display structure of the first embodiment, the effects listed below can be obtained.

  (1) A variable display structure in which the light of the first light source and the light of the second light source having different wavelengths are switched and projected on the translucent sheet 10e to perform the first display 12 and the second display 13. The color light source 4 provided as the first light source, the blue printed portion 101 that is transmitted to the sheet 10e and transmits the wavelength of the color light source 4 and does not transmit the wavelength of the color light source 3, and the sheet 10e. A red print portion 102 that transmits the wavelength of the color light source 3 and does not transmit the wavelength of the color light source 4; a background print portion 10d that does not transmit the wavelengths of the color light source 3 and the wavelength of the color light source 4; 2 In the overlapping portion of the display 13, a light control printing portion 103 that transmits light while suppressing light from the color light source 3 and the color light source 4, and yellow light and blue light passing components that are output by excitation of the phosphor by blue light Fluorescent filter 9 that converts to white light by blue and blue To provide a yellow printing portion 15 to restrict the passage of light, it can be suppressed cost while can improve the display luminance of the red-based, white display can be performed, thereby improving the display performance.

  (2) The white conversion part is obtained by making the fluorescent filter 9 thinner than when the white color is converted only by the fluorescent filter 9, and adjusting the blue light component that is larger than the yellow light by making the fluorescent filter 9 thinner. Since the yellow printing portion 15 is provided, the fluorescent filter 9 is thinned to reduce the cost, and the blue component that is strengthened for this purpose is suppressed by the yellow printing portion 15 to obtain a good white display. Display performance can be improved.

[Other examples]
FIG. 16 is an explanatory view showing a display example in which the variable display structure of the embodiment is used for a vehicle meter. FIG. 17 is an explanatory view showing a display example in which the variable display structure of the embodiment is used for a push start switch.

In the example shown in FIG. 16, in the vehicle meter 70, when the color light source 4 is turned on, a white meter scale is displayed, and when the color light source 3 is turned on, a red meter scale is displayed. Each meter scale display has a different shape.
Then, since the vehicle meter 70 of a different color and a shape can be displayed, it changes with personal preference, for example. Further, for example, if the display is changed from the visibility according to the situation, the display becomes easier for the user to see.

In the example shown in FIG. 17, in the push start switch 80 that is an engine start switch, when the color light source 4 is lit, a white “START ENGINE” character display is displayed in the center of the switch, and when the color light source 3 is lit, The red “STOP ENGINE” character display is displayed large in the center of the switch.
Due to the variable display action, even if the positions of the characters overlap, it is possible to display the characters without making them smaller or changing the position to be difficult to see.

While the variable display structure of the present invention has been described with reference to Examples 1, The specific configuration is not limited to these embodiments, the gist of the invention according to 請 Motomeko of claims As long as they do not deviate, design changes and additions are permitted.
Printing on sheets such as the blue printing portion 101 and the red printing portion 102 includes silk printing, letterpress printing, ink jet printing, and thermal transfer printing, and any printing may be used. Also, other printing may be used.
The fluorescent filter and the additive color filter may be formed by printing, or may be formed in advance as a filter material.
When the additive color filter is provided, it is desirable that the layer structure be close to the fluorescent filter and not be separated.
The yellow print portion may be a yellow filter.

  The variable display structure of the present application can be easily used for parts that require easy-to-see display such as switches and instruments.

3 is a cross-sectional view illustrating a variable display structure of Example 1. FIG. 3 is a front view of a variable display structure filter according to Embodiment 1. FIG. It is AA sectional drawing of FIG. It is explanatory drawing which shows the 1st display of the variable display structure of Example 1, and a 2nd display. It is explanatory drawing which shows the relationship between the characteristic of the printing part of the variable display structure of Example 1, and the wavelength of each light source. It is explanatory drawing of the non-display state of the variable display structure of Example 1. FIG. It is explanatory drawing of the state which displayed the 1st display of the variable display structure of Example 1. FIG. It is explanatory drawing of the state which displayed the 2nd display of the variable display structure of Example 1. FIG. 6 is an explanatory diagram illustrating a state of white conversion in Embodiment 1. FIG. It is explanatory drawing which shows the state of the red light which passes the fluorescent film in Example 1. FIG. It is explanatory drawing of three primary colors of light. It is a graph of the wavelength, the transmittance | permeability, and relative luminous intensity explaining the white effect | action when a fluorescent filter is fully thickened. It is a graph of the wavelength, the transmittance | permeability, and relative luminous intensity explaining the white effect | action at the time of making a fluorescent filter thin like the structure of Example 1. FIG. It is a graph of the wavelength, the transmittance | permeability, and relative luminous intensity explaining the white effect | action in the case of the structure of Example 1 which made the fluorescent filter thin and provided the yellow printing part in the front surface. It is a graph of the wavelength, the transmittance | permeability, and relative luminous intensity explaining the red display effect | action in the case of the structure of Example 1 which made the fluorescent filter thin and provided the yellow printing part in the front surface. It is explanatory drawing which shows the example of a display which used the variable display structure of the Example for the vehicle meter. It is explanatory drawing which shows the example of a display which used the variable display structure of the Example for the push start switch.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Switch 2 Switch finisher 3 Color light source 4 Color light source 5 Tact switch 6 Board | substrate 7 Guide housing 8 Slider 8a Engagement part 9 Fluorescent filter 91 Phosphor 10 Color filter 10a 1st printing part 10b 2nd printing part 10c 3rd printing part 10d Background printing portion 10e Sheet 101 Blue printing portion 102 Red printing portion 103 Dimming printing portion 11 Smoke lens 12 First display 13 Second display 15 Yellow printing portion 70 Vehicle meter 80 Push start switch 200 (indicating blue LED characteristics) line 201 (showing characteristics of blue passing through + excited yellow) 202 (showing characteristics when the fluorescent filter is thinned) line 203 (showing characteristics obtained with fluorescent filter + yellow printing part) line 204 (yellow printing part The line 205 (red LED) Line showing the characteristics of

Claims (1)

Switch the light of the first light source and the light of the second light source with different wavelengths to the translucent sheet,
A variable display structure for performing a first display and a second display,
A blue light source provided as a first light source;
A first printed portion applied to the sheet that transmits the wavelength of the first light source and does not transmit the wavelength of the second light source;
A second printed portion applied to the sheet that transmits the wavelength of the second light source and does not transmit the wavelength of the first light source;
A background printing portion that does not transmit the wavelength of the first light source and the wavelength of the second light source;
A dimming print portion that suppresses and transmits light from the first light source and the second light source at an overlapping portion of the first display and the second display;
A phosphor layer that converts yellow light output by excitation of the phosphor with blue light and white light using a blue light passing component; a white conversion unit that includes a yellow print layer that restricts the passage of blue light; and
Equipped with a,
The white color conversion unit
The phosphor layer is thinner than the case where the phosphor layer is converted to white only,
The yellow printing layer is provided for adjusting the blue light component that is more than yellow light by thinning the phosphor layer.
A variable display structure characterized by that.