JP2008256995A - Variable display structure - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a variable display structure having few printing failures and can reduce light leakage from absorption layer. <P>SOLUTION: The variable display structure has a first print part 10b which transmits the wavelength of a color light source 2; a second print part 10c which transmits the wavelength of a color light source 3; a third print part 10d which suppresses and transmits light beams of the color light source 2 and color light source 3, at a part superimposed with a part where first display and second display overlap with each other; and a background print part 10e, which does not transmit the wavelength of the color light source 2 and the wavelength of the color light source 3, and is provided with filters 4 and 5, which make narrow the light emission wavelength range of at least one of the color light source 2 and color light source 3. <P>COPYRIGHT: (C)2009,JPO&INPIT

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, in a variable display structure having a plurality of light sources and a color filter that transmits and absorbs light from each light source, an absorption portion that does not transmit light from the light source suppresses light leakage from the absorption portion. The filter layer portion is printed so as to overlap a plurality of times (for example, see Patent Document 1).
Japanese Patent Laying-Open No. 2005-257938 (page 2-10, full view)

  However, in the prior art, there has been a problem that a printing failure has occurred due to multiple times of repeated printing. In addition, the multiple overprinting has been a problem in terms of cost.

  The present invention has been made paying attention to the above-mentioned problems, and an object of the present invention is to provide a variable display structure in which there are few printing defects and light leakage from the absorption layer can be reduced.

  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. The display structure includes a first printed portion that transmits the wavelength of the first light source, a second printed portion that transmits the wavelength of the second light source, and a third that does not transmit the wavelengths of the first light source and the second light source. A dimming printing unit that suppresses and transmits light from the first light source and the second light source at a portion that overlaps the overlapping portion of the first display and the second display, and the first light source. And a light source filter for narrowing a light emission wavelength region of at least one of the second light sources.

  Therefore, in the present invention, light leakage from the absorption layer can be reduced while reducing printing defects.

  Hereinafter, an embodiment for realizing a variable display structure according to claims 1 and 2 of the present invention will be described based on Example 1. FIG.

First, the configuration will be described.
FIG. 1 is a front view of the variable display structure of the first embodiment. 2 is a cross-sectional view taken along the line AA in FIG. FIG. 3 is an explanatory diagram showing a first display and a second display of the variable display structure of the first embodiment.

As shown in FIG. 2, the variable display structure of the first embodiment includes a color filter 10, a color light source 2 and a color light source 3 provided on the back side of the display unit 1 such as a switch.
The color light source 2 is a light source that emits blue light with a wavelength peaking at about 530 nm, and the color light source 3 is a light source that emits red light with a wavelength peak at about 640 nm.
The color light source 2 and the color light source 3 are preferably LEDs in terms of cost reduction and maintainability, but may be different. The color light sources 2 and 3 may be other colors.
FIG. 4 is an explanatory diagram illustrating the light source emission wavelength characteristics of Example 1. FIG.
In FIG. 4, the characteristic of the color light source 2 is indicated by a line 200, and the characteristic of the color light source 3 is indicated by a line 300.

The color light sources 2 and 3 are respectively provided with housings 21 and 31 covering the periphery, respectively, and filters 4 and 5 are provided thereon, respectively.
As a result, the light emitted from the color light sources 2 and 3 is transmitted through the filters 4 and 5 and irradiated to the color filter 10.

As shown in FIGS. 1 and 2, the color filter 10 includes a first printed portion 10b, a second printed portion 10c, a third printed portion 10d, and a background printed portion 10e on the front surface of a transparent sheet 10a.
Here, it is assumed that the first display 12 is “◯” of the graphic as shown in FIG. 3A, and the second display 13 is “X” of the graphic as shown in FIG. 3B.
The first print portion 10 b is the portion of FIG. 1 that does not overlap with the second display 13 “X” of “◯” that is the first display 12. This portion is a blue printing portion that allows the blue light of the color light source 2 to pass therethrough.

FIG. 5 is an explanatory diagram showing the light absorption characteristics of the printed layer. In FIG. 5, the horizontal axis indicates the wavelength corresponding to FIG. 4, and the vertical axis indicates the transmittance of light of that wavelength. That is, the higher the light is, the more light is transmitted.
The transmittance characteristic with respect to the wavelength of the blue printed portion is the characteristic indicated by the line 101 in FIG.

  The second print portion 10 c is the portion of FIG. 1 that does not overlap with the first display 12 “◯” of “x” that is the second display 13. This portion is a portion through which the red light of the color light source 3 passes, and is formed by a red printing portion. The transmittance characteristic with respect to the wavelength of the red printed portion is the characteristic indicated by the line 102 in FIG.

The third print portion 10d is a portion where “◯” in the first display 12 and “x” in the second display 13 overlap. This portion is formed by a light control printing portion. The transmittance characteristic with respect to the wavelength of the light control printing portion is a characteristic indicated by a line 103 in FIG.
That is, it is a printed part that allows blue light and red light to pass through appropriately.

  The background print portion 10e is a display portion other than the first to third print portions 10b to 10d, and is black print. This portion absorbs light from the color light source 2 and the color light source 3. This is the characteristic indicated by the line 104 in FIG.

Next, the operation will be described.
[Display effect]
(a) Non-display state When neither the color light source 2 nor the color light source 3 is lit, nothing is displayed because the light from either light source does not pass through the color filter 10.

(b) First Display In Example 1, to display the first display 12, the color light source 2 is turned on and the color light source 3 is turned off.
First, in the first print portion 10b, blue light passes through the blue print portion and emits blue light as a display portion. The relationship between the line 200 in FIG. 4 and the line 101 in FIG. 5 is established.
Next, in the second print portion 10c, blue light cannot pass through the red print portion and thus does not contribute to the display. The relationship between the line 200 in FIG. 4 and the line 102 in FIG. 5 is established.

Next, in the third printing portion 10d, the blue light passes through the light control printing portion, and the color and brightness are adjusted. The relationship between the line 200 in FIG. 4 and the line 103 in FIG. 5 is established.
Further, since the blue light does not pass through the background print portion 10e, it does not contribute to the display. As a display, a black background is formed, and the first display 12 “◯” is made to appear to rise.
Thereby, the first display 12, that is, “◯” shown in FIG. 3A is displayed in blue.

(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 2 is turned off.
First, in the first print portion 10b, red light does not pass through the blue print portion. Therefore, it does not contribute to the display. The relationship between the line 300 in FIG. 4 and the line 101 in FIG. 5 is established.
Next, in the second printing portion 10c, red light passes through the red printing portion, so that it becomes a red display portion. The relationship between the line 300 in FIG. 4 and the line 102 in FIG. 5 is established.

In the third printing portion 10d, the red light passes through the dimming printing portion, and the color and brightness are adjusted. The relationship between the line 300 in FIG. 4 and the line 103 in FIG. 5 is established.
Further, since the red light does not pass through the background print portion 10e, it does not contribute to the display. As a display, a black background is formed, and the second display 13 “X” is made to appear to be raised.
As a result, the second display 13, that is, “X” shown in FIG. 3B is displayed in red.

[About overprinting]
For example, the light sources 2 and 3 similar to those of the first embodiment described above have the characteristics shown in FIG. 4 and have the same printing portions as those of the first embodiment shown in FIG. The conventional structure has a structure in which the light sources 2 and 3 are not provided with the filters 4 and 5 but directly irradiate the color filter 10 with light.

6 and 7 are explanatory views of light emission, transmission and absorption in a conventional variable display structure.
In this conventional configuration, when the characteristics shown in FIG. 4 and FIG. 5 are combined, there is a portion that slightly transmits on the non-transmitting side due to the characteristics.
That is, the light absorption insufficient region 400 occurs in the blue light emitting portion shown in FIG. 6, and the light absorption insufficient region 400 occurs in the red light emission portion shown in FIG.
When such a light absorption insufficient region 400 occurs, there arises a problem that unnecessary lines and the like are visible.

Therefore, both print portions, that is, the first print portion 10b and the second print portion 10c are overprinted.
8 and 9 are explanatory diagrams of light emission, transmission, and absorption during overprinting in the variable display structure. FIG. 10 is a cross-sectional view of overprinting in the variable display structure.
As described above, the light emission and absorption characteristics shown in FIGS. 6 and 7 are suppressed in transmission on the light emission side and more absorbed on the absorption side, and the characteristics shown in FIGS. 8 and 9 (lines 200c, 200d, 300c and 300d), the light absorption insufficient region 400 is not generated.

However, if the printing layer is overprinted a plurality of times, a cross-sectional structure as shown in FIG. 10 is formed and a step is formed, so that defects are likely to occur during print transfer.
This is because peeling or tearing easily occurs due to the step.
In addition, since it is necessary to perform printing so that the layer to be overlapped matches the previous layer, there is a problem in that a printing position shift occurs. When such a problem occurs, an unnecessary line can be seen when displayed, which is a problem.

Further, in the overprinting, the brightness of the entire display is lowered.
Further, if it is attempted to deal with ink blending or the like without performing overprinting, it becomes special and the cost becomes very high, which is difficult in reality.
The variable display structure of Embodiment 1 solves these problems.

[Action to narrow emission wavelength range]
In the first embodiment, as shown in FIG. 2, filters 4 and 5 are provided on the respective color light sources 2 and 3.
FIG. 11 is an explanatory diagram showing light transmission / absorption characteristics of the variable display structure filter of the first embodiment. FIG. 12 is an explanatory diagram showing the emission wavelength characteristics when the variable display structure filter of Example 1 is mounted. 13 and 14 are explanatory diagrams illustrating the state of transmitted light emission in the printing unit in the variable display structure according to the first embodiment.

  In the first embodiment, as shown in FIG. 11, the filters 4 and 5 have characteristics that narrow the wavelength range of light emitted from the color light sources 2 and 3 so as to reduce the wavelength range on the intermediate side of both light sources. The light emitted from the respective color light sources 2 and 3 passes through the filters 4 and 5, so that the light emission characteristics of the light sources become narrow in wavelength. The characteristics of light emission through the filters 4 and 5 are shown in FIG. The characteristic is as if the middle side of each color light source 2 and 3 is cut. (Characteristic lines 500, 600, 200e, and 300e in FIGS. 11 and 12)

When the color filter 10 passes the light passing through the filters 4 and 5 in this way, the light emission characteristics thereof are as shown in FIGS. 13 and 14, and even if the overprinting is reduced more than the conventional multiple times described above, the light is emitted. There is no underabsorption area. (Characteristic lines 200f, 300f, 200g, 300g in FIGS. 13 and 14)
This is a cause of the light absorption insufficiency region. In the wavelength region of the print portion on the intermediate side of the two-color light source that slightly transmits light on the print layer side, the filter 4 is shaped so as to cut the characteristics on the light emission side in that portion. , 5 narrows the wavelength characteristic.
The ability to reduce the number of overprints from the conventional multiple times described above reduces printing defects and costs.

  Moreover, since the overall brightness is not suppressed as compared with the conventional technique in which overprinting is performed a plurality of times, the brightness is slightly lower than that of the light source itself, but a higher brightness can be obtained.

  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 color light source 2 and the light of the color light source 3 having different wavelengths are switched and projected on the translucent sheet 10a to perform the first display 12 and the second display 13. The first printed portion 10b that transmits the wavelength of the color light source 2, the second printed portion 10c that transmits the wavelength of the color light source 3, and the portion that overlaps the overlapping portion of the first display and the second display, A third print portion 10d that suppresses and transmits light from the light source 2 and the color light source 3; and a background print portion 10e that does not transmit the wavelength of the color light source 2 and the wavelength of the color light source 3. The color light source 2 and the color light source Since the filters 4 and 5 that narrow the emission wavelength region of at least one light source 3 are provided, light leakage from the absorption layer can be reduced while reducing printing defects.

  (2) Since the filters 4 and 5 suppress the transmission of the light emission wavelength region on the intermediate wavelength side of the color light source 2 and the color light source 3, the wavelength characteristic of the printed portion is a region where the light absorption property is insufficient. In this case, by suppressing the area on the light source side, it is possible to prevent generation of an area where light absorption is insufficient and to prevent a light source from causing a line due to light leakage. The number of times can be reduced and printing defects can be eliminated, thereby providing a higher quality display.

(Other configuration examples)
FIG. 15 shows another example of the filters 4 and 5 in the variable display structure of the first embodiment.
In the variable display structure shown in FIG. 15, the filters 4 and 5 have cap shapes that are attached so as to cover the light emitting portions of the color light sources 2 and 3.
As described above, the filters 4 and 5 may be any filter provided between the light emitting portion of the color light source and the color filter 10, and may have a cap shape as described above.

As described above, the variable display structure of the present invention has been described based on the first embodiment. However, the specific configuration is not limited to these embodiments, and the gist of the invention according to each claim of the claims. As long as they do not deviate, design changes and additions are permitted.
The colors of the first display and the second display may be other colors.
Printing on the sheet of each printing portion 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 variable display structure of the present application can be easily used for parts that require simple display such as switches.

3 is a front view of a variable display structure of Example 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. FIG. 6 is an explanatory diagram showing light source emission wavelength characteristics of Example 1. It is explanatory drawing which shows the light absorption characteristic of a printing layer. It is explanatory drawing of light emission in the conventional variable display structure, permeation | transmission, and absorption. It is explanatory drawing of light emission in the conventional variable display structure, permeation | transmission, and absorption. It is explanatory drawing of light emission at the time of overlap printing in a variable display structure, permeation | transmission, and absorption. It is explanatory drawing of light emission at the time of overlap printing in a variable display structure, permeation | transmission, and absorption. It is sectional drawing of the overprinting in a variable display structure. FIG. 6 is an explanatory diagram illustrating light transmission / absorption characteristics of a filter having a variable display structure according to Example 1; It is explanatory drawing which shows the light emission wavelength characteristic at the time of mounting | wearing with the filter of the variable display structure of Example 1. FIG. 6 is an explanatory diagram illustrating a state of transmitted light emission in a printing unit in the variable display structure of Example 1. FIG. 6 is an explanatory diagram illustrating a state of transmitted light emission in a printing unit in the variable display structure of Example 1. FIG. 6 is another example of the filter in the variable display structure of the first embodiment.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Display part 2 Color light source 21 Housing 3 Color light source 31 Housing 4 Filter 5 Filter 10 Color filter 10a Sheet 10b 1st printing part 10c 2nd printing part 10d 3rd printing part 10e Background printing part 12 1st display 13 2nd display

Claims (2)

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 first printed portion that transmits the wavelength of the first light source;
A second printed portion that transmits the wavelength of the second light source;
A third printing unit that suppresses and transmits light from the first light source and the second light source in a portion that overlaps an overlapping portion of the first display and the second display;
A fourth printed portion that does not transmit the wavelength of the first light source and the wavelength of the second light source;
With
A light source filter for narrowing an emission wavelength region of at least one of the first light source and the second light source;
A variable display structure characterized by that. The variable display structure according to claim 1,
The light source filter is:
The transmission of the emission wavelength region is suppressed on the intermediate wavelength side of the first light source and the second light source.
A variable display structure characterized by that.

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