KR20100134382A - Multiple light-guide film and conversional multiple keypad having the same - Google Patents

Abstract

PURPOSE: In the multiple waveguide film and conversion type multiple keypad including the same is waveguide film, the luminance of the light guided to the top can be improved. CONSTITUTION: The first waveguide the film(120) comprises the first plate side pattern. The film(140) locates to the second waveguide to the first waveguide in the lower part of film. The second plate side pattern and the second side pattern are included. The sacrificial layer is formed on the upper side.

Description

MULTIPLE LIGHT-GUIDE FILM AND CONVERSIONAL MULTIPLE KEYPAD HAVING THE SAME}

The present invention relates to a keypad, and more particularly, to a multiple waveguide film and a convertible multiple keypad including the plurality of patterns to be displayed on one keypad.

With the recent development of technology, electronic devices have been miniaturized, while the functions of electronic devices have been gradually expanded. Therefore, although the space for the keypad included in the electronic device is limited, patterns such as letters, symbols, and numbers that must be input through the keypad are continuously increasing, and design is an important factor in selecting electronic devices. Consideration has been made in various attempts to enhance the appearance of the keypad.

Thus, a method of simultaneously displaying patterns such as letters, symbols, numbers, and the like on a button on a keypad has been proposed, but there is a problem in that the size of each pattern displayed on the button on the keypad is reduced. In addition, in order to enhance the appearance of the keypad, a method of emitting patterns not only on the plate surface of the keypad but also on the side surface has been proposed. There is a problem that can not be slim.

An object of the present invention can block the light interference between the waveguide film, improve the brightness of the light (guide) to the upper guide (guide) from the waveguide film located at the bottom, provided on the plate surface and side of the multiple waveguide film To provide a multi-waveguide film of a slim form that can selectively emit a variety of patterns simultaneously.

Another object of the present invention is to increase the number of patterns displayed on one keypad by including the multi-waveguide film, it is possible to display a variety of patterns with improved brightness of the light, and to select a variety of patterns simultaneously on the plate surface and side It is to provide a conversion type multiple keypad that can emit light.

However, the problem to be solved by the present invention is not limited to the above-mentioned technical problem, and other technical problems not mentioned above may be clearly understood by those skilled in the art without departing from the spirit and scope of the present invention. There will be.

In order to achieve the above object of the present invention, a multi-waveguide film according to an embodiment of the present invention is a first waveguide film having a first plate pattern and a second plate pattern and positioned below the first waveguide film and It may include a second waveguide film having a second side pattern and an auxiliary layer formed on the upper surface.

According to an embodiment of the multiple waveguide film, the first waveguide film may further include a first side pattern.

According to an embodiment of the multiple waveguide film, the first plate pattern and the first side pattern may be a pattern having a first color, and the second plate pattern and the second side pattern may be a pattern having a second color. have.

According to an embodiment of the multi-waveguide film, the first plate pattern is a pattern having a first color, the first side pattern is a pattern having a second color, the second plate pattern is a pattern having a third color The second side pattern may be a pattern having a fourth color.

According to an embodiment of the multiple waveguide film, the auxiliary layer may block light interference between the first waveguide film and the second waveguide film and may improve the brightness of light guided upward from the second waveguide film. .

According to an embodiment of the multiple waveguide film, the auxiliary layer may be formed by printing a transparent ink on the second waveguide film.

According to an embodiment of the multiple waveguide film, the transparent ink may be a light reflecting ink having a light reflecting effect or a light diffusing ink having a light diffusing effect.

According to an embodiment of the multiple waveguide film, each of the first and second waveguide films may be independently irradiated with light by different light sources.

In order to achieve the above object of the present invention, the multi-waveguide film according to another embodiment of the present invention is a first waveguide film having a first plate pattern, a second plate pattern and positioned below the first waveguide film and A second waveguide film having a second side pattern and having a first auxiliary layer formed on an upper surface thereof, a second waveguide film positioned below the second waveguide film and having a third plate pattern and a third side pattern formed thereon and having a second auxiliary layer formed on an upper surface thereof; 3 may comprise a waveguide film.

According to an embodiment of the multiple waveguide film, the first waveguide film may further include a first side pattern.

According to an embodiment of the multi-waveguide film, the first plate pattern and the first side pattern is a pattern having a first color, the second plate pattern and the second side pattern is a pattern having a second color, The third plate pattern and the third side pattern may be patterns having a third color.

According to an embodiment of the multi-waveguide film, the first plate pattern is a pattern having a first color, the first side pattern is a pattern having a second color, the second plate pattern is a pattern having a third color The second side pattern may be a pattern having a fourth color, the third plate pattern may be a pattern having a fifth color, and the third side pattern may be a pattern having a sixth color.

According to an embodiment of the multiple waveguide film, the first auxiliary layer blocks light interference between the first waveguide film and the second waveguide film and improves the brightness of light guided upward from the second waveguide film. The second auxiliary layer may block light interference between the second waveguide film and the third waveguide film and improve brightness of light guided upward from the third waveguide film.

In example embodiments, the first auxiliary layer is formed by printing a first transparent ink on the second waveguide film, and the second auxiliary layer is printed on the third waveguide film by a second transparent ink. It can be formed by.

According to an embodiment of the multi-waveguide film, the first and second transparent ink may be a light reflecting ink having an effect of reflecting light or a light diffusing ink having an effect of diffusing light.

According to an embodiment of the multiple waveguide film, each of the first to third waveguide films may be independently irradiated with light by different light sources.

In order to achieve the above-described other object of the present invention, the conversion type multiple keypad according to an embodiment of the present invention includes a pad having a plurality of buttons, a light wave on the multi-waveguide film and the multi-waveguide film positioned under the pad. It may include a plurality of light sources for irradiating the. In addition, the multi-waveguide film is a first waveguide film having a first plate pattern and a second waveguide film having a second layer pattern and a second side pattern and is disposed on the lower side of the first waveguide film, the auxiliary layer is formed on the upper surface It may include.

According to an embodiment of the conversion type multiple keypad, the first waveguide film may further include a first side pattern.

According to an embodiment of the conversion multiple keypad, the conversion multiple keypad may further include a design layer positioned between the pad and the multiple waveguide film to generate a three-dimensional effect.

According to an embodiment of the conversion type multiple keypad, when the external pressure is applied to the pad, the conversion type keypad may perform keypad operation in such a manner that the external pressure is transmitted to a circuit board including a dome switch.

According to an embodiment of the conversion type multiple keypad, when the touch signal is applied to the pad, the pad or the multi-waveguide film may perform a keypad operation by detecting the touch signal.

According to the embodiment of the conversion type multiple keypad, the conversion type multiple keypad may further include a touch sheet for detecting the touch signal when a touch signal is applied to the pad, the touch sheet for detecting the touch signal The keypad operation can be performed in a manner.

In order to achieve the above-described other object of the present invention, a convertible multiple keypad according to another embodiment of the present invention includes a pad having a plurality of buttons, a multi waveguide film positioned below the pad, and a light on the multi waveguide film. It may include a plurality of light sources for irradiating the. The multi-waveguide film may further include a first waveguide film having a first plate pattern, a second plate pattern disposed below the first waveguide film, a second plate pattern and a second side pattern, and a second auxiliary layer formed on an upper surface thereof. The waveguide film may include a third waveguide film disposed under the second waveguide film, the third waveguide film having a third plate pattern and a third side pattern, and having a second auxiliary layer formed on an upper surface thereof.

According to an embodiment of the conversion type multiple keypad, the first waveguide film may further include a first side pattern.

According to an embodiment of the conversion multiple keypad, the conversion multiple keypad may further include a design layer positioned between the pad and the multiple waveguide film to generate a three-dimensional effect.

According to an embodiment of the conversion type multiple keypad, when the external pressure is applied to the pad, the conversion type keypad may perform keypad operation in such a manner that the external pressure is transmitted to a circuit board including a dome switch.

According to an embodiment of the conversion type multiple keypad, when the touch signal is applied to the pad, the pad or the multi-waveguide film may perform a keypad operation by detecting the touch signal.

According to the embodiment of the conversion type multiple keypad, the conversion type multiple keypad may further include a touch sheet for detecting the touch signal when a touch signal is applied to the pad, the touch sheet for detecting the touch signal The keypad operation can be performed in a manner.

The multi-waveguide film according to embodiments of the present invention can block the light interference between the waveguide films, improve the brightness of the light guided to the upper portion in the waveguide film located at the bottom, and without additional configuration Various patterns provided on the plate surface and the side of the waveguide film may be selectively emitted at the same time.

Convertible multiple keypad according to embodiments of the present invention can increase the number of patterns displayed on one keypad by including the multiple waveguide film, can display a variety of patterns with improved brightness of the light, various patterns Not only selectively emit light from the plate surface and side at the same time, but also can be manufactured in a slim and simple form.

However, the effects of the present invention are not limited to the above-mentioned effects, and other effects not mentioned above may be clearly understood by those skilled in the art without departing from the spirit and scope of the present invention. For example, the multi-waveguide film and the convertible multi-keypad including the same according to embodiments of the present invention can provide a beautiful appearance, increase the visibility of keypad operation, and also have a slim and simple form. It can be manufactured and can be advantageous in terms of time and cost in the manufacturing process.

With respect to the embodiments of the present invention disclosed in the text, specific structural to functional descriptions are merely illustrated for the purpose of describing embodiments of the present invention, embodiments of the present invention may be implemented in various forms and It should not be construed as limited to the embodiments described in.

As the inventive concept allows for various changes and numerous embodiments, particular embodiments will be illustrated in the drawings and described in detail in the text. However, this is not intended to limit the present invention to the specific disclosed form, it should be understood to include all modifications, equivalents, and substitutes included in the spirit and scope of the present invention. Similar reference numerals are used for the components in describing the drawings.

Terms such as first and second may be used to describe various components, but the components are not limited by these terms. The terms are used only for the purpose of distinguishing one component from another. For example, without departing from the scope of the present invention, the first component may be referred to as the second component, and similarly, the second component may also be referred to as the first component.

When a component is said to be "connected" or "connected" to another component, it may be directly connected to or connected to that other component, but it may be understood that another component may be present in the middle. Should be. On the other hand, when a component is said to be "directly connected" or "directly connected" to another component, it may be understood that there is no other component in between. Other expressions describing the relationship between the components may be interpreted as well, such as "between" and "immediately between" or "neighboring to" and "directly neighboring".

The terminology used herein is for the purpose of describing particular example embodiments only and is not intended to be limiting of the present invention. Singular expressions include plural expressions unless the context clearly indicates otherwise. In this application, the terms "comprise" or "having" are intended to indicate that there is a feature, number, step, action, component, part, or combination thereof that is described, and that one or more other features or numbers are present. It will be understood that it does not exclude in advance the possibility of the presence or the addition of steps, actions, components, parts or combinations thereof.

Unless defined otherwise, all terms used herein, including technical or scientific terms, have the same meaning as commonly understood by one of ordinary skill in the art. Terms such as those defined in the commonly used dictionaries should be construed as having meanings consistent with the meanings in the context of the related art and shall not be construed in ideal or excessively formal meanings unless expressly defined in this application. Do not.

Hereinafter, with reference to the accompanying drawings, it will be described in detail a preferred embodiment of the present invention. The same reference numerals are used for the same constituent elements in the drawings and redundant explanations for the same constituent elements are omitted.

1 is a cross-sectional view illustrating a multiple waveguide film according to an embodiment of the present invention, and FIG. 2 is a plan view illustrating the multiple waveguide film of FIG. 1.

1 to 2, the multi-waveguide film 100 may include a first waveguide film 120 and a second waveguide film 140, and an auxiliary layer (not shown) on the top surface of the second waveguide film 140. 145 may be formed. Here, the expression film is interpreted as a plate, a sheet, or the like capable of guiding light, and thus the technical idea of the present invention should not be limited to the film.

The first waveguide film 120 may be positioned on the second waveguide film 140 and may include a first plate pattern 120a and a first side pattern 120b. However, according to an embodiment, the first waveguide film 120 may include only the first plate pattern 120a. As the first waveguide film 120, a substrate such as PC, PE, PET, PMMA, or PU may be used. The first plate surface pattern 120a may be printed on a plate surface of the first waveguide film 120 by a print method, a laser method, a hot press method, a CNC method, an etching method, or the like. The first side pattern 120b may be formed on a side surface of the first waveguide film 120 by a CNC method, an etching method, a laser method, or the like. The first side pattern 120b may be formed only on a side surface of the first waveguide film 120 where light of the first side pattern 120b is required. For example, FIG. 2 shows that the first side surface pattern 120b is not formed on the first side surface A of the first waveguide film 120.

The second waveguide film 140 may be positioned below the first waveguide film 120 and may include a second plate pattern 140a and a second side pattern 140b. Like the first waveguide film 120, a substrate such as PC, PE, PET, PMMA, or PU may be used as the second waveguide film 140. The second plate pattern 140a may be formed on the plate surface of the second waveguide film 140 by a printing method, a laser method, a hot press method, a CNC method, an etching method, and the like. On the side of the two waveguide film 140 may be formed by a CNC method, an etching method, a laser method and the like. The second side pattern 140b may be formed only on a side surface of the second waveguide film 140 where light emission of the second side pattern 140b is required. For example, FIG. 2 shows that the second side pattern 140b is not formed on the first side A of the second waveguide film 140.

Each of the first waveguide film 120 and the second waveguide film 140 may be independently irradiated with light from different light sources. That is, the first waveguide film 120 may receive light from a light source located on the side of the first waveguide film 120, and the second waveguide film 140 may be a light source located on the side of the second waveguide film 140. The light can be irradiated from. In this case, the light source may be a light emitting diode (LED), but is not limited thereto. In some embodiments, a through hole is formed in the first waveguide film 120 or the second waveguide film 140, and the light source in which the first waveguide film 120 or the second waveguide film 140 is located on an inner side surface of the through hole is formed. You can also receive light from each.

Light irradiated to the first waveguide film 120 is emitted to the outside from the first plate pattern 120a and the first side pattern 120b through the inside of the first waveguide film 120, and the second waveguide film 140. ) Is emitted to the outside from the second plate pattern 140a and the second side pattern 140b through the inside of the second waveguide film 140. That is, the first plate pattern 120a and the first side pattern 120b may emit light simultaneously from the plate surface and the side surface of the first waveguide film 120, and the second plate pattern 140a and the second side pattern 140b may emit light. ) May emit light simultaneously on the plate surface and the side surface of the second waveguide film 140. As such, the multi-waveguide film 100 may selectively emit the first plate pattern 120a and the first side pattern 120b or the second plate pattern 140a and the second side pattern 140b at the same time.

Although not shown in FIGS. 1 and 2, the first waveguide film 120 may include a first refraction portion for refracting light traveling to the first plate pattern 120a and the first side pattern 120b, The second waveguide film 140 may also include a second refracting portion for refracting light traveling to the second plate pattern 140a and the second side pattern 140b. The first refraction portion is formed around the first plate pattern 120a and the first side pattern 120b to refract light directed toward the first plate pattern 120a and the first side pattern 120b to adjust the amount of light. The second refraction portion may also be formed around the second plate pattern 140a and the second side pattern 140b to refract light directed toward the second plate pattern 140a and the second side pattern 140b to adjust the amount of light.

The patterns formed on the first waveguide film 120 and the second waveguide film 140 may be color patterns to produce various atmospheres through light emission of the patterns in the multi-waveguide film 100. That is, the first plate pattern 120a and the first side pattern 120b are formed in the first color (for example, red color), and the second plate pattern 140a and the second side pattern 140b are the second color. It may be formed in color (eg green). In addition, the first plate pattern 120a is formed of a first color (eg, red), the first side pattern 120b is formed of a second color (eg, green), and the second plate pattern 140a may be formed of a third color (eg, blue), and the second side pattern 140b may be formed of a fourth color (eg, yellow). For example, the first plate pattern 120a is a letter-shaped pattern, the second plate pattern 140b is a figure-shaped pattern, and the first side pattern 120b and the second side pattern 120b are strip-shaped. Assuming a pattern of, it is possible to provide a different atmosphere of lighting according to each pattern can make the user feel aesthetic. However, this is only one example, and the combination of colors may be variously changed according to a required condition.

An auxiliary layer 145 may be formed on an upper surface of the second waveguide film 140. The auxiliary layer 145 blocks light interference between the first waveguide film 120 and the second waveguide film 140, and improves the brightness of light that is irradiated to the second waveguide film 140 and proceeds upward. In order to increase, the transparent ink may be formed on the upper surface of the second waveguide film 140. At this time, the transparent ink is a reflection ink having the effect of reflecting light by the addition of reflective beads or pearl particles, or a light diffusion ink having the effect of diffusing light. Can be. Therefore, an auxiliary layer 145 having a light reflection effect or a light diffusion effect is positioned between the first waveguide film 120 and the second waveguide film 140 so that the first waveguide film 120 and the second waveguide film ( Light interference between the 140 may be blocked to solve a problem such as a moire phenomenon.

In addition, when light is irradiated to the second waveguide film 140 from the light source, since the irradiated light travels upward through the auxiliary layer 145, the light is reflected or diffused from the auxiliary layer 145 and upwards. You can proceed. As a result, the brightness of light emitted from the light source to the second waveguide film 140 and traveling upward may be greatly improved. Therefore, the luminance of the light which is irradiated to the first and second waveguide films 120 and 140 and proceeds upward may be substantially the same. As such, the multi-waveguide film 100 forms an auxiliary layer 145 having a light reflection effect or a light diffusion effect on the second waveguide film 140, thereby forming the first waveguide film 120 and the second waveguide. The light interference between the film 140 can be more effectively blocked, and the light which is irradiated to the second waveguide film 140 from the light source and proceeds to the outside is provided with the auxiliary layer 145 having the light reflection effect or the light diffusion effect. By passing through it, the brightness of light can be greatly improved.

As described above, the multi-waveguide film 100 may selectively emit the first plate pattern 120a and the first side pattern 120b or the second plate pattern 140a and the second side pattern 140b at the same time. In addition, while blocking light interference between the first waveguide film 120 and the second waveguide film 140, the luminance of light traveling upward from the second waveguide film 140 may be greatly improved. In addition, the multi-waveguide film 100 is a separate additional for selectively emitting the first plate pattern 120a and the first side pattern 120b or the second plate pattern 140a and the second side pattern 140b at the same time. Since it does not require a configuration and does not require a separate additional configuration for blocking light interference between the first waveguide film 120 and the second waveguide film 140 and improving the brightness of the light, it may be manufactured in a slim form. Can be manufactured in a simplified process, and can greatly reduce manufacturing time and manufacturing costs.

However, since the configuration and description of the multiple waveguide film 100 shown in Figs. 1 to 2 are exemplary, the technical idea of the present invention is the configuration and configuration of the multiple waveguide film 100 shown in Figs. It should not be limited only to the description thereof. For example, in the above, it has been described that the auxiliary layer 145 is formed in such a manner that a transparent ink is printed on the upper surface of the second waveguide film 140, but this is one example. 2 may be formed in various ways such as a transparent ink is coated on the upper surface of the waveguide film 140. In addition, an adhesive or a double-sided tape for bonding the first waveguide film 120 and the second waveguide film 140 to each other may be located in an edge region of the first waveguide film 120 and the second waveguide film 140. In order to prevent the light emitted from the first side pattern 120b and the second side pattern 140b from affecting each other, a light shielding tape or the like is disposed between the first side pattern 120b and the second side pattern 140b. Can be located.

3 is a cross-sectional view illustrating a convertible multiple keypad according to an embodiment of the present invention, and FIG. 4 is a perspective view illustrating the convertible multiple keypad of FIG. 3.

3 to 4, the multiple conversion keypad 240 may include a pad 242 having a plurality of buttons and a multiple waveguide film 100 positioned below the pad 242. The waveguide film 100 may include a first waveguide film 120 and a second waveguide film 140, and an auxiliary layer 145 may be formed on an upper surface of the second waveguide film 140. However, the circuit board for controlling the operation of the conversion-type multiple keypad 240 and the light sources for irradiating light to the multi-waveguide film 100 correspond to the general one, and thus are not illustrated.

When the conversion type multiple keypad 240 is applied with an external pressure to the pad 242, the external pressure is transmitted to the dome switch of the circuit board positioned below the multiple waveguide film 100 via the multiple waveguide film 100. It can work. In addition, when the touch signal is applied to the pad 242, the conversion type multiple keypad 240 may operate in a manner in which the pad 242 or the multi-waveguide film 100 detects the touch signal. Furthermore, the conversion type multiple keypad 240 may further include a touch sheet that detects a touch signal when a touch signal is applied to the pad 242, so that the touch sheet may also operate in a manner of detecting a touch signal on the pad 242. have. As such, the operation of the convertible multiple keypad 240 may be performed in various ways, and is not limited to the above-described method. However, since the operation method of the keypad itself is general, detailed description thereof will be omitted.

The multi-waveguide film 100 is positioned below the first waveguide film 120 and the first waveguide film 120 including the first plate pattern 120a and the first side pattern 120b, and the second plate pattern 140a. ) And a second waveguide film 140 including a second side pattern 140b and an auxiliary layer 145 formed by printing a transparent ink on an upper surface thereof. In some embodiments, the first waveguide film 120 may include only the first plate pattern 120a. In addition, the multi-waveguide film 100 is irradiated with light independently from the first and second light sources, the first waveguide film 120 is irradiated with light from the first light source located on the side of the first waveguide film 120. The second waveguide film 140 may be irradiated with light from a second light source positioned at the side of the second waveguide film 140. The first and second light sources may be light emitting diodes, and may independently irradiate light to the first and second waveguide films 120 and 140 by a circuit board for controlling their operation.

As described above, the multi-waveguide film 100 may selectively emit the first plate pattern 120a and the first side pattern 120b or the second plate pattern 140a and the second side pattern 140b at the same time. In addition, while blocking light interference between the first waveguide film 120 and the second waveguide film 140, the luminance of light traveling upward from the second waveguide film 140 may be greatly improved. Accordingly, the conversion type multiple keypad 240 includes the waveguide film 100 so that the first plate pattern 120a and the first side pattern 120b or the second plate pattern 140a and the second side pattern ( 140b) may be selectively emitted at the same time, and light interference such as overlapping in the first plate pattern 120a and the second plate pattern 140a is displayed on the pad 242, and the first plate pattern 120a and the second plate pattern 140a may be minimized. It is possible to prevent a substantial difference between the luminance of the light that causes the plate pattern 120a to be displayed on the pad 242 and the luminance of the light that causes the second plate pattern 140a to be displayed on the pad 242. .

In addition, the conversion-type multiple keypad 240 may separately separate the first plate pattern 120a and the first side pattern 120b or the second plate pattern 140a and the second side pattern 140b at the same time. The multi-waveguide film 100 does not require an additional configuration, and does not require an additional configuration for blocking light interference between the first waveguide film 120 and the second waveguide film 140 and improving the brightness of the light. Because it includes, it can be manufactured in a slim form, can be manufactured in a simplified process, and can greatly reduce the manufacturing time and manufacturing cost. That is, the conversion-type multi-keypad 240 can emit various patterns formed in various colors at the same time, so that the appearance is beautiful and can be uniform while improving the brightness of the light emitted from the multi-waveguide film 100. The user can increase the visibility of the keypad operation, the slim and simple manufacturing process compared to the conventional keypad is suitable for mass production.

However, since the configuration and description of the conversion-type multiple keypad 240 shown in FIGS. 3 to 4 are exemplary, the technical idea of the present invention is that of the conversion-type multiple keypad 240 shown in FIGS. It should not be limited only to the configuration and the description thereof. For example, the conversion multi-keypad 240 further includes a design layer positioned between the pad 242 and the multi-waveguide film 100 to generate a three-dimensional effect, such that the first plate pattern 120a and the second plate pattern are included. The stereoscopic effect may be expressed when the 140b is displayed on the pad 242. In addition, the first plate pattern 120a and the second plate pattern 140a are not formed to overlap each other, but the first plate pattern 120a and the second plate pattern 140a do not overlap each other. And may be selectively displayed on the convertible multiple keypad 240.

5 is a cross-sectional view illustrating a multiple waveguide film according to another embodiment of the present invention, and FIG. 6 is a plan view illustrating the multiple waveguide film of FIG. 5.

5 to 6, the multiple waveguide film 300 may include a first waveguide film 320, a second waveguide film 340, and a third waveguide film 360, and a second waveguide film ( The first auxiliary layer 345 may be formed on the upper surface of the 340, and the second auxiliary layer 365 may be formed on the upper surface of the third waveguide film 360. Here, since the expression film is interpreted as a plate, a sheet or the like capable of guiding light, the technical idea of the present invention should not be limited to the film.

The first waveguide film 320 is positioned on the second waveguide film 340 and may include a first plate pattern 320a and a first side pattern 320b. However, according to the exemplary embodiment, the first waveguide film 320 may include only the first plate surface pattern 320a. As the first waveguide film 320, a substrate such as PC, PE, PET, PMMA, or PU may be used. The first plate pattern 320a may be formed on the plate surface of the first waveguide film 320 by a printing method, a laser method, a hot press method, a CNC method, an etching method, and the like. One side of the waveguide film 320 may be formed by a CNC method, an etching method, a laser method and the like. The first side pattern 320b may be formed only on a side surface of the first waveguide film 320 where light is emitted from the first side pattern 320b. For example, FIG. 6 shows that the first side surface pattern 320b is not formed on the first side surface A of the first waveguide film 320.

The second waveguide film 340 may be positioned below the first waveguide film 320 and may include a second plate pattern 340a and a second side pattern 340b. Like the first waveguide film 320, a substrate such as PC, PE, PET, PMMA, or PU may be used as the second waveguide film 340. The second plate pattern 340a may be formed on the plate surface of the second waveguide film 340 by a printing method, a laser method, a hot press method, a CNC method, an etching method, and the like. On the side of the two waveguide film 340 may be formed by a CNC method, an etching method, a laser method and the like. The second side pattern 340b may be formed only on a side surface of the second waveguide film 340 where light is emitted from the second side pattern 340b. For example, FIG. 6 shows that the second side pattern 340b is not formed on the first side A of the second waveguide film 340.

The third waveguide film 360 may be positioned below the second waveguide film 340 and may include a third plate pattern 360a and a third side pattern 360b. Like the first waveguide film 320 and the second waveguide film 340, a substrate such as PC, PE, PET, PMMA, PU, etc. may be used as the third waveguide film 360. The third plate pattern 360a may be formed on the plate surface of the third waveguide film 360 by a printing method, a laser method, a hot press method, a CNC method, an etching method, and the like. It may be formed on the side of the three waveguide film 360 by a CNC method, an etching method, a laser method and the like. The third side pattern 360b may be formed only on the side surface of the third waveguide film 360 where the third side pattern 360b needs to emit light. For example, FIG. 5 shows that the third side pattern 360b is not formed on the first side A of the third waveguide film 360.

Each of the first waveguide film 320, the second waveguide film 340, and the third waveguide film 360 may be independently irradiated with light from different light sources. That is, the first waveguide film 320 may be irradiated with light from a light source located on the side of the first waveguide film 320, and the second waveguide film 340 is a light source located on the side of the second waveguide film 340. The light may be irradiated from the third waveguide film 360, and the third waveguide film 360 may be irradiated with light from a light source located at the side of the third waveguide film 360. In this case, the light source may be a light emitting diode, but is not limited thereto. In some embodiments, through holes may be formed in the first waveguide film 320, the second waveguide film 340, or the third waveguide film 360, and the first waveguide film 320 and the second waveguide film 340 may be formed. And the third waveguide film 360 may be irradiated with light from a light source located at an inner side surface of the through hole.

Light irradiated to the first waveguide film 320 is emitted to the outside from the first plate pattern 320a and the first side pattern 320b through the inside of the first waveguide film 320, and the second waveguide film 340. ) Is emitted to the outside from the second plate pattern 340a and the second side pattern 340b through the inside of the second waveguide film 340, and the light emitted to the third waveguide film 360 The light is emitted to the outside from the third plate pattern 360a and the third side pattern 360b through the inside of the third waveguide film 360. That is, the first plate pattern 320a and the first side pattern 320b may emit light simultaneously from the plate surface and the side surface of the first waveguide film 320, and the second plate pattern 340a and the second side pattern 340b may emit light. ) May simultaneously emit light from the plate surface and the side of the second waveguide film 340, and the third plate pattern 360a and the third side pattern 360b simultaneously emit light from the plate surface and the side of the third waveguide film 360. can do. As such, the multi-waveguide film 300 may include the first plate pattern 320a, the first side pattern 320b, the second plate pattern 340a, the second side pattern 340b, or the third plate pattern 360a. The third side pattern 360b may be selectively emitted at the same time.

Although not shown in FIGS. 5 to 6, the first waveguide film 320 may include a first refraction portion for refracting light traveling to the first plate pattern 320a and the first side pattern 320b. The second waveguide film 340 may also include a second refracting portion for refracting the light traveling to the second plate pattern 340a and the second side pattern 340b, and the third waveguide film 360 may also be third. It may include a third refracting portion for refracting the light traveling to the plate pattern 360a and the third side pattern 360b. The first refraction portion may be formed around the first plate pattern 320a and the first side pattern 320b to refract light directed toward the first plate pattern 320a and the first side pattern 320b to adjust the amount of light. The second refraction portion may also be formed around the second plate pattern 340a and the second side pattern 340b to refract light directed toward the second plate pattern 340a and the second side pattern 340b to adjust the amount of light. The third refraction portion may also be formed around the third plate pattern 360a and the third side pattern 360b to refract light directed toward the third plate pattern 360a and the third side pattern 360b to adjust the amount of light. .

The patterns formed on the first waveguide film 320, the second waveguide film 340, and the third waveguide film 360 may be color patterns in order to produce various atmospheres through the light emission of the patterns in the multi-waveguide film 300. . That is, the first plate pattern 320a and the first side pattern 320b are formed in the first color (for example, red), and the second plate pattern 340a and the second side pattern 340b are the second. Colors (eg, green) may be formed, and the third plate pattern 360a and the third side pattern 360b may be formed of a third color (eg, blue). In addition, the first plate pattern 320a is formed of a first color (eg, red), the first side pattern 320b is formed of a second color (eg, green), and the second plate pattern The 340a is formed of a third color (eg, blue), the second side pattern 340b is formed of a fourth color (eg, yellow), and the third plate pattern 360a is formed of a fifth color. The third side pattern 360b may be formed in a color (eg, purple), and may be formed in a sixth color (eg, yellow). For example, the first plate pattern 320a is a pattern in the form of a letter, the second plate pattern 340b is a pattern in the form of a number, and the third plate pattern 360b is a pattern in the form of a figure, Assuming that the three side patterns 320b, 340b, and 360b are strip-shaped patterns, lighting of different atmospheres may be provided according to the patterns, so that the user may feel aesthetics. However, this is only one example, and the combination of colors may be variously changed according to a required condition.

The first auxiliary layer 345 may be formed on the upper surface of the second waveguide film 340, and the second auxiliary layer 365 may be formed on the upper surface of the third waveguide film 360. The first auxiliary layer 345 and the second auxiliary layer 365 block light interference between the first to third waveguide films 320, 340, and 360, and are irradiated onto the second waveguide film 340 to form an upper portion. In order to improve the luminance of the light propagating toward the third waveguide film 360 and the luminance of the light propagating upward, the transparent ink is formed on the upper surfaces of the second waveguide film 340 and the third waveguide film 360, respectively. It may be formed in a printed manner. In this case, the transparent ink may be a light reflecting ink having an effect of reflecting light by adding reflective beads or pearl particles or a light diffusing ink having an effect of diffusing light. Accordingly, a first auxiliary layer 345 having a light reflection effect or a light diffusion effect is positioned between the first waveguide film 320 and the second waveguide film 340, and the second waveguide film 340 and the third waveguide film 340 are disposed between the first waveguide film 320 and the second waveguide film 340. A second auxiliary layer 365 having a light reflection effect or a light diffusion effect is also disposed between the waveguide films 360 to prevent light interference between the first to third waveguide films 320, 340, and 360, thereby moiring. Problems such as a phenomenon can be solved.

In addition, when light is irradiated onto the second waveguide film 340 from the light source, the irradiated light travels upward through the first auxiliary layer 345, so that the light is reflected or reflected from the first auxiliary layer 345. It can diffuse and proceed upwards. As a result, the brightness of the light irradiated to the second waveguide film 340 from the light source to the upper portion can be greatly improved. In addition, when light is irradiated to the third waveguide film 360 from the light source, the irradiated light travels upward through the second auxiliary layer 365 and the first auxiliary layer 345, so that the light is second assisted. Reflected or diffused from the layer 365 and the first auxiliary layer 345 to proceed upward. As a result, the luminance of the light that is irradiated to the third waveguide film 360 from the light source and proceeds upward may be greatly improved. Therefore, the luminance of the light irradiated to the first to third waveguide films 320, 340, and 360 and directed upward may be substantially the same. As such, the multi-waveguide film 300 forms the first and second auxiliary layers 345 and 365 having the light reflection effect or the light diffusion effect on the second and third waveguide films 340 and 360, respectively. As a result, light interference between the first to third waveguide films 320, 340, and 360 may be more effectively blocked, and the light and the third waveguide film irradiated to the second waveguide film 340 from the light source to travel to the outside ( The luminance of light may be greatly improved by passing the light irradiated to the outside 360 through the first auxiliary layer 345 or / and the second auxiliary layer 365 having the light reflection effect or the light diffusion effect. have.

 As described above, the multi-waveguide film 300 has a first plate pattern 320a and a first side pattern 320b, a second plate pattern 340a and a second side pattern 340b, or a third plate pattern 360a. ) And the third side pattern 360b may simultaneously emit light selectively, and block the light interference between the first to third waveguide films 320, 340, and 360, while the second waveguide film 340 and the third waveguide The brightness of the light traveling upward from the film 360 can be greatly improved. In addition, the multi-waveguide film 300 may include a first plate pattern 320a and a first side pattern 320b, a second plate pattern 340a and a second side pattern 340b, or a third plate pattern 360a and a third plate pattern. It does not require a separate additional configuration for selectively emitting the three side pattern (360b) at the same time, a separate to block the light interference between the first to third waveguide film (320, 340, 360) and to improve the brightness of the light Since it does not require an additional configuration of, it can be manufactured in a slim form, can be manufactured in a simplified process, and can greatly reduce the manufacturing time and manufacturing cost.

However, since the configuration and description of the multiple waveguide film 300 shown in FIGS. 5 to 6 are exemplary, the technical idea of the present invention is the configuration and configuration of the multiple waveguide film 300 shown in FIGS. It should not be limited only to the description thereof. For example, in the above, the first auxiliary layer 345 is formed in such a manner that the transparent ink is printed on the upper surface of the second waveguide film 340, and the second auxiliary layer 365 is formed of the third waveguide film 360. It has been described that the upper surface is formed in such a manner that the transparent ink is printed, but this is an example, in which the first and second auxiliary layers 345 and 365 are formed on the upper surface of the second and third waveguide films 340 and 360 according to a manufacturing process. The transparent ink may be formed in various ways, for example. Further, the first waveguide film 320 and the first waveguide film 320 and the second waveguide film 340 and the edge region of the second waveguide film 340 and the third waveguide film 360, respectively. An adhesive or a double-sided tape for bonding the second waveguide film 340, the second waveguide film 340, and the third waveguide film 360 to each other may be disposed, and the first to third side patterns 320b, 340b, A light-shielding tape or the like is disposed between the first side pattern 320b and the second side pattern 340b and the second side pattern 340b and the third side pattern 360b so that the light emitted from the 360b does not affect each other. Can be located. Further, although the multi-waveguide film 300 is described as including the first to third waveguide films 320, 340, 360, this is an example of three or more waveguides under the first waveguide film 320 Naturally, the films can be located.

7 is a cross-sectional view illustrating a convertible multiple keypad according to another embodiment of the present invention, and FIG. 8 is a perspective view illustrating the convertible multiple keypad of FIG. 7.

Referring to FIGS. 7 to 8, the convertible multiple keypad 440 may include a pad 442 having a plurality of buttons, a multiple waveguide film 300 positioned below the pad 442, and multiple The waveguide film 300 may include first to third waveguide films 320, 340, and 360, and the first and second auxiliary layers may be formed on upper surfaces of the second and third waveguide films 340 and 360, respectively. 345 and 365 may be formed. However, the circuit board for controlling the operation of the conversion type multiple keypad 440 and the light sources for irradiating light to the multiple waveguide film 300 correspond to the general ones, and thus are not illustrated.

When the conversion type multiple keypad 440 is applied with an external pressure to the pad 442, the external pressure is transmitted to the dome switch of the circuit board positioned below the multi waveguide film 300 via the multi waveguide film 300. It can work. In addition, when the touch signal is applied to the pad 442, the conversion type multiple keypad 440 may operate in a manner in which the pad 442 or the multi-waveguide film 300 detects the touch signal. Furthermore, the conversion type multiple keypad 440 further includes a touch sheet that senses a touch signal when a touch signal is applied to the pad 442 so that the touch sheet can also operate in a manner of detecting a touch signal on the pad 442. have. As such, the operation of the convertible multiple keypad 440 may be performed in various ways, and is not limited to the above-described method. However, since the operation method of the keypad itself is general, detailed description thereof will be omitted.

The multi-waveguide film 300 is positioned below the first waveguide film 320 and the first waveguide film 320 including the first plate pattern 320a and the first side pattern 320b, and the second plate pattern 340a. And a second side surface pattern 340b and positioned under the second waveguide film 340 and the second waveguide film 340 having an auxiliary layer 345 formed by printing transparent ink on the upper surface. It may include a third waveguide film 360 including a pattern 360a and a third side pattern 360b and having an auxiliary layer 365 formed by printing transparent ink on an upper surface thereof. In some embodiments, the first waveguide film 320 may include only the first plate pattern 320a. In addition, the multi-waveguide film 300 is irradiated with light independently from the first to third light sources, the first waveguide film 320 is irradiated with light from the first light source located on the side of the first waveguide film 320. The second waveguide film 340 may be irradiated with light from a second light source positioned at the side of the second waveguide film 340, and the third waveguide film 360 may have a side surface of the third waveguide film 360. Light may be irradiated from a third light source positioned at. The first to third light sources may be light emitting diodes, and may independently irradiate light to the first to third waveguide films 320, 340, and 360 by a circuit board for controlling their operations.

As described above, the multi-waveguide film 300 has a first plate pattern 320a and a first side pattern 320b, a second plate pattern 340a and a second side pattern 340b, or a third plate pattern 360a. ) And the third side pattern 360b may simultaneously emit light selectively, and block the interference of light between the first to third waveguide films 320, 340, and 360, while the second and third waveguide films 340 and 360. It is possible to greatly improve the brightness of the light that proceeds from the top to). Therefore, the conversion multi-keypad 440 includes the waveguide film 300 so that the first plate pattern 320a and the first side pattern 320b, the second plate pattern 340a and the second side pattern ( 340b or the third plate pattern 360a and the third side pattern 360b may be selectively emitted at the same time, and the first to third plate patterns 320a, 340a, and 360a are displayed on the pad 442. Light interference, such as overlapping, may be minimized, and the luminance of the light such that the first plate pattern 320a is displayed on the pad 442 and the second plate pattern 340a may be displayed on the pad 442. It is possible to prevent a substantial difference between the luminance of the light and the luminance of the light such that the third plate pattern 360a is displayed on the pad 442.

In addition, the conversion type multiple keypad 440 may include a first plate pattern 320a and a first side pattern 320b, a second plate pattern 340a and a second side pattern 340b, or a third plate pattern 360a. Blocking light interference between the first and third waveguide films 320, 340, 360 and improving the brightness of light without requiring a separate additional configuration for selectively emitting the light and the third side pattern 360b simultaneously. Because it includes multiple waveguide films 300, which do not require a separate additional configuration, it can be manufactured in a slim form, can be manufactured in a simplified process, and can greatly reduce the manufacturing time and manufacturing cost. That is, the conversion-type multiple keypad 440 may emit various patterns formed in various colors at the same time, so that the appearance is beautiful and uniform while improving the luminance of the light emitted from the multi-waveguide film 300. The user can increase the visibility of the keypad operation, the slim and simple manufacturing process compared to the conventional keypad is suitable for mass production.

However, since the configuration and description of the convertible multiple keypad 440 illustrated in FIGS. 7 to 8 are exemplary, the technical idea of the present invention may be described in detail with reference to the converted multiple keypad 440 illustrated in FIGS. 7 to 8. It should not be limited only to the configuration and the description thereof. For example, the convertible multi-keypad 440 further includes a design layer positioned between the pad 442 and the multi-waveguide film 300 to generate a stereo effect so that the first to third planar patterns 320a, 340a, 360a) may be displayed on the pad 442 to allow a stereo effect to be expressed. In addition, the first to third plate patterns 320a, 340a, and 360a are not formed to overlap each other, but the first to third plate patterns 320a, 340a, and 360a are not formed to overlap each other. It may be selectively displayed on the multi-function keypad 440.

FIG. 9 is a diagram illustrating an electronic device including a convertible multiple keypad according to embodiments of the present disclosure.

Referring to FIG. 9, the electronic device 500 may include a display 520 and a convertible multiple keypad 540, and the convertible multiple keypad 540 may include a pad including a plurality of buttons and a lower portion of the pad. A multi-waveguide film positioned, a plurality of light sources for irradiating light onto the multi-waveguide film, and a circuit board for controlling the operation of the convertible multi-keypad 540, wherein the multi-waveguide film includes a first plate pattern and A second waveguide film including a first side wave pattern and a first waveguide film positioned below the first waveguide film and including a second plate pattern and a second side pattern and having a first auxiliary layer formed by printing a first transparent ink on an upper surface A first waveguide film comprising a waveguide film, or comprising a first plate pattern and a first side pattern, positioned below the first waveguide film, and including a second plate pattern and a second side pattern. A second waveguide film having a first auxiliary layer formed by printing a first transparent ink on an upper surface thereof, a lower portion of the second waveguide film and a third plate pattern and a third side pattern, and a second transparent ink printed on the upper surface of the second waveguide film. It may comprise a third waveguide film having a second auxiliary layer formed thereby. However, since the multi-waveguide film and the conversion-type multiple keypad including the same have been described above, detailed description thereof will be omitted.

The conversion type multiple keypad 540 included in the electronic device 500 may selectively emit a plurality of plate patterns 542, for example, a number pattern, a Korean pattern, an English pattern, and a picture pattern, on a button. This selective pattern display operation is achieved by a plurality of light sources controlled by a circuit board selectively irradiating light onto the plurality of waveguide films, respectively. In this case, the conversion type multiple keypad 540 includes multiple waveguide films to prevent light interference such as overlapping between the plurality of plate patterns 542, for example, a number pattern, a Korean pattern, an English pattern, and a picture pattern. The plurality of plate patterns 542, for example, a number pattern, a Korean pattern, an English pattern, and a picture pattern, may prevent a substantial difference between luminance of light emitted from the keypad 540. In addition, when the plurality of plate patterns 542, for example, a number pattern, a Korean pattern, an English pattern, and a picture pattern emit light, the respective side patterns 542 corresponding to the respective plate patterns 542 are provided. For example, band-shaped patterns may be simultaneously emitted. Therefore, the electronic device 500 may include a multi-waveguide film and a convertible multi-keypad including the same, and may also be manufactured in a slim form, and may have a beautiful appearance by colorful lighting.

In the above, the multi-waveguide film, the conversion-type multi-keypad and the electronic device have been described in detail with reference to the embodiments of the present invention. However, these examples are provided by way of example, without departing from the spirit of the present invention. Various modifications and changes can be made by the user.

According to the present invention, the multi-waveguide film can block the light interference between the waveguide films, improve the brightness of the light guided to the upper portion in the waveguide film located at the bottom, and without additional configuration of the waveguide film Various patterns provided on the plate surface and the side can be selectively emitted at the same time. In addition, the conversion type multiple keypad can increase the number of patterns displayed on one keypad by including the multiple waveguide film, can display various patterns with improved brightness of light, and can simultaneously display various patterns on the plane and side. It can selectively emit light. Thus, multiple waveguide films and convertible multiple keypads can be manufactured in a slim and simple form, including cellular phones, smart phones, portable multimedia players (PMPs), MP3 players (MP3Ps), and personal digital assistants (PDAs). The present invention may be variously applied to an electronic device including a keypad such as a digital assistant, a game player, a notebook, and the like.

Although the above has been described with reference to preferred embodiments of the present invention, those skilled in the art may variously modify the present invention without departing from the spirit and scope of the present invention as set forth in the claims below. And can be changed.

1 is a cross-sectional view showing a multiple waveguide film according to an embodiment of the present invention.

FIG. 2 is a plan view illustrating the multiple waveguide film of FIG. 1. FIG.

3 is a cross-sectional view illustrating a convertible multiple keypad according to an embodiment of the present invention.

FIG. 4 is a perspective view illustrating the multiple conversion keypad of FIG. 3.

5 is a cross-sectional view illustrating a multiple waveguide film according to another embodiment of the present invention.

FIG. 6 is a plan view illustrating the multiple waveguide film of FIG. 5. FIG.

7 is a cross-sectional view illustrating a convertible multiple keypad according to another embodiment of the present invention.

FIG. 8 is a perspective view illustrating the conversion type multiple keypad of FIG. 7.

FIG. 9 is a diagram illustrating an electronic device including a convertible multiple keypad according to embodiments of the present disclosure.

<Explanation of symbols for the main parts of the drawings>

100: multiple waveguide film 120: first waveguide film

120a: first plate surface pattern 120b: first side pattern

140: second waveguide film 140a: second plate surface pattern

140b: second side pattern 145: auxiliary layer

Claims (28)

A first waveguide film having a first plate surface pattern; And And a second waveguide film disposed below the first waveguide film, the second waveguide film having a second plate pattern and a second side pattern and having an auxiliary layer formed on the upper surface thereof. The multiple waveguide film of claim 1, wherein the first waveguide film further comprises a first side pattern. The method of claim 2, wherein the first plate pattern and the first side pattern are patterns having a first color, and the second plate pattern and the second side pattern are patterns having a second color. Waveguide film. The method of claim 2, wherein the first plate pattern is a pattern having a first color, the first side pattern is a pattern having a second color, and the second plate pattern is a pattern having a third color. And wherein the two side patterns are patterns having a fourth color. The method of claim 1, wherein the auxiliary layer blocks light interference between the first waveguide film and the second waveguide film and improves brightness of light guided upward from the second waveguide film. Waveguide film made with. The multiple waveguide film of claim 5, wherein the auxiliary layer is formed by printing a transparent ink on the second waveguide film. The multi-waveguide film of claim 6, wherein the transparent ink is a light reflection ink having a light reflecting effect or a light diffusing ink having a light diffusing effect. The multiple waveguide film of claim 1, wherein each of the first and second waveguide films is independently irradiated with light by different light sources. A first waveguide film having a first plate surface pattern; A second waveguide film disposed under the first waveguide film and having a second plate pattern and a second side pattern and having a first auxiliary layer formed on an upper surface thereof; And And a third waveguide film disposed under the second waveguide film, the third waveguide film having a third plate pattern and a third side pattern, and having a second auxiliary layer formed on an upper surface thereof. 10. The multiple waveguide film of claim 9, wherein the first waveguide film further comprises a first side pattern. 11. The method of claim 10, wherein the first plate pattern and the first side pattern is a pattern having a first color, the second plate pattern and the second side pattern is a pattern having a second color, the third plate surface The pattern and the third side pattern are multiple waveguide films, characterized in that the pattern having a third color. The method of claim 10, wherein the first plate pattern is a pattern having a first color, the first side pattern is a pattern having a second color, and the second plate pattern is a pattern having a third color. The second side pattern is a pattern having a fourth color, the third plate pattern is a pattern having a fifth color, and the third side pattern is a pattern having a sixth color. The method of claim 9, wherein the first auxiliary layer blocks light interference between the first waveguide film and the second waveguide film, and improves the brightness of light guided upward from the second waveguide film. The auxiliary layer blocks the light interference between the second waveguide film and the third waveguide film and improves the brightness of light guided upward from the third waveguide film. The method of claim 13, wherein the first auxiliary layer is formed by printing a first transparent ink on the second waveguide film, and the second auxiliary layer is formed by printing a second transparent ink on the third waveguide film. Characterized by multiple waveguide films. 15. The multi-waveguide film of claim 14, wherein the first and second transparent inks are light reflecting inks having the effect of reflecting light or light diffusing inks having the effect of diffusing light. The multi-waveguide film of claim 9, wherein each of the first, second, and third waveguide films is independently irradiated with light by different light sources. A pad having a plurality of buttons; A multiple waveguide film positioned below the pad; And It includes a plurality of light sources for irradiating light to the multiple waveguide film, The multi-waveguide film is A first waveguide film having a first plate surface pattern; And And a second waveguide film positioned below the first waveguide film, the second waveguide film having a second plate pattern and a second side pattern, and having an auxiliary layer formed on an upper surface thereof. 18. The convertible multiple keypad of claim 17, wherein the first waveguide film further comprises a first side pattern. The method of claim 17, And a design layer positioned between the pad and the multiple waveguide film to generate a stereoscopic effect. 18. The convertible multiple keypad of claim 17, wherein when an external pressure is applied to the pad, the keypad is operated in such a way that the external pressure is transmitted to a circuit board having a dome switch. 18. The convertible multi-keypad according to claim 17, wherein when a touch signal is applied to the pad, the keypad or the multi-waveguide film detects the touch signal. The method of claim 17, Further comprising a touch sheet for sensing the touch signal when a touch signal is applied to the pad, And a keypad operation is performed in a manner that the touch sheet senses the touch signal. A pad having a plurality of buttons; A multiple waveguide film positioned below the pad; And It includes a plurality of light sources for irradiating light to the multiple waveguide film, The multi-waveguide film is A first waveguide film having a first plate surface pattern; A second waveguide film disposed under the first waveguide film and having a second plate pattern and a second side pattern and having a first auxiliary layer formed on an upper surface thereof; And And a third waveguide film positioned below the second waveguide film, the third waveguide film having a third plate pattern and a third side pattern, and having a second auxiliary layer formed on an upper surface thereof. 24. The convertible multiple keypad of claim 23, wherein the first waveguide film further comprises a first side pattern. The method of claim 23, And a design layer positioned between the pad and the multiple waveguide film to generate a stereoscopic effect. 24. The convertible multiple keypad of claim 23, wherein a keypad operation is performed in such a manner that when an external pressure is applied to the pad, the external pressure is transmitted to a circuit board having a dome switch. 24. The convertible multi-keypad according to claim 23, wherein when a touch signal is applied to the pad, the keypad or the multi-waveguide film detects the touch signal. The method of claim 23, Further comprising a touch sheet for sensing the touch signal when a touch signal is applied to the pad, And a keypad operation is performed in a manner that the touch sheet senses the touch signal.

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