KR20100132165A - Dome waveguid sheet - Google Patents

Dome waveguid sheet Download PDF

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Publication number
KR20100132165A
KR20100132165A KR1020090050840A KR20090050840A KR20100132165A KR 20100132165 A KR20100132165 A KR 20100132165A KR 1020090050840 A KR1020090050840 A KR 1020090050840A KR 20090050840 A KR20090050840 A KR 20090050840A KR 20100132165 A KR20100132165 A KR 20100132165A
Authority
KR
South Korea
Prior art keywords
sheet
dome
light
embossing
led lamp
Prior art date
Application number
KR1020090050840A
Other languages
Korean (ko)
Inventor
윤대식
Original Assignee
주식회사 하이텍솔루션
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 주식회사 하이텍솔루션 filed Critical 주식회사 하이텍솔루션
Priority to KR1020090050840A priority Critical patent/KR20100132165A/en
Publication of KR20100132165A publication Critical patent/KR20100132165A/en

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H13/00—Switches having rectilinearly-movable operating part or parts adapted for pushing or pulling in one direction only, e.g. push-button switch
    • H01H13/02—Details
    • H01H13/26—Snap-action arrangements depending upon deformation of elastic members
    • H01H13/48—Snap-action arrangements depending upon deformation of elastic members using buckling of disc springs
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H13/00—Switches having rectilinearly-movable operating part or parts adapted for pushing or pulling in one direction only, e.g. push-button switch
    • H01H13/70—Switches having rectilinearly-movable operating part or parts adapted for pushing or pulling in one direction only, e.g. push-button switch having a plurality of operating members associated with different sets of contacts, e.g. keyboard
    • H01H13/702—Switches having rectilinearly-movable operating part or parts adapted for pushing or pulling in one direction only, e.g. push-button switch having a plurality of operating members associated with different sets of contacts, e.g. keyboard with contacts carried by or formed from layers in a multilayer structure, e.g. membrane switches
    • H01H13/704—Switches having rectilinearly-movable operating part or parts adapted for pushing or pulling in one direction only, e.g. push-button switch having a plurality of operating members associated with different sets of contacts, e.g. keyboard with contacts carried by or formed from layers in a multilayer structure, e.g. membrane switches characterised by the layers, e.g. by their material or structure
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H13/00—Switches having rectilinearly-movable operating part or parts adapted for pushing or pulling in one direction only, e.g. push-button switch
    • H01H13/70—Switches having rectilinearly-movable operating part or parts adapted for pushing or pulling in one direction only, e.g. push-button switch having a plurality of operating members associated with different sets of contacts, e.g. keyboard
    • H01H13/702—Switches having rectilinearly-movable operating part or parts adapted for pushing or pulling in one direction only, e.g. push-button switch having a plurality of operating members associated with different sets of contacts, e.g. keyboard with contacts carried by or formed from layers in a multilayer structure, e.g. membrane switches
    • H01H13/705—Switches having rectilinearly-movable operating part or parts adapted for pushing or pulling in one direction only, e.g. push-button switch having a plurality of operating members associated with different sets of contacts, e.g. keyboard with contacts carried by or formed from layers in a multilayer structure, e.g. membrane switches characterised by construction, mounting or arrangement of operating parts, e.g. push-buttons or keys
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H13/00—Switches having rectilinearly-movable operating part or parts adapted for pushing or pulling in one direction only, e.g. push-button switch
    • H01H13/70—Switches having rectilinearly-movable operating part or parts adapted for pushing or pulling in one direction only, e.g. push-button switch having a plurality of operating members associated with different sets of contacts, e.g. keyboard
    • H01H13/83—Switches having rectilinearly-movable operating part or parts adapted for pushing or pulling in one direction only, e.g. push-button switch having a plurality of operating members associated with different sets of contacts, e.g. keyboard characterised by legends, e.g. Braille, liquid crystal displays, light emitting or optical elements
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M1/00—Substation equipment, e.g. for use by subscribers
    • H04M1/02—Constructional features of telephone sets
    • H04M1/22—Illumination; Arrangements for improving the visibility of characters on dials
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H2219/00—Legends
    • H01H2219/002—Legends replaceable; adaptable
    • H01H2219/014—LED

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  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Push-Button Switches (AREA)

Abstract

The present invention relates to a dome waveguide film composed of a top sheet and a base sheet to enlarge a passage through which light is transmitted, and to give light to the entire keypad by giving a pattern to each of the top sheet and the base sheet. The configuration is a dome sheet used in the keypad of the mobile phone, the LED lamp insertion portion in which the LED lamp is located and the dome portion dome is inserted and the base sheet formed with a light control unit for refracting the light of the LED lamp; The base sheet is laminated on the bottom surface, and fine embossing is applied to the upper surface to prevent the light emitted from the LED lamp from being refracted by the embossing and being lost to the outside, and is formed deeper and wider than the embossing of the embossing treatment part to emit light. It is achieved to have a technical feature consisting of; a top sheet having a refracting portion for refracting.

Description

Dome waveguid sheet

The present invention relates to a dome waveguide film, and more particularly, is composed of a top sheet and a base sheet to enlarge a passage through which light is transmitted, and give a pattern to each of the top sheet and the base sheet so that light can be transmitted evenly throughout the keypad. To dome waveguide film.

In addition, the present invention relates to a dome waveguide film that is excellent in fabrication and assemblability, but also enables weight reduction, slimming and miniaturization of a keypad.

In general, the waveguide film is called LGP (light guide plate) or waveguide depending on the manufacturing company, and is used in various electronic products including a keypad of a mobile phone.

The waveguide film, which minimizes the loss of light by constantly adjusting the light path, is being applied to the keypad of a mobile phone according to the trend of miniaturization, light weight, and slimness of the product, and the technology is also rapidly developing.

For example, previous mobile phones have LEDs on the board as a backlight function to enable the identification of letters, numbers, and symbols even at night.However, due to the large number of LEDs and the inherent thickness of LEDs, mobile phones are slimmer and smaller. It was difficult to do.

It is said waveguide film employ | adopted for this.

As described above, this film is an optical film that can adjust the light path uniformly, disperse, and increase the brightness, and significantly reduce the number of LEDs compared to the keypad of the existing mobile phone, thereby making the keypad lighter and slimmer.

There are many examples where a waveguide film is applied to a keypad.

As the "doparo sheet" of Korean Utility Model Registration No. 20-0438047 can be seen in its main configuration,

A waveguide sheet on which a dot pattern having a diffusion characteristic is formed by any one of screen printing, mold injection, and laser processing; An adhesive layer formed of a double-sided tape or an adhesive while being formed at a portion where the FPCB is to be assembled under the waveguide sheet; An FPCB connected to the connector while only the LED is mounted, and assembled to the lower portion of the waveguide sheet through the adhesive layer; An adhesive layer formed of a double-sided tape or an adhesive and formed on a portion of the lower portion of the waveguide sheet in which the FPCB is not assembled; It characterized in that it comprises an actuator formed in the lower portion of the waveguide sheet to give a click feeling through the adhesive layer.

As another example, the “metal dome sheet” of Korean Patent No. 0851658 may include a base sheet on which a metal dome is installed; And multi-layered on the base sheet is fixed to the metal dome, and includes a multi-waveguide sheet for transmitting each of the light of the light source to the keypad installed on the upper,

The multi-waveguide sheet is composed of first, second, and third waveguide sheets, and the first, second, and third waveguide sheets are provided with first, second, and third light inputs for allowing light from the light source to be incident thereon. The first, second, and third light input parts are provided with color filters for allowing the keypad to be expressed in various colors.

By the way, there are some conventional problems.

First, there is no choice but to limit the diffusion and refraction of light.

In other words, in the above example, the "waveguide sheet" is irradiated from the end of the sheet so that the light does not reach the opposite side, and the "metal dome sheet" adopts multiple sheets, which causes the light to be blurred. have.

Second, the “metal dome sheet” composed of multiple sheets has a problem in that when the air layer is formed between the sheets, the thickness of the keypad becomes thick, making it difficult to achieve slimness, and the sheet may fall due to poor adhesion.

In addition, the "metal dome sheet" has a problem that it is difficult to reach the top of the key top of the keypad, that is, the LED light of the bottom while the third sheet is sequentially stacked from the first sheet.

Lastly, the above example has a problem in that a feeling of click is inferior in contact with a multi-sheet or a direct dome.

The present invention has been made in view of such a conventional problem, and an object thereof is to enlarge a light passage and allow more light to be transmitted, and to establish a light transmission path through a first or second pattern work. An adjustable dome waveguide sheet is provided.

Another object of the present invention is to provide a dome waveguide sheet that allows the base sheet and the top sheet to be laminated without bubbles, and to absorb even light scattered from the LED side.

Still another object of the present invention is to provide a dome waveguide sheet capable of preventing light from escaping to the outside by placing a fine embossing treatment on the top surface of the top sheet.

The present invention provides a dome sheet for a mobile phone keypad, comprising: a base sheet in which an LED lamp insertion portion in which an LED lamp is located, a dome portion in which a dome is inserted, and a light adjusting portion for refracting light of the LED lamp are formed; The base sheet is laminated on the bottom surface, and fine embossing is applied to the upper surface to prevent the light emitted from the LED lamp from being refracted by the embossing and being lost to the outside, and is formed deeper and wider than the embossing of the embossing treatment part to emit light. It is achieved to have a technical feature consisting of; a top sheet having a refracting portion for refracting.

The present invention is first composed of the base sheet and the top sheet can be transmitted to the entire keypad by widening the passage through which light can pass.

Secondly, the present invention provides an embossing treatment on the top sheet so that the light is refracted by the embossing treatment to prevent loss of light, and at the same time, the light refracted by the embossing treatment on the same refraction portion as the string on the top of the keypad is more clearly displayed on the string. Has the effect of being irradiated.

Third, according to the present invention, the top sheet and the base sheet are laminated without an air layer, so that light does not get lost between them, and the dome portion provided with the dome is simply

Fourth, the top sheet of the present invention has a light shielding portion so that light blocked by the light shielding portion can be irradiated to an adjacent refraction portion so that a larger amount of light can be irradiated.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

First, Figure 1 is a perspective view of the waveguide sheet according to the present invention, Figure 2 is a plan view of the waveguide sheet according to the present invention, Figure 3 shows an enlarged cross-sectional view of the waveguide sheet of the present invention.

4 is a plan view of a base sheet applied to the waveguide sheet of the present invention, and FIGS. 5A, 5B, and C are plan views illustrating examples of the top sheet applied to the waveguide sheet of the present invention, and FIG. Is a plan view showing another embodiment,

In addition, Figure 7 is a side view showing the manufacturing process of the present invention, Figure 8 is an enlarged cross-sectional view showing the main portion of the present invention.

Prior to the description, the dome waveguide film of the present invention is applied to a keypad of a mobile phone, but in some cases, it is applied to other electronic products such as PDA, DMB, PMP, etc. to enable light weight, slimming, and miniaturization of these products.

In the drawing, the dome waveguide film 10 of the present invention is composed of a base sheet 100 and a top sheet 200.

The base sheet 100 is made of a high-transparent PC or PET film, in the present invention basically allows the light to be spread evenly through the pattern work.

The pattern of the base sheet 100 is composed of an LED lamp insertion unit 120 is inserted into the LED lamp 300 to emit light, the dome portion 140 and the lighting control unit 160.

The LDE lamp insertion unit 120 is formed in the form of perforation or drilling, the number and position of the cell phone are determined according to the type and model of the mobile phone, and the dome unit 140 is also molded in a similar form.

The dome part 140 may be formed by first drilling a hole like the LED lamp insertion part 120 and then inserting a dome separately manufactured therein, and forming a semi-circular dome on the base sheet. Of course, any of these is possible.

The lighting control unit 160 is a crack in the form of a "V" groove, which is formed by giving more cracks as the distance from the LED lamp insertion unit 120 increases, thereby improving the refractive index so that light is uniformly radiated throughout the keypad. do.

The lighting adjusting unit 160 may have a different shape, that is, a crack.

Preferably, the pattern consists of one process.

For example, the LED lamp insertion part 120, the dome part 140, and the projections and grooves for forming the lighting control part 160 are formed on the surface of the roller so that molding is performed. There is a way to cut the appearance.

Of course, such a method is also possible by a press working as an example.

The top sheet 200 is basically a film of PT, PET material is used, the embossing processing unit 220, the refraction unit 240 and the light shielding unit 260 is provided on the upper surface is provided.

The embossing processing unit 220, which is one of the core technologies of the present invention, minimizes the loss of light by making the top sheet 200 translucent, and makes the translucent surface of the transparent film finely embossed to make it translucent. Minimize.

The processing method of the fine embossing processing unit 220 is formed by roller processing or press working, and includes cold and hot working.

In addition, the shape of the embossing is also a method of forming a semi-circular shape as shown in Figure 8a and a method of giving an angle, that is, the "V" groove is continuous as shown in Figure 8b, in the case of a semi-circular method is excellent in machinability, the "V" groove method is a spring There is a disadvantage that the bag occurs, but there is an advantage in that the refractive index is better than the semi-circular.

Of course, in the present invention, no case is involved.

The embossing processing unit 220 makes the top sheet 200 translucent and refracts the light to prevent the light from escaping to the outside, and at the same time, the light is evenly applied to the entire keypad.

Here, the embossing processing unit 220 has another important function.

The top sheet 200 of the present invention having an embossing portion has a significantly increased strength compared to other films, and the increased strength leads to elastic force, thereby improving a feeling of clicking when the user presses.

Another key technology of the present invention is to allow the light of the LED lamp to reach the top of the keypad through the pattern work together with the fine embossing processing unit 220.

That is, in addition to the fine embossing processing unit 220, the refraction unit 240 is placed in the same shape and shape as the top letter sheet located at the top of the keypad. The refraction unit 240 is made of a number, consonant, vowel special symbols as shown in the figure, by forming a wider and deeper than the embossing processing unit 240 to improve the refractive index so that the light can be collected.

The light shield 240 completely prevents light from escaping to the top sheet 200 element so that the light can reach an adjacent string.

The light blocking unit 240 is configured by a printing method.

As another form of the top sheet 200, a transparent top sheet that is not translucent may be applied to the present invention.

The top sheet 200 according to this embodiment has a form in which the refracting unit 240 and the light shielding unit 260 are provided without the embossing processing unit 220.

Refractive portion 240 may also be manufactured in the form as shown in Figure 6 attached but preferably made of the same shape as the character sheet as described above.

Meanwhile, an adhesive layer 400 is provided on the bottom of the top sheet 200 and the base sheet 100 and at least on the bottom of the top sheet 200.

The adhesive layer 400 is to allow the base sheet 100 to be laminated to the top sheet 200 without an air layer.

The adhesive layer 400 is formed by spraying an adhesive, and the adhesive layer is removed in a state where a release paper is provided, and then the adhesive is made, and a transparent or translucent adhesive is used in consideration of the light transmission rate.

Of course, ink is added to the translucent adhesive layer.

Reference numeral 420 denotes a dome, that is, when the user presses a character sheet of the keypad, the dome is pressed and is in contact with the conductive layer.

Next, look at the manufacturing process of the dome waveguide sheet of the present invention having such a configuration.

The manufacturing process starts with a development request and a mass production request.

The mold is manufactured and the quality is verified by reviewing the drawings and verifying the mass production. At this time, the primary mold, that is, the roller and the press die, includes an LED insert 120, a dome unit 140, and a light control unit to enter the base sheet 100. The pattern for forming 160 is woven.

The pattern work of the primary base sheet 100 is performed through the roller or the press work, and after the work is performed with the top sheet 200, the top sheet 200 is in a state where the adhesive layer 400 is provided. .

Adhesion according to the lamination is made through a roller or a press work as shown in Figure 7, after the lamination is patterned on the top surface of the top sheet 200.

The patterning of the top sheet 200 is to place the embossing processing unit 220 and the refraction unit 240, and the roller and the press are also used.

Here, when the secondary pattern work, the roller and the press presses the base sheet 100 and the top sheet 200 so that there is no air layer therebetween.

After the secondary pattern work, a print job is performed according to the light shielding unit 260 provided, and after the print job is released through quality inspection and packaging.

The present invention constituted as described above is applied to a mobile phone keypad or PDA, DMB, PMP, etc. to enable light weight, slimness, and miniaturization of these products.

For example, in the case of a mobile phone keypad, an LED lamp and a conductive layer are provided on an upper surface of a substrate, and a dome waveguide sheet 10 of the present invention is provided in a state where a dome is provided separately, wherein the dome waveguide sheet 10 of the present invention is provided. The adhesive layer 400a provided on the bottom surface of the base sheet 100 of the base sheet 100 is adhered to the substrate in a state of being in close contact with the substrate. At this time, the dome is also adhered to the adhesive layer 400 of the top sheet 200 so that the user presses the top. The elasticity of the sheet and the adhesive layer can improve the feeling of click and at the same time can achieve the miniaturization, slimming and lightening of the mobile phone keypad.

1 is a perspective view of a waveguide sheet according to the present invention,

2 is a plan view of a waveguide sheet according to the present invention;

3 is an enlarged cross-sectional view of the waveguide sheet of the present invention;

4 is a plan view of a base sheet applied to the waveguide sheet of the present invention;

5a, b, and c are plan views showing examples of the top sheet applied to the waveguide sheet of the present invention;

Figure 6 is a plan view showing another embodiment of the waveguide sheet of the present invention,

Figure 7 is a side view showing the manufacturing process of the present invention,

8 is an enlarged cross-sectional view of the main portion of the present invention.

* Explanation of symbols for the main parts of the drawings

10: waveguide sheet 100: base sheet

120: LED lamp insertion portion 140: dome portion

200: top sheet 220: embossing processing unit

400: LED lamp

Claims (4)

Dome sheet used for cell phone keypad. A base sheet formed with an LED lamp insertion part in which an LED lamp is located, a dome part into which a dome is fitted, and a light control part for refracting light of the LED lamp; The base sheet is laminated on the bottom surface, and fine embossing is applied to the upper surface to prevent the light emitted from the LED lamp from being refracted by the embossing and being lost to the outside, and is formed deeper and wider than the embossing of the embossing treatment part to emit light. A dome waveguide sheet, characterized in that consisting of; The dome waveguide sheet according to claim 1, wherein the base sheet is provided with an adhesive layer on the bottom surface of the top sheet so that the base sheets are laminated. The dome waveguide sheet according to claim 1, wherein a refraction portion is provided on the top sheet, and the refraction portion has the same configuration as a character string located at the top of the cellular phone keypad. The dome waveguide sheet according to claim 1, wherein the embossing portion of the top sheet is formed with a semicircular or "V" groove continuously.
KR1020090050840A 2009-06-09 2009-06-09 Dome waveguid sheet KR20100132165A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1020090050840A KR20100132165A (en) 2009-06-09 2009-06-09 Dome waveguid sheet

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1020090050840A KR20100132165A (en) 2009-06-09 2009-06-09 Dome waveguid sheet

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KR20100132165A true KR20100132165A (en) 2010-12-17

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105390318A (en) * 2015-12-24 2016-03-09 江苏传艺科技股份有限公司 Thin-film switch

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105390318A (en) * 2015-12-24 2016-03-09 江苏传艺科技股份有限公司 Thin-film switch

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