KR20110026890A - Manufacturing method and the device of cell phone back light seat - Google Patents

Manufacturing method and the device of cell phone back light seat Download PDF

Info

Publication number
KR20110026890A
KR20110026890A KR1020090084731A KR20090084731A KR20110026890A KR 20110026890 A KR20110026890 A KR 20110026890A KR 1020090084731 A KR1020090084731 A KR 1020090084731A KR 20090084731 A KR20090084731 A KR 20090084731A KR 20110026890 A KR20110026890 A KR 20110026890A
Authority
KR
South Korea
Prior art keywords
sheet
light
base sheet
layer
adhesive
Prior art date
Application number
KR1020090084731A
Other languages
Korean (ko)
Inventor
권혁환
윤대식
Original Assignee
(주)엘케이테크
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 (주)엘케이테크 filed Critical (주)엘케이테크
Priority to KR1020090084731A priority Critical patent/KR20110026890A/en
Publication of KR20110026890A publication Critical patent/KR20110026890A/en

Links

Images

Classifications

    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
    • G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
    • G02B6/0065—Manufacturing aspects; Material aspects
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
    • G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
    • G02B6/0081—Mechanical or electrical aspects of the light guide and light source in the lighting device peculiar to the adaptation to planar light guides, e.g. concerning packaging
    • G02B6/0083—Details of electrical connections of light sources to drivers, circuit boards, or the like
    • 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

Abstract

PURPOSE: A method for manufacturing a backlight sheet of a mobile terminal is provided to guide light to a key pad without a loss by bonding a top sheet and a base sheet using a high permeable adhesive. CONSTITUTION: A method for manufacturing a backlight sheet of a mobile terminal comprises steps of: coating lower part of a transparent base sheet(100) with white material; placing a release paper on an adhesive layer after spreading adhesive on the upper surface of a coating layer; punching the base sheet in order to insert a lamp input part(122) and a fitting part(124); spreading adhesive on a lower part of a transparent top sheet(200); bonding the base sheet and the top sheet using a roller.

Description

Manufacturing method and sheet thereof for cell phone backlight {Manufacturing method and the device of cell phone back light seat}

The present invention relates to a cell phone sheet, and more particularly, a cell phone backlight that allows the top sheet and the base sheet to be laminated with a high-transparent adhesive to expand the passage through which light can pass and to irradiate the keypad without losing light. It relates to a method for producing a sheet for use and the sheet.

In addition, the present invention relates to a sheet for a cell phone backlight having an external layer on the bottom of the base sheet, for example, a printed layer which prevents the color of the substrate from being reflected on the sheet and prevents light from escaping to the outside.

In addition, the present invention relates to a backlight sheet for arranging light refracting portions of diamond and triangular shapes on the top sheet so that light of the LED lamp can be evenly distributed throughout the sheet.

In general, a mobile phone has a backlight function that enables identification of numbers, letters or symbols even at night.

The backlight function is a method of irradiating light to a keypad using an LED lamp. In the related art, an LED lamp is installed on an upper surface of a substrate to directly irradiate light on the keypad, but recently, light is irradiated using a waveguide sheet.

In other words, the conventional mobile phone installed the LED lamp on the upper surface of the substrate, and irradiated the light by placing a keypad printed with numbers, Korean consonants and the English alphabet on the upper surface of the LED lamp, but due to the number and thickness of the LED lamp There is a problem that it is difficult to realize slimming and miniaturization.

Recently, a waveguide or a sheet called LGP (light guide plate) is used depending on the manufacturer.

The waveguide sheet, which minimizes the loss of light by controlling the light path uniformly, can be backlit with only one LED lamp provided at the tip, resulting in miniaturization, slimness, and light weight of the product.

However, these waveguide sheets also have some problems.

Conventionally used waveguide sheet is a transparent film that gives a crack in the area where the number of the keypad is located, so that the light is refracted by the crack to be irradiated, the number of cracks increases as the distance from the LED lamp installed at the tip The depth is made up of a deeper configuration.

However, such a waveguide sheet has a problem of a great loss of light. In a transparent waveguide sheet, the light exits the top or bottom before reaching the crack, and even if the crack is reached, a large part of the light is already lost and the refractive index drops significantly.

In addition, the previous waveguide sheet has a problem that the transmittance of light is low because the thickness is limited. The waveguide sheet having a constant thickness has to be thin in order to make the product slim, and thus, it is difficult to pass all the light emitted from the LED lamp without loss.

Of course, there are examples of using two or more layers of waveguides stacked, but there is a fundamental problem in that light is trapped in the waveguide sheet.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-described conventional problems, and includes a base sheet and a top sheet, and a method for manufacturing a cell phone backlight sheet, in which these sheets are laminated with a high-transparent adhesive to extend a path through which light passes. To provide.

Another object of the present invention is to provide a base layer with a printing layer to prevent the light of the LED lamp from escaping to the outside and also to prevent the external colors from being reflected on the sheet so that the light is not blurred. A manufacturing method and its sheet are provided.

It is still another object of the present invention to provide a method for manufacturing a sheet for a backlight for a cell phone and a sheet having a light refracting portion so that light can be evenly distributed and irradiated throughout the sheet.

Still another object of the present invention is to provide an adhesive sheet on each of the base sheet and the top sheet to facilitate assembly and fabrication and to reduce the manufacturing cost.

The present invention is a sheet installed in the mobile phone to be refracted by the light of the LED lamp to the backlight is made, the coating step of coating the bottom surface of the transparent base sheet in white; Applying an adhesive to an upper surface of the coating layer and providing an adhesive layer on the adhesive; A base sheet punching step of drilling a dome fitting portion in which a lamp input portion in which an LED lamp is fitted and a dome switch are located on the base sheet; Applying an adhesive for lamination to the transparent top sheet bottom; A lamination step of laminating the base sheet and the top sheet through upper and lower rollers; Perforating a guide hole at both edges of the laminated sheet, and then perforating a light refraction portion and a lamp input portion into which the lamp is fitted in the top sheet based on the guide hole; And providing a cover layer covering the lamp cover on the upper surface of the lamp input unit.

In addition, the sheet of the present invention is a base sheet having a white coating layer on the bottom, the lamp input portion into which the LED lamp is fitted and the metal dome fitting portion provided with the metal dome, and the adhesive layer on the bottom of the coating layer; A top sheet laminated with the base sheet by an adhesive layer provided on a bottom surface, and having a character layer having the same shape as that of the keypad on the top surface, the top sheet having a light refraction portion for refracting the light of the LED lamp at the center and at the edge thereof; It is adhered to the top sheet, and wraps the upper portion of the LED lamp so that the light is irradiated to the side to be irradiated light through the light refraction portion; has a technical configuration consisting of.

The present invention is first, the top sheet and the base sheet is composed by bonding with a high-transparent adhesive, but by rolling the lamination without bubbles to allow a large amount of light to pass by allowing light to pass through the distinction between the top sheet and base sheet A passage can be secured.

Second, the present invention minimizes the loss of light by placing a print layer on the base sheet to trap the light inside the sheet, the print layer blocks the external color, for example, the substrate, such as the color of the external light By this is an invention that can prevent the phenomenon that the light of the LED lamp is blurred.

Third, the sheet of the present invention has a diamond-shaped and triangular light refracting portion so that the light irradiated from the LED lamp is refracted by the debt of these light refracting portion so that the light can be dispersed throughout the sheet.

Fourth, the sheet of the present invention is an invention that is excellent in workability at the time of assembly by having an adhesive layer, and the sheet can be laminated without bubbles.

Fifth, the sheet of the present invention can change the color of the printed layer to make the light of various colors to improve the quality of the product.

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

First, the attached Figure 1 is a perspective view of a sheet according to the present invention, Figure 2 is a plan view of the base sheet applied to the present invention, Figure 3 shows a plan view of the top sheet applied to the present invention.

4 is an enlarged view illustrating main parts of the present invention, and FIGS. 5A and 5B illustrate one side view showing the lamination process of the present invention.

In the drawing, the sheet 10 of the present invention implements a pattern and cuts it to suit a mobile phone, and is basically made of a transparent base sheet 100 and a top sheet 200.

Such a backlight sheet of the present invention comprises a coating step of coating a transparent base sheet bottom surface in white; Applying an adhesive to an upper surface of the coating layer and providing an adhesive layer on the adhesive; A base sheet punching step of drilling a dome fitting portion in which a lamp input portion in which an LED lamp is fitted and a dome switch are located on the base sheet; Applying an adhesive for lamination to the transparent top sheet bottom; A lamination step of laminating the base sheet and the top sheet through upper and lower rollers; Perforating a guide hole at both edges of the laminated sheet, and then perforating a light refraction portion and a lamp input portion into which the lamp is fitted in the top sheet based on the guide hole; And providing a cover layer covering the lamp cover on the upper surface of the lamp input unit.

Base sheet

The base sheet 100 has a pattern portion 120, an adhesive layer 140 and a coating layer 160 woven in accordance with the mobile phone.

The pattern unit 120 may vary in shape, size, and position according to the shape of a mobile phone. Basically, the pattern unit 120 includes a lamp input unit 122 and a metal dome fitting unit 124 in which an LED lamp is installed.

The lamp input unit 122 allows the LED lamp to be fitted thereto in a perforated form, and the metal dome fitting unit 124 contacts the bottom surface of the dome 126 by pressing a switch, that is, a character transmission or a call.

The coating layer 160 prevents the light of the LED lamp from escaping to the bottom of the sheet so that light is not lost, and when the cell phone is mounted on the mobile phone, the color of the substrate or the like located on the bottom of the sheet is reflected off the sheet. .

This is the main function of the present invention is to block the phenomenon that the light of the substrate is reflected on the sheet color.

The coating layer 160 is based on white, but may be painted in various forms such as red and green in some cases.

By changing the background, it is possible to diversify the quality of the product by adjusting the color of the light irradiated to the keypad, and can also be harmonized with the LED lamps of red, green, and white.

The adhesive layer 140 is applied prior to the perforation of the lamp input unit 122 and the metal dome fitting part 124, and is coated on the coating layer 160, and release paper (not shown) is applied to the adhesive layer 140. It is a provided configuration.

Top sheet

The top sheet 200 is composed of a transparent sheet.

The top sheet 200 is provided with a lamp cover layer 240 to cover the light refraction unit 220 and the upper surface of the LED lamp through the punching process by the press so that the light is refracted to the side.

The light refracting unit 220 that is cut or completely punched in the shape of a “V” groove increases the refractive index of the light, allows the light to be evenly distributed throughout the sheet, and improves the brightness of the lamp input unit 122. In the middle and at both edges, the light refracting portion 220 positioned in the middle is diamond-shaped and the edge is formed of a triangle.

Of course, the shape of the light refraction unit 200 may be in the form of letters, dots, square or refracted lines, or in the form of parentheses. However, in the present invention, the diamond shape and the triangle are basically used.

Here, the intermediate light refracting unit 220 has a diamond shape, as shown in FIG. 3, the light is irradiated from the upper and lower sides at the hypotenuse 220a so that the upper and lower parts of the light are uniformly irradiated. (220) Also, the hypotenuse is located inside to deflect the light.

The lamp cover layer 240 is made of a translucent or light-blocking material so that light is not directly irradiated to the keypad, and the light is irradiated toward the light refraction unit 220.

On the other hand, the top sheet 200 does not necessarily need to be transparent.

In other words, like the base sheet, a white coating layer may be placed on a portion other than the character layer 260 printed on the upper surface so that light may be irradiated to the character layer portion. Of course, in this case, it is natural that the area around the text becomes brighter.

The character layer 260 is formed in the same form as the keypad located above. In other words, numbers, Hangul consonants, vowels, and alphabets are also cut in the form of "V" so that light can be refracted, either through thermoforming or press work.

Another embodiment of the character layer 260 is to have a silk print layer.

Such silk printing is printed in a single color or color to maximize the light effect of light, and is printed on the upper surface of the top sheet after the above-mentioned thermoforming, pressing, laser or V-cutting.

Reference numeral 280 denotes an adhesive layer applied to the bottom of the top sheet.

This adhesive layer serves to allow the base sheet and the top sheet to be laminated without bubbles.

In the drawings, reference numeral 180 denotes a guide hole.

In another embodiment of the present invention, the sheet is embossed. The embossing is to scatter the light so that the light is evenly distributed throughout the sheet. The embossing is basically formed on the bottom of the base sheet 100, and the white coating layer 160 and the adhesive layer 140 are sequentially formed on the bottom of the embossing bottom. Configuration.

Of course, such embossing may be provided on the top or bottom surface of the top sheet 200, and is formed by thermoforming or spraying.

Next will be described the manufacturing process and the use state of the present invention made of such a configuration.

Fabrication of the backlight sheet of the present invention starts with coating treatment by applying white ink to the base sheet 100.

The white coating layer 160 is a hot coating or cool coating method is used, the adhesive is applied again thereon after the coating treatment.

Here, the adhesive layer 140 is to be fixed to the substrate of the mobile phone, the adhesive layer is provided with a release paper is used to remove it during work.

The base sheet 100 provided with a coating layer and an adhesive layer is subjected to a punching process in which a perforation is performed by thermoforming or pressing, and a dome in which a lamp input unit 122 and a dome switch in which an LED lamp is fitted are placed through the punching process. The fitting portion 124 is perforated.

The base sheet 100, which has undergone the punching process, is laminated with the top sheet 200, and the lamination process is performed without bubbles by using a pair of rollers as shown in FIG.

The adhesive used for the lamination is applied to the bottom surface of the top sheet 200 or the top surface of the base sheet, and a high transparency adhesive is used so that light does not occur between the base sheet 100 and the top sheet 200 after lamination so that light does not occur. Make it useful.

After the lamination process or the lamination process, the guide holes 180 are drilled at both edges of the base sheet 100 as shown in the drawing, and the guide holes 180 are in the correct positions without shaking when cutting the light refractions described later. Allow the seat to be secured to the

The perforating operation of the top sheet 200 made through the press work or the thermoforming or the cutting roll is carried out by mounting the sheet in a predetermined position, and the perforation is made around the guide hole 180.

On the other hand, the perforation made in the top sheet 200 is made of the light refracting portion 220 and the lamp fitting portion, after which the lamp cover layer 240 is bonded to the upper surface of the lamp fitting portion is completed the product.

In another process, a reflective film for reflecting light and a light shielding tape for preventing light loss may be attached to the top sheet upper surface of the sheet of the present invention.

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

2 is a plan view of a base sheet applied to the present invention,

3 is a plan view of a top sheet applied to the present invention,

4 is an enlarged cross-sectional view of the main portion of the present invention;

Figure 5a, b is one side view showing an example of the manufacturing process of the present invention.

* Explanation of symbols for the main parts of the drawings

10 sheet 100 base sheet

120: pattern layer 200: top sheet

220: light refraction

Claims (8)

It is installed on the cell phone and it is a sheet to make the backlight by refracting the light of the LED lamp. A coating step of coating the bottom of the transparent base sheet in white; Applying an adhesive to an upper surface of the coating layer and providing an adhesive layer on the adhesive; A base sheet punching step of drilling a dome fitting portion in which a lamp input portion in which an LED lamp is fitted and a dome switch are located on the base sheet; Applying an adhesive for lamination to the transparent top sheet bottom; A lamination step of laminating the base sheet and the top sheet through upper and lower rollers; Perforating a guide hole at both edges of the laminated sheet, and then perforating a light refraction portion and a lamp input portion into which the lamp is fitted in the top sheet based on the guide hole; And And a cover layer covering the lamp cover on the upper surface of the lamp input unit. The method of claim 1, wherein the light refracting portion provided in the top sheet is configured to be “V” cut through thermoforming or press work, and has a diamond shape and a triangular shape. It is a sheet installed in a mobile phone that allows the backlight of the LED lamp to be refracted. A base sheet having a white coating layer on a bottom surface of the base plate having a lamp input portion into which an LED lamp is fitted and a metal dome fitting portion provided with a metal dome, and having an adhesive layer on a bottom surface of the coating layer; A top sheet laminated with the base sheet by an adhesive layer provided on a bottom surface, and having a character layer having the same shape as that of the keypad on the top surface, the top sheet having a light refraction portion for refracting the light of the LED lamp at the center and at the edge thereof; And a lamp cover layer adhered to the top sheet and surrounding the top of the LED lamp so that light is irradiated to the side to be irradiated to irradiate the light through the light refraction unit. 4. The cell phone backlight sheet according to claim 3, wherein a top surface of the top sheet is provided with a high-transparent adhesive to prevent a boundary between the base sheet and the base sheet after lamination. The cell phone backlight of claim 3, wherein the light refraction unit is cut in a “V” shape, and is configured in a diamond shape and a triangular shape so that the light is refracted by the hypotenuse of each refraction part so as to be evenly distributed throughout. Sheet. According to claim 3, The top sheet is a cell phone backlight sheet, characterized in that the character layer consisting of the same number, the alphabet, Hangul consonants and vowels on the upper surface in the form of "V" cutting. 4. The mobile phone backlight of claim 3, wherein the top sheet and the bottom surface of the base sheet are selectively embossed to scatter light, and the base sheet has a coating layer and an adhesive layer on the bottom surface of the embossing treatment unit. Sheet. 7. The cell phone backlight sheet according to claim 6, wherein the character layer is silk-printed in the color after cutting the "V".
KR1020090084731A 2009-09-09 2009-09-09 Manufacturing method and the device of cell phone back light seat KR20110026890A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1020090084731A KR20110026890A (en) 2009-09-09 2009-09-09 Manufacturing method and the device of cell phone back light seat

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1020090084731A KR20110026890A (en) 2009-09-09 2009-09-09 Manufacturing method and the device of cell phone back light seat

Publications (1)

Publication Number Publication Date
KR20110026890A true KR20110026890A (en) 2011-03-16

Family

ID=43933791

Family Applications (1)

Application Number Title Priority Date Filing Date
KR1020090084731A KR20110026890A (en) 2009-09-09 2009-09-09 Manufacturing method and the device of cell phone back light seat

Country Status (1)

Country Link
KR (1) KR20110026890A (en)

Similar Documents

Publication Publication Date Title
KR200438645Y1 (en) A conversional keypad package using light guiding sheets
JP2022183168A (en) Keycaps having reduced thickness
JP4195034B2 (en) Mobile device key
KR20160061408A (en) Keycaps with reduced thickness
CN107111975A (en) Printed article
KR20070046179A (en) Key sheet and key top with half-silvered mirror decoration
JP2009224314A (en) Planar light guide and electronic apparatus
CA2752006A1 (en) Light guide plate structure and method of fabricating the same
JP2008130506A (en) Key base, key-sheet including the same, and key unit including the same
JP2014077821A (en) Decorative laminated body, display device, and decorative lamination method
KR101330937B1 (en) A method manufacturing a back lighting structure of a mobile terminal, a back lighting structure of a mobile terminal and a mobile terminal having a back lighting structure
KR20110026890A (en) Manufacturing method and the device of cell phone back light seat
KR100588773B1 (en) Wireless telephone keypad and the method
US8338729B2 (en) Keypad apparatus for electronic device
KR20060090784A (en) The assembly of key printed-circuit board or key flexible printed-circuit board that use plastic optical sheet that improve light leakage prevention
KR20090102202A (en) Method for manufacturing keypad package, the keypad package manufactured by method thereof and keypad for mobile phone used with the keypad package
JP4910056B2 (en) Seat with contact spring and switch device
CN102592872A (en) Apparatus and method for a user input element in an electronic device
CN105408778A (en) Method for producing laminate, laminate, light guide body for light source devices, and light source device
CN102714104B (en) Switch module
JP2018005063A (en) Keytop and keyboard
KR20100132165A (en) Dome waveguid sheet
TWM413951U (en) Keypad structure
KR101231375B1 (en) Light-guiding sheet, sheet equipped with contact spring, and switch device
US20220075261A1 (en) Light panel display

Legal Events

Date Code Title Description
A201 Request for examination
E902 Notification of reason for refusal
E701 Decision to grant or registration of patent right
NORF Unpaid initial registration fee