KR20150142537A - Method for manufacturing touch key assembly and light indicator assembly for mobile device - Google Patents

Abstract

In the present invention, disclosed is a method for manufacturing a touch key assembly and a light indicator assembly for a mobile device. In the touch key assembly according to the present invention, a first base sheet including multiple reflective sheets and multiple opaque base plates stacked on an upper face is laminated. A second base sheet including multiple separable light guide plates is laminated on the upper face of the reflective sheets. The light guide plates are separated from the second base sheet and are attached to the upper face of the reflective sheets, and then the second base sheet is removed. A third base sheet including multiple opaque frames is laminated on the upper face of the light guide plates and the opaque frames are separated from the third base sheet such that the opaque frames accommodate the reflective sheets and the light guide plates, respectively. The opaque frames are attached to the upper face of the opaque base plates and an optical waveguide film is removed. A transparent window accommodated in the opaque frames, a touch key pattern formed to be adjacent to the transparent window and a printed circuit board including a light source accommodated in the opaque frames are attached to the opaque frames, respectively, and the third base sheet is removed. According to the present invention, it is possible to prevent a light leakage phenomenon by the opaque frames surrounding the light source and the base plates. In addition, by a simple lamination method of the frames, the base plates, the reflective sheets, and the light guide plates, it is possible to improve productivity, and it is possible to reduce production costs.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a touch key assembly and a light indicator assembly for a mobile device,

The present invention relates to a mobile device, and more particularly, to a touch key assembly and a light indicator for a mobile device capable of preventing light leakage properties of a touch key assembly including a light indicator assembly by a simple lamination structure To a method of manufacturing an assembly.

A user interface of various mobile devices such as a smart phone, a tablet computer, a personal digital assistant (PDA), a portable multimedia player (PMP) Or a touch button (touch button), a touch pad button (touch pad button), and a touch screen (touch screen). It is important that the user interface of such a mobile device is easy to use and designed so that the user can easily recognize and use the function. For example, Galaxy series.RTM. (Samsung Electronics Co., Ltd.) and tablet computer (Galaxy Tab.RTM., Samsung Electronics Co., Ltd.) as a smartphone are equipped with a home key button, a back key, a menu key, and a search key.

"Touch key assembly for a mobile terminal" of U.S. Patent Nos. 7,825,907 and 8,049,728 discloses a light source, an optical waveguide for visually displaying the operating state of a touch key, A reflector element, and a light guide assembly. As a light source, a light emitting diode (LED) is mounted in a separate recess of an optical waveguide. The reflection element is attached to the lower surface of the optical waveguide. The light guide is mounted on the touchpad to align with the touch key. An optional light disturbing element is formed on the lower surface of the optical waveguide so that the light of the LED is reflected toward the light guide. The light of the LED is displayed in front of the body through the optical waveguide and the light guide. However, since the touch key assembly of the mobile terminal of this patent document has to be manufactured by thickening the optical waveguide due to the structure in which the LED is immersed in the separate recess of the optical waveguide, the touch key assembly is greatly affected by the thinness of the mobile terminal have. In addition, there is a disadvantage in that the configuration is complicated and the production cost is increased because the separate recess and the selective optical interference element are formed in the optical waveguide.

Korean Patent Registration No. 10-1324591 entitled " Method for manufacturing a home key of a portable terminal "includes a home key, a menu key and a back key in a flexible printed circuit board (Flexible PCB) In this touch key assembly, the light indicator assembly for visually displaying the operation state of the menu key and the back key includes a thin optical waveguide attached to the surface of the flexible PCB, and a light guiding plate disposed on the flexible PCB so as to be adjacent to one side of the optical waveguide And an edge light type having an LED. In addition, the light indicator assembly applied to the touch key assembly is an impermeable adhesive tape in which a light-passing window is formed in order to prevent the leakage of the light of the LED out of the LED, It is wrapping the PCB. However, the taping of the impermeable adhesive tape is performed by the manual operation of the operator, so that the productivity is low and the production cost is high. In addition, the edge of the adhesive tape is easily lifted from the flexible PCB to generate a gap, and a light leakage phenomenon occurs due to the gap, thereby deteriorating the quality of the mobile device.

The present invention is intended to solve various problems of the conventional touch key assembly for a mobile device. It is an object of the present invention to provide a new touch key assembly and a method of manufacturing a light indicator assembly for a mobile device capable of preventing light leakage by a laminated structure.

It is another object of the present invention to provide a touch key assembly for a mobile device and a method of manufacturing a light indicator assembly that can increase productivity by simple lamination and can greatly reduce the production cost.

According to an aspect of the invention, a method of manufacturing a touch key assembly for a mobile device is provided. A method of manufacturing a touch key assembly for a mobile device according to the present invention includes the steps of disposing a first base sheet having a plurality of opaque base plates and a plurality of reflective sheets stacked on an upper surface thereof; Stacking a second base sheet having a plurality of light guide plates which can be separated on the upper surface of the plurality of reflective sheets; Separating the plurality of light guide plates from the second base sheet and attaching them to the upper surface of the plurality of reflective sheets, and then removing the second base sheet; Stacking a third base sheet having a plurality of opaque rims on the upper surface of the plurality of light guide plates; Separating the plurality of opaque rims from the third base sheet so as to accommodate each of the plurality of reflective sheets and the plurality of light guide plates, attaching the plurality of opaque rims to the upper surface of the plurality of impervious base plates, and removing the optical waveguide film Wow; A plurality of light guide plates disposed on one side of the light guide plate, and a light source accommodated in a plurality of opaque edges, the plurality of light guide plates including a plurality of light guide plates disposed in a plurality of opaque rims, Attaching each to an impermeable rim; And removing the third base sheet.

A method of manufacturing a light indicator assembly for a mobile device according to another aspect of the present invention includes the steps of disposing a first base sheet having a plurality of laminated opaque base plates and a plurality of reflective sheets; Stacking a second base sheet having a plurality of light guide plates which can be separated on the upper surface of the plurality of reflective sheets; Separating the plurality of light guide plates so as to guide light from the light source from the second base sheet, respectively attaching the light guide plate to the upper surface of the plurality of reflective sheets, and then removing the second base sheet; Stacking a third base sheet having a plurality of opaque rims on the upper surface of the plurality of light guide plates; Separating a plurality of opaque rims from the third base sheet and attaching each of the plurality of reflective sheets, the plurality of light guide plates, and the light sources respectively to the upper surface of the plurality of opaque base plates; And removing the third base sheet.

The method of manufacturing a touch key assembly and a light indicator assembly for a mobile device according to the present invention can prevent a light leakage phenomenon due to an impermeable frame surrounding a light source and a bottom plate, It can be manufactured by the lamination method to increase the productivity, and there is a very useful effect of reducing the production cost.

1 is a front view illustrating a configuration of a smartphone to which a touch key assembly for a mobile device according to the present invention is applied.
2 is a perspective view illustrating a configuration of a touch key assembly according to the present invention.
3 is a sectional view taken along the line III-III in Fig.
Fig. 4 is a perspective view showing a configuration in which a band is developed in Fig. 2;
5 is a perspective view illustrating the structure of a touch key assembly according to the present invention.
6 is a perspective view illustrating a configuration of a light guide plate in a touch key assembly according to the present invention.
FIG. 7 is a perspective view illustrating a configuration in which a light guide plate of another embodiment is applied to the touch key assembly according to the present invention.
8 is a perspective view showing a configuration of a light indicator assembly according to the present invention.
9 is a perspective view showing two strips separated in FIG.
10 is a sectional view taken along the line X-X in Fig.
11 is a perspective view illustrating a jig and a first base sheet to illustrate a method of manufacturing the light indicator assembly according to the present invention.
12 is a perspective view illustrating the construction of an optical waveguide film and a second base sheet for explaining a manufacturing method of a light guide plate in a light indicator assembly according to the present invention.
13 is a partially sectional view for explaining a manufacturing method of a light guide plate in a light indicator assembly according to the present invention.
FIG. 14 is a perspective view illustrating a second base sheet having a jig, a first base sheet, a guide sheet, and a light guide plate attached thereto to explain a method of manufacturing the light indicator assembly according to the present invention.
15 is a sectional view partially showing the first base sheet, the guide sheet and the second base sheet in Fig.
16 is a perspective view illustrating a jig, a first base sheet, and a third base sheet having a frame to explain a method of manufacturing the light indicator assembly according to the present invention.
17 is a perspective view partially showing the rim and the third base sheet in Fig.
18 is a cross-sectional view taken along line XVIII-XVIII of Fig.
19 is a perspective view illustrating a jig, a PCB, and a strip to illustrate a method of manufacturing the ride indicator assembly according to the present invention.

Other objects, specific advantages and novel features of the present invention will become more apparent from the following detailed description and preferred embodiments with reference to the accompanying drawings.

Hereinafter, preferred embodiments of a method of manufacturing a touch key assembly and a light indicator assembly for a mobile device according to the present invention will be described in detail with reference to the accompanying drawings.

1 to 4, a touch key assembly 100 for a mobile device according to the present invention includes a printed circuit board (PCB) 110 embedded in a smartphone 10. The PCB 110 is composed of a flexible PCB rigid PCB 112 and rigid PCBs 114a and 114b. The PCB 110 is symmetrically configured with a letter "L". The rigid PCBs 114a and 114b are attached to both sides of the upper surface of the flexible PCB 112. In some embodiments, the PCB 112 may consist solely of a flexible PCB 112. Also, although it has been shown and described that two rigid PCBs 114a, 114b are attached to the flexible PCB 112, the number and location of the rigid PCBs 114a, 114b may be varied as appropriate.

A transmissive window 112a is formed in the flexible PCB 112. The transmission window 112a is formed by removing the flexible PCB 112 in a rectangular shape. 1 and 2 illustrate that two transmission windows 112a are formed on both sides of the flexible PCB 112 for the construction of two touch keys. A touch key pattern 112b for the configuration of the touch key is formed on the flexible PCB 112 around the transmission window 112a. For example, with the smartphone 10, the Galaxy series has two touch keys. Two touch keys are formed adjacent to both ends of the flexible PCB 112. One of the two touch keys may be used as the back key 12 and the other may be used as the menu key 14. [ The transmissive window 112a and the touch key pattern 112b are formed on the touch key constituent part 112d connected to each other by a band 112c which is collapsible from the adjacent parts on both sides of the flexible PCB 112 . In some embodiments, the transmission window 112a and the touch key pattern 112b may be formed at both ends of the flexible PCB 112. [ In this case, the band 112c and the touch key constituent part 112d are deleted. A switch 116 is formed on the upper surface of the rigid PCB 114a. The switch 116 may be used as the home key 16 of the smartphone 10. A connector 118 is attached to one end of the rigid PCB 114b. The connector 118 is connected to the PCB 18 of the smartphone 10. In general, the back key 12, the menu key 14, and the home key 16 are formed at the lower end of the touch screen 20.

3 and 5, the touch key assembly 100 for a mobile device according to the present invention includes a light source 120 for generating light in order to visually display an operation state of the touch key pattern 112b. The light source 120 is mounted on the lower surface of the flexible PCB 112, that is, the touch key constituent part 112d so as to be adjacent to the transmission window 112a. The light source 120 may include an LED 122 and a vertical surface emitting laser.

An impermeable border 130 is attached to the underside of the flexible PCB 112 so as to completely surround the transparent window 112a and the LED 122. [ The rim 130 is formed to receive the transmission window 112a and the LED 122 and has a transmission window 132 disposed below the transmission window 112a. The transmission window 132 is formed by removing a part of the rim 130 in a rectangular shape. The upper surface of the rim 130 is bonded to the lower surface of the flexible PCB 112 by an adhesive layer 134. The frame 130 may be a double coated adhesive tape such as a double coated polyethylene foam tape (RTM), a 3M Company, or a double coated polyurethane foam tape (RTM, 3M Company) tape, black plastic, rubber, and the like. The polyurethane foam tape is available from PORON (trade name). The black plastic can be produced by injection molding, for example, by blending a black pigment with a material such as polycarbonate (PC) or acrylic. As the black pigment, for example, carbon black may be used.

An impermeable bottom board 140 is attached to the lower surface of the rim 130 so as to completely cover the transmission window 132. The upper surface of the base plate 140 is bonded to the lower surface of the rim 130 by the adhesive layer 142. The base plate 140 may be made of black plastic, polyurethane foam tape. Preferably, the base plate 140 is made of black plastic. The base plate 140 of the black plastic may be thinned to a thickness of about 0.1 mm or less by injection molding. The base plate 140 of the black plastic can be manufactured by attaching an adhesive tape to both sides of polyethylene terephthalate (PET), for example. The lower surface of the impermeable base plate 140 is bonded to the upper surface of each of the rigid PCBs 114a and 114b by the adhesive layer 144 in a state in which the band 112c is folded. The adhesive layer 144 may be composed of a double-sided adhesive tape.

A reflection sheet 150 is attached to the upper surface of the bottom plate 140. The reflective sheet 150 is bonded to the upper surface of the base plate 140 by the adhesive layer 142. The adhesive layer 142 may be coated on the entire upper surface of the bottom plate 140. The adhesive layer 152 is coated on the upper surface of the reflective sheet 150. The reflective sheet 150 may be formed in the form of a double-sided tape having an adhesive layer coated on the upper and lower surfaces thereof. The reflective sheet 150 may be made of PET.

A light guide plate 160 is attached to the upper surface of the reflective sheet 150 to receive the light from the LED 122 and emit the light to the transmission window 112a. The light guide plate 160 is exposed through the transmissive window 132 of the frame 130 and the transmissive window 112a of the flexible PCB 112. One side 162 of the light guide plate 160 is disposed within the rim 130 so as to be adjacent to the LED 122. The lower surface of the light guide plate 160 is bonded to the upper surface of the reflective sheet 150 by the adhesive layer 152. The light guide plate 160 may be made of polymethyl methacrylate (PMMA). In some embodiments, the reflective sheet 150 may be configured as a double-sided tape for joining the bottom plate 140 and the light guide plate 160.

Referring to FIGS. 5, 6, and 10, a user interface symbol 170 or an icon is formed on the lower surface of the light guide plate 160. The user interface symbol 170 is printed by light diffusion ink. Printing of the user interface symbol 170 may be performed by gravure printing, silk screen printing, offset lithography printing, or the like. The user interface symbol 170 shown in FIG. 6 (a) represents the backkey symbol 172. The user interface symbol 170 shown in FIG. 6 (b) represents the menu key symbol 174. This user interface symbol 170 has the function of a scattering pattern that scatters the light of the LED 122.

6, the user interface symbol 170 is formed of a stripe pattern 176 parallel to the optical axis 124 of the LED 122. The stripe pattern 176 is composed of a plurality of stripes 176b arranged at intervals relative to each other so as to have a plurality of optical paths 176a arranged along the optical axis 124. [ That is, the user interface symbol 170 forms stripes 176b at intervals along the optical axis 124 by printing a light diffusion ink. The light of the LED 122 is reflected along the optical path 176a to make the brightness uniform. On the other hand, when the entire area of the user interface symbol is formed by printing of the light diffusion ink without securing the optical path, the brightness of the user interface symbol becomes lower than the upper surface of the light guide plate 160 where the light diffusion ink is not printed do.

A light diffusion film 178 is formed on the light guide plate 160 opposite to the one side surface 162 by printing of the light diffusion ink to increase the uniformity of brightness, As shown in Fig. The light diffusion film 178 is formed in a band shape having a constant width along a direction orthogonal to the optical axis 124 and is spaced apart from the user interface symbol 170. The light from the LED 122 is diffused by the light diffusion film 178 to brighten the surroundings, thereby making the brightness of the light guide plate 160 uniform.

Referring to FIG. 6 again, the impermeable film 180 is formed in the shape of a band having a constant width along the top edge of the light guide plate 160. The impermeable film 180 is printed by impermeable ink, for example Black ink. The impermeable film 180 is printed on the lower surface adjacent to one side 162 of the light guide plate 160. The hot spot refers to a phenomenon that the periphery of the LED 122 appears brighter than the surrounding area. Such a hot spot may be generated at the edge of the light guide plate 160 adjacent to the LED 122. The impermeable film 180 blocks the transmission of light through the upper surface of the light guide plate 160 adjacent to one side 162 of the LED 122 on which light is incident, thereby preventing hot spots. The user interface symbol 170, the light diffusion film 178 and the impermeable film 180 are printed on the lower surface of the light guide plate 160, so that the light guide plate 160 can be made thinner than the light guide plate 160 described above.

7 shows another embodiment of a light guide plate in a touch key assembly for a mobile device according to the present invention. Referring to FIG. 7, a dot pattern (dot pattern) 182 may be patterned on the lower surface of the light guide plate 160 by a scattering pattern that scatters light of the LED 122. In this case, the user interface symbol 170 shown in FIG. 6 is printed on the lower surface of the glass constituting the touch screen 20. The dot pattern 182 scatters the light of the LED 122 and emits it to the upper surface of the light guide plate 160. The dot pattern 182 may be formed by laser processing. In some embodiments, the dot pattern 182 may be formed on the bottom surface of the light guide plate 160 by inkjet printing, imprinting, or the like. The dot pattern 182 may be formed on the lower surface of the light guide plate 160 by coining. Meanwhile, the light guide plate 160 may be formed of a polymer scattering type light guide plate in which a polymer scattering light is scattered.

2, 3 and 5, the touch key assembly 100 for a mobile device according to the present invention is attached to the upper surface of the touch key constituent part 112d for reinforcement of the touch key constituent part 112d And further includes a stiffening plate 190. A transmission window 192 is formed in the reinforcing plate 190 to receive the transmission window 112a. The reinforcing plate 190 may be composed of a single-sided adhesive tape.

1 and 3, when the user presses the back key 12 or the menu key 14 of the smartphone 10, the touch key pattern 112b and the LED 122 are operated. The light from the LED 122 is incident on the light guide plate 160 through one side surface 162 of the light guide plate 160. The light guide plate 160 guides the light of the LED 122 to the transmission window 132 of the frame 130, the transmission window 112a of the flexible PCB 112 and the transmission window 192 of the reinforcing plate 190, (12) or the menu key (14). Thus, the user can easily identify the operating state of the back key 12 or the menu key 14. [ Meanwhile, since the light of the LED 122 is completely blocked by the impermeable rim 130 and the bottom plate 140, the light leakage phenomenon is prevented, so that the reliability of the mobile device can be improved.

8-10, a touch key assembly 100 for a mobile device in accordance with the present invention may be manufactured using the light indicator assembly 200. Referring to FIG. The light indicator assembly 200 includes a plurality of opaque rims 130, a plurality of impermeable base plates 140, a plurality of reflective sheets 150, and a plurality of light guide plates 160 for the structure of the touch key assembly 100 In the form of a sheet or film laminate.

The light indicator assembly 200 includes a plurality of opaque rims 130, a plurality of impermeable base plates 140, a plurality of reflective sheets 150, and a plurality of light guide plates 160, : 210). The first base sheet 210 may be made of PC, polyethylene (PE), PET, polypropylene (PP), or the like.

The impermeable base plates 140 are bonded to the upper surface of the first base sheet 210 by the adhesive layer 212. In the present embodiment, the bottom plates 140 are formed of a rectangular plate having a width of about 9 mm and a length of about 6 mm. The base plates 140 are arranged obliquely along the diagonal direction of the first base sheet 210 to increase the area availability of the first base sheet 210. 8 illustrate that the light guide plates 160 are arranged on the upper surface of the first base sheet 210 in a matrix of 5 to 10 columns. However, the number of the light guide plates 160 may be increased or decreased as necessary have.

Each of the opaque rims 130 is bonded to the upper surface of the base 140 by an adhesive layer 142. The reflective sheets 150 are bonded to the upper surfaces of the base plates 140 by adhesive layers 142, respectively. The base plates 140 may be formed in the same shape as a double-sided tape having an adhesive layer coated on the lower and upper surfaces, respectively. Each of the plurality of light guide plates 160 is attached to the upper surface of each of the reflective sheets 150 by the adhesive layer 152. Each of the reflective sheets 150 and the light guide plate 160 is accommodated in the transmission window 132 so that the edge thereof is completely surrounded by the rims 130. [

The first base sheet 210 includes a plurality of strips 216 having a narrow width and a long length by a plurality of horizontal cutting lines 214a and a pair of vertical cutting lines 214b, And scrap (Scrap: 218). The horizontal cutting lines 214a are formed to be parallel to each other along the width direction. The vertical cutting lines 214b are formed along the longitudinal direction to connect both ends of the horizontal cutting lines 214a. The scraps 218 surround the perimeter of the strips 216. A plurality of locator pin holes 220 are formed in the strips 216. A plurality of locator pin holes 222 are formed at both edges of the scrap 218.

Five base plates 140 and five reflective sheets 150 are stacked on one strip 216 at intervals. In this embodiment, the bottom plates 140 attached to the odd-numbered first strips 216a of the strips 216 may be used to fabricate the menu key 14. [ The bottom plates 140 attached to the second strips 216b of the even-numbered strips 216 may be used to fabricate the back- A first marker 224 is formed in the first strips 216a such that one square hole 224a is adjacent to one side of the bottom plate 140. [ The second markers 226 are formed in the second strips 216b such that a pair of square holes 226a are adjacent to both sides of the bottom plate 140. [ The first marker 224 and the second marker 226 are used for the manufacture of the back key 12 and the menu key 14.

A release film 230 is attached to the lower surface of the first base sheet 210. The adhesive layer 232 is coated on the upper surface of the release film 230. [ The release film 230 maintains the shape of the strips 216 and the scrap 216 that are bonded to the lower surface of the first base sheet 210 by the adhesive layer 232. A protection film 260 is attached to the upper surface of the first base sheet 210 to protect the light guide plate 160.

Hereinafter, a manufacturing method of a light indicator assembly for mobile according to the present invention will be described.

Referring to FIG. 11, a jig 270 is used to manufacture the light indicator assembly 110 by a lamination method. The jig 270 is composed of a flat plate 272 and a plurality of locator pins 274 coupled to the upper surface of the plate 272. The operator inserts the locator pin holes 220 of the first base sheet 210 into the locator pins 274 to form a plurality of impervious base plates 140 and a plurality of reflective sheets 150, 210 are disposed on the upper surface of the jig 270.

Referring to FIGS. 12 and 13, the light guide plates 160 are manufactured by processing the optical waveguide film 240. The light guiding plates 160 are half-blanked or bridge-cut in an optical waveguide film 240 in a matrix of 5 to 10 columns. The outline of each of the light guide plates 160 is determined by a cutting line 242 formed by half blanking or bridge cutting. Each of the light guide plates 160 can be easily separated from the optical waveguide film 240 by the cut line 242 and attached to the reflection sheet 150. [ Each of the light guide plates 160 is embossed so as to protrude from the upper surface of the optical waveguide film 240. The operator can easily press each of the light guide plates 160 protruding from the upper surface of the optical waveguide film 240 by embossing to easily separate them from the optical waveguide film 240.

The second base sheet 244 is used to easily attach each of the light guide plates 160 to the upper surface of each of the reflective sheets 150 in the manufacturing method of the light indicator assembly for mobile according to the present invention. The operator prints the plurality of user interface symbols 170 on one side of the optical waveguide film 240 before cutting the optical waveguide film 240 and then attaches the second base sheet 244 by the adhesive layer 246 Is bonded to one surface of the optical waveguide film (240). The second base sheet 244 may be composed of a single-sided pressure-sensitive adhesive sheet.

The worker attaches the second base sheet 244 to the optical waveguide film 240, and then cuts the light guide plates 160. When the operator separates the optical waveguide film 240 from the second base sheet 244 after cutting the light guide plates 160, the light guide plates 160 remain on the second base sheet 244. A plurality of locator pin holes 248 are formed on both sides of the second base sheet 244. Locator pin holes 244 of the second base seat 244 are formed to align with the locator pin holes 220 of the first base seat 210.

14 and 15, an operator may mount a guide sheet 280 on the upper surface of the first base sheet 210, separate the light guide plates 160 from the second base sheet 244, And adheres to the upper surface of the sheet 150. A plurality of guide holes 282 are formed in the guide sheet 280 so as to be aligned with the reflective sheets 150. The guide holes 282 are formed in such a size that the light guide plates 160 can pass through. A plurality of locator pin holes 284 are formed on both sides of the guide sheet 280. The guide sheet 280 may be composed of PC, PE, PET, PP, or the like.

The operator sequentially fits the locator pin holes 284 of the guide seat 280 and the locator pin holes 248 of the second base seat 244 to the locator pins 274 so that the top surface of the first base sheet 210 The second base sheet 244 is sequentially stacked with the guide sheet 280 and the light guide plate 160 facing downward. When the operator presses the light guide plates 160, each of the light guide plates 160 passes through the guide holes 282 and is bonded to the upper surface of the reflection sheets 150 by the adhesive layer 152. The operator removes the second base sheet 244 and the guide sheet 280 from the first base sheet 210 after bonding the light guide plates 160 together.

The operator may attach the optical waveguide film 240 to the reflective sheets 150 after the optical waveguide film 240 is laminated on the first base sheet 210 and then the optical waveguide films 240 are separated from the optical waveguide film 240. At this time, the optical waveguide film 240 may not be easily attached to the adhesive layer 142 of the base plates 140 to detach the optical waveguide film 240 from the first base sheet 210. The guide sheet 280 is interposed between the first base sheet 210 and the optical waveguide film 240 to allow the light guide plates 160 to pass through the guide holes 282 to be bonded to the adhesive layer 142, (240) is not directly bonded to the adhesive layer (142). Therefore, the optical waveguide film 240 can be easily separated from the first base sheet 210.

Referring to FIGS. 16 to 18, the opaque rims 130 are affixed to the lower surface of the third base sheet 250 by the adhesive layer 134 in a matrix of 5 to 10 columns. A plurality of windows 252 are formed in the third base sheet 250. A plurality of recesses 254 are formed in the lower surface of the third base sheet 250. Each of the rims 130 is seated in recesses 254. A plurality of locator pin holes (256) are formed on both sides of the third base sheet (250). The locator pin holes 254 of the third base sheet 250 are formed to align with the locator pin holes 254 of the optical waveguide film 240. The second and third base sheets 244 and 250 and the protective film 260 may be made of PC, PE, PET, PP, or the like.

The operator inserts the locator pin holes 254 of the third base sheet 250 into the locator pins 272 so that the impermeable rim 130 faces downward. The operator presses and joins the edges 130 to the adhesive layer 142, and then removes the third base sheet 250 from the first base sheet 210 and removes it. The rims 130 are joined to the upper surface of the base plates 140 to completely enclose the light guide plates 160 and block them. Subsequently, the operator removes the first base sheet 210, and then attaches the protective film 260 to the upper surface of the first base sheet 210 to protect the light guide plates 160. Finally, the operator separates the light indicator assembly 200 from the jig 270 and uses it to manufacture the touch key assembly 100.

A method of manufacturing the touch key assembly by the light indicator assembly for mobile according to the present invention will be described.

Referring to FIG. 19, a jig 290 is used to manufacture the touch key assembly 100 by a lamination method. The jig 290 is comprised of a flat plate 292, a plurality of locator pins 294 coupled to the top surface of the plate 292 and a plurality of locator pins 296 protruding from the top surface of the plate 292 . Locator pins 294 are used for setting the first and second strips 216a and 216b that lie on the top surface of the plate 282. [ Locator pins 296 are used to set the PCBs 110 that lie on the top surface of the plate 282. [

The operator places the five PCBs 110 on the top surface of the plate 282 to be turned over and locked by the locator pins 296. [ The operator removes the protective film 260 from the first base sheet 210 to remove the protective film 260 for the structure of the touch key assembly 100 and then removes the first and second strips 216a and 216b, 216b are separated from the release film 230 so as to form a pair. The operator inserts the locator pin holes 220 of each of the first and second strips 216a and 216b into the locator pins 292 of the jig 290 to form first and second strips 216a, 216b.

Subsequently, the operator joins each of the opaque rims 130 to the touch key constituent portion 112d by the adhesive layer 134. [ At this time, the operator places the frames 130 on the flexible PCB (not shown) so that each of the frames 130 surrounds the transmission window 112a and the LED 122 and the LED 122 faces the one side 162 of the light guide plate 160 112). The operator attaches each of the borders 130 to each of the rims 130 and then separates and removes the first and second strips 216a and 216b and separates the PCB 110 from the jig 290. Finally, the operator folds the band 112c and bonds the base plates 140 to the rigid PCBs 114a, 114b with the adhesive layer 144. [

The edges 140, the bottom plates 140, the reflective sheets 150 and the light guide plates 160 are attached to the first and second strips 216a and 216b in a stacked manner, The touch panel assembly 100 can be easily assembled by separating the base plates 140 from the first and second strips 216a and 216b after attaching the touch panel assembly 100 to each of the flexible PCBs 112. [ In addition, since the frame 130, the bottom plates 140, the reflective sheets 150, and the light guide plate 160 can be easily attached to the flexible PCBs 112 in a stacked state, And productivity can be greatly improved.

While the present invention has been described in connection with what is presently considered to be practical exemplary embodiments, it is to be understood that the invention is not limited to the disclosed embodiments, but, on the contrary, It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.

100: Touch key assembly 110: PCB
112: Flexible PCB 112a: Transmission window
112b: Touch key pattern 114a, 114b: Rigid PCB
120: light source 122: LED
130: Impermeable rim 132: Transmission window
140: Impermeable base plate 150: Reflective sheet
160: light guide plate 170: user interface symbol
176: stripe pattern 178: light diffusion film
180: Impermeable film 182: Dot pattern
200: light indicator assembly 210: first base sheet
216: strip 230: release film
240: optical waveguide film 244: second base sheet
250: third base sheet 260: protective film
270, 290: jig 280: guide sheet

Claims (11)

Disposing a first base sheet having a plurality of opaque base plates and a plurality of reflective sheets stacked on an upper surface thereof;
Stacking a second base sheet having a plurality of light guide plates that can be separated on the upper surface of the plurality of reflective sheets;
Separating the plurality of light guide plates from the second base sheet, attaching the light guide plate to the upper surface of the plurality of reflective sheets, and removing the second base sheet;
Stacking a third base sheet having a plurality of opaque rims on the upper surface of the plurality of light guide plates;
Wherein the plurality of opaque rims separate the plurality of opaque rims from the third base sheet so as to receive the plurality of reflective sheets and the plurality of light guide plates and attach the plurality of opaque rims to the upper surface of the plurality of opaque base plates, Removing the optical waveguide film;
And a light source accommodated in the plurality of opaque rims, a touch key pattern formed adjacent to the transmissive window, and a light source disposed in one of the plurality of light guide plates and accommodated in the plurality of opaque rims, Attaching a substrate to each of the plurality of opaque rims;
And removing the third base sheet. ≪ RTI ID = 0.0 > 11. < / RTI > The method according to claim 1,
Attaching a release film to a lower surface of the first base sheet before placing the first base sheet;
Further comprising cutting the first base sheet into a plurality of strips spaced apart from the plurality of impervious base plates and the plurality of reflective sheets,
Wherein the plurality of opaque rims separate the plurality of strips from the release film and then attach the strips to the printed circuit board. 3. The method according to claim 1 or 2,
Stacking a guide sheet having a plurality of guide holes through which the plurality of light guide plates can pass, on a top surface of the first base sheet before stacking the second base sheet;
Further comprising the step of attaching each of the plurality of light guide plates to each of the plurality of reflective sheets through the plurality of guide holes and then removing the second base sheet and the guide film . 3. The method according to claim 1 or 2,
Printing a plurality of user interface symbols on one side of the optical waveguide film with a light diffusion ink prior to laminating the second base sheet;
Attaching the second base sheet to one surface of the optical waveguide film;
Forming the plurality of light guide plates by cutting the optical waveguide film so that the plurality of user interface symbols are included;
Further comprising the step of removing the optical waveguide film from the second base sheet so that the plurality of light guide plates are attached to the second base sheet,
Further printing a stripe pattern parallel to an optical axis of the light source such that a plurality of optical paths arranged along an optical axis of the light source are formed in printing the user interface symbol. 5. The method of claim 4,
Printing a light diffusion film on the lower surface of the light guide plate opposite to the light source along a direction orthogonal to the optical axis of the light source so as to be spaced apart from the interface symbol;
Further comprising the step of printing the impermeable film on the edge of one side of the light guide plate adjacent to the light source by the impermeable ink. Disposing a first base sheet having a plurality of laminated impermeable base plates and a plurality of reflective sheets;
Stacking a second base sheet having a plurality of light guide plates that can be separated on the upper surface of the plurality of reflective sheets;
Separating the plurality of light guide plates so as to guide light from the light source from the second base sheet, attaching the light guide plates to the upper surface of the plurality of reflective sheets, and removing the second base sheet;
Stacking a third base sheet having a plurality of opaque rims on the upper surface of the plurality of light guide plates;
Separating the plurality of opaque rims from the third base sheet and attaching each of the plurality of reflective sheets, the plurality of light guide plates, and the light sources respectively to the upper surface of the plurality of opaque base plates;
And removing said third base sheet. ≪ Desc / Clms Page number 22 > The method according to claim 6,
Attaching a release film to a lower surface of the first base sheet before placing the first base sheet;
Further comprising cutting the first base sheet into a plurality of strips spaced apart from the plurality of impervious base plates and the plurality of reflective sheets,
Wherein the plurality of opaque rims separate the plurality of strips from the release film and then affix them to the printed circuit board. 8. The method according to claim 6 or 7,
Stacking a guide sheet having a plurality of guide holes through which the plurality of light guide plates can pass, on a top surface of the first base sheet before stacking the second base sheet;
Further comprising the step of attaching each of the plurality of light guide plates to each of the plurality of reflective sheets through the plurality of guide holes and then removing the second base sheet and the guide film . 8. The method according to claim 6 or 7,
Printing a plurality of user interface symbols on one side of the optical waveguide film with a light diffusion ink prior to laminating the second base sheet;
Attaching the second base sheet to one surface of the optical waveguide film;
Forming the plurality of light guide plates by cutting the optical waveguide film so that the plurality of user interface symbols are included;
Further comprising the step of removing the optical waveguide film from the second base sheet so that the plurality of light guide plates are attached to the second base sheet,
Wherein the step of printing the user interface symbol further prints a stripe pattern parallel to the optical axis of the light source so that a plurality of optical paths are formed along the optical axis of the light source. 10. The method of claim 9,
Printing a light diffusion film on the lower surface of the light guide plate opposite to the light source along a direction orthogonal to the optical axis of the light source so as to be spaced apart from the interface symbol;
Further comprising printing the impermeable film on the edge of one side of the light guide plate adjacent to the light source by impermeable ink. ≪ Desc / Clms Page number 17 > 8. The method according to claim 6 or 7,
Further comprising attaching a protective film to the top surface of the first base sheet after removing the third base sheet. ≪ Desc / Clms Page number 19 >

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