KR101572991B1 - Multi-light guide sheet and liquid crystal display device including the same - Google Patents

Abstract

The present invention relates to a multi-light guide sheet and a liquid crystal display device having the same and, more specifically, relates to a method to manufacture a multi-light guide sheet having excellent anti-spattering characteristics, an ultraviolet ray (UV) curable resin composition applied thereto, and a liquid crystal display device using the same. In a mobile terminal having a display part related to an embodiment of the present invention, at least a part of the display part comprises the multi-light guide sheet. The multi-light guide sheet comprises: a UV curable resin layer; an upper base layer arranged on the UV curable resin layer formed of a polymethylmethacrylate (PMMA) material; a UV curable upper coating layer arranged on an upper base layer, coated with a high hardness material; a lower base layer arranged on an undersurface of the UV curable resin layer, and formed of the PMMA sheet or a polycarbonate sheet; and a light curable lower coating layer formed on the undersurface of the lower base layer, and formed of a coating material with a buffer function.

Description

TECHNICAL FIELD [0001] The present invention relates to a composite optical sheet and a liquid crystal display including the composite optical sheet.

The present invention relates to a composite optical sheet and a liquid crystal display device including the composite optical sheet. That is, the present invention relates to a process for producing an optical composite sheet excellent in scattering-preventive properties, a photocurable resin composition applied thereto, and a liquid crystal display device using the same.

More particularly, the present invention relates to an optical composite sheet excellent in abrasion resistance and anti-scattering properties to which a photocurable resin composition is applied, and which can be used as a substitute for a tempered glass window. The optical composite sheet is excellent in hardness, And to an optical composite sheet.

A terminal such as a personal computer, a notebook computer, a mobile phone, or the like can be configured to perform various functions. Examples of such various functions include a data and voice communication function, a function of photographing a video or a moving image through a camera, a voice storage function, a music file playback function through a speaker system, and an image or video display function. Some terminals include additional functions to execute games, and some other terminals are also implemented as multimedia devices. Moreover, recent terminals can receive a broadcast or multicast signal to view a video or television program.

In general, a terminal can be divided into a mobile terminal (mobile / portable terminal) and a stationary terminal according to whether the terminal can be moved. The mobile terminal can be divided into a handheld terminal and a vehicle mount terminal according to whether the user can directly carry the mobile terminal.

Such a terminal has various functions, for example, in the form of a multimedia device having multiple functions such as photographing and photographing of a moving picture, reproduction of a music or video file, reception of a game and broadcasting, etc. .

A display for displaying various information such as the current state or the operating state of the device is formed on the body of the terminal and the one side of the body.

Further, a space is formed in the display so as to be identifiable from the outside, and in particular, a window panel for preventing the display from being damaged by an external impact or foreign matter is constituted.

Tempered glass applied to the display of smartphone and tablet PC is superior in impact resistance compared to ordinary glass but it is frequently damaged due to falling or external impact due to user's carelessness, Is required.

In addition, the tempered glass manufacturing process is not easy, and the post-process (printing and processability) is complicated and the cost of parts is high (7 to 10 times as large as that of a general PMMA sheet).

In addition, there is a disadvantage in that the weight is larger than that of the transparent optical sheet and the portability is deteriorated.

Therefore, the optical composite sheet having excellent impact resistance and excellent optical properties is in need of replacing the above-mentioned disadvantages. However, the hard coating sheet (PMMA sheet) currently applied to general mobile phone windows has excellent transmission characteristics, It is not suitable as a substitute for tempered glass to be applied to smartphone windows. Therefore, improvement measures are required.

Korea Patent Office Publication No. 10-2012-0020668

SUMMARY OF THE INVENTION The present invention has been made to overcome the above-mentioned problems, and it is an object of the present invention to provide an optical composite sheet which can compensate for insufficient impact resistance of a conventional tempered glass touch window, And to provide a window panel formed by a method of manufacturing a window panel formed of a tempered glass substitute used in a portable electronic device that enhances the competitiveness of a product by lowering the manufacturing cost by improving the manufacturing cost.

Another object of the present invention is to provide an optical composite sheet for use in a portable electronic device capable of manufacturing a window panel having various design patterns by freely forming shapes and steps of widths or steps of various patterns according to the purpose and position of the window panel. And a photocurable resin used in the production of the window panel.

It is to be understood that both the foregoing general description and the following detailed description of the present invention are exemplary and explanatory and are not intended to limit the invention to the precise form disclosed. It can be understood.

In a mobile terminal including a display unit according to an embodiment of the present invention for realizing the above-mentioned object, at least a part of the display unit includes a multi-light guide sheet, Ultraviolet Ray) Photocurable resin layer; An upper substrate layer provided on the upper surface of the UV photocurable resin layer and made of PMMA (poly (methylmethacrylate), polymethyl methacrylate); A photocurable top coating layer provided on an upper surface of the upper substrate layer and coated with a material having a high hardness; A lower base layer provided on the lower surface of the UV light cured resin layer and made of the PMMA or PC sheet (polycarbonate sheet); And a photocurable undercoat layer provided on a lower surface of the lower substrate layer and made of a coating agent for providing a buffer function; . ≪ / RTI >

The photocurable top coating layer may include at least a part of a siloxane oligomer, a polyfunctional urethane acrylate oligomer, an acrylic monomer, a silica sol, a photoinitiator, and a slip additive.

The photo-curable upper coating layer may contain 5 to 30% of the siloxane oligomer, 30 to 60% of the polyfunctional urethane acrylate oligomer, 10 to 50% of the acrylic monomer, 10 to 30% of the silacazole, 10% by weight of the slip additive, and 1 to 10% by weight of the slip additive.

The photocurable undercoat layer may further include a silicone-epoxy copolymer initiator having a (meth) acrylate group introduced therein.

The UV light curable resin layer may further include a polyurethane acrylate oligomer, an acrylic reactive monomer, an allostomer, and a photopolymerization initiator.

According to another aspect of the present invention, there is provided a method of manufacturing a multi-optical guide sheet including at least a part of a display unit of a mobile terminal, the method comprising the steps of: preparing a flat mold; A second step of forming a coating layer by coating a coating material composed of an ultraviolet ray (UV) curable composition on the upper surface of the flat mold; A third step of covering the upper surface of the substrate layer with a coated conductor to form a base layer; A fourth step of pressing the lower surface of the flat mold and the upper surface of the base layer with a pressing roller; A fifth step of irradiating ultraviolet rays at the top of the layered structure composed of the flat mold, the coating layer and the base layer to cure the layered structure; Separating the flat mold from the cured layered structure to obtain a coating sheet composed of the coating layer and the base layer; A seventh step of repeating the first to sixth steps to obtain a plurality of coated sheets; An eighth step of applying an optical elastic pressure-sensitive adhesive between a first coating sheet of the plurality of coating sheets and a second coating sheet vertically inverted 180 degrees; A ninth step of pressing a pressure-sensitive adhesive between the first coating sheet and the second coating sheet through the pressing roller to produce a multi-light guide sheet having a resin layer formed thereon; And curing the composite optical sheet by irradiating the ultraviolet rays at an upper portion thereof.

The thickness of the resin layer 300 in the ninth step 50 to the ultraviolet light that is applied in the step and the fifth step 10 to be pressed, and the range is from 200 to 100㎛ to 1000mJ / cm ² intensity, 0.1 seconds To < / RTI > 10 seconds.

When the photocurable resin composition of the present invention is coated on a plastic substrate such as PMMA (Polymethyl methacrylate), PC (Polycarbonate), PET (Polyethyleneterephthalate) and Composite Sheet (PMMA / PC), it is photo- It is excellent, has no warp, has surface hardness like glass, has less yellowing after coating, and can save energy compared to general thermosetting.

In addition, the composition and sheet according to the present invention can prevent breakage, which is a disadvantage of tempered glass, and lighten the product, and can be widely applied to products using conventional tempered glass.

For example, the present invention can provide an effect of solving defects and breakage in the processing of a window part of a touch screen product. In other words, it is possible to prevent breakage and scattering, which is the disadvantage of glass, while achieving light weight of the product, while utilizing the merits of ultra-light weight, excellent workability and impact resistance, It has the advantage of significantly reducing the weight of the screen product, and the plastic is superior in workability compared to glass, which can significantly increase the production yield due to defects and breakage.

In addition, since material cost is much lower than that of tempered glass, replacement cost can be greatly reduced.

In addition, the problem is that it is not possible to apply the display glass over a certain size because the size of the display glass is greatly enlarged and the yield is drastically lowered, and large-sized glass is very heavy and can not be carried by ordinary consumers. .

In addition, the glass has a problem in that it is difficult to join the outer case or the outer frames due to the difference in material, and when the joint is not perfect, dust or foreign matter penetrates through the gap, According to the present invention, since a plastic substrate can be used, a plastic of the same kind is very simple to join, and when it touches it, it is also permanent, so that the seam part which is sealed even in impact is not lifted or broken or opened.

It should be understood, however, that the effects obtained by the present invention are not limited to the above-mentioned effects, and other effects not mentioned may be clearly understood by those skilled in the art to which the present invention belongs It will be possible.

BRIEF DESCRIPTION OF THE DRAWINGS The accompanying drawings, which are incorporated in and constitute a part of the specification, illustrate preferred embodiments of the invention and, together with the description, serve to further the understanding of the technical idea of the invention, It should not be construed as limited.
FIG. 1 shows an example of a block diagram of a mobile terminal that can be applied to the present invention.
FIG. 2A is a perspective view of a portable terminal according to an embodiment of the present invention, and FIG. 2B is a rear perspective view of the portable terminal shown in FIG. 2A.
Fig. 3 shows an example of a section of an optical composite sheet according to the present invention.
FIG. 4 illustrates an example of a process flow chart sequentially showing the process of manufacturing an optical composite sheet according to the present invention.
Fig. 5 separately shows the technique applied to each step of Fig.
Fig. 6 shows an example of a chemical structural diagram of the siloxane resin related to the present invention.
Figures 7 to 9 show the chemical formulas used to describe one embodiment of the present invention.
Fig. 10 is a table showing the results of the scratch resistance test for each example in connection with the present invention.

Hereinafter, a preferred embodiment of the present invention will be described with reference to the drawings. In addition, the embodiment described below does not unduly limit the content of the present invention described in the claims, and the entire structure described in this embodiment is not necessarily essential as the solution means of the present invention.

Hereinafter, a mobile terminal to which the present invention can be applied will be described in detail.

A mobile phone, a smart phone, a laptop computer, a digital broadcasting terminal, a PDA (Personal Digital Assistants), a PMP (Portable Multimedia Player), a PDA Navigation, and the like. However, it will be readily apparent to those skilled in the art that the configuration according to the embodiments described herein may be applied to fixed terminals such as a digital TV, a desktop computer, and the like, unless the configuration is applicable only to the portable terminal.

FIG. 1 shows an example of a block diagram of a mobile terminal that can be applied to the present invention.

The portable terminal 1100 includes a wireless communication unit 1110, an audio / video input unit 1120, a user input unit 1130, a sensing unit 1140, an output unit 1150, a memory 1160, A controller 1180, a battery 1190, and the like. The components shown in Fig. 1 are not essential, and a portable terminal having more or fewer components may be implemented.

Hereinafter, the components will be described in order.

The wireless communication unit 1110 may include one or more modules for enabling wireless communication between the portable terminal 1100 and the wireless communication system or between the portable terminal 1100 and the network in which the portable terminal 1100 is located. For example, the wireless communication unit 1110 may include a broadcast receiving module 111, a mobile communication module 1112, a wireless Internet module 1113, a short range communication module 1114, a location information module 1115, .

The broadcast receiving module 1111 receives broadcast signals and / or broadcast-related information from an external broadcast management server through a broadcast channel.

The broadcast channel may include a satellite channel and a terrestrial channel. The broadcast management server may refer to a server for generating and transmitting broadcast signals and / or broadcast related information, or a server for receiving broadcast signals and / or broadcast related information generated by the broadcast management server and transmitting the generated broadcast signals and / or broadcast related information. The broadcast signal may include a TV broadcast signal, a radio broadcast signal, a data broadcast signal, and a broadcast signal in which a data broadcast signal is combined with a TV broadcast signal or a radio broadcast signal.

The broadcast-related information may refer to a broadcast channel, a broadcast program, or information related to a broadcast service provider. The broadcast-related information may also be provided through a mobile communication network. In this case, it may be received by the mobile communication module 1112.

The broadcast-related information may exist in various forms. For example, an EPG (Electronic Program Guide) of DMB (Digital Multimedia Broadcasting) or an ESG (Electronic Service Guide) of Digital Video Broadcast-Handheld (DVB-H).

For example, the broadcast receiving module 1111 may be a Digital Multimedia Broadcasting-Terrestrial (DMB-T), a Digital Multimedia Broadcasting-Satellite (DMB-S), a Media Forward Link Only A digital broadcasting system such as DVB-CB, OMA-BCAST, or Integrated Services Digital Broadcast-Terrestrial (ISDB-T). Of course, the broadcast receiving module 1111 may be adapted to other broadcasting systems as well as the digital broadcasting system described above.

The broadcast signal and / or broadcast related information received through the broadcast receiving module 1111 may be stored in the memory 1160.

The mobile communication module 1112 transmits and receives radio signals to at least one of a base station, an external terminal, and a server on a mobile communication network. The wireless signal may include various types of data depending on a voice call signal, a video call signal or a text / multimedia message transmission / reception.

The wireless Internet module 1113 refers to a module for wireless Internet access, and may be embedded in the mobile terminal 1100 or externally.

WLAN (Wi-Fi), Wibro (Wireless broadband), Wimax (World Interoperability for Microwave Access), HSDPA (High Speed Downlink Packet Access) and the like can be used as the technology of the wireless Internet.

The short-range communication module 1114 refers to a module for short-range communication. Bluetooth, Radio Frequency Identification (RFID), Infrared Data Association (IrDA), Ultra Wideband (UWB), ZigBee, and the like can be used as the short range communication technology.

The position information module 1115 is a module for obtaining the position of the portable terminal 1100, and a representative example thereof is a Global Position System (GPS) module. According to the current technology, the GPS module 1115 calculates distance information and accurate time information from three or more satellites, and then applies a trigonometric method to the calculated information to generate a three-dimensional string of latitude, longitude, The location information can be accurately calculated. At present, a method of calculating position and time information using three satellites and correcting an error of the calculated position and time information using another satellite is widely used. In addition, the GPS module 1115 can calculate speed information by continuously calculating the current position in real time.

Referring to FIG. 1, an A / V (Audio / Video) input unit 1120 is for inputting an audio signal or a video signal, and may include a camera 1121 and a microphone 1122. The camera 1121 processes an image frame such as a still image or a moving image obtained by the image sensor in the video communication mode or the photographing mode. The processed image frame can be displayed on the display portion 1151. [

The image frame processed by the camera 1121 can be stored in the memory 1160 or transmitted to the outside through the wireless communication unit 1110. [

At this time, two or more cameras 1121 may be provided depending on the use environment.

For example, the camera 1121 may include first and second cameras 1121a and 1121b for shooting 3D images on the opposite side of the portable terminal 100 where the display unit 1151 is provided, A third camera 1121c for self-photographing of the user may be provided in a part of the surface of the surface of the terminal 1100 on which the display unit 1151 is provided.

In this case, the first camera 1121a is for capturing a left eye image, which is a source image of a 3D image, and the second camera 1121b may be for capturing a right eye image.

The microphone 1122 receives an external sound signal by a microphone in a communication mode, a recording mode, a voice recognition mode, or the like, and processes it as electrical voice data. The processed voice data can be converted into a form that can be transmitted to the mobile communication base station through the mobile communication module 112 when the voice data is in the call mode, and output. The microphone 1122 may be implemented with various noise reduction algorithms for eliminating noise generated in the process of receiving an external sound signal.

The user input unit 1130 generates input data for controlling the operation of the terminal.

The user input unit 1130 may receive from the user a signal designating two or more contents among the displayed contents according to the present invention. A signal for designating two or more contents may be received via the touch input, or may be received via the hard key and soft key input.

The user input unit 1130 may receive an input from the user to select the one or more contents. In addition, the mobile terminal 1100 can receive an input from a user to generate an icon related to a function that the portable terminal 1100 can perform.

The user input unit 1130 may include a direction key, a key pad, a dome switch, a touch pad (static / static), a jog wheel, a jog switch, and the like.

The sensing unit 140 senses the current state of the portable terminal 1100 such as the open / close state of the portable terminal 1100, the position of the portable terminal 1100, the presence of the user, the orientation of the portable terminal, And generates a sensing signal for controlling the operation of the portable terminal 1100. For example, when the portable terminal 1100 is in the form of a slide phone, it is possible to sense whether the slide phone is opened or closed. It is also possible to sense whether the battery 1190 is powered on, whether the interface unit 1170 is connected to an external device, and the like. Meanwhile, the sensing unit 1140 may include a proximity sensor 1141. The proximity sensor 141 will be described later in relation to the touch screen.

The output unit 1150 is for generating output related to visual, auditory or tactile sense and includes a display unit 1151, an acoustic output module 1152, an alarm unit 1153, a haptic module 154 and a projector module 1155, and the like.

The display unit 1151 displays (outputs) information to be processed in the portable terminal 100. For example, when the portable terminal is in the call mode, a UI (User Interface) or a GUI (Graphic User Interface) associated with a call is displayed. When the portable terminal 100 is in the video communication mode or the photographing mode, the photographed and / or received image, UI, or GUI is displayed.

In addition, the display unit 1151 according to the present invention supports 2D and 3D display modes.

That is, the display unit 1151 according to the present invention may have a configuration in which a switch liquid crystal 1151b is combined with a general display device 1151a as shown in FIG. 1 below. Then, the optical parallax barrier 50 is operated by using the switch liquid crystal 1151b to control the traveling direction of the light, so that different lights can be separated from the left and right eyes. Therefore, when a combined image of the right eye image and the left eye image is displayed on the display device 1151a, the user can see the image corresponding to each eye and feel as if the image is displayed as a three-dimensional object.

That is, under the control of the control unit 1180, the display unit 1151 drives only the display device 1151a without driving the switch liquid crystal 1151b and the optical parallax barrier 50 in the 2D display mode Performs normal 2D display operation.

The display unit 1151 drives the switch liquid crystal 1151b and the optical parallax barrier 50 and the display device 1151a under the control of the control unit 1180 in the 3D display mode, 1151a to perform a 3D display operation.

The display unit 151 may be a liquid crystal display (LCD), a thin film transistor-liquid crystal display (TFT LCD), an organic light-emitting diode (OLED) A flexible display, and a three-dimensional display (3D display).

Some of these displays may be transparent or light transmissive so that they can be seen through. This can be referred to as a transparent display, and a typical example of the transparent display is TOLED (Transparent OLED) and the like. The rear structure of the display portion 1151 may also be of a light transmission type. With this structure, the user can see an object located behind the terminal body through the area occupied by the display portion 1151 of the terminal body.

There may be two or more display units 1151 according to the implementation mode of the portable terminal 1100. For example, in the portable terminal 100, a plurality of display units may be spaced apart from one another or may be disposed integrally with each other, or may be disposed on different surfaces.

(Hereinafter, referred to as a 'touch screen') in which a display unit 1151 and a sensor (hereinafter, referred to as 'touch sensor') that detects a touch operation form a mutual layer structure, It can also be used as an input device. The touch sensor may have the form of, for example, a touch film, a touch sheet, a touch pad, or the like.

The touch sensor may be configured to convert a change in a pressure applied to a specific portion of the display portion 1151 or a capacitance generated in a specific portion of the display portion 1151 into an electrical input signal. The touch sensor can be configured to detect not only the position and area to be touched but also the pressure at the time of touch.

If there is a touch input to the touch sensor, the corresponding signal (s) is sent to the touch controller (not shown). The touch controller processes the signal (s) and transmits corresponding data to controller 1180. Thus, the control unit 1180 can know which area of the display unit 1151 is touched or the like.

The proximity sensor 1141 may be disposed in an inner region of the portable terminal, which is wrapped by the touch screen, or in the vicinity of the touch screen. The proximity sensor refers to a sensor that detects the presence or absence of an object approaching a predetermined detection surface or a nearby object without mechanical contact using the force of an electromagnetic field or infrared rays. The proximity sensor has a longer life span than the contact sensor and its utilization is also high.

Examples of the proximity sensor include a transmission type photoelectric sensor, a direct reflection type photoelectric sensor, a mirror reflection type photoelectric sensor, a high frequency oscillation type proximity sensor, a capacitive proximity sensor, a magnetic proximity sensor, and an infrared proximity sensor. And to detect the proximity of the pointer by the change of the electric field along the proximity of the pointer when the touch screen is electrostatic. In this case, the touch screen (touch sensor) may be classified as a proximity sensor.

Hereinafter, for convenience of explanation, the act of recognizing that the pointer is positioned on the touch screen while the pointer is not in contact with the touch screen is referred to as "proximity touch & The act of actually touching the pointer on the screen is called "contact touch. &Quot; The position where the pointer is proximately touched on the touch screen means a position where the pointer is vertically corresponding to the touch screen when the pointer is touched.

The proximity sensor detects a proximity touch and a proximity touch pattern (e.g., a proximity touch distance, a proximity touch direction, a proximity touch speed, a proximity touch time, a proximity touch position, a proximity touch movement state, and the like). Information corresponding to the detected proximity touch operation and the proximity touch pattern may be output on the touch screen.

The audio output module 1152 can output audio data received from the wireless communication unit 1110 or stored in the memory 1160 in a call signal reception mode, a call mode or a recording mode, a voice recognition mode, a broadcast reception mode, The sound output module 1152 also outputs sound signals associated with functions (e.g., call signal reception sound, message reception sound, and the like) performed in the portable terminal 1100. The sound output module 1152 may include a receiver, a speaker, a buzzer, and the like.

The alarm unit 1153 outputs a signal for notifying the occurrence of an event of the portable terminal 1100. Examples of events occurring in the portable terminal include receiving a call signal, receiving a message, inputting a key signal, and touch input. The alarm unit 1153 may output a signal for informing occurrence of an event in a form other than a video signal or an audio signal, for example, a vibration. In this case, the display unit 1151 and the audio output module 152 may be a type of the alarm unit 1153. The display unit 1151 and the audio output module 152 may be connected to the display unit 1151 or the audio output module 1152, .

The haptic module 154 generates various tactile effects that the user can feel. A typical example of the haptic effect generated by the haptic module 154 is vibration. The intensity and pattern of the vibration generated by the hit module 154 can be controlled. For example, different vibrations may be synthesized and output or sequentially output.

In addition to vibration, the haptic module 1154 may be configured to perform various functions such as a pin arrangement vertically moving with respect to the contact skin surface, a spraying force or suction force of the air through the injection port or the suction port, a touch on the skin surface, contact with an electrode, And various tactile effects such as an effect of reproducing a cold sensation using an endothermic or exothermic element can be generated.

The haptic module 1154 can be implemented not only to transmit a tactile effect through direct contact, but also to allow a user to feel a tactile effect through a muscular sensation such as a finger or an arm. At least two haptic modules 1154 may be provided according to the configuration of the portable terminal 1100.

The projector module 1155 is a component for performing an image project function using the portable terminal 1100 and is similar to the image displayed on the display unit 1151 according to a control signal of the controller 1180 Or at least partly display another image on an external screen or wall.

Specifically, the projector module 1155 includes a light source (not shown) that generates light (for example, laser light) for outputting an image to the outside, a light source And a lens (not shown) for enlarging and outputting the image at a predetermined focal distance to the outside. Further, the projector module 1155 may include a device (not shown) capable of mechanically moving the lens or the entire module to adjust the image projection direction.

The projector module 1155 can be divided into a CRT (Cathode Ray Tube) module, an LCD (Liquid Crystal Display) module and a DLP (Digital Light Processing) module according to the type of the display means. In particular, the DLP module may be advantageous in downsizing the projector module 1151 by enlarging and projecting an image generated by reflecting light generated from a light source on a DMD (Digital Micromirror Device) chip.

Preferably, the projector module 1155 may be provided on the side, front or back side of the portable terminal 1100 in the longitudinal direction. It goes without saying that the projector module 1155 may be provided at any position of the portable terminal 1100 as necessary.

The perfume output section 1156 also provides a function of storing and outputting a plurality of perfumes.

The perfume output unit 1156 provided at a specific position of the mobile terminal 1100 can output at least one of the stored fragrances to the outside under the control of the control unit 1180. [

Here, the plurality of fragrances stored in the perfume output portion 1156 may be aromatic. For example, aromatic aromas can be found in Basil, Bergamot, Camphor, Cedarwood, Chamomile, Clary Sage, Cypress, Eucalyptus, Geranium, Ginger, Hussop, Jasmine, Juniiper, Lavender, Lemon, Marijoram, Melissa, Myrrh, Neroli, Orange, Patchouli, Peppermint, Pine, Rosemary, Rosewood, Sandalwood, Tea Tree, Tea Tree " and " Ylang Ylang ". It should be understood, however, that this is merely one example to which the present invention can be applied, and that the present invention can be applied to other kinds of scents.

The perfume output from the perfume output unit 1156 may be determined based on the control of the control unit 1180 such as the timing of the output, the output time, and the output of the perfume. The control unit 1180 may determine timing, output timing, and output timing of the perfume output from the perfume output unit 1156 according to information received from the outside, and a detailed description thereof will be described later .

Although the perfume output unit 1156 is shown separately in the output unit 1150 in FIG. 1, the perfume output unit 1156 may be included in the mobile terminal 1100 through the interface unit 1170.

For example, when the interface unit 1170 provides a function of connecting the charging device, the mobile terminal 1100 can be manufactured so that the perfume output unit 1156 is provided in the interface unit 1170.

Also, unlike that shown in FIG. 1, a perfume output portion 1156 may be included within the sound output module 1152.

For example, a perfume output unit 1156 may be provided at a portion where the earphone is coupled, and a predetermined perfume may be output under the control of the controller 1180.

The location of the above-described perfume output unit 1156 is merely an example of application of the present invention and includes a wireless communication unit 1110, an A / V input unit 1120, a user input unit 1130, It may be provided in the mobile terminal 1100 together with the sensing unit 1140, the output unit 1150, the memory 1160, the interface unit 1170, the control unit 1180 and the battery 1190 or separately.

The memory 1160 may store a program for processing and controlling the control unit 1180 and may store the input / output data (e.g., telephone directory, message, audio, still image, electronic book, History, and the like). The memory 1160 may also store the frequency of use of each of the data (e.g., each telephone number, each message, and frequency of use for each multimedia). In addition, the memory unit 1160 may store data related to vibration and sound of various patterns that are output upon touch input on the touch screen.

In addition, the memory 1160 stores a web browser displaying a 3D or 2D web page, in accordance with the present invention.

The memory 1160 may be a flash memory type, a hard disk type, a multimedia card micro type, a card type memory (for example, SD or XD memory, etc.) ), A random access memory (RAM), a static random access memory (SRAM), a read-only memory (ROM), an electrically erasable programmable read-only memory (EEPROM), a programmable read- A magnetic disk, an optical disk, a memory, a magnetic disk, or an optical disk. The portable terminal 1100 may operate in association with a web storage that performs a storage function of the memory 1160 on the Internet.

The interface unit 1170 serves as a path to all the external devices connected to the portable terminal 1100. The interface unit 1170 receives data from an external device or receives power from the external device and transmits the data to each component in the portable terminal 1100 or transmits data in the portable terminal 1100 to an external device. For example, a wired / wireless headset port, an external charger port, a wired / wireless data port, a memory card port, a port for connecting a device having an identification module, an audio I / O port, A video input / output (I / O) port, an earphone port, and the like may be included in the interface unit 170.

The identification module is a chip for storing various information for authenticating the usage right of the portable terminal 1100 and includes a user identification module (UIM), a subscriber identification module (SIM), a general user authentication module A Universal Subscriber Identity Module (USIM), and the like. Devices with identification modules (hereinafter referred to as "identification devices") can be manufactured in a smart card format. Accordingly, the identification device can be connected to the terminal 1100 through the port.

When the portable terminal 1100 is connected to an external cradle, the interface unit may be a path through which power from the cradle is supplied to the portable terminal 1100 or various command signals input from the cradle by the user It can be a passage to be transmitted to the terminal. The various command signals input from the cradle or the power source may be operated as a signal for recognizing that the portable terminal is correctly mounted on the cradle.

The controller 1180 typically controls the overall operation of the mobile terminal. For example, voice communication, data communication, video communication, and the like. The control unit 1180 may include a multimedia module 1181 for multimedia playback. The multimedia module 1181 may be implemented in the control unit 1180 or may be implemented separately from the control unit 1180.

The control unit 1180 may perform a pattern recognition process for recognizing handwriting input or drawing input performed on the touch screen as characters and images, respectively.

When the display unit 1151 is formed of an organic light-emitting diode (OLED) or a TOLED (Transparent OLED), the controller 1180 controls the display unit 1151, When the preview image is pulled up on the screen of the organic light-emitting diode (OLED) or the TOLED (Transparent OLED) and the size of the preview image is adjusted according to the user's operation, The power consumption of the power source supplied from the power supply unit 1190 to the display unit 151 can be reduced by turning off the driving of the pixels in the second area except for the first area where the preview image with the adjusted preview image is displayed.

The power supply unit 1190 receives external power and internal power under the control of the controller 1180 and supplies power required for operation of the respective components.

The various embodiments described herein may be embodied in a recording medium readable by a computer or similar device using, for example, software, hardware, or a combination thereof.

According to a hardware implementation, the embodiments described herein may be implemented as application specific integrated circuits (ASICs), digital signal processors (DSPs), digital signal processing devices (DSPDs), programmable logic devices (PLDs), field programmable gate arrays May be implemented using at least one of a processor, controllers, micro-controllers, microprocessors, and other electronic units for performing other functions. In some cases, The embodiments described may be implemented by the control unit 1180 itself.

According to a software implementation, embodiments such as the procedures and functions described herein may be implemented with separate software modules. Each of the software modules may perform one or more of the functions and operations described herein. Software code can be implemented in a software application written in a suitable programming language. The software code is stored in the memory 1160 and can be executed by the control unit 1180. [

2A is a perspective view of a portable terminal according to an embodiment of the present invention.

The disclosed portable terminal 1100 includes a bar-shaped main body. However, the present invention is not limited thereto, and can be applied to various structures such as a slide type, a folder type, a swing type, and a swivel type in which two or more bodies are relatively movably coupled.

The body includes a case (a casing, a housing, a cover, and the like) which forms an appearance. In this embodiment, the case may be divided into a front case 1101 and a rear case 1102. [ Various electronic components are embedded in the space formed between the front case 1101 and the rear case 1102. [ At least one intermediate case may be additionally disposed between the front case 1101 and the rear case 1102. [

The cases may be formed by injection molding a synthetic resin or may be formed to have a metal material such as stainless steel (STS) or titanium (Ti) or the like.

The front body 1101 mainly includes a display unit 1151, an audio output unit 1152, a third camera 1121c, user inputs 1130/1131 and 1132, a microphone 1122, an interface 1170, Etc. may be disposed.

The display portion 1151 occupies most of the main surface of the front case 1101. A sound output unit 1151 and a camera 1121 are disposed in an area adjacent to one end of both ends of the display unit 1151 and a user input unit 1131 and a microphone 1122 are disposed in an area adjacent to the other end. The user input unit 1132 and the interface 1170 may be disposed on the side surfaces of the front case 101 and the rear case 1102. [

The user input unit 1130 is operated to receive a command for controlling the operation of the portable terminal 1100 and may include a plurality of operation units 1131 and 1132. The operation units 1131 and 1132 may be collectively referred to as a manipulating portion.

Contents input by the first or second operation units 1131 and 1132 can be variously set. For example, the first operation unit 1131 receives commands such as start, end, scroll, and the like, and the second operation unit 1132 receives a command to adjust the size of the sound output from the sound output unit 1152, The touch recognition mode can be activated or deactivated.

FIG. 2B is a rear perspective view of the portable terminal shown in FIG. 2A.

Referring to FIG. 2B, a third camera 1121c may be further mounted on the rear surface of the portable terminal body, that is, the rear case 1102. FIG. The third camera 1121c has a photographing direction substantially opposite to that of the first and second cameras 1121a and 1121b and may be a camera having the same or different pixels as the first and second cameras 1121a and 1121b have.

A flash 1123 and a mirror 1124 may be additionally disposed adjacent to the third camera 1121c. The flash 1123 shines light toward the subject when the subject is photographed by the third camera 1121c. The mirror 1124 enables the user to illuminate the user's own face or the like when the user intends to take a picture of himself / herself (self-photographing) using the third camera 1121c.

The sound output module 1152 'may be further disposed on the rear surface of the portable terminal body. The sound output unit 152 'may implement the stereo function together with the sound output module 1152 (see FIG. 2A), and may be used for the implementation of the speakerphone mode during a call.

In addition to the antenna for communication, a broadcast signal receiving antenna 1116 may be additionally disposed on the side of the portable terminal body. An antenna 1116 constituting a part of the broadcast receiving unit 1111 (see FIG. 1) may be installed to be able to be drawn out from the terminal body.

A power supply unit 1190 for supplying power to the portable terminal 1100 is mounted on the terminal body. The power supply unit 1190 may be embedded in the terminal body or may be detachable from the outside of the terminal body.

The rear case 1102 may further include a touch pad 1135 for sensing a touch. The touch pad 1135 may be of a light transmitting type for the display portion 1151. [ In this case, if the display unit 1151 is configured to output the time information on both sides (i.e., in the directions of both the front and back sides of the mobile terminal), the time information can be recognized through the touch pad 1135 do. The information output on both surfaces may be controlled by the touch pad 1135. [

In addition, a separate display for the touch pad 1135 may be additionally provided, so that the touch screen may be disposed in the rear case 1102.

The touch pad 1135 operates in correlation with the display portion 1151 of the front case 1101. The touch pad 1135 may be disposed parallel to the rear of the display unit 1151. [ The touch pad 1135 may have a size equal to or smaller than that of the display portion 1151.

A display for displaying various information such as the current state or the operating state of the device is formed on the body of the terminal and the one side of the body.

Further, a space is formed in the display so as to be identifiable from the outside, and in particular, a window panel for preventing the display from being damaged by an external impact or foreign matter is constituted.

Tempered glass applied to the display of smartphone and tablet PC is superior in impact resistance compared to ordinary glass but it is frequently damaged due to falling or external impact due to user's carelessness, Is required.

In addition, the tempered glass manufacturing process is not easy, and the post-process (printing and processability) is complicated and the cost of parts is high (7 to 10 times as large as that of a general PMMA sheet).

In addition, there is a disadvantage in that the weight is larger than that of the transparent optical sheet and the portability is deteriorated.

The optical composite sheet excellent in impact resistance and excellent in optical properties, which complements the above-mentioned disadvantages, is in desperate need to be replaced. However, the hard coating sheet (PMMA sheet) Which is not suitable as a substitute for tempered glass for smartphone windows.

Accordingly, the present invention provides a method for producing an optical composite sheet excellent in scattering-preventing properties, a photocurable resin composition applied thereto, and a liquid crystal display device using the same.

More particularly, the present invention relates to an optical composite sheet excellent in abrasion resistance and anti-scattering properties to which a photocurable resin composition is applied, and which can be used as a substitute for a tempered glass window. The optical composite sheet is excellent in hardness, Composition and an optical composite sheet.

Specific details of the present invention will be described with reference to the drawings.

Fig. 3 shows an example of a section of an optical composite sheet according to the present invention.

Referring to Fig. 3, there is shown a cross section of an optical composite sheet having scattering-preventing properties according to the present invention.

The optical composite sheet 10 according to the present invention comprises an upper coating layer 110 coated with a high hardness, an upper substrate layer 100 made of a PMMA material, a UV resin layer 300 having excellent impact resistance, A lower substrate layer 200 made of PMMA or PC sheet, and the like.

4 is a flowchart illustrating an optical composite sheet manufacturing process according to an embodiment of the present invention.

Referring to FIG. 4, the process of preparing the flat plate mold S100, the coating process S200, the pressing process S300, the hardening process S400, the mold release process S500, the lapping process S600, Process step S700.

First, step S100 of FIG. 3 is a step of preparing a flat mold having excellent roughness.

Next, in step S200, a coating material consisting of the UV-curable composition 110 or 210 is dropped onto the flat mold 21 to form a resin layer 110 or 210, Process.

Step S300 is a step of pressing the upper and lower layers of the layered structure composed of the flat mold 21, the resin layer 11 and the coated conductor 100 or 200 with the pressing roller 22 to a constant coating thickness A resin layer 110 or 210 is formed.

At this time, the thickness of the resin layer (110 or 210) is preferably in the range of 5 to 10 mu m, and outside the above range, the surface of the coating film is cracked and warped, which is not preferable.

In step S400, ultraviolet light (UV) is irradiated from the top of the layered structure to cure the resin layer 110 or 210 by using the LED UV lamp 23 as a curing process step.

At this time, it is preferable to irradiate the ultraviolet ray at an amount of 200 to 500 mJ / cm 2 for 1 second to 5 seconds.

Next, in step S500, the flat mold 21 is separated into a release process step to obtain a coating sheet coated with a resin having excellent roughness.

In step S600, an optical elastic adhesive is applied between the upper coating sheet 130 and the lower coating sheet 230 to form a uniform coating film using the pressing roller.

At this time, the thickness of the resin layer 300 is preferably in the range of 50 to 100 mu m, and outside the above range, the impact resistance is lowered or uncured, which is not preferable.

Finally, in step S700, the resin layer 300 is cured by irradiating ultraviolet rays (UV) on the upper coating sheet using an LED UV lamp 23 as a curing process step. At this time, it is preferable to irradiate the ultraviolet ray at a light amount of 500 to 1000 mJ / cm2 for 1 second to 5 seconds.

Meanwhile, FIG. 5 shows the technique applied to each step of FIG. 4 separately.

FIG. 5A shows a step of preparing a flat mold having an excellent roughness in step S100.

5B is a step of applying the coating material of the UV curable composition 110 or 210 onto the flat mold 21 to form the resin layer 110 or 210 and the coated conductor 12).

5C is a step of pressing the pressing roller 22 at the upper and lower portions of the layered structure composed of the flat plate mold 21, the resin layer 11 and the coated conductor 100 or 200, The resin layer 110 or 210 is formed to have a uniform coating thickness.

5D shows a process of curing the resin layer 110 or 210 by irradiating ultraviolet rays (UV) from the upper part of the layered structure using the LED UV lamp 23 in the curing step of step S400 .

FIG. 5E shows a process of separating the flat mold 21 and obtaining a coating sheet coated with a resin having excellent roughness, in the mold-releasing step of step S500.

5F is a lapping step of step S600. The optical elastic pressure sensitive adhesive is applied between the upper coating sheet 130 and the lower coating sheet 230 to form a uniform coating film using a platen roller. FIG.

5G shows a process of curing the resin layer 300 by irradiating ultraviolet rays (UV) on the upper coating sheet using the LED UV lamp 23 as a curing process step of step S700.

5 (h) shows the final product after step S700.

On the other hand, a photocurable resin composition can be applied to the optical composite sheet having excellent scattering-preventing properties according to the present invention.

The photocurable composition for top sheet coating used in the present invention is prepared by using a composition having excellent hardness and abrasion resistance.

Specifically, the photocurable composition is prepared by using a composition in the form of a solventless composition comprising a siloxane oligomer, a polyfunctional urethane acrylate oligomer, an acrylic monomer, a silica sol, a photoinitiator and a slip additive, .

More specifically, the ultraviolet curable coating composition comprises 5 to 30%, preferably 10 to 20% by weight of a siloxane oligomer; 30 to 60%, preferably 40 to 50% by weight of polyfunctional oligomers; 10 to 50%, preferably 10 to 30% by weight of monomers: 10 to 30%, preferably 20 to 30% by weight of silacazole; 1 to 10% by weight, preferably 2 to 5% by weight, of a photoinitiator; Additive photoinitiator 1 to 10% by weight, preferably 1 to 5% by weight.

Fig. 6 shows an example of a chemical structural diagram of the siloxane resin related to the present invention.

The chemical structure diagram shown in Fig. 6 is referred to as Chemical Formula 1 in this specification.

Referring to FIG. 6, the siloxane resin is an oligomer having the form of the chemical formula shown in FIG.

The photocurable composition for lower sheet coating used in the present invention is prepared by using a composition having an excellent adhesive property which acts as a buffer. Specifically, the photocurable composition is formed in the form of a solvent-free silicone-epoxy copolymer having an (meth) acrylate group introduced at its terminal, an acrylic monomer, and a photoinitiator.

Hereinafter, a method for preparing a UV-curable coating composition according to a specific embodiment of the present invention will be described in detail.

According to one embodiment of the invention, a silicone-epoxy copolymer having a (meth) acrylate group introduced at the terminal thereof; An ultraviolet curable coating composition containing an initiator may be provided.

It has been confirmed through experimentation that a coating material having high abrasion resistance and excellent buffering ability can be provided by using a UV-curable coating composition containing a silicone-epoxy copolymer having a (meth) acrylate group introduced at the terminal .

Particularly, in a silicone-epoxy copolymer having a (meth) acrylate group introduced at the terminal, the silicone component can have a high self-healing ability by allowing the coating film or coating film to have high elasticity, The coating film can have mechanical properties such as high chemical resistance, scratch resistance and abrasion resistance.

In general, the silicone component or the epoxy compound has high flexibility and excellent thermal stability, but does not have sufficient mechanical properties. The epoxy component is excellent in mechanical strength and chemical resistance, but has insufficient flexibility and has a long curing time. . Further, the silicone component and the epoxy component are compatible with each other

the compatibility is poor, and when they are physically mixed and coated, the respective components are not uniformly mixed in the formed coating film and not only phase-separated but also the optical properties of the film are greatly deteriorated.

On the other hand, the silicone-epoxy copolymer having the (meth) acrylate group introduced at the terminal thereof can not only realize the respective properties of the silicone component or the epoxy component, but also the case where the silicone compound and the epoxy compound are physically mixed The synergistic effect of simple mixing or more can be ensured as one component which is copolymerized differently.

In addition, the (meth) acrylate group at the end of the silicone-epoxy copolymer can be chemically bonded to other acrylate binder resin upon irradiation with ultraviolet rays, so that the silicone-epoxy copolymer can have excellent mechanical properties and buffering ability.

In the present specification, '(meth) acrylate' was used to mean both 'methacrylate' and 'acrylate'.

7 to 9 show the chemical formulas used to explain one embodiment of the present invention.

Hereinafter, for convenience of explanation, the chemical formulas shown in FIG. 7 are referred to as chemical formulas 2, the chemical formulas shown in FIG. 8 are referred to as chemical formulas 3, and the chemical formulas shown in FIG.

On the other hand, the silicone-epoxy copolymer to which the (meth) acrylate group is introduced at the terminal may be a polymer including a repeating unit of the following formula (2) and a repeating unit of the following formula (3). That is, in the silicone-epoxy copolymer, the silicon component may be represented by the repeating unit of formula (2), and the epoxy component may be represented by the repeating unit of formula (3).

In the general formula (2), n is an integer of 1 to 150.

In the formula (3), R 1 and R 2 may be the same or different from each other, and each may be a hydrogen, a methyl group or an ethyl group.

The silicone-epoxy copolymer to which the (meth) acrylate group is introduced at the terminal may be a polymer compound containing a repeating unit represented by the following formula (4).

In the general formula (4), n is an integer of 1 to 150, and R 1 and R 2 may be the same or different and each may be hydrogen, methyl group or ethyl group.

On the other hand, in the silicone-epoxy copolymer having the (meth) acrylate group introduced at the terminal, the content of the silicone component, that is, the repeating unit of the above formula (2), may be 5 to 50 wt%. If the content of the silicone component is less than 5% by weight, the coating material produced from the composition may be difficult to secure sufficient flexibility and elasticity. If the content of the silicone component is more than 50% by weight, miscibility or compatibility with other components of the composition may be deteriorated, and the physical properties of the coating material to be produced may be deteriorated.

The weight average molecular weight of the silicone-epoxy copolymer to which the (meth) acrylate group is introduced at the terminal may be 1,000 to 30,000. If the weight-average molecular weight of the silicone-epoxy copolymer is less than 1,000, it may be difficult to sufficiently secure the self-healing ability of a coating material such as a coating film prepared from the coating composition, If the molecular weight is more than 30,000, compatibility or compatibility with other components may be deteriorated and the physical properties of the coating material to be produced may be deteriorated.

In addition, the coating composition may include a photoinitiator. As such photoinitiator, compounds known to be commonly used may be used without limitation, and examples thereof include benzophenone compounds, acetophenone compounds, A triazine-based compound, an oxime-based compound, or a mixture thereof. That

Specific examples of such photo initiators include benzophenone, benzoyl methyl benzoate, acetophenone, 2,4-diethyl thioxanthone, 2- 2-chloro thioxanthone, ethyl anthraquinone, 1-Hydroxy-cyclohexyl-phenyl-ketone (commercially available from Irgacure 184 of Ciba) or 2 Hydroxy-2-methyl-1-phenyl-propan-1-one) and the like.

On the other hand, the ultraviolet curable coating composition comprises 10 to 80% by weight, preferably 20 to 60% by weight, of a silicone-epoxy copolymer having a (meth) acrylate group introduced at the terminal thereof; 0.1 to 20% by weight, preferably 1 to 15% by weight, of a photoinitiator.

The photocurable composition used in the present invention, which is a pressure sensitive adhesive for composites, is used to produce and use a composition having excellent adhesiveness between the same or different species. Specifically, it is preferable to use a photo-curable composition which is capable of photo-curing immediately without using a drying time by using a composition in the form of a solventless composition comprising a reactive oligomer and a monomer and a photoinitiator.

The types of reactive oligomers, monomers and photoinitiators used in the composition are not limited and can be prepared by controlling the combination and content of various components, so that the components and the content ranges thereof are not limited to the present invention. However, it is preferable that the photocurable composition has a shock absorbing property (rebound ratio) in order to serve as a cushioning material after curing the photocurable composition, and it is preferable that the adhesive strength to the upper sheet and the lower sheet is excellent. Such physical properties can be controlled by the oligomer and the monomer.

More specifically, when the composition of the photocurable resin is 0.5 to 10 wt% or more and 10 wt% or more of the acrylic elastomer, the viscosity of the elastic resin is remarkably increased to make it difficult to produce a sheet, There is a case. If the amount is less than 0.5% by weight, the elasticity and elongation properties of the elastomer-containing polymer layer may deteriorate, which may make it difficult to exhibit the inherent properties of the elastomer.

Next, the (meth) acrylate monomer having an alkyl group having 1 to 14 carbon atoms is a monomer which provides an adhesive force, and preferably has a glass transition temperature of -70 to 130 ° C. When the number of carbon atoms is out of the above range, it is not preferable because the glass transition temperature is high or the tackiness is difficult to control. More preferably an alkyl group having 4 to 14 carbon atoms.

The (meth) acrylate-based monomer having an alkyl group having 1 to 14 carbon atoms may be at least one selected from the group consisting of methyl acrylate, ethyl acrylate, butyl acrylate, 2-ethylbutyl acrylate, 2-ethylhexyl acrylate, hexyl acrylate, Acrylate, n-pentyl acrylate, vinyl acrylate, lauryl acrylate, methyl methacrylate, ethyl methacrylate, butyl methacrylate, 2-ethylbutyl methacrylate, 2-ethylhexyl methacrylate And lauryl methacrylate. These monomers may be used singly or in combination of two or more. It is preferable to use 2-ethylhexyl methacrylate.

The (meth) acrylate-based monomer having an alkyl group having 1 to 14 carbon atoms includes 90 to 99.5% by weight based on the total weight of the mixture. Preferably 92 to 99% by weight, and more preferably 92 to 95% by weight. When the content is less than 90% by weight, the elastomer can not be sufficiently melted, the viscosity is too high, and the workability is poor and the tackiness is deteriorated and the physical properties as a pressure sensitive adhesive are not exhibited. When the content is more than 99.5% by weight, the elasticity and elongation of the elastomer deteriorate, The desired physical properties can not be obtained.

The elastic resin composition according to the present invention comprises at least one monomer selected from the group consisting of vinyl monomers and functional acrylic monomers.

The vinyl monomer may be selected from the group consisting of 2-hydroxyethyl (meth) acrylate, 2-hydroxypropyl (meth) acrylate, 4-hydroxybutyl (meth) (Meth) acrylate and 2-hydroxypropylene glycol (meth) acrylate, and the functional acrylic monomer is selected from the group consisting of (meth) acrylic acid, acrylic acid diester, itaconic acid, maleic acid, maleic anhydride, Fumaric acid, acrylamide, N-vinylpyrrolidone, and N-vinylcaprolactam.

The amount of the at least one monomer selected from the vinyl monomers and the functional acrylic monomers can be appropriately adjusted depending on the purpose and use of the viscoelastic resin. For example, when it is used in applications requiring adhesion to glass or plastic containers, it is used in an amount of 1 to 30 parts by weight, more preferably 1 to 10 parts by weight, based on 100 parts by weight of the mixture. When the amount is more than 30 parts by weight, for example, the elastomer-containing polymer layer becomes too hard, which may lower the adhesiveness. If the amount is less than 1 part by weight, the cohesive force of the elastomer-containing polymer layer is lowered, so that a high shearing force may not be obtained, or the surface of the elastomer-containing polymer layer becomes too strong.

In the elastic resin composition of the present invention, the acrylic crosslinking agent serves to form a crosslinked structure. Acrylic crosslinking agents include 1,6-hexanediol diacrylate (HDDA), trimethylolpropane triacrylate (TMPTA), pentaerythritol triacrylate (PETA), dipentaerythritol hexaacrylate (DPHA), 1,2 - ethylene glycol diacrylate, and 1,12-dodecanediol acrylate, and it is preferable to use dipentaerythritol hexaacrylate.

The photopolymerization initiator is not particularly limited as long as it initiates photopolymerization, and a commonly used photopolymerization initiator can be used. For example, a benzoin ether type, an acetophenone type, an α-ketol type, a photoactive oxime type, a benzoin type, a benzyl type, a benzophenone type, a ketal type, a thioxanthone type and an acylphosphine oxide type can be used have.

Specific examples of the benzoin ether compound include benzoin methyl ether, benzoin ethyl ether, benzoin propyl ether, benzoin isopropyl ether, benzoin isobutyl ether, 2,2-dimethoxy-1,2-di Phenylethan-1-one, anisole methyl ether, and the like. Examples of the acetophenone-based solvents include 2,2-diethoxyacetophenone, 2,2-dimethoxy-2-phenylacetophenone, 1-hydroxycyclohexylphenylketone, 4-phenoxydichloroacetone, 4- Butyl dichloroacetophenone, and the like. As the? -ketol group,

For example, 2-methyl-2-hydroxypropiophenone and 1- [4- (2-hydroxyethyl) phenyl] -2-hydroxy-2-methylpropan-1-one. Examples of the optically active oxime system include 1-phenyl-1,1-propanedione-2- (o-ethoxycarbonyl) -oxime and the like. Examples of the benzoin group include benzoin and the like. Examples of the benzyl group include benzyl and the like. Examples of the benzophenone-based compound include benzophenone, benzoylbenzoic acid, 3,3'-methyl-4-methoxybenzophenone, polyvinylbenzophenone, and? -Hydroxycyclohexylbenzophenone. Examples of the ketal group include benzylmethyl ketal and the like. Examples of the thioxanthone system include thioxanthone, 2-chlorothioxanthone, 2-methylthioxanthone, 2,4-dimethylthioxanthone, isopropylthioxanthone, 2,4-dichlorothioxanthone , 2,4-diethylthioxanthone, 2,4-diisopropylthioxanthone, dodecylthioxanthone, and the like. Examples of the acylphosphine oxide system include diphenyl- (2,4,6-trimethylbenzoyl) phosphine oxide. The photopolymerization initiator may be used alone or in combination of two or more.

The amount of the photopolymerization initiator used is 0.05 to 1.5 parts by weight, preferably 0.1 to 1 part by weight based on 100 parts by weight of the mixture.

Hereinafter, a specific embodiment to which the present invention is applied to the terminal described in FIGS. 1 to 2B will be described.

1st Example

1) Preparation of ultraviolet curable coating composition for top sheet

(1) Synthesis of siloxane resin (SR4-2):

(3-trimethoxysilyl) propyl methacrylate (98%, Aldrich) and DMDMS (dimethoxydimethylsilane, 95%, Aldrich) were used. HCl (hydrochloric acid, 35 ~ 37% SAMCHUN Chem.) was used as an acid catalyst for hydrolysis and deionized water was used to hydrolysis the silane agent. EtOH (Ethanol, anhydrous, Aldrich) was used as a cosolvent to dissolve silane agent and deionized water.

First, 0.075 mol of silane agent, TMSPM, and 0.025 mol of DMDMS were added to the flask, and EtOH was added in the same amount as the amount of silane agent added. Then, deionized water for hydrolysis was added to the total number of alkoxy groups (-OR) of the silane agent and placed in a water bath set at 25 ° C. After stirring for 10 minutes, 1 mol% of HCl as a catalyst for hydrolysis was added to alkoxy group. Thereafter, the reaction was carried out at 25 ° C for 3 hours, then the water bath was heated to 65 ° C and further reacted for 15 hours. After 15 hours' reaction, EtOH used as a solvent and MeOH generated during the hydrolysis process were removed using a vacuum evaporator.

(2) Preparation of coating composition

10% by weight of HDDA, 10% by weight of TMPTA, 5% by weight of PETA, Irgacure 184 (trade name, manufactured by Mitsubishi Chemical Corporation), 20% by weight of a siloxane resin (SR4-2), 10% by weight of a hexahydric oligomer (PU610, (UV initiator, Ciba Specialty chemical), 0.5% by weight of TPO (UV initiator, Ciba Specialty chemical) and 0.8% of an additive (TEGO 440) were mixed to prepare an ultraviolet curable coating composition.

2) Manufacture of upper sheet coating film

The coating composition prepared by the above method is dripped onto a flat-panel molding sheet and covered with a conductor (a 0.3 mm thick PMMA sheet) to be coated. Then, a coating film having a thickness of about 5 mu m is formed by using a pressing roller, and then the coating film is cured by irradiating ultraviolet rays of 300 mj / cm < 2 > using LEV UV of 365 nm, and then the top sheet coating film is formed by releasing the flat sheet molding sheet.

3) Preparation of ultraviolet ray curable coating composition for bottom sheet

55 wt% of Albiflex 712 (silicone-epoxy copolymer, Nanoresins), 30 wt% of PETA, 10 wt% of HDDA, 4.5 wt% of Irgacure 184 (UV initiator, Ciba Specialty chemical), 0.5 wt% of TPO (UV initiator, Ciba Specialty chemical) % Were mixed to prepare an ultraviolet curable coating composition.

4) Manufacture of lower sheet coating film

Is the same as the method for manufacturing the upper sheet coating film.

5) Manufacture of ultraviolet ray curable resin for lamination

93% by weight of 2-ethylhexyl acrylate and 7% by weight of an acrylic elastomer (trade name: TOHPE: XF-5160) were added and stirred at 40 DEG C for 12 hours to completely dissolve XF-5160 in 2-ethylhexyl acrylate, . Then, 10 parts by weight of acrylic acid was added to 100 parts by weight of the mixture, and 0.3 part by weight of dipentaerythritol hexaacrylate (DPHA: Mi-won Chemical Co., Ltd.) was added to obtain diphenyl- (2 , 4,6-trimethylbenzoyl) phosphine oxide (0.4 part by weight), and 2-methyl-2-hydroxypropiophenone, 1- [4- (2-hydroxyethyl) phenyl] -2- Propan-1-one (Ciba Special Chemical) was added and stirred until homogeneous to prepare a composition.

6) Optical composite sheet laminate

The resin prepared in 5) is dropped onto the lower coating sheet, and then the upper coating sheet is covered. Then, a coating film having a thickness of about 100 탆 is formed by using a pressing roller, and then an ultraviolet ray of 800 mj / cm 2 is irradiated using LEV UV of 365 nm to form an optical composite sheet in which upper and lower plates are laminated.

Second Example

1) Preparation of ultraviolet curable coating composition for top sheet

10% by weight of TMPTA, 5% by weight of PETA, 30% by weight of silica sol (5 nm), 10% by weight of silica sol (SR4-2), 10% by weight of hexafunctional oligomer (PU610, 4.5% by weight of Irgacure 184 (UV initiator, Ciba Specialty chemical), 0.5% by weight of TPO (UV initiator, Ciba Specialty chemical) and 0.8% of an additive (TEGO 440) A composition was prepared.

2) Manufacture of upper sheet coating film

The coating composition prepared by the above method is dripped onto a flat-panel molding sheet and covered with a conductor (a 0.3 mm thick PMMA sheet) to be coated. Then, a coating film having a thickness of about 5 mu m is formed by using a pressing roller, and then the coating film is cured by irradiating ultraviolet rays of 300 mj / cm < 2 > using LEV UV of 365 nm, and then the top sheet coating film is formed by releasing the flat sheet molding sheet.

3) Preparation of ultraviolet ray curable coating composition for bottom sheet

55 wt% of Albiflex 712 (silicone-epoxy copolymer, Nanoresins), 30 wt% of PETA, 10 wt% of HDDA, 4.5 wt% of Irgacure 184 (UV initiator, Ciba Specialty chemical), 0.5 wt% of TPO (UV initiator, Ciba Specialty chemical) % Were mixed to prepare an ultraviolet curable coating composition.

4) Manufacture of lower sheet coating film

Is the same as the method for manufacturing the upper sheet coating film.

5) Manufacture of ultraviolet ray curable resin for lamination

93% by weight of 2-ethylhexyl acrylate and 7% by weight of an acrylic elastomer (trade name: TOHPE: XF-5160) were added and stirred at 40 DEG C for 12 hours to completely dissolve XF-5160 in 2-ethylhexyl acrylate, . Then, 10 parts by weight of acrylic acid was added to 100 parts by weight of the mixture, and 0.3 part by weight of dipentaerythritol hexaacrylate (DPHA: Mi-won Chemical Co., Ltd.) was added to obtain diphenyl- (2 , 4,6-trimethylbenzoyl) phosphine oxide (0.4 part by weight), and 2-methyl-2-hydroxypropiophenone, 1- [4- (2-hydroxyethyl) phenyl] -2- Propan-1-one (Ciba Special Chemical) was added and stirred until homogeneous to prepare a composition.

6) Optical composite sheet laminate

The resin prepared in 5) is dropped onto the lower coating sheet, and then the upper coating sheet is covered. Then, a coating film having a thickness of about 100 탆 is formed by using a pressing roller, and then an ultraviolet ray of 800 mj / cm 2 is irradiated using LEV UV of 365 nm to form an optical composite sheet in which upper and lower plates are laminated.

Third Example

1) Preparation of ultraviolet curable coating composition for top sheet

10% by weight of TMPTA, 5% by weight of PETA, 30% by weight of silica sol (5 nm), 10% by weight of silica sol (SR4-2), 10% by weight of hexahydric oligomer (PU610, 4.5% by weight of Irgacure 184 (UV initiator, Ciba Specialty chemical), 0.5% by weight of TPO (UV initiator, Ciba Specialty chemical) and 0.8% of an additive (TEGO 440) A composition was prepared.

2) Manufacture of upper sheet coating film

The coating composition prepared by the above method is dripped onto a flat-panel molding sheet and covered with a conductor (a 0.3 mm thick PMMA sheet) to be coated. Then, a coating film having a thickness of about 5 mu m is formed by using a pressing roller, and then the coating film is cured by irradiating ultraviolet rays of 300 mj / cm < 2 > using LEV UV of 365 nm, and then the top sheet coating film is formed by releasing the flat sheet molding sheet.

3) Preparation of ultraviolet ray curable coating composition for bottom sheet

55 wt% of Albiflex 712 (silicone-epoxy copolymer, Nanoresins), 30 wt% of PETA, 10 wt% of HDDA, 4.5 wt% of Irgacure 184 (UV initiator, Ciba Specialty chemical), 0.5 wt% of TPO (UV initiator, Ciba Specialty chemical) % Were mixed to prepare an ultraviolet curable coating composition.

4) Manufacture of lower sheet coating film

Is the same as the method for manufacturing the upper sheet coating film.

5) Manufacture of ultraviolet ray curable resin for lamination

93% by weight of 2-ethylhexyl acrylate and 7% by weight of an acrylic elastomer (trade name: TOHPE: XF-5160) were added and stirred at 40 DEG C for 12 hours to completely dissolve XF-5160 in 2-ethylhexyl acrylate, . Thereafter, the mixture was cooled to room temperature (25 캜), and 0.3 parts by weight of dipentaerythritol hexaacrylate (DPHA: Mi-won Chemical Co., Ltd.) was added to 100 parts by weight of the mixture to obtain diphenyl- (2,4,6-trimethylbenzoyl ) 0.4 part by weight of phosphine oxide and 0.1 part by weight of 2-methyl-2-hydroxypropiophenone and 1- [4- (2-hydroxyethyl) phenyl] -2-hydroxy- (Ciba Special Chemical) was added and stirred until homogeneous to prepare a composition.

6) Optical composite sheet laminate

The resin prepared in 5) is dropped onto the lower coating sheet, and then the upper coating sheet is covered. Then, a coating film having a thickness of about 100 탆 is formed by using a pressing roller, and ultraviolet light of 800 mj / cm 2 is irradiated using LEV UV of 365 nm to form an optical composite sheet laminated with upper and lower plates.

Hereinafter, methods and results of evaluating the properties of each of the above-described examples will be described.

≪ Property evaluation method &

[Light transmittance]

The transmittance was measured at a wavelength of 550 nm using a spectrophotometer MINOLTA CM-3600D, and the results are shown in Table 1.

[Pencil hardness test]

Hardness Tester Mitsumi Shisa The pencil lead was exposed in a cylindrical shape about 3 mm, polished so that the end of the core was flat and sharp, and then the pencil lead was applied at an angle of about 45 ° from the coating surface. The results are shown in Table 1.

[Yellow (ultraviolet) test]

15 W and UV-B wavelengths were covered with a black Tape. Half of the specimens were left at a distance of 20 cm from the lamp at 15 W and UV-B wavelengths for 72 hours. After 4 hours, discoloration was confirmed and the results are shown in Table 1

[Shock resistance test]

A steel ball (weight of about 130g) is offset 5mm from the outline of the cell phone folder window size, and a diagonal line connecting each corner to the line is drawn. Horizontal and vertical lines are drawn with respect to the point where the diagonal lines intersect. The results are shown in Table 1. The results are shown in Table 1. < tb >< TABLE >

[ANTI-SCRATCH test]

The surface of each of the specimens of Examples and Comparative Examples was rubbed in units of ten times under a weight of 175 g using Steel Wool # 0000, and the results are shown in the table of FIG.

The photocurable resin composition according to the present invention is photocurable and environmentally friendly when used on a plastic substrate such as PMMA (Polymethyl methacrylate), PC (Polycarbonate), PET (Polyethyleneterephthalate) It has excellent transparency, no warpage, has a surface hardness such as glass, less yellowing after coating, and has the advantage of saving energy compared to general thermosetting.

In addition, the composition and sheet according to the present invention can prevent breakage, which is a disadvantage of tempered glass, and lighten the product, and can be widely applied to products using conventional tempered glass.

For example, the present invention can provide an effect of solving defects and breakage in the processing of a window part of a touch screen product. In other words, it is possible to prevent breakage and scattering, which is the disadvantage of glass, while achieving light weight of the product, while utilizing the merits of ultra-light weight, excellent workability and impact resistance, It has the advantage of significantly reducing the weight of the screen product, and the plastic is superior in workability compared to glass, which can significantly increase the production yield due to defects and breakage.

In addition, since material cost is much lower than that of tempered glass, replacement cost can be greatly reduced.

In addition, the problem is that it is not possible to apply the display glass over a certain size because the size of the display glass is greatly enlarged and the yield is drastically lowered, and large-sized glass is very heavy and can not be carried by ordinary consumers. .

In addition, the glass has a problem in that it is difficult to join the outer case or the outer frames due to the difference in material, and when the joint is not perfect, dust or foreign matter penetrates through the gap, According to the present invention, since a plastic substrate can be used, a plastic of the same kind is very simple to join, and when it touches it, it is also permanent, so that the seam part which is sealed even in impact is not lifted or broken or opened.

The present invention can also be embodied as computer-readable codes on a computer-readable recording medium. A computer-readable recording medium includes all kinds of recording apparatuses in which data that can be read by a computer system is stored. Examples of the computer-readable recording medium include a ROM, a RAM, a CD-ROM, a magnetic tape, a floppy disk, an optical data storage device, and the like, and may be implemented in the form of a carrier wave (for example, transmission over the Internet) . In addition, the computer-readable recording medium may be distributed over network-connected computer systems so that computer readable codes can be stored and executed in a distributed manner. In addition, functional programs, codes, and code segments for implementing the present invention can be easily inferred by programmers of the technical field to which the present invention belongs.

It should be noted that the above-described apparatus and method are not limited to the configurations and methods of the embodiments described above, but the embodiments may be modified so that all or some of the embodiments are selectively combined .

Claims (7)

A mobile terminal including a display unit,
At least a part of the display part includes a multi-light guide sheet,
In the composite optical sheet,
UV (Ultraviolet Ray) photocurable resin layer;
An upper substrate layer provided on the upper surface of the UV photocurable resin layer and made of PMMA (poly (methylmethacrylate), polymethyl methacrylate);
A photocurable top coating layer provided on an upper surface of the upper substrate layer and coated with a material having a high hardness;
A lower base layer provided on the lower surface of the UV light cured resin layer and made of the PMMA or PC sheet (polycarbonate sheet); And
A photocurable undercoat layer provided on a lower surface of the lower substrate layer and made of a coating agent for providing a buffer function; ≪ / RTI >
Wherein the photocurable top coating layer comprises at least a part of a siloxane oligomer, a polyfunctional urethane acrylate oligomer, an acrylic monomer, a silica sol, a photoinitiator and a slip additive,
Wherein the photo-curable upper coating layer comprises 5 to 30% of the siloxane oligomer, 30 to 60% of the polyfunctional urethane acrylate oligomer, 10 to 50% of the acrylic monomer, 10 to 30% of the silacazole, 1 to 10 of the photoinitiator % Of the slip additive, and 1 to 10 wt% of the slip additive. delete delete The method according to claim 1,
Wherein the photocurable undercoat layer further comprises a silicone-epoxy copolymer initiator having a (meth) acrylate group introduced therein. The method according to claim 1,
Wherein the UV light curable resin layer further comprises a polyurethane acrylate oligomer, an acrylic reactive monomer, an allostomer and a photopolymerization initiator. A method of manufacturing a multi-light guide sheet included in at least a part of a display unit of a mobile terminal,
A first step of preparing a flat plate mold;
A second step of forming a coating layer by coating a coating material composed of an ultraviolet ray (UV) curable composition on the upper surface of the flat mold;
A third step of covering the upper surface with a coated conductor to form a base layer
A fourth step of pressing the lower surface of the flat mold and the upper surface of the base layer with a pressing roller;
A fifth step of irradiating ultraviolet rays at the top of the layered structure composed of the flat mold, the coating layer and the base layer to cure the layered structure;
Separating the flat mold from the cured layered structure to obtain a coating sheet composed of the coating layer and the base layer;
A seventh step of repeating the first to sixth steps to obtain a plurality of coated sheets;
An eighth step of applying an optical elastic pressure-sensitive adhesive between a first coating sheet of the plurality of coating sheets and a second coating sheet vertically inverted 180 degrees;
A ninth step of pressing a pressure-sensitive adhesive between the first coating sheet and the second coating sheet through the pressing roller to produce a multi-light guide sheet having a resin layer formed thereon; And
And curing the composite optical sheet by irradiating ultraviolet rays from the top of the composite optical sheet. The method according to claim 6,
In the ninth step, the thickness of the resin layer 300 is in the range of 50 to 100 μm,
Wherein the ultraviolet rays applied in the fifth and tenth steps are irradiated at a light amount of 200 to 1000 mJ / cm ^{2 at} a period of 0.1 second to 10 seconds.

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