KR101946363B1 - Display module, mobile terminal having it and manufacturing method display module - Google Patents

Abstract

A liquid crystal panel for outputting a desired color for each pixel, a backlight unit for uniformly emitting light on a lower surface of the liquid crystal panel, a light source for reflecting light incident on a side surface of the liquid crystal panel, And a blocking unit. The display module minimizes the light leakage caused by the light reflected from the side surface of the liquid crystal panel, thereby outputting clear and clear images.

Description

[0001] The present invention relates to a display module, a mobile terminal having the display module, and a method of manufacturing the display module,

To a display module including a light shielding portion capable of minimizing light leakage caused by light reflected on a side surface of a liquid crystal panel, a method of manufacturing the same, and a mobile terminal having the same.

Liquid crystal displays (LCDs) are gaining popularity as one of flat panel displays that can reduce weight and volume, which is a disadvantage of conventional CRT (cathode ray tube) monitors.

In general, a liquid crystal display is an apparatus for expressing an image by using optical anisotropy and birefringence characteristics of liquid crystal molecules. When an electric field is applied, the arrangement of liquid crystals changes, and the characteristic of transmission of light along the direction of the changed liquid crystal varies .

The liquid crystal display has a structure in which liquid crystal molecules are injected between a pair of glass substrates (a color filter layer and a lower substrate), and liquid crystal molecules injected between the pair of glass substrates are injected in a specific direction So that the light scattering amount is controlled.

BACKGROUND ART [0002] Liquid crystal displays are being used as display parts of monitors and terminals of desktop computers, other office or home appliances due to their lightweight, thin and low power consumption characteristics.

In particular, And can be divided into a mobile / portable terminal and a stationary terminal depending on whether the mobile terminal is a mobile terminal or a mobile terminal. 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. .

In recent years, liquid crystal displays have become more and more sensitive to light paths as they are used in simple flat display, and also in 3D display screens. Thus, defects that occur when the light path is abnormally distorted are a problem.

The present invention proposes a display module including a light shielding part capable of minimizing light leakage caused by light reflected on a side surface of a liquid crystal panel, a method of manufacturing the same, and a mobile terminal having the same, which is proposed in order to satisfy the above- .

It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory and are not restrictive of the invention, unless further departing from the spirit and scope of the invention as defined by the appended claims. It will be possible.

According to an aspect of the present invention, there is provided a liquid crystal display device including a liquid crystal panel for outputting a desired color for each pixel, a backlight unit uniformly emitting light on a lower surface of the liquid crystal panel, And a light shielding part for preventing the light from being emitted to the front surface of the display module.

According to another aspect of the present invention, there is provided a method of manufacturing a display device, comprising: forming a lower substrate on which a lower transparent electrode is formed and an upper substrate on which an upper transparent electrode and a color filter are formed; applying a sealant between the upper substrate and the lower substrate, Forming a liquid crystal panel by injecting liquid crystal between the lower substrate and the upper substrate, and applying a dark color ink to a side surface of the liquid crystal panel, A manufacturing method of a display module is provided.

According to another aspect of the present invention, there is provided a method of manufacturing a color filter, comprising: forming a lower substrate on which a lower transparent electrode is formed and an upper substrate on which an upper transparent electrode and a color filter are formed; applying a dark sealant between the upper substrate and the lower substrate, Cutting the bonded lower substrate and the upper substrate along a cutting line 1517 in a separate liquid crystal panel size, and injecting liquid crystal between the lower substrate and the upper substrate Wherein the black matrix is not formed on the cut end of the individual liquid crystal panel and a dark color sealant is applied to the cut end of the individual liquid crystal panel, Characterized in that said dark colored sealant-applied portion is not formed Module provides a process for producing the same.

According to the present invention, there is provided a liquid crystal display device including a front case having a through-hole formed on a front surface thereof, a liquid crystal panel for outputting a desired color for each pixel, a backlight unit uniformly emitting light to the bottom surface of the liquid crystal panel, And a rear case coupled to the front case and covering a rear surface of the display unit.

The display module according to an exemplary embodiment of the present invention minimizes the light leakage caused by light reflected from the side surface of the liquid crystal panel, thereby outputting clear and clear images.

In addition, by partially making the mold darker, the light leakage phenomenon caused by the mold can be blocked.

The effects obtained by the present invention are not limited to the above-mentioned effects, and other effects not mentioned can be clearly understood by those skilled in the art from the following description will be.

1 is a block diagram of a mobile terminal according to an embodiment of the present invention.
2 is a front perspective view of a mobile terminal according to an aspect of the present invention.
3 is a rear perspective view of a mobile terminal according to an aspect of the present invention.
4 is an exploded perspective view of a mobile terminal according to an aspect of the present invention.
5 is an exploded perspective view of a display module according to another aspect of the present invention.
6 is a cross-sectional view illustrating one embodiment of a display module according to another aspect of the present invention.
7 is a flowchart showing an embodiment of a manufacturing method of the display module shown in FIG.
8 is a cross-sectional view illustrating a manufacturing method of another embodiment of a display module according to another aspect of the present invention.
9 is a cross-sectional view showing an embodiment of a manufacturing method of the display module shown in FIG.
10 is a flowchart showing an embodiment of a manufacturing method of the display module shown in FIG.
11 is a cross-sectional view of a conventional display panel.

Hereinafter, a mobile terminal related to the present invention will be described in detail with reference to the drawings. The suffix " module " and " part " for the components used in the following description are given or mixed in consideration of ease of specification, and do not have their own meaning or role.

The mobile terminal described in this specification may include a mobile phone, a smart phone, a laptop computer, a digital broadcasting terminal, a PDA (Personal Digital Assistants), a PMP (Portable Multimedia Player), navigation and the like. However, it will be understood by those skilled in the art that the configuration according to the embodiments described herein may be applied to a fixed terminal such as a digital TV, a desktop computer, and the like, unless the configuration is applicable only to a mobile terminal.

1 is a block diagram of a mobile terminal according to an embodiment of the present invention.

The mobile terminal 100 includes a wireless communication unit 110, an audio / video input unit 120, a user input unit 130, a sensing unit 140, an output unit 150, a memory 160, A controller 170, a controller 180, a power supply 190, and the like. The components shown in FIG. 1 are not essential, and a mobile terminal having more or fewer components may be implemented.

Hereinafter, the components will be described in order.

The wireless communication unit 110 may include one or more modules for enabling wireless communication between the mobile terminal 100 and the wireless communication system or between the mobile terminal 100 and the network in which the mobile terminal 100 is located. For example, the wireless communication unit 110 may include a broadcast receiving module 111, a mobile communication module 112, a wireless Internet module 113, a short range communication module 114, and a location information module 115 .

The broadcast receiving module 111 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. Two or more broadcast receiving modules may be provided to the mobile terminal 100 for simultaneous broadcast reception or broadcast channel switching for at least two broadcast channels.

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 means information related to a broadcast channel, a broadcast program, or 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 112.

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 111 may be a Digital Multimedia Broadcasting-Terrestrial (DMB-T), a Digital Multimedia Broadcasting-Satellite (DMB-S), a Media Forward Link Only (Mobile Broadcasting Business Management System), ISDB-T (Integrated Services Digital Broadcasting (ISDB-T)), Digital Multimedia Broadcasting (MBMS) Digital Broadcast-Terrestrial) or the like. Of course, the broadcast receiving module 111 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 111 may be stored in the memory 160.

The mobile communication module 112 may be coupled to a base station, an external terminal, or a server on a mobile communication network, such as, but not limited to, Gobal System for Mobile communications (GSM), Code Division Multiple Access (CDMA), Wideband CDMA Transmits and receives wireless signals with one. 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 113 is a module for wireless Internet access, and may be built in or externally attached to the mobile terminal 100. Wireless Internet technologies include WLAN (Wi-Fi), Wibro (Wireless broadband), Wimax (World Interoperability for Microwave Access), HSDPA (High Speed Downlink Packet Access), GSM, CDMA, WCDMA, LTE Evolution (but not limited to) may be used.

The wireless Internet module 113, which performs wireless Internet access through the mobile communication network, is connected to the mobile communication module 110 through the mobile communication network, for example, from the viewpoint that the wireless Internet access by Wibro, HSDPA, GSM, CDMA, WCDMA, LTE, (112). ≪ / RTI >

The short-range communication module 114 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 a short range communication technology.

The position information module 115 is a module for obtaining the position of the mobile terminal, and a representative example thereof is a Global Position System (GPS) module. According to the current technology, the GPS module 115 calculates distance information and accurate time information from three or more satellites, and then applies trigonometry to the calculated information to obtain 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 115 can calculate speed information by continuously calculating the current position in real time.

Referring to FIG. 1, an A / V (Audio / Video) input unit 120 is for inputting an audio signal or a video signal, and may include a camera 121 and a microphone 122. The camera 121 processes image frames such as still images or moving images obtained by the image sensor in the video communication mode or the photographing mode. The processed image frame can be displayed on the display unit 151. [

The image frame processed by the camera 121 may be stored in the memory 160 or transmitted to the outside through the wireless communication unit 110. [ Two or more cameras 121 may be provided depending on the use environment.

The microphone 122 receives an external sound signal through 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. Various noise reduction algorithms may be implemented in the microphone 122 to remove noise generated in receiving an external sound signal.

The user input unit 130 generates input data for a user to control the operation of the terminal. The user input unit 130 may include a button 136 located on the front, rear, or side of the mobile terminal 100, and a touch sensor (static / static) 137. Although not shown, ), A dome switch, a jog wheel, a jog switch, and the like.

The sensing unit 140 senses the current state of the mobile terminal 100 such as the open / close state of the mobile terminal 100, the position of the mobile terminal 100, the presence or absence of user contact, the orientation of the mobile terminal, And generates a sensing signal for controlling the operation of the mobile terminal 100. For example, when the mobile terminal 100 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 power supply unit 190 is powered on, whether the interface unit 170 is connected to an external device, and the like. Meanwhile, the sensing unit 140 may include a proximity sensor 141. (The proximity sensor will be described later).

The output unit 150 is for generating output related to the visual, auditory or tactile sense and includes a display unit 151, an audio output module 152, an alarm unit 153, and a haptic module 154 .

The display unit 151 displays (outputs) information processed by the mobile terminal 100. For example, when the mobile terminal is in the call mode, a UI (User Interface) or a GUI (Graphic User Interface) associated with a call is displayed. When the mobile terminal 100 is in the video communication mode or the photographing mode, the photographed and / or received video or UI and GUI are displayed.

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 display, and a 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 unit 151 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 unit 151 of the terminal body.

There may be two or more display units 151 according to the embodiment of the mobile terminal 100. For example, in the mobile terminal 100, a plurality of display portions may be spaced apart from one another or may be disposed integrally with each other, or may be disposed on different surfaces.

In the case where the display unit 151 and the touch sensor 137 have a mutual layer structure or are integrally formed (hereinafter referred to as a 'touch screen'), the display unit 151 may be used as an input device . The touch sensor may be stacked on the display unit 151 to form a layer structure when the touch sensor has a form of a touch film, a touch sheet, a touch pad, or the like. ≪ / RTI >

The touch sensor may be configured to convert a change in a pressure applied to a specific portion of the display unit 151 or a capacitance generated in a specific portion of the display unit 151 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 the corresponding data to the controller 180. Thus, the control unit 180 can know which area of the display unit 151 is touched or the like.

The proximity sensor 141 may be disposed in an inner region of the mobile terminal or in the vicinity of the touch screen, which is enclosed by 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 contacting the pointer on the touch screen may be referred to as " contact touch. &Quot; The location where the pointer is proximately touched on the touch screen may refer to a position where the pointer corresponds vertically 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 152 may output audio data received from the wireless communication unit 110 or stored in the memory 160 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 152 also outputs sound signals related to functions (e.g., call signal reception sound, message reception sound, etc.) performed in the mobile terminal 100. [ The audio output module 152 may include a receiver, a speaker, a buzzer, and the like.

The alarm unit 153 outputs a signal for notifying the occurrence of an event of the mobile terminal 100. Examples of events that occur in the mobile terminal include call signal reception, message reception, key signal input, touch input, and the like. The alarm unit 153 may output a signal for notifying the occurrence of an event in a form other than the video signal or the audio signal, for example, vibration. In this case, the display unit 151 and the sound / voice output module 152 may be a kind of the alarm unit 153. The display unit 151 and the sound / . ≪ / RTI >

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 the vibration, the haptic module 154 may include a pin arrangement vertically moving with respect to the contact skin surface, a spraying force or a 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 154 can be implemented not only to transmit the tactile effect through the direct contact but also to allow the user to feel the tactile effect through the muscular sensation of the finger or arm. At least two haptic modules 154 may be provided according to the configuration of the mobile terminal 100.

The memory unit 160 may store a program for processing and controlling the control unit 180 and temporarily store the input / output data (e.g., telephone directory, message, audio, For example. The memory unit 160 may store the frequency of use of each of the data (for example, each telephone number, each message, and frequency of use for each multimedia).

In addition, the memory unit 160 may store data on vibration and sound of various patterns output when the touch is input on the touch screen.

The memory 160 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), a RAM (Random Access Memory), SRAM (Static Random Access Memory), ROM (Read Only Memory), EEPROM (Electrically Erasable Programmable Read-Only Memory), PROM A disk, and / or an optical disk. The mobile terminal 100 may operate in association with a web storage that performs a storage function of the memory 160 on the Internet.

The interface unit 170 serves as a path for communication with all external devices connected to the mobile terminal 100. The interface unit 170 receives data from an external device or supplies power to each component in the mobile terminal 100 or transmits data to the 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 use right of the mobile terminal 100 and includes a user identification module (UIM), a subscriber identity 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 100 through the port.

When the mobile terminal 100 is connected to an external cradle, the interface unit may be a path through which power from the cradle is supplied to the mobile terminal 100, or various command signals input by the user to the cradle may be transmitted It can be a passage to be transmitted to the terminal. The various command signals or the power source input from the cradle may be operated as a signal for recognizing that the mobile terminal is correctly mounted on the cradle.

The controller 180 typically controls the overall operation of the mobile terminal. For example, voice communication, data communication, video communication, and the like. The control unit 180 may include a multimedia module 181 for multimedia playback. The multimedia module 181 may be implemented in the control unit 180 or may be implemented separately from the control unit 180. [

The controller 180 may perform a pattern recognition process for recognizing handwriting input or drawing input performed on the touch screen as characters and images, respectively.

The power supply unit 190 receives external power and internal power under the control of the controller 180 and supplies power necessary for operation of the respective components. The power supply unit 190 may include, for example, a battery, a connection port, a power supply control unit, and a charge monitoring unit.

The battery may be an internal battery configured to be chargeable, and may be detachably coupled to the terminal body for charging or the like. The connection port may be configured as an example of an interface 170 through which an external charger for supplying power for charging the battery is electrically connected.

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 180 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 160 and can be executed by the control unit 180. [

FIG. 2 is a perspective view of a mobile terminal or a portable terminal according to the present invention, as viewed from the front.

The disclosed mobile terminal 100 includes a bar-shaped terminal 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 of the mobile terminal 100 includes a casing 101, 102, In this embodiment, the case may be divided into a front case 101 and a rear case 102. [ A variety of electronic components are embedded in the space formed between the front case 101 and the rear case 102.

 In some cases, electronic components may be mounted on the surface of the rear case 102 as well. Electronic components mounted on the surface of the rear case 102 include a battery, a USIM card, a memory card, and the like which are detachable by the user. At this time, the rear case 102 may further include a rear cover 103 for covering the surface thereof. When the rear cover 103 is removed, the surface of the rear case 102 is exposed.

As shown in FIG. 2, when the rear cover 103 is coupled, only a part of the side surface of the rear case 102 may be exposed. When the size of the rear cover 103 is reduced, Some may also be exposed. And an opening 103 'for exposing the camera 121' or the sound output unit 152 'to the outside when the rear cover 103 covers the entire rear surface of the rear case 102.

The cases 101, 102, and 103 may be formed by injection molding synthetic resin or may be formed of a metal material such as stainless steel (STS) or titanium (Ti).

The display unit 151, the sound output unit 152, the camera 121, the user input units 130/131 and 132, the microphone 122, and the interface 170 may be disposed in the terminal cases 101 and 102.

The display unit 151 occupies most of the main surface of the front case 101. A sound output unit 152 and a camera 121 are disposed in an area adjacent to one end of both ends of the display unit 151 and a user input unit 131 and a microphone 122 are disposed in an area adjacent to the other end. The user input unit 132 and the interface 170 may be disposed on the side surfaces of the front case 101 and the rear case 102. [

The user input unit 130 is operated to receive a command for controlling the operation of the mobile terminal 100 and may include a plurality of operation units 131, 132, and 133. The operation units 131, 132, and 133 may be collectively referred to as a manipulating portion.

The contents inputted by the first or second operation unit 131 or 132 may be variously set. For example, the first operation unit 131 receives a command such as start, end, scroll, and the like, and the second operation unit 132 inputs a command such as adjustment of the sound output from the sound output unit 152 And the third operation unit 133 can receive commands such as activation / deactivation of the touch recognition mode of the display unit 151 and the like.

In addition to the display unit 151, the operation units 131, 132, and 133 may be provided with touch sensors, It is also possible to receive a command of the user by touch alone.

3 is a rear perspective view of the mobile terminal shown in FIG.

Referring to FIG. 3, a camera 121 'may be further mounted on the rear surface of the terminal body, that is, the rear case 102. The camera 121 'may have a photographing direction substantially opposite to the camera 121 (see FIG. 2), and may be a camera having the same or different pixels as the camera 121.

For example, the camera 121 may have a low pixel so that the face of the user can be photographed and transmitted to the other party in case of a video call or the like, and the camera 121 ' It is preferable to have a large number of pixels. The cameras 121 and 121 'may be installed in the terminal body such that they can be rotated or pop-up.

A flash 123 and a mirror 124 may be additionally disposed adjacent to the camera 121 '. The flash 123 illuminates the subject when the subject is photographed by the camera 121 '. The mirror 124 allows the user to illuminate the user's own face or the like when the user intends to shoot himself / herself (self-photographing) using the camera 121 '.

An acoustic output 152 'may be additionally disposed on the rear surface of the terminal body. The sound output 152 'on the rear side of the body may implement the stereo function together with the sound output 152 (see FIG. 2) of the front side of the body, and may be used for the implementation of the speakerphone mode during a call.

4 is an exploded perspective view of a mobile terminal according to an aspect of the present invention. The mobile terminal 100 according to an embodiment of the present invention includes a case 101 and 102 forming an outer appearance, a display module 151 disposed inside the case and displaying image information, And a frame 108.

The case may include a front case 101 and a rear case 102 coupled to the front case 101. The front case 101 is formed with a through window 101a. The through window may include a display module 151 and a glass 1011 covering the through window to protect the front surface of the display module 151.

The frame 108 is a member that engages with the case so that the display module 151 is fixed to the through window, and supports the rear surface of the display module 151. The frame 108 is coupled with the case to firmly fix the display module 151 to the through window 101a on the front surface of the case 101. [ Various materials such as a metal material and a reinforced plastic can be used as the material of the frame 108.

The display module 151 includes a liquid crystal panel 1510 for outputting colors for each pixel to provide various images to a user, a backlight unit 1520 for supplying uniform light to the liquid crystal panel, A mold 1530 covering the periphery of the backlight unit 1520 and light blocking portions 1557 and 1558 for preventing light leakage.

Unlike the conventional display module 151, the display module 151 of the present invention is characterized by having a light shielding part. The light shielding part is for preventing light leakage, and light leakage phenomenon is incident on a path other than the normal path in which the light is incident on the liquid crystal panel 1510 from the backlight unit 1520 to affect the image output from the display module 151 It means giving.

Particularly, in the present invention, light reflected from the side surface of the liquid crystal panel 1510 is prevented from being leaked to the front surface of the liquid crystal panel 1510. The angle of incidence of the light reflected from the side surface of the liquid crystal panel 1510 The image may be distorted due to a difference from the light supplied from the backlight unit 1520, a difference in brightness, and unevenness of the screen may occur.

Hereinafter, a display module and a manufacturing method thereof according to the present invention will be described with reference to FIGS. 5 to 10. FIG.

5 is an exploded perspective view of a display module 151 according to another aspect of the present invention, in which a liquid crystal panel 1510, a backlight unit 1520, and a mold 1530 are shown.

The liquid crystal panel 1510 is characterized in that a signal is applied to the transistor to induce a phase change of the applied liquid crystal to output a desired color for each pixel. The liquid crystal substrate is composed of two transparent substrates 1511 and 1512 and a liquid crystal layer 1514 interposed therebetween.

A transparent upper electrode is formed on the upper substrate 1511, and a transparent lower electrode is formed on the lower substrate 1512. The upper substrate 1511 may be referred to as a color filter layer including a color filter for displaying hues. And controls the voltages of the upper electrode and the lower electrode to change the arrangement of the liquid crystal to selectively transmit light supplied from the backlight unit 1520 on the rear side.

 The backlight unit 1520 is positioned below the liquid crystal panel 1510 and uniformly supplies light toward the liquid crystal panel 1510. The backlight unit 1520 includes a light source 1521 for supplying light to the light guide plate 1521, 1522).

The light guide plate 1521 is made of a transparent material, for example, a transparent acrylic panel. Various patterns may be formed on the surface in order to uniformly supply light supplied from the light source 1522 to the entire surface of the liquid crystal panel 1510 and a prism film or a reflective film 1523 may be attached to the surface.

The light source 1522 supplies light to the light guide plate 1521 and the light source 1522 in the form of an LED is illustrated in FIG. 5. However, the light source 1522 can be variously used. Also, the position of the light source 1522 is not limited to the side surface of the light guide plate 1521 as shown in FIG. 5, and may be formed at various positions.

The mold 1530 includes a panel supporting portion 1531 in which the backlight unit 1520 is inserted in the center and the upper surface of which is coupled to a bottom surface of the liquid crystal panel 1510 and a liquid crystal panel 1510 And a side wall portion 1532 extending in the front direction so as to cover the side surface of the side wall portion 1532. [

Referring to FIG. 6, which is a cross-sectional view illustrating a first embodiment of a display panel of the present invention, a cross section of a mold 1530 is shown. The panel supporting portion 1531 of the mold 1530 surrounds the backlight unit 1520 and the upper surface of the panel 1530 contacts the circumference of the lower surface of the liquid crystal panel 1510 to fix the backlight unit 1520 and the liquid crystal panel 1510 .

In addition, light can be prevented from leaking between the engaging portions of the mold by bonding the upper surface of the panel supporting portion 1531 and the liquid crystal panel 1510 using a dark color adhesive pad or an adhesive 1533.

A side wall portion 1532 extending in the front direction so as to cover the side surface of the liquid crystal panel 1510 from the panel supporting portion 1531 protects the side surfaces of the liquid crystal panel 1510 and the backlight unit 1520, And supports a force to be pressed by the spring 1011.

A buffer pad 1012 made of an elastic material may be further provided between the mold 1530 and the front glass 1011 to mitigate the impact when an external impact is applied. The glass 1011 is positioned on the top of the mold 1530 but the end of the case 101 may be located on the top of the mold 1530. [

However, a light leakage phenomenon may occur in a display module having such a structure. As shown in FIG. 11, the side surface of the liquid crystal panel 1510 has a refractive index different from that of the side facing the air, so that light incident on the side surface of the liquid crystal panel 1510 may be reflected.

As described above, the light reflected from the side of the liquid crystal panel 1510 may be different from the case where the angle is normal, and may cause blurring or unevenness on the screen. Especially in the recently developed 3D display, as the thickness of the display becomes thick, such light leakage phenomenon becomes more problematic.

The present invention includes light blocking portions 1557 and 1558 for preventing light incident on a side surface of the liquid crystal panel 1510 from being reflected and being emitted to the front surface of the liquid crystal panel 1510.

6 is a cross-sectional view showing one embodiment of the display module 151 of the present invention, and shows a dark color light shielding portion 1557 formed on the side surface of the liquid crystal panel 1510. [ The light blocking portion 1557 absorbs light incident on the side surface of the liquid crystal panel 1510 in a dark color without reflecting it.

Since the thickness of the side surface of the liquid crystal panel 1510 is very thin, it is preferable to use the printing method because it is difficult to attach the film. There are a variety of printing methods using ink, but ink jet printing methods can be used in which a force is applied to the side of a thin liquid crystal panel 1510 to reduce the risk of breakage.

Hereinafter, a method of manufacturing the display module 151 including the light shielding part 1557 shown in FIG. 6 will be described with reference to FIG. First, an upper substrate 1511 and a lower substrate 1512 are manufactured.

A lower substrate 1512 having a lower transparent electrode and a lower substrate 1512 having an upper transparent electrode and a color filter are formed (S110). The upper substrate 1511 and the lower substrate 1512 include a transparent electrode as described above, and a transparent electrode pattern is formed by laminating an ITO film on a glass substrate and selectively removing the ITO film using a high photosensitizer .

A sealant is applied between the upper substrate 1511 and the lower substrate 1512 to bond the upper substrate 1511 and the lower substrate 1512 together at step S120.

Since the sealant is applied to the periphery of the individual panel, it can be formed by a screen printing method. At this time, the upper transparent electrode and the lower transparent electrode may be electrically connected to each other, or a spacer may be interposed between the upper substrate 1511 and the lower substrate 1512 to maintain a gap therebetween. Spacers for maintaining the spacing are scattered on the upper substrate 1511 and the lower substrate 1512 so that the spacing between both substrates is uniformly maintained.

The upper substrate 1511 and the lower substrate 1512 are aligned with each other, and the sealing parts 1513 are formed by laminating the upper substrate 1511 and the lower substrate 1512 using the sealant and curing the sealant by applying a predetermined pressure and temperature. At this time, when a plurality of liquid crystal substrates are formed at the same time, a step of cutting to the size of the individual liquid crystal panel 1510 is further required.

Next, liquid crystal is injected between the lower substrate 1512 and the upper substrate 1511 to form a liquid crystal panel 1510 (S130). There are various methods of injecting the liquid crystal through the liquid crystal injection hole, but generally, a method of making the space between both the substrates to be vacuumed and then using the pressure difference to suck the liquid crystal into the inside is the most used. After the liquid crystal is injected, the liquid crystal injection hole is sealed to form the liquid crystal panel 1510.

Next, a dark color ink is applied to the side surface of the liquid crystal panel 1510 to form a light shielding portion 1557 (S160). Screen printing, stamping, or the like may be used for the ink application method, but ink may penetrate into the liquid crystal panel 1510 or the liquid crystal panel 1510 may be damaged by pressure. In order to prevent this, ink can be applied to the side surface of the liquid crystal panel 1510 by a digital printer using an inkjet method.

A plurality of liquid crystal panels 1510 may be stacked (S140) and simultaneously ink may be applied to shorten the time for ink application and to minimize breakage of the liquid crystal panel 1510. [ In addition, at least one of the front surface and the rear surface of the liquid crystal panel 1510 may be taped and protected to prevent ink from being applied to areas other than the side surface of the liquid crystal panel 1510 (S150).

Next, the applied ink is dried (S170). The heat is applied to dry, i.e., cure, the ink, and is preferably performed in a range of 60 ° C to 70 ° C. Since the state of the ink may change at a high temperature of 70 캜 or higher, thermal curing can be performed at a lower temperature. In order to completely block the light leakage, the light blocking portion 1557 must have a sufficient thickness, so that the ink is repeatedly applied and dried (S180). Experimentally, the light leakage was blocked when applied more than 4 times.

After the application of the ink, it is left to stand for a predetermined time, for example, for 24 hours to complete the curing. Then, a backlight unit 1520 is coupled to the rear surface of the liquid crystal panel 1510, and a mold is coupled to form a display module (S190).

The display module thus manufactured can minimize the light leakage caused by the light reflected from the side of the liquid crystal panel 1510, thereby outputting clear and clear images. The above-described display module may be used in an apparatus having a mobile terminal and various display units.

8 is a cross-sectional view illustrating another embodiment of the display module 152 of the present invention. In this embodiment, the light blocking portion 1558 is provided between the upper substrate 1511 and the lower substrate 1512 of the liquid crystal panel 1510 And is a black sealing portion 1513 located at the bottom of the housing.

The black matrix portion formed on the color filter of the upper substrate 1511 is configured in a dark color to absorb light. If the black matrix extends to the end of the liquid crystal panel 1510, most of the light reflected from the side surface of the lower substrate 1512 or the sealing portion 1513 can be blocked, thereby preventing light leakage.

Since the size of the liquid crystal panel 1510 used in the mobile terminal is small, a plurality of modules are formed at one time and then cut into individual pieces. If a black matrix is formed to the end of the liquid crystal panel 1510 in order to prevent light reflection on the side of the liquid crystal panel 1510, the black matrix should be formed to extend to a cutting line 1517 for cutting into individual modules, Sealant should be applied and adhered to the lower substrate 1512.

If the black matrix is extended to the cutting line 1517, the sealant does not directly adhere to the upper substrate 1511 but touches only the black matrix, thereby deteriorating the adhesion between the upper substrate 1511 and the lower substrate 1512. In addition, in the operation of cutting into individual modules, the black matrix portion may be cut off, and some portions may be torn off, resulting in foreign matter failure.

In the present invention, a black matrix is not formed on the cutting line 1517 to avoid such a defect, and instead, a light blocking portion 1558 is formed by using a dark color sealant.

As shown in FIG. 8, when the light shielding portion 1558 having a dark color of the sealant is a light reflected from the side surface of the lower substrate 1512 or a sealing portion 1513 having a light transmitting property, The light to be incident on the side wall of the substrate 1511 is cut off and the light leakage phenomenon reflected on the side of the liquid crystal panel 1510 can be blocked.

In addition, since the conventional mold 1530 generally uses a bright color extrusion such as white, the mold 1530 covers the side surface of the backlight unit 1520, 1530). The light emitted by the mold 1530 can be incident on the liquid crystal panel 1510 again, which also causes a light leakage phenomenon.

In the case of omitting the side wall of the mold in order to prevent light leakage by the mold, light is reflected inside the mold and is not incident on the liquid crystal panel 1510. However, the side of the mold can not be protected, The edges of the liquid crystal panel 1510 may be damaged.

When the entirety of the mold is formed in black, light emitted from the side of the backlight unit is not absorbed by the mold and is not emitted to the liquid crystal panel 1510, but light reflected from the panel support of the mold back to the backlight unit 1520 There is a problem of absorbing all. That is, the brightness of the display module 151 is reduced.

The liquid crystal panel 1510 of the side wall portion 1532 of the mold 1530 may be provided with a side wall portion 1532 facing the side of the liquid crystal panel 1510 in order to prevent light leakage by the mold without lowering the brightness of the display module 151, The surface to be formed can be formed into a dark color such as black.

The dark color portion inside the side wall portion can be realized by a double injection method or a method of applying ink.

Hereinafter, a method of manufacturing the display module of FIG. 8 will be described with reference to FIG.

First, an upper substrate 1511 and a lower substrate 1512 are manufactured (S210), and a sealing agent is applied between the upper substrate 1511 and the lower substrate 1512 to form an upper substrate 1511 and a lower substrate 1512, (S220). Since this process is the same as steps S110 to S120 shown in FIG. 7, detailed description will be omitted.

Next, the individual liquid crystal panel 1510 is cut (S230). In the portion of the cutting line 1517, a black matrix is not formed, and a portion where a black sealant is formed as shown in FIG. 10 is cut using a laser or the like. Since the color of the sealant is darkened, the adhesive force is maintained, and the sealing portion 1513 for the liquid crystal layer can sufficiently function.

Generally, when an alignment mark for aligning each side is printed on the cutting line 1517 and the sealing portion 1513 is made dark, there is a problem that such an alignment mark is not easily seen, If the mark is formed in a bright color, the position can be aligned during stacking.

If the sealing portion 1513 is formed using a dark color sealant, since the UV curing can not be performed when the sealant is cured, the dark sealing portion 1513, that is, the light blocking portion 1558, And is cured.

Next, a liquid crystal is injected between the upper substrate 1511 and the lower substrate 1512 to form a liquid crystal panel 1510 (S230). This is the same as the step S130 of the embodiment related to Fig. 7 described above, so a detailed description will be omitted.

The display module according to an exemplary embodiment of the present invention minimizes the light leakage caused by the light reflected from the side surface of the liquid crystal panel 1510, thereby outputting clear and clear images.

Further, by partially making the mold darker, the light leakage phenomenon caused by the mold can be blocked.

It will be apparent to those skilled in the art that the present invention may be embodied in other specific forms without departing from the spirit or essential characteristics thereof.

Accordingly, the above description should not be construed in a limiting sense in all respects and should be considered illustrative. The scope of the present invention should be determined by rational interpretation of the appended claims, and all changes within the scope of equivalents of the present invention are included in the scope of the present invention.

100: mobile terminal 110: wireless communication unit
120: A / V input / output unit 130: user input unit
140: sensing unit 150: output unit
160: memory 170: interface section
180: control unit 190: power supply unit
101: front case 102: rear case
108: frame 200: print pad
1011: front glass 1012: pad
151: display module 1510: liquid crystal panel
1511: upper substrate
1512: Lower substrate 1513: Sealing part
1514: liquid crystal layer 1520: backlight unit
1521: light guide plate 1522: light source
1523: reflective film 1530: mold
1531: panel supporting portion 1532:
1557, 1558:

Claims (19)

delete delete delete delete delete delete delete delete delete delete delete Forming a lower substrate on which a lower transparent electrode is formed and an upper substrate on which an upper transparent electrode and a color filter are formed;
Applying a dark sealant between the upper substrate and the lower substrate to bond the upper substrate and the lower substrate;
Printing an align mark for cutting the boundary of each module with light color ink on a sealing portion formed by curing the sealant;
Cutting the laminated lower substrate and the upper substrate along the alignment mark with a size of a separate liquid crystal panel; And
And injecting liquid crystal between the lower substrate and the upper substrate to form a liquid crystal panel,
Wherein a black matrix is not formed on the cut-out portion of the individual liquid crystal panel. 13. The method of claim 12,
Wherein the sealant is a thermosetting material that is cured by heat. delete delete delete delete delete delete

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