KR20150004192A - Display device and control method thereof - Google Patents

Abstract

The present invention relates to a display device which can be mounted on a head portion and a control method thereof. The display device according to an embodiment of the present invention comprises: a main body which is formed to be mountable on a head portion; a display unit which is coupled with the main body and arranged at positions corresponding to both eyes and overlaps and displays visual information on an inputted external image; and a control unit which generates a control command for adjusting a transparency of the display unit, wherein the display unit can adjust the transparency according to the control command to adjust sharpness of the inputted external image.

Description

DISPLAY APPARATUS AND CONTROL METHOD THEREFOR [0002]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a display device, and more particularly, to a display device that can be mounted on a head and a control method thereof.

As the information age rapidly develops, the importance of a display device realizing a realistic screen has been emphasized. For example, there is a head mounted display (HMD).

Tofu-mounted display devices are mainly made of safety goggles or helmet-type devices to see the screen in front of them and have been developed to realize virtual reality. Head-mounted display device A method of projecting an image by installing a small-sized display such as a liquid crystal at a position close to both eyes (both eyes) is common and is currently being used for space development, nuclear reactor, military or medical institution, And so on.

Due to such improvements, smart glasses have been introduced as an embodiment of a head-mounted display device. The smart glasses implemented as a wearable device can easily perform the functions performed in the existing mobile terminal.

However, when the smart glasses are worn, external images viewed through the smart glasses and output visual information are displayed together, which may make it difficult to recognize the visual information. In addition, the content is displayed on the lens of the transparent smart glasses, so that contents that are private or security-requiring may be exposed to others.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a display device and a control method thereof that can improve a user's convenience by adjusting a light transmittance of a display portion.

According to an aspect of the present invention, there is provided a display device including: a body formed to be mountable on a head; A display unit disposed at a position corresponding to both eyes in association with the main body, for superimposing time information on an input external image; And a control unit for generating a control command for controlling the transparency of the display unit. The display unit may adjust the transparency according to the control command to adjust the sharpness of the inputted external image.

In an embodiment, the control unit may generate a control command for controlling the transparency according to the content output as the time information.

In an exemplary embodiment, the display unit may output only the time information excluding the input external image by adjusting the transparency according to the control command.

In an embodiment, the control unit may generate a control command for adjusting the transparency according to an amount of light detected from the outside.

In an embodiment, the control unit may generate a control command for adjusting the transparency according to a preset condition.

In an embodiment, the control unit may generate a control command for adjusting the transparency according to a locked state and an unlocked state.

In an embodiment, the control unit may generate a control command for adjusting the transparency according to an input of a predetermined external command.

According to an embodiment of the present invention, there is provided a method of controlling a display apparatus, the method comprising: (a) superimposing time information on an external image input through a display unit; (b) generating a control command for controlling transparency of the display unit; And adjusting a degree of transparency according to the control command to adjust the sharpness of the input external image, wherein the display unit includes: a body coupled to a body formed to be mountable on the head, As shown in FIG.

In one embodiment of the present invention, the step (b) may include generating a control command for adjusting the transparency according to the content output as the time information.

In one embodiment of the present invention, the step (c) may include outputting only the time information excluding the input external image by adjusting the transparency according to the control command.

In one embodiment of the present invention, the step (b) may include generating a control command for controlling the transparency according to an amount of light detected from the outside.

In one embodiment of the present invention, the step (b) may include generating a control command for adjusting the transparency according to a predetermined condition.

In an embodiment, the step (b) may include generating a control command for adjusting the transparency according to a locked state and an unlocked state.

In one embodiment of the present invention, the step (b) may include generating a control command for adjusting the transparency according to an input of a predetermined external command.

According to the present invention, the transparency of the display unit can be adjusted. Accordingly, it is possible to output time information to a full display instead of an Augmented Reality (AR) display, and it is possible to prevent private information or security-required contents from being exposed to others.

In addition, the function of the sunglasses can be performed by adjusting the transparency level according to the amount of external light. This eliminates the need for a separate detachable sunglass to be mounted on the existing smart glasses and provides a more suitable transparency considering the amount of ambient light compared to detachable sunglasses that uniformly control the amount of light.

And, the lock state and the unlock state can be intuitively displayed, and it is possible to prevent information leakage or the like, which may occur in case of theft or loss.

As a result, the convenience of the user can be improved.

1 is a block diagram illustrating a display device according to an embodiment disclosed herein.
2A and 2B are conceptual diagrams of a communication system in which a display device according to the present invention is operable.
3 is a conceptual diagram showing an embodiment of a display device according to the present invention.
4 is a flow chart for explaining an embodiment of a display device according to the present invention.
FIGS. 5A, 5B, and 6 are conceptual diagrams showing an embodiment of adjusting transparency according to contents.
FIG. 7 is a conceptual diagram showing an embodiment for adjusting transparency according to the amount of light detected from the outside.
8 is a conceptual diagram showing an embodiment for adjusting transparency according to a locked state and an unlocked state.
9A to 9C are conceptual diagrams showing an embodiment in which transparency is adjusted according to the input of an external command.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings, wherein like reference numerals are used to designate identical or similar elements, and redundant description thereof will be omitted. 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. In the following description of the embodiments of the present invention, a detailed description of related arts will be omitted when it is determined that the gist of the embodiments disclosed herein may be blurred. In addition, it should be noted that the attached drawings are only for easy understanding of the embodiments disclosed in the present specification, and should not be construed as limiting the technical idea disclosed in the present specification by the attached drawings.

1 is a block diagram illustrating a display device 100 according to one embodiment disclosed herein.

The display device 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 that enable wireless communication between the display device 100 and the wireless communication system or between the display device 100 and the network in which the display device 100 is located. For example, the wireless communication unit 110 may include at least one of 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. The broadcast management server may be 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 server and transmitting the received broadcast signals and / or broadcast- related information to the display device 100. 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 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 And a Digital Broadcasting System (ISDB-T) (Integrated Services Digital Broadcast-Terrestrial). 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 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 mobile communication module 112 is configured to implement a video communication mode and a voice communication mode. The video call mode refers to a state of talking while viewing a video of the other party, and the voice call mode refers to a state in which a call is made without viewing the other party's video. In order to implement the video communication mode and the voice communication mode, the mobile communication module 112 is configured to transmit and receive at least one of voice and image.

The wireless Internet module 113 is a module for wireless Internet access, and may be embedded in or externally mounted on the display device 100. Examples of the wireless Internet technology include a wireless LAN (WLAN), a wireless fidelity (WiFi) direct, a DLNA (Digital Living Network Alliance), a Wibro (Wireless broadband), a Wimax (World Interoperability for Microwave Access), HSDPA Can be used.

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, NFC (Near Field Communication), etc. are used as short range communication technology .

The position information module 115 is a module for obtaining the position of the display device 100, and representative examples thereof include a Global Position System (GPS) module or a Wireless Fidelity (WiFi) module.

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 an external device through the wireless communication unit 110. [ Further, the position information of the user and the like can be calculated from the image frame obtained by the camera 121. [ 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 according to a control command for controlling the operation of the display device 100 applied by the user. The user input unit 130 may include a key pad, a dome switch, a touch pad (static / static), a jog wheel, a jog switch, and the like.

The sensing unit 140 may sense the current state of the display device 100 such as the position of the display device 100, the presence of a user, the orientation of the display device 100, acceleration / deceleration of the display device 100, And generates a sensing signal (or a sensing signal) for controlling the operation of the display device 100. The sensing unit 140 may sense whether the power supply unit 190 is powered on, whether the interface unit 170 is connected to an external device, and the like.

The output unit 150 may include a display unit 151, an audio output module 153, an alarm unit 154, a haptic module 155, and the like in order to generate output related to visual, auditory, have.

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

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, a 3D display, and an e-ink 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.

Also, the display unit 151 may be configured as a stereoscopic display unit 152 for displaying a stereoscopic image.

Here, a stereoscopic image represents a 3-dimensional stereoscopic image, and a 3-dimensional stereoscopic image represents a progressive depth and reality in which objects are located on a monitor or a screen, It is an image that makes you feel the same as the space. 3D stereoscopic images are implemented using binocular disparity. The binocular parallax means a parallax caused by the position of two eyes away from each other. When two eyes see two different images and the images are transmitted to the brain through the retina and fused, the depth and real feeling of the stereoscopic image can be felt .

The stereoscopic display unit 152 may be applied to a three-dimensional display system such as a stereoscopic system (glasses system), an autostereoscopic system (no-glasses system), and a projection system (holographic system). The stereoscopic method, which is widely used in home television receivers, includes a Wheatstone stereoscopic method.

Examples of the autostereoscopic method include a parallax barrier method, a lenticular method, an integral imaging method, and a switchable lens method. The projection method includes a reflection type holographic method and a transmission type holographic method.

Generally, 3D stereoscopic images consist of left image (left eye image) and right image (right eye image). A top-down method of arranging a left image and a right image in one frame according to a method in which a left image and a right image are combined into a three-dimensional stereoscopic image, A checker board system in which pieces of a left image and a right image are arranged in a tile form, a left-to-right (right-side) Or an interlaced method in which rows are alternately arranged, and a time sequential (frame-by-frame) method in which right and left images are alternately displayed in time.

In addition, the 3D thumbnail image can generate a left image thumbnail and a right image thumbnail from the left image and right image of the original image frame, respectively, and combine them to generate one 3D thumbnail image. In general, a thumbnail means a reduced image or a reduced still image. The left image thumbnail and the right image thumbnail generated in this way are displayed on the screen with a difference of the left and right distance by the depth corresponding to the parallax between the left image and the right image, thereby exhibiting a stereoscopic spatial feeling.

The left and right images necessary for realizing the three-dimensional stereoscopic image can be displayed on the stereoscopic display unit 152 by a stereoscopic processing unit (not shown). The stereoscopic processing unit receives a 3D image and extracts a left image and a right image from the 3D image, or receives a 2D image and converts it into a left image and a right image.

On the other hand, when a display unit 151 and a sensor (hereinafter, referred to as 'touch sensor') that detects a touch operation form a mutual layer structure (hereinafter referred to as a 'touch screen' It can also be used as an input device in addition to the 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 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 where the touch object is touched on the touch sensor but also the pressure at the time of touch. Here, the touch object may be a finger, a touch pen, a stylus pen, a pointer, or the like as an object to which a touch is applied to the touch sensor.

If there is a touch input to the touch sensor, the corresponding signal (s) is sent to the touch controller. 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.

Referring to FIG. 1, a proximity sensor 141 may be disposed in an inner region of a display device or a proximity of the touch screen. The proximity sensor 141 may be provided as an example of the sensing unit 140. The proximity sensor 141 refers to a sensor that detects the presence of an object approaching a predetermined detection surface or an object existing in the vicinity of the detection surface without mechanical contact using an electromagnetic force or an infrared ray. The proximity sensor 141 has a longer life than the contact type sensor and its utilization is also high.

Examples of the proximity sensor 141 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. When the touch screen is electrostatic, it is configured to detect the proximity of the pointer by a change of the electric field along the proximity of an object having conductivity (hereinafter, referred to as a pointer). 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 141 detects a proximity touch and a proximity touch pattern (for example, 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.

In the case where the three-dimensional display unit 152 and the touch sensor have a mutual layer structure (hereinafter referred to as a 'three-dimensional touch screen') or a three-dimensional sensor that detects the touch operation and the stereoscopic display unit 152 are combined with each other The stereoscopic display unit 152 may also be used as a three-dimensional input device.

The sensing unit 140 may include a proximity sensor 141, a three-dimensional touch sensing unit 142, an ultrasonic sensing unit 143, and a camera sensing unit 144 as an example of the three-dimensional sensor.

The proximity sensor 141 measures the distance between the sensing surface (for example, a user's finger or a stylus pen) to which the touch is applied without mechanical contact using the force of the electromagnetic field or infrared rays. The display device 100 recognizes which portion of the stereoscopic image is touched using the distance. In particular, when the touch screen is of the electrostatic type, the proximity of the sensing object is detected by a change of the electric field according to the proximity of the sensing object, and the touch on the three-dimensional is recognized using the proximity.

The stereoscopic touch sensing unit 142 senses the strength or duration of a touch applied to the touch screen. For example, the three-dimensional touch sensing unit 142 senses a pressure to apply a touch, and when the pressing force is strong, recognizes the touch as a touch to an object located further away from the touch screen toward the inside of the terminal.

The ultrasonic sensing unit 143 is configured to recognize the position information of the sensing target using ultrasonic waves.

The ultrasound sensing unit 143 may include, for example, an optical sensor and a plurality of ultrasound sensors. The light sensor is configured to sense light, and the ultrasonic sensor is configured to sense ultrasonic waves. Since light is much faster than ultrasonic waves, the time it takes for light to reach the optical sensor is much faster than the time it takes for the ultrasonic waves to reach the ultrasonic sensor. Therefore, it is possible to calculate the position of the wave generating source using the time difference with the time when the ultrasonic wave reaches the reference signal.

The camera sensing unit 144 includes at least one of a camera 121, a photo sensor, and a laser sensor.

For example, the camera 121 and the laser sensor are combined with each other to sense a touch of a sensing target with respect to a three-dimensional stereoscopic image. When the distance information detected by the laser sensor is added to the two-dimensional image photographed by the camera, three-dimensional information can be obtained.

As another example, a photosensor may be stacked on a display element. The photosensor is configured to scan the movement of the object proximate to the touch screen. More specifically, the photosensor mounts photo diodes and TRs (Transistors) in a row / column and scans the contents loaded on the photosensor using an electrical signal that varies according to the amount of light applied to the photo diode. That is, the photo sensor performs coordinate calculation of the object to be sensed according to the amount of light change, thereby acquiring position information of the object to be sensed.

The audio output module 153 can 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 153 also outputs sound signals related to functions (e.g., call signal reception sound, message reception sound, etc.) performed on the display device 100. [ The sound output module 153 may include a receiver, a speaker, a buzzer, and the like.

The alarm unit 154 outputs a signal for notifying the occurrence of an event of the display apparatus 100. Examples of events generated in the display device 100 include call signal reception, message reception, key signal input, touch input, and the like. The alarm unit 154 may output a signal for notifying the occurrence of an event by using a form other than the video signal or the audio signal, for example, vibration. The video signal or the audio signal may be output through the display unit 151 or the sound output module 153 so that the display unit 151 and the sound output module 153 may be classified as a part of the alarm unit 154 .

The haptic module 155 generates various tactile effects that the user can feel. A typical example of the haptic effect generated by the haptic module 155 may be vibration. The intensity and the pattern of the vibration generated by the hit module 155 can be controlled by the setting of the user's selection or control unit 180. [ For example, the haptic module 155 may combine and output different vibrations or sequentially output the vibrations.

In addition to the vibration, the haptic module 155 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 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 155 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 sense of the finger or arm. At least two haptic modules 155 may be provided according to the configuration of the display device 100.

The memory 160 may store a program for the operation of the controller 180 and temporarily store input / output data (e.g., a phone book, a message, a still image, a moving picture, etc.). The memory 160 may store data on vibration and sound of various patterns outputted when a 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), a static random access memory (SRAM), a read-only memory (ROM), an electrically erasable programmable read-only memory (EEPROM), a programmable read- And may include a storage medium of at least one type of disk and optical disk. The display device 100 may be operated 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 display device 100. The interface unit 170 receives data from an external device or supplies power to each component in the display device 100 or transmits data to the external device in the display device 100. For example, a port for connecting a device equipped with a wired / wireless headset port, an external charger port, a wired / wireless data port, a memory card port, An audio I / O port, a video 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 display device 100 and includes a user identification module (UIM), a subscriber identity module (SIM) 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 display device 100 through the interface unit 170. [

The interface unit 170 may be a path through which power from the cradle is supplied to the display device 100 when the display device 100 is connected to an external cradle, And various command signals may be transmitted to the display device 100. FIG. The various command signals or the power from the cradle can be operated as a signal for recognizing that the display device 100 is correctly mounted on the cradle.

The controller 180 typically controls the overall operation of the display device 100. 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. [

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

In addition, if the state of the display device 100 satisfies a set condition, the controller 180 can execute a lock state to restrict input of a user's control command to applications. Also, the controller 180 may control the lock screen displayed in the locked state based on the touch input sensed through the display unit 151 in the locked state.

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 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 , Microprocessors, microprocessors, microprocessors, and other electronic units for carrying out other functions. In some cases, the embodiments described herein may be implemented by the controller 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.

The software code may 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. [

Next, a communication system that can be implemented through the display device 100 according to the present invention will be described.

2A and 2B are conceptual diagrams of a communication system in which the display device 100 according to the present invention can operate.

First, referring to FIG. 2A, the communication system may use different wireless interfaces and / or physical layers. For example, wireless interfaces that can be used by a communication system include Frequency Division Multiple Access (FDMA), Time Division Multiple Access (TDMA), Code Division Multiple Access (CDMA) , Universal Mobile Telecommunications Systems (UMTS) (especially Long Term Evolution (LTE)), Global System for Mobile Communications (GSM), and the like.

Hereinafter, for the sake of convenience of description, the description will be limited to CDMA. However, it is apparent that the present invention can be applied to all communication systems including CDMA wireless communication systems.

2A, a CDMA wireless communication system includes at least one display device 100, at least one base station (BS) 270, at least one base station controller (BSCs) 275, and a Mobile Switching Center (MSC) The MSC 280 is configured to be coupled to a Public Switched Telephone Network (PSTN) 290 and BSCs 275. BSCs 275 may be coupled in pairs with BS 270 through a backhaul line. The backhaul line may be provided according to at least one of E1 / T1, ATM, IP, PPP, Frame Relay, HDSL, ADSL or xDSL. Thus, a plurality of BSCs 275 may be included in the system shown in FIG. 2A.

Each of the plurality of BSs 270 may include at least one sector, and each sector may include an omnidirectional antenna or an antenna pointing to a particular direction of radials from the BS 270. In addition, each sector may include two or more antennas of various types. Each BS 270 may be configured to support a plurality of frequency assignments and each of the plurality of frequency assignments may have a specific spectrum (e.g., 1.25 MHz, 5 MHz, etc.).

The intersection of sector and frequency assignment may be referred to as a CDMA channel. The BS 270 may be referred to as a Base Station Transceiver Subsystem (BTSs). In this case, one BSC 275 and at least one BS 270 may be collectively referred to as a " base station ". The base station may also indicate a "cell site ". Alternatively, each of the plurality of sectors for a particular BS 270 may be referred to as a plurality of cell sites.

As shown in FIG. 2A, a broadcasting transmitter (BT) 295 transmits a broadcasting signal to terminals 100 operating in the system. The broadcast receiving module 111 shown in FIG. 1 is provided in the display device 100 to receive a broadcast signal transmitted by the BT 295.

In addition, FIG. 2A illustrates a satellite 300 of a Global Positioning System (GPS). The satellite 300 assists in locating the display device 100. Although two satellites are shown in FIG. 2A, useful location information may be obtained by two or more satellites. The location information module 115 shown in FIG. 1 cooperates with the satellite 300 shown in FIG. 2A to obtain desired location information. Here, the position of the display device 100 can be tracked using all techniques capable of tracking the location as well as the GPS tracking technology. Also, at least one of the GPS satellites 300 may optionally or additionally be responsible for satellite DMB transmission.

Of the typical operation of a wireless communication system, the BS 270 receives a reverse link signal from the display device 100. At this time, the display apparatus 100 is connecting a call, transmitting or receiving a message, or performing another communication operation. Each of the reverse link signals received by the particular base station 270 is processed by the particular base station 270. The data resulting from the processing is transmitted to the connected BSC 275. The BSC 275 provides call resource allocation and mobility management functions, including the organization of soft handoffs between the base stations 270. BSCs 275 also transmit the received data to MSC 280 and MSC 280 provides additional transport services for connection with PSTN 290. [ Similarly, the PSTN 290 is connected to the MSC 280, the MSC 280 is connected to the BSCs 275, and the BSCs 275 are connected to the BS 100 so that the forward link signal is transmitted to the display device 100 270 can be controlled.

Next, a method of acquiring the location information of the display device 100 using a WiFi (Wireless Fidelity) Positioning System (WPS) will be described with reference to FIG. 2B.

The WiFi positioning system 300 includes a WiFi module provided in the display device 100 and a wireless access point 320 transmitting or receiving a wireless signal with the WiFi module, Is a technology for tracking the position of the apparatus 100, and refers to a WLAN (Wireless Local Area Network) based positioning technique using WiFi.

The WiFi location tracking system 300 includes a WiFi location server 310, a display device 100, a wireless AP 330 connected to the display device 100, and a database 330 in which wireless AP information is stored .

The WiFi location server 310 extracts information of the wireless AP 320 connected to the display device 100 based on the location information request message (or signal) of the display device 100. Information of the wireless AP 320 connected to the display device 100 may be transmitted to the Wi-Fi position server 310 through the display device 100 or may be transmitted from the wireless AP 320 to the Wi- Lt; / RTI >

SSID, RSSI, channel information, Privacy, Network Type, Signal Strength, and Noise Strength based on the location information request message of the display device 100, Lt; / RTI >

The WiFi location server 310 receives the information of the wireless AP 320 connected to the display device 100 and transmits the information included in the built-in database 330 to the wireless AP 320, (Or analyzes) the position information of the display device 100 by comparing the information.

In FIG. 2B, the wireless APs connected to the display device 100 are illustrated as first, second, and third wireless APs 320 as an example. However, the number of wireless APs connected to the display device 100 can be variously changed according to the wireless communication environment where the display device 100 is located. The WiFi location tracking system 300 is capable of tracking the location of the display device 100 when the display device 100 is connected to at least one wireless AP.

Next, the database 330 may store various information of arbitrary wireless APs located at different locations, as will be described in more detail with respect to a database 330 in which arbitrary wireless AP information is stored.

The information of any wireless APs stored in the database 300 includes at least one of MAC address, SSID, RSSI, channel information, privacy, network type, radar coordinate of the wireless AP, (Available in GPS coordinates), address of the AP owner, telephone number, and the like.

Since the wireless base station 330 stores the wireless AP information and the location information corresponding to the wireless AP, the WiFi location server 310 can access the display device 100 from the database 330, The location information of the display device 100 can be extracted by searching the wireless AP information corresponding to the information of the wireless AP 320 connected to the wireless AP 320 and extracting the location information matched with the retrieved wireless AP information.

The position information of the display device 100 thus extracted is transmitted to the display device 100 through the Wi-Fi location server 310, so that the display device 100 can acquire the location information.

Hereinafter, the structure of the display device 100 or the display device 100 in which the components of the display device 100 or the display device 100 according to an embodiment of the present invention shown in FIG. 1 are arranged will be described.

3 is a conceptual diagram showing an embodiment of a display device 100 according to the present invention.

Referring to FIG. 3, a display apparatus 100 according to the present invention includes a main body 310, a display unit 151, and a control unit 180.

The display device 100 according to the present invention may be implemented with a head mounted display (HMD). As a concrete example, it can be implemented as smart glasses.

The main body 310 is formed to be mountable on the head. For example, it can be implemented as a frame and leg in smart glasses.

The display unit 151 is disposed at a position corresponding to both eyes in combination with the main body 310, and superimposes and outputs time information on the received external image.

Here, the external image refers to the external environment viewed by the wearer of the display apparatus 100 through the display unit 151. That is, it can be seen that the wearer of ordinary glasses is similar to the external environment viewed through the lens.

The time information refers to a virtual object generated by the display device 100 or received from an external device. For example, an application, a corresponding icon, a content, a UI of a communication mode, and the like. Which may be generated by the control unit 180 or input from a mobile terminal such as a smart phone.

In an embodiment, an icon may be displayed on the display unit 151 together with an external image to indicate the weather.

Also, the display unit 151 may be implemented as a smart glass capable of changing the light transmittance. Accordingly, the display unit 151 can adjust the transparency by changing the transmittance of light under specific circumstances or conditions.

As described above, the control unit 180 can control the display device 100. [ Specifically, a control command for controlling the transparency of the display unit 151 may be generated. As a result, the display unit 151 adjusts the transparency according to the control command generated by the controller 180, thereby adjusting the sharpness of the input external image.

For example, when the wearer views the movie content, the control unit 180 can generate a control command to set the display unit 151 in an opaque state. The display unit 151 adjusts the transparency in an opaque state according to the control command. As a result, the wearer is blocked from external images and only the movie content is visible.

The controller 180 may be mounted on the main body 310 of the display device 100 or may be integrally formed with the main body 310. In another embodiment, it may be spaced apart from the body 310.

The camera 121 may be disposed on the front face of at least one of the left and right eye display units 151. Alternatively, it may be disposed on one side or both sides of the frame 310 so as to take a space other than the sight of the wearer.

The user input unit 130 may be implemented as a separate touch panel on one or both sides of the frame 310. Alternatively, it may be implemented with a physical key. For example, a power ON / OFF switch may be implemented on one side of the frame 310.

In another embodiment, it may be implemented as a separate external device connected to the main body 310. Accordingly, the user can input a specific command to a separate external device. Alternatively, the display unit 151 may be implemented as a touch screen to directly receive a control command from a user.

On the other hand, as one embodiment of the head mount display device, smart glasses have been introduced. The smart glasses implemented as a wearable device can easily perform the functions performed in the existing mobile terminal.

However, when the smart glasses are worn, external images viewed through the smart glasses and output visual information are displayed together, which may make it difficult to recognize the visual information. In addition, the content is displayed on the lens of the transparent smart glasses, so that contents that are private or security-requiring may be exposed to others.

Hereinafter, a display device 100 and a control method thereof that can improve the convenience of the user by adjusting the transparency of the display unit 151 will be described with reference to the accompanying drawings.

FIG. 4 is a flowchart for explaining an embodiment of a display device 100 (see FIG. 1) according to the present invention. The display device 100 includes a main body 310, a display portion 151, and a control portion 180. [

Referring to FIG. 4, in operation S410, the time information is superimposed on the external image input through the display unit 151 and output.

At this time, the display unit 151 is disposed at a position corresponding to both eyes in combination with the main body 310 formed to be mountable on the head.

Subsequently, a control command for controlling the transparency of the display unit 151 is generated (S420).

Thereafter, in step S430, transparency is adjusted according to the generated control command to adjust the sharpness of the input external image.

As described above, the control unit 180 can generate a control command for adjusting the transparency of the display unit 151 under a specific situation or condition, and the display unit 151 sets transparency according to the control command .

As an embodiment, the control unit 180 may generate a control command for adjusting the transparency according to the content output as time information. As a result, the display unit 151 can output only the time information excluding the external image input by adjusting the transparency according to the control command.

FIGS. 5A, 5B, and 6 are conceptual diagrams showing an embodiment of adjusting transparency according to contents.

Referring to FIG. 5A, a screen displayed on the display unit 151 when a user checks a mail in a park while wearing the display device 100 is shown. That is, the external image 510, which is a park, and the mail-in time information 520 can be output together.

Referring to FIG. 5A, the state of FIG. 5A is viewed from the outside, and the mail 520 can be confirmed through the transparent display unit 151 even from the outside.

Referring to FIG. 5B, when the contents of the mail 520 are to be secured, the display unit 151 can be set to a semi-transparent state or an opaque state. As a result, only the mail 520 can be output to the display unit 151. [ Alternatively, the external image 510 may be output with blurry sharpness.

Referring to FIG. 5 (d), FIG. 5 (b) shows the state of FIG. 5 (b) from the outside, and it is difficult to confirm the content of the mail 520 by the translucent or opaque display 151 on the outside.

That is, when a content requiring security or a content requiring privacy protection is output, the display unit 151 may be made semi-transparent or opaque so that it is difficult to check it from the outside.

For example, content that requires security may include corporate mail or confidential information, payment information, and the like. In addition, content that requires privacy protection may include a photo album, a message received from a particular person, a personal profile or information.

Referring to FIG. 6A, when the wearer of the display apparatus 100 views the movie contents while riding the subway, the external image inside the subway and the time information as movie contents can be output together. At this time, since the movie content and the external image are superimposed and outputted, the wearer can be disturbed by the external image when watching the movie.

Referring to FIG. 6B, the display unit 151 may be set in a semi-transparent or opaque state to block external images and output only movie content.

That is, when the preset content is outputted or the display unit 151 is made semi-transparent or opaque according to the type of the content, the external image can be blocked and only the content can be output. In this case, as described with reference to Figs. 5A and 5B, it becomes difficult to confirm this content even outside.

For example, when a content such as a movie or a game is output, the display unit 151 may be made translucent or opaque to block the external image and output only the content to the entire screen.

As an embodiment, in the case of stopping or temporarily stopping the movie content being executed in Fig. 6B, an external image may be outputted together as shown in Fig. 6A again.

As another embodiment, when the motion of the wearer is detected, the external image that has been blocked can be output again. Accordingly, it is possible to prevent a safety accident that may occur due to external image blocking.

Meanwhile, the controller 180 may generate a control command for adjusting the transparency according to the amount of light detected from the outside.

FIG. 7 is a conceptual diagram showing an embodiment for adjusting transparency according to the amount of light detected from the outside.

Referring to FIG. 7, the display apparatus 100 according to the present invention can adjust the transparency of the display unit 151 according to the amount of external light sensed through the optical sensor or the camera 121.

For example, when strong sunlight is detected, the transparency of the display unit 151 can be adjusted in a translucent state to reduce the sharpness of the external image. As a result, it is possible to perform the function of a sunglass protecting the wearer's eyes from strong light. Further, the wearer can clearly recognize the external image and the visual information under an appropriate light amount.

Meanwhile, the control unit 180 may generate a control command for adjusting the transparency according to preset conditions.

As an example, when there is a risk to the wearer in blocking an external image, the transparent state can be maintained as it is. Specifically, a control command for blocking an external image from the user may be input. At this time, if it is determined that the wearer is driving or walking, a message indicating that the external image can not be blocked for safety may be output.

In another embodiment, when the display device 100 is located in the smart glass prohibited space, the operation of the display device 100 can be stopped while the display part 151 is changed to an opaque state.

In another embodiment, when the wearer is a minor, when adult or violent content is output from an external device, the display unit 151 may be made opaque to prevent a minor from watching an external device.

In another embodiment, an application or a content corresponding to a preset condition can be executed on the opaque display unit 151. [ Specifically, when a video chat with a girlfriend is made, the user can automatically switch to the opaque mode to protect privacy. Or, if you check your company's mail, you can automatically switch to opaque mode to keep it secure.

Meanwhile, the controller 180 may generate a control command for adjusting the transparency according to the locked state and the unlocked state.

8 is a conceptual diagram showing an embodiment for adjusting transparency according to a locked state and an unlocked state.

Referring to FIG. 8 (a), when the user authentication to determine whether the user is the designated user fails, the display unit 151 becomes opaque.

For example, when the user authentication fails, an object 810 indicating a lock indication on the opaque display unit 151 can be output. At the same time, a warning sound or vibration can be output. Accordingly, it is easy to know whether or not the user is authenticated from the outside.

In another embodiment, the display unit 151 may be turned into an opaque state after a certain period of time has elapsed since the user took off the display device 100. [

Referring to (b) of FIG. 8, when the user is authenticated as a wearer designated through various authentication methods, the display unit 151 is switched to a transparent state.

On the other hand, the controller 180 may generate a control command for adjusting the transparency according to a preset external command.

9A to 9C are conceptual diagrams showing an embodiment in which transparency is adjusted according to the input of an external command.

Referring to FIG. 9A, an external command previously set through the user input unit 130 disposed on one or both sides of the frame 310 may be input.

As an embodiment, the user can adjust the transparency of the display unit 151 by applying a touch or a drag input to a separate touch panel disposed in the frame 310.

In another embodiment, the user may manipulate the physical key disposed in the frame 310 to adjust the transparency of the display unit 151. [

Referring to FIG. 9B, it is possible to receive an external command set in advance through contact or connection with an external device.

As an embodiment, when the smartphone and the display apparatus 100 are brought into contact with or connected to each other, the display unit 151 can be turned opaque. Thereafter, the content output from the smartphone can be output to the opaque display unit 151. [

Referring to FIG. 9C, an external command can be received by the wearer's gesture applied toward the display unit 151. [

As an embodiment, transparency increases when the wearer sweeps up the front of the display unit 151, and transparency decreases when sweeping down the wearer. Likewise, the wearer may adjust the transparency by applying a sliding operation to the entire surface of the display unit 151.

At this time, gesture commands may be given to the left and right eye display units 151 to set the transparency of the left eye and right eye display units 151 to be different from each other.

In another embodiment, when a wearer who is playing a movie or game content on an opaque display unit 151 lifts his head, the user can switch to a transparent state. Alternatively, when the wearer looks at the left and right, the movement of the wearer's pupil can be grasped and the side of the left eye and the right eye display unit 151 in which the motion is detected can be changed to a transparent state.

According to the present invention, the transparency of the display unit can be adjusted. Accordingly, it is possible to output time information to a full display instead of an Augmented Reality (AR) display, and it is possible to prevent private information or security-required contents from being exposed to others.

In addition, the function of the sunglasses can be performed by adjusting the transparency level according to the amount of external light. This eliminates the need for a separate detachable sunglass to be mounted on the existing smart glasses and provides a more suitable transparency considering the amount of ambient light compared to detachable sunglasses that uniformly control the amount of light.

And, the lock state and the unlock state can be intuitively displayed, and it is possible to prevent information leakage or the like, which may occur in case of theft or loss.

As a result, the convenience of the user can be improved.

Further, according to the embodiment disclosed herein, the above-described method can be implemented as a code that can be read by a processor on a medium on which the program is recorded. Examples of the medium that can be read by the processor include ROM, RAM, CD-ROM, magnetic tape, floppy disk, optical data storage, etc., and may be implemented in the form of a carrier wave (e.g., transmission over the Internet) .

The mobile terminal described above can be applied to not only the configuration and method of the embodiments described above but also all or some of the embodiments may be selectively combined so that various modifications may be made to the embodiments It is possible.

Claims (14)

A body formed to be mountable on the head;
A display unit disposed at a position corresponding to both eyes in association with the main body, for superimposing time information on an input external image; And
And a control unit for generating a control command for controlling transparency of the display unit,
The display unit includes:
Wherein the controller controls the transparency according to the control command to adjust the sharpness of the input external image. The method according to claim 1,
Wherein,
And generates a control command for controlling the transparency according to a content output as the time information. 3. The method according to claim 1 or 2,
The display unit includes:
Wherein the controller controls the transparency according to the control command to output only the time information excluding the input external image. The method according to claim 1,
Wherein,
And generates a control command for controlling the transparency according to an amount of light detected from the outside. The method according to claim 1,
Wherein,
And generates a control command for controlling the transparency according to a preset condition. The method according to claim 1,
Wherein,
And generates a control command for controlling the transparency according to a locked state and an unlocked state. The method according to claim 1,
Wherein,
And generates a control command for controlling the transparency according to an input of a predetermined external command. (a) superimposing and outputting time information on an external image input through a display unit;
(b) generating a control command for controlling transparency of the display unit; And
(c) adjusting the clarity of the input external image by adjusting the transparency according to the control command,
The display unit includes:
Wherein the display device is disposed at a position corresponding to both eyes in combination with a body formed to be mountable on the head. 9. The method of claim 8,
The step (b)
And generating a control command for controlling the transparency according to a content output as the time information. 10. The method according to claim 8 or 9,
The step (c)
And outputting only the time information excluding the input external image by adjusting the transparency according to the control command. 9. The method of claim 8,
The step (b)
And generating a control command for adjusting the transparency according to an amount of light detected from the outside. 9. The method of claim 8,
The step (b)
And generating a control command for adjusting the transparency according to a preset condition. 9. The method of claim 8,
The step (b)
And generating a control command for controlling the transparency according to a locked state and an unlocked state. 9. The method of claim 8,
The step (b)
And generating a control command for controlling the transparency according to an input of a predetermined external command.

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