KR101529926B1 - Portable terminal - Google Patents

Abstract

According to an aspect of the present invention, there is provided an image processing apparatus including a projection unit configured to project first image information, an image input unit configured to receive second image information, a display unit configured to enlarge the first image information in a projection direction, And a second lens unit disposed adjacent to the lens unit and corresponding to the first and second image information, respectively, the lens unit being arranged to advance the first and second image information in the thickness direction of the terminal, And a light refracting portion formed to refract the traveling direction of the second lights.

Description

[0001] PORTABLE TERMINAL [0002]

The present invention relates to a portable terminal including a projection unit for projecting image information to the outside.

A portable terminal is a portable electronic apparatus which is portable and has one or more functions of voice and video call function, information input / output function, and data storing function.

As the functions of the portable terminal are diversified, the portable terminal is implemented in the form of a multimedia device having complicated functions such as photographing and photographing of a moving picture, reproduction of music or video file, reception of a game, and reception of a broadcast.

Various new attempts have been made in terms of hardware or software to implement the complex functions of such multimedia devices. For example, a user interface environment is provided for a user to easily and conveniently search for or select a function. In addition, various designs have been attempted while being regarded as portable personal items for expressing the personality of the portable terminal.

In addition to the above-mentioned attempts, a method of further enlarging the size of the image implemented by the portable terminal can be considered.

It is an object of the present invention to provide a mobile terminal capable of realizing an enlarged image than an image accessible through a display unit.

It is another object of the present invention to provide a mobile terminal that is slimly formed while implementing an enlarged image.

According to an aspect of the present invention, there is provided a portable terminal including a projection unit, an image input unit, a lens unit, and a light refraction unit. The projection unit is formed to project the first image information. The image input unit is configured to receive the second image information. The lens unit is formed to enlarge the first image information in the projection direction and reduce the second image information in the input direction. The lens unit is arranged to advance the first and second image information in the thickness direction of the terminal. The light refracting portion is disposed adjacent to the lens portion and is formed to refract the traveling direction of the first and second lights corresponding to the first and second image information, respectively.

According to an aspect of the present invention, the projection unit includes a light source element and an image forming element. The light source element is formed to generate the first light. The image forming device is controlled to form image information using the first light. The light refracting portion can be disposed between the image forming element and the lens portion on the traveling path of the first light.

According to another aspect of the present invention, the image input unit includes a camera sensor that converts the second light into an electrical signal corresponding to the second image information. The light refracting portion is disposed between the camera sensor and the lens portion on the traveling path of the second light.

According to another aspect of the present invention, the projection unit includes a plurality of light source elements each corresponding to a different color. The plurality of light source elements are controlled so as to sequentially generate the first light.

According to another aspect of the present invention, the photoreflecting portion includes a plurality of prisms for refracting the first and second light, respectively. The photoreflecting portion may be formed to totally reflect light incident on at least one surface. The portable terminal may further include a polarization forming unit for polarizing the first light traveling to the light refracting unit. The photorefractive portion may be formed to reflect polarized light incident on at least one surface.

According to another aspect of the present invention, the portable terminal may further include a reflector. The reflector is disposed between the light refracting portion and the lens portion, and is formed to reflect the first and second light.

The portable terminal according to the present invention configured as described above can implement image information projected on a larger screen through the projection unit. Further, since the projection unit and the image input unit share the lens unit, a slimmer portable terminal is formed.

In addition, the present invention is configured to advance image information in the thickness direction of the terminal, and the projection surface and the incident surface of the lens portion can be arranged in parallel with the display portion.

Further, according to the present invention, the thickness of the terminal can be more slimly formed by using the reflector.

Hereinafter, a portable terminal according to the present invention will be described in detail with reference to the drawings. In the present specification, the same or similar reference numerals are given to different embodiments in the same or similar configurations. As used herein, the singular forms "a", "an" and "the" include plural referents unless the context clearly dictates otherwise.

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

The portable terminal of the present invention includes a first body 110 and a second body 120 that is slidable along at least one direction on the first body 110. However, the present invention is not limited to the disclosed embodiments and can be applied to various types of portable terminals such as a bar type, a folder type, a swing type, and a swivel type.

The first body 110 may be referred to as a closed configuration in which the first body 110 and the second body 120 are overlapped with each other and the first body 110 may be referred to as a second body 120 ) May be referred to as an open configuration.

The portable terminal operates mainly in the standby mode in the closed state, but the standby mode is also released by the operation of the user. In addition, the portable terminal operates mainly in a communication mode in an open state, but may be switched to a standby mode by a user's operation or a predetermined period of time.

The case (casing, housing, cover, etc.) constituting the outer appearance of the first body 110 is formed by the front case 111 and the rear case 112. Various electronic components are installed in the space formed by the front case 111 and the rear case 112. At least one intermediate case may be additionally disposed between the front case 111 and the rear case 112. The cases may be formed by injection molding of a synthetic resin or may be formed of a metal material such as stainless steel (STS) or titanium (Ti).

The display unit 113, the sound output unit 114, the first image input unit 115, the projection unit 140, or the first operation unit 116 are disposed in the first body 110, specifically, the front case 111 .

The display unit 113 includes an LCD (Liquid Crystal Display) module, an OLED (Organic Light Emitting Diode) module, and a TOLED (Transparent OLED) module for visually expressing information.

The display unit 113 may further include a touch screen to enable information input by a user's touch. In addition, the display unit 113 may be configured to generate various tactile effects that a user can feel at the time of touch. This can be realized by a haptic module interlocked with the display unit 113. [ A typical example of a haptic effect generated by a haptic module is vibration. The haptic module may be variously arranged according to the configuration of the portable terminal as well as the display unit 113. [

The sound output unit 114 may be implemented in the form of a receiver or a speaker.

The first image input unit 115 may be implemented as a camera module for capturing an image or a moving image of a user. The first body 110 is provided with a projection unit 140 for projecting image information to the outside. At this time, the first image input unit 115 and the projection unit 140 are formed to share the lens unit 134 (see FIG. 3).

The first operation unit 116 receives a command for controlling the operation of the portable terminal according to an exemplary embodiment of the present invention.

The front case 121 and the rear case 122 may form the case of the second body 120, as in the case of the first body 110. [

The second operation unit 123 may be disposed on the front surface of the second body 120, specifically, the front case 121.

The third operation unit 124, the first sound input unit 125, and the interface 126 may be disposed in at least one of the front case 121 and the rear case 122. [

The first to third operating portions 116, 123, and 124 may be collectively referred to as a manipulating portion and may be employed in any manner as long as the user operates in a tactile manner.

For example, the operation unit may be implemented as a dome switch or a touch screen or a touch pad capable of receiving commands or information by a push or touch operation of a user, or may be a wheel, a jog type, a joystick, Or the like.

In terms of functions, the first operation unit 116 is for inputting commands such as start, end, and scrolling, and the second operation unit 123 is for inputting numbers, characters, symbols, and the like. Also, the third operation unit 124 may operate as a hot-key for performing a special function such as activation of the first image input unit 115 or the like.

The first to third operation units 116, 123, and 124 may be configured to receive operations related to the operation of the projection unit 140. The operation related to the operation of the projection unit 140 may be, for example, operation start, operation termination of the projection unit 140, focousing of the image information, zooming, and the like.

The first sound input unit 125 may be implemented in the form of a microphone, for example, to receive a user's voice, other sounds, and the like.

The interface 126 allows the portable terminal related to the present invention to exchange data with an external device. For example, the interface 126 may be a wired or wireless connection terminal for connecting to an earphone, a port for short range communication (for example, an IrDA port, a Bluetooth port, a wireless LAN port a wireless Lan port), or power supply terminals for supplying power to the portable terminal.

The interface 126 may be a card socket that accepts an external card such as a subscriber identification module (SIM) or a user identity module (UIM), a memory card for information storage, and the like.

And a power supply unit 127 for supplying power to the portable terminal is mounted on the rear case 122 side. The power supply 127 may be detachably coupled to a rechargeable battery for charging, for example.

2 is a rear perspective view of the portable terminal of FIG.

Referring to FIG. 2, a second image input unit 128 may be additionally mounted on the rear surface of the rear case 122 of the second body 120. The second image input unit 128 may have a photographing direction substantially opposite to that of the first image input unit 115 (see FIG. 1), and may be a camera having different pixels from the first image input unit.

For example, the first image input unit 115 has low pixels 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 second image input unit 128 photographs a general object, It is preferable to have a high pixel because it is often not transmitted.

A flash 129 and a mirror 130 are further disposed adjacent to the second image input unit 128. The flash 129 illuminates the subject when the subject is photographed by the second image input unit 128. The mirror unit 130 allows the user to illuminate the user's own face or the like when the user intends to take a picture of himself / herself (self-photographing) using the second image input unit 128.

The position of the projection unit 140 (see FIG. 1) in the present invention is not limited to the position adjacent to the first image input unit 115. For example, the projection unit 140 may be formed adjacent to the second image input unit 128. At this time, the second image input unit 128 and the projection unit 140 are formed to share the lens unit 134 (see FIG. 3).

And the second sound output unit 131 may be further disposed in the rear case 122. [

The second sound output unit 131 may implement a stereo function together with the first sound output unit 114 (see FIG. 1), and may be used for talking in a speakerphone mode.

On one side of the rear case 122, a broadcast signal receiving antenna 132 may be arranged in addition to an antenna for communication. The antenna 132 may be installed to be able to be drawn out from the second body 120.

A part of the slide module 133 which slidably couples the first body 110 and the second body 120 is disposed on the rear case 112 side of the first body 110.

The other part of the slide module 133 may be disposed on the front case 121 side of the second body 120 and may not be exposed to the outside as in this figure.

In the above description, the second image input unit 128 and the like are disposed in the second body 120, but the present invention is not limited thereto. For example, at least one of the configurations 128 to 132 described as being arranged in the rear case 122, such as the second image input unit 128, is connected to the first body 110, mainly the rear case 112 It is also possible to mount it. In such a case, there is an advantage that the configuration (s) arranged in the rear case 112 in the closed state is protected by the second body 120. Further, the first image input unit 115 may be rotatably formed so that the second image input unit 128 can be photographed up to the second image input unit 128, even if the second image input unit 128 is not separately provided.

3 is an exploded view of the first body 110 of FIG.

Referring to this figure, a window hole 113a is formed in the front case 111. [ A window 113b is coupled to one side of the front case 111 so as to correspond to the window hole 113a.

The window 113b is made of a material through which light can be transmitted, for example, a light transmitting synthetic resin, a tempered glass, or the like. However, the window 113b may include a portion that can not transmit light. Such a portion is a material that can not transmit light or is a surface-treated region such that light can not be transmitted.

The rear case 112 is equipped with a display module 113c. The window 113b and the display module 113c may be classified into the display portion 113 (see Fig. 1). The window 113b may have an area corresponding to the display module 113c and is arranged to cover the display module 113c. Accordingly, the time information output from the display module 113c can be recognized from the outside.

The sound hole 114a corresponding to the sound output unit 114 may be formed on one side of the front case 111. [ An operation hole 116a corresponding to the first operation portion 116 may be formed on the other side of the front case 111. An operation hole 116a corresponding to the operation hole 116a, 'May be mounted.

A circuit board 118, a speaker module 114b, a switch 116b, and the like may be mounted on the rear case 121.

The circuit board 118 may be configured as an example of a controller 170 (see FIG. 7) for operating various functions of the portable terminal. As shown in the figure, a speaker module 114b may be mounted on the circuit board 118 to correspond to the acoustic hole 114a, and a switch 116b may be mounted on the circuit board 118 in correspondence with the operation pad 116 '.

The switch 116b is formed to be able to receive information according to the pressing operation of the operation pad 116 '. The switch 116b and the operation pad 116 'may be classified into the first operation portion 116 (see Fig. 1). A microphone for inputting sound may be mounted on the lower side of the switch 116b.

An image window 134a may be formed on one side of the front case 111. The image window 134a may be formed of a through hole or a material capable of transmitting light.

And the lens section 134 is arranged to correspond to the image window 134a. The lens portion 134 may be mounted on the circuit board 118 as shown. However, the present invention is not limited thereto. For example, the lens unit 134 may be mounted on the rear case 112 or the like.

The first image input unit 115 and the projection unit 150 are disposed adjacent to the lens unit 134.

The projection unit 140 is formed to enlarge and project image information to the outside of the terminal. In this way, image information projected onto a larger screen is realized. The projection unit 140 is configured to project image information through the lens unit 134 and the first image input unit 115 is configured to receive image information through the lens unit 134.

4A and 4B are conceptual diagrams illustrating embodiments of the portable terminal of FIG.

Referring to FIG. 4A, the projection unit 140 projects the first image information 141 through the lens unit 134 (see FIG. 3).

The projected first image information 141 is enlarged on an external screen 141a. The screen 141a refers to an object that blocks or reflects the progress of light to be projected, such as a screen for a beam projector, a wall surface, or a bulletin board. However, the display of the projected first image information 141 is not limited to the method using the screen, and other methods may be used as long as the first image information 141 can be recognized by the user.

As shown in the figure, the portable terminal may be configured to display the first image information 141 on the display unit 113 and to project the first image information 141 on the projection unit 140. This can be implemented by controlling the control unit 170 (see FIG. 7).

Referring to FIG. 4B, the first image input unit 115 is configured to receive the second image information 115b into the controller 170. FIG. The first image input unit 115 receives the second image information 115b through the lens unit 134.

As shown in the figure, the portable terminal may receive the second image information 115b through the first image input unit and display the second image information 115b on the display unit 113. [

FIG. 5A is a conceptual diagram showing an embodiment of an optical system applied to the portable terminal of FIG.

The lens unit 134 is formed so that a plurality of lenses constitute a lens group. The lens unit 134 is formed by combining lenses to enlarge the image information in one direction and reduce the image information in the opposite direction. The lens unit 134 is formed to enlarge the first image information 141 (see FIG. 4A) in the projection direction and reduce the second image information 115b (see FIG. 4B) in the input direction.

The lens unit 134 is formed by arranging the lens groups of the north water in the thickness direction of the terminal. The projection or incidence plane of the lens section 134 is arranged parallel to the plane on which the window 113b (see FIG. 3) is disposed.

Referring to these drawings, the lens unit 134 is disposed to advance the first and second image information 141 and 115b in the thickness direction of the terminal. As shown, this can be realized by arranging the lens groups in the thickness direction of the terminal.

The light refracting portion 150 is disposed adjacent to the lens portion 134. [

The light refraction unit 150 is formed to refract the traveling direction of the first and second lights 141c and 115c corresponding to the first and second image information 141 and 115b. The projection unit 140 outputs the first light 141c to the lens unit 134 and the first image input unit 115 receives the second light 115c from the lens unit 134. [ At this time, the thickness of the terminal is affected by the lens unit 134 and the light refraction unit 150, and the projection unit 140 and the first image input unit 115 are arranged in parallel with the window 113b, A portable terminal having a slim thickness can be realized.

The projection unit 140 includes a light source element 142 and an image forming element 143.

The light source element 142 is formed to generate the first light 141c. The light source device 142 may be formed of a plurality of light source devices 142a, 142b, and 142c that correspond to different colors. The plurality of light source elements 142a, 142b, and 142c may be configured to correspond to red, blue, and green colors, respectively. The plurality of light source elements 142a, 142b, and 142c may be, for example, a light-emitting diode (LED), a laser generator, or the like.

The plurality of light source elements 142a, 142b, and 142c are sequentially controlled to generate the first light 141c. This can be implemented by sequentially turning on and off a plurality of light source devices 142a, 142b, and 142c corresponding to red, blue, and green, respectively.

In the above description and the following description, the projection unit 140 is provided with a plurality of light source elements having different colors, but is not limited thereto. For example, the projection unit 140 may be formed by a method of color-separating white light.

The image forming element 143 is controlled to form image information using the first light 141c.

The image forming element 143 is formed of a plurality of units, and each unit is formed so as to independently reflect the first light 141c corresponding to image information to be implemented. The image forming element 143 may be, for example, a DMD (Digital Micromirror Device), Lcos (Liquid Crystal On Silicon), or a liquid crystal display (LCD). Referring to this figure, the image forming device 143 may be a DMD.

The first light 141c generated by the light source element 142 passes through the illumination optical system 144 formed to collect light and enters the light refraction unit 150.

The light refracting portion 150 is disposed between the image forming element 143 and the lens portion 134 on the path of the first light 141c.

The image input unit 115 includes a camera sensor 115d that converts the second light 115c into an electrical signal corresponding to the second image information 115b. The camera sensor 115d may be configured to image the image of the second image information 115b.

The light refracting portion 150 is disposed between the camera sensor 115d and the lens portion 134 on the path of the second light 115c.

The light refraction unit 150 may include a plurality of prisms 151 and 152 for refracting the first and second lights 141c and 115c, respectively.

Referring to FIG. 5A, the light refracting portion 150 is formed to totally reflect light incident on at least one surface. The light refracting portion 150 may be, for example, a total reflection prism.

The first light 141c is reflected from the reflective surface of the first prism 151 to the image forming element 143. [ The first light 141c reflected by the image forming device 143 is projected to the outside through the lens unit 134 while forming the first image information 141. [

The first light 115c is incident on the second prism 152 through the lens unit 134 and then reflected from the reflective surface toward the camera sensor 115d.

5B is a conceptual diagram illustrating another embodiment of the optical system applied to the portable terminal of FIG.

Referring to this drawing, the image forming device 243 becomes an Lcos panel.

The polarization forming unit 253 may be disposed between the image forming device 243 and the light refracting unit 250. The polarization forming portion 253 is formed to polarize the first light 241c proceeding to the light refracting portion 250. [ For example, the first light 241c is polarized into P wave or S wave.

The light refraction portion 250 is formed so as to reflect polarized light incident on at least one surface. The light refraction portion 250 may be, for example, a polarization prism.

The polarized first light 241c is reflected from the light refracting portion 250 to the image forming element 243. The first light 241c in the image forming element 243 forms the first image information 141 (see FIG. 4A) while the polarization state is changed. The first light 241c whose polarization state has changed is projected to the outside through the lens portion 234.

6 is a conceptual diagram showing another embodiment of an optical system applied to the portable terminal of FIG.

Referring to this figure, a reflector 353 is disposed between the light refracting portion 350 and the lens portion 334. The reflector 353 is formed to reflect the first and second lights 341c and 315c. The reflector 353 may be, for example, a mirror or a prism.

The reflector 353 allows the first and second lights 341c and 315c to be directed from the light refracting portion 350 to the lens portion 334 or from the lens portion 334 to the light refracting portion 350 do. The lens portion 334 may be disposed in the Z-axis direction, and the Z-axis direction may be the thickness direction of the terminal. Through this, the thickness of the terminal can be made slimmer.

7 is a block diagram of a portable terminal according to the present invention.

7, a portable terminal according to an embodiment of the present invention includes a wireless communication module 161, operation units 116, 123 and 124, image input units 115 and 128, a projection unit 140, an acoustic input unit 125, 113, sound output units 114 and 131, a sensing unit 166, an interface 126, a broadcast receiving module 165, a memory 164, a power supply unit 127 and a control unit 170.

The control unit 170 typically controls the overall operation of the portable terminal. For example, voice communication, data communication, video communication, and the like.

In addition to the normal function control, the control unit 170 further controls the operation of the portable terminal related to the present invention.

The wireless communication module 161 transmits / receives a wireless signal to / from a mobile communication base station through an antenna. A transmission unit 162 for transmitting and receiving voice data, character data, video data, and control data under the control of the control unit 170 and for modulating and transmitting a signal to be transmitted for this purpose; 163).

The operation units 116, 123, and 124 are configured as shown in FIG. 1, and provide the control unit 170 with key input data that the user inputs for controlling the operation of the terminal. The operation units 116, 123, and 124 include a dome switch, a touch pad (static / static), a jog wheel, a jog switch, and the like.

The image input units 115 and 128 process 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 is converted into image data that can be displayed on the display unit 113 and output to the display unit 113.

The image frames processed by the image input units 115 and 128 are stored in the memory 164 under the control of the control unit 170 or transmitted to the outside through the wireless transmission /

The projection unit 140 projects image information processed in the portable terminal to the outside. For example, the information displayed on the display unit 113 is projected to the outside under the control of the control unit 170. [

The sound input unit 125 receives an external sound signal by a microphone in a communication mode, a recording mode, a voice recognition mode, or the like, and processes it as electrical voice data. The processed voice data is converted into a form that can be transmitted to the mobile communication base station through the wireless communication module 161 in the communication mode, and is output to the wireless communication module. In the record mode, processed voice data is output to be stored in the memory 164.

The sound input unit 125 may be implemented with various noise reduction algorithms for eliminating noise generated in the process of receiving an external sound signal.

The display unit 113 displays and outputs information processed in the portable terminal. For example, when the portable terminal is in the call mode, the control unit 170 displays a UI (User Interface) or GUI (Graphic User Interface) related to the call. When the portable terminal is in the video communication mode or the photographing mode, the control unit 170 displays and displays the photographed image, the UI, and the GUI. When the display unit 113 includes a touch screen, the display unit 113 is used as an input device in addition to the output device.

The sound output units 114 and 131 receive sound data received from the wireless communication module 161 under the control of the control unit 170 in the call signal reception mode, the communication mode or the recording mode, the voice recognition mode, Converts the stored sound data and outputs it to the outside.

In addition, the sound output units 114 and 131 output sound signals related to functions (e.g., call signal reception sound, message reception sound, etc.) performed in the portable terminal. The sound output units 114 and 131 include a speaker, a receiver, a buzzer, and the like.

The sensing unit 166 senses the current state of the portable terminal, such as the opening / closing state of the portable terminal, the position of the portable terminal, whether or not the user touches the portable terminal, and generates a sensing signal for controlling the operation of the portable terminal. For example, if the portable terminal is in the form of a slide phone, it senses whether the slide phone is opened or closed, and outputs the sensing result to the controller 170 to control the operation of the terminal. And a sensing function related to whether or not the power supply 127 is powered on, whether the interface 126 is coupled to an external device, and the like.

The interface 126 may be any type of interface card such as a wired / wireless headset, an external charger, a wired / wireless data port, a card socket (e.g. a memory card, a SIM / UIM card) It serves as an interface with the device. The interface 126 receives data from an external device or receives power from the external device, transfers the data to each component in the portable terminal, or transmits data in the portable terminal to an external device.

The memory 164 may store a program for processing and controlling the control unit 170 and may have a function for temporarily storing input / output data (e.g., a phone book, a message, a still image, .

In the memory 164, a program for controlling the operation of the portable terminal related to the present invention is stored

Such memory 164 includes the concept of a generally known hard disk, a card type memory (e.g., SD or XD memory), flash memory, RAM, ROM, and the like.

The broadcast receiving module 165 receives broadcast signals transmitted through satellite or terrestrial waves and converts the received broadcast signals into broadcast data formats that can be output to the sound output units 114 and 131 and the display unit 113 and outputs them to the controller 170. Further, the broadcast receiving module 165 receives additional data (e.g., EPG (Electric Program Guide), channel list, etc.) related to broadcasting. The broadcast data and the additional data converted by the broadcast receiving module 165 may be stored in the memory 164.

The power supply unit 127 receives external power and internal power under the control of the controller 170 and supplies power required for operation of the respective components.

The above-described portable terminal is not limited to the configuration and method of the embodiments described above, but all or some of the embodiments may be selectively combined so that various modifications may be made to the embodiments.

1 is a perspective view of a mobile terminal according to an embodiment of the present invention;

2 is a rear perspective view of the portable terminal of FIG. 1;

Figure 3 is an exploded view of the first body of Figure 1;

4A and 4B are conceptual diagrams illustrating embodiments of the portable terminal of FIG.

5A and 5B are conceptual diagrams showing embodiments of an optical system applied to the portable terminal of FIG.

6 is a conceptual diagram showing another embodiment of an optical system applied to the portable terminal of FIG.

7 is a block diagram of a mobile terminal according to the present invention.

Claims (9)

A projection unit configured to project first image information; An image input unit configured to receive second image information; A lens unit formed to enlarge the first image information in a projection direction and reduce the second image information in an input direction and to advance the first and second image information in a thickness direction of the terminal; And And a light refraction unit disposed adjacent to the lens unit and configured to refract the traveling direction of the first and second lights corresponding to the first and second image information, respectively, The projection unit includes: A light source element formed to generate the first light; And And an image forming element controlled to form image information using the first light, The light refracting portion includes: And first and second prisms for respectively refracting the first and second lights, Wherein the first light is reflected from the reflection surface of the first prism to the image forming element to form the first image information and then projected to the outside through the lens part, Wherein the second light is incident on the reflection surface of the second prism through the lens unit, and then reflected toward the image input unit. delete The method according to claim 1, Wherein the light refracting portion is disposed between the image forming device and the lens portion on the path of the first light. The method according to claim 1 or 3, Wherein the image input unit includes a camera sensor for converting the second light into an electrical signal corresponding to the second image information, Wherein the light refracting portion is disposed between the camera sensor and the lens portion on a traveling path of the second light. The method according to claim 1, Wherein the projection unit includes a plurality of light source elements corresponding to different colors, Wherein the plurality of light source elements are controlled to sequentially generate the first light. delete The method according to claim 1, Wherein the light refracting portion is formed to totally reflect light incident on at least one surface. The method according to claim 1, Further comprising a polarization forming unit for polarizing the first light traveling to the light refracting unit, Wherein the light refracting portion is formed to reflect polarized light incident on at least one surface. The method according to claim 1, And a reflector disposed between the light refracting portion and the lens portion and configured to reflect the first and second lights.

Images