KR20100050030A - Mobile terminal and method for adjusting white balance thereof - Google Patents

Abstract

PURPOSE: A mobile terminal and a method thereof for adjusting white balance of a photograph of the color of the subject are provided to set up a reference value of white balance on a view finder display. CONSTITUTION: A display unit(151) indicates a viewfinder screen in which the image through a camera. A controller(180) establishes the color information toward the special spot of the view finder on-screen as the white balance standard value. The controller adjusts the white balance of camera based on the fixed standard value. The controller senses the touch in the special spot of the view finder on-screen.

Description

MOBILE TERMINAL AND METHOD FOR ADJUSTING WHITE BALANCE THEREOF}

The present invention relates to a mobile terminal for adjusting a white balance reference value on a viewfinder screen and a method of adjusting the white balance thereof.

Terminals such as personal computers, laptops, mobile phones, etc. may be configured to perform various functions. Examples of such various functions include data and voice communication functions, taking pictures or videos through a camera, storing voices, playing music files through a speaker system, and displaying images or videos. Some terminals include additional functionality to play games, while others are implemented as multimedia devices. Moreover, recent terminals can receive a broadcast or multicast signal to watch a video or television program.

In general, a terminal may be divided into a mobile terminal and a stationary terminal according to whether or not it is mobile, and again, the mobile terminal may be a portable terminal (or handheld terminal) according to whether the user can directly carry it. And it may be divided into a vehicle mount terminal (vehicle mount terminal).

Efforts to support and increase the function of the terminal continue. The above efforts include not only changes and improvements in structural components forming the terminal, but also improvements in software and hardware.

In general, a mobile terminal equipped with a camera adjusts a white balance through a manual. That is, when the user selects one of the predetermined white balance modes through a menu operation, the mobile terminal performs the white balance in the selected mode.

In addition, in the case of a general digital camera, one shot is taken so that a white object such as paper appears on the full screen, and the photographed image is stored as a preset through a menu operation. In addition, the digital camera performs white balance of pictures taken after the pictures stored as presets.

The present invention provides a mobile terminal for setting a white balance reference value on a viewfinder screen and a method of adjusting the white balance thereof.

Another object of the present invention is to provide a mobile terminal and a method for adjusting the white balance thereof, which control the camera to perform white balance based on a white balance reference value set on the viewfinder screen.

 Mobile terminal according to an embodiment of the present invention for realizing the above object is a camera for acquiring an image, a display unit for displaying a viewfinder screen containing an image to be captured by the camera, and a specific point on the viewfinder screen And a controller for setting the color information of the camera to a white balance reference value and adjusting the white balance of the camera based on the set reference value.

The mobile terminal according to another embodiment of the present invention comprises the steps of switching to the white balance setting mode in response to a white balance setting request during shooting, acquiring color information of a specific point on the viewfinder screen after switching the setting mode; And setting the obtained color information as a white balance reference value, and adjusting the white balance based on the set reference value.

The mobile terminal according to at least one embodiment of the present invention configured as described above may set color information of a point where a touch is detected on the viewfinder screen as a white balance reference value.

In addition, the present invention may control the camera to perform the white balance based on the white balance reference value set on the viewfinder screen. Therefore, the present invention adjusts the white balance to suit the lighting of the place to be photographed, so that the color of the subject's natural color can be photographed as it is.

Hereinafter, a mobile terminal related to the present invention will be described in more detail with reference to the accompanying drawings. The suffixes "module" and "unit" for components used in the following description are merely given in consideration of ease of preparation of the present specification, and do not impart any particular meaning or role by themselves. Therefore, it should be noted that the "module" and "unit" may be used interchangeably with each other.

The terminal may be implemented in various forms. For example, a terminal described herein includes a mobile terminal such as a mobile phone, a smart phone, a notebook computer, a digital broadcasting terminal, a personal digital assistant (PDA), a portable multimedia player (PMP), a navigation device, and the like. And fixed terminals such as digital TVs, desktop computers, and the like. In the following description, it is assumed that the terminal is a mobile terminal. However, it will be readily apparent to those skilled in the art that the configuration according to the following description may also be applied to the fixed terminal except for components specially configured for mobile use.

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

The mobile terminal 100 includes a wireless communication unit 110, an A / V input unit 120, a user input unit 130, a sensing unit 140, an output unit 150, a memory 160, and an interface. The unit 170, the controller 180, and the power supply unit 190 may be included. 1 shows a mobile terminal having various components. However, not all illustrated components are required. The mobile terminal may be implemented by more components than the illustrated components, and the mobile terminal may be implemented by fewer components.

Hereinafter, the components will be described in turn.

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

The broadcast receiving module 111 receives a broadcast signal 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 mean a server that generates and transmits a broadcast signal and / or broadcast related information or a server that receives a pre-generated broadcast signal and / or broadcast related information and transmits the same to a terminal. The broadcast related information may mean information related to a broadcast channel, a broadcast program, or a broadcast service provider. The broadcast signal may include not only a TV broadcast signal, a radio broadcast signal, and a data broadcast signal, but also a broadcast signal having a data broadcast signal combined with a TV broadcast signal or a radio broadcast signal.

Meanwhile, the broadcast related information may be provided through a mobile communication network, and in this case, may be received by the mobile communication module 112.

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

The broadcast receiving module 111 receives broadcast signals using various broadcasting systems, and in particular, digital multimedia broadcasting-terrestrial (DMB-T), digital multimedia broadcasting-satellite (DMB-S), and media forward link (MediaFLO). Digital broadcast signals can be received using digital broadcasting systems such as only), digital video broadcast-handheld (DVB-H), integrated services digital broadcast-terrestrial (ISDB-T), and the like. Of course, the broadcast receiving module 111 is configured to be suitable for all broadcasting systems that provide broadcasting signals 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.

In addition, the mobile communication module 112 transmits and receives a radio signal with 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 according to transmission and reception of a voice call signal, a video call call signal, or a text / multimedia message.

The wireless Internet module 113 is a module for wireless Internet access, and the wireless Internet module 113 can be built in or externally. Wireless Internet technologies may include Wireless LAN (Wi-Fi), Wireless Broadband (Wibro), World Interoperability for Microwave Access (Wimax), High Speed Downlink Packet Access (HSDPA), and the like.

The short range communication module 114 refers to a module for short range communication. As a short range communication technology, Bluetooth, Radio Frequency Identification (RFID), Infrared Data Association (IrDA), Ultra Wideband (UWB), ZigBee, and the like may be used.

In addition, the location information module 115 is a module for checking or obtaining the location of the mobile terminal. A representative example of the location information module 115 is a GPS (Global Position System) module. According to the current technology, the GPS module calculates distance information and accurate time information from three or more satellites, and then applies triangulation to the calculated information, thereby obtaining three-dimensional current position information according to latitude, longitude, and altitude. It can be calculated accurately. Currently, a method of calculating position and time information using three satellites and correcting the error of the calculated position and time information using another satellite is widely used. In addition, the GPS module may calculate speed information by continuously calculating the current position in real time.

Meanwhile, the A / V 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 an image frame such as a still image or a moving image obtained by the image sensor in the video communication mode or the photographing mode. The processed image frame may be displayed on the display unit 151.

The image frame processed by the camera 121 may be stored in the memory 160 or transmitted to the outside through the wireless communication unit 110. Two or more cameras 121 may be provided according to the configuration aspect of the terminal.

The microphone 122 receives an external sound signal by a microphone in a call mode, a recording mode, a voice recognition mode, etc., and processes the external sound signal into electrical voice data. The processed voice data may be converted into a form transmittable to the mobile communication base station through the mobile communication module 112 and output in the call mode. The microphone 122 may implement various noise removing algorithms for removing noise generated in the process of receiving an external sound signal.

The user input unit 130 generates input data for the user to control the operation of the terminal. The user input unit 130 may include a key pad, a dome switch, a touch pad (constant voltage / capacitance), a jog wheel, a jog switch, and the like. In particular, when the touch pad has a mutual layer structure with the display unit 151 described later, this may be referred to as a touch screen.

The sensing unit 140 detects the current state of the mobile terminal 100 such as the open / closed state of the mobile terminal 100, the position of the mobile terminal 100, the presence or absence of user contact, the orientation of the mobile terminal, the acceleration / deceleration of the mobile terminal, and the like. To generate a sensing signal for controlling the operation of the mobile terminal 100. For example, if the mobile terminal 100 is in the form of a slide phone, it may sense whether the slide phone is opened or closed. In addition, it is responsible for sensing functions related to whether the power supply unit 190 is supplied with power or whether the interface unit 170 is coupled to an external device. The sensing unit 140 may include a proximity sensor 141. This will be described later with reference to the touch screen.

The interface unit 170 serves as an interface with all external devices connected to the mobile terminal 100. For example, wired / wireless headset ports, external charger ports, wired / wireless data ports, memory card ports, ports for connecting devices with identification modules, audio input / output (I / O) ports, Video I / O (Input / Output) port, earphone port, etc. may be included.

Here, the identification module is a chip that stores various types of information for authenticating the use authority of the mobile terminal 100, and includes a user identification module (UIM) and a subscriber identify module (SIM). ), A Universal Subscriber Identity Module (“USIM”), and the like. In addition, the device equipped with the identification module (hereinafter referred to as 'identification device'), can be produced in the form of a smart card (smart card). Therefore, the identification device may be connected to the terminal 100 through a port. The interface unit 170 receives data or power from an external device and transmits the data to each component inside the mobile terminal 100 or transmits the data inside the mobile terminal 100 to an external device.

In addition, when the mobile terminal 100 is connected to an external cradle, the interface unit 170 serves as a passage through which power from the cradle is supplied to the mobile terminal 100 or inputted from the cradle by a user. Various command signals may be a passage for transmitting to the mobile terminal. Various command signals or power input from the cradle may be operated as signals for recognizing that the mobile terminal is correctly mounted on the cradle.

The output unit 150 is for outputting an audio signal, a video signal, or an alarm signal. The output unit 150 may include a display unit 151, an audio output module 152, an alarm unit 153, and the like.

The display unit 151 displays and outputs information processed by the mobile terminal 100. For example, when the mobile terminal is in a call mode, the mobile terminal displays a user interface (UI) or a graphic user interface (GUI) related to the call. When the mobile terminal 100 is in a video call mode or a photographing mode, the mobile terminal 100 displays a photographed and / or received image, a UI, or a GUI.

Meanwhile, as described above, when the display unit 151 and the touch pad form a mutual layer structure to form a touch screen, the display unit 151 may be used as an input device in addition to the output device. The display unit 151 may include a liquid crystal display, a thin film transistor-liquid crystal display, an organic light-emitting diode, a flexible display, and a three-dimensional display. 3D display). Some of these displays can be configured to be transparent so that they can be seen from the outside. This may be referred to as a transparent display. A representative example of the transparent display is a transparent organic light emitting diode (TOLED). In addition, two or more display units 151 may exist according to the implementation form of the mobile terminal 100. For example, an external display unit (not shown) and an internal display unit (not shown) may be simultaneously provided in the mobile terminal 100. The touch screen may be configured to detect a touch input pressure as well as a touch input position and area.

The proximity sensor 141 may be disposed inside or near the touch screen. The proximity sensor 141 refers to a sensor that detects the presence or absence of an object approaching a predetermined detection surface or an object present in the vicinity without using a mechanical contact by using an electromagnetic force or infrared rays. Therefore, the proximity sensor 141 has a considerably longer life than the contact sensor, and its utilization is also considerably higher.

Examples of the proximity sensor 141 include a transmission photoelectric sensor, a direct reflection photoelectric sensor, a mirror reflection photoelectric sensor, a high frequency oscillation proximity sensor, a capacitive proximity sensor, a magnetic proximity sensor, and an infrared proximity sensor.

To explain an example of the operation principle of the high frequency oscillation type proximity sensor, the oscillation amplitude of the oscillation circuit is attenuated or stopped when the sensing object approaches the sensor sensing surface while the oscillation circuit oscillates the high frequency of the positive wave. In addition, this change is converted into an electrical signal to detect the presence or absence of a sensing object. Therefore, even if a non-metallic material comes between the high frequency oscillation proximity sensor and the sensing object, the proximity switch can detect the sensing object to be detected without interference of the object.

Even if the proximity sensor 141 is not firmly mounted, when the touch screen is capacitive, the proximity sensor 141 may be configured to detect the proximity of the pointer by a change in an electric field according to the proximity of the pointer.

Therefore, when the pointer is located in close proximity to the touch screen although it is not actually touched, the position of the pointer and the distance between the pointer and the touch screen may be detected. Hereinafter, for convenience of explanation, the act of allowing the pointer to be recognized on the touch screen so that the pointer is located on the touch screen is referred to as a "proximity touch", and the pointer on the touch screen is referred to as "proximity touch". The act of actually contacting will be referred to as "contact touch". In addition, the position of the proximity touch with the pointer on the touch screen refers to a position where the pointer is perpendicular to the touch screen when the pointer is in proximity touch.

The proximity sensor 141 detects a proximity touch and a proximity touch pattern (for example, proximity touch distance, proximity touch direction, proximity touch speed, proximity touch time, proximity touch position, and proximity touch movement state). According to the detected proximity touch operation and the proximity touch pattern, corresponding information may be output on the touch screen.

The sound output module 152 outputs audio data received from the wireless communication unit 110 or stored in the memory 160 in a call signal reception, a call mode or a recording mode, a voice recognition mode, a broadcast reception mode, and the like. In addition, the sound output module 152 outputs a sound signal related to a function (eg, a call signal reception sound, a message reception sound, etc.) performed by the mobile terminal 100. The sound output module 152 may include a speaker, a buzzer, and the like.

The alarm unit 153 outputs a signal for notifying occurrence of an event of the mobile terminal 100. Examples of events occurring in the mobile terminal include call signal reception, message reception, key signal input, and touch input. The alarm unit 153 may output a signal for notifying occurrence of an event in a form other than an audio signal or a video signal. For example, the signal may be output in the form of vibration. When a call signal is received or a message is received, the alarm unit 153 may output a vibration to inform this. Alternatively, when a key signal is input, the alarm unit 153 may output a vibration in response to the key signal input. Through the vibration output as described above, the user can recognize the occurrence of the event. Of course, the signal for event occurrence notification may be output through the display unit 151 or the sound output module 152.

The memory 160 may store a program for processing and controlling the controller 180 and may provide a function for temporarily storing input / output data (for example, a phone book, a message, a still image, a video, etc.). It can also be done. In addition, the memory 160 may store data regarding vibration and sound of various patterns output when a touch input on the touch screen is performed.

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), RAM Random Access Memory (RAM) Static Random Access Memory (SRAM), Read-Only Memory (ROM), Electrically Erasable Programmable Read-Only Memory (EEPROM), Programmable Read-Only Memory (PROM) magnetic memory, It may include at least one type of storage medium of the optical disk. In addition, the mobile terminal 100 may operate a web storage that performs a storage function of the memory 160 on the Internet.

And the controller 180 typically controls the overall operation of the mobile terminal. For example, perform related control and processing for voice calls, data communications, video calls, and the like. In addition, the control unit 180 may include a multimedia module 181 for multimedia playback. The multimedia module 181 may be implemented in the controller 180 or may be implemented separately from the controller 180.

The controller 180 may perform a pattern recognition process for recognizing a writing input or a drawing input performed on the touch screen as text and an image, respectively.

The power supply unit 190 receives an external power source and an internal power source under the control of the controller 180 to supply power for operation of each component.

Various embodiments described herein may be implemented 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, embodiments described herein include application specific integrated circuits (ASICs), digital signal processors (DSPs), digital signal processing devices (DSPDs), programmable logic devices (PLDs), field programmable gate arrays (FPGAs), and the like. It may be implemented using at least one of processors, controllers, micro-controllers, microprocessors, and electrical units for performing the functions. It may be implemented by the controller 180.

In a software implementation, embodiments such as procedures or functions may be implemented with separate software modules that allow at least one function or operation to be performed. The software code may be implemented by a software application written in a suitable programming language. In addition, the software codes may be stored in the memory 160 and executed by the control unit 180. [

 In the above, the mobile terminal related to the present invention has been described in terms of components according to functions. Hereinafter, referring to FIGS. 2 and 3, the mobile terminal according to the present invention will be further described in terms of components according to appearance. In the following description, a slider type mobile terminal is described as an example among various types of mobile terminals such as a folder type, a bar type, a swing type, a slider type, and the like for clarity. Therefore, the present invention is not limited to the slider type mobile terminal, but can be applied to all types of mobile terminals including the above-described type.

2 is a perspective view of an example of a mobile terminal according to the present invention viewed from the front.

The mobile terminal 100 of the present invention includes a first body 200 and a second body 205 configured to be slidable in at least one direction on the first body 200. In the case of a folder phone, the mobile terminal 100 will include a first body and a second body configured to be folded or unfolded on at least one side of the first body.

A state in which the first body 200 is disposed to overlap with the second body 205 may be referred to as a closed configuration, and as shown in the drawing, the first body 200 may be referred to as the second body 205. The exposed state of at least a portion of the N may be referred to as an open configuration.

Meanwhile, although not shown in the drawings, the mobile terminal related to the present invention may be a folder type including a first body and a second body configured to be folded or unfolded on at least one side of the first body. Here, a state in which the second body is configured to be folded may be referred to as a closed state, and a state in which the second body is configured to be unfolded may be referred to as an open state.

Furthermore, the mobile terminal associated with the present invention may be a swing type including a first body and a second body configured to be swingable with respect to the first body, although not shown in the drawing. Here, the state in which the first body is disposed to overlap the second body may be referred to as a closed state, and the state in which a portion of the first body is exposed by swinging the second body may be referred to as an open state.

The terminal according to the folder type and the swing type is considered to be easily understood by those skilled in the art even if there is no separate description, so a detailed description thereof will be omitted.

The mobile terminal 100 operates mainly in the standby mode in a closed state, but the standby mode may be released by a user's manipulation. In addition, although the mobile terminal 100 operates mainly in a call mode or the like in an open state, the mobile terminal 100 may be switched to a standby mode by a user's manipulation or a lapse of a predetermined time.

The case (casing, housing, cover, etc.) forming the exterior of the first body 200 is formed by the first front case 220 and the first rear case 225. Various electronic components are embedded in the space formed by the first front case 220 and the first rear case 225. At least one intermediate case may be further disposed between the first front case 220 and the first rear case 225.

The cases may be formed by injecting a synthetic resin or may be formed of a metal material, for example, a metal material such as stainless steel (STS) or titanium (Ti).

The display unit 151, the audio output module 152, the camera 121, or the first user input unit 210 may be disposed on the first body 200, specifically, the first front case 220.

Since the display unit 151 has already been described with reference to FIG. 1, a detailed description thereof will be omitted for simplicity of the present specification.

The sound output module 152 may be implemented in the form of a speaker.

The camera 121 may be implemented to be suitable for capturing an image or a video of a user or the like.

Like the first body 200, the case forming the exterior of the second body 205 is formed by the second front case 230 and the second rear case 235.

The second user input unit 215 may be disposed on the second body 205, specifically, on the front face of the second front case 230.

The third user input unit 245, the microphone 122, and the interface unit 170 may be disposed in at least one of the second front case 230 or the second rear case 235.

The first to third user input units 210, 215, and 245 may be collectively referred to as the user input unit 130, and may be employed in any manner as long as the user is tactile in a tactile manner. .

For example, the user input unit may be implemented as a dome switch or a touch pad capable of receiving a command or information by a user's push or touch operation, or a wheel or jog method of rotating a key, or a manipulation method such as a joystick. May also be implemented.

In functional terms, the first user input unit 210 is for inputting a command such as start, end, scroll, etc., and the second user input unit 215 is for inputting numbers, letters, symbols, and the like. . The first user input unit 210 includes a so-called soft key used in conjunction with icons displayed on the display unit 151 and a navigation key (mainly composed of four direction keys and a center key) for direction indication and confirmation. can do.

In addition, the third user input unit 245 may operate as a hot key for activating a special function in the mobile terminal.

The microphone 122 may be implemented in a form suitable for receiving a user's voice, other sounds, and the like.

The interface unit 170 is a passage that enables the mobile terminal 100 according to the present invention to exchange data with an external device. Since the interface unit 170 has been described above with reference to FIG. 1, a detailed description thereof will be omitted.

The power supply unit 190 for supplying power to the mobile terminal 100 is mounted on the second rear case 235 side.

The power supply unit 190 may be detachably coupled for charging, for example, as a rechargeable battery.

3 is a rear perspective view of the mobile terminal of FIG. 2.

Referring to FIG. 3, a camera 121 may be additionally mounted on the rear surface of the second rear case 235 of the second body 205. The camera 121 of the second body 205 has a photographing direction substantially opposite to that of the camera 121 of the first body 200, and different pixels from the camera 121 of the first body 200. Can have

For example, the camera 121 of the first body 200 has a low pixel so that it is easy to take a picture of the user's face and transmit it to the counterpart in the case of a video call, and the camera 121 of the second body has a general structure. It is desirable to have a high pixel because the subject is often photographed and not immediately transmitted.

The flash 250 and the mirror 255 may be additionally disposed adjacent to the camera 121 of the second body 205. The flash 250 illuminates the subject when the subject is photographed by the camera 121 of the second body 205. The mirror 255 allows the user to see the user's face or the like when photographing (self-photographing) the user by using the camera 121 of the second body 205.

The sound output module 152 may be further disposed on the second rear case 235.

The sound output module 152 of the second body 205 may implement a stereo function together with the sound output module 152 of the first body 200, and may be used for a call in a speakerphone mode.

In addition, an antenna 260 for receiving a broadcast signal may be disposed on one side of the second rear case 235. The antenna 260 may be installed to be pulled out of the second body 205.

A portion of the slide module 265 that slidably couples the first body 200 and the second body 205 is disposed on the first rear case 225 side of the first body 200.

The other part of the slide module 265 may be disposed on the second front case 230 side of the second body 205 and may not be exposed to the outside as shown in the drawing.

In the above description, the second camera 121 and the like have been described as being disposed in the second body 205, but are not necessarily limited thereto.

For example, at least one or more of the components 260, 121 to 250, and 152 described as disposed in the second rear case 235, such as the camera 121 of the second body, may be the first body 200. May be mounted on the first rear case 225. If so, there is an advantage that the configuration (s) disposed in the first rear case 225 in the closed state are protected by the second body 205. Furthermore, even if the camera 121 of the second body is not provided separately, the camera 121 of the first body may be rotatably formed so that the camera 121 of the second body may be photographed up to the photographing direction of the camera 121 of the second body. .

The terminal 100 illustrated in FIGS. 1 to 3 may be operated in a communication system capable of transmitting data through a frame or packet, including a wired / wireless communication system and a satellite-based communication system. It can be configured to.

Hereinafter, referring to FIG. 4, a communication system capable of operating a terminal according to the present invention will be described.

The communication system may use different air interfaces and / or physical layers. For example, a radio interface usable by a communication system may include frequency division multiple access (FDMA), time division multiple access (TDMA), and code division multiple access (Code Division). Multiple Access (CDMA), Universal Mobile Telecommunications Systems (UMTS) (especially Long Term Evolution (LTE)), Global System for Mobile Communications (GSM), etc. May be included. Hereinafter, for convenience of description, the description will be limited to CDMA. However, it is a matter of course that the present invention is applicable to all communication systems including the CDMA wireless communication system.

As shown in FIG. 4, the CDMA wireless communication system includes a plurality of terminals 100, a plurality of base stations (BS) 270, and base station controllers (BSCs) 275. ), And a mobile switching center (MSC) 280. The MSC 280 is configured to be connected to a public switched telephone network (PSTN) 290 and is also configured to be connected to BSCs 275. The BSCs 275 may be coupled to the 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.

Each BS 270 may include at least one sector, and each sector may include an omnidirectional antenna or an antenna pointing radially out of 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, each of which has a specific spectrum (eg, 1.25 MHz, 5 MHz, etc.).

The intersection of sectors and frequency assignments may be called a CDMA channel. BS 270 may be referred to as a base station transceiver subsystem ('BTSs'). In this case, the word "base station" may be called the sum of one BSC 275 and at least one BS 270. The base station may also indicate “cell site”. Alternatively, each of the plurality of sectors for a particular BS 270 may be called a plurality of cell sites.

As shown in FIG. 4, a broadcasting transmitter (BT) 295 transmits a broadcast signal to terminals 100 operating in the system. The broadcast receiving module 111 shown in FIG. 1 is provided in the terminal 100 to receive a broadcast signal transmitted by the BT 295.

In addition, FIG. 4 illustrates multiple satellite positioning systems (GPS) satellites 300. The satellites 300 help to locate the at least one terminal of the plurality of terminals 100. Although two satellites are shown in FIG. 4, useful location information may be obtained by two or less or more satellites. The location information module 115 shown in FIG. 1 cooperates with the satellites 300 to obtain desired location information. Here, the location can be tracked using all the techniques that can track the location, not just the GPS tracking technology. In addition, at least one of the GPS satellites 300 may optionally or additionally be responsible for satellite DMB transmission.

During typical operation of a wireless communication system, BS 270 receives a reverse link signal from various terminals 100. At this time, the terminals 100 are connecting a call, transmitting or receiving a message, or performing another communication operation. Each of the reverse link signals received by a particular base station 270 is processed within by the particular base station 270. The data generated as a result of the processing is transmitted to the connected BSC 275. BSC 275 provides call resource allocation and mobility management functionality, including the organization of soft handoffs between base stations 270. In addition, the BSC 275 transmits the received data to the MSC 280, and the MSC 280 provides an additional transmission service for connection with the PSTN 290. Similarly, PSTN 290 connects with MSC 280, MSC 280 connects with BSCs 275, and BSCs 275 send BSs 270 to transmit a forward link signal to terminals 100. ).

Hereinafter, a method of adjusting a white balance of a mobile terminal according to an embodiment of the present invention will be described in detail. White balance refers to adjusting R (red), G (green), and B (blue) values so that white (grayscale) depending on lighting can be expressed in white on the screen. That is, the white balance is a technique of converting different colors based on the color estimated to be white on the screen to be photographed.

Light sources such as sunlight (morning, day and evening), incandescent lamps and fluorescent lamps have inherent color temperatures. Depending on the color temperature of the light source, the color of the subject viewed through the camera 121 may be blue or red. Therefore, when capturing an image through the camera 121, the white balance is adjusted so that the natural color of the subject can be captured as it is.

In other words, when a white subject illuminated by a light source having a specific temperature is captured by the camera 121, the encoder output of the camera 121 should be in a state in which the subcarrier is 0 (electric achromatic color). In this way, adjusting the gain of R, G, and B so that the subcarriers become zero in accordance with the color temperature is said to adjust the white balance.

Here, the color temperature refers to the temperature of the light source corresponding to each color when the color changes according to the temperature of the light source, and indicates that the color varies according to the temperature of the light source as an absolute temperature based on white.

The camera 121 displays a subject coming through the lens on a viewfinder screen. The camera 121 is composed of an image sensor for converting the image of the subject coming through the lens into an electrical signal. For example, the camera 121 may include a charge coupled device (CCD) sensor and a complementary metal oxide (CMOS) sensor.

An image captured by the camera 121 may be stored in the memory 160. The image may be divided into a still image and a moving image, and stored.

The display unit 151 may display an image captured by the camera 121 by using a preview function or display an image reproduced when an image previously stored in the memory 160 is reproduced. In addition, the display unit 151 may serve as a viewfinder (view window) used when checking whether a subject to be photographed before entering the angle has entered an angle.

When the white balance setting function (menu) is selected on the viewfinder screen, the controller 180 switches to an operation mode for setting the white balance. If a color is designated on the viewfinder screen through a touch, the controller 180 obtains (confirms) color information of a point where the touch is detected. Here, the controller 180 can detect the touch through the sensing unit 140.

The controller 180 sets a white balance reference value using the obtained color information, and transmits the set reference value to the camera 121. That is, the controller 180 adjusts the white balance of the camera 121 based on a user input. The camera 121 performs white balance based on the set reference value under the control of the controller 180.

5 is a flowchart illustrating a white balance adjustment method of a mobile terminal according to an embodiment of the present invention.

First, the controller 180 drives the camera 121 according to a user input in operation S101. The controller 180 displays an image provided from the camera 121 on the screen of the viewfinder. Here, the camera 121 converts an image of a subject introduced through a lens into an electrical signal and transmits the converted electrical signal to the controller 180. The controller 180 displays the subject coming through the lens of the camera 121 on the display unit 151. Accordingly, the user may check whether the desired subject is correctly entered on the screen through the screen of the display unit 151. That is, the display unit 151 may serve as a viewfinder.

When the white balance setting menu is selected while checking whether the desired image is on the screen through the viewfinder, the controller 180 switches to a mode for setting a reference value to be used when performing white balance (S103).

Thereafter, the controller 180 detects a touch input on the viewfinder screen (S105). That is, when the touch of the pointer is detected on the viewfinder screen, the sensing unit 140 notifies the controller 180 of the position information of the detected touch point. Here, the touch point is one point of the white subject. If the subject to be photographed does not have white color, the user makes a white subject enter the viewfinder and then touches a point of the white subject.

The controller 180 acquires color information of the touch point detected by the sensing unit 140 and sets it as a reference value (S107). Here, the controller 180 may check the color information based on the image transmitted from the camera 121 or the image transmitted from the camera 121 and the position information transmitted from the sensing unit 140.

When the white balance setting function is completed, the controller 180 adjusts the white balance of the camera 121 to the set reference value (S109 and S111). That is, when the reference value of the white balance is set, the controller 180 transmits the set reference value to the camera 121, and the camera 121 performs white balance based on the reference value.

When the white balance setting function is not selected in step S103, the controller 180 adjusts the white balance of the camera 121 through preset color information. That is, the controller 180 transmits color information previously stored in the memory 160 to the camera 121, and the camera 121 performs white balance based on the received color information.

6 is an exemplary diagram illustrating an example of adjusting a white balance in a mobile terminal according to an embodiment of the present invention.

Referring to FIG. 6, when a user selects a camera function for capturing an image, the controller 180 drives the camera 121 and the camera 121 is displayed on the screen of the display unit 151 serving as a viewfinder. To display the subject coming through the lens. When the white balance adjustment is required while checking the composition and the white balance of the image to be photographed through the display unit 151, the user selects a white balance setting function displayed on the screen of the display unit 151. That is, the user touches the pointer on the white balance setting icon displayed on the display screen. At this time, the sensing unit 140 detects the touch of the pointer and generates a signal corresponding to the detected touch point and transmits the signal to the controller 180.

When the controller 180 detects a touch on the white balance setting icon through the sensing unit 140, the controller 180 switches to the white balance setting mode. If a white subject exists in the image displayed on the screen of the display unit 151, one point of the white subject is selected.

However, if the white subject does not exist in the image displayed on the display screen, the lens direction of the camera 121 is moved to allow the white subject to enter the display screen. When a white subject is displayed on the display screen by moving the lens 121 in the lens direction, one point of the white subject is selected. That is, as shown in the figure, the pointer touches a point of the white subject displayed on the display screen.

The controller 180 checks the color information of the touch point and sets the checked color information as a white balance reference value. Subsequently, the controller 180 transmits the set reference value to the camera 121. That is, the controller 180 informs the camera 121 of which color is white among the images transmitted from the camera 121 at the current photographing place. The camera 121 performs white balance based on the reference value.

7 is a diagram illustrating another example of adjusting a white balance in a mobile terminal according to an embodiment of the present invention.

As shown in FIG. 7, when the environment setting menu is selected during shooting, the controller 180 displays an environment setting screen and selects a user designation of the white balance menu from the displayed environment setting screen. The controller 180 switches the operation mode to the white balance setting mode.

Then, the user moves the lens direction of the camera 121 to the place where the white subject is located. The camera 121 transmits an image received through the lens to the controller 180. The controller 180 displays an image received from the camera 121 on a display screen.

When a touch is detected in a specific area of an image displayed on the display screen, the sensing unit 140 detects the touch and transmits the touch to the control unit 180. The controller 180 checks color information corresponding to the touch point detected by the sensing unit 140. In addition, the controller 180 sets the checked color information as a white balance reference value.

Thereafter, the camera 121 performs white balance based on the set reference value under the control of the controller 180.

8 is an exemplary diagram illustrating an example of adjusting a white balance in a mobile terminal according to another embodiment of the present invention. This embodiment describes a case of adjusting the white balance in the photo album function.

As shown in the figure, when a user selects a photo album menu through a menu operation to check a pre-recorded picture, the controller 180 displays a list of pictures stored in the memory 160 in the form of text or thumbnails. Mark on.

When any one picture is selected from the list of pictures displayed on the display screen, the controller 180 displays the selected picture on the entire screen of the display unit 151.

Subsequently, when the white balance of the picture displayed on the full screen of the display unit 151 is to be adjusted, the user selects an edit menu and selects a white balance from among sub menus provided in the selected edit menu.

When the white balance is selected from the sub menus, the controller 180 switches to a setting mode for adjusting the white balance. The controller 180 senses a touch through the sensing unit 140, obtains color information of the touch point, and sets the white balance reference value. In this case, if a white subject does not exist in the selected picture, the camera 121 is driven to enter the viewfinder and the white subject is touched to inform white of the white subject.

When setting of the white balance reference value is completed, the controller 180 adjusts the white balance of the selected picture based on the set reference value.

In addition, according to an embodiment of the present invention, the above-described method may be embodied as computer readable codes on a medium in which a program is recorded. The computer-readable medium includes all kinds of recording devices in which data that can be read by a computer system is stored. Examples of the computer-readable medium include ROM, RAM, CD-ROM, magnetic tape, floppy disk, optical data storage, and the like, and also implemented in the form of a carrier wave (for example, transmission over the Internet) . In addition, the computer may include the controller 180 of the terminal.

The mobile terminal described above may not be limitedly applied to the configuration and method of the above-described embodiments, but the embodiments may be configured by selectively combining all or some of the embodiments so that various modifications may be made. It may be.

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

Figure 2 is a perspective view from the front of an example of a mobile terminal according to the present invention.

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

4 is a block diagram of a wireless communication system that can operate a mobile terminal according to an embodiment of the present invention.

5 is a flowchart illustrating a method of adjusting a white balance of a mobile terminal according to an embodiment of the present invention.

6 is an exemplary diagram illustrating an example of adjusting a white balance in a mobile terminal according to an embodiment of the present invention.

7 is an exemplary view showing another example of adjusting the white balance in the mobile terminal according to an embodiment of the present invention.

8 is an exemplary diagram illustrating an example of adjusting a white balance in a mobile terminal according to another embodiment of the present invention.

[Explanation of symbols on the main parts of the drawings]

100: mobile terminal 110: wireless communication unit

120: A / V input unit 130: user input unit

140: sensing unit 150: output unit

160: memory 170: interface unit

180: control unit 190: power supply unit

Claims (10)

A camera for acquiring an image; A display unit displaying a viewfinder screen containing an image to be photographed by the camera; And a controller configured to set color information of a specific point on the viewfinder screen as a white balance reference value and adjust the white balance of the camera based on the set reference value. The method of claim 1, wherein the control unit, And detecting a touch at a specific point on the viewfinder screen and acquiring a color temperature of the detected touch point. The method of claim 2, wherein the touch point, And a point of a white subject displayed on the view feeder screen. The method of claim 1, wherein the camera, And a white balance based on the set reference value. The method of claim 1, wherein the reference value, A mobile terminal, characterized in that the color temperature of the white measured at the place to shoot. Switching to a white balance setting mode according to a white balance setting request during shooting; Acquiring color information of a specific point on a viewfinder screen after switching the setting mode; Setting the obtained color information as a white balance reference value; And adjusting the white balance based on the set reference value. The method of claim 6, wherein the obtaining of color information comprises: Detecting a touch at a point on the viewfinder screen; And acquiring color information of the detected touch point. The method of claim 7, wherein the touch point, White balance adjustment method of the mobile terminal, characterized in that one point of the white subject displayed on the viewfinder screen. The method of claim 6, wherein the reference value, White balance adjustment method of the mobile terminal, characterized in that the color temperature of the white subject in the shooting place. The method of claim 6, wherein the white balance adjustment step, Transmitting the set reference value to a camera; And setting the camera to perform white balance based on the set reference value.

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