KR101430460B1 - Mobile terminal, charging efficiency display device, and charging efficiency display method of solar cell - Google Patents

Abstract

The present invention relates to a mobile terminal capable of displaying the efficiency of a solar cell.

A mobile terminal according to an embodiment of the present invention includes a power supply unit having a solar cell that generates electricity according to an amount of light to be irradiated; A sensing unit for detecting an amount of power generation of the solar cell; A memory for storing light amount data based on an amount of light to be irradiated; A control unit for comparing the detected power generation amount with light amount data stored in the memory and calculating a charging efficiency of the solar cell using the compared result; And a display unit for displaying the calculated charging efficiency.

Description

TECHNICAL FIELD [0001] The present invention relates to a mobile terminal, a charging efficiency display device, and a charging efficiency displaying method for a solar cell. [0002] MOBILE TERMINAL, DEVICE FOR DISPLAYING CHARGING EFFICIENCY AND METHOD FOR DISPLAYING CHARGING EFFICIENCY OF SOLAR BATTERY [

The present invention relates to a mobile terminal capable of displaying the charging efficiency of a solar cell.

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

Further, efforts for supporting and increasing the functions of the mobile terminal continue. Such efforts include not only changes and improvements in structural components that form the mobile terminal, but also improvements in software or hardware.

Also, in recent years, mobile terminals are being studied for a mobile terminal having a higher charging efficiency.

An object of the present invention is to provide a mobile terminal and a charging efficiency display device capable of displaying a charging efficiency of a solar cell by comparing a power generation amount of the solar cell with light amount data.

According to an aspect of the present invention, there is provided a solar battery module comprising: a power supply unit including a solar cell for generating electricity according to an amount of light to be irradiated; A sensing unit for detecting an amount of power generation of the solar cell; A memory for storing light amount data based on an amount of light to be irradiated; A control unit for comparing the detected power generation amount with light amount data stored in the memory and calculating a charging efficiency of the solar cell using the compared result; And a display unit for displaying the calculated charging efficiency.

According to an aspect of the present invention, there is provided a solar battery comprising: a solar cell for generating electricity according to an amount of light to be irradiated; A sensing unit for detecting an amount of power generation of the solar cell; A memory for storing light amount data based on an amount of light to be irradiated; A control unit for comparing the detected power generation amount with light amount data stored in the memory and calculating a charging efficiency of the solar cell using the compared result; And a display unit for displaying the calculated charging efficiency.

According to an aspect of the present invention, there is provided a method of manufacturing a solar cell, including: generating electricity according to an amount of light irradiated by a solar cell; Detecting a generation amount of the solar cell; Comparing the detected power generation amount with the stored light amount data, and calculating the charging efficiency using the compared result; And a step of displaying the calculated charging efficiency.

The mobile terminal and the charging efficiency display device according to an embodiment of the present invention can display the charging efficiency of the solar cell.

Hereinafter, a mobile terminal related to the present invention will be described in detail with reference to the drawings.

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

The mobile terminal may be implemented in various forms. For example, the mobile terminal described in this specification may be a mobile phone, a smart phone, a notebook computer, a digital broadcasting terminal, a PDA (Personal Digital Assistants), a PMP (Portable Multimedia Player) have.

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, An interface unit 170, a control unit 180, a power supply unit 190, and the like. 1 shows a mobile terminal having various components. However, not all illustrated components are required. A mobile terminal may be implemented by more components than the illustrated components, or a mobile terminal may be implemented by fewer components.

Hereinafter, the components will be described in order.

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

The broadcast receiving module 111 receives broadcast signals and / or broadcast-related information from an external broadcast management server through a broadcast channel. The broadcast channel may include a satellite channel and a terrestrial channel. The broadcast management server may refer to a server for generating and transmitting broadcast signals and / or broadcast related information, or a server for receiving broadcast signals and / or broadcast related information generated by the broadcast management server and transmitting the generated broadcast signals and / or broadcast related information. The broadcast-related information may refer to a broadcast channel, a broadcast program, or information related to a broadcast service provider. 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.

Meanwhile, the broadcast related information may be provided through a mobile communication network, and 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).

The broadcast receiving module 111 receives broadcasting signals using various broadcasting systems. In particular, the broadcasting receiving module 111 may be a Digital Multimedia Broadcasting-Terrestrial (DMB-T), a Digital Multimedia Broadcasting-Satellite (DMB-S) Only Digital 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 radio signals to at least one of a base station, an external terminal, and a server on a mobile communication network. Here, the wireless signal may include various types of data depending on a voice call signal, a video call signal, or a text / multimedia message transmission / reception.

The wireless Internet module 113 is a module for wireless Internet access, and the wireless Internet module 113 can be built in or externally.

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, etc. may be used as a short distance communication technology.

The location information module 115 is a module for confirming or obtaining the location of the mobile terminal. One example is the GPS (Global Position System) module. The GPS module receives position information from a plurality of satellites. Here, the location information may include coordinate information indicated by latitude and longitude. For example, the GPS module can accurately calculate the current location according to the triangulation method by measuring the precise time and distance from three or more satellites and measuring three different distances. A method of obtaining distance and time information from three satellites and correcting the error by one satellite may be used. In particular, the GPS module can acquire latitude, longitude and altitude as well as three-dimensional velocity information and accurate time from the position information received from the satellite.

An audio / video (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. Then, the processed image frame can be displayed on the display unit 151. [

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

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. The microphone 122 may be implemented with various noise reduction algorithms for eliminating noise generated in the process of receiving an external sound signal.

The user input unit 130 generates input data for a user to control the operation of the terminal. The user input unit 130 may include a key pad dome switch, a touch pad (static / static), a jog wheel, a jog switch, and the like. Particularly, when the touch pad has a mutual layer structure with the display unit 151, which will be described later, it can be called a touch screen.

The sensing unit 140 senses the current state of the mobile terminal 100 such as the open / close state of the mobile terminal 100, the position of the mobile terminal 100, the presence or absence of user contact, the orientation of the mobile terminal, And generates a sensing signal for controlling the operation of the mobile terminal 100. For example, when the mobile terminal 100 is in the form of a slide phone, it is possible to sense whether the slide phone is opened or closed. Also, it is responsible for a sensing function related to whether or not the power supply unit 190 is powered on, whether the interface unit 170 is connected to an external device, and the like.

The interface unit 170 serves as an interface with all external devices connected to the mobile terminal 100. For example, a wired / wireless headset port, an external charger port, a wired / wireless data port, a memory card port, a port for connecting a device having an identification module, an audio I / O port, Video input / output (I / O) ports, earphone ports, and the like.

Here, the identification module is a chip that stores various information for authenticating the use right of the mobile terminal 100, and includes a user identification module (UIM), a subscriber identity module (SIM) ), A Universal Subscriber Identity Module (" USIM "), and the like. In addition, an apparatus having an identification module (hereinafter referred to as 'identification device') can be manufactured in a smart card format. Accordingly, the identification device can be connected to the terminal 100 through the port. The interface unit 170 receives data from an external device or receives power from the external device to transfer the data to each component in the mobile terminal 100 or to transmit data in the mobile terminal 100 to an external device.

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, and an alarm unit 153.

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

Meanwhile, as described above, when the display unit 13 and the touch pad have a mutual layer structure to constitute a touch screen, the display unit 151 can be used as an input device in addition to the output device. The display unit 151 may be a liquid crystal display, a thin film transistor-liquid crystal display, an organic light-emitting diode, a flexible display, a three-dimensional display 3D display). In addition, there may be two or more display units 151 according to the embodiment of the mobile terminal 100. For example, the mobile terminal 100 may be provided with an external display unit (not shown) and an internal display unit (not shown) at the same time.

The audio output module 152 outputs audio data received from the wireless communication unit 110 or stored in the memory 160 in a call signal reception mode, a call mode or a recording mode, a voice recognition mode, a broadcast reception mode, The sound output module 152 outputs an acoustic signal related to functions (e.g., call signal reception sound, message reception sound, etc.) performed in 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 the occurrence of an event of the mobile terminal 100. Examples of events that occur in the mobile terminal include receiving a call signal, receiving a message, and inputting a key signal. The alarm unit 153 may output a signal for informing occurrence of an event in a form other than an audio signal or a video signal. For example, it is possible to output a signal in a vibration mode. When a call signal is received or a message is received, the alarm unit 153 can output a vibration to notify it. Alternatively, when the key signal is input, the alarm unit 153 can output the vibration by the feedback to the key signal input. The user can recognize the occurrence of an event through the above-mentioned vibration output. Of course, a signal for notifying the occurrence of an event may also be output through the display unit 151 or the audio output module 152.

The memory 160 may store a program for processing and controlling the control unit 180 and may store a function for temporarily storing input / output data (e.g., a phone book, a message, a still image, .

The memory 160 may be a flash memory type, a hard disk type, a multimedia card micro type, a card type memory (for example, SD or XD memory), a RAM (Random Access Memory) SRAM (Static Random Access Memory), ROM (Read Only Memory), EEPROM (Electrically Erasable Programmable Read-Only Memory), PROM (Programmable Read- And an optical disc. In addition, the mobile terminal 100 may operate a web storage for storing the memory 150 on the Internet.

The control unit 180 typically controls the overall operation of the mobile terminal. For example, voice communication, data communication, video communication, 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 control unit 180 or may be implemented separately from the control unit 180. [

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 computer-readable recording medium using, for example, software, hardware, or a combination thereof.

According to a hardware implementation, the embodiments described herein may be implemented as application specific integrated circuits (ASICs), digital signal processors (DSPs), digital signal processing devices (DSPDs), programmable logic devices (PLDs), field programmable gate arrays May be implemented using at least one of processors, controllers, micro-controllers, microprocessors, and electrical units for performing functions. In some cases, And may be implemented by the control unit 180.

According to a software implementation, embodiments such as procedures or functions may be implemented with separate software modules that perform at least one function or operation. 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 foregoing, the mobile terminal related to the present invention has been described in terms of components according to functions. Hereinafter, the mobile terminal related to the present invention will be further described with reference to FIGS. 2 and 3 in view of the components according to the outline. Hereinafter, a slider type mobile terminal will be described as an example of various types of mobile terminals such as a folder type, a bar type, a swing type, a slider type, Therefore, the present invention is not limited to a slider type mobile terminal but can be applied to all types of mobile terminals including the above-mentioned type.

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

The mobile terminal of the present invention includes a first body 200 and a second body 205 configured to be slidable along at least one direction on the first body 200.

The state where the first body 200 is disposed in a state of being overlapped with the second body 205 may be referred to as a closed configuration and the first body 200 may be referred to as a second body 205 ) May be referred to as an open configuration.

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

The casing (casing, housing, cover, etc.) constituting the outer appearance of the first body 200 is formed by the first front case 220 and the first rear case 225. Various electronic components are installed in a space formed by the first front case 220 and the first rear case 225. At least one intermediate case may be additionally disposed between the first front case 220 and the first rear case 225.

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).

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

The display module 151 includes a liquid crystal display (LCD), organic light emitting diodes (OLED), and the like, which visually represent information.

In addition, the display module 151 may overlap the touch pad in a layer structure, so that the display unit 151 may operate as a touch screen to enable information input by a user's touch.

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

The camera 121 may be implemented so as to be suitable for photographing an image or a moving image for a user or the like.

As in the case of the first body 200, the case constituting the outer appearance 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 front surface of the second body 205, specifically, the second front case 230.

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

The first to third user input units 210, 215 and 245 may be collectively referred to as a manipulating portion 130. If the user operates in a tactile manner with a tactile impression, Can be employed.

For example, the user input unit may be implemented by a dome switch or a touch pad capable of receiving a command or information by a push or a touch operation of a user, or may be a wheel, a jog type, a joystick, or the like Can also be implemented.

In a functional aspect, the first user input unit 210 is for inputting commands such as start, end, scrolling, etc., and the second user input unit 215 is for inputting numbers, letters, symbols and the like.

Also, the third user input unit 245 may operate as a hot-key for activating a special function in the portable terminal.

The microphone 122 may be implemented in a form suitable for receiving voice, sound, etc. of the user.

The interface unit 170 is a path for allowing a mobile terminal related to the present invention to exchange data with an external device. For example, the interface unit 170 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, (wireless Lan port), etc.), or power supply terminals for supplying power to the mobile terminal.

The interface unit 170 may be a card socket for accommodating an external card such as a subscriber identification module (SIM) or a user identity module (UIM) or a memory card for storing information.

And a power supply unit 190 for supplying power to the (mobile terminal) is mounted on the second rear case 235 side.

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

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

Referring to FIG. 3, a camera 121 may further be 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 which is substantially opposite to that of the camera 121 of the first body 200. The camera 121 of the first body 200 and the camera 121 of the first body 200, And different pixels.

For example, the camera 121 of the first body 200 has low pixels so that it is easy to capture a face of a user in the case of a video call or the like and transmit it to the other party, and the camera 121 of the second body Since it is often the case that a subject is photographed and not immediately transferred, it is preferable to have a high pixel.

A flash 250 and a 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 of the subject is photographed by the camera 121 of the second body 205. The mirror 255 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 camera 121 of the second body 205.

The second rear case 235 may further include an acoustic output module 152.

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 broadcast signals may be disposed on one side of the second rear case 235 in addition to the antenna for communication. The antenna 260 may be installed to be detachable from the second body 205 (2).

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 in this figure.

The second camera 121 and the like are disposed on the second body 205, the present invention is not limited thereto.

For example, at least one of the configurations 260, 121 to 250, and 152 described as being disposed in the second rear case 235, such as the camera 121 of the second body, It is also possible that the first rear case 225 is mounted to the rear case 225. In such a case, there is an advantage that the configuration (s) arranged in the first rear case 225 in the closed state is protected by the second body 205. Further, even if the camera 121 of the second body is not separately provided, the camera 121 of the first body may be configured to be rotatable so that the camera 121 of the second body can be photographed up to the photographing direction .

The terminal 100 shown in Figs. 1 to 3 is operable in a communication system capable of transmitting data through a frame or a packet, including a wired / wireless communication system and a satellite-based communication system .

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

The communication system may use different air interfaces and / or physical layers. For example, wireless interfaces that can be used by communication systems include, but are not limited to, 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) . Hereinafter, for the sake of convenience of description, the description will be limited to CDMA. However, the present invention is applicable to all communication systems including CDMA wireless communication systems.

4, the CDMA wireless communication system includes a plurality of terminals 100, a plurality of base stations (BSs) 270, and base station controllers (BSCs) 275 , And a mobile switching center ('MSC') 280. MSC 280 is configured to be coupled to a Public Switched Telephone Network (" PSTN ") 290, and is also configured to be coupled to 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.

Each BS 270 may comprise at least one sector, and each sector may comprise an omnidirectional antenna or an antenna pointing to a particular direction of radial from 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 has 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. BS 270 may be referred to as a Base Station Transceiver Subsystem (BTSs). In this case, the word "base station" may be referred to as a combination of one BSC 275 and at least one BS 270. [ 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.

4, a broadcasting transmitter (BT) 295 transmits a broadcasting signal to the terminals 100 operating in the system. The broadcast 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 several Global Positioning System ('GPS') satellites 300. The satellites 300 help to locate at least one of the plurality of terminals 100. Although two satellites are shown in Figure 4, useful location information may be obtained by two or more satellites. The GPS module 115 shown in FIG. 1 cooperates with satellites 300 to obtain desired location information. Here, you can track your location using all of the technologies that can track your location, as well as your GPS tracking technology. Also, at least one of the GPS satellites 300 may optionally or additionally be responsible for satellite DMB transmission.

Among the typical operations of a wireless communication system, the BS 270 receives a reverse link signal from the various terminals 100. At this time, the terminals 100 are in the process of 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. The BSC 275 also transmits the received data to the MSC 280 and the MSC 280 provides additional transmission services for connection with the PSTN 290. [ Similarly, the PSTN 290 connects to the MSC 280, the MSC 280 connects to the BSCs 275, and the BSCs 275 communicate with the BSs 270 ).

Meanwhile, the mobile terminal 100 may include a solar cell in the power supply unit 190 to supply power. Solar cells are photovoltaic cells designed to convert solar energy into electrical energy. In this case, the mobile terminal 100 can display the charging efficiency of the solar cell. In this case, the user can change the position of the mobile terminal based on the display of the charging efficiency of the solar cell, thereby increasing the charging efficiency of the solar cell.

Further, according to an embodiment of the present invention, the charging efficiency indication of the solar cell can be displayed using the charging efficiency indication device. The charging efficiency indicator may be provided in the mobile terminal 100 or separately from the mobile terminal 100. Accordingly, the charging efficiency of the solar cell can be displayed through the mobile terminal 100 and can also be displayed through the charging efficiency indicator.

A method of displaying a charging efficiency of a solar cell according to an embodiment of the present invention will now be described.

5 is a flowchart illustrating a method of displaying the charging efficiency of a solar cell according to an embodiment of the present invention. It can be applied to the charge efficiency display device shown in Fig.

6 is a block diagram of a charge efficiency indicator associated with an embodiment of the present invention. The charging efficiency display 600 includes a solar cell 610, a sensing unit 620, a control unit 630, a memory 640, display units 650 and 690, an alarm unit 660, a speaker 670, A charge pump 680, and the like.

Hereinafter, a method of displaying the charging efficiency of the solar cell will be described with reference to FIGS. 5 and 6. FIG.

First, the solar cell 610 can convert solar energy into electrical energy based on the amount of light to be irradiated (S10). That is, the solar cell 610 can generate solar energy based on the amount of light to be irradiated. The solar cell 610 may be installed in the power supply unit 190 of the mobile terminal 100.

The power generation amount of the solar cell 610 is detected through the sensing unit 620 (S20). The sensing unit 620 may be included in the sensing unit 140 of the mobile terminal 100. The sensing unit 620 may include a photo sensor 621, a log compression circuit 623, and an ADC conversion unit 625.

The photosensor 621 refers to a semiconductor diode or the like for converting an optical signal into an electric signal in the same manner as the solar cell 610. When the p-n junction of the diode is biased in the reverse direction and light is applied to the junction, the generated electrons and holes move along the electric field of the junction and the photocurrent flows. At this time, an output voltage almost proportional to the intensity of light is generated. In order to facilitate this phenomenon, a diode having a large junction area for light receiving (light receiving) may be sealed in a glass lens or a metal case with a window, or may be molded or enclosed in a ceramic case. In addition to the p-n junction, a Schottky barrier is used to increase the speed. An example of a photosensor is a photodiode, and a photodiode is made of germanium, silicon, or compound semiconductor. The wavelength of the highest sensitivity of the optical characteristic is determined according to the energy of the forbidden band of these semiconductors. The photosensitivity of these wavelengths sharply decreases, and the shorter wavelengths are also lowered by absorption of electrons and holes on the semiconductor surface. For this reason, a Schottky barrier diode having a pin diode with a pin junction formed by thinning the surface layer, an intrinsic semiconductive layer (i layer) with a low resistance and a metal electrode directly attached to the semiconductor has been developed have. Pin diodes are especially good in photoelectric conversion efficiency.

When the power generation amount of the solar cell 610 is detected using the photosensor 621, it is possible to reduce the amount of power consumed for detection. That is, since there is no electric power applied to the photosensor 621 among the developed electric power, it is possible to reduce the consumption of electric power used for detection.

The power generation amount of the solar cell 610 detected through the photosensor 621 is applied to the log compression circuit 623. The logarithmic compression circuit 623 can detect a wider range of power generation amount. The current applied to the log compression circuit 623 is converted into a voltage and output.

The voltage output from the log compression circuit 623 is applied to an ADC (Digital to Analog Converter) 625. The voltage applied to the ADC converter 625 is converted into a digital value. And the converted value is input to the control unit 630. That is, the power generation amount of the solar cell 610 detected through the photosensor 621 is converted into a voltage via the log compression circuit 623, converted into a digital value via the ADC conversion unit 625, ). Of course, the log compression circuit and the ADC conversion unit may be classified into the sensing unit 620, but may be classified into the control unit 630 and included in the control unit 630.

The control unit 630 may calculate the charging efficiency of the solar cell by comparing the power generation amount of the solar cell 610 converted into the digital value with the light amount data stored in the memory 640 (S30). The light amount data can be set by the user in advance based on the amount of light to be irradiated. For example, the user can input a value obtained by numerically calculating the amount of light vertically irradiated from the light source as light amount data, and store the value in the memory 640. That is, the amount of light that can be irradiated at the maximum distance from the light source can be stored as the light amount data. The memory 640 may be included in the memory 160 of the mobile terminal 100.

The control unit 630 compares the stored light amount data with the detected power generation amount (the amount converted into the digital value), and calculates the charging efficiency of the solar cell using the compared result (S30). (The amount converted into a digital value) is 85 based on the amount of light to be irradiated and the light amount data value based on the amount of light similarly irradiated is 100, the charging efficiency is calculated as 85% .

The control unit 630 may display the calculated charging efficiency on the display unit 650 (S60). In this case, if the calculated charging efficiency is less than or equal to the threshold value, the user can be informed of the charging efficiency (S40, S50). For example, you can print a warning message. The warning message may be output as a voice message or alarm sound through the speaker 670 or may display the calculated charging efficiency on the display unit 650 as a message. In addition, when the calculated charging efficiency is less than or equal to the threshold value, the controller 630 may output the vibration through the alarm unit 660 to notify the user. The threshold value may be set by the user or may be defaulted. The controller 630 may be included in the controller 180 of the mobile terminal 100.

7 is a diagram showing an example of displaying the charging efficiency of the solar cell.

As shown in the figure, the controller 630 can display the calculated charging efficiency of the solar cell through the icon 701 of the sun shape. When the charging efficiency of the solar cell 610 is good, the shaded area is widened and the charging efficiency of the solar cell 610 is poor, the shaded part of the icon 701 is reduced. 7B shows that the edge portion of the icon 701 blinks when the charging efficiency falls below the threshold value. That is, the user can know that the charging efficiency is not good due to the blinking of the edge of the icon 701. [ In this case, the user can move the solar cell 610 to a well-charged position to increase the charging efficiency.

FIG. 8 is a diagram showing an example in which the charging efficiency of a solar cell is displayed using an LED (Light Emitting Diode).

As shown in the figure, the charging efficiency of the solar cell calculated by the controller 630 can be displayed using the light emitting device 801 provided with the LED. That is, the control unit 630 can turn on the light emitting element based on the charging efficiency. For example, in a case where the light emitting device 100 is provided and the calculated charging efficiency is 20%, the charging efficiency can be displayed by turning on only 20 light emitting devices. Using such a method, the user can visually check the charging efficiency of the solar cell at a glance. In addition, when the charging efficiency falls below the threshold value, the controller 630 can display the charging efficiency in the borders of the portion that numerically displays the charging efficiency (803).

According to an embodiment of the present invention, when the display unit 650 is turned on, the controller 630 may control the brightness of the display unit 650 based on the intensity of the ambient light. For example, when the brightness of ambient light is bright (for example, during the day), the brightness of the display unit 650 is brightened. When the brightness of the surrounding light is low (for example, at night) The brightness of the light source 650 can be controlled to be lower than that of the surrounding light. And the power consumption can be reduced through the control of the controller 630.

The components of the charging efficiency indicator 600 of the solar cell may be included in the components of the same name of the mobile terminal 100. In this case, the mobile terminal 100 is provided with a charging efficiency indicator 600 for a solar cell.

Further, according to an embodiment of the present invention, the above-described method can be implemented as computer-readable code on a medium on 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) . Further, the computer may include a control unit of the terminal.

The mobile terminal and the charging efficiency display device capable of displaying the charging efficiency of the solar cell described above are not limited in the configuration and the method of the embodiments described above but the embodiments can be variously modified All or some of the embodiments may be selectively combined.

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

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

3 is a rear perspective view of a mobile terminal according to an embodiment of the present invention.

4 is a block diagram of a wireless communication system in which a mobile terminal can operate in accordance with an embodiment of the present invention.

5 is a flowchart illustrating a method of displaying the charging efficiency of a solar cell according to an embodiment of the present invention.

6 is a block diagram of a charging efficiency display device according to an embodiment of the present invention.

7 to 8 are diagrams showing an example of a method of displaying the charging efficiency of a solar cell according to an embodiment of the present invention.

Claims (11)

A power supply unit having a solar cell for generating electricity according to an amount of light to be irradiated; A sensing unit for detecting an amount of power generated by the solar cell; A memory for storing light amount data based on the amount of light to be irradiated; A control unit for comparing the detected power generation amount with light amount data stored in the memory and calculating a charging efficiency of the solar cell using the compared result; And And a display unit for displaying the calculated charging efficiency, Wherein the sensing unit includes a photosensor for converting solar energy into electric energy, Wherein the power generation amount of the solar cell is detected using the photosensor. delete The method according to claim 1, Wherein the display unit includes an LED, Wherein the control unit turns on a light emitting element provided on the LED based on the charging efficiency. The method according to claim 1, Further comprising at least one of a speaker for outputting an audio signal and an alarm for outputting vibration, Wherein the control unit informs the user of at least one of a warning sound output, a vibration output, and a specific indication of the display unit when the calculated charging efficiency is equal to or less than a threshold value. The apparatus of claim 1, wherein the control unit Wherein the brightness of the display unit is adjusted based on the intensity of the light when the display unit is on. delete delete delete delete A method for displaying a charging efficiency of a solar cell, Generating electricity according to an amount of light irradiated by the solar cell; Detecting a generation amount of the solar cell; Comparing the detected power generation amount with stored light amount data, and calculating a charging efficiency using the compared result; And And displaying the calculated charging efficiency, Wherein the detecting step is performed using a photosensor that converts solar energy into electrical energy. delete

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