JP2009282320A - Portable terminal device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a portable terminal device capable of reducing secular deterioration by suitably controlling the lighting time of a display part. <P>SOLUTION: The portable terminal device is provided with a display part 58 lit for a predetermined period of time, a lighting period counting part 50 for counting the lighting period of the display part 58, an accumulative lighting period DB 51 for accumulatively storing the lighting period counted by the lighting period counting part 50, a lighting period DB 52 for storing the accumulative lighting period as an accumulative lighting period threshold value and storing the lighting period of the display part 58 determined according to the accumulative lighting period threshold value, an accumulative lighting period comparison part 53 for comparing the accumulative lighting period stored in the accumulative lighting period DB 51 with the accumulative lighting period threshold value stored in the lighting period DB 52, and a lighting period setting part 54 for setting a lighting period of the display part 58 based on the comparison result. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a mobile terminal device, and more particularly to a mobile terminal device that suitably controls a display unit.

  In recent years, a display unit in which pixels are formed of a self-luminous display element is mounted on a portable terminal device.

In particular, an organic EL display composed of organic EL elements has advantages such as higher visibility than a liquid crystal display (LCD, Liquid Crystal Display), no backlight, and high response speed.

  The lighting brightness of a self-luminous display element such as an organic EL element is controlled by the amount of current flowing through the display element, and the degree of deterioration of the display element depends on the amount of current and the light emission time. For this reason, in a display unit using a self-luminous display element, the luminance of the display element decreases with the passage of time and deterioration due to the influence of oxygen and moisture. It has a feature that an attached pattern occurs.

  In particular, in an active matrix organic EL display in which a thin film transistor (TFT) is arranged and driven in each pixel, TFT deterioration is significant, so that long-term life is ensured while ensuring sufficient image quality. There was a problem.

Conventionally, Patent Document 1 discloses a terminal device that can prevent image sticking mainly occurring in a display unit. In this terminal device, the display area of the display unit is divided into a plurality of parts, and the position of the clock display that is always displayed is changed according to the elapsed time, thereby preventing burn-in on the display unit.
JP 2003-223160 A

  Since a display unit using a self-luminous display element such as an organic EL display deteriorates according to the light emission time of the display element, the lifetime is determined according to the accumulated lighting time of the display unit. For this reason, since the usable period of a portable terminal device using an organic EL display as a display unit and the time of maintenance depend on the lifetime of the display unit, the accumulated lighting time of the display unit is grasped, and accordingly It is required to perform suitable control to prevent deterioration over time. Further, the terminal device shown in Patent Document 1 does not disclose any display control using the accumulated lighting time of the display unit.

  The present invention has been made in view of such circumstances, and an object of the present invention is to provide a portable terminal device that grasps the accumulated lighting time of the display unit and performs display control based on the accumulated lighting time.

  Another object of the present invention is to provide a portable terminal device that suitably controls display of an image displayed on a display unit and prevents image sticking.

  In order to solve the above-described problem, a mobile terminal device according to the present invention has a lighting state that lights at least at one or more different luminances, and the display unit that lights for a predetermined time in the lighting state; Measuring means for measuring a lighting time for lighting in a lighting state, lighting cumulative time storage means for cumulatively storing lighting times measured by the measuring means, and a lighting cumulative time threshold value of the display means, and holding the lighting A lighting time storage means for storing at least one lighting time of the lighting state of the display means determined according to a cumulative time threshold, a lighting cumulative time stored in the lighting cumulative time storage means, and the lighting time Comparison means for comparing the lighting cumulative time threshold value stored in the storage means, and lighting of at least one or more of the lighting states of the display means based on the comparison result of the comparison means During a characterized by comprising setting means for setting the lighting time determined in accordance with the lighting cumulative time threshold stored in the lighting time storage means.

  In addition, in order to solve the above-described problem, the mobile terminal device according to the present invention lights up with an input unit, a first lighting state that lights up with a predetermined luminance, and a luminance lower than the first lighting state, A second lighting state that transitions when the input means does not accept an input for a predetermined time when it is lit in the first lighting state, and is executed after the input is accepted by the input means Display means having at least an input processing display area for displaying an outline of processing, and when the display means is turned on in the second lighting state, the input processing display area is turned off or lower than the second lighting state. And display control means for lighting at a luminance.

  In addition, in order to solve the above-described problem, the mobile terminal device according to the present invention includes an input unit including an operation key to which a process according to an application being executed is assigned, and a plurality of processes assigned to the operation key. A storage means for storing identification information of a predetermined process, a display means having an input process display area for displaying information representing a process assigned to the operation key, and an operation via the input means. When the process assigned to the operation key coincides with the process identified by the identification information stored in the storage means, and then a predetermined time has passed without an operation being input through the input means, And display control means for changing a display state of information representing the process assigned to the operation key in the input process display area.

  The portable terminal device according to the present invention can suitably control the lighting time of the display unit and reduce aging degradation.

  An embodiment of a portable terminal device according to the present invention will be described with reference to the accompanying drawings.

  FIG. 1 shows an external configuration of a mobile phone 1 applicable as a mobile terminal device according to the present invention. 1A shows a configuration of an external appearance when the mobile phone 1 is opened at about 180 degrees, and FIG. 1B is a side view when the mobile phone 1 is opened. It shows the structure of the appearance.

  As shown in FIGS. 1A and 1B, the mobile phone 1 has a first housing 12 and a second housing 13 that are hinge-coupled with a hinge 11 at the center as a boundary. It is formed so as to be foldable in the direction of the arrow X via the part 11. A transmitting / receiving antenna (antenna 31 in FIG. 3 to be described later) is provided at a predetermined position inside the mobile phone 1, and radio waves are transmitted to and from a base station (not shown) via the built-in antenna. Send and receive.

  The first casing 12 is provided with operation keys 14 such as numeric keys “0” to “9”, a calling key, a redial key, an end / power key, a clear key, and an e-mail key on the surface. Various instructions can be input using the operation keys 14.

  The first casing 12 is provided with a cross key and a confirmation key 14c at the top as the operation keys 14, and the user moves the cursor in the vertical and horizontal directions by operating the cross key in the vertical and horizontal directions, for example. Can do. Also, various functions can be confirmed by pressing the confirmation key 14c. The confirmation key 14c is an operation key that can change a process that is executed after receiving an input. The processing assigned to the confirmation key 14 c is displayed at the center of the key function display portion 17 a provided at the lower part of the main display 17.

  Further, the first housing 12 is provided with a first soft key 14a and a second soft key 14b on the upper part of the cross key and the enter key 14c, respectively. The first soft key 14a and the second soft key 14b are operation keys that can change processing executed after receiving an input. The process assigned to the first soft key 14 a is displayed on the right side of the key function display portion 17 a provided at the lower part of the main display 17. The process assigned to the second soft key 14b is displayed on the left side of the key function display portion 17a.

  A side key 16 for operating the mobile phone 1 is provided on the side surface of the first housing 12. A predetermined process is assigned to the side key 16 by being pressed toward the inside of the first housing 12.

  The first casing 12 is provided with a microphone 15 below the operation keys 14, and the microphone 15 collects the user's voice during a call.

  The first casing 12 has a battery pack (not shown) inserted on the back side. When the call end / power key is turned on, power is supplied from the battery pack to each circuit unit. Start in a possible state.

On the other hand, the second housing 13 is provided with a main display 17 as display means on the front surface thereof. In the present embodiment, the main display 17 is composed of an organic EL element. On the upper part of the main display 17, an icon display unit 17b, which is a display area for icons for notifying the reception state of the radio wave, the remaining battery level, and incoming mail, is provided. The display area provided in the central portion of the main display 17 includes a destination name registered as a telephone directory, a telephone number, a transmission history, etc., as well as the contents of an e-mail, a simple homepage, and a CCD (Charge Coupled Device) camera. (Image captured by CCD camera 20 in FIG. 2 described later)
A central display unit 17c is provided on which content received from an external content server (not shown) and content stored in a memory card (memory card 46 in FIG. 3 described later) are displayed. In addition, a key function display portion 17a as an input processing display area is provided at the bottom of the main display 17, and is assigned to the first soft key 14a, the second soft key 14b, and the enter key 14c according to the activated software. An overview of the given processing is displayed.

  The main display 17 has three lighting states: the first state is a normal lighting state, the second state is a low-light state in which the luminance is lower than that of the normal lighting state, and the third state constitutes the main display 17. The organic EL element to be turned off is not turned on. Details of the lighting state of the main display 17 will be described later.

  A speaker 18 is provided at a predetermined position on the upper part of the main display 17 so that the user can make a voice call.

  Magnetic sensors 19 a, 19 b, 19 c, and 19 d for detecting the open / closed state of the mobile phone 1 are provided at predetermined positions inside the first housing 12 and the second housing 13.

  FIG. 2 shows another external configuration of the mobile phone 1 that can be applied as the mobile terminal device according to the present invention. The state of the cellular phone 1 in FIG. 2 is a state in which the cellular phone 1 is rotated in the arrow X direction from the state of the cellular phone 1 in FIG. Note that FIG. 2A illustrates the configuration of the external appearance viewed from the front when the mobile phone 1 is closed, and FIG. 2B illustrates the external configuration viewed from the side when the mobile phone 1 is closed. Represents the configuration.

  A CCD camera 20 is provided on the upper part of the second casing 13, and thus a desired subject can be imaged. A sub-display 21 serving as a display means is provided below the CCD camera 20, and includes an antenna picture indicating the current sensitivity level of the antenna, a battery picture indicating the current remaining battery level of the mobile phone 1, and the current time. Etc. are displayed. Note that the sub-display 21 is also a display composed of organic EL elements, like the main display 17.

  FIG. 3 shows an internal configuration of the mobile phone 1 applicable to the information processing apparatus according to the present invention.

  A radio signal transmitted from a base station (not shown) is received by an antenna 31 and then input to a receiving circuit (RX) 33 via an antenna duplexer (DUP) 32. The receiving circuit 33 mixes the received radio signal with the local oscillation signal output from the frequency synthesizer (SYN) 34 and converts the frequency into an intermediate frequency signal (down-conversion). The receiving circuit 33 then orthogonally demodulates the down-converted intermediate frequency signal and outputs a received baseband signal. The frequency of the local oscillation signal generated from the frequency synthesizer 34 is instructed by a control signal SYC output from the control unit 41.

  The reception baseband signal from the reception circuit 33 is input to the CDMA signal processing unit 36.

The CDMA signal processing unit 36 includes a RAKE receiver (not shown). In this RAKE receiver, a plurality of paths included in the received baseband signal are despread with each spreading code (that is, the same spreading code as that of the spread received signal). Then, the signals of the respective paths subjected to the despreading process are subjected to coherent Rake synthesis after the phase is adjusted. The data sequence after Rake combining is subjected to deinterleaving and channel decoding (error correction decoding), and then binary data determination is performed. Thereby, received packet data of a predetermined transmission format is obtained. This received packet data is input to the compression / decompression processor 37.

  The compression / decompression processing unit 37 is configured by a DSP (Digital Signal Processor) or the like, and the received packet data output from the CDMA signal processing unit 36 is separated for each medium by a demultiplexing unit (not shown). Each is decrypted. For example, in the call mode, audio data corresponding to call voice included in the received packet data is decoded by a speech codec. Also, if the received packet data includes moving image data, such as the videophone mode, this moving image data is decoded by a video codec. Further, if the received packet data is a download content, the download content is decompressed, and then the decompressed download content is output to the control unit 41.

  The digital audio signal obtained by the decoding process is supplied to the PCM codec 38. The PCM codec 38 PCM-decodes the digital audio signal output from the compression / decompression processor 37 and outputs the analog audio data signal after PCM decoding to the reception amplifier 39. The analog audio signal is amplified by the reception amplifier 39 and then output from the speaker 18.

  The digital moving image signal decoded by the video codec by the compression / decompression processing unit 37 is input to the control unit 41. The control unit 41 displays a moving image based on the digital moving image signal output from the compression / decompression processing unit 37 on the main display 17 via a video RAM (for example, a VRAM) (not shown). The control unit 41 can display not only the received moving image data but also the moving image data captured by the CCD camera 20 on the main display 17 via a video RAM (not shown).

  Further, when the received packet data is an electronic mail, the compression / decompression processing unit 37 supplies the electronic mail to the control unit 41. The control unit 41 stores the electronic mail supplied from the compression / decompression processing unit 37 in the storage unit 42. Then, the control unit 41 reads out the electronic mail stored in the storage unit 42 in accordance with the operation of the operation key 14 as an input unit by the user, and displays the read electronic mail on the main display 17.

  On the other hand, in the call mode, the voice signal (analog audio signal) of the speaker (user) input to the microphone 15 is amplified to an appropriate level by the transmission amplifier 40 and then PCM encoded by the PCM codec 38. The digital audio signal after the PCM encoding is input to the compression / decompression processing unit 37. The moving image signal output from the CCD camera 20 is digitized by the control unit 41 and input to the compression / decompression processing unit 37. Further, an electronic mail which is text data created by the control unit 41 is also input to the compression / decompression processing unit 37.

  The compression / decompression processor 37 compresses and encodes the digital audio signal output from the PCM codec 38 in a format corresponding to a predetermined transmission data rate. Thereby, audio data is generated. The compression / decompression processing unit 37 compresses and encodes the digital moving image signal output from the control unit 41 to generate moving image data. Then, the compression / decompression processing unit 37 multiplexes these audio data and moving image data by a demultiplexing unit (not shown) according to a predetermined transmission format, and then packetizes them. Output to. Note that the compression / decompression processing unit 37 also multiplexes the e-mail into the transmission packet data even when the e-mail is output from the control unit 41.

  The CDMA signal processing unit 36 performs spread spectrum processing on the transmission packet data output from the compression / decompression processing unit 37 using a spreading code assigned to the transmission channel, and transmits the output signal after the spread spectrum processing to the transmission circuit ( TX) 35. The transmission circuit 35 modulates the signal after the spread spectrum processing using a digital modulation method such as a QPSK (Quadrature Phase Shift Keying) method. The transmission circuit 35 combines the digitally modulated transmission signal with a local oscillation signal generated from the frequency synthesizer 34 and frequency-converts (up-converts) the signal into a radio signal. Then, the transmission circuit 35 amplifies the radio signal generated by this up-conversion with high frequency so that the transmission power level instructed by the control unit 41 is obtained. The radio signal amplified by the high frequency is supplied to the antenna 31 via the antenna duplexer 32 and transmitted from the antenna 31 to a base station (not shown).

  The mobile phone 1 also includes an external memory interface 45. The external memory interface 45 has a slot into which the memory card 46 can be attached and detached. The memory card 46 is a type of flash memory card typified by a NAND flash memory card or a NOR flash memory card, and can write and read various data such as images, sounds and music via a 10-pin terminal. It has become. Further, the mobile phone 1 is provided with a clock circuit (timer) 47 for measuring the current accurate current time.

  The control unit 41 includes a central processing unit (CPU), a read only memory (ROM), and a random access memory (RAM). The CPU is loaded into the RAM from a program stored in the ROM or the storage unit 42. Various processes are executed in accordance with various application programs, and various control signals are generated and supplied to each unit to control the mobile phone 1 in an integrated manner. The RAM appropriately stores data necessary for the CPU to execute various processes.

  The storage unit 42 includes, for example, a flash memory element that is an electrically rewritable and erasable nonvolatile memory, an HDD (Hard Disc Drive), and the like, and various application programs executed by the CPU of the control unit 41 and various types The data group is stored.

  The power supply circuit 44 generates a predetermined operating power supply voltage Vcc based on the output of the battery 43 and supplies it to each circuit unit.

  FIG. 4 shows a functional configuration that can be executed by the control unit 41 of the mobile phone 1 shown in FIG.

  The lighting time measuring unit 50 is provided as a measuring unit, measures the time during which the main display 17 as the display unit is lit, and stores the lighting time cumulatively in the lighting cumulative time database (DB) 51. The lighting time measuring unit 50 measures the lighting time with reference to the current time measured by the clock circuit 47 provided in the mobile phone 1, for example, and acquires the difference between the lighting start time and the lighting end time as the lighting time. To do. A dedicated timer for measuring the lighting time may be provided.

  Here, the display state of the main display 17 includes three states of a normal lighting state, a low light state, and a light-off state. FIG. 5 is a diagram for explaining each state of the main display 17.

  FIG. 5A is a diagram illustrating a normal lighting state that is the first state. The main display 17 is normally lit when the mobile phone 1 transitions from a closed state to a spread state, or when any operation key 14 is pressed while the main display 17 is in an unlit state. Since the normal lighting state is assumed to be a state where the user is viewing the image displayed on the main display 17, it is the state with the highest luminance compared to other display states.

  FIG. 5B is a diagram showing a low light state that is the second state. The main display 17 shifts from the normal lighting state to the low light state when a predetermined time has elapsed without any operation in the normal lighting state. The low light state is assumed to be a state in which the user does not intend to operate the mobile phone 1 because a predetermined time has passed without the operation of the mobile phone 1, and is lit to reduce power consumption. However, the brightness is lower than that of the normal lighting state, and the display state is such that the displayed image cannot be accurately recognized.

  FIG. 5C is a diagram showing a light-off state that is the third state. The main display 17 transitions from the low light state to the off state when a predetermined time elapses without any operation in the low light state. The light-off state is a state in which the main display 17 is turned off in order to reduce power consumption, assuming that the user does not intend to operate the mobile phone 1 as in the case of the low light state.

  When the main display 17 is in the low light state and the extinguished state shown in FIGS. 5B and 5C, when any one of the operation keys 14 is pressed, the main display 17 changes to the normal lighting state shown in FIG. Transition.

  The lighting time measuring unit 50 measures the lighting time when the main display 17 is in the normal lighting state and the low light state. Moreover, the lighting time measuring unit 50 performs the lighting time measurement method in accordance with the lighting state. For example, when the main display 17 is in a normal lighting state, the measured actual lighting time is acquired as the lighting cumulative time. On the other hand, when the main display 17 is in the low light state, the amount of current is different from that in the normal lighting state. Therefore, in order to differentiate the deterioration over time based on the difference in current amount, for example, 50% of the actual lighting time is acquired as the lighting time, or the lighting time is proportional to the current amount in the normal lighting state and the low light state. Or get.

  Moreover, the timing which measures lighting time measures lighting time when the still image is displayed on the center display part 17c of the main display 17. FIG. Due to the characteristics of the organic EL element, the same image is deteriorated by being displayed at the same location, and there is a risk that image sticking will occur at the location on the main display 17. For this reason, the lighting time is measured when a still image that is more likely to deteriorate than a moving image is displayed.

The lighting accumulated time database (DB) 51 is provided as a lighting accumulated time storage means realized by the storage unit 42, for example, and the lighting time of the main display 17 measured and acquired by the lighting time measuring unit 50 is calculated as the accumulated lighting time hr _. As cumulative.

Lighting time database (DB) 52 is provided as a lighting time storage means for storing a lighting time setting table which is information related to the lighting time of each lighting state corresponding to the lighting cumulative time h _r of the main display 17. The lighting time setting table, each lighting time of each lighting state determined in order to reduce the aging due to light up the accumulated time h _r of the main display 17 is held. FIG. 6 is a diagram illustrating an example of a lighting time setting table.

In lighting time setting table, lighting time corresponding to the lighting cumulative time threshold h (Normal) t _a and the lighting time (low-lit) t _b are determined. These lighting times are times for maintaining each lighting state when no operation is performed in each lighting state. Each lighting time is determined with reference to the lighting cumulative time threshold h set, for example, a normal lighting state 15 seconds when the lighting cumulative time h _r is less than the lighting cumulative time threshold h _2, the low-lit state in 20 seconds Is done. Further, when the lighting cumulative time h _r is less than the lighting cumulative time threshold h ₂ or h ₃ is normally lighting state 13 seconds, low-lit state is set to 18 seconds.

In addition, the settable time range (normal) t _c and the settable time range (slight light) t _d are suitable for the normal lighting state and the low light state when the user arbitrarily sets the lighting time of the main display 17. The maximum value of each lighting time is determined. For example, if the lighting cumulative time h _r is less than the lighting cumulative time threshold h ₂ or h ₃ is normally lighting state within 18 seconds, the low-lit state is set within 22 seconds.

  In addition, each time shown by the lighting time setting table is an example, Comprising: It does not restrict to this.

Lighting accumulated time comparison unit 53 is provided as comparison means, the lighting cumulative time h _r of the main display 17, which is stored in the lighting cumulative time DB 51, the lighting cumulative time threshold corresponding to the lighting time setting table stored in the lighting time DB52 Compare with h. The accumulated lighting time comparison unit 53 outputs the comparison result to the lighting time setting unit 54. The comparison by the lighting cumulative time comparison unit 53 is performed at a timing such as when the main display 17 is in a normal lighting state or a light-off state.

  The lighting time setting unit 54 is provided as a setting unit, and sets each lighting time of the normal lighting state and the low light state of the main display 17 based on the comparison result output from the lighting cumulative time comparison unit 53. Specifically, the lighting time setting unit 54, based on the comparison result output from the lighting cumulative time comparison unit 53, each corresponding to the value of the lighting cumulative time threshold value h of the lighting time setting table stored in the lighting time DB 52. Read the lighting time and set based on the read lighting time.

In addition, the lighting time setting unit 54 can set each lighting time in the normal lighting state and the low light state to an arbitrary lighting time for which an input is received via the input unit 55 realized by the operation keys 14. At this time, the range of the lighting time in the normal lighting state that can be set is a settable time range (normal) t _c determined in correspondence with the lighting cumulative time threshold value h of the lighting time setting table stored in the lighting time DB 52. It is possible to set within the range. Similarly, the range of the lighting time of the low-lit conditions, can be set within the range of the lighting time setting lighting cumulative time threshold h to correspondingly settable time range defined in the table (the low-lit) t _d is there.

For example, the lighting cumulative time h _r is the case is less than the lighting cumulative time threshold h ₁ more h ₂ is the lighting time of the normal lighting state within 20 seconds, the lighting time of the low-lit state is set within 25 seconds.

  The lighting state control unit 56 controls the lighting state of the main display 17 as the display unit 58 according to the lighting times of the normal lighting state and the low light state set by the lighting time setting unit 54.

  The key function display control unit 57 is provided as a display control unit, and controls the key function display unit 17 a according to the control of the lighting state of the main display 17 by the lighting state control unit 56.

The key function display control unit 57 functions when the lighting state of the main display 17 is the low light state shown in FIG.

  Here, unlike the normal lighting state of FIG. 5A, which is a state for visually recognizing the image displayed on the main display 17, the low light state is that a predetermined time has passed without any operation being performed. In this state, it can be assumed that the user does not intend to operate the mobile phone 1. For this reason, although it is lit to reduce power consumption, the luminance is lower than that in the normal lighting state, and the displayed image cannot be accurately visually recognized.

  That is, the mobile phone 1 rarely accepts an accurate operation on the image displayed on the main display 17 in the low light state. Therefore, there is almost no need to display the key function display unit 17a for displaying the processing assigned to the first soft key 14a, the second soft key 14b, and the confirmation key 14c provided in the main display 17. The display on the function display unit 17a may be turned off or turned on with a lower brightness than that in the low light state.

  FIG. 5D shows a display example of the main display 17 when the key function display control unit 57 performs display control of the key function display unit 17a and the display is turned off or turned on with a lower brightness than the low light state. FIG.

  The state in which the display of the key function display portion 17a is turned off is a state in which the organic EL elements constituting the main display 17 are not substantially energized and the organic EL elements are not substantially emitting light. Further, the state in which the display of the key function display unit 17a is turned on with a lower luminance than the low light state is a state in which the amount of current is smaller than that in the low light state. That is, when the display of the key function display unit 17a is turned off or turned on with a lower brightness than the low light state, the power consumption of the main display 17 can be reduced.

  In addition, due to the characteristics of the organic EL elements constituting the main display 17, when the same image is displayed at the same location for a long time, the organic EL device may be deteriorated and burn-in may occur at the location. Therefore, burn-in can be prevented by turning off the display of the key function display portion 17a which is almost unnecessary in the low light state or turning on the display with a lower luminance than in the low light state.

  From the above points, the key function display control unit 57 performs control so that when the main display 17 is in the low light state, the display of the key function display unit 17a is turned off or turned on with a lower brightness than the low light state. .

  Next, display control processing realized by the mobile phone 1 in the present embodiment will be described. This display control process is realized by a lighting time acquisition process, a lighting time control process, and a key function display control process.

  FIG. 7 is a flowchart for explaining the flow of the lighting time acquisition process. The lighting time acquisition process shown in FIG. 7 is performed by changing the method for measuring the lighting time when the main display 17 is in the normal lighting state shown in FIG. 5A and the low light state shown in FIG. Processing will be described.

  This lighting time acquisition process is started when a request for changing the main display 17 from the off state to the normal lighting state is generated. In other words, the lighting time acquisition process starts when the mobile phone 1 transitions from the closed state to the open state or when any operation key 14 is pressed when the display is in the unlit state shown in FIG. Is done.

  In step S1, the lighting time measuring unit 50 acquires the normal lighting start time. The normal lighting start time is acquired with reference to the current time measured by the clock circuit 47, for example.

  In step S <b> 2, the lighting time measuring unit 50 determines whether or not the main display 17 as the display unit 58 has transitioned to the low light state illustrated in FIG. The determination is made by acquiring the current lighting state of the main display 17 from the lighting state control unit 56. When the main display 17 is not in the low light state and is still in the normal lighting normal state, the lighting time measuring unit 50 waits for processing until the main display 17 transitions to the low light state.

  On the other hand, if it is determined that the main display 17 has transitioned to the low light state, the lighting time measurement unit 50 acquires the normal lighting end time in step S3. The normal lighting end time is acquired with reference to the current time measured by the clock circuit 47, for example. Moreover, the lighting time measuring unit 50 acquires the same time as the normal lighting end time as the low light start time.

  In step S4, the lighting time measuring unit 50 determines whether or not the main display 17 is in the low light state. The determination is made by acquiring the current lighting state of the main display 17 from the lighting state control unit 56. When the main display 17 is still in the low light state, the lighting time measuring unit 50 waits for processing until the main display 17 transitions to another state.

  If the main display 17 is not in the low light state in the extinction state determination step S4, in step S5, the lighting time measuring unit 50 determines whether or not the main display 17 has transitioned to the normal lighting state shown in FIG. Make a decision. The determination is made by acquiring the current lighting state of the main display 17 from the lighting state control unit 56. When the main display 17 is in the normal lighting state, the process returns to the normal lighting start time acquisition step S1, and the processes after step S1 are executed.

  On the other hand, when the main display 17 is not in the normal lighting state, the lighting state of the main display 17 is a state in which the lighting state transitions from the low light state to the extinguishing state shown in FIG. Gets the low light end time. The low lamp end time is obtained by referring to the current time measured by the clock circuit 47, for example.

  In step S7, the lighting time measuring unit 50 turns on the lighting from each time acquired in the normal lighting start time acquisition step S1, the normal lighting end time and the low lamp start time acquisition step S3, and the low lamp end time acquisition step S6. The lighting time after the time acquisition process is started is acquired. The lighting time measuring unit 50 performs the lighting time acquisition method in accordance with the normal lighting and the lighting state of the light lamp.

  The lighting time measurement unit 50 acquires the actual lighting time as the lighting time when the main display 17 is in the normal lighting state. That is, the time obtained from the difference between the times acquired in the normal lighting start time acquisition step S1 and the normal lighting end time acquisition step S3 is acquired as the lighting time in the normal lighting state.

  For example, when the main display 17 is in the low light state, the lighting time measuring unit 50 acquires 50% of the actual lighting time as the lighting time. That is, 50% of the lighting time of the actual low light state obtained from the difference between the times acquired in the low light start time acquisition step S3 and the low light end time acquisition step S6 is acquired as the lighting time.

In step S8, the lighting time measuring unit 50 stores the time obtained by adding the lighting times of the normal lighting state and the low lamp lighting state acquired in the lighting time acquisition step S7 in the lighting cumulative time DB 51 as the lighting time. Lighting time measuring unit 50, when there is already a stored lighting accumulated time h _r the lighting cumulative time DB51 are cumulatively added and stored in the lighting cumulative time h _r. Lighting cumulative time h _r, for example preferably it is stored on an hourly basis. This is the end of the lighting time acquisition process.

Incidentally, the lighting time measuring unit 50, when acquiring the lighting time based on the measurement result in the lighting time acquisition step S7, the normal lighting state and cumulatively lighting time to be added to the lighting accumulated time h _r in accordance with the low-lit state However, it may be obtained as the lighting time uniformly without making a difference between the normal lighting state and the low light state.

  Next, another lighting time acquisition process will be described. FIG. 8 is a flowchart for explaining the flow of another lighting time acquisition process. The lighting time acquisition process shown in FIG. 8 measures the lighting time when a still image is displayed on the central display portion 17c of the main display 17. By measuring the lighting time when a still image is displayed, deterioration is likely to occur compared to a moving image whose display is not fixed at the same location, and therefore, it is affected by aging deterioration of the organic EL element and the main display 17. is there.

  In addition, the case where the lighting time is measured without distinguishing both the normal lighting state shown in FIG. 5A and the low light state shown in FIG. 5B as the lighting state will be described.

  This lighting time acquisition process is started when a request for changing the main display 17 from the off state to the normal lighting state is generated. In other words, the lighting time acquisition process starts when the mobile phone 1 transitions from the closed state to the open state or when any operation key 14 is pressed when the display is in the unlit state shown in FIG. Is done.

  In step S11, the lighting time measuring unit 50 determines again whether or not the image displayed on the central display unit 17c of the main display 17 is a still image. Note that the determination in step S11 is not limited to determining whether or not the image displayed on the central display unit 17c is a still image, and is not limited to a predetermined region (in most regions of the display unit 17). It may be determined by whether or not a still image is displayed. The determination is preferably made based on the extension of the displayed content.

  In step S12, when the lighting time measuring unit 50 determines that the image displayed on the central display unit 17c of the main display 17 is not a still image but a moving image, the image displayed on the central display unit 17c. Wait until processing becomes a still image.

  On the other hand, when it is determined that the image displayed on the central display unit 17c is a still image, the lighting time measuring unit 50 acquires a still image display start time in step S12. The still image display start time is acquired with reference to the current time measured by the clock circuit 47, for example.

  In step S <b> 13, the lighting time measuring unit 50 determines whether the image displayed on the central display unit 17 c of the main display 17 as the display unit 58 is a still image.

When the image displayed on the central display unit 17c is a still image, the lighting time measuring unit 50 performs processing until the image displayed on the central display unit 17c becomes a moving image or the main display 17 is turned off. Wait.

  On the other hand, if the lighting time measuring unit 50 determines that the image displayed on the central display unit 17c is not a still image, the lighting time measuring unit 50 acquires the still image display end time in step S14. The still image display end time is obtained by referring to the current time measured by the clock circuit 47, for example.

  In step S15, the lighting time measuring unit 50 determines whether or not the main display 17 is in the off state. The determination is made by acquiring the current lighting state of the main display 17 from the lighting state control unit 56. When the main display 17 is in the normal lighting state or the low light state, the processing returns to the still image determination step S11 and the subsequent processing is repeated.

  In step S16, the lighting time measuring unit 50 acquires the lighting time after the lighting time acquisition process is started from each time acquired in the still image display start time acquisition step S12 and the still image end time acquisition step S14. To do.

In step S17, the lighting time measuring unit 50 stores the lighting time acquired in the lighting time acquiring step S16 in the lighting cumulative time DB 51. Lighting time measuring unit 50, when there is already a stored lighting accumulated time h _r the lighting cumulative time DB51 are cumulatively added and stored in the lighting cumulative time h _r. This is the end of the lighting time acquisition process.

The lighting time acquisition process shown in FIG. 8 measures the lighting time of the main display 17 according to the display time of the still image without considering the luminance difference between the lighting state of the normal lighting state and the lighted state. In combination with the lighting time acquisition process shown in FIG. 7, the lighting time measurement method is changed according to the difference in the brightness of the lighting state, and the still image is displayed on the central display portion 17c of the main display 17 for the time measured as the lighting time. by measuring the time, it may be used as the lighting cumulative time h _r.

  In the lighting time acquisition process shown in FIGS. 7 and 8, the lighting time acquired in the lighting time acquisition steps S7 and S16 is stored in the lighting cumulative time DB 51 every time the main display 17 is turned off. For example, it may be stored in a storage area where data can be temporarily stored, and may be performed at an arbitrary timing once a day. Since the number of times of saving in the lighting cumulative time DB 51 is reduced, it is possible to prevent the storage unit 42 constituting the lighting cumulative time DB 51 from being deteriorated and to reduce the amount of power consumed by the saving.

  Further, although the current time is acquired from the clock circuit 47 and the lighting start time and the lighting end time are acquired, a dedicated timer for measurement may be provided.

  Next, the lighting time control process among the display control processes realized by the mobile phone 1 in the present embodiment will be described. FIG. 9 is a flowchart for explaining the flow of the lighting time control process. This lighting time control process is started when a request for switching the main display 17 from the unlit state to the normal lit state occurs. That is, the lighting time control process is started when the mobile phone 1 transitions from the closed state to the opened state or when any operation key 14 is pressed when the display is in the extinguished state shown in FIG. Is done.

In step S21, the lighting accumulated time comparison section 53 acquires the lighting cumulative time _{h r} of the main display 17 that is stored in the lighting cumulative time DB 51.

In step S22, the lighting accumulated time comparing unit 53, a lighting accumulated time h _r obtained in the lighting accumulated time acquisition step S21, the lighting accumulated time threshold h lighting time setting table shown in FIG. 6 which is stored in the lighting time DB52 Compare with. For example, a lighting accumulated time h _r is now less than h ₁ or h _2, if the display lighting time of the main display 17 is set to the setting 1, lighting accumulated time acquired in the lighting accumulated time acquisition step S21 h _r Is compared with the lighting cumulative time threshold h ₂ or more (lighting cumulative time threshold h ₂ <lighting cumulative time h _r ).

In step S23, the lighting time setting unit 54, when the lighting cumulative time h _r was the lighting cumulative time threshold h or higher, and sets the lighting time of each lighting state. For example, when the lighting cumulative time h _r when the lighting time is set to the setting 1 of the main display 17 was turned cumulative time threshold h ₂ above, the lighting time setting unit 54, automatically lighting time setting table The setting to change to each lighting time of set value 2 is performed. Specifically, a setting is made to change the lighting time in the normal lighting state to 13 seconds and the lighting time in the low light state to 18 seconds. On the other hand, if the lighting cumulative time h _r has not reached the lighting cumulative time threshold h, the lighting time setting unit 54, without performing setting change of the lighting time from a conventional set value, the process proceeds to the lighting state control step S24 .

  In step S <b> 24, the lighting state control unit 56 sets the main display 17 as the display unit to the normal lighting state based on the lighting time of the normal lighting state set by the lighting time setting unit 54. In addition, when the set lighting time in the normal lighting state has elapsed without any operation being input to the mobile phone 1, the lighting state control unit 56 performs control to change the lighting state of the main display 17 to the low light state. . Further, when the set lighting time has elapsed without any operation being input to the mobile phone 1, the lighting state control unit 56 performs control to shift the lighting state of the main display 17 to the extinguishing state.

  This is the end of the description of the lighting time control process.

  The lighting time control process is started when a request for switching the main display 17 from the unlit state to the normal lit state is generated, but may be started at a timing when the main display 17 is turned off.

  Next, the key function display control process performed after the lighting time control process is executed and the main display 17 is in the low light state in the lighting state control step S24 will be described. FIG. 10 is a flowchart for explaining the flow of the key function display control process.

  In step S <b> 31, the key function display control unit 57 acquires the current lighting state from the lighting state control unit 56 that controls the lighting state of the main display 17, and determines whether or not it is in the low light state. When the main display 17 is not in the low light state, the key function display control unit 57 waits for processing until the main display 17 is in the low light state.

  On the other hand, when the main display 17 is in the low light state, in step S32, the key function display control unit 57 turns off the display of the key function display unit 17a as shown in FIG. Lights up with brightness.

  In step S33, the key function display control unit 57 acquires the current lighting state from the lighting state control unit 56 that controls the lighting state of the main display 17, and the display state of the main display 17 is changed from the low light state to the off state. It is determined whether or not a transition has occurred. If the main display 17 is off, the key function display control process ends.

  On the other hand, if the lighting state of the main display 17 is not the extinguishing state, in step S34, the key function display control unit 57 acquires the lighting state of the main display 17 from the lighting state control unit 56, and the lighting state of the main display 17 is reached. It is determined whether or not has transitioned to the normal lighting state. If the main display 17 is not in the normal lighting state, the key function display control process ends.

  When the main display 17 is in the normal lighting state, in step S35, the key function display control unit 57 displays the key function display unit 17a with the luminance corresponding to the normal lighting state similar to the area of the other main display 17. indicate. Thereafter, the process returns to the low light state determination step S31, and the key function display control unit 57 repeats the processes after step S31. This is the end of the description of the key function display control process.

  Note that the key function display control unit 57 performs display control of the key function display unit 17a when it is in the low light state according to the lighting state, but controls the key function display unit 17a according to the lighting time. Also good. For example, when the normal lighting state continues for 10 seconds or more, the display of the key function display unit 17a may be controlled to be turned off or light with a lower brightness than the low light state.

  Further, the key function display control process is performed in combination with the lighting time acquisition process and the lighting time control process, but only the key function display control process may be executed individually.

  For example, if a character string or symbol representing a predetermined function is displayed on the key function display unit 17a for a predetermined time after the last input operation via the input unit 55 is detected, display of the character string or symbol is displayed. You may control to light-off a location. That is, the display control of the key function display unit 17a may not be performed at the same time when the light is turned on. Furthermore, only a part of the character string or symbol displayed on the key function display unit 17a may be turned off.

  As a result, it is possible to set only the functions that are frequently assigned to the first soft key 14a and the second soft key 14b to the off state and not to turn off the display of functions that are not familiar to the user. It is possible to prevent the key function display portion 17a from being burned onto the main display 17 while preventing the occurrence of the above.

  In this way, when only turning on / off a predetermined character string or symbol is controlled, the character string or symbol to be turned off is stored in advance. For example, among the functions assigned to the first soft key 14a, the second soft key 14b, and the confirmation key 14c displayed on the key function display unit 17a, a character string or a symbol to be turned off is stored in advance. As an example, FIG. 11 shows character strings and symbols of functions to be turned off among the functions assigned to the first soft key 14a and the second soft key 14b. . Here, description will be made assuming that character strings and symbols are stored as objects to be turned off, but any label that can identify the functions assigned to the first soft key 14a, the second soft key 14b, and the confirm key 14c may be used. It is not necessary to memorize | store in the form of the character string and symbol which are displayed on the key function display part 17a. These functions to be turned off may be set by the user, or may be automatically changed according to the history such as the number of times the function is used by the user and the time when the function is used.

  FIG. 12 is a flowchart showing processing of the control unit 41 that displays characters and images on the main display 17 when an operation input via the input unit 55 is detected. When the control unit 41 detects an input operation via the input unit 55 (S51), a predetermined image or character string is displayed on the central display unit 17c and the key function display unit 17a of the main display 17 (S52). At this time, the lighting state of the main display 17 is controlled by the lighting state control unit 56. Then, the key function display control unit 57 if the function to be turned off displayed on the key function display unit 17a with a character string or a symbol matches the function stored in advance as the turn-off target (Yes in S53). The timer is set (S54).

  In this timer, a predetermined time (for example, 10 seconds) until a predetermined character string or symbol displayed on the key function display unit 17a is turned off is set. When the control unit 41 detects an input operation via the input unit 55 with the timer set as described above, the process of FIG. 12 is executed again, and the character string or symbol displayed on the key function display unit 17a is displayed. If the character string or symbol set as the light-off target matches, the timer is reset and the time is measured from the initial value. Thereby, it is possible to determine whether or not a predetermined time has elapsed since the operation last input by the input unit 55.

  Whether the timer has expired is periodically monitored by the control unit 41. If the control unit 41 periodically monitors the timer and determines that this timer has expired, the character string or symbol to be turned off is turned off.

  An example of the off state of the key function display unit 17a will be described with reference to FIG. FIG. 13A is an example of a display screen displayed on the main display 17 when the key function display portion 17a is in a lighting state. On the other hand, the key function display portion 17a being in the light-off state may be a state in which nothing is displayed in the display region of the character string or symbol to be turned off as shown in FIG. The character string or symbol to be turned off may be erased as shown in FIG. 13B, and the frame or background of the display area of the character string or symbol may be displayed, or the character to be turned off as shown in FIG. The image of the central display portion 17c may be enlarged and displayed up to the area of the key function display portion 17a by deleting the columns and symbols and the frame and background of the display region.

  When any key operation is input from the input unit 55 after the character string or symbol to be turned off is turned off, the character string or symbol is turned on again.

  In the above description, the character string or symbol to be turned off is turned off. However, when the timer expires, only the display area of the character string or symbol to be turned off on the key function display unit 17a has lower brightness than the normal lighting state. It may be turned on in a state, may be turned on in a state where the brightness is lower than that in the lighted state, or a character string or symbol to be turned off may be scrolled in the display area as shown in FIG. The scrolling of the character string or symbol in the display area displays not only the character string or symbol to be turned off but also a long character string that does not fit in the display area of the key function display unit 17a in the display area. You may use for.

  According to the cellular phone 1, since the optimum lighting time for each lighting state is automatically set according to the lighting time of the main display 17, the deterioration over time of the main display 17 composed of organic EL elements is reduced. Accordingly, the usable period of the main display 17 can be extended.

  In addition, since the lighting time is automatically set according to the cumulative lighting time of the main display 17, the usable period of the mobile phone 1 can be extended without performing a troublesome operation for the user.

  Further, the lighting time to be added to the cumulative lighting time is measured when the main display 17 is in a lighting state and a still image is being displayed. It is also possible to prevent the main display 17 from being seized with the aging of the organic EL element.

  Furthermore, in the low light state where the necessity of visually recognizing the main display 17 and the state where no key operation has been performed for a certain period of time, the display of the key function display portion 17a which is almost unnecessary is turned off or in a light state. Since control is performed so that the light is lit at a low luminance, it is possible to prevent deterioration of the organic EL element due to the fixed display at the same place for a long time, and to avoid burn-in on the main display 17.

  In the present embodiment, the example in which the main display 17 is composed of organic EL elements has been described. Good. Further, the display unit 58 has been described as applied to the main display 17, but can be applied to the sub display 21 in the same manner.

  Furthermore, the lighting state of the main display 17 has been described by applying an example in which three levels of lighting states having different luminances of a normal lighting state, a low light state, and a lighting state are provided. It is also possible to provide lighting states at different levels of brightness.

The figure which shows the structure of the external appearance of the mobile telephone applicable to the portable terminal device which concerns on this invention. The figure which shows the structure of the other external appearance of the mobile telephone applicable to the portable terminal device which concerns on this invention. The block diagram which shows the internal structure of the mobile telephone applicable to the portable terminal device which concerns on this invention. The block diagram which shows the functional structure which can be performed by the control part of FIG. It is a figure explaining the dot etc. state of a main display, (A) is a figure which shows a normal lighting state, (B) is a figure which shows a faint lighting state, (C) is a figure which shows a light extinction state, (D) is a key The figure which shows the state which the function display part lighted with the brightness | luminance lower than a light extinction or a light state. The figure which shows an example of the lighting time setting table stored in point equal time DB. The flowchart explaining the flow of the lighting time acquisition process in this embodiment. The flowchart explaining the flow of the other lighting time acquisition process in this embodiment. The flowchart explaining the flow of the lighting time control process in this embodiment. The flowchart explaining the flow of the key function display control processing in this embodiment. The figure which shows the character string or symbol of the light extinction object in this embodiment. The flowchart which shows the process of the control part when displaying a character and an image on a main display when the operation input via the input part in this embodiment is detected. The figure which shows the example of the light extinction state of the key function display part in this embodiment. The figure which shows the state which scrolls the character string of the light extinction object in this embodiment.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Mobile phone 14 Operation key 14a 1st soft key 14b 2nd soft key 14c Confirmation key 17 Main display 17a Key function display part 20 CCD camera 41 Control part 42 Storage part 50 Lighting time measurement part 51 Lighting accumulation time database (DB)
52 Lighting time database (DB)
53 lighting cumulative time comparison unit 54 lighting time setting unit 55 input unit 56 lighting state control unit 57 key function display control unit 58 display unit

Claims (14)

Display means for lighting at a predetermined brightness of at least one or more, and lighting for a predetermined time in the lighting state;
Measuring means for measuring a lighting time during which the display means is lit in the lighting state;
A lighting cumulative time storage means for cumulatively storing lighting times measured by the measuring means; and a lighting cumulative time threshold value of the display means, and at least the display means determined according to the lighting cumulative time threshold value Lighting time storage means for storing lighting times of one or more of the lighting states;
Comparison means for comparing the accumulated lighting time stored in the accumulated lighting time storage means with the accumulated lighting time threshold stored in the lighting time storage means;
Based on the comparison result of the comparison means, the lighting time of at least one of the lighting states of the display means is set to a lighting time determined according to the lighting cumulative time threshold value stored in the lighting time storage means. A portable terminal device comprising setting means. 2. The portable terminal device according to claim 1, wherein the measuring unit changes a lighting time measuring method stored in the lighting accumulated time storage unit according to a luminance of a lighting state of the display unit. 2. The portable terminal device according to claim 1, wherein the measuring unit measures a time during which the display unit is lit in the lighting state and a still image is displayed as a lighting time. The lighting time storage means stores a settable range of the lighting time of at least one of the lighting states of the display means determined according to the lighting cumulative time threshold,
2. The portable terminal device according to claim 1, wherein the setting means can set the lighting time in the lighting state within the settable range stored in the lighting time storage means. The display means includes a first lighting state that lights at a predetermined luminance;
The mobile terminal device according to claim 1, further comprising: a second lighting state in which the lighting is performed with a lower luminance than the first lighting state. When the display unit is turned on in the second lighting state, at least a part of a display image displayed on the display unit is turned off or turned on with a lower luminance than the second lighting state. Item 6. The mobile terminal device according to Item 5. Input means;
A first lighting state that lights at a predetermined luminance, and a case where the input means does not accept an input for a predetermined time when the light is turned on at a lower luminance than the first lighting state and the light is turned on in the first lighting state. Display means having at least an input processing display area for displaying an outline of processing executed after receiving an input by the input means, and wherein the display means has the second lighting state transitioning to And a display control means for turning off the input processing display area or turning it on at a lower brightness than that of the second lighting state. The input means has at least an operation key that can change a process executed after receiving an input;
8. The portable terminal device according to claim 7, wherein an outline of processing executed after receiving an input by the operation key is displayed in the input processing display area of the display means. When the display control means receives an input from the input means when the input processing display area is turned off or is lit at a lower brightness than the second lighting state,
The portable terminal device according to claim 7, wherein the display unit including the input processing display area is changed to the first lighting state. The portable terminal device according to claim 1, wherein the display unit is configured by an organic EL element. An input means including an operation key to which processing according to the application being executed is assigned;
Storage means for storing identification information of a predetermined process among a plurality of processes assigned to the operation key;
Display means having an input process display area for displaying information representing the process assigned to the operation key;
The process assigned to the operation key when an operation through the input unit is input matches the process identified by the identification information stored in the storage unit, and then the operation through the input unit is performed. A portable terminal device comprising: display control means for changing a display state of information representing a process assigned to the operation key in the input process display area when a predetermined time has passed without being input. .   12. The mobile phone according to claim 11, wherein the display state changed by the display control means is a state in which information representing the process assigned to the operation key in the input process display area is not displayed. Terminal device.   The state in which the display state has been changed by the display control means means that the display area of information representing the process assigned to the operation key in the input process display area has a lower luminance than the other display areas of the display means. The mobile terminal device according to claim 11, wherein the mobile terminal device is in a display state.   The state in which the display state is changed by the display control means is a state in which information representing the process assigned to the operation key in the input process display area is displayed so as to scroll the display area of the information. The portable terminal device according to claim 11.

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