JP2009109336A - Portable device and control method of the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a portable device for properly estimating an operation in which a user intentionally inclines it, and eliminating the other operation, or its control method. <P>SOLUTION: The portable device includes: LED 46a-46n; an acceleration sensor 45 for detecting an acceleration; and a CPU 49 for controlling a display aspect of the LED 46a-46n in response to an acceleration value detected by the acceleration sensor 45. The CPU 49 includes: an acceleration value integrating means for cumulatively integrating the acceleration values for a predetermined period; an integrated value determining means for determining whether the integrated value obtained by the acceleration value integrating means for the predetermined period exceeds a first threshold value for indicating a constant inclined state from a stationary state of the acceleration sensor 45 or not; and a display controlling means for controlling LED 46a-46n so as to present the predetermined display aspect if the integrated value determining means determines that the integrated value exceeds the first threshold value. <P>COPYRIGHT: (C)2009,JPO&amp;INPIT

Description

  The present invention relates to a portable electronic device incorporating an acceleration sensor and a control method.

  2. Description of the Related Art Conventionally, a portable electronic device such as a cellular phone has a built-in acceleration sensor for measuring a tilt angle of a main body, and a technique for performing control according to the tilt angle of the main body is known. In such portable electronic devices, the inclination angle of the main body is detected by an acceleration sensor, and this is used as an input to various applications, control programs, etc., and the light emitting element is controlled to emit light or the display image on the display is changed. Various controls and effects are possible.

  For example, Patent Document 1 proposes a mobile phone that turns on a backlight when a state that is not a predetermined reference angle is changed to a reference angle.

  Here, a three-axis acceleration sensor is used as the acceleration sensor, and a plurality of LEDs (Light Emitting Diodes) are provided at positions that are visually recognized from the outside of the casing of the mobile phone, according to the inclination angle of the casing detected by the acceleration sensor. When controlling the lighting position of the LED, for example, a method of determining the lighting position of the LED with a table corresponding to each inclination angle detected on each axis is considered (hereinafter referred to as the first method).

Similarly to the above case, a three-axis acceleration sensor is used as the acceleration sensor, and a plurality of LEDs are provided at positions that are visible from the outside of the mobile phone casing, and the lighting positions of the LEDs are sequentially changed from an arbitrary position to an adjacent position. When the LED lighting position moving speed is controlled according to the inclination angle of the casing detected by the acceleration sensor when moving, a threshold is provided for the detected inclination angle, and when the inclination angle is equal to or greater than the threshold, the LED If the lighting movement speed of the LED is the first speed and the tilt angle is less than the threshold, the LED lighting movement speed may be the second speed and the LED lighting movement speed corresponding to the tilt angle may be determined. The second method).
JP 2006-14056 A

  Here, as a specific example of the first method, FIG. 7 shows that the mobile phone 1 is provided at a position that is visible from the outside of the mobile phone when the mobile phone 1 is placed perpendicular to the horizontal plane and rotated clockwise. An example when the lighting position of LED moves according to the inclination angle of a mobile telephone by control of CPU is shown.

  The mobile phone 100 is provided with LEDs 102 a to 102 n along the outer periphery of the display unit side body 101 on the back side of the display unit.

  FIG. 7A shows the lighting positions of the LEDs 102a to 102n when the cellular phone 100 is rotated clockwise from the state where the cellular phone 100 is placed perpendicular to the horizontal plane. The LED lighting position is determined by referring to the LED lighting position table with respect to the inclination angle shown in FIG. 8 to be described later, and the lighting position corresponding to each acceleration of the X axis and Y axis detected by the acceleration sensor is determined. The lighting position of the central LED is the LED 102a, and the lighting positions of the LEDs are determined as the LED 102a, the LED 102b, and the LED 102n.

  Next, FIG.7 (b) has shown the lighting position of LED when the mobile telephone 100 inclines a little from the stationary state of Fig.7 (a). For the LED lighting position at this time, referring to the LED lighting position table with respect to the inclination angle shown in FIG. 8 described later, the central LED lighting position is LED 102b, and the LED lighting positions are LED 102a, LED 102b, and LED 102c. It is determined. Next, FIG.7 (c) has shown the lighting position of LED when the mobile telephone 100 further inclines from the inclination state of FIG.7 (b). For the LED lighting position at this time, referring to the LED lighting position table with respect to the tilt angle shown in FIG. 8 described later, the central LED lighting position is LED 102c, and the LED lighting positions are LED 102b, LED 102c, and LED 102d. It is determined.

  FIG. 8 is an example of a table that determines the lighting position of the LED corresponding to the tilt angle of the mobile phone 100. Using this table, the X-axis direction and Y-axis direction inclination angles are determined from the X-axis direction and Y-axis direction acceleration values detected by the acceleration sensor, and the LEDs shown in FIG. 7 corresponding to these inclination angles. And the lighting position of the central LED are determined.

  Thus, the lighting position of the LED can be determined by referring to the table corresponding to the inclination angles of the X axis, the Y axis, and the Z axis detected by the acceleration sensor.

  However, in the first method, when the lighting position of the LED is determined, if the method of simply determining the lighting position of the LED based on the tilt angle of the casing with reference to the table is employed, the tilt of the casing When the angle is a certain angle (the angle at which the LED is lit is on the boundary line from the arbitrary lit position to the next lit position), the LED The lighting position may move. For example, although the user has not intentionally changed the tilt angle of the housing, the lighting position of the LED may change, which may cause the user to feel uncomfortable.

  Next, as a specific example of the second method, when the lighting position of the LED provided at the position visually recognized from the outside of the mobile phone sequentially moves from an arbitrary position to an adjacent position under the control of the CPU, as shown in FIG. An example is shown.

  Similarly to FIG. 7, the mobile phone 1 is provided with LEDs 102 a to 102 n on the outer peripheral portion on the back side of the display unit of the display unit side body 3.

  In the LEDs 102a to 102n, first, the LED 102a is lit in a dark color (FIG. 9A). Next, the dark color lighting position moves from the LED 102a to the LED 102b, and the LED 102a lights in a light color (FIG. 9B). Further, the lighting of the dark color moves from the LED 102b to the LED 102c, the LED 102b lights up in a light color, and the LED 102a lights up in a lighter color than the lighted up in FIG. 9B (FIG. 9C). In this way, the lighting position of the LED is sequentially moved from an arbitrary position to an adjacent position, and the movement speed of the lighting position of the LED is controlled according to the inclination angle of the mobile phone 1 detected by the acceleration sensor.

  As a specific example of the second method, an example of a method of controlling the lighting position moving speed of the LED corresponding to the tilt angle will be described with reference to FIGS. 10 and 11.

  In FIG. 10A, the cellular phone 100 is placed on a horizontal plane in a folded state and is in a stationary state, and thus the lighting position of the LED does not move. Next, when the tilt angle in the vertical direction is detected, the lighting position of the LED moves. Here, in FIGS. 10B to 10E in which the LED lighting position is moving, the magnitude of the LED lighting position moving speed is represented by the length of the arrow drawn on the side surface of the mobile phone 100. Yes. The LED lighting position moving speed increases in proportion to the inclination angle increasing (FIGS. 10B to 10D), and becomes maximum when the inclination angle reaches 90 ° (FIG. 10 ( e)).

  Further, in FIG. 11C, the cellular phone 100 is placed on a horizontal surface in a folded state and is in a stationary state, and thus the lighting position of the LED does not move. Next, when the leftward or rightward tilt angle is detected, the lighting position of the LED moves. The LED lighting position moving speed increases in proportion to the increase in the tilt angle (FIGS. 11B and 11D), and becomes maximum when the tilt angle reaches 90 ° (FIG. 11 ( a), (e)).

  Thus, in the second method, as shown in FIG. 12, a threshold value (θ = 45 ° in FIG. 12) is provided for the tilt angle detected by the acceleration sensor, and the tilt angle is equal to or greater than the threshold value (θ ≧ 45 °). In this case, the LED lighting position moving speed is V1, and when the tilt angle is less than the threshold (θ <45 °), the LED lighting position moving speed is V2, and the LED lighting position moving speed corresponding to the tilt angle is set. Can be determined.

  Further, in the second method, when the inclination angle from the stationary state is small, the minute inclination angle of the housing is determined as the stationary state as shown in a region P in FIG. Can be removed.

  However, when the inclination angle from the stationary state is large, as shown in the Q region of FIG. 13, if the minute inclination angle is determined as the stationary state, the inclination angle itself cannot be detected. It cannot be removed.

  Therefore, in the present invention, in order to solve the above-described problem, a portable electronic device and a portable electronic device that can appropriately estimate that the user has performed an intentional tilting operation and can exclude other operations. An object is to provide a control method.

  In order to solve the above problems, a portable electronic device according to the present invention controls display mode of the display unit according to an acceleration value detected by the display unit, an acceleration sensor that detects acceleration, and the acceleration sensor. A control means for performing, wherein the control means cumulatively integrates the acceleration values for each predetermined period, and an integrated value for a predetermined period by the acceleration value integration means Integrated value determination means for determining whether or not the acceleration sensor exceeds a first threshold value indicating a certain tilt state from a stationary state, and the integrated value by the integrated value determination means exceeds the first threshold value. Display control means for controlling the display means to perform display in a predetermined manner when it is determined that the display means is displayed.

  The integrated value determining means further comprises a determination control means for controlling the acceleration value integrating means according to the result determined by the integrated value determining means, wherein the integrated value determining means is configured such that the integrated value by the acceleration value integrating means is the first value. It is determined whether or not a second threshold value smaller than the second threshold value has been exceeded, and when it is determined that the second threshold value has been exceeded, the determination control means continues the integration by the acceleration value integration means. It is preferable to perform control so as to discard the integrated value and newly perform integration when it is determined that the second threshold value is not exceeded.

  Further, when the integrated value determining unit determines that the integrated value has exceeded the second threshold value, and the integrated value determining unit has determined that the integrated value after continuing the integration has exceeded the first threshold value. In this case, it is preferable to control the display unit to display in the predetermined manner.

  In addition, the integrated value determination means determines whether the integrated value is determined to have exceeded the second threshold and the integrated value after continuing the integration exceeds the second threshold. When it is determined that the value does not exceed the second threshold value, it is preferable to perform control so that the integrated value is discarded and new integration is performed.

  The acceleration sensor can detect an acceleration value in one direction and an acceleration value in the other direction opposite to the one direction, and the acceleration value integrating means can calculate the integrated value as the acceleration value in the one direction or the other direction. It is preferable to perform control so that integration is performed as the acceleration value.

  In addition, the acceleration sensor is a sensor that detects acceleration in two or three axis directions orthogonal to each other, and the acceleration value accumulating unit is configured to detect the acceleration for each predetermined period in each direction of the detection axis of the acceleration sensor. It is preferable that the acceleration value is cumulatively integrated, and the integrated value determination means controls to determine whether the integrated value exceeds the first threshold value within the predetermined period for each of the detection axes. .

  In addition, in order to solve the above problems, the control method according to the present invention includes an acceleration value integration step of cumulatively integrating acceleration values detected by the acceleration sensor at predetermined intervals, and a predetermined period of the acceleration value integration step. An integrated value determining step for determining whether or not the integrated value of the minute exceeds a first threshold value indicating a constant tilt state from a stationary state of the acceleration sensor, and the integrated value is determined by the integrated value determining step. A display control step of controlling the display means to perform display in a predetermined manner when it is determined that the threshold value has been exceeded.

  According to the portable electronic device and the method for controlling the portable electronic device according to the present invention, it is possible to appropriately estimate that the user has performed an intentional tilting operation and to eliminate other operations.

  Hereinafter, embodiments of the present invention will be described.

  FIG. 1 is an external perspective view of a mobile phone 1 which is an example of a mobile electronic device according to the present invention. FIG. 1 shows a so-called foldable mobile phone, but the mobile phone according to the present invention is not limited to this. For example, a sliding type in which one casing is slid in one direction from a state in which both casings are overlapped, or a rotary type in which one casing is rotated around an axis along the overlapping direction ( Turn type), or a type (straight type) in which the operation unit and the display unit are arranged in one housing and does not have a connecting unit.

  The mobile phone 1 includes an operation unit side body 2 and a display unit side body 3. The operation unit side body 2 includes an operation unit 11 and a microphone 12 into which a voice uttered by a user of the mobile phone 1 is input on the surface unit 10. The operation unit 11 includes a function setting operation button 13 for activating various functions such as various setting functions, a telephone book function, and a mail function, and an input operation button 14 for inputting numbers of telephone numbers, mail characters, and the like. , And a determination operation button 15 for performing determination and scrolling in various operations.

  The display unit side body 3 includes an LCD (Liquid Crystal Display) display unit 21 for displaying various types of information on the surface unit 20 and a speaker 22 for outputting the voice of the other party of the call. Has been.

  Further, the upper end portion of the operation unit side body 2 and the lower end portion of the display unit side body 3 are connected via a hinge mechanism 4. In addition, the mobile phone 1 relatively rotates the operation unit side body 2 and the display unit side body 3 which are connected via the hinge mechanism 4, so that the operation unit side body 2 and the display unit side body 3 are rotated. The body 3 can be in an open state (open state), or the operation unit side body 2 and the display unit side body 3 can be folded (folded state).

  FIG. 2 is a block diagram showing functions of the mobile phone 1. The cellular phone 1 includes an operation unit 11, a microphone 12, a main antenna 40, an RF (Radio Frequency) circuit unit 41, an LCD control unit 42, a sound processing unit 43, a memory 44, an acceleration sensor 45, LED (Light Emitting Diode) 46, power supply control circuit 47, vibration motor 48, CPU 49 (control means (acceleration value integrating means, integrated value determining means, display control means, determination control means)), and rechargeable battery 50 Are provided in the operation unit side body 2, and the LCD display unit 21, the speaker 22, and the driver IC 23 are provided in the display unit side body 3.

  In the present embodiment, the acceleration sensor 45 is used as the tilt sensor, and the tilt angle of the mobile phone 1 is calculated.

  The main antenna 40 communicates with an external device in a predetermined use frequency band (for example, 800 MHz). In the present embodiment, the predetermined use frequency band is 800 MHz, but other frequency bands may be used. Further, the main antenna 40 may have a so-called dual-band compatible configuration that can support other use frequency bands (for example, 2 GHz) in addition to a predetermined use frequency band.

  The RF circuit unit 41 demodulates the signal received by the main antenna 40, supplies the processed signal to the CPU 49, modulates the signal supplied from the CPU 49, and performs an external device (via the main antenna 40). To the base station). On the other hand, the CPU 49 is notified of the strength of the signal received by the main antenna 40.

  The LCD control unit 42 performs predetermined image processing according to the control of the CPU 49 and outputs the processed image data to the driver IC 23. The driver IC 23 stores the image data supplied from the LCD control unit 42 in the frame memory and outputs it to the LCD display unit 21 at a predetermined timing.

  The audio processing unit 43 performs predetermined audio processing on the signal supplied from the RF circuit unit 41 under the control of the CPU 49 and outputs the processed signal to the speaker 22. The speaker 22 outputs the signal supplied from the sound processing unit 43 to the outside.

  The audio processing unit 43 processes the signal input from the microphone 12 according to the control of the CPU 49 and outputs the processed signal to the RF circuit unit 41. The RF circuit unit 41 performs a predetermined process on the signal supplied from the sound processing unit 43 and outputs the processed signal to the main antenna 40.

  The memory 44 includes, for example, a working memory and is used for arithmetic processing by the CPU 49. Specifically, vibration pattern data to be described later can be stored. Note that the memory 44 may also serve as a removable external memory.

  The acceleration sensor 45 detects the acceleration given to the mobile phone 1 and outputs the detection result to the CPU 49. The acceleration sensor 45 is an example of a tilt detection unit.

  The acceleration sensor 45 is a three-axis (three-dimensional) type that detects acceleration in the X-axis direction, the Y-axis direction, and the Z-axis direction that are orthogonal to each other, and is based on externally applied force (F) and mass (m). Then, the acceleration (a) is measured (acceleration (a) = force (F) / mass (m)).

  Further, the acceleration sensor 45 measures the force applied to a predetermined mass by a piezoelectric element to obtain the acceleration for each axis, converts it into numerical data, and buffers it. Then, the CPU 49 reads the acceleration data periodically buffered. The acceleration sensor 45 is not limited to a piezoelectric element (piezoelectric type), but may be a MEMS (Micro Electro Mechanical Systems) type such as a piezoresistive type, a capacitance type, a thermal detection type, or a feedback coil by moving a movable coil. And a servo gauge type that measures strain caused by acceleration with a strain gauge, or the like.

  The LED 46 is configured to emit light based on the voltage supplied from the power supply control circuit unit 47. In FIG. 2, for the sake of simplicity, a single LED 46 is shown, but actually, it has a plurality of different LEDs as shown in FIG.

  The power supply control circuit unit 47 is connected to the rechargeable battery 50, converts the power supply voltage supplied from the rechargeable battery 50 into a predetermined power supply voltage, and supplies the converted power supply voltage to the LED 46 and the like. Of course, the power supply control circuit unit 47 supplies power to other electronic components and functional blocks.

  The CPU 49 controls the entire mobile phone 1, and in particular, performs predetermined control on the RF circuit unit 41, the LCD control unit 42, the sound processing unit 43, and a camera (not shown). In addition, the CPU 49 monitors the internal state such as the radio wave state of the main antenna 40 described above, the remaining amount of the rechargeable battery 50, missed calls and unread mails, and based on the results, the emission color of the LED 46 And control to change the display content of the LCD display unit 21 is also performed.

  Further, when a calling signal for the device itself is detected by the RF circuit unit 41 as a communication means, the LCD display unit 21, the LED 46, the vibration motor 48, and the speaker 22 are driven to notify the incoming call. When a response operation by the operation unit 11 occurs with respect to this incoming call, the RF circuit unit 41 is shifted to communication and a call.

  Here, operations of the acceleration sensor 45 and the CPU 49 will be described.

  The acceleration sensor 45 is supplied with a constant power supply voltage from the power supply control circuit 47, and periodically detects the change as acceleration data when the inclination of the mobile phone 1 changes. And CPU49 reads this. Further, the CPU 49 performs a predetermined calculation for obtaining the tilt angle for each of the three axes based on the read acceleration data, and grasps in which direction the mobile phone 1 is directed.

  The CPU 49 obtains the tilt angle of the mobile phone 1 based on the acceleration data detected by the acceleration sensor 45, and controls the effects by the LCD display unit 21 and the LED 46 based on the tilt angle. For example, when an incoming call is received, the lighting locations of the plurality of LEDs 46 are determined according to the inclination angle, or the display image is changed according to the inclination angle in an application such as a game.

  Here, as shown in FIG. 3, the acceleration sensor 45 mounted on the mobile phone 1 detects acceleration data in the three-axis directions of the X-axis direction, the Y-axis direction, and the Z-axis direction. Note that a biaxial acceleration sensor that uses two axes in the X-axis direction and the Y-axis direction orthogonal to each other as detection axes may be used instead of the three axes.

  Next, a method for controlling the LED 46 in accordance with the inclination angle of the mobile phone 1 detected by the acceleration sensor 45 will be described.

  FIG. 4 shows that when the mobile phone 1 is placed perpendicular to the horizontal plane and rotated clockwise, the lighting position of the LED 46 provided at a position visible from the outside of the mobile phone 1 is controlled by the CPU 49. An example when moving according to the inclination angle of the mobile phone 1 is shown.

  The mobile phone 1 is provided with LEDs 46 a to 46 n along the outer peripheral portion on the back side of the display unit of the display unit side body 3. In this embodiment, the LEDs 46a to 46n are provided on the back side of the display unit of the display unit side body 3, but the LEDs 46a to 46n may be provided on the back side of the operation unit of the operation unit side body 2. Other LEDs may be provided on both the operation unit back side of the operation unit side body 2 and the display unit back side of the display unit side body 3. Moreover, although LED is provided in 14 places, LED46a-46n, the number of LED is not restricted to this.

  FIG. 4 shows the lighting positions of the LEDs 46a to 46n when the cellular phone 1 is rotated clockwise from the state where the cellular phone 1 is placed perpendicular to the horizontal plane. In FIG. 4A, the mobile phone 1 is in a stationary state, the LED 46a, the LED 46b, and the LED 46n are lit, the central LED 46a is lit in a dark color, and the LED 46b and the LED 46n adjacent to the LED 46a are It is lit in a pale color.

  Next, FIG.4 (b) has shown the lighting position of LED when the mobile telephone 1 inclines a little from the stationary state of Fig.4 (a). Here, the LED 46a, the LED 46b, and the LED 46c are lit, the central LED 46b is lit in a dark color, and the LEDs 46a and 46c adjacent to the LED 46b are lit in a light color.

  Next, FIG.4 (c) has shown the lighting position of LED when the mobile telephone 1 further inclines from the inclination state of FIG.4 (b). Here, the LED 46b, the LED 46c, and the LED 46d are lit, the LED 46c at the center position is lit in a dark color, and the LED 46b and the LED 46d adjacent to the LED 46c are lit in a light color.

  In the mobile phone 1 according to the present invention, instead of making the inclination angle correspond to the LED lighting position or the LED lighting position moving speed with reference to the table, the acceleration is acquired every predetermined time, and this is cumulatively integrated. If the accumulated acceleration accumulated value exceeds a predetermined threshold value within a predetermined period, the LED lighting position is changed or the LED lighting position moving speed is changed. Further, in the mobile phone 1 according to the present invention, the control is performed by a method of discarding (resetting) the integrated value considering that it is a minute change if the set value is not exceeded within a predetermined period. According to this control method, regardless of the magnitude of the acceleration value, the minute inclination angle of the mobile phone 1 can be removed, and the LED lighting position or the LED lighting movement speed can be suitably changed. it can.

  FIG. 5 is a graph showing a specific example of a method of removing a minute inclination angle and a method of controlling the LED lighting position moving speed of the mobile phone 1 according to the present invention. For the sake of simplicity, FIG. 5 shows the acceleration detected by the acceleration sensor 45 in the X-axis direction, but actually the acceleration detected by the acceleration sensor 45 in the X-axis direction and the Y-axis direction is very small. The inclination angle is removed.

  First, the CPU 49 acquires the acceleration value in the X-axis direction detected by the acceleration sensor 45 for each period T. The acquired acceleration value is cumulatively accumulated by the CPU 49. In principle, the CPU 49 counts the period T for a predetermined period (for example, 3 periods, that is, 3T), discards the count value every predetermined period, and then repeats the operation for counting again for a predetermined period. .

  The measurement of the predetermined period is performed by the CPU 49 monitoring how many cycles T have elapsed. Specifically, the predetermined period has a count value 3 for 3T (3 periods), the count value is decreased by 1 every time one period T passes, and the count value becomes zero. The CPU 49 determines that a predetermined period has elapsed.

  Then, the CPU 49 determines whether or not the integrated value exceeds the first threshold value + H1 or −H1 until the predetermined period expires. When the CPU 49 determines that the integrated value exceeds the first threshold value + H1 or -H1, the CPU 49 controls the LED lighting position to move from the currently lit position to the next lit position or the immediately preceding lit position. At this time, the CPU 49 discards the accumulated value and also discards the count value, starts accumulating acceleration values again, and starts counting for a predetermined period (periods 6T to 9T and periods 17T to 19T in FIG. 5). .

  Further, the CPU 49 determines whether or not the integrated value exceeds a second threshold value + H2 that is smaller than the first threshold value + H1, or whether or not the integrated value exceeds a second threshold value −H2 that is larger than the first threshold value −H1. judge. If the CPU 49 determines that the second threshold value + H2 or -H2 is not exceeded, the CPU 49 discards the integrated value and also discards the count value, starts accumulating the acceleration value again, and starts counting for a predetermined period ( In FIG. 5, periods 0T to 3T and periods 3T to 6T).

  On the other hand, if it is determined that the integrated value exceeds + H2 or -H2, the integration is continued without discarding the integrated value, and the count is not discarded. Thereafter, the CPU 49 determines whether or not the integrated value exceeds + H1 or −H1 every time one cycle (1T) elapses. In addition, the CPU 49 determines whether or not the integrated value continuously exceeds + H2 or -H2.

  Further, even if it is determined that + H2 or -H2 has been exceeded once in this way and the integration is continued, if the integration value does not exceed + H1 or -H1 after a predetermined period of 3T has elapsed since the start of the continuation, the CPU 49 performs integration. The value is discarded and the count value is discarded. The integration is started again and the count is started again. When the CPU 49 determines that the integrated value does not exceed + H2 or -H2 (for example, the detected value in the reverse direction is integrated and the integrated value decreases while the integration is continued by determining that the integrated value has exceeded H2). At this time, the accumulated value is discarded, and the count value is discarded and a new accumulation is started.

  In the mobile phone 1 according to the present invention, by such a control method, it is determined that the accumulated value obtained by accumulating the acceleration value cumulatively exceeds the first threshold value + H1 or -H1 until the count value becomes zero. In such a case, it is determined that the inclination angle is not very small, and it is assumed that the user is intentionally moving the mobile phone 1, and the lighting position of the LED is the next lighting position or immediately before the current lighting position. Therefore, the user is not given a sense of incongruity.

  Further, in the mobile phone 1 according to the present invention, it is determined whether or not the change amount is minute based on a value obtained by cumulatively accumulating a plurality of acceleration values, so that the minute change amount can be captured more accurately and linearly. It is possible to change the LED lighting position or the LED lighting speed control in a smooth operation mode. On the other hand, when it is determined whether or not the inclination is minute by only one acceleration value, the minute change amount cannot be accurately captured linearly. Will change the lighting speed control.

  Furthermore, in the mobile phone 1 according to the present invention, when it is determined that the integrated value does not exceed the second threshold value + H2 or -H2, it is determined that the inclination angle is very small, and the user consciously uses the mobile phone. 1 is assumed not to be moved, and the integrated value is discarded, so that a minute inclination angle is removed regardless of the inclination angle of the mobile phone 1, and control is performed so that the lighting position of the LED does not fluctuate. be able to.

  In the mobile phone 1 according to the present invention, the CPU 49 determines that the first threshold value H1 is not exceeded, but discards the integrated value when it is determined that the second threshold value + H2 or -H2 is exceeded. Without continuing to integrate acceleration values, if it is determined that the integrated value has exceeded the first threshold value + H1 or -H1, the LED lighting position moves from the currently lit position to the next lit position. Thus, the LED lighting position can be changed or the LED lighting position speed can be changed with a smooth movement according to the inclination angle.

  FIG. 6 is a flowchart showing a flow of a method for removing a minute inclination angle of the mobile phone 1 and a method for determining the lighting position moving speed of the LED according to the present invention. 6 shows a flow corresponding to the inclination angle only in the X-axis direction for the sake of simplicity, actually, a flowchart corresponding to each inclination angle in the X-axis direction and the Y-axis direction is provided.

  First, in step S1, variables to be used are defined in advance and their initial values are set. The acceleration value in the X-axis direction is defined as x_acc, and since its initial value is 0, x_acc = 0 is set. Also, the counter is defined as x_count, and its initial value is a fixed value C, and x_count = C is set. Further, a threshold value (first threshold value + H1 and -H1 in FIG. 11) used for determining whether or not to move the lighting position of the LED is defined as g_thresh, an initial value thereof is set to 0x64, and g_thresh = 0x64 is set. Further, a threshold value (second threshold value + H2 and -H2 in FIG. 11) for determining whether or not the inclination angle of the mobile phone 1 is a minute inclination angle based on the integrated value of acceleration is defined as g_chata, and its initial value Is set to 0x15 and g_chata = 0x15 is set. Further, gx_acc is defined as a variable for storing the integrated value of acceleration, the initial value is set to 0, and gx_acc = 0 is set. Also, g_count is defined as a variable for comparing the counter values, the initial value is set to 0, and g_count = 0 is set. Note that the values set in the threshold values g_thresh and g_chat in this embodiment are examples, and the present invention is not limited to these values.

  Next, in step S <b> 2, the CPU 49 acquires an acceleration value x_acc detected by the acceleration sensor 45 for each period T.

  In step S3, the CPU 49 determines whether or not the acceleration value x_acc is a value indicating a negative direction. This is because the acceleration value x_acc detected by the acceleration sensor 45 of the present embodiment is expressed by a hexadecimal positive value as shown in FIG. 5 regardless of whether the acceleration value is positive or negative. It is. If this determination is YES, the acceleration value x_acc is a value indicating a negative direction, and the process proceeds to step S4. On the other hand, when this determination is No, the acceleration value x_acc is a value indicating a positive direction, and the process proceeds to step S5. Here, in the present embodiment, one direction of the X axis is a positive direction, and the other direction of the X axis is a negative direction.

  In step S4, the CPU 49 substitutes gx_acc-x_acc for gx_acc. Thereby, x_acc can be handled as a negative value. In step S5, the CPU 49 substitutes gx_acc + x_acc for gx_acc. Thereby, x_acc can be handled as a positive value.

  In step S6, the CPU 49 subtracts 1 from the value of x_count and proceeds to step S7.

  In step S7, the CPU 49 determines whether or not the absolute value of gx_acc is larger than the value of g_thresh. If this determination is YES, the process proceeds to step S8. On the other hand, if this determination is No, the process proceeds to step S10.

  In step S8, the CPU 49 changes the lighting position of the LED from the current lighting position to the next lighting position or the previous lighting position, and proceeds to step S9.

  In step S9, the CPU 49 discards the value of x_count, sets it again to a fixed value C (for example, 3), and returns to step S2.

  In step S10, the CPU 49 determines whether or not the value of x_count is zero. If this determination is YES, the process proceeds to step S11. On the other hand, when this determination is No, the integrated value is continuously discarded without being discarded, and the process returns to step S2.

  In step S11, the CPU 49 determines whether the value of gx_acc is smaller than g_chata. If this determination is YES, it is determined that the tilt angle is a minute angle, and the process proceeds to step S12. On the other hand, when this determination is No, it is determined that the inclination angle is not a minute angle, and the process proceeds to step S13. That is, since the process does not go through step S12, the integration is continued without discarding the integrated value gx_acc.

  In step S12, the CPU 49 assigns 0 to gx_acc. Thereby, the integrated value of acceleration is discarded, and a minute inclination angle can be removed.

  In step S13, the CPU 49 discards the value of x_count, sets it again to the fixed value C, and returns to step S2. That is, when gx_acc exceeds g_chata, the integration is continued for another period (C).

  Thus, according to the mobile phone 1 according to the present invention, it is possible to remove a minute inclination angle of the mobile phone 1 regardless of the magnitude of the acceleration value, and to change the LED lighting position or move the LED lighting position. The speed can be suitably changed.

  In addition, in this embodiment, although demonstrated using LED as a display means which performs a display in the aspect according to an acceleration value, it is not restricted to this. An LCD, an organic EL (Electro Luminescence), or the like may be used as display means for performing display in a mode corresponding to the acceleration value. In this case, not only lighting but also display content changing processing is performed.

  In the present embodiment, the CPU 49 performs integration using the acceleration value detected by the acceleration sensor 45, but is not limited thereto. Integration may be performed using the amount of change in acceleration instead of the acceleration value.

  As mentioned above, although embodiment of this invention was described, this invention is not restricted to embodiment mentioned above. The effects described in the embodiments of the present invention are only the most preferable effects resulting from the present invention, and the effects of the present invention are limited to those described in the embodiments of the present invention. is not.

It is a perspective view which shows the external appearance of the mobile telephone which concerns on this invention. It is a block diagram which shows the function of the mobile telephone which concerns on this invention. It is a figure which shows the triaxial direction of X, Y, Z of the acceleration sensor which concerns on this invention. It is a figure which shows the lighting position of LED which concerns on this invention. It is a graph which shows the removal method of the micro inclination angle of the mobile telephone which concerns on this invention, and the lighting position determination method of LED. It is a flowchart which shows the process of the removal method of the minute inclination angle of the mobile telephone which concerns on this invention, and the lighting position determination method of LED. It is a figure which shows a mode when the lighting position of LED of the conventional mobile telephone moves according to an inclination angle. It is a table which determines the lighting position of LED of the conventional mobile telephone. It is a figure which shows a mode when the lighting position of LED of the conventional mobile telephone moves to an adjacent position sequentially from arbitrary positions. It is a figure which shows the lighting position moving speed of LED when the conventional mobile telephone is made to incline up and down. It is a figure which shows the lighting position moving speed of LED when the conventional mobile telephone is inclined in the left-right direction. It is a figure which shows the table which determines the lighting position moving speed of LED according to the inclination-angle of the conventional mobile telephone. It is a graph which shows the control method according to the inclination-angle of the conventional mobile telephone.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Mobile phone 2 Operation part side housing | casing 3 Display part side housing | casing 11 Operation part 12 Microphone 21 LCD display part 22 Speaker 23 Driver IC
40 Main antenna 41 RF circuit unit 42 LCD control unit 43 Audio processing unit 44 Memory 45 Acceleration sensor 46a-46n LED
47 Power control circuit section 48 Vibration motor 49 CPU
50 rechargeable battery 100 mobile phone 101 display unit side housing 102a to 102n LED

Claims (7)

A portable electronic device comprising: a display unit; an acceleration sensor that detects acceleration; and a control unit that controls a display mode of the display unit according to an acceleration value detected by the acceleration sensor,
The control means includes
Acceleration value integration means for cumulatively integrating the acceleration values for each predetermined period;
Integrated value determination means for determining whether or not the integrated value for a predetermined period by the acceleration value integrating means exceeds a first threshold value indicating a constant tilt state from a stationary state of the acceleration sensor;
Display control means for controlling the display means to display in a predetermined manner when the integrated value is determined by the integrated value determining means to exceed the first threshold value. A portable electronic device characterized by In accordance with the result determined by the integrated value determining means, a determination control means for controlling the acceleration value integrating means,
The integrated value determining means determines whether or not the integrated value by the acceleration value integrating means has exceeded a second threshold value smaller than the first threshold value;
When it is determined that the second threshold value is exceeded, the determination control unit controls to continue the integration by the acceleration value integration unit, and when it is determined that the second threshold value is not exceeded. 2. The portable electronic device according to claim 1, wherein control is performed such that the integrated value is discarded and a new integration is performed.   The display control means, when the integrated value determining means determines that the integrated value exceeds the second threshold value, and determines that the integrated value after continuing the integration exceeds the first threshold value. The portable electronic device according to claim 2, wherein the display unit is controlled to display in the predetermined mode.   The integrated value determining means determines whether or not an integrated value exceeds the second threshold after the integrated value is determined to have exceeded the second threshold and the integration is continued. 4. The portable electronic device according to claim 2, wherein when it is determined that the second threshold value is not exceeded, control is performed such that the integrated value is discarded and new integration is performed. 5. The acceleration sensor can detect an acceleration value in one direction and an acceleration value in another direction opposite to the one direction,
5. The portable electronic device according to claim 4, wherein the acceleration value integrating means controls to integrate the integrated value as the acceleration value in the one direction or the acceleration value in the other direction. The acceleration sensor is a sensor that detects acceleration in two or three axes orthogonal to each other,
The acceleration value integration means cumulatively integrates the acceleration values for each predetermined period in each direction of the detection axis of the acceleration sensor,
6. The control unit according to claim 1, wherein the integrated value determination unit controls to determine whether the integrated value exceeds the first threshold value within the predetermined period for each of the detection axes. A portable electronic device according to claim 1. An acceleration value integrating step of cumulatively integrating the acceleration values detected by the acceleration sensor at predetermined intervals;
An integrated value determining step of determining whether or not an integrated value for a predetermined period by the acceleration value integrating step exceeds a first threshold value indicating a constant tilt state from a stationary state of the acceleration sensor;
A display control step of controlling the display means to perform display in a predetermined manner when the integrated value is determined to have exceeded the first threshold value by the integrated value determining step. To control portable electronic device.

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