JP5339440B2 - Portable POS device, power consumption control method and power consumption control program used for the portable POS device - Google Patents

Description

  The present invention relates to a portable point-of-sale (POS) terminal, a power consumption control method and a power consumption control program used for the portable POS device, and particularly in an environment in which retailing or physical distribution is performed, for example. A portable POS device that is suitable for application to a portable battery-operated battery such as a liquid crystal panel or a key switch, or a short-range communication unit, a power consumption control method used in the portable POS device, and The present invention relates to a power consumption control program.

  In a portable POS device used in an environment where retail or physical distribution is performed, it is important to extend the operation time by a battery, and power management (management) capable of finely controlling a device power supply is essential. In particular, it is effective for power saving to turn off a backlight such as a liquid crystal panel with high power consumption and a short-range communication unit in a range that does not hinder the operation. In order to save power of the apparatus, it is effective to reduce the brightness of the backlight. In this case, generally, the time when there is no input operation is measured, and when the set time elapses, the backlight is turned off. On the other hand, when an input operation using a touch panel or a button is detected, the backlight is turned on. Is done. However, if the user touches the touch panel by mistake, the touch panel is turned on, and when the user does not need to see the screen, for example, when reading a barcode, reading is confirmed by sound or vibration, and the user touches the screen. Even in a process that does not need to be viewed, the touch panel may be turned on, which is not sufficient for power saving.

  As this type of related technology, for example, there is a portable terminal device described in Patent Document 1. In this portable terminal device, the key contact detection means for detecting the contact of the human body is added to the key surface of the key input unit, so that when the operator's finger touches the key to press the key, the control unit In this case, the backlight is turned on by the key contact detection signal and the key input unit or the liquid crystal display unit is illuminated to prevent erroneous operation. This prevents erroneous operations such as entering the wrong key because the backlight is turned off and the key input unit cannot be identified even when the key is entered in a dark place, and the operator needs to prepare for conscious input. And not.

  Moreover, in the electronic device with an illumination light source described in Patent Document 2, information input from the input unit is processed by the control unit and displayed on the liquid crystal display unit. The liquid crystal display unit is illuminated by the illumination unit. The presence or absence of an input operation at the input unit is detected by the input operation detection unit. The time is counted by the timing unit. The luminance control unit controls the luminance of the illumination unit. In this case, if there is an input operation, the luminance controller gradually increases the luminance over a predetermined time, while if there is no input operation, the luminance gradually decreases. Thereby, while the illumination brightness of a liquid crystal display part changes without a sense of incongruity to a user, energy saving can be aimed at.

  Further, in the mobile phone described in Patent Document 3, when the state where the liquid crystal display unit is placed horizontally is set as the reference angle of the mobile phone, the mobile phone changes from a state other than horizontal to a horizontal state. When the reference angle is reached, the tilt sensor outputs an ON signal to the control unit. Similarly, when the mobile phone changes from a horizontal state to a non-horizontal state and is no longer at the reference angle, the tilt sensor outputs an off signal to the control unit. When the control unit detects that the tilt sensor has changed from the off state to the on state, the control unit turns on the backlight unit and illuminates the display surface of the liquid crystal display unit.

  Moreover, the portable terminal device described in Patent Document 4 has a power saving mode and a normal power mode in which normal power supply is performed, and includes an operating system and an application controlled by the operating system. . In this portable terminal device, an image is displayed on the display unit by the display control unit. While the application is running, the sensor detects the physical behavior of the mobile terminal device main body performed by the user of the mobile terminal device to view the screen of the display unit, and the power supply control unit based on the detection output of the sensor. Thus, the transition to the power saving mode or the return from the power saving mode is controlled. As a result, the power saving effect can be fully exhibited even during application startup, and erroneous operation can be eliminated when returning from the power saving mode.

JP 2001-094653 A Japanese Patent Laid-Open No. 2004-354736 JP 2006-014056 A JP 2007-080219 A

However, the related technology has the following problems.
That is, in the portable terminal device described in Patent Document 1, the operator does not need conscious input preparation, but it does not correspond to the case where the user touches the key by mistake, and the above problem is improved. Not.

  In the electronic device described in Patent Literature 2, although the luminance is gradually increased or the luminance is gradually decreased by the luminance control unit according to the presence / absence of an input operation, If the key is touched by mistake, it will not be dealt with and the above problems will not be improved.

  In the mobile phone described in Patent Document 3, the backlight is turned on by utilizing the movement intended by the operator to change the tilt of the mobile phone to improve the operability. Unlike the configuration, the above problems are not improved.

  The portable terminal device described in Patent Document 4 has a power saving effect even when the application is activated, but does not cope with a case where the user touches the key by an erroneous operation, and the above problem is not improved.

  The present invention has been made in view of the above circumstances, and a portable POS device that reduces power consumption even when a backlight or a short-range communication unit is mounted on a liquid crystal display unit, a key input unit, or the like. An object of the present invention is to provide a power consumption control method and a power consumption control program used for the portable POS device.

In order to solve the above-described problems, a first configuration of the present invention is a portable device including a liquid crystal display unit, a key input unit, and an illumination unit for illuminating the liquid crystal display unit and / or the key input unit. In accordance with the POS device, brightness adjustment means for adjusting the luminance of the illumination unit based on the attitude of the portable POS device and the usage frequency of the key input unit; and for each attitude of the portable POS device, the key input unit A usage frequency information management unit that manages a usage frequency within a certain period and a threshold value of the usage frequency of the key input unit, and the brightness adjustment unit partitions the posture of the portable POS device to partition each posture Luminance information storage means for preliminarily storing the luminance information of the illumination unit set every time, attitude measurement means for measuring the attitude of the portable POS device, and current of the portable POS apparatus measured by the attitude measurement means Control unit configured to read luminance information of the illumination unit corresponding to the posture from the luminance information storage unit and set the luminance of the illumination unit based on the read luminance information, and the control unit includes the use When the frequency of use of the key input unit managed by the frequency information management unit for each posture of the portable POS device exceeds a threshold of the usage frequency, the luminance information storage unit stores the information of the portable POS device. While increasing the luminance of the luminance information stored for each posture with a predetermined maximum value as an upper limit, and when lower than the threshold, control is performed to decrease the luminance with a predetermined minimum value as a lower limit Yes.

A second configuration of the present invention is a power consumption control used in a portable POS device having a liquid crystal display unit, a key input unit, and an illumination unit for illuminating the liquid crystal display unit and / or the key input unit. According to the method, the brightness adjustment unit adjusts the brightness of the illumination unit based on the attitude of the portable POS device and the use frequency of the key input unit, and the use frequency information management unit includes the portable POS. And a usage frequency information management process for managing a threshold value of a usage frequency of the key input unit and a usage frequency of the key input unit for each posture of the device. The information storage means partitions the posture of the portable POS device and stores in advance the luminance information of the illumination unit set for each posture section, and the posture measurement means includes the portable POS An attitude measurement process of measuring the attitude of the location, the control means reads the luminance information of the illumination unit corresponding to the current posture of has been the mobile POS device measured by the orientation measuring means from the luminance information storage means, reading The luminance of the illumination unit is set based on the luminance information, and the usage frequency within a certain period of the key input unit managed by the usage frequency information management unit for each posture of the portable POS device is the usage frequency. When the threshold value exceeds the threshold value, the luminance information stored in the luminance information storage means for each posture of the portable POS device is increased with a predetermined maximum value as an upper limit, while when smaller than the threshold value, And a control process for reducing the luminance with a predetermined minimum value as a lower limit .

  According to the configuration of the present invention, the luminance of the illumination unit can be adjusted based on the attitude of the portable POS device and the frequency of use of the key input unit, and power consumption can be reduced. Further, the power on / off state of the short-range communication unit can be controlled based on the attitude of the portable POS device, and power consumption can be reduced.

It is a block diagram which shows the structure of the principal part of the portable POS apparatus which is embodiment of this invention. It is a block diagram of the brightness | luminance information storage means and usage frequency information management means which show a part of structure of the memory 11 in FIG. It is a block diagram of the power supply information storage means which is a part of the structure of the memory 11 in FIG. 1 in FIG. 5 is a flowchart for explaining luminance adjustment processing by a central control unit 12; 5 is a flowchart for explaining power state control processing by a central control unit 12;

  The brightness adjusting unit partitions the posture of the portable POS device and measures the posture of the portable POS device, and a luminance information storage unit that stores in advance the luminance information of the illumination unit set for each posture of the posture. Luminance information of the illumination unit corresponding to the current posture of the portable POS device measured by the attitude measurement unit and the attitude measurement unit is read from the luminance information storage unit, and the luminance of the illumination unit based on the luminance information A portable POS device comprising a control means for setting the value is provided.

  Further, in a preferred embodiment of the present invention, usage frequency information management means for managing a usage frequency of the key input unit within a certain period and a threshold of the usage frequency of the key input unit set for each posture of the portable POS device. When the usage frequency of the key input unit managed by the usage frequency information management unit within a certain period exceeds the usage frequency threshold, the control unit is stored in the luminance information storage unit. The luminance corresponding to the luminance information is increased with a predetermined maximum value as an upper limit, and when the luminance is smaller than the threshold, the luminance is decreased with a predetermined minimum value as a lower limit. The posture measuring means is configured to measure the posture by detecting a change in speed of the portable POS device main body in the X-axis, Y-axis, and saddle axis directions orthogonal to each other.

The short-range communication unit is an IC card processing device that is wirelessly connected when a non-contact type IC card or an electronic device having a function equivalent to that of the non-contact type IC card approaches a predetermined area.
The power supply state control means partitions the posture of the mobile POS device and stores in advance power on / off state information of the short-range communication unit set for each posture section, A posture measuring unit that measures the posture of the portable POS device, and the power on / off state information corresponding to the current posture of the portable POS device measured by the posture measuring unit are read from the power information storage unit. Control means for controlling the on / off state of the power supply of the short-range communication unit based on the on / off state information.

Embodiment

FIG. 1 is a block diagram showing a configuration of a main part of a portable POS device according to an embodiment of the present invention.
As shown in the figure, the portable POS device 10 includes a memory 11, a central control unit 12, an acceleration sensor 13, a display control unit 14, an input control unit 15, a magnetic card reading unit 16, and a short distance. The communication unit 17 is configured. The acceleration sensor 13 measures the current posture by detecting changes (acceleration) in the X-axis, Y-axis, and heel axis directions of the portable POS device 10 that are orthogonal to each other. The display control unit 14 performs screen display on a liquid crystal display unit (not shown). In particular, in this embodiment, the display control unit 14 has an illumination unit (backlight BL) for illuminating the liquid crystal display unit.

  The input control unit 15 performs input processing by operating a touch panel and a key input unit (not shown). In particular, in this embodiment, the input control unit 15 includes an illumination unit (backlight BL) for illuminating the key input unit. Yes. The magnetic card reading unit 16 performs a magnetic card reading process. The short-range communication unit 17 is, for example, a non-contact type IC card or an electronic device having a function equivalent to that of the non-contact type IC card (for example, a mobile phone incorporating the non-contact type IC card) within a predetermined area. This is an IC card processing device that is wirelessly connected when approaching.

The memory 11 includes, for example, a ROM (Read Only Memory), a RAM (Random Access Memory), and the like. The business processing program P ₁ which is an application program for performing predetermined business processing corresponding to the portable POS device 10, the system In addition to having an OS (operating system) P ₂ that is a program for managing and a device driver P ₃ that is a program for controlling each device of the portable POS device 10, in particular, in this embodiment, the portable The POS device 10 has a function as a luminance information storage unit that partitions the posture (orientation) of the POS device 10 and stores in advance the luminance information of the illumination unit (backlight BL) set for each of the postures. In addition, the memory 11 functions as a power information storage unit that stores the power on / off state information of the short-range communication unit 17 in advance by partitioning the posture of the portable POS device 10 and setting the posture of each posture. Have.

The central control unit 12 is composed of a computer that controls the entire portable POS device 10 based on the business processing program P ₁ , OS (operating system) P ₂ , and device driver P _{3. In} particular, in this embodiment, Operates based on a power consumption control program. The central control unit 12 reads the luminance information of the illumination unit (backlight BL) corresponding to the current posture of the portable POS device 10 measured by the acceleration sensor 13 from the luminance information storage unit (memory 11). The brightness of the illuminating unit is set based on the brightness information. In this case, the central control unit 12 adjusts the luminance of the illumination unit (backlight BL) based on the attitude (orientation) of the portable POS device 10 and the frequency of use of the key input unit, for example, the portable POS device 10 The posture of the portable POS device 10 increases when it is used when the frequency of use of the key input unit is high (that is, it is adjusted so as to be bright), while the case of the mobile POS device 10 is used when the frequency of use of the key input unit is low Decrease (ie, adjust to darken).

  In addition, the central control unit 12 controls the power on / off state of the short-range communication unit 17 based on the attitude of the portable POS device 10, and in particular, in this embodiment, the central portable unit measured by the acceleration sensor 13. The power on / off state information corresponding to the current attitude of the POS device 10 is read from the power information storage means (memory 11), and the short distance communication unit 17 is turned on / off based on the on / off state information. Control off state. The portable POS device 10 operates using a battery (not shown) as a power source.

FIG. 2 is a schematic diagram showing a part of the configuration of the memory 11 in FIG. 1. FIG. 2A is a configuration diagram of luminance information storage means, and FIGS. 2B and 2C are usage frequency information. It is a block diagram of a management means.
As shown in FIG. 2A, the memory 11 has buffers 21, 22, and 23 that constitute luminance information storage means. In the buffer 21, the posture (orientation) of the portable POS device 10 is stored divided into tables T ₁ , T ₂ ,..., T ₂₅₆ , and in the buffer 22, each posture partition (table T ₁ , T ₂ ,. , T ₂₅₆ ), the luminance information of the illumination unit (backlight BL) set every time is stored. The buffer 23 stores an initial value of the brightness of the backlight.

  Further, as shown in FIG. 2B, the memory 11 has a buffer 24 that constitutes usage frequency information management means. The buffer 24 is composed of a ring buffer that stores the frequency of use of the key input unit within a certain period, and stores, for example, the number of input operations for seven days. Further, as shown in FIG. 2C, the memory 11 has a buffer 25 that constitutes a usage frequency information management unit. The buffer 25 manages a threshold value of the usage frequency of the key input unit set for each posture of the portable POS device 10, and stores, for example, a threshold value of a total input frequency for 7 days. In this case, the central control unit 12 determines that the frequency of use of the key input unit managed by the use frequency information management unit within a certain period exceeds the use frequency threshold set for each posture of the portable POS device 10. The luminance corresponding to the luminance information stored in the luminance information storage means is increased with a predetermined maximum value as an upper limit, and when the luminance is smaller than the threshold, the luminance is decreased with a predetermined minimum value as a lower limit. .

Figure 3 is a configuration diagram of a power supply information storage means which is part of the configuration of the memory 11 in FIG.
As shown in FIG. 3, the power source information storage means has buffers 31 and 32. In the buffer 31, as in the buffer 21 in FIG. 2, the posture (orientation) of the portable POS device 10 is partitioned and stored in tables T ₁ , T ₂ ,..., T ₂₅₆ . The power on / off state information (“ON” / “OFF”) of the short-range communication unit 17 set for each section (tables T ₁ , T ₂ ,..., T ₂₅₆ ) is stored in advance.

FIG. 4 is a flowchart for explaining the brightness adjustment processing by the central control unit 12, and FIG. 5 is a flowchart for explaining the power supply state control processing by the central control unit 12.
With reference to these drawings, processing contents of the power consumption control method used in the portable POS device 10 of this embodiment will be described.
In this portable POS device 10, the luminance adjustment means (central control unit 12) adjusts the luminance of the illumination unit (backlight BL) based on the attitude (orientation) of the portable POS device 10 and the frequency of use of the key input unit. (Brightness adjustment processing). In this brightness adjustment process, the brightness of the illumination unit (backlight BL) is adjusted by the brightness adjustment unit (central control unit 12) when the attitude of the portable POS device 10 corresponds to the case where the key input unit is used frequently. While increasing (adjusts so that it becomes bright), it reduces (adjusts so that it becomes dark) when the attitude | position of the said portable POS apparatus 10 respond | corresponds to the case where the use frequency of the same key input part is low.

  That is, in the brightness adjustment process, the memory 11 partitions the posture of the portable POS device 10 and stores the brightness information of the illumination unit (backlight BL) set for each section of each posture in advance (brightness information). Amnestic processing). The acceleration sensor 13 measures the current posture of the portable POS device 10 (posture measurement process). The central control unit 12 reads luminance information of the illumination unit (backlight BL) corresponding to the attitude of the portable POS device 10 measured by the acceleration sensor 13 from the memory 11 (luminance information storage unit), and the luminance information Is set to the brightness of the illumination unit (backlight BL) (control processing). The buffer 24 manages the frequency of use of the key input unit within a certain period, and the buffer 25 manages the threshold of the frequency of use of the key input unit set for each posture of the portable POS device 10. When the frequency of use of the key input unit managed by the buffer 24 within a certain period exceeds the threshold value of the use frequency managed by the buffer 25, it is stored in the memory 11 by the central control unit 12. While the luminance corresponding to the existing luminance information is increased, when the luminance is smaller than the threshold, the luminance is decreased.

  In addition, the central control unit 12 controls the on / off state of the short-range communication unit 17 based on the attitude of the portable POS device 10 (power state control process). In this power state control process, the memory 11 stores in advance the power on / off state information of the short-range communication unit 17 set for each section of the posture by dividing the posture of the portable POS device 10 (power source). Information storage processing). The acceleration sensor 13 measures the current posture of the portable POS device 10 (posture measurement process). The central control unit 12 reads the power on / off state information corresponding to the current posture of the portable POS device 10 measured by the acceleration sensor 13 from the memory 11, and the short distance based on the on / off state information. The power on / off state of the communication unit 17 is controlled (control processing).

  That is, in the brightness adjustment process, for example, as shown in FIG. 4, in the task for processing the event (step A1), for example, the attitude of the portable POS device 10 is changed, the key input unit is operated, and the timer interrupt is generated. When any event occurs, the program shifts from the wait state to the program execution state. Information on the current orientation of the portable POS device 10 is read from the acceleration sensor 13 by the central control unit 12 (step A2). The central control unit 12 compares the read information with the device orientation range registered in the table of the buffer 21, and searches for a table corresponding to the current device orientation (step A3). When there is a change in the orientation of the apparatus (step A4), the central control unit 12 reads the backlight luminance stored in the table (buffer 22) searched in step A3, and sets the luminance of the backlight BL. (Step A4a), the timer for monitoring the backlight ON state is reset, and a timer interrupt is set (Step A4b).

  When key input occurs (step A5), the central control unit 12 increases the backlight luminance value stored in the table (buffer 22) searched in step A3 by one step (step A5a). However, if the backlight luminance is already set to the maximum value, it is left as it is. Then, the central controller 12 increases the number of inputs to the buffer 24 (step A5b), resets the timer interrupt for monitoring the backlight ON state, and resets the timer interrupt (step A5c). When a timer event occurs (step A6), the central control unit 12 sets the backlight to the off state (OFF) (step A6a), and stops the timer interrupt (step A6b).

  The central control unit 12 is interrupted at a predetermined time in the day (for example, 0:00 am), and the input frequency for the past seven days is examined. The buffer 24 is used as a ring buffer and records data for 7 days. If the number of inputs for 7 days is summed and is smaller than the input frequency threshold value of the buffer 25 (step A7), the initial value of the backlight luminance of the buffer 23 is copied to the backlight table of the buffer 22, and the luminance value is initialized. (Step A7a). The initial value of the backlight brightness of the buffer 23 is set in advance so that the device orientation assumed to be frequently used is the backlight on state and the device orientation backlight is assumed to be less frequently used. deep. If the number of inputs for 7 days is larger than the input frequency threshold value of the buffer 25 (step A7), the process returns to step A1.

  In the power supply state control process, for example, as shown in FIG. 5, there are a task for measuring the orientation of the device by the acceleration sensor 13 (step B <b> 1) and a task for controlling the short-range communication unit 17 (step B <b> 4). Subsequent to step B1, the central control unit 12 measures the orientation of the apparatus from the value of the acceleration sensor 13 (step B2). The central control unit 12 searches which table range of the buffer 31 the measured device orientation is in (step B3), and the power state (power control instruction) of the searched corresponding table (buffer 32) is The short distance communication unit control task is notified (step B4). In the short-range communication unit control task, the power of the short-range communication unit 17 is turned off when the power-off is notified, while the power of the short-range communication unit 17 is turned on when the power-on is notified. (Step B5). As a result, the power of the short-range communication unit 17 is controlled based on the direction in which the portable POS device 10 is held over the IC card, thereby saving power.

  As described above, in this embodiment, the central control unit 12 increases the luminance of the illumination unit (backlight BL) when the attitude of the portable POS device 10 corresponds to the case where the key input unit is used frequently. On the other hand, since the posture of the portable POS device 10 is decreased when dealing with a case where the frequency of use of the key input unit is low, power consumption is reduced. For example, the touch panel and key input unit are operated while the user looks at the screen, and the screen is operated in an easy-to-view direction. Come. In this case, power can be saved by dimming the backlight BL in a direction other than the screen operation. In addition, when the user continues the input process immediately after interrupting the input process, the backlight BL can be automatically turned on when the user is directed to a device that is frequently used. For example, in meter reading work such as a wattmeter, the user interrupts input processing for meter confirmation, and the backlight BL is turned on when input is continued after confirmation, so that the screen is easy to see. In addition, when the portable POS device 10 is placed over the shoulder and the direction of the device is changed while the meter is being checked, the backlight BL is turned off, so that power saving can be achieved. In addition, since the central control unit 12 controls the power on / off state of the short-range communication unit 17 based on the attitude of the portable POS device 10, power consumption is reduced.

The embodiment of the present invention has been described in detail with reference to the drawings. However, the specific configuration is not limited to the embodiment, and even if there is a design change without departing from the gist of the present invention, Included in the invention.
For example, the number of days for which the number of inputs is recorded in the buffer 24 of FIG. 2B is not limited to seven days. Further, a function for designating the number of days in which the number of times of input is recorded may be provided.
The short-range communication unit 17 is not limited to the IC card processing device, and may be any device having a short-range communication function such as Bluetooth.

  The present invention can be applied to all portable POS devices used in fields such as retail, route sales, warehouse / logistics, manufacturing, public, and medical.

10 portable POS device 11 memory (luminance information storage means, usage frequency information management means, power supply information storage means)
12 Central control unit (luminance adjustment means, control means, power supply state control means)
13 Acceleration sensor (Attitude measurement means)
14 Display control part (part of illumination part)
15 Input control unit (part of illumination unit)
17 Short-range communication unit (IC card processor)

Claims (11)

A portable POS device having a liquid crystal display unit, a key input unit, and an illumination unit for illuminating the liquid crystal display unit or / and the key input unit,
Brightness adjusting means for adjusting the brightness of the illumination unit based on the attitude of the portable POS device and the frequency of use of the key input unit ;
Use frequency information management means for managing a use frequency of the key input unit within a certain period and a threshold of the use frequency of the key input unit for each posture of the portable POS device; and
The brightness adjusting means includes
Luminance information storage means for preliminarily storing the luminance information of the illumination unit set for each section of each posture by partitioning the posture of the portable POS device;
Attitude measuring means for measuring the attitude of the portable POS device;
Control for reading the luminance information of the illumination unit corresponding to the current posture of the portable POS device measured by the attitude measurement unit from the luminance information storage unit, and setting the luminance of the illumination unit based on the read luminance information Means, and
The control means includes
When the usage frequency within a certain period of the key input unit managed by the usage frequency information management unit for each posture of the portable POS device exceeds the usage frequency threshold, the portable POS is stored in the luminance information storage unit. While increasing the luminance of the luminance information stored for each posture of the apparatus with a predetermined maximum value as an upper limit, and when smaller than the threshold, performing control to decrease the luminance with a predetermined minimum value as a lower limit A portable POS device. The posture measuring means includes
The portable X-axis orthogonal to each other of the POS device main body, the portable POS device in the Y-axis and Ζ claim 1, characterized in that it is configured to measure the orientation by detecting the change in axial velocity. And the short-range communication unit,
The power on / off state of the short-range communication unit, the portable POS device according to claim 1 or 2 wherein, characterized in that a power supply state control means for controlling based on the attitude of the portable POS device. The short-range communication unit
According to claim 3, wherein the non-contact type IC card or an electronic device having a non-contact type IC card equivalent features, comprising the IC card processing apparatus which is wirelessly connected when approaching the predetermined area cellular POS device. The power supply state control means includes
Power supply information storage means for preliminarily storing power on / off state information of the short-range communication unit set for each section of each posture by partitioning the posture of the portable POS device ;
The power supply on / off state information corresponding to the current posture of the portable POS device measured by the posture measurement means is read from the power supply information storage means, and the short-range communication unit based on the on / off state information portable POS device according to claim 3 or 4, characterized in that a control means for controlling the on / off state of the power supply. A liquid crystal display, a key input unit,
A power consumption control method used in a portable POS device having an illumination unit for illuminating the liquid crystal display unit and / or the key input unit,
A luminance adjustment unit adjusts the luminance of the illumination unit based on the attitude of the portable POS device and the usage frequency of the key input unit, and a usage frequency information management unit sets the luminance of the illumination unit for each attitude of the portable POS device. And a usage frequency information management process for managing a usage frequency of the key input unit within a predetermined period and a threshold of the usage frequency of the key input unit,
In the brightness adjustment process,
Luminance information storage means that partitions the posture of the portable POS device and stores in advance the luminance information of the illumination unit set for each posture section;
A posture measurement process in which the posture measurement means measures the posture of the portable POS device;
The control means reads the luminance information of the illumination unit corresponding to the current attitude of the portable POS device measured by the attitude measurement unit from the luminance information storage unit, and based on the read luminance information, the luminance of the illumination unit When the usage frequency within a certain period of the key input unit managed for each attitude of the portable POS device by the usage frequency information management means exceeds the threshold value of the usage frequency, the luminance information storage is performed. The brightness of the brightness information stored for each attitude of the portable POS device is increased with a predetermined maximum value as an upper limit, and when the value is smaller than the threshold, the brightness is decreased with a predetermined minimum value as a lower limit. Control processing,
Power consumption control method characterized by performing . 7. The power consumption control according to claim 6 , wherein the posture measuring means measures the posture by detecting a change in speed of the portable POS device body in the X-axis, Y-axis, and saddle axis directions orthogonal to each other. Method. The portable POS device includes a short-range communication unit ,
Power state control means, the power on / off state of the short-range communication unit, or claim 6, characterized in that it has a power state control process of controlling based on the attitude of the portable POS device 7 The power consumption control method described . The short-range communication unit
Consumption of claim 8, wherein the non-contact type IC card or an electronic device having a non-contact type IC card equivalent features, comprising the IC card processing apparatus which is wirelessly connected when approaching the predetermined area Power control method. In the power state control process,
A power information storage unit that preliminarily stores power on / off state information of the short-range communication unit set for each section of each posture by partitioning the posture of the portable POS device;
A posture measurement process in which the posture measurement means measures the posture of the portable POS device;
Control means reads from the power supply information storage means the power on / off state information corresponding to the current posture of the portable POS device measured by the posture measuring means, and based on the on / off state information The power consumption control method according to claim 8 or 9, wherein a control process for controlling an on / off state of a power supply of the short-range communication unit is executed . A power consumption control program for causing a computer to function as the brightness adjusting means constituting the portable POS device according to claim 1 .

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