JP2005030937A - Portable electronic apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To collect impact data of a portable electronic apparatus to facilitate improvement in an apparatus constituent parts and search for the cause of a trouble. <P>SOLUTION: The portable electronic apparatus includes therein an acceleration sensor of a notebook personal computer, a mobile phone, or the like. In the apparatus, the acceleration sensor is driven with the power source of at least an auxiliary battery of the apparatus so as to be capable of always detecting three-dimensional impacts applied to the apparatus. The impact data, consisting of three-dimensional component values of the impact acceleration and the date and time of the occurrence of the impact, are stored in a storage part in the apparatus in such a form which permits outputting. Accordingly, by analyzing the impact data, the improvement of the apparatus constituent part or the search for the cause of the trouble is facilitated. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

The present invention relates to a portable electronic device equipped with an acceleration sensor. The acceleration acceleration applied to the device is detected by the acceleration sensor, the impact data is stored in a storage unit in the device, and the impact data is output to a personal computer or the like for analysis. It is possible to do.

In recent years, portable electronic device devices that can be carried and carried have come to be widely used because of their convenience. Typical portable electronic device devices include notebook computers, digital video cameras, digital still cameras, electronic dictionaries, mobile phones, PDAs, etc., all of which are expensive and precise devices.

These portable electronic device apparatuses have a storage unit for storing electronic data. The electronic data stored in the storage unit includes a document file and data file in the case of a notebook computer, captured video data in the case of a digital camera, and a telephone number and mail address in the case of a mobile phone. Due to the nature of the device, these portable electronic device devices are often used personally, and important personal information is often stored as electronic data in the storage unit. Since the portable electronic device is carried and used, there is a possibility that an impact may be applied to the device due to careless handling such as bumping or dropping. It is a big problem for an apparatus user that a malfunction occurs in a part of the apparatus function due to the impact.

In the past few years, manufacturers' responsibility for products has been increasing from the viewpoint of consumer protection, including the PL Law. Increasingly, manufacturers have been sued for legal damages when users suffer from disadvantages that could be attributed to products. Device manufacturers tend to design products that increase the reliability of their products, and at the same time, component manufacturers tend to require components with excessive reliability. Design, prototyping, verification, and the like related to reliability improvement consume a lot of labor and time unless they are performed efficiently, resulting in increased costs.

An acceleration sensor is well known as a sensor for detecting an impact. Accelerometers are classified into piezoresistive, capacitive, and piezoelectric types by detecting acceleration.
Depending on how many axes of acceleration can be detected at the same time, it can be divided into one-axis type, two-axis type, three-axis type, and the like. A three-axis acceleration sensor is required to detect acceleration three-dimensionally, but three-dimensional acceleration detection is possible even when combined with a one-axis or two-axis acceleration sensor. Recently, MEMS (Microelectro Mechanical System)
ems) technology has been proposed. As an example, there is a piezoresistive acceleration sensor described in Patent Document 1. Since a sensor made by MEMS technology requires a small space for mounting, it is suitable for a device that is small and lightweight, such as a portable electronic device.

JP 2000-147000 (FIG. 1)

Examples of portable devices equipped with an acceleration sensor include Patent Document 2 to Patent Document 5.
In Patent Document 2, an acceleration sensor is mounted for the purpose of detecting an impact and avoiding malfunction of the apparatus. In Patent Document 3, an acceleration sensor is mounted for the purpose of starting a self-diagnosis of whether the device is normal by detecting an impact. In Patent Document 4, the acceleration sensor is mounted for the purpose of detecting and notifying that the device has been dropped. Patent document 5 uses acceleration detection of an acceleration sensor as information input means.

JP-A-5-143551 (FIG. 14) JP-A-6-169285 (FIGS. 1 and 2) JP-A-11-296765 (FIGS. 1 to 3) JP 2001-272413 (FIGS. 1 and 2)

When a user complaint related to a malfunction of a mobile device occurs, it is an important security issue to clarify the responsibility of the user or the device manufacturer, which is the cause of the user complaint. However, it is often difficult to identify the cause of a device failure unless the device failure is clearly considered an initial failure. Obviously the user's method of use is bad, and it can be assumed that the device is caused by excessive shock, but there is no evidence that the device will not be damaged unless the device is visually damaged. In some cases, it was necessary to guarantee.

On the other hand, when manufacturing portable electronic device devices, device manufacturers design with excellent impact resistance, and component manufacturers improve device reliability by supplying components with excellent impact resistance to device manufacturers. This is desirable. The impact applied to the portable electronic device itself and the components it constitutes is not simple, and there may be individual differences due to the influence of the device design such as the position of the device external operation keys and the age, personality, and habits of the device user. Predicted and conducting a simulated impact resistance test. However, it has been difficult to simulate such impacts by carrying around. To investigate the impact of the device in the environment where the device is actually used and how the impact affects the entire device or the individual components that make up the device using conventional technology Was difficult. As a component manufacturer, it is important in terms of component development what kind of impact is applied to components incorporated in a portable electronic device. By making it possible to design parts that match the impact data, it is possible to supply parts with excellent impact resistance to equipment manufacturers for use in portable electronic devices. It is also possible to reduce the manufacturing cost of parts by optimizing a design having excessive impact resistance.

In view of the above problems, in the present invention relating to a portable electronic device equipped with an acceleration sensor, the impact acceleration applied to the device is detected by the acceleration sensor, the impact data is stored in the storage unit in the device, and the impact data is output. By analyzing and investigating, the purpose is to investigate the cause of the failure of the device, collect impact data in the actual device, etc., and enable the development of a portable electronic device with excellent impact resistance.

In the portable electronic device equipped with the acceleration sensor according to the present invention, the acceleration sensor composed of one or a plurality of combinations constantly detects at least a three-dimensional impact acceleration applied to the device by the internal battery of the device. When impact acceleration equal to or higher than the acceleration threshold (hereinafter referred to as threshold) is applied to the device, impact data including a three-dimensional component value of impact acceleration and a history of the date and time of occurrence of impact is stored in the portable electronic device. It is desirable that the data can be stored in a section, and impact data can be output for analysis.

The portable electronic device device according to the present invention includes at least a display unit that displays operation status and input / output data, a voice input / output unit such as a microphone and a speaker, an operation unit such as an operation key and a pointing pad, and data such as a USB terminal and an infrared port. Input / output unit, power supply unit for driving acceleration sensors and portable devices, storage units for semiconductor memories such as RAM and ROM, and other hard disks (
HDD), a functional unit such as a CD and a DVD, a calculation unit that performs calculation, an acceleration sensor, and a control unit that controls these.

It is desirable that the acceleration sensor can detect three-dimensional acceleration by combining one or a plurality of acceleration sensors. Usually, since the direction of acceleration applied to the portable electronic device is random, it is desirable that the accelerations in all three dimensions can be detected. The three-axis acceleration sensor is desirable in that the number of parts is reduced because three-dimensional acceleration can be detected by one sensor. A small acceleration sensor using the MEMS technology can reduce a mounting space, and thus is particularly desirable in a portable electronic device device that is limited by the size of the device.

Since the portable electronic device does not always have the main power switch turned on when it is carried, it is desirable to be able to always detect the impact acceleration regardless of whether the main power switch is turned on or off.

The acceleration sensor mounted on the portable electronic device according to the present invention is preferably driven by any power supply from the external power supply of the power supply unit, the main battery, and the auxiliary battery. The external power source mentioned here is a power source obtained by stepping down and rectifying a household power source, and supplies power to the apparatus when the main power switch is ON. The built-in power source is a battery that supplies power when the main power source is turned on, and often has a structure that can be easily replaced or charged. An auxiliary battery is a battery that is provided to maintain the clock function even when the main power switch is OFF. It is a primary or secondary battery that can be easily replaced from the outside or built into a circuit board. Some of them cannot be easily replaced. In order to constantly detect the impact acceleration, it is necessary to be able to detect the impact acceleration even when the main power switch is off, and it is desirable to drive at least with an auxiliary battery. A normal electronic device uses an auxiliary battery with a voltage of 3 to 5 V in order to maintain a clock function, etc. If the acceleration sensor is driven with this voltage, it is not necessary to provide a new battery. It is desirable to use an acceleration sensor driven by voltage. Driving the acceleration sensor with an auxiliary battery when the main power supply is OFF, and with the auxiliary battery or an external power supply when the main power supply is ON is preferable because the life of the auxiliary battery can be extended.

The impact data is preferably stored in the semiconductor memory of the storage unit. A semiconductor memory saves power compared with other storage devices such as HDDs and has a high data response speed. In the portable electronic device according to the present invention, it is desirable to use an auxiliary battery in order to constantly detect impact acceleration, and a power-saving semiconductor memory is desirable in order to reduce the load on the power source. In addition, a normal RAM requires power supply for data storage, but a nonvolatile memory does not. It is more desirable that the impact data is stored in the nonvolatile RAM in terms of power saving.

The impact data stored in the storage unit includes a three-dimensional component value of impact acceleration and an impact occurrence date and time. It is not desirable from the viewpoint of power saving to perform data processing such as obtaining the absolute value or direction of impact applied from the three-dimensional component values before storage because it imposes a load on the arithmetic unit.
The date and time of occurrence of the impact is important for knowing when the impact is applied, and it is desirable to store it as impact data together with the impact acceleration value. The impact acceleration value to be stored is limited to a predetermined threshold value or more. Saving all impact acceleration values applied to the device as impact data is not realistic because the amount of data becomes enormous. By setting the impact data to be saved above the threshold, it is possible to narrow down the number of data to be saved,
This is desirable because the load on the calculation unit and the storage unit can be reduced, leading to power saving. The threshold value may be changed from the external input unit of the portable electronic device as required.

It is desirable that the number of stored impact data is 10 or more and 1000 or less. When the number of impact data items to be stored is less than 10, even if impact acceleration information that directly leads to a device failure is obtained, the number is insufficient to obtain a history trend. Number of data saved is 1
If the number exceeds 000, it is difficult to use the storage unit used by the portable electronic device for storing shock data, and it is not desirable because a new storage function needs to be added. The number of data items to be stored may be changed from the external input unit of the portable electronic device as necessary. In order to reduce the load on the storage unit, the data in the storage unit can be transferred or copied to a functional unit such as an HDD when the main power is turned on at an appropriate time.

For outputting the impact data, a display unit of the apparatus, a display unit of an external computer, an external printer, or the like can be used. For data transfer to an external device, in addition to wired and wireless data transfer, a storage medium such as a memory card can be used. As the output display contents of the impact data, in addition to the impact occurrence date and time and the three-dimensional component value of the impact acceleration, the absolute value of the acceleration and the angle when displayed in polar coordinates may be output together. The output order of the impact data is preferably in the order of the magnitude of the acceleration values and the date and time of occurrence of the impact, since the data analysis is easy and easy to understand.

In the portable electronic device according to the present invention, if the impact acceleration value detected by the acceleration sensor is less than a predetermined threshold value, the impact data is erased without being saved, and if the impact acceleration value is greater than the threshold value, A comparison is made between the impact acceleration value and the impact acceleration value of the impact data already stored in the storage unit, and if it does not fall within the predetermined number of records, the impact data is saved. If the impact acceleration value falls within the predetermined number of records in the order of size, the impact data is added and saved as new impact data in the storage unit at the same time. By deleting the lowest impact data in the order of the magnitude of the impact acceleration, the number of impact data stored in the storage unit can be kept within a certain number.

In case of failure analysis of portable electronic devices, how much impact acceleration is added to the device is often important, and the number of stored impact data should not exceed a certain number in order not to load the storage unit. It is desirable to do. Therefore, if you try to save the impact data exceeding a certain number, the impact data including the minimum impact acceleration value saved at the same time will be deleted, and the impact data will exceed the certain number in order of the history of the impact acceleration value. It is desirable that the number is not stored in the device storage unit. When a certain number of cases are reached, the stored minimum shock acceleration value may be automatically set as a threshold value.

In the portable electronic device according to the present invention, when the impact acceleration value detected by the acceleration sensor is equal to or greater than a predetermined threshold value, in the flow for determining whether or not to store the impact data as new impact data, It is desirable to add a function to warn the user of the device by a visual or audible method when the main power source of the portable electronic device is turned on, when an impact acceleration exceeding a predetermined threshold is applied to the device.

Warning the device user that impact acceleration exceeding a predetermined threshold has been applied to the device has the effect of urging the user to use the device safely and has the effect of reducing the failure rate of the device. It is believed that there is. As a means of warning, a visual method or an audible method is desirable. As a visual method, a display, a lamp, etc., as an audible method,
Beep sounds, chimes, voice messages, etc. can be used.

Although it is desirable that a warning be issued in a series of flows for determining whether or not to store additional shock data, in order to minimize the load on the power source, the warning is the main power source of the portable electronic device. It is desirable to emit only when is ON. When an impact acceleration is issued that gives a warning when the main power is turned off, the warning can be surely notified to the user by being issued visually or audibly next time the main power is turned on. When the main power is turned off, the user may be away from the portable electronic device, and even if a visual or audible warning is issued, it will not be transmitted to the user, but the auxiliary battery will be consumed faster. End up. By only turning on the main power supply, it is possible not only to prevent the auxiliary battery from being consumed, but also to inform the user that impact acceleration exceeding the threshold has been applied to the portable electronic device when the main power supply is turned off. be able to.

As an effect of the present invention, a portable electronic device device equipped with an acceleration sensor detects an impact acceleration applied to the device by an acceleration sensor, stores the impact data in a storage unit in the device, and analyzes the impact data, It can help to investigate the cause of malfunctions, to help manufacturers protect themselves against malfunction complaints, collect impact data on actual products, and improve equipment components.

An embodiment of the present invention will be described using a notebook computer, a digital still camera, and a mobile phone.

As an embodiment relating to the portable electronic device of the present invention, a notebook personal computer will be described.
FIG. 1 is a block diagram of an electronic apparatus apparatus according to the present invention. FIG. 2 is an external view of a notebook personal computer according to an embodiment of the present invention, FIG. 2a) is a perspective view from the top side of the personal computer, and FIG. 2b) is a perspective view from the bottom side. As shown in FIG. 1, the notebook personal computer of the present embodiment includes a display unit 1, a voice input unit 2, an operation unit 3, a data input / output unit 4, a power supply unit 5, a storage unit 6, a function. The unit 7, the calculation unit 9, and the acceleration sensor 10 are configured. As shown in FIG. 2, the external part of the notebook computer 100 is in the housing 93, the display 11 as the display unit 1, and the voice input / output unit 2.
As the speaker 21 and the microphone 22, the operation key 31 and the pointing pad 32 as the operation unit 3, the external input / output terminal 41 as the data input / output unit 4, and the external power supply terminal 51 as the power supply unit 5.
And a main battery 52, an auxiliary battery 53, a main power switch 54, and the like.

Although not shown in the figure inside the notebook personal computer, the storage unit 6 includes ROM, RA
M, a non-volatile RAM, a control unit 8 for controlling the entire apparatus, a calculation unit 9 for processing data and the like, and an acceleration sensor 10. The impact acceleration value detected by the acceleration sensor 10 is compared with the threshold value by the calculation unit 9 and if it is equal to or greater than the threshold value, the nonvolatile RA in the storage unit 6 is used.
Stored in M. In addition, in order to minimize the consumption of the auxiliary battery, the electric power related to the detection of the impact acceleration is preferentially supplied in the order of the external power source, the main battery 52, and finally the auxiliary battery 53. It is assumed that it can always be detected by electric power.

The notebook computer 100 according to the present embodiment mainly includes a display 11 and operation keys 3.
1 is a foldable structure. Therefore, FIG. 2a)
The acceleration sensor 10 (not shown) is mounted on the display unit and the operation key unit as shown in FIG. Two 2-axis capacitive acceleration sensors are used for the operation key, and a 3-axis piezoresistive acceleration sensor manufactured by MEMS technology is used for the display where the mounting space is limited.
Used. The coordinate directions related to the acceleration measurement were set to the X, Y, and Z directions shown in FIG. 2a) with the operation key portion horizontal and the display vertical.

An example of the flowchart used in FIG. 3 is shown. From the measurement state (S0) to impact data storage and warning will be briefly described. FIG. 3a) shows the case where the main power is ON and the impact acceleration is detected (S1).
Comparison with threshold value (S2) If it is less than the threshold value, the process returns to the measurement state (S0). If it is equal to or greater than the threshold value, it is determined whether or not to store the impact data (S3). Save if the number is less than the set number (S4)
And warn (S5) and return to the measurement state (S0). If the number of saved settings exceeds the limit, the impact data having the minimum impact acceleration value is deleted, then new impact data is saved (S4) and a warning (S5)
Return to the measurement state (S0). Fig. 3b) shows the case where the main power is OFF and the impact acceleration is detected (S
1) Comparison with threshold value (S2) If it is less than the threshold value, the process returns to the measurement state (S0). If it is equal to or greater than the threshold value, it is determined whether or not to store the impact data (S3). Save if the number is less than the set number
) To return to the measurement state (S0). If the number of stored settings is exceeded, the impact data having the minimum acceleration value is deleted, then new impact data is saved (S4), and the measurement state (S0) is returned. When the main power is turned on, a warning is given that an impact greater than the threshold has been applied (S5).

The threshold value was 250 (G), and the maximum number of saved items was 100. At least when the main battery is used (when the main power is turned on), the warning sounds a beep from the speaker 21 and the message "Abnormal impact acceleration detected!" The data can be displayed.

An analysis method and display example of impact data stored in the nonvolatile RAM inside the portable electronic device are shown in FIGS. FIG. 4 shows an example of a connection between an external computer 400 and a printer 500 having a program for analyzing the absolute value of acceleration and the direction of acceleration from the tested personal computer 100 and a three-dimensional acceleration value. An example of impact data stored in the storage unit that can be displayed on the display unit of the personal computer 100 tested is shown in FIG. The impact data is displayed in order of the XYZ component of impact acceleration in order from the largest. As shown in FIG. 4, the external input / output cable 101 is connected to the external input / output terminal 41 of the test personal computer, and the external computer 400 is connected to the external computer 400 via the printer cable 501 for analysis. The printed data was printed 502. An example of the analyzed data 502 is shown in FIG. The analyzed data was displayed in the order of absolute values of acceleration. The direction is displayed with the angles in the Y direction and Z direction with reference to the plus side of the X axis, and the counterclockwise direction is shown as plus. Of course,
If the tested personal computer 100 operates normally and has an analysis program, the external computer 400 may be omitted.

As another embodiment of the present invention, an example in which an acceleration sensor is mounted on a digital still camera will be described. To make the explanation easy to understand, the same reference numerals are used for parts and parts having the same function. FIG. 6 is an external perspective view of a digital still camera that is an embodiment of the present invention. 6A) is a front perspective view of the digital still camera, and FIG. 6B) is a rear perspective view. When the block diagram of FIG. 1 and the external view of FIG. 6 are combined, the housing 93, the display 11 as the display unit 1, the speaker 22 as the audio input / output unit 2, the operation keys 31 and the shutter 33 as the operation unit 3, and the data input / output unit 4, an external input / output terminal 41 and a memory card slot 42, a power supply unit 5 as an external power supply terminal 51, a main battery 52, an auxiliary battery 53, a main power switch 54, and a function unit 7 as a lens 7.
1 and a flash 72 or the like.

Although not shown inside the digital still camera 200, the storage unit 6 includes a ROM, a RAM, and a non-volatile RAM. The control unit 8 controls the entire apparatus, and performs arithmetic processing on data and the like. Part 9 and acceleration sensor 10. Accelerometer 10
The impact acceleration value detected in (1) is compared with the threshold value by the calculation unit 9 and is stored in the nonvolatile RAM of the storage unit 6 if it is equal to or greater than the threshold value. In order to minimize the consumption of the auxiliary battery, the impact acceleration is detected with priority given to the external power source 51, the main battery 52, and finally the auxiliary battery 53, and the power from the auxiliary battery 53 is minimized. Therefore, it is possible to detect at all times.

For the digital still camera 200 of this embodiment, a small three-axis piezoresistive acceleration sensor manufactured using MEMS technology was used. The coordinate direction related to the data output is the case 93.
The both side direction, front / back direction, and up / down direction were respectively the X, Y, and Z directions. The threshold was 500 (G), and the maximum number of data saved was 50.

As another embodiment of the present invention, an example in which an acceleration sensor is mounted on a mobile phone 300 will be described.
FIG. 7 is an external perspective view of a mobile phone that is an embodiment of the present invention. FIG. 7a) is a front perspective view from the top side of the mobile phone, and FIG. 7b) is a back perspective view from the bottom side. When the block diagram of FIG. 1 and FIG. 7 are combined, the housing 93 has a display 11 as the display unit 1, a speaker 21 and microphone 22 as the audio input / output unit 2, an operation key 31 as the operation unit 3, and a data input / output unit 4. The infrared power port 43, the antenna 74, and the power source 5 include an external power source 51, a main battery 52, an auxiliary battery 53, and a main power switch 54. Although not shown in the figure inside the mobile phone, the storage unit 6 includes a ROM, a RAM, and a nonvolatile RAM, and includes a control unit 8 that controls the entire apparatus, an arithmetic unit 9 that performs arithmetic processing on data, An acceleration sensor 10 is provided. The impact acceleration value detected by the acceleration sensor 10 is stored in the nonvolatile RAM of the storage unit 6. In addition, in order to minimize the consumption of the auxiliary battery, the impact acceleration is preferentially supplied in the order of the main battery 52 and the auxiliary battery 53, and can be always detected by the power from the auxiliary battery 53 at a minimum. did.

Because mobile phones have more space for mounting accelerometers than laptop computers, M
A piezoresistive triaxial acceleration sensor manufactured using EMS technology was used. The coordinate directions related to the data output are the side direction, front / back direction, and vertical direction of the casing 93, respectively X, Y, Z
I tried to be in the direction. The threshold was 500 (G), and the maximum number of data saved was 200. In addition, at least when the main battery is used (when the main power is turned on), when an impact acceleration larger than the threshold is applied, a beep sound is emitted from the speaker 21 and the display 11 “ If you don't use it, it will break! ”Message and shock data are displayed.

The effect of mounting an acceleration sensor on a portable electronic device will be described with a notebook computer. In developing a portable notebook PC with a large screen, 100 units were tested for 2 months to investigate the impact value applied during practical use. When the acceleration threshold is set to 500 (G), a warning sound and a warning display will be issued when the computer is placed on a desk or inadvertently bumped into something in the initial stage of use. There were many, but after that it became clear that the warning sound and the number of warning indications were greatly reduced because of the careful handling of the laptop. The following are the results of a survey of three computers that had problems during the two-month test. One was dropped on the concrete floor during carrying, and the appearance was severely damaged. When the impact data was investigated, it was found that an impact acceleration of 2000 (G) or more was applied.

The latter two units have almost no appearance damage, and there is no memory that the user has dropped them on the floor, etc., so when examining the impact data, one unit has an impact of 1000 (G) in the horizontal direction of the liquid crystal screen. It was found that 800 (G) was added in the diagonal direction of the liquid crystal screen in the other unit. In either case, the failure occurred in the electrode part of the liquid crystal screen. As a result of additional tests, it was found that a malfunction occurred at 1050 (G) in the horizontal direction of the liquid crystal screen and 700 (G) in the diagonal direction. Therefore, a study was conducted to increase the impact resistance in the diagonal direction. It was possible to improve until the same level of impact resistance was obtained. In addition, the mounting method of the liquid crystal screen and the housing has been improved, and 1100 (G)
The impact resistance of the LCD screen could be improved. After conducting a more detailed interview,
It turned out that someone other than the user himself touched the PC and dropped it on the floor. In this way, if a malfunction occurs due to a large impact without the user's knowledge, it is reported as a product claim. If the manufacturer does not know the impact value applied to the device, it must be compensated as a defective product. As in the present invention, the portable electronic device is provided with an acceleration sensor, and the impact data is shown to the user, so that the reliability of the product can be won.

Representative devices for portable electronic devices are not only personally used devices such as notebook computers, digital video cameras, digital still cameras, electronic dictionaries, mobile phones, PDAs, but also many people such as communication devices and measuring instruments. The present invention can also be applied to a portable electronic device used by the company.

It is a block diagram of the configuration of the portable electronic device of the present invention. It is a perspective view of the notebook computer of the present invention. It is a flowchart from the acceleration measurement of this invention to memory | storage and warning. It is a figure which shows the impact data analysis method of this invention. It is an example of a display of the impact data and analyzed data of the present invention. It is a perspective view of the digital still camera of the present invention. It is a perspective view of the mobile phone of the present invention.

Explanation of symbols

1 Display section, 2 Voice input / output section, 3 Operation section, 4 Data input / output section, 5 Power supply section,
6 storage unit, 7 function unit, 8 control unit, 9 calculation unit, 10 acceleration sensor,
11 Display, 21 Speaker, 22 Microphone, 23 Earphone,
31 operation keys, 32 pointing pads, 33 shutters,
41 External input / output terminal, 43 Infrared port, 51 External power supply terminal, 52 Main battery,
53 Auxiliary battery, 54 Main power switch, 71 Lens, 72 Flash,
74 antenna, 93 housing, 100 laptop, 101 external input / output cable,
200 digital still camera, 201 memory card, 300 mobile phone,
400 external computer, 500 printer, 501 printer cable,
502 print.

Claims (3)

A mobile electronic device equipped with an acceleration sensor, which is composed of one or a plurality of combinations, constantly detects at least a three-dimensional impact acceleration applied to the device by an auxiliary battery of the device, and is determined in advance. When impact acceleration greater than the acceleration threshold is applied to the device, impact data consisting of the three-dimensional component value of impact acceleration and the date and time when the impact occurred is stored in the storage unit in the portable electronic device, and the impact data is output and analyzed. A portable electronic device characterized by being provided for. If the impact acceleration value detected by the acceleration sensor is less than the predetermined acceleration threshold value, the impact data is deleted without being saved. If the impact acceleration value is greater than the acceleration threshold value, the impact acceleration value is Comparison is made with the impact acceleration value of the impact data already stored in the storage unit, and if the impact acceleration value does not fall within the predetermined number of records in order of size, the impact data is saved. If the impact acceleration value falls within the predetermined number of records in the order of size, it is added and saved as new impact data in the storage unit, and at the same time, the already saved impact acceleration 2. The mobile phone according to claim 1, wherein the lowermost impact data in the order of the size of the mobile phone is erased so that the number of impact data stored in the storage unit does not exceed a certain number. Equipment devices. When the impact acceleration value detected by the acceleration sensor is greater than or equal to a predetermined acceleration threshold value, in the flow for determining whether to save the impact data as new impact data,
The device is equipped with a function to warn the user of the device by a visual or audible method when the main power of the portable electronic device is turned on, when an impact acceleration exceeding a predetermined acceleration threshold is applied to the device. The portable electronic device apparatus according to claim 1 or 2.

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