JP2002090326A - Portable electronic equipment - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a portable electronic equipment enabling a user to easily and positively know the state of the equipment in various environment, having a built-in power source and portable outdoors. SOLUTION: A sensor part is provided in a casing of this portable electronic equipment, and the state of temperature, humidity, and the like in the casing is expressed by character images 40-54 and displayed on a display part.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a portable electronic device which has a built-in power supply and can be taken outside.

[0002]

2. Description of the Related Art Portable electronic devices powered by secondary batteries such as lithium-ion batteries, nickel-cadmium (nickel-cadmium) batteries, or nickel-metal hydride batteries are generally small, lightweight and highly portable, and can be carried anywhere at any time. It is convenient to carry around.

As portable electronic devices, magnetic tapes, M
Portable audio equipment, portable personal computers, digital cameras, portable radios, portable televisions, and the like using D (mini disc), CD (compact disc), solid-state memory, or HDD (hard disc drive) as a recording medium. is there. Further, mobile communication devices such as mobile phones, personal handy phones (PHS; registered trademark), and portable information terminals are also widely used as portable electronic devices.

[0004]

By the way, since portable electronic equipment is small and lightweight and can be carried, there is a functional block which should provide a predetermined function by power supply from a power supply depending on the surrounding environment or the like. In some cases, the function cannot be performed. For example, when the product is used in a high-humidity atmosphere such as outdoors in the rain, or is suddenly brought into a heated room from a low-temperature outdoor in the winter, the inside of the housing may be condensed. It is used in a high-temperature environment such as inside or in a low-temperature environment such as outdoors in winter, or when the housing is subjected to shock or vibration or dropped.

However, for portable electronic devices, there is no fundamental measure for protecting the functional blocks from abnormal fluctuations in temperature. As a method of protecting the functional block from humidity, it is conceivable to improve the hermeticity of the housing to increase the waterproofness, and the like. Further, as a method of protecting the functional block from an impact, a material having cushioning properties may be used for the housing, or a cushioning material may be interposed between the housing and the functional block. However, generally, the above measures have not been taken for portable electronic devices. The first reason is that if the above measures are taken, the weight of the device will increase and the portability will be impaired. Secondly, there is a point that the cost in manufacturing the device is increased.

[0006] In addition, since the portable electronic device usually moves with the user, if the user can grasp the state of the device under various environments, the failure of the device can be prevented beforehand. However, the conventional device has not only a function of protecting the function block but also a problem that the user cannot understand the current state of the device.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a portable electronic device in which a functional block for providing a predetermined function is less likely to be broken down due to abnormal fluctuations in temperature and humidity in the housing, impacts on the housing, and the like. It is in. The object of the present invention is
An object of the present invention is to provide a portable electronic device that allows a user to easily and surely know the state of the device under various environments.

[0008]

SUMMARY OF THE INVENTION An object of the present invention is to provide a portable electronic device having a built-in power supply and capable of being taken out of the room and provided with a predetermined function by supplying power from the power supply. And a sensor unit provided in the housing to protect the functional block, detecting a state in the housing and outputting a state detection signal, and storing character image data representing a specific state in the housing. A storage unit, a control unit that reads out the character image data from the storage unit based on the detection signal and generates a display signal, and a display unit that displays a character image based on the display signal. Achieved by portable electronic devices.

In the portable electronic device of the present invention, the sensor unit detects a temperature in the housing and outputs a temperature detection signal, and a humidity detection signal by detecting humidity in the housing. And a shock sensor that detects a shock to the inside of the housing and outputs a shock detection signal.

In the portable electronic device of the present invention, the sensor unit detects a temperature in the housing and outputs a temperature detection signal, and a humidity detection signal by detecting humidity in the housing. , And at least two of a humidity sensor that detects an impact into the housing and outputs an impact detection signal. In the portable electronic device according to the present invention, the storage unit has the character image data that differs for each sensor.

In the portable electronic device according to the present invention, when the sensor unit has a temperature sensor, the control unit determines that a temperature in the housing exceeds a predetermined threshold value based on the temperature detection signal. Then, the character image data representing the temperature state is read from the recording unit to generate the display signal, the character image is displayed on the display unit, and when the sensor unit has a humidity sensor, the control unit Based on the humidity detection signal, when the humidity in the housing exceeds a predetermined threshold, reads out the character image data representing the humidity state from the recording unit, generates the display signal, and displays the character on the display unit. When an image is displayed and the sensor unit has an impact sensor, the control unit determines that an impact on the housing exceeds a predetermined threshold based on the impact detection signal. Et al., The character image data representing the shock state is read from the recording unit generates the display signal, characterized in that for displaying the character image on the display unit.

In the portable electronic device according to the present invention, when the sensor unit has a temperature sensor, the control unit determines that a temperature in the housing exceeds a predetermined threshold based on the temperature detection signal. Then, the power supply from the power supply to the functional block is interrupted until the temperature in the housing becomes equal to or less than a predetermined threshold, and when the sensor unit has a humidity sensor, the control unit controls the humidity detection signal. When the humidity in the housing exceeds 90% RH, the power supply from the power supply to the functional block is shut off until the humidity in the housing becomes equal to or less than a predetermined threshold.

The portable electronic device according to the present invention is characterized in that the portable electronic device further comprises a warning unit for issuing a warning almost simultaneously with displaying the character image on the display unit.

In the portable electronic device according to the present invention, the functional block has a mobile communication function.

[0015]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A portable electronic device according to an embodiment of the present invention will be described with reference to FIGS. In the present embodiment, an information recording / reproducing device will be described as an example of a portable electronic device having a built-in power supply and being portable outside. FIG. 1 is a schematic configuration of an information recording / reproducing apparatus 1 according to the present embodiment, and shows functional blocks for providing a predetermined function by supplying power from a power supply. FIG. 2 shows an example of a display screen of the information recording / reproducing apparatus 1 according to the present embodiment. As shown in FIG. 1, the information recording / reproducing apparatus 1 includes a driving device 3 that drives, for example, a CD 18 as an information recording medium that rotates to read information.

The information recording / reproducing apparatus 1 includes two memory cards 2a and 2b each having a solid-state memory as an information recording medium.
And interfaces 4a and 4b for transferring digital data between them. The memory cards 2a and 2b are detachably attached to the interfaces 4a and 4b, respectively. Memory card 2
Various memory cards can be used as a and 2b.

The interfaces 4a and 4b are controlled by a system control unit 7, and music data transferred from the interface is transferred to a reproduction output unit via the system control unit 7. System control unit 7
Is designed to control not only the interfaces 4a and 4b but also each circuit in the device 1.

The information recording / reproducing apparatus 1 has a display 6 composed of, for example, a liquid crystal display. The display 6 is electrically connected to the display control unit 5 and can display the title of the music being played, the playing time of the music, the remaining battery level, and the like. These display data are included in the music data read from the memory cards 2a, 2b via the interfaces 4a, 4b. The system control unit 7 sends these display data to the display control unit 5 from the read music data. The display control unit 5 controls the display 6 so that the display data sent is displayed on the display 6 in a predetermined manner.

The information recording / reproducing apparatus 1 has a storage unit 15 in which various kinds of information are written and read by the system control unit 7. The storage unit 15 stores display data such as a character image indicating a specific state in the housing. Here, the character image is generally an image of a character such as a television, a movie, a manga, or the like, but is not limited to these images in the present embodiment, and may be an inanimate object such as a person, an animal, and a plant. Image is widely included. These display data are read by the system control unit 7 and sent to the display control unit 5. The display control unit 5 controls the display 6 so that the display data sent is displayed on the display 6 in a predetermined manner.

The information recording / reproducing apparatus 1 has an audio DSP 8 and a codec 9. The audio DSP 8 and the codec 9 are controlled by the system control unit 7. The DSP 8 performs data processing such as compression / expansion processing of music data input from the system control unit 7 and effect processing as necessary, under the control of the system control unit 7. The processed data is returned to the system control unit 7 again or output to the codec 9. The DSP 8 according to the present embodiment has a plurality of decoder functions corresponding to each data format so that a plurality of music data created in various data formats can be reproduced. Therefore, for example, even if MP3 data is recorded on the memory card 2a, music data according to TwinVQ (a data compression method developed by NTT) is recorded on the memory card 2b, and WAVE data is recorded on the CD 18, system control is performed. Under the control of the unit 7, recording / reproduction can be performed for all of them.

The output terminal of the codec 9 is connected to the input / output terminal 14. The codec 9 includes a D / A (digital-analog) converter and an A / D converter so that music is output as analog data from the input / output terminal 14 or conversely, analog music data is input and converted into digital data. A D (analog-digital) converter is built in.

The music data received by the system control unit 7 when the music is reproduced is sent to the DSP 8 if compression processing such as MP3 has been performed, and expansion processing is performed. The expanded music data is sent to the codec 9 and output from the input / output terminal 14 as an analog music signal. Music data that has not been subjected to compression processing is directly input from the system control unit 7 to the codec 9 and output from the input / output terminal 14 as an analog music signal.

The analog music data input to the input / output terminal 14 is converted to digital data by the codec 9 and then sent to the DSP 8 when data compression and recording are performed. The music data sent to the DSP 8 is sent to the system control unit 7 after being subjected to a predetermined compression process. When recording as uncompressed data, data is output directly to the system control unit 7 without passing through the DSP 8. The music data for recording sent to the system control unit 7 is output to the memory card 2a or 2b via one of the interfaces 4a and 4b and recorded under the control of the system control unit 7.

The system control unit 7 stores information recording /
A signal from a control switch 16 used by a user of the playback apparatus 1 is input. Control switch 16
Specifically, a mechanical switch provided outside the housing of the information recording / reproducing apparatus 1 may be used.
Or a remote control switch provided in the middle of a cable of a headphone or an earphone connected to the output terminal. The control switch 16 can be provided with various switching functions as needed. For example, a signal for switching the power of the information recording / reproducing apparatus 1 on / off, switching between a recording mode and a reproducing mode, switching music data to be reproduced, or skipping music is transmitted to the system control unit. 7 may be sent. Alternatively, a signal for switching the display data to be displayed on the display 6 described above may be sent to the system control unit 7. The system control unit 7 includes the control switch 1
The respective circuits are controlled so as to be in a desired state in response to the signal from 6.

Next, the power supply of the information recording / reproducing apparatus 1 will be described. The information recording / reproducing apparatus 1 includes a secondary battery 1 for supplying power to each circuit in the information recording / reproducing apparatus 1.
1 is built-in. As the secondary battery 11, for example, a nickel-metal hydride battery or a lithium ion can be used. The information recording / reproducing apparatus 1 also has a built-in charging circuit 10 for charging the secondary battery 11. The charging circuit 10 is connected to an external AC adapter terminal 13. By connecting the output terminal of the AC adapter to the external AC adapter terminal 13, a predetermined voltage can be applied to the charging circuit 10 to charge the secondary battery 11.

Also, while the secondary battery 11 is being charged, a voltage of, for example, 2.4 V can be applied to each circuit from the secondary battery 11 side. The output terminal of the secondary battery 11 is also connected to a booster circuit 12, so that a voltage of 3.3 V can be applied from the booster circuit 12 to each circuit.

Information recording / reproducing apparatus 1 according to the present embodiment
Is a temperature sensor 2 which is surface-mounted on a circuit board in the housing and senses the temperature in the housing in order to protect the functional block having the above configuration in the housing from abnormal fluctuations in temperature.
It has 0. The temperature sensor is preferably a small and lightweight one, particularly a chip-shaped part.

The temperature detection signal from the temperature sensor 20 is sent to the system controller 7 via a signal line 26. The temperature sensor 20 is an NTC whose resistance value decreases with increasing temperature.
It is a thermistor. The system control unit 7 includes the temperature sensor 2
Based on the temperature detection signal from 0, when the temperature inside the housing exceeds a predetermined threshold, the character image data written in the storage unit 15 is read out, and the character image is displayed on the display 6 via the display control unit 5. Let it. The above-mentioned threshold value is set near the maximum use temperature and the minimum use temperature of the information recording / reproducing apparatus 1, but is also set in some other ranges that do not affect the operation of the functional blocks. The displayed character image includes, for example, a facial expression figure,
It consists of a combination with the surrounding figures. The figure of the facial expression represents the level of the warning, and the surrounding figures represent the type of the warning.

When the temperature inside the housing rises and exceeds the first threshold value (high temperature level 1), what is displayed on the display 6 is
It is a high-temperature level 1 character image 40 as shown in FIG. The three curves of the waveform at the top of the face represent a state in which steam is flowing from the head, and represent that the temperature is high. The eyes formed by the downward semicircle and the mouth formed by the upward semicircle express a slight discomfort. When the temperature further rises and exceeds the second threshold value (high temperature level 2), what is displayed on the display 6 is as shown in FIG.
High-temperature level 2 character image 4 as shown in (a2)
2. The three curves of the waveform at the top of the face are the same as the display screen example of the high temperature level 1, but the facial expression is changed. The eyes with a cross and the mouth with a cross shape express extremely discomfort.

When the temperature in the housing exceeds a third threshold set near the maximum operating temperature of the information recording / reproducing apparatus 1 based on the temperature detection signal from the temperature sensor 20, the system control unit 7 2 until the temperature of the
It has a function as a protection circuit that cuts off power supply from the next battery 11 to the above functional blocks. The system control unit 7 as a protection circuit prohibits the discharging or charging of the secondary battery 11 when detecting an abnormality in the temperature inside the housing.
After shutting off the power supply to the functional blocks, the system control unit 7
The supply of power to the functional blocks is stopped until the temperature in the housing becomes equal to or lower than the second threshold.

On the other hand, when the temperature in the casing falls and exceeds the first threshold value (low temperature level 1), what is displayed on the display 6 is the low temperature level 1 as shown in FIG. This is a character image 44. The two saw-shaped lines on both sides of the face indicate that the face is shivering in the cold and that the temperature is low. In the same manner as described above, the eyes formed by the downward semicircle and the mouth formed by the upward semicircle express a slight discomfort. When the temperature further falls and exceeds the second threshold value (low temperature level 2), what is displayed on the display 6 is a character image 46 at low temperature level 2 as shown in FIG. 3 (b2). The fact that the figures on both sides of the face are the same and that the expression of the face changes is as shown in FIG.
This is the same as when the temperature rises as shown in (a2).

When the temperature in the housing exceeds a third threshold set near the minimum operating temperature of the information recording / reproducing apparatus 1 based on the temperature detection signal from the temperature sensor 20, the system control unit 7 2 until the temperature of the
It has a function as a protection circuit that cuts off power supply from the next battery 11 to the above functional blocks. The system control unit 7 as a protection circuit prohibits the discharging or charging of the secondary battery 11 when detecting an abnormality in the temperature inside the housing.
After shutting off the power supply to the functional blocks, the system control unit 7
The supply of power to the functional blocks is stopped until the temperature in the housing becomes equal to or higher than the second threshold.

The information recording / reproducing apparatus 1 has a humidity which is surface-mounted on a circuit board in the housing and senses the humidity in the housing, in order to protect the functional block having the above configuration in the housing from dew condensation. It has a sensor 22. Preferably, the humidity sensor is small and lightweight, and more preferably a chip-shaped component.

The humidity detection signal from the humidity sensor 22 is sent to the system controller 7 via a signal line 28. The humidity sensor 22 is a moisture-sensitive element whose resistance increases as the humidity increases. Based on the humidity detection signal from the humidity sensor 22, the system control unit 7 reads out the character image data written in the storage unit 15 when the humidity in the housing exceeds a predetermined threshold, and reads the character image data via the display control unit 5. The character image is displayed on the display 6. The above threshold value is first set near 90% RH (relative humidity) where the risk of dew condensation inside the housing increases, but some other threshold values are also set in a range that does not affect the operation of the functional block.

When the humidity inside the housing rises and exceeds the first threshold value (high humidity level 1), what is displayed on the display 6 is the high humidity level 1 as shown in FIG. Character 4
8 Also, when the value exceeds the second threshold value (high humidity level 2), what is displayed is a character image 50 of high humidity level 2 as shown in FIG. 2 (c2). The figure of two water drops on each side of the face represents the state of sweating and expresses high humidity. Figure 2 shows how facial expressions change
This is the same as when the temperature rises as shown in (a1) and (a2).

Further, the system controller 7 controls the humidity sensor 2
If the humidity inside the housing exceeds the third threshold set at 90% RH at which the risk of dew condensation increases based on the humidity detection signal from 2, the humidity in the housing becomes equal to or lower than the second threshold until the humidity inside the housing becomes equal to or lower than the second threshold. It has a function as a protection circuit that cuts off power supply from the next battery 11 to the above functional blocks. The system control unit 7 as a protection circuit prohibits the discharge or charging of the secondary battery 11 when detecting an abnormality in the humidity inside the housing. Further, after shutting off the power supply to the function block, the system control unit 7 supplies the power to the function block until the humidity in the housing becomes equal to or less than the second threshold based on the humidity detection signal from the humidity sensor 22. Keep stopping.

Further, the information recording / reproducing apparatus 1 is surface-mounted on a circuit board in the housing to protect the functional block having the above structure in the housing from external shocks and vibrations. Has an impact sensor 24 that senses the impact of the vehicle. The impact sensor is preferably small and lightweight,
In particular, chip-like parts are desirable.

The shock detection signal from the shock sensor 24 is sent to the system control unit 7 via the signal line 30. The impact sensor 24 is a piezoelectric element that generates an electric charge when a distortion is generated by receiving an external stress. System control unit 7
Reads the character image data written in the storage unit 15 based on the shock detection signal from the shock sensor 24 and when the shock to the inside of the housing exceeds a predetermined threshold value, and reads the character image data via the display control unit 5 To display the character image. The above-mentioned threshold value is set near a value that may affect the operation of the function block, but some other threshold values are also set in a range that does not affect the operation of the function block.

When the impact into the housing exceeds the first threshold value (impact level 1), what is displayed on the display 6 is as shown in FIG.
The character 52 has an impact level 1 as shown in 1). When the second threshold is exceeded (impact level 2),
What is displayed is the shock level 2 as shown in FIG.
Character 54. The hammer at the top of the face shows that a shock was applied into the housing. The change of the facial expression is the same as that at the time of temperature rise shown in FIGS. 2 (a1) and (a2).

In this embodiment, the system control unit 7
Is displayed at the same time as displaying the character images shown in FIGS. 2 (a1) to 2 (d2) on the display 6, and further displaying characters, symbols, etc. on the display 6 or connected via the input / output terminal 14. It is also possible to output sound from a speaker.

Next, the operation of the information recording / reproducing apparatus 1 according to the present embodiment will be described. First, control switch 1
When a command to turn on the power of the information recording / reproducing apparatus 1 is input by the user operating the secondary battery 6, the secondary battery 1
1 supplies power to each circuit. System control unit 7
Performs error detection and protocol processing of the data signal of the music information of the CD 18 input from the driving device 3, and
The data sent from the CD drive is transmitted to the system controller 7
And a conversion to an electrical interface suitable for the system control unit 7.

The interfaces 4a and 4b perform error detection and protocol processing of the data signal of the music information input from the memory card 2, and control for the memory card 2 to recognize the information recording / reproducing apparatus 1 as a device. Go. At this time, the interfaces 4a, 4b
Converts the data sent from the system control unit 7 into data suitable for the interface on the memory card 2a, 2b side in order to realize a control procedure between the system control unit 7 and the memory cards 2a, 2b. The interfaces 4a and 4b convert data and commands sent from the memory cards 2a and 2b into a format that can be interpreted by the system control unit 7, or convert the data and commands into an electrical interface suitable for the system control unit 7. I do.

When the above-described interface operation is completed, the music data stored in the CD 18 is recorded on one of the solid-state memories of the memory cards 2a and 2b via the system controller 7 and the interfaces 4a and 4b. It becomes possible. The control switch 1 determines which of the memory cards 2a and 2b is used to record data.
6 and the display 6 are set.

When music data from the CD 18 is subjected to data compression processing, the music data input to the system control unit 7 is passed to the DSP 8 for compression processing, and then the memory card is transmitted via the interfaces 4a and 4b. 2
a or 2b. Further, when the music information of the CD 18 is transferred to the memory cards 2a and 2b, the transferred music data can be encrypted by using the system control unit 7. The control when transferring music data between the CD 18 and the memory cards 2a and 2b is performed by the system control unit 7, and the control by the system control unit 7 is started by an instruction from the control switch 16.

Next, a case where music data is input from the input terminal of the input / output terminal 14 and recorded will be described. First, the input analog music data is converted into digital data by the codec 9. If necessary, data compression is performed by the DSP 8 described above, and a CD (hereinafter, referred to as a CD-R) on which data can be written is driven by the driving device 3.
Is controllable through the system control unit 7,
Output music data to R. When recording data on the memory cards 2a and 2b, data compression is performed by the DSP 8 if necessary, and the interfaces 4a and 4b are activated via the system control unit 7 to transfer music to at least one of the memory cards 2a and 2b. Output data.

Next, a case where an earphone or the like is connected to the output terminal of the input / output terminal 14 to reproduce and listen to music will be described. First, in order to reproduce music data recorded on the CD 18 in the CD drive, the music data is input via the drive 3. If the input music data is WAVE data, the music data is converted into analog music data by the codec 9 via the system control unit 7 and output from the output terminal of the input / output terminal 14. When reproducing music data recorded on the memory cards 2a and 2b, the interface 4a,
4b, music data is input. If the input music data is MP3 data, the music data is input to the DSP 8 via the system control unit 7 and subjected to data expansion, then converted into analog music data by the codec 9 and input / output terminal 1
4 output terminal. If the music data recorded on the memory cards 2a and 2b has not been compressed, the decompression process is not performed by the DSP 8, and the music data is directly output from the system control unit 7 to the codec 9.

In the above operation, the system control unit 7
Controls switching of the recording / reproducing mode from the user through the control switch 16 and switching between the recording / reproducing medium of the CD 18 and the memory cards 2a and 2b. Further, the system control unit 7 controls the display control unit 5 to cause the display 6 to appropriately display necessary information according to an instruction from the control switch 16.

During the above operation, when the AC adapter is connected to the external AC adapter input terminal 13, the voltage is applied to the charging circuit 10 and
The secondary battery 11 supplies power to each circuit in the information recording / reproducing apparatus 1 while being charged. In the above operation, the system control unit 7 performs control for switching the recording / reproducing mode from the user through the control switch 16 and switching the recording / reproducing medium to another memory card 2. Further, the system control unit 7 controls the display control unit 5 to cause the display 6 to appropriately display necessary information according to an instruction from the control switch 16. While the above operation is being performed, power is continuously supplied from the secondary battery 11 to each circuit.

In parallel with the above operation, the temperature detection signal from the temperature sensor 20 is sent to the system controller 7 via the signal line 26.
Has been sent to The system control unit 7 includes a temperature sensor 20
Monitoring the change in the resistance value, and if it is determined that the temperature inside the housing has risen and has exceeded the first threshold value (for example, 35 ° C.),
The data of the character image 40 of the high temperature level 1 written in the storage unit 15 is read out, and the display control unit 5 replaces part or all of the normal display contents displayed on the display unit 6, The character image 40 of the high temperature level 1 is displayed on the display 6. If the system control unit 7 determines that the temperature in the housing has further risen and has exceeded the second threshold value (for example, 38 ° C.), the system control unit 7 reads the data of the character image 42 of the high temperature level 2 written in the storage unit 15 as shown in FIG. Are displayed on the display 6 via the display control unit 5. The system control unit 7 displays the third
Is determined to have exceeded the threshold value (for example, 40 ° C.), the power supply from the secondary battery 11 to the above functional blocks is cut off until the temperature inside the housing becomes equal to or lower than the second threshold value (38 ° C.).

Although the above description is for the case where the temperature rises, the same applies to the case where the temperature falls. System control unit 7
Reads out the data of the character image 44 of the low-temperature level 1 written in the storage unit 15 when it is determined that the temperature in the housing has dropped and exceeded the first threshold value (for example, 5 ° C.).
The display controller 6 causes the display 6 to display the character image 44 at the low temperature level 1 instead of part or all of the normal display content displayed on the display 6. If the system control unit 7 determines that the temperature in the housing has further decreased and has exceeded the second threshold value (for example, 2 ° C.), the system control unit 7 reads the data of the character image 46 of the low-temperature level 2 written in the storage unit 15 and displays the data. It is displayed on the display 6 via the control unit 5. If the system control unit 7 determines that the temperature inside the housing has dropped further and has exceeded the third threshold value (for example, 0 ° C.), the secondary battery is controlled until the temperature inside the housing becomes equal to or higher than the second threshold value (2 ° C.). The power supply from 11 to the above function block is cut off.

In parallel with the above operation, a humidity detection signal from the humidity sensor 22 is sent to the system controller 7 via a signal line 28.
Has been sent to The system control unit 7 includes a humidity sensor 22
Is monitored, and if it is determined that the humidity inside the housing has risen and exceeds a first threshold (for example, 80% RH), the character image 48 of the high humidity level 1 written in the storage unit 15 Is read out, and a character image 48 of the high humidity level 1 is displayed on the display 6 via the display control unit 5 in place of part or all of the normal display content displayed on the display 6. . The system control unit 7 determines that the humidity in the housing is further increased and the second threshold value (for example, 85% R
If it is determined that H) has been exceeded, the data of the high humidity level 2 character image 50 written in the storage unit 15 is read and displayed on the display 6 via the display control unit 5. If the system controller 7 determines that the humidity inside the housing has further risen and has exceeded the third threshold value (90% RH), the system control unit 7 performs secondary operation until the humidity inside the housing becomes equal to or less than the second threshold value (85% RH). The power supply from the battery 11 to the above functional block is cut off.

In parallel with the above operation, an impact detection signal from the impact sensor 24 is transmitted to the system controller 7 via the signal line 30.
Has been sent to The system control unit 7 includes an impact sensor 24
And when it is determined that the impact on the housing has exceeded the first threshold value, the data of the character image 52 of the impact level 1 written in the storage unit 15 is read out, and the display control unit 5, a character image 52 of the impact level 1 is displayed on the display 6 instead of a part or all of the normal display contents displayed on the display 6 via the display 5. When the system control unit 7 determines that the impact into the housing has exceeded the second threshold, the system control unit 7 reads the data of the character image 54 of the impact level 2 written in the storage unit 15 and displays the data via the display control unit 5. Let it.

In this embodiment, the system control unit 7
Is displayed at the same time as displaying a character image on the display 6, and further displays characters, symbols, etc. on the display 6, and outputs sound from a speaker connected via the input / output terminal 14. Warn the person.

In the present embodiment, the system control section 7 may switch the displayed character image to the normal display content in accordance with an instruction from the control switch 16, or may display the normal image content after a certain period of time. You may switch to the content.

The portable electronic device according to the present embodiment described above is an example of a music recording / reproducing device. However, other portable electronic devices, for example, portable audio devices for recording / reproducing media other than CDs, For portable personal computers, digital cameras, portable radios, portable televisions, and other mobile communication devices such as mobile phones, PHSs, and portable information terminals, temperature sensors 20, humidity sensors 22, and impact sensors 24 are also provided in the housing.
Can be arranged to have the same configuration as in the above embodiment.

When a mobile communication device such as a portable telephone, a PHS, a portable information terminal or the like has the same configuration as that of the above-described embodiment, a method of alerting a user when a character image is displayed is as follows. In addition to the above warning, it is also possible to warn by vibration with a vibrator.

In the above embodiment, the secondary battery 11
Is fixed in the information recording / reproducing device 1, but the secondary battery 11 may be removably mounted. 2
When the secondary battery 11 is made removable, the spare secondary battery 11 can be charged using an external AC adapter and a charger.

Further, a dry battery can be used instead of the secondary battery 11. However, in order to use the rechargeable battery 11 and the dry cell together, the charging circuit 1 must be used when the dry cell is used.
It is desirable to provide a mechanism for stopping the zero charging function.

The temperature sensor 2 used in the above embodiment
Numeral 0 denotes an NTC thermistor whose resistance value decreases with an increase in temperature, but an inorganic ceramic or organic polymer PTC thermistor whose resistance value increases with an increase in temperature may be used.

The resistance value of the humidity sensor 22 used in the above embodiment increases as the humidity increases.
This is a moisture-sensitive element that can detect the humidity in the range of １００100% RH. For the moisture-sensitive element, for example, a device equipped with a moisture-sensitive film in which conductive particles are dispersed in a hygroscopic polymer or a polymer electrolyte having a quaternary ammonium base is used to utilize the change in ionic conductivity. There are things to do. A humidity sensor other than the humidity sensing element may be used.

The shock sensor 24 used in the above embodiment is a piezoelectric element that generates an electric charge when it is distorted by an external stress, but other shock sensors may be used. .

In the above embodiment, the first threshold among the thresholds set for the temperature, the humidity and the impact does not affect the operation of the functional block, and may be freely changed by the user. . However, the second and third threshold values for temperature and humidity, and the second threshold value for impact must not be changed by the user because it may affect the operation of the functional block.

In the above embodiment, the character image data is stored in the storage unit 15 in the manufacturing stage of the information recording / reproducing apparatus 1.
May be newly written by the user, such as those obtained through a telecommunication line. In this case, the effect of the warning can be further expected by displaying the user's favorite character image.

[0064]

As described above, according to the present invention, a functional block for providing a predetermined function is less likely to fail due to abnormal fluctuations in temperature and humidity in the housing, shock to the housing, and the like. Electronic devices can be realized. Further, according to the present invention, it is possible to realize a portable electronic device in which a user can easily and reliably know the state of the device under various environments.

[Brief description of the drawings]

FIG. 1 is a system block diagram showing a schematic configuration of a portable electronic device according to an embodiment of the present invention.

FIG. 2 is a diagram showing an example of a display screen of the portable electronic device according to the embodiment of the present invention.

[Explanation of symbols]

 Reference Signs List 1 information recording / reproducing device 2a, 2b memory card 3 driving device 4a, 4b interface 5 display control unit 6 display 7 system control unit 8 DSP 9 codec 10 charging circuit 11 secondary battery 12 booster circuit 13 external AC adapter terminal 14 input Output terminal 16 Control switch 18 CD 20 Temperature sensor 22 Humidity sensor 24 Shock sensor 26, 28, 30 Signal line 40 High temperature level 1 character image 42 High temperature level 2 character image 44 Low temperature level 1 character image 46 Low temperature level 2 character Image 48 High humidity level 1 character image 50 High humidity level 2 character image 52 Impact level 1 character image 54 Impact level 2 character image

 ──────────────────────────────────────────────────続 き Continued on front page F term (reference) 2G046 AA09 AA32 BF05 CA09 DC09 DC14 DC16 DC17 DC18 DD02 FA01 FB00 FC06 2G060 AA01 AB02 AC01 AE19 AF07 BB09 BB10 BD10 FA03 FA05 HA01 HC07 HC10 HC15 HC19 HE03 5K027 AA11 BB04 CC08 FF08 HH00 LL00 MM17

Claims (8)

[Claims] 1. A portable electronic device which has a built-in power supply and is portable so that it can be taken out of the room. The functional block provides a predetermined function by supplying power from the power supply, and protects the functional block. Provided in the housing for
A sensor unit that detects a state in the housing and outputs a state detection signal; a storage unit that stores character image data representing a specific state in the housing; and the character from the storage unit based on the detection signal. A portable electronic device comprising: a control unit that reads out image data and generates a display signal; and a display unit that displays a character image based on the display signal. 2. The portable electronic device according to claim 1, wherein the sensor unit detects a temperature in the housing and outputs a temperature detection signal, and detects a humidity in the housing. A portable electronic device comprising one of a humidity sensor that outputs a humidity detection signal and an impact sensor that detects an impact into the housing and outputs an impact detection signal. 3. The portable electronic device according to claim 1, wherein the sensor unit detects a temperature in the housing and outputs a temperature detection signal, and detects a humidity in the housing. A portable electronic device comprising at least two of a humidity sensor that outputs a humidity detection signal and an impact sensor that detects an impact into the housing and outputs an impact detection signal. 4. The portable electronic device according to claim 3, wherein:
The portable electronic device, wherein the storage unit has the character image data different for each sensor. 5. The portable electronic device according to claim 2, wherein, when the sensor unit has a temperature sensor, the control unit is configured to perform the operation based on the temperature detection signal. When the temperature in the housing exceeds a predetermined threshold, the character image data representing the temperature state is read from the recording unit to generate the display signal, and the display unit displays the character image, and the sensor unit When a humidity sensor is provided, the control unit reads the character image data representing the humidity state from the recording unit when the humidity in the housing exceeds a predetermined threshold based on the humidity detection signal, and displays the character image data. A signal is generated, the character image is displayed on the display unit, and when the sensor unit has an impact sensor, the control unit is configured to control the inside of the housing based on the impact detection signal. The portable electronic device according to claim 1, wherein when the impact exceeds a predetermined threshold, the character image data representing the impact state is read from the recording unit to generate the display signal, and the character image is displayed on the display unit. machine. 6. The portable electronic device according to claim 2, wherein, when the sensor unit has a temperature sensor, the control unit is configured to perform the operation based on the temperature detection signal. When the temperature in the housing exceeds a predetermined threshold, power supply from the power supply to the functional block is shut off until the temperature in the housing becomes equal to or lower than a predetermined threshold, and when the sensor unit has a humidity sensor, When the humidity in the housing exceeds 90% RH based on the humidity detection signal, the control unit supplies power from the power supply to the functional block until the humidity in the housing becomes a predetermined threshold or less. A portable electronic device characterized by shutting off light. 7. The portable electronic device according to claim 1, further comprising: a warning unit that issues a warning almost simultaneously with displaying the character image on the display unit. A portable electronic device characterized by the above-mentioned. 8. The portable electronic device according to claim 1, wherein said functional block has a mobile communication function.