JP6505394B2 - Portable biometric information acquisition apparatus and control method thereof - Google Patents

Description

  The present invention relates to a portable biometric information acquisition apparatus and a control method thereof, and more particularly to a portable biometric information acquisition apparatus including a self-luminous display device and a control method thereof.

  Conventionally, biological information represented by an electrocardiogram is widely used as useful information for diagnosis. The measurement of biological information is generally performed in a medical institution for a short period (about several seconds to 10 minutes) and using a stationary device, so the device is relatively large. However, when a short-term measurement can not make a sufficient diagnosis, for example, biological information may be measured continuously for several hours to one day or more, and a portable device is used. For example, a Holter electrocardiograph is known as such a portable biological information acquisition apparatus.

  Some Holter electrocardiographs are provided with a small dot matrix display device, and are used for display of time, waveform display for confirming whether measurement is correctly performed, and the like. This type of display device is roughly divided into non-light emitting display devices such as liquid crystal displays and self-emitting display devices such as organic EL displays, but with emphasis on visibility, it is provided with a self-emitting display device Are known (Non-Patent Document 1).

  Self-luminous display devices have high visibility and high luminance and contrast compared to non-luminous display devices, (2) hard to see even in bright environments, and (3) viewed from an oblique direction There is an advantage that the decrease in visibility in the case is small. Therefore, it is suitable as a display device of the Holter electrocardiograph used in various environments. However, on the other hand, there is a problem that power consumption is larger than that of the non-light emitting display device and so-called "burn-in" occurs.

  A portable biological information acquiring apparatus having a self-luminous display device shifts to a night mode in which the display brightness is reduced compared to the normal display, and suppresses glare if the time of the built-in clock is a preset night time. Together with the reduction of power consumption.

“Holta Recorder FM-960”, [online], [search August 13, 2014], Internet <URL: http://www.fukuda.co.jp/medical/products/holter_ecg/fm_960.html>

  The conventional portable biometric information acquisition apparatus operates in the night mode if the time of the built-in clock corresponds to the night time preset in the apparatus, and operates in the normal mode if it does not correspond. Therefore, even if the subject wakes up at the time set for the night time and performs an operation, the night mode is not released. For example, in the measurement using a Holta electrocardiograph, it is necessary to record the wake-up time, but when operating at the time of wake-up, if the night mode is not canceled, the display brightness remains low and the time of the built-in clock of the device is confirmed. It is difficult. This is especially true in the dark surroundings, such as when the wake time is early or when the sunrise is late.

  As described above, in the conventional portable biometric information acquisition apparatus, there is a problem that the usability is deteriorated when the living pattern of the subject and the night time set in the apparatus do not correspond. Although it may be considered to change the setting of the night time depending on the subject, it is not an essential solution because it does not always wake up at the set time. In addition, when the night time is set short as in the normal mode when waking up, the time to operate in the normal mode becomes longer than necessary, which may cause the battery to run out during the measurement.

  The present invention has been made in view of the problems of the prior art as described above, and achieves both efficient reduction of power consumption and good usability in a portable biological information acquiring apparatus provided with a self-luminous display device. The purpose is

  The above-mentioned object is a portable biometric information acquisition apparatus having a self-luminous display device, an attitude sensor, and a control means for controlling the display device, wherein the control means outputs the current time and the attitude sensor Therefore, when it is determined that the subject wearing the portable biometric information acquisition apparatus has gone to bed, the display brightness of the display device can be reduced more than when it is not determined that the subject has gone to bed This is achieved by the portable biometric information acquisition device characterized by the above.

  With such a configuration, according to the present invention, it is possible to achieve both efficient reduction of power consumption and good usability in a portable biometric information acquiring apparatus provided with a self-luminous display device.

It is a block diagram showing an example of functional composition of a Holta electrocardiograph as an example of a portable type living body information acquisition device concerning an embodiment of the present invention. It is a perspective view which shows the example of an external appearance of the Holter electrocardiograph which concerns on embodiment. It is a flowchart for demonstrating the setting operation of the display mode in the Holter electrocardiograph which concerns on embodiment. It is a figure which shows typically the example of a display of the screensaver mode in the Holter electrocardiograph which concerns on embodiment. It is a transition diagram of the display mode in the Holter electrocardiograph which concerns on embodiment. It is a flowchart for demonstrating the setting operation of the display mode in the Holter electrocardiograph which concerns on the modification of embodiment.

  Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the drawings. In the following, an embodiment in which the present invention is applied to a Holter electrocardiograph as an example of a portable biological information acquisition device having a self-emission display device will be described. However, the present invention is applicable to any biological information acquisition device regardless of the type of biological information to be acquired.

FIG. 1 is a block diagram showing an example of the functional configuration of the Holter electrocardiograph 100. As shown in FIG.
In FIG. 1, the CPU 1 controls the entire Holter electrocardiograph by reading a control program stored in the ROM 2 into the RAM 3 and executing the control program. The ROM 2 is a non-volatile memory for storing a program to be executed by the CPU 1, GUI data for displaying a menu screen, etc., user setting data, initial setting data, etc., parameters necessary for processing, etc. It may be.

  The RAM 3 is used as an area for developing a program to be executed by the CPU 1 or as a temporary storage area for variables and data. The memory card 4 is a storage device for storing, in the form of digital data, biological information input from the biological electrode 11, that is, a biological electric signal itself, or other biological information or data obtained by processing the biological electric signal. Memory card 4 is detachably attached to card slot 5. Although the configuration using the removable memory card 4 as a recording medium has been described here, a configuration using a non-volatile internal memory may be used.

  The display unit 6 is a dot matrix type self-luminous display device, and is, for example, an organic EL display. The display unit 6 is used to display a waveform of a bioelectric signal during measurement or recorded in the memory card 4, and display a GUI screen such as a menu screen for setting the Holter electrocardiograph 100 and various messages.

  The operation unit 8 includes switches, buttons, and the like for performing power on / off, measurement start / stop, various event inputs, and various settings. When the display unit 6 is a touch display, the operation unit 8 includes a touch panel provided on the display unit 6.

An analog-to-digital converter (A / D converter) 9 converts an analog bioelectric signal input from the biological electrode 11 into a digital bioelectric signal. The sensor I / F 10 is an interface for connecting the living body electrode 11. The sensor I / F 10 may be equipped with a connector to which an SpO ₂ (arterial blood oxygen saturation) sensor, a cuff for blood pressure and pulse wave measurement, and the like can be connected in addition to the biological electrode 11.

  The biological electrode 11 is an electrode for acquiring a bioelectric signal, and in this embodiment, is an electrode for detecting, for example, a monopolar or bipolar two-channel electrocardiogram. The biological electrode 11 has an electrode part mounted on a living body, a connector part for connecting to the sensor I / F 10, and a lead wire part for connecting the electrode part and the connector part.

  The posture sensor 12 is a sensor that detects the posture of the Holter electrocardiograph 100, and may be, for example, a 3-axis acceleration sensor. The posture sensor 12 is mounted to have a specific positional relationship with respect to the housing of the Holter electrocardiograph 100, and the posture of the Holter electrocardiograph 100 can be specified from its output. Therefore, by attaching the Holta electrocardiograph 100 to the subject so that the posture of the Holta electrocardiograph 100 corresponds to the posture of the subject, the body position of the subject (for example, the right recumbent position, the left masticatory position, Position, supine position, prone position, and standing position). The standing position does not necessarily mean the upright state, and it is only necessary that the part to which the Holter electrocardiograph 100 is attached be in the standing position, such as a state in which the upper body is raised.

  FIG. 2 is a perspective view showing an example of the appearance of the Holter electrocardiograph 100. As shown in FIG. In this manner, a state in which characters (logo, model number) and the like printed on the periphery of the display unit can be read correctly with the display unit 6 substantially vertical is referred to as “standing position” (reference posture). Determine the posture.

  The communication interface 20 is, for example, a communication interface for communicating with an external device 40 such as a host computer or a printer, and has a configuration conforming to a wired and / or wireless communication standard.

  The clock 13 is a general built-in clock, and the CPU 1 can acquire the current time from the clock 13. The current time can also be acquired from the external device 40 through the communication I / F 20.

  When acquisition and recording of an electrocardiogram (lead waveform) are performed using the Holta electrocardiograph 100 having such a configuration, the Holter heart is placed on the chest or waist of the subject using the mounting tool that houses the Holta electrocardiograph 100. The electrometer 100 is held. Then, the connector portion of the biological electrode 11 is connected to the connector of the sensor I / F 10, and the electrode portion of the biological electrode 11 is attached to a predetermined position on the body surface.

  For example, when the power is turned on by the operation of the operation unit 8, the CPU 1 performs setting processing of an operation mode for acquiring an electrocardiogram waveform at timing before starting acquisition of a bioelectric signal such as initialization processing. Can.

In addition, before starting the recording operation of the bioelectric signal, the CPU 1 displays an input screen and the like for allowing the user to set the date and time (for example, patient ID etc.) which can identify the subject before starting the recording operation You may Then, the CPU 1 starts the recording operation of the bioelectric signal, for example, in response to the input of the recording start instruction from the operation unit 8 or the elapse of a predetermined time from the time the power is turned on. Note that acquisition of the bioelectric signal itself may be performed before the start of the recording process. For example, by displaying the waveform of the bioelectric signal currently being acquired on the display unit 6, it is possible to confirm the connection state including whether the biological electrode is properly attached.
Note that the recording operation of the bioelectric signal is not directly related to the present invention, and may be the same as the conventional one, and therefore the description thereof will be omitted.

  Next, transition processing of the operation mode according to display control of the Holter electrocardiograph 100 in the present embodiment will be described using the flowchart shown in FIG. This process is performed mainly by the CPU 1. The following operations are performed regardless of whether the recording operation is being performed in parallel.

  In S101, the CPU 1 acquires the current time from the clock 13, and determines, for example, whether it corresponds to the night time preset in the ROM 2. The night time may be, for example, 9 am to 7 am. If the current time does not correspond to the night time, the CPU 1 advances the process to S107 and sets the normal display mode. The normal display mode is a mode in which display is performed with preset normal brightness, and brightness that is easy to see even in a bright environment such as daytime is set.

  On the other hand, when the current time corresponds to the night time, the CPU 1 advances the process to S103, and determines from the output of the posture sensor 12 whether the body position of the subject is standing or standing other than standing. As described above, in the normal wearing state, since the posture of the Holter electrocardiograph 100 matches the posture of the subject, the CPU 1 determines the output of the Holter electrocardiograph 100 determined from the output of the posture sensor 12. The posture is determined as the posture of the subject. In addition, since the method to discriminate | determine an attitude | position from the output of a 3-axis acceleration sensor is well-known, description about details is abbreviate | omitted.

  If it is determined in S103 that the posture of the subject is standing, the CPU 1 advances the process to S107 and sets the normal display mode. On the other hand, if it is determined that the posture of the subject is a posture other than standing, the CPU 1 advances the process to S105 and sets the sleep display mode. The sleeping display mode is a mode in which the display brightness is lower than that of the normal display mode. By setting the bedtime display mode, the glare of the display at bedtime can be reduced and the consumption of the battery can be suppressed.

  In addition, the combination of the discrimination | determination process of S101 and S103 is corresponded to the determination process of whether to-be-tested person is going to bed. That is, when it is determined that the subject has gone to bed, a display mode with display luminance lower than that of the normal display mode is set. If the posture of the subject is standing even if the current time is night time, it is determined that the user has not gone to bed and the normal display mode is maintained.

  In S109, the CPU 1 determines whether a predetermined time (for example, 30 seconds) has elapsed without performing an operation on the operation unit 8, and if it is determined that the predetermined time has elapsed in the non-operation state, the process proceeds to S111, and the predetermined time If it is determined that the time has not elapsed, the process returns to S101.

  In S111, the CPU 1 sets the screen saver mode (executes the screen saver operation). In the screen saver mode, the display area (pixels to be used) is reduced compared to the normal display by not using pixels other than the pixels related to the display of the specific pattern among the plurality of pixels of the display unit 6. This is a display mode that realizes reduction of power consumption. It is also a display mode that realizes burn-in prevention of the self-luminous display device by sequentially changing the display position of a specific pattern.

  FIG. 4 schematically shows an example of the display operation in the screen saver mode, and the time has elapsed from FIG. 4 (a) to FIG. 4 (c). In the present embodiment, the CPU 1 executes the combination of the two displays in the screen saver mode.

  FIG. 4 shows an example in which the time 30 in a digital format and the rod-like object 31 are displayed while changing the display position. Since the time 30 is blinking display, it is displayed at the timings of FIG. 4A and FIG. 4C, but is not displayed at the timing of FIG. 4B. There is no particular limitation on the blinking cycle, but for example, 1 second of display and 2 seconds of non-display can be alternately repeated. By blinking the display position while changing the display position at random or evenly in the screen, the frequency of use of the pixel is not biased, and "burn-in" that the deterioration of a specific pixel progresses is prevented doing.

  On the other hand, the object 31 is also displayed during the non-display period of time 30 so that the entire surface of the display unit 6 is not turned off. This is because if the entire surface of the display unit 6 is turned off, the subject may misunderstand that the battery has run out or a device failure. Therefore, the CPU 1 displays the object 31 continuously or blinks so that the non-display period and the display period are reversed with the time 30.

  The CPU 1 sequentially changes the display position of the object 31 as in the case of the display of the time 30, but the display ranges of the object 31 overlap so that the object 31 is viewed as if it moves continuously. Change the display position to. This is because the object 31 is small, and when the display position is discretely changed, depending on the display position, the display of the object 31 may be difficult to notice or may be bothersome. Since the display period of the object 31 is longer than that of the time 30, when the display range is large (the number of light emitting pixels is large), the influence on the power consumption can not be ignored. Therefore, a smaller display range is desirable. In order to make a small object recognized, it is effective that motion appears to be present, and if the position is changed discretely, the problem described above may occur, so that the object 31 moves continuously. Display.

  Although the display position of the object 31 is not particularly limited, an area used to display the object 31 can be determined based on the frequency used for display other than the screen saver. Specifically, it is preferable to perform display using an area with a low frequency of use for display other than the screen saver in order to suppress deterioration in display image quality of the display unit 6 which is a self-luminous display device. It is possible to determine which region is used to display the object 31 based on the display pattern, screen design, and the like for the display unit 6. In the example of FIG. 4, since the area with the lowest frequency used for display other than the screen saver is the bottom line of the display unit 6, the object 31 is displayed using the bottom line.

  As described above, in the screen saver mode, most of the pixels do not emit light, so that the power consumption by the display unit 6 can be significantly suppressed. In addition, when the sleeping display mode is set, the brightness of the screen saver display is also low, so that a further power saving effect can be realized. Note that the screen saver display may include at least a movement pattern continuously displayed, that is, the display of the object 31 in the above-described example. The display of the time 30 in the above example is not essential.

  Returning to FIG. 3, when the operation on the operation unit 8 is performed in the screen saver mode (S113, Y), the CPU 1 cancels the screen saver mode (stops the screen saver operation), and returns the process to S101. As a result, the display content of the display unit 6 returns to the normal display. After returning, the display is performed with the luminance according to the display mode set in S105 or S107 according to the current time and the posture of the subject. Therefore, when the operation unit 8 is operated in the standing position, display with normal brightness is performed regardless of whether the current time is night time or not.

  On the other hand, when the operation to the operation unit 8 is not performed in the screen saver mode, the CPU 1 maintains the screen saver mode and continues the screen saver display. The above control operation is shown in a transition diagram as shown in FIG.

  In the past, it was determined whether to set the bedtime display mode only by the comparison result between the current time and the nighttime performed in S101, so even if you do not go to bed, you can go to bedtime display mode or get up and get up If it is night time, it may remain in the sleep display mode, and the display may be difficult to see. On the other hand, in the present embodiment, in order to set and release the sleeping display mode (return to the standard display mode) in consideration of the physical position of the subject, the display mode according to the actual behavior of the subject is It can be set while suppressing the power consumption.

(Modification)
In the above-described embodiment, the case has been described in which only the bedtime display mode is used as a mode (low brightness display mode) in which the display brightness is lower than the normal display mode. However, it is possible to set a plurality of low brightness display modes, such as setting a nighttime display mode in which the brightness is higher than the sleeping display mode and the brightness is lower than the normal display mode. In this case, as shown in the flowchart of FIG. 6, for example, when the body position of the subject is standing at night time, the nighttime display mode can be set (S106).

  When the operation unit 8 is operated in the screen saver mode (S113, Y), the CPU 1 cancels the screen saver mode and returns the process to S101. Thereby, when the operation is performed in the standing position, if the current time is the night time, the display returns to the middle brightness display in the night time display mode, and if the current time is not the night time, the brightness in the normal display mode regardless of the posture Return to the display of.

  In such a modification, it is possible to reduce the glare of the display at the time of non-sleeping at night and to suppress the power consumption. In addition, when the operation unit 8 is operated in the standing position at night time, by setting the night-time display mode of medium brightness, the power consumption is suppressed while making the display easier to view than the low-brightness bedtime display mode be able to.

  As described above, according to the present embodiment, by controlling the display luminance in consideration of the physical position of the subject in addition to the time, suppression of power consumption by the self-luminous display device and the subject's It becomes possible to make compatible with usability. In addition, when the no-operation state continues for a predetermined time, power consumption can be further suppressed by switching to a display mode in which the number of light emitting pixels is smaller than that in the normal display. At this time, by including at least a continuously displayed movement pattern, it is possible to notify the subject that the device is operating.

Claims (10)

A self-luminous display device,
Attitude sensor,
A portable biometric information acquisition apparatus, comprising: control means for controlling the display device;
When it is determined from the current time and the output of the posture sensor that the subject wearing the portable biological information acquisition apparatus has gone to bed, the control means goes to bed A portable biometric information acquiring apparatus characterized in that the display brightness of the display device is reduced more than in the case where it is not determined.   The control means determines that the subject has gone to bed when it is determined that the current time corresponds to a preset time and the physical position of the subject is not standing from the output of the posture sensor. The portable biometric information acquisition apparatus according to claim 1, wherein The control means
When the current time corresponds to a preset time and it is determined from the output of the posture sensor that the body position of the subject is standing, the display brightness of the display device is the current time The first display brightness lower than that in the case where the preset time does not apply,
When it is determined that the subject has gone to bed, the display brightness of the display device is reduced to a second display brightness lower than the first display brightness.
The portable biological information acquisition apparatus according to claim 1, characterized in that. The control means reduces the display brightness of the display device, and if it is determined from the output of the posture sensor that the body position of the subject is standing, the display brightness is determined regardless of the current time. The portable biometric information acquisition apparatus according to claim 2 or 3 , wherein the display brightness is restored to the display brightness when the current time does not correspond to the preset time. It further has an operation means,
A display mode in which the control means does not use other than the pixels related to the display of a specific pattern among the plurality of pixels of the display device when it is determined that the predetermined time has elapsed without performing the operation on the operation means The portable biometric information acquisition device according to any one of claims 1 to 4, wherein   The portable biological information acquiring apparatus according to claim 5, wherein the control means displays the specific pattern on the display device while changing the display position in the display mode.   7. The portable biometric information acquiring apparatus according to claim 6, wherein the control means continuously changes the display position of the specific pattern.   The control method according to any one of claims 5 to 7, wherein the control means cancels the setting of the display mode when the operation means is operated while the display mode is set. Portable biometric information acquisition device. When the operation mode is performed while the display mode is set, and it is determined from the output of the posture sensor that the body position of the subject is standing, the control means performs the display mode. The method according to any one of claims 2 to 4 , wherein the setting of the display brightness is canceled and the display brightness is returned to the display brightness when the current time does not correspond to the preset time. The portable biometric information acquisition device according to any one of claims 5 to 8. A control method of a portable biometric information acquisition device having a self-luminous display device and a posture sensor,
If it is determined from the current time and the output of the posture sensor that the subject wearing the portable biometric information acquisition apparatus has gone to bed, it is from the case where it is not determined that the subject has gone to bed The control method of the portable biometric information acquiring apparatus, further comprising the step of reducing the display brightness of the display device.