JP3807397B2 - Electronic equipment with posture detection function - Google Patents

Description

  The present invention relates to an electronic device having a posture detection function.

Portable electronic devices using liquid crystal display devices are easy to see by daylight in the daytime, but it is difficult to see the display device at night or in dark places. There is something that is. The lighting device is turned on or off when the user operates the lighting switch.
However, when you want to turn on the lighting device, the surroundings are dark, such as at night. There was a problem such as doing.

Therefore, a light source that illuminates the electronic display element, an automatic switch such as an attitude switch and an inertia switch, and a photoelectric element that detects external brightness are provided, and the light source is turned on and the photoelectric element is externally bright. An electronic display clock that emits light only when it is detected that it is below a certain level is considered.
In such a watch, it is difficult to set the reference level for emitting the light source, and the reference level may fluctuate due to the battery voltage, etc., and the light source may emit light when it is bright or may not emit light although it is dark. There is a problem of being bad.
JP-A-53-86258

  The subject of this invention is providing the electronic device which has the attitude | position detection function which can turn on illumination automatically when illumination is required.

In order to solve the above problems, an electronic apparatus having an attitude detection function of the present invention includes a display means for displaying information, an illumination means for illuminating the display means, an attitude detection means for detecting the attitude of the equipment, and the attitude A switch for designating validity / invalidity of the lighting operation of the illumination means when a predetermined posture is detected by the detection means, and a storage means for storing data indicating whether the designation by the switch is valid or invalid When the posture detecting means detects a predetermined posture, if the data indicating validity is stored in the storage means, the lighting drive control means for turning on the lighting means and the switch is designated as valid After that, there is provided invalidity control means for storing data indicating invalidity in the storage means after a predetermined time and invalidating the lighting operation based on the data indicating invalidity .

  According to the present invention, when lighting is turned on or off according to the attitude of the device, the user can control whether or not the lighting is turned on. Thus, an electronic device having a posture detection function that is easier to use can be realized.

Embodiments of the present invention will be described with reference to the drawings.
FIG. 1 is an external view of a digital electronic wristwatch 1 (hereinafter referred to as a wristwatch 1) having an attitude detection function.

  The wristwatch 1 includes a case 2, a liquid crystal display unit 3 that digitally displays the date and time, and a posture detection switch 4 that detects the tilt of the wristwatch 1 body. Although not shown, an illumination device made of electroluminescence or the like is provided on the back side of the liquid crystal display unit 3. Also, two switches S3 and S4 are provided on the surface of the case 2, and three switches S1, S2 and S5 are provided on the side surface.

  The switch S1 is a mode switch operated when switching the operation mode, and the switch S2 is a switch for switching between an EL auto-off mode for automatically turning off the illumination and an EL auto-on mode for automatically turning on the illumination. . Further, the switch S3 is a switch for manually turning on the illumination, and the switches S4 and S5 are switches for time correction and the like.

  FIG. 2 is a circuit block diagram of the wristwatch 1. In the figure, the clock signal generated by the oscillator 11 is frequency-divided into a clock signal having a predetermined frequency by the frequency dividing circuit 12 and output to the CPU 13. The CPU 13 executes timekeeping processing, illumination control processing, and the like according to the control program stored in the ROM 14 and stores the processing result in the RAM 15. The CPU 13 receives a key operation signal output from the key input unit 16 including the switches S1 to S5 and a posture detection signal of the posture detection switch 4. Further, the CPU 13 turns on or off the driver 17 according to the attitude detection signal of the attitude detection switch 4 to turn on or off the lighting device 18 and drives the display driver 19 to display the current time on the liquid crystal display unit 3. Alternatively, the stopwatch measurement time or the like is displayed. Further, when the current time coincides with the set alarm time, the CPU 13 drives the speaker 20 to report an alarm sound.

  Next, FIG. 3 is a diagram showing the configuration of the register of the RAM 15. The RAM 15 includes a display register 31 for storing display data to be displayed on the liquid crystal display unit 3, a current time register 32 for storing timed date and time data, and an elapsed time since the illumination is automatically turned on. A 3-hour timer 33 for measuring, an alarm time register 34 for storing a set alarm time, a stopwatch register 35 for storing a stopwatch measurement time, and a predetermined posture state continues for a certain time (for example, 2 seconds). There are provided a number register 36 for storing the number of times, a cumulative time register 37 for storing a cumulative value of a time during which a predetermined posture has continued, and a two-second timer 38 used for timing two seconds. Yes.

In addition, a mode register M for storing a numerical value corresponding to the operation mode, a register N ₀ for storing information indicating whether illumination is automatically turned on or automatically turned off, and a register N ₀ A register N ₁ for temporarily storing the contents, a flag F indicating whether or not stopwatch measurement is being performed, and a flag G indicating whether or not the illumination device 18 is being lit are provided.

In the mode register M, “0” is stored when the operation mode is the clock mode, “1” is stored when the operation mode is the stopwatch measurement mode, and “2” is stored when the operation mode is the alarm setting mode. The register N ₀ stores “0” when the illumination is set to be automatically turned off, and “1” is stored when the illumination is set to be automatically turned on. . Further, the flag F is set to “1” when the stopwatch measurement is being performed, and “0” when the measurement is stopped, and the flag G is set to “1” when the lighting device 18 is lit. In this case, “0” is set.

  Further, the liquid crystal display unit 3 includes display segments as shown in FIG. 4. For example, during stopwatch measurement, the lap time is displayed on the upper part of the liquid crystal display unit 3, and the stopwatch measurement time is displayed on the lower part. The Further, when the mode is set to automatically turn on or off the illumination device 18, the EL auto display mark 3a is lit to notify the user.

  Next, a specific structure of the posture detection switch 4 will be described with reference to cross-sectional views of FIGS. FIG. 5 is a diagram showing a cross section of the dial of the wristwatch 1 in the 12 o'clock direction, and FIG. 6 is a diagram showing a cross section in a direction orthogonal to the dial. FIG. 7 is a view showing a cross section when the posture detection switch 4 is in an ON state.

  The posture detection switch 4 is arranged so that the left side surface of the housing 41 in FIG. A second fixed contact 43 extending in the 12 o'clock direction is provided on the upper side inside the housing 41, and a first fixed contact 42 extending in the 6 o'clock direction is provided on the lower side in the housing 41. One end 42a of the first fixed contact 42 at a position opposite to the fixed contact 43 is inclined toward the direction approaching the second fixed contact 43 (upward direction in FIG. 5) as shown in FIG. Yes.

  Furthermore, conductive ball members 44a and 44b are movably accommodated inside the housing 41, and the diameter of the conductive ball members 44a and 44b is the first portion of the portion where the second fixed contact 42 is not inclined. The end 42a of the first fixed contact 42 which is smaller than the distance between the fixed contact 42 and the second fixed contact 43 and is inclined upward, and the second fixed contact 43 thereabove. It is larger than the distance between.

  6 is a cross-sectional view taken along the line AA in FIG. As shown in the figure, the bottom surface inside the housing 41 has an inclined surface 41b inclined toward the direction of the first fixed contact 42 in the center, and a conductive ball member 44a housed inside the housing 41. 44b, the conductive ball members 44a and 44b are always stabilized between the first fixed contact 42 and the second fixed contact 43.

  FIG. 7 is a view showing a cross section when the arm is tilted forward to see the dial of the wristwatch 1 and the posture detection switch 4 is turned on. At this time, the conductive ball member 44 a comes into contact with the end portion 42 a of the first fixed contact 42 and the second fixed contact 43, and the first fixed contact 42 and the second fixed contact 43 are electrically connected. By detecting the on / off of the posture detection switch 4, it is possible to detect whether or not the user has tilted his / her arm in front of the liquid crystal display unit 3 of the watch.

  Next, the operation of the embodiment configured as described above will be described with reference to the flowcharts of FIGS. The CPU 13 is normally in the halt state at step S0 in FIG. 8, and when the timing is reached, the CPU 13 proceeds to the timing process at step S2 and proceeds to the key process at step S1 for detecting key input.

Here, the contents of the key processing in step S1 will be described with reference to the flowchart of FIG. First, in step S31 of FIG. 9, it is determined whether or not the operated key is the S1 key. If it is determined that the operated key is the S1 key (S31, YES), the process proceeds to step S32, and the value of the mode register M is incremented by “1”. Then, in the next step S33, it is determined whether or not the value of the mode register M is “1”, that is, whether or not the current operation mode is the stopwatch mode. If it is determined that the stopwatch mode M = 1 in this determination, setting "1" the content of the register N ₀ proceeds to step S34 and transfers to the register N _1, the register N ₀ in the next step S35 Then, the EL auto mode for automatically turning on the lighting device 18 is set.

As a result of switching the mode in the above processing, when M = 1, “1” is set in the register N ₀ and the EL auto mode is set to automatically turn on the illumination based on the detection result of the attitude detection switch 4. Is set. At this time, the contents stored in the register N ₀ are saved in the register N _1, and the contents are returned to the register N ₀ when exiting the stopwatch mode by a process described later.

If it is determined in step S33 that the value of the mode register M is not “1”, the process proceeds to step S36, where the value of the mode register M is “2”, that is, the current operation mode is the alarm setting mode. It is determined whether or not. When this is judged alarm setting mode of M = 2 in the determination is to return the information which had been evacuated in the register N ₁ proceeds to step S37 to the original register N _0.

On the other hand, if it is determined in step S31 that the S1 key is not operated, the process proceeds to step S38, and it is determined whether or not the S2 key is operated. If it is determined that the operation is an operation of the S2 key, it is determined whether or not the value of the mode register M is “0” in the next step S39, and when M = 0 is determined, that is, M if = 0 S2 key in the clock mode is operated, by inverting the value of the register N ₀ the process proceeds to step S40, further clears the 3 hours timer 33 in the next step S41.

  On the other hand, if it is determined in step S39 that the value of the mode register M is M ≠ 0, the process proceeds to step S42, whether the value of the mode register M is “1”, that is, the stopwatch mode where M = 1. Whether or not the S2 key has been operated is determined. If it is determined that M = 1, the flag F is inverted in the next step S43.

  That is, in the stopwatch mode with M = 1, the stopwatch measurement can be started or stopped by operating the S2 key. If it is determined in step S38 that the operated key is not the S2 key, the process proceeds to step S44 to determine whether or not the S3 key is operated. If it is determined that the S3 key is operated in this determination, the flag G is set to “1” and the lighting device 18 is turned on.

  If it is determined in step S44 that the operated key is not the S3 key, the S4 key, the S5 key, or the like is operated. In this case, another key process in step S46 is performed. Execute.

  Here, switching of the operation mode when the S1 key is operated will be described with reference to FIG. First, when the S1 key is operated in the clock mode for displaying the date and the current time (FIG. 10, (a)), the mode is switched to the stopwatch mode shown in FIG. When the S2 key is operated in the stopwatch mode, the measurement of the stopwatch time is started or stopped.

  When the S1 key is operated in the stopwatch mode, the mode is switched to the alarm setting mode shown in FIG. In this alarm setting mode, the alarm time can be set and canceled. Further, when the S1 key is operated in the alarm mode, the mode returns to the clock mode.

  Returning to FIG. 8, when the timing is reached when the CPU 13 is in the halt state, the timing process in step S2 is executed. In this time measuring process, the time is measured based on the clock signal output from the frequency dividing circuit 12, and the obtained date and time data is stored in the current time register 32. In the next step S3, it is determined whether or not the flag F is “1”, that is, whether or not stopwatch measurement is in progress. If the flag F = 1 and stopwatch measurement is in progress, the process proceeds to step S4 and time measurement processing is executed. In this time measurement process, the clock signal output from the frequency dividing circuit 12 is counted by a counter or the like to measure the elapsed time since the start of the stopwatch time measurement, and the measurement result is stored in the stopwatch register 35.

  When the determination in step S3 is NO, or after step S4, the process proceeds to step S5 to determine whether or not the current time matches the set alarm time. If the current time coincides with the alarm time in this determination (S5, YES), the speaker 20 is driven to report an alarm sound in the next step S6.

Next, in step S7, it is determined whether or not the register N ₀ is “1”. If the register N ₀ = 1, that is, if the mode for automatically turning on the lighting device 18 is set (S7, YES), the 3-hour timer 33 is incremented by “1” in the next step S8, In step S9, it is determined whether or not the time measured by the 3-hour timer 33 has reached 3 hours. If it is determined that 3 hours have been reached (S9, YES), the register N ₀ is set to “0” to switch to the EL auto-off mode in which the illumination device 18 is automatically turned off.

  That is, even when the mode is set to automatically turn on the lighting device 18, when 3 hours have elapsed since the mode was set, the mode is switched to the EL auto-off mode so that the lighting device 18 is automatically turned off. It has become.

  If it is determined in step S9 that 3 hours have not elapsed (S9, NO), the process proceeds to step S11 to determine whether or not the flag G is “1”. If it is determined that the flag G = 1, the lighting device 18 is turned on in the next step S12, and the 2-second timer 38 is incremented by "1" in step S13. Thereafter, in step S14, it is determined whether or not the value of the 2-second timer 38 has reached 2 seconds. If the value has reached 2 seconds, "0" is set in the flag G in step S15, and further in step S16. To clear the count and accumulation registers 36 and 37.

  That is, in the mode in which the lighting device 18 is automatically turned on, the lighting device 18 is automatically turned off when two seconds elapse after the lighting device 18 is turned on. Thereafter, in step S17, it is determined whether or not an attitude detection signal that is an output signal of the attitude detection switch 4 is detected. If an attitude detection signal is detected, the process proceeds to step S18 to execute detection processing.

  Here, the contents of the detection process of step S18 will be described with reference to the flowchart of FIG. First, in step S51 of FIG. 11, the number of times the attitude detection switch 4 is turned on is counted, and the count result is stored in the number register 36. Further, in the next step S 52, the accumulated time when the attitude detection switch 4 is turned on is counted, and the count result is stored in the accumulation register 37. Then, in step S53, it is determined whether or not the value of the number register 36 exceeds “5 times”. If the number is 5 times or less, the process proceeds to step S54 and the accumulated time of the accumulation register R37 is set to “250 ms”. Determine whether or not it has exceeded.

  If it is determined in step S53 that the posture detection switch 4 has been turned on more than five times, or if it is determined in step S54 that the total on-time of the posture detection switch 4 has exceeded 250 ms, It is determined that 1 is in a predetermined posture, for example, the user has taken a posture in which the wristwatch is tilted forward, and in step S55, the flag G is set to “1” and the lighting device 18 is turned on.

  On the other hand, when the cumulative ON time of the posture detection switch 4 is 250 ms or less, it is determined that the wristwatch 1 has not reached the predetermined posture, and the processing is ended there. As described above, the posture detection switch 4 is turned on when the number of times the posture detection switch 4 is turned on is a predetermined number of times (5 times in the embodiment) or when the cumulative on-time exceeds a predetermined time (250 ms in the embodiment). By determining that it is a thing, it is possible to accurately detect the state of a switch such as a posture detection switch having a structure in which it is difficult to stably maintain the on state or the off state.

  When the detection process in step S18 in FIG. 8 is completed as described above, the display process in step S19 is executed next. In this display process, for example, if the operation mode at that time is the stopwatch mode, the stopwatch time being measured is displayed on the liquid crystal display unit 3.

  Next, FIGS. 12 and 13 are diagrams showing output waveforms of the attitude detection switch 4. This figure shows a case where a high level signal is output when the posture detection switch 4 is in an on state, and a low level signal is output when the posture detection switch 4 is in an off state. FIG. 12 shows a signal waveform of the posture detection signal when the posture detection switch 4 is repeatedly turned on and off. When the turn-on is repeated six times or more, the user tilts his / her arm forward by the above-described processing. It judges and turns on the illuminating device 18. FIG.

  FIG. 13 shows the signal waveform of the posture detection signal when the posture detection switch 4 is turned on and off five times or less and the cumulative on time exceeds 250 ms. The cumulative on time is 250 ms. Is exceeded, it is determined that the user has tilted his arm to see the display on the liquid crystal display unit 3, and the lighting device 18 is turned on.

  Although the above embodiment has been described with respect to the case where the present invention is applied to an electronic wristwatch, it can also be applied to electronic devices other than wristwatches. Further, the posture detection switch 4 is not limited to the switch having the structure described in the embodiment, and may be a switch having another structure.

It is an external appearance front view of an embodiment of the present invention. It is a circuit block diagram of an embodiment. It is a figure which shows the structure of the register | resistor of RAM. It is a figure which shows the structure of a liquid crystal display part. It is sectional drawing of an attitude | position detection switch. It is sectional drawing of an attitude | position detection switch. It is sectional drawing when an attitude | position detection switch is an ON state. It is a flowchart which shows the whole operation | movement of an Example. It is a flowchart of a key process. It is explanatory drawing of a display state. It is a flowchart of a detection process. It is a figure which shows the detection signal of an attitude | position detection switch. It is a figure which shows the detection signal of an attitude | position detection switch.

Explanation of symbols

S1 to S5 Key 3 Liquid crystal display 4 Attitude detection switch 13 CPU
18 Lighting equipment

Claims (2)

Display means for displaying information;
Illumination means for illuminating the display means;
Posture detection means for detecting the posture of the device;
A switch for designating valid / invalid of the lighting operation of the illumination unit when a predetermined posture is detected by the posture detection unit;
Storage means for storing data indicating whether the switch is designated as valid or invalid;
An illumination drive control means for turning on the illumination means when data indicating validity is stored in the storage means when a predetermined attitude is detected by the attitude detection means;
Invalidity control means for storing data indicating invalidity in the storage means after a predetermined time after the validity is designated by the switch, and invalidating the lighting operation based on the data indicating invalidity;
An electronic device having a posture detection function. The posture detection means outputs a posture detection signal when the device assumes a predetermined posture, and the illumination drive control means calculates the cumulative number of times and the cumulative time of posture detection signals output from the posture detection means. 2. The electronic device having an attitude detection function according to claim 1, wherein when either one of the cumulative number and the cumulative time reaches a predetermined number or a predetermined time, the illumination unit is turned on.

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