JPH0432632Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Technical Field of the Invention] This invention relates to a small electronic device with a light sensor.

[Background of the idea]

In recent years, electronic wristwatches have become more multi-functional, and in addition to their original timekeeping function, they also have a so-called data bank function that stores arbitrary data such as a telephone number in advance and reads and displays it at will, or a function that can monitor the outside temperature. Some devices are known that have a temperature sensor function that detects and displays the temperature.

Incidentally, in recent years, there has been a trend of incorporating outdoor sports into people's lifestyles for the purpose of health management, etc., but the negative effects of sunburn on the skin on beauty and health are becoming a problem. Therefore, as described in Japanese Utility Model Application Publication No. 55-60593, for example, a wristwatch is equipped with an element that detects ultraviolet rays, and the intensity of ultraviolet rays at that time is measured and displayed, or the cumulative amount of ultraviolet rays is measured. It is considered to be displayed. However, when measuring and displaying the cumulative amount of ultraviolet rays, the above measurement is usually used only during the day, and measurement must be continued even when it is no longer necessary to use it in the evening or night. is of no use at all, and results in nothing but wasteful power consumption. Furthermore, the above cumulative amount usually tells you at the end of the day how much UV rays you received that day, but if the measurement operation continues from the previous day, it will be the cumulative amount from the previous day, and the cumulative amount for that day will not be calculated. There was a problem that it was impossible to know the amount.

[Purpose of the invention] This invention was made in order to solve the above-mentioned problems, and its purpose is to eliminate unnecessary power consumption and to reliably display the cumulative amount of ultraviolet rays received on that day. The purpose of the present invention is to provide a compact device with a light sensor that can perform the following tasks.

[Main points of the invention] In order to achieve the above-mentioned purpose, this invention
The amount of ultraviolet rays detected by the optical sensor is accumulated and the time is measured.
The gist is that the cumulative operation is stopped when a predetermined time, such as half a day, has elapsed.

[Configuration of Example]

This invention will be specifically explained below based on an embodiment shown in FIGS. 1 to 4. FIG. 2 is an external plan view of an electronic wristwatch with a light sensor to which this invention is applied. This wristwatch is an electronic timepiece that displays time data digitally, and an optical sensor 2 is disposed above the display section 1. Display section 1
is composed of, for example, a liquid crystal display element with a segment electrode structure, and the lower side displays day of the week, month, date data (MON, December 26th), and time data of hours, minutes, and seconds (MON, December 26th). A clock display section 1A for displaying the time (10:00:35) is provided, and light amount display sections 1B and 1C are provided above it. In this case, the light amount display section 1B displays the cumulative amount of ultraviolet light detected by the optical sensor 2, and the light amount display section 1C displays the preset amount of ultraviolet light. On the other hand, the optical sensor 2 detects the amount of ultraviolet rays when sunlight is irradiated through an ultraviolet filter which will be described later. In addition, various push button switches S ₁ to _{S 4} are arranged on both sides of the watch case.

FIG. 3 shows a sectional view taken along the line in FIG. 2, and protective glasses 4 and 5 are provided on the upper surface of the watch case 3 at locations corresponding to the display section 1 and the optical sensor 2, respectively. The display unit 1 disposed below the protective glass 4 is electrically connected to a circuit board 7 via an interconnector 6, and an optical sensor is connected to the bottom surface of the protective glass 5 via an ultraviolet filter 8. 2 is formed, and this optical sensor 2 is electrically connected to a circuit board 7 via an interconnector 9. Further, a piezoelectric element 11 constituting a piezoelectric buzzer is attached to the inner surface of the back cover 10, and this piezoelectric buzzer uses the back cover 10 as a diaphragm. Note that a power battery 12 is housed between the circuit board 7 and the back cover 10.

Next, the circuit configuration of this electronic timepiece will be explained with reference to FIG. The reference clock signal outputted from the crystal oscillator 21 is sent to a frequency divider circuit 22 where it is frequency-divided into a time clock signal of a predetermined frequency, and then counted by a timer 23. The clock unit 23 counts time, date data, etc. This clock data is converted into a display signal by the display drive circuit 24 and then sent to the display unit 1. The frequency dividing circuit 22 also outputs a signal of a predetermined frequency to connect the optical sensor 2 and the A/D.
The signal is given to the (analog/digital) converter 25 as an operation command signal. The optical sensor 2 operates at regular intervals based on the output from the frequency dividing circuit 22 and provides the output to the A/D converter 25, and the A/D converter 25 digitally converts the output of the optical sensor 2. Then, the digital amount of light received thus obtained is given to the control section 26 and the integration circuit 27.

The control section 26 controls various operations, and receives a signal of a predetermined frequency from the frequency dividing circuit 22, and also receives operation signals from the push button switches _S1 to _S4 . Thus, the control section 23 outputs a correction signal to the timekeeping section 23 in response to the switch operation, and corrects the contents of the timekeeping section 23. That is,
Operate switch S ₁ to set the correction mode, operate switch S ₂ in this correction mode to select the digit to be corrected, and then switch the contents of the selected digit.
The contents of the timer section 23 are corrected by advancing it by operating _S3 . Furthermore, when the preset mode is set by operating the switch _S1 , the control unit 26 sends the mode input according to the operation of the switches _S2 and _S3 to the setting unit 28, and sets desired data to the setting unit. It is designed to be preset to 28. Furthermore, in the preset mode, the control section 26 outputs a period selection signal a for selecting one of a plurality of periods, such as one day, half a day, and one hour, depending on the number of times the switch _S4 is operated. It is given to the integration circuit 27. This integration circuit 27 has one input from the control section 26.
In a state where the divided period signal b is input and the light amount detection mode is set by operating the switch S ₁ , the control unit 2 is activated by operating the switch S ₄ .
A function stop signal c output from 6 is input. Therefore, the integrating circuit 27 accumulates the amount of light received by the optical sensor 2 output from the A/D converter 25 during the period specified by the period selection signal a, and the cumulative value is sent to the coincidence detector 29. Sent. The coincidence detection section 29 detects the coincidence between the data from the setting section 28 and the data from the integration circuit 27. Upon detecting this coincidence, it outputs a buzzer drive signal and gives it to the piezoelectric buzzer 31 via the OR gate 30. , outputs a blinking signal and supplies it to the display drive circuit 24. The output data of the integration circuit 27 and the setting section 28 is sent to the display drive circuit 24 via the OR gate 32.
and displayed on the corresponding light amount display sections 1B and 1C. In this case, when the display drive circuit 24 receives a blinking signal from the coincidence detection section 29, it blinks the contents of the light amount display section 1B that displays the output data of the integrating circuit 27. The integration circuit 27 outputs a buzzer drive signal and applies it to the piezoelectric buzzer 31 via an OR gate 30.

Next, the integration circuit 27 will be explained in detail with reference to FIG. The period selection signal a is given to the counter 27-1. This counter 27-1 counts the signal b with a period of one minute, and if the period specified according to the period selection signal a, for example, one day, half a day, or one hour, the counter 27-1 counts the signal b in 1440 digits corresponding to the period specified according to the period selection signal a. , functions as a 720-decimal, hexadecimal-decimal counter. And counter 27-
The carry signal from 1 is sent out as a buzzer drive signal. Further, the signal b having a period of one minute is given to the addition circuit 27-2 and the storage circuit 27-3 as operation command signals, respectively. The addition circuit 27-2 is
When the data is input from the A/D converter 25 via the AND gate 27-4, the data is added to the data from the memory circuit 27-3, and the resulting data is sent to the memory circuit 2.
7-3 is performed in accordance with signal b. Furthermore, the contents of the memory circuit 27-3 are as follows:
The signal is sent to the coincidence detection section 29 and the display drive circuit 24. Further, the stop signal c is applied to the T input terminal of trigger flip-flop (T-FF) 27-5 to invert its output state. This T-
The Q output of the FF 27-5 is given to the counter 27-1, which stops the counting operation of the counter 27-1, and is also input to the OR gate 27-6. The carry signal of the counter 27-1 is also input to the other input terminal of the OR gate 27-6, and the output of the OR gate 27-6 is gate-controlled to the AND gate 27-4 via an inverter 27-7. given as a signal.

[Operation of the embodiment]

The operation of this optical sensor-equipped electronic wristwatch will now be explained based on an example of its use for managing the degree of sunburn on the skin caused by sunlight. First, before starting outdoor sports, etc., operate switch _S1 to set the preset mode. In this preset mode, a limit value of the amount of ultraviolet rays is preset in the setting section 28 so that exposure to ultraviolet rays for a predetermined period will not cause any problems in terms of beauty or health. In this case, the digit in the setting section 28 is selected by operating the switch _S2 , and the content of the selected digit is then incremented by operating the switch _S3 . Note that the contents of the setting section 28 are sent to the display drive circuit 24, and the contents of the setting section 28 are sent to the display drive circuit 24,
Since the settings are displayed digitally, you can perform setting operations while visually reading the displayed contents. In addition, the scheduled period of exposure to ultraviolet rays is selected in advance. In this case, when switch _S4 is operated in the preset mode, a period selection signal a corresponding to the number of operations is given to the counter 27-1 of the integrating circuit 27, so that the counter 27-1 selects a period corresponding to the selected period. It will function as a step count counter.

When the switch S ₁ is operated to cancel the preset mode and set the light amount detection mode, the control section 26 outputs a signal b with a period of one minute and is applied to the integration circuit 27. As a result, the adder circuit 27-2 and the memory circuit 27-3 operate, and the adder circuit 27-2 adds the data from the A/D converter 25 and the data from the memory circuit 27-3, and the result is Transfer the data to the storage circuit 27-3. Therefore, the cumulative value of the amount of ultraviolet rays detected by the optical sensor 2 is stored in the memory circuit 27-3.
The contents of this memory circuit 27-3 are stored in the display drive circuit 2
4 and digitally displayed on the light amount display section 1B. Therefore, from this display content, it is possible to know how much ultraviolet rays the user has been exposed to since starting outdoor sports or the like. At the same time,
The contents of the storage circuit 27-3 are sent to the coincidence detection section 24 and compared with the contents of the setting section 28. Here, when the coincidence detection section 24 detects coincidence between both data, it outputs a buzzer drive signal and a blinking signal. Therefore, an alarm sound is generated and the contents of the light quantity display section 1B are displayed blinking. This allows the user to know that they have been exposed to ultraviolet radiation up to that limit before the preselected period of time has elapsed. When the preselected period elapses and a carry signal is output from the counter 27-1, a buzzer drive signal is output, an alarm sound is generated, and the carry signal from the counter 27-1 is output to the inverter 27. -7 to the AND gate 27-4, and the AND gate 27
-4 is closed, the output of the A/D converter 25 is not supplied to the adding circuit 27-2, and therefore the operation of accumulating the amount of ultraviolet rays is stopped thereafter. If the switch _S4 is operated before the period has elapsed, the control section 26 outputs a function stop signal c, which resets the TFF 27-5 of the integration circuit 27. As a result, the counting operation of the counter 27-1 is stopped, and as in the case described above, the AND gate 27-4 is closed and the cumulative operation of ultraviolet rays is stopped.

Note that this invention is not limited to the above embodiments,
Various modifications can be made without departing from this invention. For example, as shown in FIG. 5, the total value of the detected amount of ultraviolet rays may be displayed as a ratio to a preset amount of ultraviolet rays. Further, in the above embodiment, the application example is the management of sunburn on the skin by ultraviolet rays, but the application mode is not limited to this and may be used in any manner.

[Effect of idea]

As explained in detail above, this invention not only accumulates the amount of ultraviolet rays detected by the optical sensor, but also stops this cumulative operation using a switch.
Since it can be automatically stopped after a predetermined time, such as one day or half a day, there is no unnecessary power consumption, and there is no possibility that the cumulative amount from the previous day will be mistaken as the cumulative amount of ultraviolet rays for the current day. . Therefore,
By managing the degree of sunburn on the skin using the small electronic device with a light sensor according to the present invention, excessive sunburn can be prevented, which is beneficial for beauty and health.

[Brief explanation of drawings]

Figures 1 to 4 show an embodiment of this invention. Figure 1 is a circuit configuration diagram of an electronic wristwatch with a light sensor to which this invention is applied, Figure 2 is a plan view of its external appearance, and Figure 3 is a diagram of its external appearance. FIG. 2 is a sectional view taken along the line B, FIG. 4 is a specific circuit configuration diagram of the integration circuit shown in FIG. 1, and FIG. 5 is a diagram showing a modification of the display state. DESCRIPTION OF SYMBOLS 1... Display part, 2... Light sensor, 8... Ultraviolet filter, 26... Control part, 27... Integration circuit, 28... Setting part.

Claims (1)

[Scope of utility model registration request] an optical sensor for detecting ultraviolet rays, a totalizing means for accumulating the amount of ultraviolet rays detected by the optical sensor at fixed time intervals, a start switch means for causing the accumulating means to start accumulating at fixed time intervals, and a stop switch means for stopping the accumulation of time intervals; a display means for displaying the amount of ultraviolet rays accumulated by the accumulation means; and a display means for measuring the time from the start of the accumulation by the start switch means, and a stop switch means for measuring the time since the start of the accumulation by the start switch means. A small electronic device with an optical sensor, comprising timer means for stopping the accumulation by the accumulation means when half a day or one day has passed without any activity being done.