TWI392879B - Circuit board and electronic apparatus - Google Patents

Description

Circuit board and electronic equipment Technical field

The present invention relates to a circuit substrate and an electronic device.

Background technique

Electronic equipment such as computers or mobile phones are equipped with circuit components. Further, in many electronic devices, a circuit board on which a circuit component is mounted is mounted on a printed circuit board (wiring substrate).

The circuit board may be deteriorated for some reason. Further, various reasons have been known for deteriorating the characteristics of circuit components. In addition, there is a method of dealing with the cause of the proposal (refer to, for example, Patent Document 1 to Patent Document 4).

Conventional technical literature

Patent Document 1: Japanese Patent Laid-Open Publication No. Hei 03-48999.

Patent Document 2: Japanese Patent Laid-Open Publication No. 2005-23734.

Patent Document 3: Japanese Patent Laid-Open Publication No. Hei 07-230750.

Patent Document 4: Japanese Patent Laid-Open No. Hei 10-62476.

Invention Problem to be solved by the invention

However, among the circuit components whose characteristics are deteriorated, for example, an electrolytic capacitor or a flash memory, etc., if placed for a period of six months or one year, the electrical characteristics are deteriorated. The circuit board is stored in a single unit, for example, as a spare stock. At the time, it is easy to produce a long period of storage. Further, even after the circuit board is assembled in the electronic device, the storage for the long period of time may occur. Furthermore, in view of the future trend of the technical situation or the social situation, it is expected to extend the life of the product of the circuit substrate or the electronic device.

Therefore, as the circuit components generated by long-term storage are deteriorated, the performance of the circuit board and the electronic device can be predicted to be degraded. However, although a technique for controlling the deterioration of the above-mentioned circuit components to suppress the performance degradation of the circuit board and the electronic device is expected, there has been no proposal at present.

In view of the above, an object of the present invention is to provide a circuit board and an electronic device capable of suppressing performance degradation caused by long-term storage.

A basic form of a circuit board and an electronic device that achieves the above-described object includes a wiring board and a circuit that is provided on the wiring board and operates by electric power of a first power source, and includes deterioration due to placement without power. Deteriorating parts. In the substrate form, the second power source is mounted on the wiring board, and the power supply control unit is formed on the wiring board, and the at least the deteriorated component is intermittently interrupted by the electric power of the second power source. Earth power. The substrate form of the electronic device further includes the first power source.

Effect of the invention

According to the above-described basic form of the circuit board and the electronic device described above, it is possible to suppress performance degradation caused by long-term storage.

Simple illustration

The first (A) and (B) drawings show the first embodiment.

Fig. 2 is a flow chart showing the control operation of the first embodiment.

Fig. 3 is a view showing a specific example of the energization path of the sub power source.

Fig. 4 is a flow chart showing the interrupt processing of the first embodiment.

The fifth (A) and (B) drawings show the second embodiment.

Fig. 6 is a flow chart showing the control operation of the second embodiment.

Fig. 7 is a view showing a third embodiment.

Fig. 8 is a flow chart showing the control operation of the third embodiment.

Fig. 9 is a flow chart showing the interrupt processing of the third embodiment.

The best form for implementing the invention

Specific embodiments of the circuit board and the electronic device described with respect to the basic configuration will be described below with reference to the drawings.

The above basic form is to suppress deterioration of circuit components by intermittently energizing the deteriorated parts. As a result, the circuit substrate or the electronic device can suppress the performance degradation even after long-term storage. The first application form and the second application form will be described below as a preferred application form of the above basic form. In the first application aspect, the energization control unit has a timer for measuring an elapsed time. Further, the energization control unit further includes an elapsed current supply unit that temporarily uses at least the degraded component by the electric power of the second power source when the elapsed time measured by the timer reaches a predetermined reference time power ups. Further, the energization control unit includes a reset unit that resets the timer when the degraded component is energized by the first or second power source.

According to the first application aspect, the simple energization control unit including a timer or the like can be used to periodically energize the deteriorated component.

In a second aspect of the invention, the energization control unit includes a supply confirmation unit, and the supply confirmation unit The supply confirmation unit confirms whether or not the first power source is supplied to the power supplier of the above circuit. In addition, when the supply confirmation unit has confirmed that there is no supply, the energization control unit in the second application mode is configured to temporarily energize the deteriorated component by the electric power of the second power source.

According to the second application mode, when the electric power is supplied from the first power source, the second power source is prevented from being energized, so that the power of the second power source can be maintained.

The first embodiment described below with reference to the drawings corresponds to the specific embodiment of the basic embodiment, and corresponds to the specific embodiment of the first application form and the second application form.

Fig. 1 is a view showing a first embodiment.

The electronic device 1 shown in part (A) of FIG. 1 is not particularly limited in this respect. For example, it corresponds to an information processing device represented by a personal computer or a server, and a communication base station or a communication terminal. A representative communication device, or a household electrical appliance represented by a television or a video recorder. This electronic device 1 corresponds to a specific first embodiment of the electronic device described in the basic form.

The circuit board 10 and the main power source 20 are incorporated in the electronic device 1. The main power source 20 is a constant voltage power source that applies a DC voltage to the circuit board 10 by obtaining electric power from an external AC power source (not shown). The circuit board 10 has a wiring board 17 and a circuit 13 provided on the wiring board 17. The circuit 13 includes a component group (on the substrate) 11 which does not deteriorate when the power is not supplied when the power is not supplied, and a non-energized state in which the electrical characteristics are deteriorated when the power is not supplied, such as an electrolytic capacitor or a flash memory. A group of parts (on the substrate) that will deteriorate in time. For example, when the power is not energized for a long time, the electrolytic capacitor will be responsible for the electricity. The extremely functional oxide film is broken to bring the oxide film into contact with the electrolyte. In this state, if a voltage is applied to the electrolytic capacitor, a leakage current is generated. In the parts belonging to the component group (on the substrate) 12 which are degraded when the power is not supplied, if the deterioration of the electrical characteristics is only slightly deteriorated, the characteristics can be restored by temporarily energizing. For example, the electrolytic capacitor can repair the crack by re-forming the oxide film by the leakage current generated by the energization. Among the components belonging to the component group (on the substrate) 12 which is degraded when the power is not supplied, some of the components are deteriorated when energized for a long period of time. For example, after long-term energization of an electrolytic capacitor, the properties of the electrolyte change, causing deterioration of characteristics as a capacitor. In other words, the parts belonging to the component group (on the substrate) 12 which deteriorates when the power is not supplied are deteriorated when the power is not supplied, but other deterioration occurs if the power is continuously supplied. If the parts belonging to the component group (on the substrate) 12 which are degraded when the power is not supplied are appropriately energized and not energized, the electrical characteristics can be maintained for a long period of time.

The parts belonging to the component group (on the substrate) 11 which are not deteriorated when the power is not supplied are not degraded even if the components are not energized for a long period of time. On the other hand, among the components belonging to the component group (on the substrate) 11 which are not deteriorated when the power is not supplied, some of the components are deteriorated due to long-term energization. Therefore, in order to extend the life of the circuit board 10 or the electronic device 1, it is necessary to avoid energization of the component group (on the substrate) 11 which does not deteriorate when the power is not supplied.

On the other hand, the first diagram only shows the concept that the circuit 13 includes a component group (on the substrate) 11 that does not deteriorate when the power is not supplied, and a component group (on the substrate) 12 that deteriorates when the power is not supplied. In other words, the first figure does not show the positional relationship between the component group (on the substrate) 11 which is not deteriorated when the power is not supplied, and the component group (on the substrate) 12 which deteriorates when the power is not supplied, in the circuit 13.

In addition to the circuit 13, the wiring board 17 of the circuit board 10 is provided with a sub power source 14, a control IC 15, and switches 16 and 16'. Specifically, the sub power source 14 uses a lithium battery. Further, a connector 18 for connecting the circuit board 10 and the main power source 20 is also provided on the wiring board 17.

Parts other than the circuit board 10 are also incorporated in the electronic device 1. The components other than the circuit board 10 include a component group (outside the substrate) 30 that does not deteriorate when not energized, and a component group (outside the substrate) that deteriorates when the power is not supplied when the power is not supplied. .

Here, the circuit board 10 corresponds to a specific first embodiment of the circuit board described in the basic form. Moreover, the wiring board 17 corresponds to one example of the wiring board of the above-described basic form. The main power source 20 corresponds to one of the first power sources of the above basic configuration. The circuit 13 on the circuit board 10 corresponds to an example of the circuit of the above basic form. The component belonging to the component group (on the substrate) 12 which is degraded when the circuit board 10 is not energized corresponds to one of the deteriorated components of the above-described basic form. The sub power source 14 corresponds to one of the second power sources of the above basic configuration. Further, the control IC 15 and the switches 16 and 16' constitute an example of the energization control unit of the above-described basic configuration.

The main power source 20 is connected to the circuit board 10 by a connector 18. Further, electric power is supplied to the circuit 13 on the circuit board 10 by the DC voltage through the connector 18. More specifically, power is supplied to both the component group (on the substrate) 11 that does not deteriorate when the circuit 13 is not energized, and the component group (on the substrate) 12 that deteriorates when the power is not supplied. The circuit 13 to which power has been supplied operates due to the supplied power. The operation of the circuit 13 is an information processing operation if the electronic device 1 shown in Fig. 1 is an information processing device, and is a communication device if it is a communication device. The processing action, if it is a household electrical product, is the action of the product. Further, the main power source 20 also directly supplies electric power to a component group (outside substrate) 30 that does not deteriorate when the circuit board 10 is not energized. Further, the main power source 20 also supplies electric power to the component group (outside substrate) 40 which is deteriorated when the circuit board 10 is not energized via the circuit board 10. The power supply of the main power source 20 can be turned on and off to turn off the power switch (not shown) according to the operation of the user or the opening and closing signal indication.

The sub power source 14 on the circuit board 10 supplies electric power to the control IC 15 and also deteriorates when the component group (on the substrate) 12 and the circuit board 10 which are degraded when the circuit board 10 is not energized via the switch 16 is de-energized. The component group (outside substrate) 40 supplies electric power. The parts group (on the substrate) 12 that deteriorates when not energized, and the parts that are degraded when the power is not supplied (outside the substrate) 40 are directly energized by the power of the sub power source 14. However, the first drawing merely shows the concept of supplying electric power to a component group (on the substrate) 12 which is degraded when no power is supplied, and a component group (outside substrate) 40 which is degraded when the power is not supplied. The specific supply path of the component group (on the substrate) 12 which deteriorates when the power is not supplied, and the component group (outside the substrate) 40 which deteriorates when the power is not supplied will be described later.

The switches 16, 16' use the control signals input by the control IC 15 to control the on and off. By turning on and off the switches 16 and 16' according to the control signals, it is possible to turn on and off the power of the component group (on the substrate) 12 which is degraded when the power is not supplied, and the component group (outside the substrate) 40 which is deteriorated when the power is not supplied. supply. When the switch 16, 16' is turned on, the other is turned off. Further, the switch 16' connected to the component group (on the substrate) 11 which does not deteriorate when the power is not supplied can prevent the power of the sub power source 14 from flowing to the component group (on the substrate) 11 which does not deteriorate when the power is not supplied, thereby protecting the A group of parts (on the substrate) that does not deteriorate when energized. From The control signal of the control IC 15 is output based on the control IC 15 monitoring whether or not the main power source 20 supplies power to the circuit 13 or the like.

Part (B) of Fig. 1 shows a functional block diagram of the control IC 15. The control IC 15 has a monitoring unit 51, a signal output unit 52, and a timer 53 in view of internal functions. Here, the timer 53 corresponds to an example of the timer of the first application form described above. The signal output unit 52 and the switch 16 constitute an example of the elapsed time of the first application mode. The signal output unit 52 and the monitoring unit 51 constitute an example of the reset unit of the first application form described above. Further, the monitoring unit 51 corresponds to an example of the supply confirmation unit of the second application form described above. The signal output unit 52, the timer 53, and the switch 16 constitute an example of the energization unit at the time of no power supply in the second application mode described above.

The monitoring unit 51 monitors the presence or absence of the DC voltage applied to the circuit 13 by the main power source 20, thereby confirming the presence or absence of power supply to the circuit 13 by the main power source 20. In other words, the monitoring unit 51 uses the voltage signal generated by the DC voltage of the main power source 20 as a monitoring signal for monitoring the power supply generated by the main power source 20. The monitoring result of the monitoring unit 51 is notified to the signal output unit 52. The timer 53 starts time measurement based on the instruction from the signal output unit 52. The timer 53 measures the elapsed time from the start of the complex number. Further, the timer 53 notifies the signal output unit 52 of the timing result. The signal output unit 52 outputs a control signal for turning the switches 16 and 16' on and off based on the monitoring result of the monitoring unit 51 and the timing of the timer 53. By the output of the control signal described above, the circuit board 10 energizes the component group (on the substrate) 12 which is degraded when the power is not supplied, and the component group (outside the substrate) 40 which deteriorates when the power is not supplied.

Hereinafter, the control action of the output control signal will be described with reference to a flowchart.

Fig. 2 is a flow chart showing the control operation of the first embodiment.

In the following description, the elements of Fig. 1 are not particularly limited to the drawings.

Before the start of the control operation shown in FIG. 2, preparation is made in advance (steps S101 and S102). In the preparation beforehand, the control IC 15 is set for two times by a setting means (not shown). One is a standby time T1 for energizing the component group (on the substrate) 12 which is degraded when the power is not supplied, and the component group (outside the substrate) 40 which is degraded when the power is not supplied, until the automatic start. On the other hand, the second one is a renewing time T2 required to restore the electrical characteristics of the component group (on the substrate) 12 which is degraded when the power is not supplied, and the component group (outside the substrate) 40 which is deteriorated when the power is not supplied.

After the control operation shown in FIG. 2 is started, the monitoring unit 51 monitors the presence or absence of the DC voltage of the main power source 20. When the power switch of the main power source 20 is turned off, the voltage signal (i.e., the monitor signal) generated by the DC voltage of the main power source 20 is de-asserted (step S103). The monitoring unit 51 notifies the signal output unit 52 after confirming that the monitoring signal is disabled. The signal output unit 52 that has received the notification causes the timer 53 to start time measurement as the timer A for measuring the duration of the state in which the main power source 20 is turned off (step S104). The signal output unit 52 keeps the timer 53 as the time measurement of the timer A while the measurement time of the timer A has not reached the waiting time T1 (step S105: NO) (step S106). When the measurement time of the timer A reaches the standby time T1 (step S105: YES), the signal output unit 52 outputs a control signal for turning on the switch 16 (step S107). Moreover, the signal output unit 52 stops the time measurement of the timer A and clears the measurement time of the timer A (ie, resets the timer). A). Further, the signal output unit 52 causes the timer 53 to start the time as a timer B for measuring the energization time of the component group (on the substrate) 12 which is degraded when the power is not supplied, and the component group (outside the substrate) 40 which is degraded when the power is not supplied. measuring. The component group (on the substrate) 12 which is degraded by the switch 16 when the control signal is turned on, and the component group (outside the substrate) 40 which is degraded when the power is not supplied are directly energized by the power of the sub power source 14 ( Step S108). Here, the flow chart of the second diagram will be temporarily interrupted, and a specific supply route of the component group (on the substrate) 12 which is degraded when the power is not supplied, and the component group (outside the substrate) 40 which is deteriorated when the power is not supplied will be described.

Fig. 3 shows a specific example of the energization path of the sub power source.

In the first embodiment, the current is supplied by a path corresponding to the preferred application form of the basic form.

In a preferred embodiment, the first power supply line that directs the electric power of the first power source to the first power supply line of the electric circuit and the electric power of the second electric power supply to the degraded component is provided. Further, in the application mode, the energization control unit controls the opening and closing of the second power source line. According to this application form, the degradable component can be surely energized by the second power supply line.

Figure 3 shows the path to the preferred application. The electrolytic capacitor 81 shown here is a component belonging to a component group (on the substrate) 12 which is deteriorated when the power is not supplied. The signal processing part 84 is a part belonging to a part group (on the substrate) 11 which does not deteriorate when not energized.

Power from the main power source 20 is supplied to both the electrolytic capacitor 81 and the signal processing unit 84 through the power line 80. The signal processing component 84 utilizes the power action and outputs an output signal corresponding to the input signal. Electrolytic capacitor 81 utilization This power is energized.

Further, the electric power from the sub power source 14 is also directly supplied to the electrolytic capacitor 81 by the power source line 80. The power from the sub power source 14 is turned on and off by one of the two switches 16, 16' shown in Fig. 1. The electric power from the sub power source 14 is turned on by the switch 16, and the electrolytic capacitor 81 is surely energized with the electric power. On the other hand, the other switch 16' of the two switches 16, 16' shown in Fig. 1 is also specifically shown in Fig. 3. The switch 16' is closed by a control signal when power from the secondary power source 14 is supplied to the power line, thereby preventing energization of the signal processing component 84.

Here, the power supply line 80 when the switch 16' is turned on corresponds to one of the first power supply lines of the above-described application form. Further, the power supply line 80 when the switch 16' is turned off corresponds to one of the second power supply lines of the above-described application form.

Hereinafter, returning to Fig. 2, the description of the flowchart will be continued.

In the above step S108, when the energization by the electric power of the sub power source 14 is started, the process proceeds to step S109. The signal output unit 52 causes the timer 53 to continue measuring the time as the timer B until the measurement time of the timer B has not reached the above-described refresh time T2 (step S109: No). also. The signal output unit 52 also continues to output a control signal for turning on the switch 16 (step S110). Thereby, during the renewing time T2, the component group (on the substrate) 12 which deteriorates when the power is not supplied, and the component group (outside the substrate) 40 which deteriorates when the power is not supplied are maintained, and the characteristics of the respective components are restored. Next, the signal output unit 52 outputs a control signal for turning off the switch 16 after the measurement time of the timer B reaches the renewing time T2 (step S109: Yes) (step S111). Moreover, the signal output unit 52 stops the measurement time of the timer B and clears the measurement time of the timer B (ie, resets the timing). B). Further, the signal output unit 52 causes the timer 53 to start measuring time as the timer A. Next, returning to the above step S105, the operation after step S105 is repeated.

According to the operation shown in the flowchart of Fig. 2 described above, the circuit board 10 periodically and autonomously repeats the energization of the deteriorated component group. This regular energization maintains the electrical characteristics of the components belonging to the deteriorated component group. Therefore, the electronic device 1 can maintain the performance as the circuit board 10 or the electronic device 1 even when it is not used for a long period of time. In addition, this periodic and autonomous energization can be performed when the electronic circuit 1 is not mounted in the circuit board 10 as a spare stock or the like, and can be stored in a single unit. Therefore, even when the circuit board 10 is separately stored, the performance of the circuit board 10 can be maintained for a long period of time.

In the first embodiment, the interrupt operation described below is periodically executed while the control operation shown in Fig. 2 is being executed.

Fig. 4 is a flow chart showing the interrupt processing of the first embodiment.

The interrupt processing shown in Fig. 4 is a process that is periodically executed during the control operation shown in Fig. 2. After the interrupt processing is started, the monitoring unit 51 confirms whether or not the DC voltage of the main power source 20 is present (step S202). When the voltage signal (ie, the monitor signal) generated by the DC voltage of the main power source 20 is disabled, the interrupt processing is terminated. After the end, the control action shown in Figure 2 will start again at the interruption.

While the control operation shown in Fig. 2 is being executed, when the power switch of the main power source 20 is turned on, the monitor signal is asserted (step S201). After the interruption processing shown in FIG. 4 is started, the monitoring unit 51 confirms the enabled state of the monitoring signal (step S202: Yes). Then, the control IC 15 interrupts the second The control action shown in the figure (step S203). More specifically, the signal output unit 52 outputs a control signal for turning off the switch 16. Thereafter, the signal output unit 52 stops the time measurement of the timer A and the timer B in step S204, and clears the measurement times of the timer A and the timer B together (ie, resets the timer A and the timer B). . Next, the control IC 15 returns to the beginning of the control operation shown in FIG.

The interrupt processing shown in FIG. 4 has a component group (on the substrate) 12 that degrades when the main power source 20 is turned on, and a component group (outside the substrate) that deteriorates when the power source 14 is not energized. The effect of power-off. As a result, unnecessary waste of the power of the sub power source 14 can be avoided, so that the power of the sub power source 14 can be increased by the amount of power to be avoided.

The above description of the first embodiment will be completed, and the second embodiment will be described next. The second embodiment also corresponds to a specific form of the above basic form. Further, the second embodiment corresponds to the specific embodiment of the first application mode, but does not correspond to the specific embodiment of the second application mode.

Fig. 5 shows a second embodiment.

The electronic device 2 shown in Fig. 5 corresponds to a specific second embodiment of the electronic device described in the basic form. The electronic device 2 of the second embodiment is the same as the electronic device 1 of the first embodiment except that it has a circuit board 60 different from that of the first embodiment. Moreover, the circuit board 60 shown in FIG. 5 corresponds to a specific second embodiment of the circuit board described in the basic form. The circuit board 60 of the second embodiment is the same as the circuit board of the first embodiment except that it has a control IC 61 different from that of the first embodiment.

Hereinafter, the second embodiment will be described with a focus on differences from the first embodiment. form.

The control IC 61 included in the circuit board 60 shown in part (A) of Fig. 5 operates by electric power from the sub power source 14 to output a control signal. The control signal is input to the switches 16, 16'. In other words, the object controlled by the control signal is the same as the object of control in the first embodiment. However, the control IC 61 does not perform DC voltage monitoring of the main power source 20. Therefore, the timing at which the control signal is output from the control IC 61 is slightly different from the output time point in the first embodiment.

Part (B) of Fig. 5 shows a functional block diagram of the control IC 61. As shown in the functional block diagram, the control IC 61 has a timer 53 and a signal output portion 62 as internal functions. However, the control IC 61 does not have the monitoring unit of the first embodiment. In the second embodiment shown in FIG. 5, the control IC 61 periodically performs energization of the component group (on the substrate) 12 which is degraded when the sub power source 14 is not energized.

Here, the timer 53 corresponds to a timer example of the first application form described above. The signal output unit 62 and the switches 16 and 16' constitute an example of the energization unit at the time of the above-described first application mode. The signal output unit 62 corresponds to an example of a reset unit of the first application form described above.

Fig. 6 is a flow chart showing the control operation of the second embodiment.

The flowchart shown in Fig. 6 is the same as the flowchart shown in Fig. 2 except that step S103 is missing.

When the sub power source 14 (lithium battery) shown in Fig. 5 is placed in the circuit board 60, and the control IC 61 is supplied with electric power, the control operation of the flowchart shown in Fig. 6 is started. Further, in the second embodiment, the interrupt processing for interrupting the control operation of Fig. 6 is not performed. Therefore, in the second embodiment, whether or not it comes from the main The power supply of the power source 20 can be performed on the component group (on the substrate) 12 which is degraded when the power is not supplied, as long as the power of the sub power source 14 continues.

In the second embodiment described above, the circuit board 60 also periodically and autonomously re-energizes the deteriorated component group. Therefore, even when the electronic device 1 is not used for a long period of time, or when the circuit board 10 is stored for a long period of time, the performance as the circuit board 10 or the electronic device 1 can be maintained.

Next, a third embodiment will be described. This third embodiment corresponds to a specific embodiment of the above basic form. Further, the third embodiment corresponds to a specific embodiment of the first application form and the second application form. Furthermore, the third embodiment also corresponds to a specific embodiment of the third application mode.

In a third aspect of the invention, the second power source is a common power source having the first power source. Further, the third application mode has a power supply line for guiding the electric power of the common power supply to the electric circuit, and a switch for turning on and off the power supply line in accordance with an instruction from the outside of the wiring board.

The third application form is a type of electric power that can supply a circuit for operating a circuit on a circuit board on a circuit board. According to the third aspect of the invention, the self-supply electric power on the circuit board can be utilized as the first power source and the second power source, thereby suppressing deterioration of performance of the circuit board for a long period of time.

Fig. 7 shows a third embodiment.

The circuit board 70 shown in FIG. 7 can function as an electronic device by the circuit board 70 alone. This circuit board 70 corresponds to a specific third embodiment of the circuit board described in the basic form, and corresponds to the basic A specific third embodiment of the electronic device in the form.

In the components of the circuit board 70, the same components as those of the circuit board 10 shown in Fig. 1 are denoted by the same reference numerals and will not be described.

The power source 14 of the circuit board 70 is identical to the sub power source 14 shown in Fig. 1 and is a lithium battery. However, in the third embodiment, it is simply referred to as a "battery".

The circuit board 70 has a power supply line 71 for guiding the power of the power source 14 to the circuit 13. Further, the circuit board 70 also has a switch 72 for turning the power source line 71 on and off in accordance with an instruction from the outside of the circuit board 70. Here, the specific content of the "instruction" is not particularly limited, and may be, for example, a control signal for inputting the on/off state of the control power switch 72, or a manual operation by the user.

The circuit board 70 of the third embodiment is substantially the same as the circuit board 10 of the first embodiment except that the power source 14 is responsible for both the main power source 20 and the sub power source 14 of the first embodiment. Therefore, the control operation or the interrupt processing performed by the control IC 15 of the third embodiment will be described as follows, and is substantially the same as the control operation of the first embodiment.

Fig. 8 is a flow chart showing the control operation of the third embodiment.

In the flowchart shown in Fig. 8, after the power switch 72 turns off the voltage applied to the circuit 13 via the power source line 71 from the unique power source 14 shown in Fig. 7, the monitor signal is disabled (step S103'). Further, in step S107, when the switch 16 is turned on, the power of the only power source 14 shown in Fig. 7 is used to energize the component group (on the substrate) 12 which is degraded when the power is not supplied (step S108'). Except for these two steps S103', S108', the other steps are the same as those shown in Fig. 2. with. Further, as a whole of the control operation, the control operation shown in the flowchart of Fig. 8 is essentially the same as the control operation shown in the flowchart of Fig. 2.

Fig. 9 is a flow chart showing the interrupt processing of the third embodiment.

In the flowchart shown in Fig. 9, after the power switch 72 shown in Fig. 7 is turned on, the monitor signal is enabled (step S201'). Except for this one step S201', the other steps are the same as those shown in Fig. 4. Further, as for the interrupt processing as a whole, the interrupt processing shown in the flowchart of Fig. 9 is essentially the same as the interrupt processing shown in the flowchart of Fig. 4.

In the circuit board 70 of the third embodiment, by performing the above-described control operation or interrupt processing, the performance of the circuit board 70 can be maintained for a long period of time while saving power supplied from the circuit board 70.

1,2‧‧‧Electronic machines

10,60‧‧‧ circuit substrate

11‧‧‧Parts that are not degraded when energized (on the substrate)

12‧‧‧Parts that are degraded when not energized (on the substrate)

13‧‧‧ Circuitry

14‧‧‧Sub power supply

15‧‧‧Control IC

16,16’‧‧ switch

17‧‧‧Wiring substrate

18‧‧‧Connector

20‧‧‧Main power supply

30‧‧‧Parts group (outside the substrate) that does not deteriorate when not energized

40‧‧‧Parts group that is degraded when not energized (outside the substrate)

51‧‧‧Monitoring Department

52‧‧‧Signal Output

53‧‧‧Timer

60‧‧‧ circuit board

61‧‧‧Control IC

62‧‧‧Signal Output

70‧‧‧ circuit board

71‧‧‧Power cord

72‧‧‧ switch

80‧‧‧Power cord

81‧‧‧ electrolytic capacitor

84‧‧‧Signal processing parts

The first (A) and (B) drawings show the first embodiment.

Fig. 2 is a flow chart showing the control operation of the first embodiment.

Fig. 3 is a view showing a specific example of the energization path of the sub power source.

Fig. 4 is a flow chart showing the interrupt processing of the first embodiment.

The fifth (A) and (B) drawings show the second embodiment.

Fig. 6 is a flow chart showing the control operation of the second embodiment.

Fig. 7 is a view showing a third embodiment.

Fig. 8 is a flow chart showing the control operation of the third embodiment.

Fig. 9 is a flow chart showing the interrupt processing of the third embodiment.

1‧‧‧Electronic machines

10‧‧‧ circuit board

11‧‧‧Parts that are not degraded when energized (on the substrate)

12‧‧‧Parts that are degraded when not energized (on the substrate)

13‧‧‧ Circuitry

14‧‧‧Sub power supply

15‧‧‧Control IC

16,16’‧‧ switch

17‧‧‧Wiring substrate

18‧‧‧Connector

20‧‧‧Main power supply

30‧‧‧Parts that do not deteriorate when not energized (outside the substrate)

40‧‧‧Parts that are degraded when not energized (outside the substrate)

51‧‧‧Monitoring Department

52‧‧‧Signal Output

53‧‧‧Timer

Claims (11)

A circuit board comprising: a wiring board; the circuit is provided on the wiring board and operated by electric power of a first power source, and includes a component that is deteriorated by being placed without power; The power source is mounted on the wiring board, and the power supply control unit is configured on the wiring board, and at least the components are intermittently energized by the electric power of the second power source. The circuit board according to claim 1, wherein the energization control unit includes a timer that measures an elapsed time, and an elapsed time elapsed unit that uses the elapsed time measured by the timer to reach a predetermined reference time. The electric power of the second power source temporarily energizes at least the components; and the reset unit resets the timer when the components (using the first or second power source) are energized. The circuit board according to the first aspect of the invention, wherein the power supply control unit includes: a supply confirmation unit that confirms presence or absence of a first power source to the power supplier of the circuit; and a power supply unit that has no power supply, wherein the supply confirmation unit has When it is confirmed that there is no supply, at least the above-mentioned components are temporarily energized by the electric power of the second power source. The circuit board of claim 1, wherein the second power source is And a common power source of the first power source, wherein the circuit board includes: a power line that directs power of the common power source to the circuit; and a switch that turns on and off the power line according to an instruction from the wiring board . The circuit board of claim 1, comprising: a first power supply line that directs power of the first power source to the circuit; and a second power supply line that directs power of the second power source to the part Further, the energization control unit controls the opening and closing of the second power source line. An electronic device comprising: a first power source that can be turned on and off; a wiring board; and a circuit that is connected to the wiring board and operated by electric power of a first power source, and includes an electric power supply The second power source is mounted on the wiring board, and the power supply control unit is configured on the wiring board, and at least the components are intermittently energized by the electric power of the second power source. By. The electronic device according to claim 6, wherein the energization control unit includes a timer that measures an elapsed time, and an elapsed time energization unit that uses the elapsed time measured by the timer to reach a predetermined reference time. The electric power of the second power source is used to temporarily energize at least the components; and The reset unit resets the timer when the component (using the first or second power source) is energized. The electronic device according to claim 6, wherein the power supply control unit includes: a supply confirmation unit that confirms presence or absence of a first power source to the power supplier of the circuit; and a power supply unit that has no power supply, wherein the supply confirmation unit has When it is confirmed that there is no supply, at least the above-mentioned components are temporarily energized by the electric power of the second power source. The electronic device of claim 6, wherein the second power source is a common power source of the first power source, and includes a power line that directs power of the common power source to the circuit; and the switch is based on An indication from outside the aforementioned wiring substrate is turned on to turn off the aforementioned power supply line. An electronic device according to claim 6 is characterized in that: the first power supply line directs power of the first power source to the circuit; and the second power supply line directs power of the second power source to the part Further, the energization control unit controls the opening and closing of the second power source line. An electronic device according to claim 6 which has an external component of the substrate, the external component of the substrate being disposed outside the wiring substrate, and an external component of the substrate which is deteriorated when placed without power, and can be utilized with the aforementioned component before The electric power of the second power source is energized, and the electric power of the second power source is used to supply electricity.