CN1863349A - Cell phone with solar power supply function - Google Patents

Abstract

The invention discloses a mobile phone with a solar power supply function, which includes a solar battery and a mobile phone battery, and also includes a voltage test circuit, which is used to detect the voltage signal of the solar battery, and The voltage signal is input into the mobile phone CPU, an electronic switch, and the electronic switch is used to control the conduction between the solar cell and the mobile phone circuit and the mobile phone battery circuit, and the mobile phone CPU according to the obtained voltage The signal controls the action of the electronic switch; the voltage signal obtained by the voltage test circuit can also be used to start the voltage-illuminance conversion program through the CPU of the mobile phone, and the value of the obtained illuminance is input on the display screen of the mobile phone, and or the obtained The illuminance value is compared with the set value, and if it is not within the set value range, the mobile phone will send out an alarm signal.

Description

Cell phone with solar power

technical field

The invention relates to a mobile phone using a solar battery, in particular to a mobile phone using the solar battery to charge the battery of the mobile phone and directly supply power to the mobile phone.

Background technique

In current mobile phone products, the power supply of the mobile phone is supplied by the battery module, and the battery power can only be supplemented by the charger. If you are on a business trip and there is no AC power for a long time and you cannot use the charger, you can only hope for the power-saving mode of the mobile phone. Even so, the battery drains quickly, causing great inconvenience to people on business.

There are also solar cell phone batteries and matching portable solar cell phone chargers. But these inventions all have the same problem, that is, they cannot play their due role in the case of insufficient sunlight.

At present, China's utility model patent 00259388.2 also provides a mobile phone with solar power supply function, but it directly connects the solar battery with the battery circuit of the mobile phone. Although the structure is simple, it cannot be controlled by the mobile phone, and its performance is relatively single.

And the current mobile phone, though storing knowledge such as health care, does not have substantive health monitoring and guarantee functions.

Contents of the invention

The invention provides a mobile phone with a solar energy power supply function, which can realize charging the battery of the mobile phone and or directly supplying power to the mobile phone.

In order to solve the above technical problems, the present invention provides the following technical solutions: a mobile phone with solar power supply function, which includes a solar cell and a mobile phone battery, and it also includes a voltage test circuit, which is used to detect the the voltage signal of the solar battery, and input the voltage signal into the CPU of the mobile phone, an electronic switch, and the electronic switch is used to control the conduction between the solar battery and the mobile phone circuit and the mobile phone battery circuit, The mobile phone CPU controls the action of the electronic switch according to the obtained voltage signal.

The action of the mobile phone CPU controlling the electronic switch according to the obtained voltage signal means that the mobile phone CPU compares the voltage signal with the set voltage signal after obtaining the voltage signal from the voltage test circuit. If the above-mentioned voltage is higher than the set voltage, then the mobile phone CPU will give an open signal to the electronic switch to make it in a conducting state; The value of the obtained illuminance is input to the display screen of the mobile phone; and or the obtained illuminance value is compared with the set value, and if it is not within the range of the set value, the mobile phone sends out an alarm signal.

The electronic switch also includes a circuit for preventing the battery of the mobile phone or the external AC circuit of the mobile phone from charging the solar battery in reverse.

Compared with the prior art, the present invention has the following progress: after the combination of the voltage test circuit and the CPU of the mobile phone is used for judgment, the electronic switch controls the solar battery to directly supply power to the mobile phone or charge the mobile phone, and the electronic switch includes at least one to prevent The mobile phone battery or the external AC circuit of the mobile phone can reversely charge the solar battery, so it can not only charge the mobile phone battery or directly supply power to the mobile phone, but also effectively prevent the damage to the solar battery; in terms of cost, the price of small solar batteries is far It is lower than the mobile phone lithium battery. As a supplement to the mobile phone battery, compared with simply increasing the capacity of the mobile phone battery, it can obtain greater benefits. At the same time, solar energy, as an environmentally friendly energy source, also improves the environmental protection value of the mobile phone. Another feature of the present invention is that the voltage signal obtained by the voltage test circuit can also be used to convert the voltage and illuminance through the CPU of the mobile phone, and the obtained illuminance value is input to the display screen of the mobile phone, and the obtained illuminance value and the set If it is not within the range of the set value, the mobile phone will send out an alarm signal.

Description of drawings

Fig. 1 is a schematic diagram of the circuit of the present invention;

Fig. 2 is a structural representation of the present invention;

The control flowchart of Fig. 3 the present invention;

Fig. 4 is a diagram of an electronic switch of the present invention.

Detailed ways

As shown in Figure 1, it is a schematic circuit diagram of the present invention. The voltage test circuit 2 samples the voltage value of the solar battery 1, and then inputs it into the mobile phone CPU 5. The mobile phone CPU 5 compares the detected voltage value with the set voltage. If the former is higher than the latter, then the mobile phone CPU 5 sends signal, and electronic switch 3 is opened, and now solar battery 1 can supply power to mobile phone or also charge to mobile phone battery 4, and wherein mobile phone CPU 5 comprises mobile phone CPU and mobile phone circuit.

Since the working voltage of the mobile phone is generally 3.3-4.0V and the standby current is about 3mA, a solar cell 1 with a working voltage of 4.0V and a size of about 600mm ² can be selected. The arrangement of the solar cell 1 can be embedded in a position where the mobile phone is easy to light, such as inlaid around the external display screen of the flip phone, as shown in Figure 2, the solar cell 1 is embedded in the external display screen 7 on the front cover 6 of the flip phone around.

As shown in Figure 3, it is a schematic diagram of the control flow of the present invention. First the voltage test circuit 2 samples the voltage value of the solar cell 1, then compares the detected test voltage with the set voltage in the mobile phone CPU 5, the set voltage can be the voltage of the mobile phone battery 4, when the test voltage is high When the voltage is set, the mobile phone CPU 5 sends a signal to open the electronic switch 3. At this time, the solar battery 1 provides most of the working current to the mobile phone circuit. If the light is too strong, the open circuit voltage of the solar battery 1 is higher than that of the mobile phone battery. 4 voltage, the solar cell 1 can simultaneously flow excess current to the mobile phone battery 4 to charge it with a small current; if the test voltage is lower than the set voltage, the mobile phone CPU 5 sends a signal to close the electronic switch 3, and then At this time, the solar battery 1 no longer supplies power to the mobile phone or charges the battery 4 of the mobile phone.

The above-mentioned comparison of the open circuit voltage of the solar cell 1 with the voltage of the mobile phone battery 4 can be controlled by a circuit or a program, such as comparing the open circuit voltage of the solar cell 1 and the voltage of the mobile phone battery 4 through two diodes, or sampling the mobile phone battery 4 by the CPU. The real-time voltage is compared with the sampled voltage of the solar cell 1 to achieve.

Another major feature of the present invention is that in the case of insufficient light, the solar cell 1 is used to detect the intensity of ambient light, thereby realizing the health care function for human eyes.

The solar cell 1 is caused by different phenomena after photons collide with N-type and P-type semiconductors, resulting in a voltage difference. Therefore, there is a voltage difference across the battery in the presence of light. In the case of insufficient and unsaturated light, especially when the electronic switch 3 is turned off, the voltage and the light intensity have a certain proportional function relationship. The current light intensity can be calculated by using this proportional relationship and the above-mentioned detected test voltage.

Since it is not a professional photometric instrument, the precision of the voltage-illuminance function is low, and it can be converted by the look-up table method, as shown in Attached Table 1. The specific value can be measured by experiment. In the case of indoor weak light, the solar battery 1 can still maintain a certain voltage value, so the light metering range of the present invention is relatively wide.

Schedule 1 Open circuit voltage (V) 5.00 4.90 4.80 ... Illumination (Lux) 150000 135000 ... ...

The mobile phone CPU 5 converts according to the voltage-illuminance conversion function to obtain the value of the ambient light at that time, and then inputs the value or converts it into text on the display screen of the mobile phone, and can also compare the above value with the set illuminance value For comparison, if it is lower than the set value, the mobile phone will send out an alarm signal. The alarm signal can be sound, vibration or flash. The sound can be realized through the speaker of the mobile phone itself. The colorful lights are realized.

As shown in Figure 4, it is a kind of electronic switch among the present invention, and it is MOS switching circuit, and input terminal IN is connected solar battery 1, and output terminal OUT is connected with mobile phone circuit and mobile phone battery 4 circuits, and signal terminal S_EN is connected with mobile phone battery The CPU is connected. When the signal terminal S_EN inputs a high level, the input terminal IN and the output terminal OUT are turned on, otherwise the two are cut off. The MOS switch circuit has unidirectional conductivity, and the current can only flow from the input terminal IN to the output terminal OUT, so it can prevent the battery of the mobile phone or the external AC circuit of the mobile phone from charging the solar battery in reverse.

Claims (6)

1. mobile phone with solar power supply function, it comprises solar cell and battery of mobile phone, it is characterized in that: it also comprises

A circuit for testing voltage, described circuit for testing voltage is used to detect the voltage signal of described solar cell, and described voltage signal is input among the mobile phone CPU,

An electronic switch, described electronic switch are used to control the conducting of described solar cell and described mobile phone circuit and battery of mobile phone circuit,

Described mobile phone CPU controls the action of described electronic switch according to the described voltage signal that obtains.

2. the mobile phone with solar power supply function as claimed in claim 1 is characterized in that: described solar cell is embedded in mobile phone and is easy on the position of daylighting.

3. the mobile phone with solar power supply function as claimed in claim 1, it is characterized in that: the action that described mobile phone CPU controls described electronic switch according to the described voltage signal that obtains is meant that mobile phone CPU is behind described circuit for testing voltage acquisition voltage signal, described voltage signal and setting voltage signal are compared, if described voltage is higher than setting voltage, mobile phone CPU will make it be in conducting state to opening signal of described electronic switch so; Otherwise it is in off-state.

4. the mobile phone with solar power supply function as claimed in claim 3 is characterized in that, when described electronic switch was in off-state, this moment, mobile phone CPU carried out voltage-illuminance conversion, and the value of the illuminance that obtains is input on the mobile phone display screen.

5. as claim 3 or 4 described mobile phones with solar power supply function, it is characterized in that, when described electronic switch is in off-state, mobile phone CPU carries out voltage-illuminance conversion, and the value and the set point of the illuminance that obtains are compared, if not in range of set value, then mobile phone sends alarm signal.

6. as claim 1 or 3 described mobile phones with solar power supply function, it is characterized in that: described electronic switch comprises a circuit that prevents battery of mobile phone or outer handset alternating current circuit to the reverse charging of described solar cell.