Mother board

A mother board including a controller, a rapid charging initiation unit, a connection port, and a switching unit is provided. The rapid charging initiation unit provides a first voltage ranging from 3.2 V to 11 V and a second voltage ranging from 2.7 V to 0.6 V. A voltage difference between the first voltage and the second voltage ranges from 0.5 V to 0.8 V. The connection port is coupled to a smartphone. The switching unit is coupled to the controller, the rapid charging initiation unit, and the connection port for determining whether the connection port is coupled to the controller or the rapid charging initiation unit according to a switching signal. When the connection port is coupled to the rapid charging initiation unit, the first voltage and the second voltage are sent to the smartphone through the connection port for activating the rapid charging function of the smartphone.

BACKGROUND OF THE INVENTION

1. Field of the Invention

The invention is related to a mother board and particularly to a mother board capable of activating a rapid charging function of a smartphone.

2. Description of Related Art

Cellular phones have replaced traditional landline phones and become the most convenient communication channel with their increasing popularization. Nevertheless, cellular phones carrying basic functions such as making phone calls, browsing internet, and playing multimedia files can no longer satisfy various demands of consumers. To meet consumers' demands, manufacturers of cellular phones work on developing smartphones with more functions and better expandability for increasing their market share.

Since smartphones have functions similar to those of personal computers (PCs), smartphones and PCs can transmit data to each other by connecting smartphones to connection ports of PCs through connection lines. Here, connection ports are, for example, universal serial bus (USB) connection ports. When data is transmitted between smartphones and PCs, batteries of smartphones can also be charged by receiving power from PCs through connection ports. Charging smartphones through PCs has become more common due to the popularization of PCs. The manner of rapid charging smartphones through PCs is thus important.

SUMMARY OF THE INVENTION

The invention is directed to a mother board capable of activating a rapid charging function of a smartphone.

The invention is directed to a mother board including a controller, a rapid charging initiation unit, a connection port, and a switching unit. The controller is configured to output or receive a data signal. The rapid charging initiation unit provides a first voltage and a second voltage. The first voltage ranges from 3.2 V to 1.1 V, the second voltage ranges from 2.7 V to 0.6 V, and a voltage difference between the first voltage and the second voltage ranges from 0.5 V to 0.8 V. The connection port is coupled to the smartphone. The switching unit is coupled to the controller, the rapid charging initiation unit, and the connection port so as to determine whether the connection port is coupled to the controller or the rapid charging initiation unit according to a switching signal. When the connection port is coupled to the rapid charging initiation unit, the first voltage and the second voltage are sent to the smartphone through the connection port for activating the rapid charging function of the smartphone.

In an embodiment of the invention, the rapid charging initiation unit includes a first resistor, a second resistor, a third resistor, and a fourth resistor. The first resistor has a first terminal coupled to a system voltage and a second terminal outputting the first voltage. The second resistor has a first terminal coupled to the second terminal of the first resistor and a second terminal coupled to a ground voltage. The third resistor has a first terminal coupled to the system voltage and a second terminal outputting the second voltage. The fourth resistor has a first terminal coupled to the second terminal of the third resistor and a second terminal coupled to the ground voltage.

In an embodiment of the invention, the transmittance of the switching signal is determined by the setting of a basic input-output system (BIOS).

In an embodiment of the invention, the connection port is a universal serial bus (USB) connection port and the controller is a USB controller.

In an embodiment of the invention, the first voltage and the second voltage are sent to the smartphone via a first data pin and a second data pin of the connection port respectively.

In an embodiment of the invention, the switching unit pre-couples the controller to the connection port.

In an embodiment of the invention, the smartphone is an iPhone.

In light of the foregoing, the switching unit in the mother board of the invention couples the connection port to the controller or the rapid charging initiation unit according to the switching signal. When the connection port is coupled to the rapid charging initiation unit, the first voltage and the second voltage of the rapid charging initiation unit are sent to the smartphone for activating the rapid charging function of the smartphone, so as to increase the charging speed of the smartphone.

DESCRIPTION OF THE EMBODIMENTS

FIG. 1is a block diagram depicting a system of a mother board coupled to a smartphone according to an embodiment of the invention. Referring toFIG. 1, in the present embodiment, a mother board100includes a data processing circuit110, a controller120, a rapid charging initiation unit130, a switching unit140, a basic input-output system (BIOS)150, and a connection port CP. The data processing circuit110is configured to process data transmitted from the controller120or transmit data to the controller120. Here, the data processing circuit110is disposed with devices required for data processing, such that the data processing circuit110has data processing ability. The devices included in the data processing circuit110are known to persons skilled in the art, and thus not repeated hereinafter.

After receiving data transmitted from the data processing circuit110, the controller120outputs a data signal SD, where the data signal SD is a differential signal. On the contrary, after receiving the data signal SD, the controller120outputs data to the data processing circuit110. The rapid charging initiation unit130is configured to provide a first voltage V1and a second voltage V2. The first voltage V1ranges from 3.2 V to 1.1 V, the second voltage V2ranges from 2.7 V to 0.6 V, and a voltage difference between the first voltage V1and the second voltage V2ranges from 0.5 V to 0.8 V. In addition, the first voltage V1and the second voltage V2are configured to active the rapid charging function of a smartphone20. Herein, the smartphone20is an iPhone, for instance. The connection port CP is coupled to the smartphone20.

The switching unit140is coupled to the controller120, the rapid charging initiation unit130, and the connection port CP. The switching unit140determines whether the connection port CP is coupled to the controller120or the rapid charging initiation unit130according to a switching signal SS. Moreover, the switching unit140pre-couples the controller120to the connection port CP. The switching signal SS in the present embodiment is transmitted from the BIOS, where the switching signal SS is determined by the setting stored in the BIOS. However, in other embodiments, the switching signal SS can be transmitted from a control circuit or a switch, where the switching signal SS is determined by the setting of the control circuit or the switch. When the connection port CP is a universal serial bus (USB) connection port, then the controller120is correspondingly a USB controller.

When the connection port CP is coupled to the rapid charging initiation unit130, the first voltage V1and the second voltage V2are sent to the smartphone20through the connection port CP for activating the rapid charging function of the smartphone20. In details, the first voltage V1of the rapid charging initiation unit130is transmitted to a first data pin DP1of the connection port CP through the switching unit140, so that the first voltage V1is transmitted to the smartphone20via the first data pin DP1. Further, the second voltage V2of the rapid charging initiation unit130is transmitted to a second data pin DP2of the connection port CP through the switching unit140, so that the second voltage V2is transmitted to the smartphone20via the second data pin DP2. The first data pin DP1is a positive data (D+) pin of the USB connection port and the second data pin DP2is a negative data (D−) pin of the USB connection port.

When the connection port CP is coupled to the controller120, the controller120outputs the data signal SD to the smartphone20through the connection port CP or receives the data signal SD transmitted from the smartphone20. Specifically, the data signal SD of the controller120is transmitted to the smartphone20via the first data pin DP1and the second data pin DP2. The data signal SD of the smartphone20is transmitted to the controller120via the first data pin DP1and the second data pin DP2.

Accordingly, when the smartphone20is coupled to the connection port CP, the switching unit140determines whether the connection port CP is coupled to the controller120or the rapid charging initiation unit130according to the switching signal SS. When the connection port CP is coupled to the controller120, data is transmitted between the smartphone20and the data processing circuit110. Moreover, the smartphone20can receive power from the mother board100to undergo regular charging of cellular phone battery. When the connection port CP is coupled to the rapid charging initiation unit130, the smartphone20receives the first voltage V1and the second voltage V2of the rapid charging initiation unit130to active the rapid charging function. As a result, the smartphone20then receives power from the mother board100to undergo rapid charging of the cellular phone battery.

FIG. 2is a circuit diagram of a rapid charging initiation unit illustrated inFIG. 1. Referring toFIG. 2, in the present embodiment, the rapid charging initiation unit130includes a first resistor R1, a second resistor R2, a third resistor R3, and a fourth resistor R4. The first resistor R1has a first terminal coupled to a system voltage Vcc and a second terminal outputting the first voltage V1. The second resistor R2has a first terminal coupled to the second terminal of the first resistor R1and a second terminal coupled to a ground voltage. The third resistor R3has a first terminal coupled to the system voltage Vcc and a second terminal outputting the second voltage V2. The fourth resistor R4has a first terminal coupled to the second terminal of the third resistor R3and a second terminal coupled to the ground voltage. Herein, the system voltage Vcc is an operation voltage or a standby voltage of the mother board100.

In summary, the switching unit in the mother board of the invention couples the connection port to the controller or the rapid charging initiation unit according to the switching signal. When the connection port is coupled to the rapid charging initiation unit, the first voltage and the second voltage of the rapid charging initiation unit are sent to the smartphone for activating the rapid charging function of the smartphone, so as to increase the charging speed of the smartphone.