CN100449516C - Peripheral device detection system and method thereof - Google Patents

Abstract

The invention provides a peripheral device detection system, which is used for detecting a peripheral device arranged on an electronic device. The peripheral device comprises a cable wire, and the cable wire is provided with M first leads, wherein the M first leads comprise a first detection lead. The peripheral device detection system comprises a connection port and a delay circuit. The connecting port is provided with M second leads, each second lead corresponds to one of the first leads of the cable, the M second leads comprise grounded second detection leads, and the second detection leads are used for responding to the first detection leads to generate voltage signals. The delay circuit is used for receiving the voltage signal and outputting a delay voltage signal to the electronic device after a preset delay time. Therefore, the electronic device starts to detect the peripheral device after receiving the delay voltage signal.

Description

Peripheral device detection system and method thereof

technical field

The present invention relates to a peripheral device detection system and method thereof, and in particular to a peripheral device detection system and method thereof which allow the electronic device to normally detect the peripheral device each time the peripheral device is connected to the docking station of the electronic device.

Background technique

Please refer to FIG. 1A . FIG. 1A is an appearance view of a docking station 1 and a notebook computer (Notebook) 2 in the prior art. For now, although the notebook computer 2 has the convenience of being portable, its function is not as good as that of a desktop computer (Desktop). Therefore, the expansion base (Docking station) 1 just is developed, provides the notebook computer 2 abundant peripheral connection port (Port), to install other peripheral device (Peripheral device), as printer (Printer), scanner ( Scanner) and so on.

Please refer to FIG. 1B . FIG. 1B is a schematic circuit diagram illustrating the connection between the docking station 1 and the notebook computer 2 in FIG. 1A . For example, when a user wants to use a printer with a notebook computer, he must connect the printer cable (Cable) to the print port (Printport) of the expansion base, and wait until the notebook computer detects the printer, then Use the notebook computer to operate the printing function. As shown in FIG. 1B, the printing connection port 10 of the existing expansion base 1 has 25 pins (Pin) P ₁ -P ₂₅ , wherein the 18th to 25th pins P ₁₈ -P ₂₅ are connected to the ground, and the 19 Lead wire P ₁₉ is used to detect whether the printer is plugged in. The cable of the existing printer (not shown in the figure) also has 25 leads, and each lead of the cable corresponds to one of the 25 leads P ₁ -P ₂₅ of the printing connection port 10 . When the 19th lead of the printer cable contacts the 19th lead P ₁₉ of the printing connection port 10, the printing connection port 10 will send a detection signal to notify the notebook computer 2 to detect the printer.

However, when the 19th lead wire of the printer cable is in contact with the 19th lead wire _P19 of the print connection port 10, other lead wires of the printer cable may not be in full contact with other lead wires of the print connection port 10, so that the printer cannot be used by the notebook. Type computer 2 detected, resulting in an identification error.

Therefore, the object of the present invention is to provide a peripheral device detection system and method thereof to solve the above problems.

Contents of the invention

One of the objects of the present invention is to provide a peripheral device detection system and its method. The peripheral device detection system uses a delay circuit to output the voltage signal used to notify the electronic device to start detecting the peripheral device, and then output it to the electronic device after a delay time. device. Thereby, when the electronic device receives the delayed voltage signal and starts to detect the peripheral device, all leads of the cable of the peripheral device have completely contacted all leads of the corresponding connection port, so that the electronic device can normally detect the peripheral device.

According to a preferred embodiment, the peripheral device detection system of the present invention is used to detect peripheral devices installed in electronic devices (Electronic apparatus). The peripheral device includes a cable, and the cable has M first pins, wherein the first detection pin is one of the M first pins, and M is a natural number. The peripheral device detection system includes a connection port (Port) and a delay circuit (Delay circuit). The delay circuit is coupled to the connection port.

In the above-mentioned embodiment, the connection port has M second leads, and each of the M second leads corresponds to one of the M first leads of the cable, wherein, N of the M second leads The two second leads are connected to the ground, the second detection lead is selected from one of the N second leads, and the second detection lead is used to respond to the first detection lead to generate a voltage signal, and N is a natural number. The delay circuit is used to receive the voltage signal and output the delayed voltage signal to the electronic device after a predetermined delay time, so that the electronic device starts to detect the peripheral device after receiving the delayed voltage signal.

Therefore, according to the peripheral device detection system of the present invention, since the delay circuit will output the voltage signal used to notify the electronic device to start detecting the peripheral device to the electronic device after a delay time, when the electronic device receives the delayed voltage signal and starts to detect When the peripheral device is installed, all leads of the cable of the peripheral device have completely contacted all leads of the corresponding connection ports, so that the electronic device can normally detect the peripheral device.

According to another preferred embodiment, the peripheral device detection method of the present invention is used to detect a peripheral device installed in an electronic device, the method includes the following steps: when the peripheral device is connected to the electronic device through a connection port When the device is installed, a voltage signal is generated on a lead of the connection port; the voltage signal is received through a delay circuit, and after a predetermined delay time, a delayed voltage signal is output; and the delayed voltage signal is received through the electronic device , and begin detecting the peripheral.

The advantages and spirit of the present invention can be further understood through the following detailed description of the invention and the accompanying drawings.

Description of drawings

FIG. 1A is an external view illustrating a docking station and a notebook computer in the prior art;

FIG. 1B is a schematic circuit diagram illustrating the connection between the docking station in FIG. 1A and the notebook computer;

FIG. 2 is a schematic circuit diagram illustrating the connection between the peripheral device detection system and the electronic device according to a preferred embodiment of the present invention; and

FIG. 3 is a flow chart of a peripheral device detection method according to a preferred embodiment of the present invention.

Description of reference symbols

1: Expansion base; 10, 30: Connection ports

2: Notebook computer; 3: Peripheral device detection system

32: Delay circuit; 4: Electronic device

S100-S104: Process steps

Detailed ways

Please refer to FIG. 2 . FIG. 2 is a schematic circuit diagram illustrating the connection between the peripheral device detection system 3 and the electronic device 4 according to a preferred embodiment of the present invention. The peripheral device detection system 3 of the present invention is used to detect peripheral devices (Peripheral device) (not shown in the figure) installed in the electronic device (Electronic apparatus) 4, such as printer (Printer), scanner (Scanner) etc. . In this embodiment, the peripheral device detection system 3 is set in an expansion base (not shown in the figure), and the expansion base is used to provide a peripheral connection port (Port) of the electronic device 4 to install other peripherals. device. In this embodiment, the electronic device 4 is a notebook computer (Notebook), and the peripheral device is a printer. The printer includes a cable, and the cable has 25 first pins, wherein the first detection pin is selected from one of the 25 first pins.

As shown in FIG. 2 , the peripheral device detection system 3 includes a connection port (Port) 30 and a delay circuit (Delay circuit) 32 , and the delay circuit 32 is coupled to the connection port 30 . The connection port 30 has 25 second leads P ₁ -P ₂₅ , and each second lead P ₁ -P ₂₅ corresponds to one of the 25 first leads of the printer cable. Eight second leads _P18 - _P25 of the twenty-five second leads _P1 - _P25 connected to the port 30 are connected to each other to ground, and the second sense lead _P19 is used to respond to the first sense lead of the printer cable ( That is, the 19th lead of the printer cable) to generate a voltage signal, wherein the voltage signal is a low voltage. The delay circuit 32 is used to receive the voltage signal, and output the delayed voltage signal to the electronic device 4 after a predetermined delay time. In this way, the electronic device 4 starts to detect the printer after receiving the delayed voltage signal.

Preferably, the predetermined delay time can be set to 0.82 seconds. After the electronic device 4 receives the delayed voltage signal, it takes about 0.226 seconds (the processing time of the operating system) to start detecting the printer. Therefore, when the first detection lead of the printer cable contacts the second detection lead _P19 of the connection port 30, the electronic device 4 will start to detect the printer after about 1 second (0.82 seconds+0.226 seconds=1.046 seconds).

In addition, in actual experiments, after the first detection lead wire of the printer cable contacts the second detection lead wire _P19 of the connection port 30, it usually takes about 0.3-0.8 seconds for the user to connect all of the printer cable wires. The leads are in full contact with all leads connected to the port 30 . In other words, after the first detection lead of the printer cable is in contact with the second detection lead _P19 of the connection port 30, there is about 1 second for the user to completely connect all the leads of the printer cable to all the lead wires of the connection port 30. touch. In this way, every time the printer is connected to the docking station of the electronic device 4, the electronic device 4 can normally detect the printer.

It should be noted that the circuit of the delay circuit 32 may have different designs according to actual applications, thereby generating different predetermined delay times.

Please refer to FIG. 3 . FIG. 3 is a flowchart of a peripheral device detection method according to a preferred embodiment of the present invention. Please also refer to FIG. 2 , the peripheral device detection method of the present invention is used to detect the peripheral devices installed in the electronic device 4 . According to this preferred embodiment, the peripheral device detection method of the present invention includes the following steps:

Step S100: generating a voltage signal when the peripheral device is connected to the electronic device;

Step S102: receiving a voltage signal, and outputting a delayed voltage signal after a predetermined delay time;

Step S104: Receive the delayed voltage signal, and start to detect the peripheral device.

Compared with the prior art, according to the peripheral device detection system and method thereof of the present invention, since the delay circuit will output the voltage signal used to notify the electronic device to start detecting the peripheral device to the electronic device after a delay time, when the electronic device When the device receives the delayed voltage signal and starts to detect the peripheral device, all leads of the cable of the peripheral device are in full contact with all leads of the corresponding connection ports, so that the electronic device can normally detect the peripheral device.

Through the above detailed description of the preferred embodiments, it is hoped that the characteristics and spirit of the present invention can be described more clearly, and the scope of the present invention is not limited by the preferred embodiments disclosed above. On the contrary, the intention is to cover various changes and equivalent arrangements within the scope of the claimed invention. Therefore, the scope of the claimed scope of the present invention should be interpreted in the broadest way based on the above description, so as to cover all possible changes and equivalent arrangements.

Claims (10)

1. peripheral device detecting system, be installed in a peripheral unit of an electronic installation in order to detection, this peripheral unit comprises a cable, this cable has M first lead-in wire, one first detection lead-in wire is to be selected from this M first one of them that goes between, M is a natural number, and this peripheral device detecting system comprises:

One connectivity port, have M second lead-in wire, each this M second lead-in wire goes between with this M individual first respectively, and one of them is corresponding, N second lead-in wire in individual second lead-in wire of this M is interconnected to ground, one second detection lead-in wire is to be selected from this N individual second to go between one of them, this second detection lead-in wire is to go between in order to respond this first detection, and to produce a voltage signal, N is a natural number; And

One delay circuit couples mutually with this connectivity port, in order to receive this voltage signal, and behind a scheduled delay, export a delay voltage signal to this electronic installation, by this, this electronic installation promptly begins to detect this peripheral unit after receiving this delay voltage signal.

2. peripheral device detecting system as claimed in claim 1, wherein, this voltage signal is a low-voltage.

3. peripheral device detecting system as claimed in claim 1, wherein, this scheduled delay is 0.82 second.

4. peripheral device detecting system as claimed in claim 1, wherein, this electronic installation is a notebook computer.

5. peripheral device detecting system as claimed in claim 1, wherein, this peripheral unit is a printer.

6. peripheral unit detection method is installed in a peripheral unit of an electronic installation in order to detection, and this method comprises the following step:

When this peripheral unit is connected in this electronic installation by a connectivity port, on a lead-in wire of this connectivity port, produce a voltage signal;

Receive this voltage signal by a delay circuit, and behind a scheduled delay, export a delay voltage signal; And

Receive this delay voltage signal by described electronic installation, and begin to detect this peripheral unit.

7. method as claimed in claim 6, wherein, this voltage signal is a low-voltage.

8. method as claimed in claim 6, wherein, this scheduled delay is 0.82 second.

9. method as claimed in claim 6, wherein, this electronic installation is a notebook computer.

10. method as claimed in claim 6, wherein, this peripheral unit is a printer.

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