WO2019056853A1

WO2019056853A1 - Set-top box tuner protection device and protection method

Info

Publication number: WO2019056853A1
Application number: PCT/CN2018/097427
Authority: WO
Inventors: 葛丽博
Original assignee: 深圳市九洲电器有限公司
Priority date: 2017-09-21
Filing date: 2018-07-27
Publication date: 2019-03-28
Also published as: CN107645641A; CN107645641B

Abstract

The present solution relates to a set-top box Tuner protection device and a protection method, the protection device comprising: a permanent protection inductor, a backup protection inductor, a control switch and a voltage detection unit. The present solution configures the permanent protection inductor and the backup protection inductor at a Tuner interface for dual protection, the permanent protection inductor carrying out common protection, and the backup protection inductor carrying out secondary protection in case of abnormalities so as to fully and effectively protect a set-top box Tuner when the Tuner is hit by the high energy of lightning, thus preventing damage or destructive damage to the Tuner, and preventing safety incidents from occurring, while not posing a risk to set-top boxes or users.

Description

Set-top box Tuner protection device and protection method

Technical field

The solution relates to a digital television device, in particular to a set top box Tuner protection device and a protection method.

Background technique

As a product that receives TV signals, the set-top box has a wide user base. In the underdeveloped areas of the cable network, the need for a set-top box with a Tuner is more prominent. As the receiver of the TV signal, Tuner is the channel connecting the external signal to the main chip of the set-top box, and is one of the indispensable interfaces of the cable set-top box.

During the use of the set-top box with Tuner, Tuner transmits the TV signal to the set-top box through the signal line. Due to the need to connect the signal line exposed to the outside, this will increase the possibility of Tuner being struck by lightning, if Tuner receives high lightning strike energy. In its own resistive energy, it will cause certain damage to Tuner, and the signal will be interrupted. In addition, the Burner part will burn out and cause Tuner's devastating damage. It may even cause fire and cause a safety accident. This is for the set-top box. And the user brings great risks.

technical problem

The purpose of the solution is to provide a set top box Tuner protection device and a protection method, aiming at solving the problem that the set top box Tuner may be subjected to lightning strikes, posing a risk.

Technical solution

The first aspect of the solution provides a set top box Tuner protection device, comprising: a permanent protection inductor, a backup protection inductor, a control switch and a voltage detection unit; the permanent protection inductor is connected at one end to the Tuner interface, and the other end is grounded, the standby protection inductor One end of the control switch is connected to one end, the other end is grounded, the other end of the control switch is connected to the Tuner, and the connection is located behind the connection of the permanent protective inductor and the Tuner interface, and the voltage detecting unit is connected with the Tuner and set Between the standing protection inductor and the control switch, detecting the voltage at the connection in real time, if the voltage at the connection is greater than a preset value, closing the control switch to turn on the standby protection inductor, otherwise the control switch disconnect.

In one of the embodiments, the permanent protective inductor and the backup protective inductor each employ an air-core coil inductor.

In one of the embodiments, one end of the permanent protective inductor is connected to the RF signal pin of the Tuner interface.

In one of the embodiments, the permanent protective inductor and the backup protective inductor employ a plug-in inductor.

In one embodiment, the coil conductor of the permanent protective inductor has a diameter of 0.4 mm, a coil of 2.2 mm, and a coil number of 17; the spare protective inductor coil has a diameter of 0.3 mm, a coil of 2.2 mm, and a coil number of 9 .

The second aspect of the solution provides a method for protecting a set top box Tuner, comprising the following steps:

S10: setting a permanent protection inductor, the one end of the permanent protection inductor is connected to the Tuner interface, and the other end is grounded;

S20: setting a backup protection inductor and a control switch, one end of the standby protection inductor is connected to one end of the control switch, the other end is grounded, the other end of the control switch is connected to the Tuner, and the connection is at the permanent protective inductor and the Tuner interface The rear of the joint;

S30: setting a voltage detecting unit, connecting with the Tuner and setting between the permanent protective inductor and the control switch, detecting the voltage at the connection in real time, and if the voltage at the connection is greater than a preset value, closing the control switch, turning on the Spare protection inductance, otherwise the control switch will be disconnected.

Beneficial effect

The set-top box Tuner protection device and protection method provided by the solution are provided with a permanent protection inductor and a backup protection inductor at the Tuner interface for double protection, the permanent protection inductor is subjected to normal protection, and the secondary protection is performed by the backup protection inductor in the event of an abnormal situation. Therefore, when the Tuner is subjected to lightning strike high energy, the set-top box Tuner can be fully and effectively protected from damage or catastrophic damage to the Tuner, avoiding a safety accident and not posing a risk to the set-top box and the user.

DRAWINGS

Figure 1 is a structural view of a set top box Tuner protection device in an embodiment;

2 is a flow chart of a method for protecting a set top box Tuner in an embodiment.

Embodiments of the invention

In order to make the technical problems, technical solutions and beneficial effects to be solved by the present solution more clear, the present embodiment will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and are not intended to be limiting.

1 is a structural view of a set top box Tuner protection device in an embodiment. As shown in FIG. 1, the protection device includes a permanent protection inductor 100, a backup protection inductor 200, a control switch 300, and a voltage detection unit 400. One end of the permanent protective inductor 100 is connected to the Tuner interface and the other end is grounded. One end of the backup protection inductor 200 is connected to one end of the control switch 300, the other end is grounded, and the other end of the control switch 300 is connected to the Tuner, and the connection is at the rear of the connection between the permanent protective inductor 100 and the Tuner interface. The voltage detecting unit 400 is connected to the Tuner and disposed between the permanent protective inductor 100 and the control switch 300 to detect the voltage at the connection in real time. If the voltage at the connection is greater than the preset value, the control switch 300 is closed to turn on the standby protective inductor 200. Otherwise, the control switch 300 is disconnected (if the voltage at the junction of the voltage detecting unit 400 and the Tuner is greater than a preset value, it means that the Tuner has suffered a very large voltage, and the permanent protective inductor 100 cannot be completely protected, and the control switch 300 is required. The backup protection inductor 200 is closed to prevent the Tuner from being damaged by a large voltage. If the voltage at the connection between the voltage detection unit 400 and the Tuner is not greater than a preset value, the backup protection inductor 200 does not need to be activated, and the control switch 300 is turned off.

In this embodiment, both the permanent protective inductor 100 and the backup protective inductor 200 employ an air-core coil inductor. One end of the permanent protective inductor 100 is connected to the RF signal (video signal) pin of the Tuner interface.

According to the requirements of the Tuner (Layout) layout, the distance between the permanent protection inductor 100 and the Tuner interface RF signal pin needs to be very close, so the permanent protection inductor 100 and the backup protection inductor 200 use the plug-in inductor to prevent the heat generated by the strong lightning strike. Melt, causing problems such as short circuits.

Due to the inductance of the same sense value, the inductor with the larger wire diameter is more resistant to strong lightning strikes, so the permanent protective inductor 100 uses a large wire diameter inductor, and the backup protective inductor 200 uses a small wire diameter inductor. Further, the coil conductor of the permanent protective inductor 100 has a diameter of 0.4 mm (mm), a coil of 2.2 mm, and a coil number of 17. The backup protective inductor 200 has a coil wire diameter of 0.3 mm, a coil of 2.2 mm, and a coil number of 9.

The set-top box Tuner protection device is provided with a permanent protection inductor 100 and a backup protection inductor 200 at the Tuner interface for double protection, and the permanent protection inductor 100 performs normal protection, and the secondary protection inductor 200 performs secondary protection in the event of an abnormal situation, thereby When Tuner is struck by lightning and high energy, it protects the set-top box Tuner effectively, avoiding damage or devastating damage to Tuner, avoiding safety accidents, and not posing risks to set-top boxes and users.

In addition, the solution also provides a set top box Tuner protection method, as shown in FIG. 2, the protection method includes the following steps:

S10: Set the permanent protection inductor. One end of the permanent protection inductor is connected to the Tuner interface, and the other end is grounded.

S20: Set the backup protection inductor and the control switch. One end of the backup protection inductor is connected to one end of the control switch, the other end is grounded, and the other end of the control switch is connected to the Tuner, and the connection is located behind the connection of the permanent protective inductor and the Tuner interface.

S30: setting a voltage detecting unit, connecting with the Tuner and setting between the standing protective inductor and the control switch, detecting the voltage at the connection in real time, and if the voltage at the connection is greater than a preset value, the control switch is closed, and the standby protective inductor is turned on. Otherwise the control switch is turned off.

If the voltage at the junction of the voltage detection unit and the Tuner is greater than the preset value, it means that the Tuner is subjected to a very large voltage, the permanent protective inductor cannot be fully protected, and the control switch needs to be closed to enable the backup protective inductor to prevent the Tuner from being damaged by a large voltage. If the voltage of the voltage detecting unit and the connection is not greater than the preset value, it is not necessary to enable the standby protective inductor, and the control switch is turned off).

In this embodiment, both the permanent protective inductor and the backup protective inductor use an air-core coil inductor. One end of the permanent protective inductor is connected to the RF signal (video signal) pin of the Tuner interface.

According to the requirements of the Tuner (Layout) layout, the distance between the permanent protective inductor and the Tuner interface RF signal pin needs to be very close, so the permanent protective inductor and the backup protective inductor use plug-in inductors to prevent the heat generated by the strong lightning strike from melting the tin, resulting in Short circuit and other issues.

Due to the inductance of the same sense value, the inductor with a larger wire diameter is more resistant to strong lightning strikes, so the permanent protective inductor uses a large wire diameter inductor, and the backup protective inductor uses a small wire diameter inductor. Further, the coil conductor of the permanent protective inductor has a diameter of 0.4 mm, the inner diameter of the coil is 2.2 mm, and the number of coil turns is 17. The spare protective inductor coil wire diameter is 0.3mm, the inner diameter of the coil is 2.2mm, and the number of turns of the coil is 9.

The set-top box Tuner protection method is provided with a permanent protection inductor and a backup protection inductor at the Tuner interface for double protection, and the permanent protection inductor is subjected to normal protection, and secondary protection is performed by the backup protection inductor in the event of an abnormal situation, thereby being struck by lightning in the Tuner High-energy, fully protect the set-top box Tuner, avoiding damage or devastating damage to the Tuner, avoiding safety accidents, and not posing risks to the set-top box and users.

The above is only the preferred embodiment of the present solution, and is not intended to limit the present solution. Any modifications, equivalent replacements, and improvements made within the spirit and principles of the present solution should be included in the scope of protection of the present solution. Inside.

Claims

A set top box Tuner protection device, comprising: a permanent protection inductor, a backup protection inductor, a control switch and a voltage detection unit; the permanent protection inductor has one end connected to the Tuner interface, the other end is grounded, and the standby protection inductor is connected at one end. One end of the control switch is connected to the other end, the other end of the control switch is connected to the Tuner, and the connection is located behind the connection between the permanent protective inductor and the Tuner interface, and the voltage detecting unit is connected to the Tuner and disposed in the Between the standing protection inductor and the control switch, the voltage at the connection is detected in real time. If the voltage at the connection is greater than the preset value, the control switch is closed, and the standby protection inductance is turned on, otherwise the control switch is turned off.
The set top box Tuner protection device according to claim 1, wherein the standing protection inductor and the backup protection inductor each adopt an air core coil inductor.
The set top box Tuner protection device according to claim 2, wherein one end of the permanent protective inductor is connected to an RF signal pin of the Tuner interface.
The set top box Tuner protection device according to claim 3, wherein the permanent protective inductor and the backup protective inductor are plug-in inductors.
The set top box Tuner protection device according to claim 4, wherein the coil conductor of the permanent protective inductor has a diameter of 0.4 mm, a coil of 2.2 mm, and a coil number of 17; the spare protective inductor coil has a diameter of 0.3 mm, and the coil The inner diameter is 2.2mm, and the number of turns is 9.
A set top box Tuner protection method, comprising the following steps:

S10: setting a permanent protection inductor, the one end of the permanent protection inductor is connected to the Tuner interface, and the other end is grounded;

S20: setting a backup protection inductor and a control switch, one end of the standby protection inductor is connected to one end of the control switch, the other end is grounded, the other end of the control switch is connected to the Tuner, and the connection is at the permanent protective inductor and the Tuner interface The rear of the joint;

S30: setting a voltage detecting unit, connecting with the Tuner and setting between the permanent protective inductor and the control switch, detecting the voltage at the connection in real time, and if the voltage at the connection is greater than a preset value, closing the control switch, turning on the Spare protection inductance, otherwise the control switch will be disconnected.
The set top box protection method according to claim 6, wherein the permanent protective inductor and the backup protective inductor each adopt an air-core coil inductor.
The set top box protection method according to claim 7, wherein one end of the permanent protective inductor is connected to an RF signal pin of the Tuner interface.
The set top box protection method according to claim 8, wherein the standing protection inductor and the backup protection inductor adopt a plug-in inductor.
The method according to claim 9, wherein the coil conductor of the permanent protective inductor has a diameter of 0.4 mm, a coil of 2.2 mm, and a coil number of 17; the spare protective inductor coil has a diameter of 0.3 mm, and the coil The inner diameter is 2.2mm, and the number of turns is 9.