CN202340290U - Set top box with isolation function for digital television - Google Patents
Set top box with isolation function for digital television Download PDFInfo
- Publication number
- CN202340290U CN202340290U CN2011205325675U CN201120532567U CN202340290U CN 202340290 U CN202340290 U CN 202340290U CN 2011205325675 U CN2011205325675 U CN 2011205325675U CN 201120532567 U CN201120532567 U CN 201120532567U CN 202340290 U CN202340290 U CN 202340290U
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- capacitor
- television
- top box
- set top
- stb
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Abstract
The utility model discloses a set top box with an isolation function for a digital television. The set top box comprises an RGA socket which is connected with the television and an F plug which is connected with a coaxial network; a television signal input to the F plug from the coaxial network and the paired shield ground are respectively connected with a capacitor C3 and a capacitor C4; and a signal output to the television and the paired shield ground are respectively connected with a capacitor C1 and a capacitor C2. The set top box with the isolation function for the digital television can be used for solving the problems of high-voltage interference between the television and the set top box and the radio and television network as well as the current noise, fluctuating images, hand anaesthesia of the shell, lightening stroke and the like of the televisions of users.
Description
Technical field
The utility model relates to DTV STB, specifically is meant a kind of DTV STB with isolation features.
Background technology
The normally same power line of the coaxial network of cable TV, the shared electric pole of telephone wire, through the transmission of long distance, possibly sense higher voltage, touch electric leakage lead, sense various reasons such as thunder and lightning and all can cause camera cable charged.If camera cable passes to high-tension electricity in the users home, this interference gently then causes television image distortion, horizontal stripe, reticulate pattern and sound grunt etc., and is heavy then can cause the damage of electrical equipment such as television set, STB.
When the logical STB of TV connects; Because TV and STB generally all are the attaching plugs of bipod, ground connection is not fine, and two equipment is because when aging; Can there be certain alternating current potential difference; When STB is connected with TV, may cause the audio frequency and video circuit to cause permanent damage because of high pressure, serious even can cause TV on fire.
If can seek a kind of method, STB, TV, coaxial network are isolated, even certain equipment is charged because of certain reason,, also be unlikely to influence each other because equipment room does not have physical link.
The utility model content
The purpose of the utility model provides a kind of DTV STB that solves TV to high-tension electricity between STB and the CHINA RFTCOM Co Ltd problem of disturbing and the band isolation features that can effectively solve problems such as current noise on user's TV, image fluctuation, shell fiber crops hand, thunderbolt.
The utility model can be realized through following technical scheme:
The utility model discloses a kind of DTV STB with isolation features; Comprise RGA socket that is connected with television set and the F head that is connected with coaxial network; The shielding that is input to TV signal and pairing thereof on the F head from coaxial network is connected with capacitor C 3, C4 on the ground respectively, is connected with capacitor C 1, C2 on the ground respectively in the shielding of the signal of exporting to TV and pairing thereof.
Preferably, described capacitor C 1, C2, C3, C4 hold for holding discharge.
Preferably, the size of described capacitor C 1, C2, C3, C4 is 8～30uf.
Further improve, be connected with anti-thunder tube VD between the TV signal of described F head input and the shielding ground of pairing thereof.
Preferably, described anti-thunder tube VD is a gas discharge tube.
The DTV STB of the utility model band isolation features is through being connected with suitable electric capacity on the output of RGA socket and F head and input television signal; And also be connected with suitable electric capacity on the ground with the shielding of its pairing; Between the shielding ground of F head input television signal and pairing thereof, be connected with anti-thunder tube; Can just STB, TV, coaxial network be isolated effectively; Solve TV to the problem that high-tension electricity between STB and the CHINA RFTCOM Co Ltd disturbs, can effectively solve problems such as current noise on user's TV, image fluctuation, shell fiber crops hand, thunderbolt.
Description of drawings
Accompanying drawing 1 is the connection sketch map that the signal of the DTV STB of the utility model band isolation features is exported;
Accompanying drawing 2 is the connection sketch map that the signal of the DTV STB of the utility model band isolation features is imported.
Embodiment
To combine Figure of description to come the utility model is further described below:
Show like Fig. 1; The utility model discloses a kind of DTV STB with isolation features; Comprise the RGA socket that is connected with television set; All shielding ground of exporting to signal and the pairing thereof of TV of STB are connected with capacitor C 1, C2 respectively, all pass through suitable capacitor C 1, C2 and export to TV again.Described capacitor C 1, C2 hold for holding discharge.The size of described capacitor C 1, C2 is 8～30uf.
Show like Fig. 2, comprise the F head that is connected with coaxial network, the shielding that is input to TV signal and pairing thereof on the F head from coaxial network is connected with capacitor C 3, C4 on the ground respectively.Described capacitor C 3, C4 hold for holding discharge.The size of described capacitor C 3, C4 is 8～30uf.
Be connected with anti-thunder tube VD between the TV signal of described F head input and the shielding ground of pairing thereof.Described anti-thunder tube VD is a gas discharge tube.
Accomplish desirable isolation according to the utility model principle, mainly need PCB design and the dual measure of structural design.During the PCB design, audio frequency and video output port and F head will independently be cut apart, and accomplish complete cutting apart.Will avoid the shell of RCA socket and F head and the housing contacts of STB on the structural design, preferably the requirement according to high pressure in the 3C standard and low-pressure section safe spacing is provided with protection, accomplishes reliable isolation.
Through actual measurement, can effectively solve the problems such as numb hand that the alternating current potential difference causes between distinct device, the hidden danger of avoiding STB and TV Room ac voltage difference to cause video circuit to burn out.
Simultaneously, can solve major part, obviously reduce fraction defective because of the burning machine phenomenon that thunderbolt causes at the anti-thunder tube of tuner with increase on coaxial network is connected.
The above is merely the preferred embodiment of the utility model, is not the utility model is done any pro forma restriction; But the those of ordinary skill of all industry is all implemented the utility model with the above shown in the by specification accompanying drawing swimmingly; But all professional and technical personnel of being familiar with the above technology contents that is disclosed capable of using and a little change of making, modify the equivalent variations with differentiation in not breaking away from the utility model technical scheme scope, be the equivalent embodiment of the utility model; Simultaneously, all essence technology according to the utility model to the change of any equivalent variations that above embodiment did, modify with differentiation etc., all still belong within the protection range of technical scheme of the utility model.
Claims (5)
1. DTV STB with isolation features; Comprise RGA socket that is connected with television set and the F head that is connected with coaxial network; It is characterized in that: the shielding that is input to TV signal and pairing thereof on the F head from coaxial network is connected with capacitor C 3, C4 on the ground respectively, is connected with capacitor C 1, C2 on the ground respectively in the shielding of the signal of exporting to TV and pairing thereof.
2. the DTV STB of band isolation features according to claim 1 is characterized in that: described capacitor C 1, C2, C3, C4 hold for holding discharge.
3. the DTV STB of band isolation features according to claim 1 and 2 is characterized in that: the size of described capacitor C 1, C2, C3, C4 is 8～30uf.
4. the DTV STB of band isolation features according to claim 3 is characterized in that: be connected with anti-thunder tube VD between the TV signal of described F head input and the shielding ground of pairing thereof.
5. the DTV STB of band isolation features according to claim 4 is characterized in that: described anti-thunder tube VD is a gas discharge tube.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011205325675U CN202340290U (en) | 2011-12-19 | 2011-12-19 | Set top box with isolation function for digital television |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011205325675U CN202340290U (en) | 2011-12-19 | 2011-12-19 | Set top box with isolation function for digital television |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202340290U true CN202340290U (en) | 2012-07-18 |
Family
ID=46488972
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011205325675U Expired - Fee Related CN202340290U (en) | 2011-12-19 | 2011-12-19 | Set top box with isolation function for digital television |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202340290U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103633991A (en) * | 2013-11-20 | 2014-03-12 | 四川九州电子科技股份有限公司 | Circuit for performing direct current voltage insulation and isolation on wired network antenna coaxial socket |
| CN106210595A (en) * | 2012-11-22 | 2016-12-07 | 江苏华兴电子有限公司 | For guaranteeing the antenna isolator of high-frequency signal transmission quality |
| CN107021035A (en) * | 2017-03-24 | 2017-08-08 | 青岛海信电器股份有限公司 | Vehicular display device and in-vehicle display system |
-
2011
- 2011-12-19 CN CN2011205325675U patent/CN202340290U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106210595A (en) * | 2012-11-22 | 2016-12-07 | 江苏华兴电子有限公司 | For guaranteeing the antenna isolator of high-frequency signal transmission quality |
| CN106210595B (en) * | 2012-11-22 | 2018-12-07 | 江苏华兴电子有限公司 | For ensuring the antenna isolator of high-frequency signal transmission quality |
| CN103633991A (en) * | 2013-11-20 | 2014-03-12 | 四川九州电子科技股份有限公司 | Circuit for performing direct current voltage insulation and isolation on wired network antenna coaxial socket |
| CN103633991B (en) * | 2013-11-20 | 2016-09-28 | 四川九州电子科技股份有限公司 | Cable network antenna coaxial socket is carried out the circuit of direct current voltage insulation isolation |
| CN107021035A (en) * | 2017-03-24 | 2017-08-08 | 青岛海信电器股份有限公司 | Vehicular display device and in-vehicle display system |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120718 Termination date: 20181219 |