CN201708692U - Power supply circuit board of monitor - Google Patents
Power supply circuit board of monitor Download PDFInfo
- Publication number
- CN201708692U CN201708692U CN2010201725462U CN201020172546U CN201708692U CN 201708692 U CN201708692 U CN 201708692U CN 2010201725462 U CN2010201725462 U CN 2010201725462U CN 201020172546 U CN201020172546 U CN 201020172546U CN 201708692 U CN201708692 U CN 201708692U
- Authority
- CN
- China
- Prior art keywords
- circuit board
- power supply
- supply circuit
- input
- sheet metal
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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- Shielding Devices Or Components To Electric Or Magnetic Fields (AREA)
- Structure Of Printed Boards (AREA)
Abstract
The utility model relates to the technical field of power supply devices of monitors, in particular to a power supply circuit board of a monitor, which comprises a circuit board; the circuit board is provided with an AC input end and an inverter part; a metal sheet is fixed on the circuit board, and is arranged between the AC input end and the inverter part; and the metal sheet is fixed on the circuit board between the AC input end and the inverter part and can play a shielding role, thereby eliminating peak interference wave in quite a large range formed in the conduction testing of a power supply.
Description
Technical field
The utility model relates to the display power supply device technical field, refers in particular to a kind of monitor power supply circuit board.
Background technology
We are in LCD of common on the market small-medium size (12 ~ 24 inches or more large scale) and LCD TV at present, its inner electric power system adopts Switching Power Supply mostly, the two-in-one power supply that Inverter (high-pressure section/inverter) combines, this type of two-in-one power supply is being EMC (Electro Magnetic Compatibility, when Electro Magnetic Compatibility) testing, if inverter drives transformer and power supply AC (alternating current, when interchange) the input distance was less than 40mm, the inversion part can form the spike disturbing wave that amplitude is bigger to the conduction test of power supply.At present, a lot of producers do not handle aforementioned interference problem basically.
Therefore, based on the defective of above-mentioned existing monitor power supply circuit board, need improve existing monitor power supply circuit board.
The utility model content
The purpose of this utility model is to provide a kind of monitor power supply circuit board at the deficiencies in the prior art, and the improved technical scheme of this monitor power supply circuit board is fairly simple, can effectively solve the problem of spike disturbing wave.
For achieving the above object, the utility model is achieved through the following technical solutions:
It comprises circuit board; Have AC input, inversion part on the circuit board; Be fixed with sheet metal on the circuit board; Sheet metal is between AC input, inversion part.
Described sheet metal ground connection.
Described inversion partly comprises contravariant transformer.
Described inversion partly comprises Connection Block, and Connection Block is electrically connected with contravariant transformer.
The distance of described AC input and inversion part is less than 40mm.
The beneficial effects of the utility model are: be fixed with sheet metal on the circuit board between AC input and the inversion part, sheet metal can play shielding action, has eliminated the bigger spike disturbing wave of amplitude that forms in the conduction test of power supply, and is simple and reliable.
Description of drawings
Fig. 1 is a structural representation of the present utility model;
Reference numeral:
10---circuit board;
20---the AC input;
30---contravariant transformer;
40---Connection Block;
50---sheet metal.
Embodiment
Below in conjunction with accompanying drawing the utility model is further described.
See Fig. 1, the utility model monitor power supply circuit board comprises: circuit board 10; Have AC input 20, inversion part on the circuit board 10; The distance of described AC input 20 and inversion part is less than 40mm; Be fixed with sheet metal 50 on the circuit board 10; Sheet metal 50 is between AC input 20, inversion part; Described sheet metal 50 ground connection; Be fixed with sheet metal 50 on the circuit board 10 between AC input 20 and the inversion part, sheet metal 50 can play shielding action, and with this sheet metal 50 circuit board 10 back side ground connection, eliminated the bigger spike disturbing wave of amplitude that forms in the conduction test of power supply, through the experimental demonstration to a plurality of two-in-one power supply machines, this kind mode is simple and reliable.
Wherein, described inversion partly comprises contravariant transformer 30; Described inversion part also comprises Connection Block 40, and Connection Block 40 is electrically connected with contravariant transformer 30.
As shown in FIG., the distance of contravariant transformer 30, Connection Block 40 and AC input 20 is all less than 40mm, therefore, fixing metal sheet 50 is to play shielding action on the circuit board 10 between contravariant transformer 30 and AC input 20, Connection Block 40 and the AC input 20, be convenient working, sheet metal 50 adopts the single piece type structure.
Certainly, the embodiment of the above, it is preferred embodiments of the present utility model, and unrestricted the utility model practical range, so all equivalences of doing according to the described structure of the utility model claim, feature and principle change or modify, and all should be included in the utility model claim.
Claims (5)
1. the monitor power supply circuit board comprises circuit board (10); Have AC input (20), inversion part on the circuit board (10); It is characterized in that: be fixed with sheet metal (50) on the circuit board (10); Sheet metal (50) is positioned between AC input (20), the inversion part.
2. monitor power supply circuit board according to claim 1 is characterized in that: described sheet metal (50) ground connection.
3. monitor power supply circuit board according to claim 2 is characterized in that: described inversion partly comprises contravariant transformer (30).
4. monitor power supply circuit board according to claim 3 is characterized in that: described inversion partly comprises Connection Block (40), and Connection Block (40) is electrically connected with contravariant transformer (30).
5. monitor power supply circuit board according to claim 1 is characterized in that: the distance of described AC input (20) and inversion part is less than 40mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010201725462U CN201708692U (en) | 2010-04-21 | 2010-04-21 | Power supply circuit board of monitor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010201725462U CN201708692U (en) | 2010-04-21 | 2010-04-21 | Power supply circuit board of monitor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201708692U true CN201708692U (en) | 2011-01-12 |
Family
ID=43445842
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010201725462U Expired - Fee Related CN201708692U (en) | 2010-04-21 | 2010-04-21 | Power supply circuit board of monitor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201708692U (en) |
-
2010
- 2010-04-21 CN CN2010201725462U patent/CN201708692U/en not_active Expired - Fee Related
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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 |
Granted publication date: 20110112 Termination date: 20150421 |
|
| EXPY | Termination of patent right or utility model |