CN201859606U - Displayer of minitype electromagnetic shielding cover - Google Patents
Displayer of minitype electromagnetic shielding cover Download PDFInfo
- Publication number
- CN201859606U CN201859606U CN2010205966063U CN201020596606U CN201859606U CN 201859606 U CN201859606 U CN 201859606U CN 2010205966063 U CN2010205966063 U CN 2010205966063U CN 201020596606 U CN201020596606 U CN 201020596606U CN 201859606 U CN201859606 U CN 201859606U
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- China
- Prior art keywords
- shielding cover
- input
- display
- circuit
- scaler chip
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- Expired - Lifetime
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- Shielding Devices Or Components To Electric Or Magnetic Fields (AREA)
- Devices For Indicating Variable Information By Combining Individual Elements (AREA)
Abstract
The utility model discloses a displayer of a minitype electromagnetic shielding cover, which comprises a circuit main board consisting of a top wiring and a bottom wiring, wherein the top wiring comprises a Scaler chip with a peripheral circuit, a Scaler chip power supply circuit and an outer signal interface, and input resistors and input signal wirings are sequentially connected between the outer signal interface and the peripheral circuit of the Scaler chip; and the displayer is characterized in that an electromagnetic shielding screen is covered above the outer signal interface, the input resistors and the input signal wirings. The displayer has the beneficial effects that due to the optimized design of the high speed signal and power supply signal wirings in a PCB, only the outer signal interface and the outer signal input circuit are covered, so that the design of the shielding cover is simplified, the area of an original shielding cover is greatly reduced by 60 percent, therefore the production cost of the displayer is greatly reduced.
Description
Technical field
The utility model relates to the display technology field, particularly relates to a kind of display of electro-magnetic shielding cover miniaturization Design.
Background technology
Continuous development along with science and technology, domestic electric appliances such as computing machine, televisor, video camera, camera are more and more universal in people's daily life, people often use a computer and understand the information of outside and learn, and computing machine has become people's indispensable ingredient of living.
At present, all be equipped with computing machine in most of family,, on display, shown then, realized the purpose that allows people learn and use by on main frame, storing a large amount of message files.
But display can produce electromagnetic radiation in work, human body is worked the mischief.Therefore each country has all formulated corresponding Electromagnetic Radiation Standards, comes the radiation intensity of managing electronic product, guarantees the health of human body.The manufacturing firm of display, has increased a lot of measures and has reduced electromagnetic radiation in display product in order to meet the standard of electromagnetic radiation, wherein just comprises electro-magnetic shielding cover, and this has caused the rising of cost and the increase of material simultaneously.
At present, in the display, circuit main board many (PCB) is two layers of wiring (top layer wiring and bottom wiring) structure, and its top layer wiring needs to use radome to carry out electromagnetic radiation and suppresses.
Referring to Fig. 1, radome 2 mainly comprises in the shield ranges of top layer wiring 1a: comprise the Scaler chip 3 of peripheral circuit, power-supplying circuit 4, external signal interface (DVI interface) 5 and the external signal interface input circuit of Scaler chip, externally comprise input resistance 6 and input signal cabling 7 in the signaling interface input circuit again, the radome shielding surface is bigger in the prior art, and cost is higher.
The utility model content
The utility model provides a kind of display to the electro-magnetic shielding cover miniaturization Design, the scope of electro-magnetic shielding cover only comprises external signal interface and external signal input circuit, dwindle the usable floor area of the electro-magnetic shielding cover of knowing clearly, greatly reduce the production cost of display.
A kind of display of miniaturized electric magnetic shielding cover, comprise the circuit main board that constitutes by top layer wiring and bottom wiring, wherein said top layer wiring comprises Scaler chip, Scaler chip power supply circuit, the external signal interface of being with peripheral circuit, externally be connected with input resistance and input signal cabling between the peripheral circuit of signaling interface and Scaler chip in turn, it is characterized in that, above described externally signaling interface, input resistance and input signal cabling, be covered with electro-magnetic shielding cover.
The electro-magnetic shielding cover of the utility model display, shield ranges only comprises input interface and input signal circuit, though under the situation that the radome area reduces, can reach the effect that reduces electromagnetic radiation intensity equally by formulation, meet the test specification of electromagnetic radiation top layer wiring and bottom wiring cabling rule.And can reduce the quantity of the conductive fabric that the bottom wired back contacts with the Panel betal can, further reduce cost.
Described bottom wiring is complete ground level with the corresponding zone of input signal cabling, the position that is the contiguous top layer wiring of bottom wiring input signal cabling will guarantee it is complete ground level, other circuit are not set, the purpose of doing like this is for high speed signal provides good return path, thereby reduces its intensity to space radiation.
The impedance of described input signal cabling is 100ohm, can guarantee the transmission line impedance coupling, reduces the reflection in the signal communication process, reduces radiation intensity.
Described input resistance is near the external signal interface arrangement, and resistance is 10ohm, under the condition of circuit and components and parts permission, with input resistance as much as possible near the external signal interface.Because input resistance can have certain decay to signal amplitude, thus to place near interface, can be so that signal can be with slightly little amplitude propagation on the PCB cabling.
In the described top layer wiring, be provided with power plane below the Scaler chip, the power pins of Scaler chip is connected with corresponding power plane.Power plane is placed under IC, and face is big as far as possible, like this can reducing noise voltage.Noise voltage equals the product that noise current and power supply are walked line impedence.
Under the constant situation of noise current, it is more little that power supply is walked line impedence, and power supply noise voltage is more little, and the designing power supply plane has just in time reduced the impedance of power supply cabling.
The beneficial effects of the utility model are by the optimal design to PCB high speed signal and power supply signal cabling, only external signal interface and external signal input circuit are covered, simplify the design of radome, original radome area is dwindled greatly, be about original 40%, thereby greatly reduce the production cost of display.
Description of drawings
Fig. 1 is the synoptic diagram of radome institute cover part main element during display circuit mainboard top layer connects up in the prior art.
Fig. 2 is the synoptic diagram of radome institute cover part main element in the wiring of the utility model display circuit mainboard top layer.
Fig. 3 is the synoptic diagram that is positioned at the power plane of Scaler chip below among Fig. 2, omits other elements among the figure;
Fig. 4 is a ground level distribution schematic diagram in the wiring of the utility model display circuit mainboard bottom.
Fig. 5 is the skeleton view of display circuit mainboard bottom wiring in the prior art, has only shown the distributing position of conductive fabric among the figure.
Embodiment
Referring to Fig. 2,3, the display of a kind of miniaturized electric magnetic shielding cover of the utility model comprises the circuit main board (PCB) that is made of top layer wiring 1a and bottom wiring 1b.
Wherein the end face of top layer wiring 1a (side of bottom wiring 1b dorsad) comprises Scaler chip 3, Scaler chip power supply circuit 4, the external signal interface 5 of being with peripheral circuit, externally be connected with input resistance 6 and input signal cabling 7 between the peripheral circuit of signaling interface 5 and Scaler chip in turn, only externally signaling interface 5, input resistance 6 and input signal cabling 7 tops are covered with electro-magnetic shielding cover 2.
The impedance of input signal cabling 7 is 100ohm.Input resistance 6 is arranged near external signal interface 5 as much as possible, and resistance is 10ohm.Eight input resistances are arranged among the figure, wherein the resistance of each input resistance is 10ohm, and the impedance of corresponding every pair of input signal cabling is 100ohm, and (the input signal cabling has eight, and per two signal wires are a pair of differential lines, totally four pairs, and every pair of differential lines impedance is 100ohm).
Be positioned at Scaler chip 3 belows in the described top layer wiring and be provided with power plane, be respectively 1.8V power plane 9 and 3.3V power plane 10 among the figure, the pin that Scaler chip 3 needs to insert power supply can directly be connected with corresponding power plane, has shortened wiring as much as possible.
Referring to Fig. 4, the conductive fabric that the back side of bottom wiring 1b contacts with the Panel betal can of display screen in the prior art generally has five, respectively in A, B, C, D, E position, and the electro-magnetic shielding cover area of the utility model display reduces greatly, and the test specification that meets electromagnetic radiation, therefore also can reduce the quantity of bottom conductive fabric, only conductive fabric is set, further reduce cost in two positions of C, D.
Claims (5)
1. the display of a miniaturized electric magnetic shielding cover, comprise the circuit main board that constitutes by top layer wiring and bottom wiring, wherein said top layer wiring comprises Scaler chip, Scaler chip power supply circuit, the external signal interface of being with peripheral circuit, externally be connected with input resistance and input signal cabling between the peripheral circuit of signaling interface and Scaler chip in turn, it is characterized in that, above described externally signaling interface, input resistance and input signal cabling, be covered with electro-magnetic shielding cover.
2. the display of miniaturized electric magnetic shielding cover as claimed in claim 1 is characterized in that, described bottom wiring is complete ground level with the corresponding zone of input signal cabling.
3. the display of miniaturized electric magnetic shielding cover as claimed in claim 2 is characterized in that, the impedance of described input signal cabling is 100ohm.
4. the display of miniaturized electric magnetic shielding cover as claimed in claim 3 is characterized in that, described input resistance is near the external signal interface arrangement, and resistance is 10ohm.
5. the display of miniaturized electric magnetic shielding cover as claimed in claim 4 is characterized in that, in the described top layer wiring, is provided with power plane below the Scaler chip, and the power pins of Scaler chip is connected with corresponding power plane.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010205966063U CN201859606U (en) | 2010-11-08 | 2010-11-08 | Displayer of minitype electromagnetic shielding cover |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010205966063U CN201859606U (en) | 2010-11-08 | 2010-11-08 | Displayer of minitype electromagnetic shielding cover |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201859606U true CN201859606U (en) | 2011-06-08 |
Family
ID=44105407
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010205966063U Expired - Lifetime CN201859606U (en) | 2010-11-08 | 2010-11-08 | Displayer of minitype electromagnetic shielding cover |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201859606U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102054396A (en) * | 2010-11-08 | 2011-05-11 | 天津三星电子显示器有限公司 | Miniaturized display with electromagnetic shielding case |
| CN117037636A (en) * | 2023-07-25 | 2023-11-10 | 北京睿智航显示科技有限公司 | Display module |
-
2010
- 2010-11-08 CN CN2010205966063U patent/CN201859606U/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102054396A (en) * | 2010-11-08 | 2011-05-11 | 天津三星电子显示器有限公司 | Miniaturized display with electromagnetic shielding case |
| CN102054396B (en) * | 2010-11-08 | 2013-01-30 | 天津三星电子有限公司 | Miniaturized display with electromagnetic shielding case |
| CN117037636A (en) * | 2023-07-25 | 2023-11-10 | 北京睿智航显示科技有限公司 | Display module |
| CN117037636B (en) * | 2023-07-25 | 2024-05-10 | 北京睿智航显示科技有限公司 | Display module |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| ASS | Succession or assignment of patent right |
Owner name: TIANJIN SANXING ELECTRONIC CO., LTD. Free format text: FORMER OWNER: SANSUNG ELECTRONIC DISPLAY CO., LTD., TIANJIN Effective date: 20111108 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20111108 Address after: 300385 micro industry zone, Xiqing economic and Technological Development Zone, Tianjin four Patentee after: Tianjin Sanxing Electronic Co., Ltd. Address before: 300385 micro industry zone, Xiqing economic and Technological Development Zone, Tianjin four Patentee before: Sansung Electronic Display Co., Ltd., Tianjin |
|
| AV01 | Patent right actively abandoned |
Granted publication date: 20110608 Effective date of abandoning: 20130227 |
|
| RGAV | Abandon patent right to avoid regrant |