CN2488102Y - High-frequency interference resisting apparatus for person digital aid - Google Patents
High-frequency interference resisting apparatus for person digital aid Download PDFInfo
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- CN2488102Y CN2488102Y CN 01228851 CN01228851U CN2488102Y CN 2488102 Y CN2488102 Y CN 2488102Y CN 01228851 CN01228851 CN 01228851 CN 01228851 U CN01228851 U CN 01228851U CN 2488102 Y CN2488102 Y CN 2488102Y
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- pda
- personal digital
- digital aid
- high frequency
- frequency interference
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Abstract
The utility model is a high-frequency interference resisting apparatus for person digital aid, which is characterized in that each electric wire of bus cable of the main board of the person digital aid is connected with an inductance component to block high frequency signal. The bus cable is electrically connected with the drive mould of the liquid crystal display board of person digital aid by electric property.
Description
Technical field
The utility model relates to a kind of device that reduces Electromagnetic Interference, particularly a kind of anti-high frequency interference device that is used for personal digital aid (PDA).
Background technology
Constantly development is with progressive along with electronics technology, and electronic product miscellaneous is all towards digital development.And, in order to meet the demand of portability and practicality, on the design specification of electronic product, all tend to directions compact, that function is many and processing speed is fast and develop, so that the product of making can carry easilier, and more meet modern life requirement.Particularly after multimedia computer was propagated its belief on a large scale, powerful operation capacity can be handled digital materials such as various audios, image, pattern easily.Related make the peripheral equipment relevant, also be subjected to developing widely and utilization with image.For example, personal digital aid (PDA), digital sound, scanner, digital camera or the like.
For example, with at present very popular PDA system (Personal Digital Assistant, PDA), just be convenient for carrying owing to it, can handle a large amount of digital information, and can obtain real time information, therefore be subjected to society and generally like and use by relevant communication device.Particularly along with the development of integrated circuit technique, PDA system has more powerful calculation function, and memory span constantly increases, and is with more and more many application software, data bank ... all be stored in small and exquisite PDA system.And integrated through Internet and communication system, and make personal digital aid (PDA) have the function of multimedia.
Yet because personal digital aid (PDA), not only integrated circuit is intensive in a circuit board, and liquid crystal display screen and driver thereof also are integrated in one simultaneously, and both are stacked in a small space via the winding displacement connection again.Therefore, when the liquid crystal display screen scanning linear scans, if therefore produce some noise frequency, these noise frequencies will make small space be full of various frequencies by frequency multiplication, frequency tripling, quadruple and higher frequency multiplication, the result who so derives will be the problem that generates electromagnetic waves and disturb, if do not manage to remove, reading of data will be influenced.Particularly for the personal digital aid (PDA) of a new generation, owing to have the function of wireless transmission more, the influence that above-mentioned various frequency, high frequency noise are mingled with, not only the reception of PDA data, transmission are caused interference, more because the problem of electromagnetic-wave leakage, and the electronic product of influence periphery, so the problems referred to above can not be ignored.
Summary of the invention
As described in technical background, personal digital aid (PDA) is because volume is little, and associated component is many, comprise LCD display panel, LCD driving circuit, the main frame motherboard (comprises CPU (central processing unit), module is handled in storer, relevant telecommunication, communication module group all is integrated in one, therefore, not only because of the LCD driving circuit, when providing scanning linear to scan, to cause because of associated component is integrated in one, and, will make various frequency noises be full of electronic installation by 1 frequency multiplier, 2 frequency multipliers, 3 frequency multipliers or higher frequency multiplier in PDA as long as there is some noise to produce.Not only the reception of PDA data, transmission are caused interference, more because the problem of electromagnetic-wave leakage, and the electronic product of influence periphery, for overcoming above-mentioned electromagnetic interference (EMI), the utility model will propose relevant apparatus, in order to elimination the problems referred to above.Therefore, technical problem to be solved in the utility model is the above-mentioned deficiency at prior art, and proposes a kind of anti-high frequency interference device that is used for personal digital aid (PDA), uses the sensitivity (signal to noise ratio) that improves personal digital aid (PDA).
Above-mentioned technical matters of the present utility model is solved by following technical scheme:
A kind of anti-high frequency interference device that is used for personal digital aid (PDA), it is characterized in that: each electrical lead of the busbar wire of this personal digital aid (PDA) motherboard connects an inductance element respectively, in order to the blocking-up high-frequency signal, the display panels that this busbar wire electrically connects this personal digital aid (PDA) drives module and this motherboard.
Except that above-mentioned essential features, in specific implementation process, also can replenish following technology contents:
One mask cover this inductance element, part electrical lead, and above-mentioned motherboard comprise the part of central processing unit element, leak in order to intercept the electromagenetic wave radiation that element produced that this shield covers.
The surface-mounted integrated circuit of this personal digital aid (PDA) prevents further that in the metal forming of inside surface electromagnetic wave from leaking with the coating insulation film.
Wherein this surface-mounted integrated circuit is this motherboard, and this metal forming is that front and part electrical lead that this motherboard contains chip and these a plurality of inductance elements are covered.
Wherein this surface-mounted integrated circuit is to show the panel driving module for this white.
Wherein this metal forming is to be Copper Foil.
Wherein this metal forming is to be aluminium foil.
The utility model discloses a kind of anti-high frequency interference device that is used for personal digital aid (PDA) that has, this personal digital aid (PDA) comprises display panels, drive circuit die set, pixel signal, a motherboard in order to drive this display panels, this motherboard comprises central processing unit, signal process chip and storer, this motherboard also comprises a busbar wire at least, to electrically connect this drive circuit die set; And a plurality of inductance elements are connected to each lead of this busbar wire.
Because the small inductance element has the High frequency filter effect, therefore can disturb in order to the high frequency noise of filtering from drive circuit die set, in addition, the high frequency noise that motherboard produces also can be unlikely via above-mentioned inductance element filtering and be passed to drive circuit die set, and make that the high frequency noise problem of interfering with each other is solved, and promote sensitivity (signal to noise ratio).
The utlity model has following advantage:
Only need can bring into play the effect that increases by one times of sensitivity at the adding small inductor element of bus-bar.
Description of drawings
Fig. 1 is a device relevant position synoptic diagram, and showing provides masking device and the drive circuit board that is installed in motherboard according to the utility model.
Fig. 2 is added on the situation that is connected busbar wire on motherboard and the drive circuit board for inductance element.
Fig. 3 is for using the related data that the utility model embodiment tests in PDA system.
Embodiment
About detailed description of the present utility model and related embodiment as described below.
The disclosed device of the utility model except above-mentioned personal digital aid (PDA), also can be applicable to other devices relevant with the data transmission and the tool display panel.What specify is, understands feature of the present utility model and related application method for convenience, only describes for example with regard to PDA system (PDA) in the following embodiments.But this description partly is not in order to limiting application range of the present utility model, in utilizing invention of the present utility model spiritual, and the utility model case that makes an amendment, should still belong to scope of the present utility model as reason.
Please refer to Fig. 1 is example with at present typical PDA system, except display panel 20, drive circuit board 22 and a motherboard 10, motherboard is given information and Signal Processing, utilizes drive circuit board 22 position accurate signal and data signal that display pixel is relative to be shown on the display panel 20 again.Motherboard generally comprises a central processing unit, storer, with data, signal process chip.With popular at present money stock machine, the operating frequency of central processing unit be at tens of MHz, send a telegraph magnetic wave and reveal various frequencies generations and the interference of associated electrical electromagnetic wave radiation thereof that is caused with the drive circuit board trace wiring for preventing the central processing unit high-frequency operation, traditional motherboard, one electromagnetic shielding cover is arranged usually in addition, for example metal cap 25, main electronic component is covered, produce and the electromagnetic wave of radiation is isolated mutually in order to the various frequencies that high-frequency signals that electronic component on the motherboard produced and drive circuit board trace wiring are caused.
The creator discovers, merely with metal cap 25 isolating electromagnetics, does not solve the electromagnetism wave amplitude at all and penetrates problem, because interference source is not by filtering.The electrical lead 28 that for example metal cap 25 exposes among Fig. 1 (connecting busbar wire 30, in order to electrically connect motherboard and display panel, drive circuit) is still and exposes.Therefore, high frequency noise still can radiate by electrical lead 28.Therefore, the utility model is except still using metal cap 25 isolating electromagnetics, and more each electrical lead end points of the internal electrical lead that covers at metal cap has all added a small inductance element (BEAD).Motherboard for example shown in Figure 2 top comprises with each electrical lead road 28 of the busbar wire that driving circuit is connected mutually: data line LD0 to LD7, clock pulse line LCLK, LLP respectively has a BEAD on each end points of LFRM (point, line, picture) and ON/OFF switch P K etc.Again BEAD is covered in metal cap 25 inside.In addition, in case of necessity and can be at other integrated circuit places for example: the another side that motherboard 10 exposes (side of nonmetal cover 25), communication module group or circuit of display driving or the like stick an electromagnetic wave metal shielding plate that does not more take up space (for example inside surface is coated with the Copper Foil or the aluminium foil of an insulation course) again, and with the electrical ground connection of this shielding plate, to isolate and to get rid of electromagnetic interference source as far as possible.Certainly, the aforesaid metal cap metal forming that can also this kind inside surface be coated with layer of cloth substitutes.
In addition, typical B EAD such as model MLB-160808-0100B-N3 (do not have any influence less than 1000KHz for the medium and low frequency signal, but for surpassing signal more than the 1000KHz, just have a tangible frequency response, and can filtering these surpass high-frequency signals of 1MHz.Therefore, the utility model provides the inductance element on electrical lead road can significantly bring into play filtering from the high frequency noise that motherboard produces it to be unlikely by the electrical lead radiated electromagnetic wave, or high frequency noise is passed to drive circuit die set.Certainly, also can be in order to the high frequency noise interference motherboard of filtering from drive circuit die set.Therefore, be a kind of method with regard to the source filtering noise information.
After adding a small inductance element (BEAD) via above-mentioned each electrical lead end points to busbar wire, relatively following data can be found advantage of the present utility model.Not having BEAD has only the PDA complete machine of metal cap to carry out sensitivity (Sensibility) reception degree test to find that the sensitivity value is subjected to display panel sweep velocity and the pronounceable influence of Pizeo, and it is unstable, bad during sensitivity value fashion, average about 103 to 105 decibels, and can between 107 decibels to 80 decibels, produce significantly vibration.But if adopt technology of the present utility model, will be more stable, please join [sensitivity 1] in the form information shown in Figure 3 is that each electrical lead road 28 in above-mentioned metal cap 25 respectively adds a BEAD, through the result of 20 sensitivity tests, and mean value rises to 107.6 decibels.If add on average can rise to 110.7 decibels of sensitivity value behind the Copper Foil again, [sensitivity 2] in the form information as shown in Figure 3.
The utility model with preferred embodiment explanation as above and is familiar with this field skill person, in not breaking away from spiritual scope of the present utility model, retouch when doing a little change, its scope of patent protection more ought on accompanying claim and etc. same domain decide.For example the foregoing description is that BEAD is covered with metal cap 25, also can be in metal cap 26 outsides on actual the use.
Claims (7)
1, a kind of anti-high frequency interference device that is used for personal digital aid (PDA), it is characterized in that: each electrical lead of the busbar wire of this personal digital aid (PDA) motherboard connects an inductance element respectively, in order to the blocking-up high-frequency signal, the display panels that this busbar wire electrically connects this personal digital aid (PDA) drives module and this motherboard.
2, the anti-high frequency interference device that is used for personal digital aid (PDA) according to claim 1, it is characterized in that: a mask cover this inductance element, part electrical lead, and above-mentioned motherboard comprise the part of central processing unit element, leak in order to intercept the electromagenetic wave radiation that element produced that this shield covers.
3, the anti-high frequency interference device that is used for personal digital aid (PDA) according to claim 1 is characterized in that: the surface-mounted integrated circuit of this personal digital aid (PDA) prevents further that in the metal forming of inside surface electromagnetic wave from leaking with the coating insulation film.
4, the anti-high frequency interference device that is used for personal digital aid (PDA) according to claim 3, it is characterized in that: wherein this surface-mounted integrated circuit is this motherboard, and this metal forming is that front and part electrical lead that this motherboard contains chip and these a plurality of inductance elements are covered.
5, the anti-high frequency interference device that is used for personal digital aid (PDA) according to claim 3, it is characterized in that: wherein this surface-mounted integrated circuit is to show the panel driving module for this white.
6, the anti-high frequency interference device that is used for personal digital aid (PDA) according to claim 3, it is characterized in that: wherein this metal forming is to be Copper Foil.
7, the anti-high frequency interference device that is used for personal digital aid (PDA) according to claim 1, it is characterized in that: wherein this metal forming is to be aluminium foil.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 01228851 CN2488102Y (en) | 2001-07-09 | 2001-07-09 | High-frequency interference resisting apparatus for person digital aid |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 01228851 CN2488102Y (en) | 2001-07-09 | 2001-07-09 | High-frequency interference resisting apparatus for person digital aid |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2488102Y true CN2488102Y (en) | 2002-04-24 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 01228851 Expired - Lifetime CN2488102Y (en) | 2001-07-09 | 2001-07-09 | High-frequency interference resisting apparatus for person digital aid |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2488102Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100454759C (en) * | 2003-11-05 | 2009-01-21 | 华为技术有限公司 | Wave filtering method and apparatus |
| CN104094292B (en) * | 2012-04-25 | 2017-03-08 | 株式会社村田制作所 | Wireless ic device and wireless communication terminal |
-
2001
- 2001-07-09 CN CN 01228851 patent/CN2488102Y/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100454759C (en) * | 2003-11-05 | 2009-01-21 | 华为技术有限公司 | Wave filtering method and apparatus |
| CN104094292B (en) * | 2012-04-25 | 2017-03-08 | 株式会社村田制作所 | Wireless ic device and wireless communication terminal |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CX01 | Expiry of patent term |
Expiration termination date: 20110709 Granted publication date: 20020424 |