CN202217303U - SD card (security digital memory card) and RF (radio frequency) recognition system thereof - Google Patents
SD card (security digital memory card) and RF (radio frequency) recognition system thereof Download PDFInfo
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- CN202217303U CN202217303U CN2011202172767U CN201120217276U CN202217303U CN 202217303 U CN202217303 U CN 202217303U CN 2011202172767 U CN2011202172767 U CN 2011202172767U CN 201120217276 U CN201120217276 U CN 201120217276U CN 202217303 U CN202217303 U CN 202217303U
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Abstract
The utility model provides an SD card (security digital memory card) which comprises a controller, a smart card chip, a memorizer and a metamaterial RF (radio frequency) antenna, wherein the smart card chip and the memorizer are connected with the controller; the metamaterial RF antenna is connected with the smart card chip; the metamaterial RF antenna comprises a medium substrate, a feeder and a metal sheet attached to the surface of the medium substrate, the feeder is fed into the metal sheet in a coupling manner, and a micro capillary structure is hollowed on the metal sheet so as to form a metal route; and a spacing for electronic elements to be embedded into is preinstalled on the metamaterial RF antenna. The SD card provided by the utility model adopts the metamaterial RF antenna which is easy to miniaturize so as to realize the function of mobile payment and the like without the limits of operators, thereby being beneficial to saving cost and large-scale application.
Description
Technical field
The utility model relates to wireless communication field, particularly a kind of SD card and have the radio-frequency recognition system of this SD card.
Background technology
Along with the variation with rapid changepl. never-ending changes and improvements of expanding economy and infotech, China has movable equipment, and for example the user of mobile phone, PDA, panel computer etc. surpasses 700,000,000.In movable equipment, adding payment function can reduce the inconvenience that people carry one's purse along and make people enjoy the convenient of payment whenever and wherever possible; Therefore; Mobile payment receives increasing attention, and in a foreseeable future has wide business development space.
The mobile payment device that has developed at present has the RFID-SIM card, i.e. the RF identification SIM.It realizes the function of closely identification and financial payment on mobile phone through internal short-range identification chip in SIM.Yet this type of RF identification SIM is subject to telecom operators, and only can be applied to have on the mobile device of call function.
The SD card is widely used as the memory card of all kinds of mobile devices.Use the SD card to realize that closely identification and financial payment function just can break away from the restriction of telecom operators.Yet because the rf frequency of mobile payment is lower, in the therefore present technical scheme, will cause antenna volume bigger, not meet the development trend of mobile device miniaturization according to the traditional antenna design proposal.
The utility model content
The utility model technical matters to be solved is, to the above-mentioned deficiency of prior art, proposes a kind of SD card, and this SD card is integrated with the ultra material radio-frequency antenna of miniaturization.
The utility model solves the problems of the technologies described above the technical scheme that is adopted and provides a kind of SD card; Comprise controller, intelligent card chip, storer and ultra material radio-frequency antenna; Said intelligent card chip is connected with said controller respectively with said storer; Said ultra material radio-frequency antenna is connected with said intelligent card chip, and said ultra material radio-frequency antenna comprises medium substrate, feeder line and attached to the sheet metal on medium substrate one surface, said feeder line is through the said sheet metal of coupling scheme feed-in; Hollow out has micro groove structure on sheet metal, to form metal routing on the said sheet metal, and said ultra material radio-frequency antenna is preset with the space that electronic component embeds.
In the utility model, said space is arranged between feeder line, feeder line and the sheet metal and reaches at least one of these three positions of sheet metal.
In the utility model, said space is arranged on the metal routing on the sheet metal.
In the utility model, said space is arranged on the micro groove structure, and connects the metal routing of micro groove structure both sides.
In the utility model, said micro groove structure is complementary split ring resonator structure, complementary helix structure, opening helical ring structure, two opening helical ring structure or complementary folding line structure.
In the utility model, said SD card also comprises card substrate, and said controller, intelligent card chip and storer are arranged on the side surface of card substrate.
In the utility model, said ultra material radio-frequency antenna is arranged on the side surface of card substrate.
In the utility model, said ultra material radio-frequency antenna is arranged on the inside of card substrate.
In the utility model, said micro groove structure through etching, bore quarter, photoetching, electronics is carved or ion is carved and is respectively formed on the said sheet metal.
According to the SD card of the utility model, employing be the ultra material radio-frequency antenna that is easy to miniaturization, can not need be subject to operator, realize functions such as mobile payment, and need not increase impedance matching network that the saving that helps cost is used with large-scale.In addition; The space of passing through on ultra material radio-frequency antenna, to be provided with the electronic component embedding of the utility model; And finely tune with performance antenna through the performance of the electronic component that change to embed; Design the ultra material radio-frequency antenna that satisfies adaptability and versatility requirement, can realize the SD card of different operating frequency.
The utility model also provides a kind of radio-frequency recognition system in addition, comprises reader and transponder, and said transponder is above-mentioned SD card.
Description of drawings
Fig. 1 is the ultra material radio-frequency antenna structural representation of the utility model;
Fig. 2 is the structural representation of ultra material radio-frequency antenna first embodiment of the utility model;
Fig. 3 is the structural representation of ultra material radio-frequency antenna second embodiment of the utility model;
Fig. 4 is the structural representation of ultra material radio-frequency antenna the 3rd embodiment of the utility model;
Fig. 5 is the structural representation of ultra material radio-frequency antenna the 4th embodiment of the utility model;
Fig. 6 is the structural representation of ultra material radio-frequency antenna the 5th embodiment of the utility model;
Fig. 7 a is the synoptic diagram of complementary split ring resonator structure;
Fig. 7 b is depicted as the synoptic diagram of complementary helix structure;
Fig. 7 c is depicted as the synoptic diagram of opening helical ring structure;
Fig. 7 d is depicted as the synoptic diagram of two opening helical ring structures;
Fig. 7 e is depicted as the synoptic diagram of complementary folding line structure;
Fig. 8 a is the synoptic diagram of deriving of complementary its geometric configuration of split ring resonator structure shown in Fig. 7 a;
Fig. 8 b is the synoptic diagram of deriving of complementary its expansion of split ring resonator structure shown in Fig. 7 a;
Fig. 9 a is the structural representation behind the complementary split ring resonator structure shown in three Fig. 7 a compound;
Fig. 9 b is the compound synoptic diagram that the complementary split ring resonator structure shown in two Fig. 7 a and Fig. 7 b are depicted as complementary helix structure;
Figure 10 is the structural representation after the complementary split ring resonator structural group battle array shown in four Fig. 7 a.
Shown in Figure 11 is the structural representation of the utility model SD card.
Embodiment
Below in conjunction with accompanying drawing and embodiment, the utility model technical scheme is further described.
Shown in Figure 11 is the structural representation of the utility model SD card.Among Figure 11, the SD card comprises card substrate 100 and is arranged at controller 101, intelligent card chip 102, storer 103 and the ultra material radio-frequency antenna 104 on card substrate 100 1 side surfaces.Wherein, intelligent card chip 102 is connected with controller 101 respectively with storer 103, and intelligent card chip 102 is connected with ultra material radio-frequency antenna 104 through a corresponding day wire pin simultaneously.Controller 101 is used to discern the operation of external unit to the SD card; Intelligent card chip 102 can receive the signal that said ultra material radio-frequency antenna 104 transmission come; And self the form of application data information through electric signal be sent to said ultra material radio-frequency antenna; Said intelligent card chip storage inside has application data, realizes various non-contact application.For example mobile phone wallet, mobile phone mass transit card etc.
In the present embodiment; Controller, intelligent card chip and storer all can use conventional prior art; Its inner structure and working method are conventionally known to one of skill in the art; The closing form of SD card is also identical with prior art simultaneously, and is not the main utility model technical essential of the utility model, does not therefore do detailed description at this.Simultaneously, disturb in order to make ultra material radio-frequency antenna 104 do not clamped the inner circuit module of mobile device that carries by SD, ultra material radio-frequency antenna 104 can be arranged at the outer ledge of SD card.Can certainly be arranged on the inside of card substrate 100 with surpassing material radio-frequency antenna 104, further make the miniaturization of SD card, save SD and be stuck in space shared in the mobile device.
The radio frequency standard that is applied to the mobile payment field is generally the low frequency frequency, and for example 13.56MHZ or 2.4GHZ can work in this low frequency in order to make the SD card, and the effect of antenna is particularly important.Yet according to the traditional antenna design proposal, the length of antenna is directly proportional with wavelength, and frequency is low more, thereby the longer antenna volume that causes of wavelength is big more.According to the traditional antenna design proposal, frequency of operation is an example with 13.56MHZ or 2.4GHZ still, and the thickness of antenna and length are all bigger, are difficult to be implemented in the application on the SD card.And in order to guarantee the high-performance of antenna, traditional radio-frequency antenna generally also need increase impedance matching network.
Ultra material is to be arranged on the base material and to be constituted by the artificial microstructure with certain pattern form, has different electromagnetic responses thereby the different pattern form of artificial microstructure makes ultra material have different specific inductive capacity with dimensional structure with the feasible ultra material of different magnetic permeabilities.Wherein, When this artificial microstructure is in resonance band; This artificial microstructure will show the dispersion characteristics of height, and the dispersion characteristics of so-called height are meant the impedance of this artificial microstructure, hold perception, equivalent specific inductive capacity and magnetic permeability be along with violent variation can take place frequency.
The above-mentioned principle of the ultra material of the utility model utilization; Design a kind of ultra material radio-frequency antenna; Micro groove structure is formed on the radiation sheet metal, saves the miniaturization of the design of impedance matching network with the realization antenna thereby the coupling of this radiation sheet metal and feeder line makes antenna have abundant radiation characteristic.Above-mentioned micro groove structure is a kind of form of artificial microstructure.The SD card of the utility model can be applied in mobile phone, PDA, MP3, MP4, computer and the digital camera, and the form of its SD card is with existing consistent.
The core of the utility model is ultra material radio-frequency antenna, below describes the ultra material radio-frequency antenna of the utility model in detail.
As shown in Figure 1; The said ultra material radio-frequency antenna 104 of the utility model comprises medium substrate 1, feeder line 2, attached to the sheet metal 4 on medium substrate 1 one surfaces; Said feeder line 2 is through the said sheet metal 4 of coupling scheme feed-in; Be formed with micro groove structure 41 on the said sheet metal 4 on sheet metal, to form metal routing 42, said ultra material radio-frequency antenna 104 is preset with the space 6 that electronic component embeds.Among Fig. 1 to Fig. 6, the part of the cross-hatching on the sheet metal 4 is a metal routing 42, the blank parts on the sheet metal 4 (part of hollow out) expression micro groove structure 41.In addition, feeder line 2 is also represented with profile line.
Said micro groove structure 41 in the utility model can be the complementary helix structure shown in the complementary split ring resonator structure shown in Fig. 7 a, Fig. 7 b, a kind of in the two opening helical ring structures shown in the opening helical ring structure shown in Fig. 7 c, Fig. 7 d, the complementary folding line structure shown in Fig. 7 e or through several kinds of structures in front derive, compound or a micro groove structure that the group battle array obtains.Derive and be divided into two kinds; A kind of is that geometric configuration is derived; Another kind is that expansion is derived, and the geometric configuration is here derived and is meant that function class derives like, variform structure, is for example derived to class of a curve structure, triangle class formation and other different polygon class formation by the square frame class formation; The expansion is here derived and promptly on the basis of Fig. 7 a to Fig. 7 e, is offered new groove to form new micro groove structure; Complementary split ring resonator structure with shown in Fig. 7 a is an example, and Fig. 8 a is its geometric configuration synoptic diagram of deriving, and Fig. 8 b is its geometric configuration synoptic diagram of deriving.Compound being meant here, a plurality of stacks of the micro groove structure of Fig. 7 a to Fig. 7 e form a new micro groove structure, shown in Fig. 9 a, are the structural representation of the complementary split ring resonator structure shown in three Fig. 7 a after compound; Shown in Fig. 9 b, be that the complementary split ring resonator structure shown in two Fig. 7 a and Fig. 7 b are depicted as the common structural representation after compound of complementary helix structure.The group battle array here is meant the micro groove structure that is formed an integral body by the micro groove structure array on same sheet metal shown in a plurality of Fig. 7 a to Fig. 7 e, and is shown in figure 10, is the structural representation after a plurality of complementary split ring resonator structural group battle arrays shown in Fig. 7 a.Below be that example is set forth the utility model all with the opening helical ring structure shown in Fig. 7 c.
Divide five embodiment to come to introduce in detail the utility model below.
First embodiment
As shown in Figure 2, in the present embodiment, on feeder line 2, be preset with the space 51 that embeds perceptual electronic component and/or resistance, the position in preset embedding electronic component space can be the optional position on the feeder line 2, and can have a plurality of.Can in space 51, embed perceptual electronic component, to change the inductance value on the feeder line 2.Using formula:
can know square being inversely proportional to of size and frequency of operation of inductance value; So when the frequency of operation that needs is when hanging down frequency of operation, to realize through suitable embedding inductance or perceptual electronic component.In the present embodiment, the inductance value range of the perceptual electronic component of adding is between 0-5uH, thereby if too big alternating signal will be had influence on the radiation efficiency of antenna by inductive element consumption.The said antenna of present embodiment has the good radiation characteristic of a plurality of frequency ranges; Five main radiation frequencies are distributed to 5.5GHz from 900MHz always; Almost contained each main communication frequencys such as GSM, CDMA, bluetooth, W-Lan (IEEE802.11 agreement), GPS, TD-LTE, had very high integrated level and can reach the purpose that changes operating frequency of antenna through the inductance value on the feeder line is regulated.Certainly, also can be in space 51 embedded resistor, to improve the radiation resistance of antenna.Certainly, the space on the feeder line also can be a plurality of, wherein distinguishes embedded resistor and perceptual electronic component, has both realized the adjusting of frequency of operation, can improve the radiation resistance of antenna again.The space available wire short circuit that does not add electronic component.
Embodiment two
As shown in Figure 3, in the present embodiment, between feeder line 2 and sheet metal 4, be preset with the space 53 that embeds the capacitive electronic component, the position in preset embedding electronic component space can be the optional position between feeder line 2 and the sheet metal 4.Space 53 is the space that embeds the capacitive electronic component in the present embodiment among Fig. 3; Itself has certain electric capacity between feeder line 2 and the sheet metal 4; Here regulate the signal coupling between feeder line and the sheet metal 4 through embedding the capacitive electronic component; Using formula:
can know square being inversely proportional to of size and frequency of operation of capacitance; So when the frequency of operation that needs is when hanging down frequency of operation, to realize through suitable embedding electric capacity or perceptual electronic component.In the present embodiment, the capacitance scope of the capacitive electronic component of adding is usually between 0-2pF, but the capacitance that embeds along with the variation of operating frequency of antenna also possibly exceed the scope of 0-2pF.Certainly, also can between feeder line 2 and sheet metal 4, preset a plurality of spaces.Equally, in not being connected with the space of electronic component, adopt the lead short circuit.
Embodiment three
As shown in Figure 4; In the present embodiment; On the metal routing 42 of sheet metal, be reserved with the space that embeds perceptual electronic component and/or resistance, the space that embeds electronic component not only is confined to the space 55 and space 56 that provide among the figure, as long as other positions satisfy condition all can.The purpose that embeds perceptual electronic component here is the inductance value that increases sheet metal internal resonance structure, thus the effect that the resonance frequency and the bandwidth of operation of antenna played adjusting; Identical with embodiment one, the purpose of embedded resistor is to improve the radiation resistance of antenna here.So, then decide as required to embedding perceptual electronic component or resistance.In not embedding the space of electronic component, adopt the lead short circuit in addition.
Embodiment four
As shown in Figure 5, in the present embodiment, on micro groove structure 41, be reserved with the space 57 that embeds the capacitive electronic component, and said space 57 connects the metal routing 42 of micro groove structure 41 both sides.The space that embeds electronic component not only limit to Fig. 5 in the space 57 that provides, as long as other positions satisfy condition all can.Embedding capacitive electronic component can change the resonance performance of sheet metal, the Q value and the resonance working point of finally improving antenna.As common practise, we know that the relation of passband BW and resonance frequency w0 and quality factor q is: BW=wo/Q, and this formula shows that Q more greatly then passband is narrow more, the more little then passband of Q is wide more.Other has: Q=wL/R=1/wRC, and wherein, Q is a quality factor; Supply frequency when w is circuit resonance; L is an inductance; R is the resistance of string; C is an electric capacity, can be known by the Q=wL/R=1/wRC formula, and Q and C are inverse ratio, therefore, can reduce the Q value through adding the capacitive electronic component, and passband is broadened.
Embodiment five
As shown in Figure 6, in the present embodiment, the space that electronic component embeds is set all between feeder line 2, feeder line 2 and the sheet metal 4 and sheet metal 4 these three positions.Wherein, the space on the sheet metal 4 comprises the space that is arranged on the space on the metal routing 42 and is arranged on the micro groove structure 41 and connects the metal routing 42 of both sides.Particularly, the space in the present embodiment comprises the space 61 on the feeder line 2, the space 63 between feeder line 2 and the sheet metal 4; Space 65,66 on the metal routing 42, the space 67 on the micro groove structure 41, certainly; The position that provides in the present embodiment is not a uniqueness, in the present embodiment, in above-mentioned space, adds electronic component to regulate the performance of antenna; The principle of its principle and embodiment one to four is similar, and present embodiment is no longer described.
The reserved location in space is not limited to above-mentioned five kinds of forms on the ultra material radio-frequency antenna 104 of the utility model, as long as the space is arranged on the antenna.For example, the space can also be arranged on the medium substrate.
The said electronic component of the utility model is perceptual electronic component, capacitive electronic component or resistance.After in the headspace of antenna, adding this type of electronic component, can improve the various performances of antenna.And, can realize the adjustable of antenna performance parameters through adding the electronic component of different parameters.Therefore; The antenna of the utility model can be the same structure before not adding any element; Just through adding different electronic components, and the parameter of electronic component (inductance value, resistance value, capacitance), realize the performance parameter of different antennae at diverse location.Promptly realized versatility.Can significantly reduce production costs.
The said space of the utility model can be a pad, also can be a vacancy.Pad configuration can be referring to the pad on the common circuit board.Certainly, the needs that the design consideration of its size is different can be different.
In addition, in the utility model, medium substrate 1 can be processed by stupalith, macromolecular material, ferroelectric material, ferrite material or ferromagnetic material.Preferably, being processed by macromolecular material, can be macromolecular materials such as FR-4, F4B particularly.
In the utility model, sheet metal 4 is copper sheet or silver strip.Be preferably copper sheet, cheap, conduct electricity very well.
In the utility model, feeder line 2 is selected for use with sheet metal 4 same materials and is processed.Be preferably copper.
In the utility model, the processing and manufacturing of ultra material radio-frequency antenna as long as satisfy the design concept of the utility model, can be adopted various manufactures.Prevailing method is to use the manufacturing approach of all kinds of printed circuit board (PCB)s (PCB), and certainly, the PCB of double-sided copper-clad makes the processing request that also can satisfy the utility model.Remove this processing mode; Can also introduce other manufacturing process according to the needs of reality; (RFID is the abbreviation of Radio Frequency Identification such as RFID; Be REID, be commonly called as electronic tag) but in the processing mode that makes up of processing mode and iron plate and the PCB of flexible PCB processing, iron plate antenna of employed conductive silver paste printing ink processing mode, all kinds of deformation devices.Wherein, iron plate and PCB combination processing mode is meant that the accurate processing that utilizes PCB accomplishes the processing of ultra material radio-frequency antenna micro groove structure, accomplishes other slave part with iron plate.In addition, can also process through etching, plating, brill quarter, photoetching, electronics is carved or ion is carved method.Wherein etching is more excellent manufacturing process, and its step is after designing the topological pattern of suitable micro groove structure, through etching machines, utilizes the chemical reaction of solvent and metal to get rid of the metal section and part of presetting the micro groove structure pattern on the radiation sheet metal.
The utility model also provides a kind of radio-frequency recognition system in addition, comprises reader and transponder, and said transponder is above-mentioned SD card.Said reader is conventional reader.Reader is launched the radio wave energy of a CF to the SD card, sees off in order to the application data that driving SD card will be stored on the intelligent card chip, and this moment, reader just received unscrambling data in regular turn, gave application program and did corresponding processing.
Combine accompanying drawing that the embodiment of the utility model is described above; But the utility model is not limited to above-mentioned embodiment, and above-mentioned embodiment only is schematically, rather than restrictive; Those of ordinary skill in the art is under the enlightenment of the utility model; Not breaking away under the scope situation that the utility model aim and claim protect, also can make a lot of forms, these all belong within the protection of the utility model.
Claims (10)
1. SD card; Comprise controller, intelligent card chip, storer and ultra material radio-frequency antenna; Said intelligent card chip is connected with said controller respectively with said storer, and said ultra material radio-frequency antenna is connected with said intelligent card chip, it is characterized in that; Said ultra material radio-frequency antenna comprises medium substrate, feeder line and attached to the sheet metal on medium substrate one surface; Said feeder line is through the said sheet metal of coupling scheme feed-in, and hollow out has micro groove structure on sheet metal, to form metal routing on the said sheet metal, and said ultra material radio-frequency antenna is preset with the space that electronic component embeds.
2. SD card as claimed in claim 1 is characterized in that, said space is arranged between feeder line, feeder line and the sheet metal and reaches at least one of these three positions of sheet metal.
3. SD card according to claim 2 is characterized in that said space is arranged on the metal routing on the sheet metal.
4. SD card according to claim 2 is characterized in that said space is arranged on the micro groove structure, and connects the metal routing of micro groove structure both sides.
5. SD card as claimed in claim 1 is characterized in that, said micro groove structure is complementary split ring resonator structure, complementary helix structure, opening helical ring structure, two opening helical ring structure or complementary folding line structure.
6. SD card as claimed in claim 1 is characterized in that, said SD card also comprises card substrate, and said controller, intelligent card chip and storer are arranged on the side surface of card substrate.
7. SD card as claimed in claim 6 is characterized in that, said ultra material radio-frequency antenna is arranged on the side surface of card substrate.
8. SD card as claimed in claim 6 is characterized in that, said ultra material radio-frequency antenna is arranged on the inside of card substrate.
9. SD card as claimed in claim 1 is characterized in that, said micro groove structure through etching, bore quarter, photoetching, electronics is carved or ion is carved and is respectively formed on the said sheet metal.
10. a radio-frequency recognition system comprises reader and transponder, it is characterized in that, said transponder is any described SD card of claim 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011202172767U CN202217303U (en) | 2011-06-24 | 2011-06-24 | SD card (security digital memory card) and RF (radio frequency) recognition system thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011202172767U CN202217303U (en) | 2011-06-24 | 2011-06-24 | SD card (security digital memory card) and RF (radio frequency) recognition system thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202217303U true CN202217303U (en) | 2012-05-09 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011202172767U Expired - Lifetime CN202217303U (en) | 2011-06-24 | 2011-06-24 | SD card (security digital memory card) and RF (radio frequency) recognition system thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202217303U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102810175A (en) * | 2011-06-24 | 2012-12-05 | 深圳光启高等理工研究院 | SD (secure digital) card and radio frequency identification system thereof |
-
2011
- 2011-06-24 CN CN2011202172767U patent/CN202217303U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102810175A (en) * | 2011-06-24 | 2012-12-05 | 深圳光启高等理工研究院 | SD (secure digital) card and radio frequency identification system thereof |
| CN102810175B (en) * | 2011-06-24 | 2015-11-04 | 深圳光启高等理工研究院 | A kind of SD card and radio-frequency recognition system thereof |
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Legal Events
| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CP02 | Change in the address of a patent holder | ||
| CP02 | Change in the address of a patent holder |
Address after: 518057 2, building 9, hi tech middle 1, Nanshan District high tech Zone, Shenzhen, Guangdong. Co-patentee after: Shenzhen Kuang-Chi Innovation Technology Co., Ltd. Patentee after: Shenzhen Kuang-Chi Institute of Advanced Technology Address before: 518000 software building 9, hi tech middle 1, central high tech Zone, Shenzhen, Guangdong, China. Co-patentee before: Shenzhen Kuang-Chi Innovation Technology Co., Ltd. Patentee before: Shenzhen Kuang-Chi Institute of Advanced Technology |
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| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20120509 |