CN105811957B - A kind of capacitance touch induced key and charactron driving multiplex circuit and method - Google Patents
A kind of capacitance touch induced key and charactron driving multiplex circuit and method Download PDFInfo
- Publication number
- CN105811957B CN105811957B CN201610252875.XA CN201610252875A CN105811957B CN 105811957 B CN105811957 B CN 105811957B CN 201610252875 A CN201610252875 A CN 201610252875A CN 105811957 B CN105811957 B CN 105811957B
- Authority
- CN
- China
- Prior art keywords
- charactron
- module
- square wave
- capacitance touch
- gate
- 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.)
- Active
Links
Classifications
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03K—PULSE TECHNIQUE
- H03K17/00—Electronic switching or gating, i.e. not by contact-making and –breaking
- H03K17/94—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the way in which the control signals are generated
- H03K17/96—Touch switches
- H03K17/962—Capacitive touch switches
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
- G09G3/22—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources
- G09G3/30—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels
- G09G3/32—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED]
Abstract
The present invention relates to a kind of capacitance touch induced key and charactron driving multiplex circuit and method, which includes: square wave generation module, RC filter module, touch sensible and charactron driving Multiplexing module, the first data selecting module, the second data selector and signal shaping module；This method comprises: different with the capacitance of pad is touched according to the natural capacity of charactron, using high frequency square wave to touch capacitor charge and discharge, the signal for controlling charactron is low frequency either direct current, signal isolation is carried out by way of the RC filter in Multiplexing Unit, so that the low-frequency square-wave for the high frequency square wave of touch sensible and for charactron control is mutually isolated.Capacitance touch induced key proposed by the invention and charactron driving multiplex circuit and method, greatly simplifie circuit, improve the convenience of application, realize the multiplexing of the reliable induction and charactron driving of touch key-press.
Description
Technical field
The present invention relates to a kind of capacitance touch induced key and charactron driving multiplex circuit and methods.
Background technique
Currently, eight sections of LED(light emitting diodes) charactron (with hereinafter referred to as: charactron) be widely used in machine top
The fields such as the small household appliances such as box, electromagnetic oven and industry, medical treatment.The display driving of such charactron mostly uses greatly charactron
Section, position direct driving technologies.Meanwhile capacitance touch induced key uses non-direct contact technology, relative to traditional straight
For contacting key, long service life, user experience is good, and reliability will not reduce as time increases.It is wide at present
It is general to be applied to the fields such as household electrical appliance and each industry, medical treatment.
In the field applied simultaneously using capacitance touch induced key and charactron, product on the market is all used at present
Following several schemes are realized: (1) touching part and display driving part and realized using different chips.(2) part and display are touched
Drive part is realized using same chip, but touch key-press pin and charactron driving pin use different pins.(3) it touches
It touches part and display driving part to realize using same chip, touch pin and charactron pin use same pin, but nothing
Method uses drive digital tube function and touch function simultaneously, is that the pin can not external number when being used as touch key-press in circuit
Code pipe, otherwise influences touch function.When being controlled as charactron, it can not contact and touch pad, otherwise touch function is not available
And it also requires the function of the pin is arranged by software, i.e., touch pad and charactron cannot be connected simultaneously to a pin
On, above scheme is at high cost, controls cumbersome.
Summary of the invention
The purpose of the present invention is to provide a kind of capacitance touch induced keys and charactron to drive multiplex circuit and method,
To overcome defect existing in the prior art.
To achieve the above object, the technical scheme is that a kind of capacitance touch induced key and charactron driving
Multiplex circuit includes: that square wave generation module, RC filter module, touch sensible and charactron driving Multiplexing module, the first data are selected
Select module, the second data selector and signal shaping module；The output end of the square wave generation module and the RC filter mould
The first end of block is connected；The second end of the RC filter module is connected to through first data selector and described touches induction and number
Code pipe drives Multiplexing module；The third end of the RC filter module is connected to the signal shaping through second data selector
Module；The signal shaping module is also connected with the square wave generation module.
In an embodiment of the present invention, the square wave generation module includes a high frequency square wave generator.
In an embodiment of the present invention, first data selecting module is also connected with a low-frequency control signal generator.
In an embodiment of the present invention, the RC filter module includes sequentially connected first NOT gate, first resistor, second
Resistance and the second NOT gate；First end of the one end of first NOT gate as the RC filter module, the first resistor with
Second end of the connecting pin of the second resistance as the RC filter module, one end of second NOT gate are filtered as the RC
The third end of wave module.
In an embodiment of the present invention, the touch sensible and charactron driving Multiplexing module include a capacitance touch sense
Answer pad and a charactron；One 3rd resistor of one end of the charactron is connected with the capacitance touch induction bonding pad,
And it is connected with first data selector；The other end of the charactron is grounded.
In an embodiment of the present invention, the signal shaping module include the XOR gate being sequentially connected, third NOT gate and
4th NOT gate；One end of the XOR gate is connected with second data selector；The output end of the square wave generating unit passes through
5th NOT gate and the 6th NOT gate are connected to the other end of the XOR gate.
Further, the multiplexing method of a kind of capacitance touch induced key and charactron driving multiplex circuit is also provided,
Include the following steps:
Step S1: according to the capacitor of capacitance touch induction bonding pad in the touch sensible and charactron driving Multiplexing module
The square wave frequency of the square wave generation module is arranged in value, and the square wave generation module is by the RC filter module to the capacitor
Formula touch sensible pad carries out charge and discharge；
Step S2: Multiplexing module is driven according to touch sensible described in the set of frequency of the square wave generation module and charactron
The resistance value of the 3rd resistor of middle charactron connection so that charactron square wave that the square wave generation module is generated it is equivalent and
Open circuit, and square wave is only in response to the capacitance touch induction bonding pad；
Step S3: the frequency of the charactron driving signal is set according to the equivalent capacitance value of the charactron, and is passed through
The charactron driving signal is connected in first data selecting module, and the charactron is driven to light or extinguish.
In an embodiment of the present invention, the square wave generation module generates high frequency square wave.
In an embodiment of the present invention, the charactron driving signal is direct current or low-frequency square-wave.
Compared to the prior art, the invention has the following advantages: a kind of capacitance touch sense proposed by the invention
Key and charactron is answered to drive multiplex circuit and method, for the application neck for needing while using charactron and capacitance touch button
Domain, for actual demand, connected applications environment introduces capacitance touch button and charactron multiplex circuit, solves existing capacitive touch
The device pin touched under key and charactron while use condition is more, controls cumbersome, at high cost disadvantage, simplifies circuit, improves
The convenience of application realizes the multiplexing of the reliable induction and charactron driving of touch key-press.
Detailed description of the invention
Fig. 1 is a kind of circuit diagram of capacitance touch induced key and charactron driving multiplex circuit in the present invention.
Fig. 2 is the induction of two-way capacitance touch and charactron driving multiplex circuit connection signal in the present embodiment of the invention
Figure.
Specific embodiment
With reference to the accompanying drawing, technical solution of the present invention is specifically described.
The present invention provides a kind of capacitance touch induced key and charactron driving multiplex circuit, as shown in Figure 1, comprising:
Square wave generation module, RC filter module 1, touch sensible and charactron drive Multiplexing module 2, for the first data of access selection
Selecting module, for access selection the second data selector and signal shaping module 3；The output end of square wave generation module with
The first end of RC filter module is connected；The second end of RC filter module is connected to through the first data selector and touches induction and charactron
Drive Multiplexing module；The second data selector of third end of RC filter module is connected to signal shaping module；Signal shaping mould
Block is also connected with square wave generation module.
In the present embodiment, square wave generation module includes a high frequency square wave generator.
In the present embodiment, the first data selecting module is also connected with a low-frequency control signal generator.As shown in Fig. 2,
Data selector selA is connected with low-frequency control signal generator respectively with selB.
In the present embodiment, the first data selector uses alternative data selector, and according to required touch key-press number
Difference, select different data selector, 4 membrane keyboards select four to select a data selector, and a number is selected in 8 membrane keyboards selections eight
According to selector.Data selector selA, selB, selC are respectively connected to the different control terminals of same controller, and respectively correspond
Generate control signal ctrA, ctrB and ctrC.
In the present embodiment, as shown in Fig. 2, RC filter module 1 includes sequentially connected first NOT gate, first resistor, the
Two resistance and the second NOT gate；First end of the one end of first NOT gate as RC filter module, first resistor and second resistance
Second end of the connecting pin as RC filter module, third end of the one end of the second NOT gate as RC filter module.As shown in Fig. 2,
The first end of RC filter module in first via multiplex circuit and the RC filter module in the second road multiplex circuit respectively with height
Frequency square-wave generator is connected, and second end is connected with Multiplexing module respectively, and third end is namely several respectively with the second data selecting module
It is connected according to selector selC.
In the present embodiment, touch sensible and charactron driving Multiplexing module include a capacitance touch induction bonding pad and
One charactron 4；One 3rd resistor of one end of charactron is connected with capacitance touch induction bonding pad, and with the first data selector
It is connected；The other end of charactron is grounded.As shown in Fig. 2, data selector selA and selB are respectively corresponded and capacitance touch sense
Pad and charactron is answered to be connected.
In the present embodiment, signal shaping module includes the XOR gate being sequentially connected, third NOT gate and the 4th NOT gate；It is different
Or one end of door is connected with the second data selector, namely is connected with data selector selC；The output end of square wave generating unit
The other end of XOR gate is connected to through the 5th NOT gate and the 6th NOT gate.Preferably, the 4th NOT gate is final output, one is obtained
The square wave that phase (duty ratio) changes with capacitance variations, output are handled to external controller.
Further, the multiplexing method of a kind of capacitance touch induced key and charactron driving multiplex circuit is also provided,
Include the following steps:
Step S1: it is set according to touch sensible and the capacitance of capacitance touch induction bonding pad in charactron driving Multiplexing module
The square wave frequency of square wave generation module is set, in the present embodiment, square wave generation module generates high frequency square wave, and square wave generation module is logical
It crosses RC filter module and charge and discharge is carried out to capacitance touch induction bonding pad；
Step S2: according to charactron in the set of frequency touch sensible of square wave generation module and charactron driving Multiplexing module
The resistance value of the 3rd resistor of connection so that charactron square wave that square wave generation module is generated it is equivalent with it is breaking, and square wave is only rung
Answer capacitance touch induction bonding pad；
Step S3: the frequency of charactron driving signal being arranged according to the equivalent capacitance value of charactron, in the present embodiment, number
Code pipe driving signal is direct current or low-frequency square-wave, and charactron driving signal, driving number is connected by the first data selecting module
Code pipe is lighted or is extinguished.
In the present embodiment, according to the difference of actual application environment, the high frequency square wave of different frequency is selected.First against mesh
Preceding household electrical appliances, security protection, application field is ok in 10Mhz-20Mhz as previously described for medical treatment etc..Secondly, being directed to different pads
Size, the factors such as medium, is finely adjusted the frequency of square wave, can obtain better stability and reliability.Square wave passes through in Fig. 2
RC filter unit 1, pad is touched to outer contacting and carries out charge and discharge, which is equivalent to a capacitor.It is multiplexed at this time
Resistance R and charactron in unit 2 form a RC filter circuit, and charactron also has the equivalent capacity of itself, passes through tool
Body calculates the resistance value of R, so that the partial circuit is equivalent to open circuit to the square wave of input；So square wave is only by external touch pad
Influence.When needing to light charactron, selects corresponding signal to pass through by data selector, in this embodiment, light
The signal of charactron is the square wave of direct current either low frequency, and touch pad connected in parallel does not interfere with the driving of charactron,
It such as lights or extinguishes.It is different with the capacitance of pad is touched according to the natural capacity of charactron, using high frequency square wave to touch
Capacitor charge and discharge passes through RC filter circuit in turn and generates band logical effect, and the signal for controlling charactron is low frequency either direct current, leads to
The RC(C crossed in Multiplexing Unit 2 is the equivalent capacity of charactron) mode of filter carries out signal isolation, so that for touching sense
The high frequency square wave answered and the low-frequency square-wave for charactron control are mutually isolated, realize the multiplexing of the two.
In the present embodiment, chip design is carried out using integrated circuit technology, above-mentioned whole device can be all integrated into
It is realized in chip, periphery is not necessarily to other support circuits, touch pad, current-limiting resistance and charactron is left behind outside piece, in Fig. 2
Shown in Multiplexing Unit 2.
The above are preferred embodiments of the present invention, all any changes made according to the technical solution of the present invention, and generated function is made
When with range without departing from technical solution of the present invention, all belong to the scope of protection of the present invention.
Claims (8)
1. a kind of capacitance touch induced key and charactron drive multiplex circuit characterized by comprising mould occurs for square wave
Block, RC filter module, touch sensible and charactron driving Multiplexing module, the first data selector, the second data selector and
Signal shaping module；The output end of the square wave generation module is connected with the first end of the RC filter module；The RC filtering
The second end of module is connected to the touch sensible through first data selector and charactron drives Multiplexing module；The RC
The third end of filter module is connected to the signal shaping module through second data selector；The signal shaping module is also
It is connected with the square wave generation module；
The RC filter module includes sequentially connected first NOT gate, first resistor, second resistance and the second NOT gate；Described
First end of the one end of one NOT gate as the RC filter module, the connecting pin conduct of the first resistor and the second resistance
The second end of the RC filter module, third end of the one end of second NOT gate as the RC filter module.
2. a kind of capacitance touch induced key according to claim 1 and charactron drive multiplex circuit, feature exists
In the square wave generation module includes a high frequency square wave generator.
3. a kind of capacitance touch induced key according to claim 1 and charactron drive multiplex circuit, feature exists
In first data selector is also connected with a low-frequency control signal generator.
4. a kind of capacitance touch induced key according to claim 1 and charactron drive multiplex circuit, feature exists
In the touch sensible and charactron driving Multiplexing module include a capacitance touch induction bonding pad and a charactron；It is described
One 3rd resistor of one end of charactron is connected with the capacitance touch induction bonding pad, and with the first data selector phase
Even；The other end of the charactron is grounded.
5. a kind of capacitance touch induced key according to claim 1 and charactron drive multiplex circuit, feature exists
In the signal shaping module includes the XOR gate being sequentially connected, third NOT gate and the 4th NOT gate；One end of the XOR gate
It is connected with second data selector；The output end of the square wave generation module is connected to through the 5th NOT gate and the 6th NOT gate
The other end of the XOR gate.
6. one kind is based on a kind of described in any item capacitance touch induced keys of claim 1 ~ 5 and charactron driving multiplexing electricity
The multiplexing method on road, which comprises the steps of:
Step S1: it is set according to the touch sensible and the capacitance of capacitance touch induction bonding pad in charactron driving Multiplexing module
The square wave frequency of the square wave generation module is set, the square wave generation module is by the RC filter module to the capacitive touch
It touches induction bonding pad and carries out charge and discharge；
Step S2: according to number in touch sensible described in the set of frequency of the square wave generation module and charactron driving Multiplexing module
Code pipe connection 3rd resistor resistance value so that the square wave that the charactron generates the square wave generation module be equivalent to it is disconnected
Road, and square wave is only in response to the capacitance touch induction bonding pad；
Step S3: the frequency of the charactron driving signal is set according to the equivalent capacitance value of the charactron, and by described
Charactron driving signal is connected in first data selector, and the charactron is driven to light or extinguish.
7. the multiplexing side of a kind of capacitance touch induced key according to claim 6 and charactron driving multiplex circuit
Method, which is characterized in that the square wave generation module generates high frequency square wave.
8. the multiplexing side of a kind of capacitance touch induced key according to claim 6 and charactron driving multiplex circuit
Method, which is characterized in that the charactron driving signal is direct current or low-frequency square-wave.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610252875.XA CN105811957B (en) | 2016-04-22 | 2016-04-22 | A kind of capacitance touch induced key and charactron driving multiplex circuit and method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610252875.XA CN105811957B (en) | 2016-04-22 | 2016-04-22 | A kind of capacitance touch induced key and charactron driving multiplex circuit and method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105811957A CN105811957A (en) | 2016-07-27 |
| CN105811957B true CN105811957B (en) | 2019-03-19 |
Family
ID=56458409
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610252875.XA Active CN105811957B (en) | 2016-04-22 | 2016-04-22 | A kind of capacitance touch induced key and charactron driving multiplex circuit and method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105811957B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108228010A (en) * | 2016-12-13 | 2018-06-29 | 佛山市顺德区美的电热电器制造有限公司 | Capacitance touch induced key detection circuit and method and household electrical appliance |
| CN109347483B (en) * | 2018-11-30 | 2024-03-22 | 珠海巨晟科技股份有限公司 | Control circuit for IO shared by touch key and nixie tube |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6458121A (en) * | 1987-08-28 | 1989-03-06 | Aruyume Kk | Touch switch |
| CN201518478U (en) * | 2009-09-25 | 2010-06-30 | 赣州市英唐电子科技有限公司 | Capacitive touch induction circuit |
| CN201584957U (en) * | 2009-12-29 | 2010-09-15 | 深圳创维－Rgb电子有限公司 | Touch key circuit, touch control device, touch screen and electronic equipment |
| CN202889317U (en) * | 2012-05-03 | 2013-04-17 | 东莞市精诚电能设备有限公司 | Capacitance type touch key circuit |
| CN104252844A (en) * | 2014-09-23 | 2014-12-31 | 京东方科技集团股份有限公司 | Pixel circuit, driving method of pixel circuit, organic light emitting display panel and display device |
| CN104808852A (en) * | 2015-04-30 | 2015-07-29 | 福州福大海矽微电子有限公司 | Touch identification and digital display integrated circuit as well as peripheral circuit and accessing method thereof |
| CN205566259U (en) * | 2016-04-22 | 2016-09-07 | 福州福大海矽微电子有限公司 | Capacitanc touch -sensitive button and digital tube drive multiplex circuit |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101669058B1 (en) * | 2014-08-19 | 2016-10-26 | 엘지디스플레이 주식회사 | Data driver and display device using the same |
-
2016
- 2016-04-22 CN CN201610252875.XA patent/CN105811957B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6458121A (en) * | 1987-08-28 | 1989-03-06 | Aruyume Kk | Touch switch |
| CN201518478U (en) * | 2009-09-25 | 2010-06-30 | 赣州市英唐电子科技有限公司 | Capacitive touch induction circuit |
| CN201584957U (en) * | 2009-12-29 | 2010-09-15 | 深圳创维－Rgb电子有限公司 | Touch key circuit, touch control device, touch screen and electronic equipment |
| CN202889317U (en) * | 2012-05-03 | 2013-04-17 | 东莞市精诚电能设备有限公司 | Capacitance type touch key circuit |
| CN104252844A (en) * | 2014-09-23 | 2014-12-31 | 京东方科技集团股份有限公司 | Pixel circuit, driving method of pixel circuit, organic light emitting display panel and display device |
| CN104808852A (en) * | 2015-04-30 | 2015-07-29 | 福州福大海矽微电子有限公司 | Touch identification and digital display integrated circuit as well as peripheral circuit and accessing method thereof |
| CN205566259U (en) * | 2016-04-22 | 2016-09-07 | 福州福大海矽微电子有限公司 | Capacitanc touch -sensitive button and digital tube drive multiplex circuit |
Non-Patent Citations (1)
| Title |
|---|
| "一种触控按键检测和LED驱动的复用IO的设计方法";黄淑燕;《中国集成电路》;20160405;第53-56页 |
Also Published As
| Publication number | Publication date |
|---|---|
| CN105811957A (en) | 2016-07-27 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101507362B (en) | Touch sensitive actuator having a uniform actuation force and a maximum active area | |
| CN105811957B (en) | A kind of capacitance touch induced key and charactron driving multiplex circuit and method | |
| US20130076206A1 (en) | Touch pad controller | |
| CN102385451A (en) | Luminous band display type sliding touch bar and display method of touch luminous band | |
| CN202394744U (en) | Circuit and terminal capable of indicating key states through LED (light-emitting diode) lamps | |
| CN106656143A (en) | Touch and display drive module to remove the influence of LED on the touch buttons during the common use of the touch buttons and the LED and the method of the same | |
| KR20150086787A (en) | Lighting switch apparatus and lighting switching method | |
| CN202835677U (en) | Displayer and button integrated air-conditioner | |
| CN205566259U (en) | Capacitanc touch -sensitive button and digital tube drive multiplex circuit | |
| CN105373270A (en) | Touch control device | |
| CN201936167U (en) | Household intelligent control system | |
| CN103340014A (en) | Interference-free light-emitting means control | |
| CN204014205U (en) | A kind of LED lamp control device based on bluetooth, touch dual control | |
| CN106102290A (en) | A kind of device based on electronic ballast control electronic control circuit and lighting | |
| CN104992635A (en) | Touch control nixie tube | |
| CN203883814U (en) | Key detection circuit and electronic device | |
| CN106230425A (en) | A kind of band vibration touches switch on wall | |
| CN103151833A (en) | Electricity larceny prevention method and device | |
| CN102946245B (en) | Soft-touch control | |
| WO2013056320A1 (en) | Touch dimmer lighting control | |
| CN203104860U (en) | Touch switch | |
| CN202994982U (en) | Keyboard plate test tool | |
| CN105573130A (en) | Control panel and control method | |
| AU2009347165B2 (en) | Dimmer system and method | |
| CN204329090U (en) | Electricity cooking pot and control circuit thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20220527 Address after: 350000 room 8-2, 8th floor, Bosi software building, No. 5, Gaoxin Avenue, Shangjie Town, Minhou County, Fuzhou City, Fujian Province Patentee after: Fuzhou yaotianxin Electronics Co.,Ltd. Address before: 4 / F, physics North building, Fuzhou University, No. 523, Gongye Road, Fuzhou, Fujian 350002 Patentee before: FUZHOU FUDA HISI MICROELECTRONICS Co.,Ltd. |