CN116382995B - Detection chip and device for simultaneously detecting keyboard and touch pad - Google Patents
Detection chip and device for simultaneously detecting keyboard and touch pad Download PDFInfo
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- CN116382995B CN116382995B CN202310663355.8A CN202310663355A CN116382995B CN 116382995 B CN116382995 B CN 116382995B CN 202310663355 A CN202310663355 A CN 202310663355A CN 116382995 B CN116382995 B CN 116382995B
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- 238000001514 detection method Methods 0.000 title claims abstract description 141
- 238000004364 calculation method Methods 0.000 claims abstract description 17
- 230000008859 change Effects 0.000 claims abstract description 15
- 238000004148 unit process Methods 0.000 claims abstract description 4
- 239000003990 capacitor Substances 0.000 claims description 5
- 230000000149 penetrating effect Effects 0.000 claims description 3
- 238000004519 manufacturing process Methods 0.000 abstract description 2
- 238000010586 diagram Methods 0.000 description 8
- 238000012986 modification Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 2
- 230000001965 increasing effect Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
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Classifications
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F11/00—Error detection; Error correction; Monitoring
- G06F11/22—Detection or location of defective computer hardware by testing during standby operation or during idle time, e.g. start-up testing
- G06F11/2205—Detection or location of defective computer hardware by testing during standby operation or during idle time, e.g. start-up testing using arrangements specific to the hardware being tested
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F11/00—Error detection; Error correction; Monitoring
- G06F11/22—Detection or location of defective computer hardware by testing during standby operation or during idle time, e.g. start-up testing
- G06F11/2273—Test methods
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
- G06F3/02—Input arrangements using manually operated switches, e.g. using keyboards or dials
- G06F3/0202—Constructional details or processes of manufacture of the input device
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
- G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
- G06F3/033—Pointing devices displaced or positioned by the user, e.g. mice, trackballs, pens or joysticks; Accessories therefor
- G06F3/0354—Pointing devices displaced or positioned by the user, e.g. mice, trackballs, pens or joysticks; Accessories therefor with detection of 2D relative movements between the device, or an operating part thereof, and a plane or surface, e.g. 2D mice, trackballs, pens or pucks
- G06F3/03547—Touch pads, in which fingers can move on a surface
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
- G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
- G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
- G06F3/0416—Control or interface arrangements specially adapted for digitisers
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
- G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
- G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
- G06F3/044—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by capacitive means
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D10/00—Energy efficient computing, e.g. low power processors, power management or thermal management
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Theoretical Computer Science (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Human Computer Interaction (AREA)
- Computer Hardware Design (AREA)
- Quality & Reliability (AREA)
- Input From Keyboards Or The Like (AREA)
Abstract
The invention relates to a detection chip and a device for simultaneously detecting a keyboard and a touch pad, which belong to the technical field of intelligent equipment detection and comprise a touch detection module, a keyboard detection module and a calculation unit; the touch detection module is used for outputting a touch driving waveform signal to the touch panel, collecting capacitance value change signals of the touch panel and transmitting the capacitance value change signals to the calculation unit, and the calculation unit processes and calculates the change amounts of all capacitance value data to finally obtain finger touch coordinates; the keyboard detection module is used for detecting level signals output by each key unit of the keyboard, and the calculation unit collects the output level signal values of all the keyboard detection modules and judges whether the key units are pressed and the positions of the pressed key units. The invention greatly reduces the manufacturing cost and the assembly difficulty of terminal equipment such as a tablet computer, a computer and the like, integrates the touch control detection module and the keyboard detection module, and provides hardware feasibility for realizing keyboard/touch control and simultaneous detection of a single chip.
Description
Technical Field
The invention relates to the technical field of intelligent equipment detection, in particular to a detection chip and a device for simultaneously detecting a keyboard and a touch pad.
Background
At present, touch pad detection and keyboard detection on a mainstream notebook computer and a Bluetooth keyboard are respectively completed by two sets of systems which are respectively deployed on at least two circuit boards, the systems are relatively complex, the material cost is relatively high, and the assembly difficulty is increased by a plurality of circuit boards, so that how to integrate touch detection and keyboard detection on one chip is a problem which needs to be considered at present.
It should be noted that the information disclosed in the above background section is only for enhancing understanding of the background of the present disclosure and thus may include information that does not constitute prior art known to those of ordinary skill in the art.
Disclosure of Invention
The invention aims to overcome the defects of the prior art, provides a detection chip and a device for simultaneously detecting a keyboard and a touch pad, and solves the problems of the prior equipment.
The aim of the invention is achieved by the following technical scheme: the detection chip for simultaneously detecting the keyboard and the touch pad comprises a touch detection module, a keyboard detection module and a calculation unit; the touch detection module is used for outputting a touch driving waveform signal to the touch panel, collecting capacitance value change signals of the touch panel and transmitting the capacitance value change signals to the calculation unit, when a finger touches the touch panel, the node capacitance value changes to cause the signals detected by the touch detection module to change, and the calculation unit processes and calculates the change amount of all capacitance value data to finally obtain the finger touch coordinates;
the keyboard detection module is used for detecting level signals output by each key unit of the keyboard, when one key unit is pressed, the keyboard output wiring penetrating through the key unit is conducted with the keyboard input wiring, when the keyboard output wiring outputs low level, the connected keyboard input wiring is pulled down, the keyboard detection module detects low level, the calculation unit collects output values of all the keyboard detection modules, and whether the key unit is pressed and the position of the pressed key unit are judged.
The touch detection module comprises a capacitance detection RX pin, a touch detection unit, a capacitance detection TX pin and a touch driving unit;
the touch control driving units are in one-to-one correspondence with the number of the capacitance detection TX pins, and each touch control driving unit generates a touch control driving waveform and outputs the touch control driving waveform to the touch panel through the corresponding capacitance detection TX pin;
the number of the capacitive detection RX pins corresponds to the number of the touch detection units one by one, each capacitive detection RX pin receives a signal of the touch panel and then inputs the signal to the corresponding touch detection unit, and the touch detection unit detects the capacitance value of the node capacitor on the touch panel and transmits the capacitance value to the calculation unit.
The keyboard detection module comprises a keyboard output pin, a keyboard output unit, a keyboard input pin and a keyboard input unit;
the number of the keyboard input pins is in one-to-one correspondence with the number of the keyboard input units, each keyboard input pin is connected with the corresponding keyboard input unit through a pull-up resistor, and level signals of each key unit are acquired in real time through the keyboard input pins and are input into the computing unit through the keyboard input units;
the number of the keyboard output pins corresponds to the number of the keyboard output units one by one, and the calculating unit outputs corresponding level signals to the keyboard output pins through the keyboard output units.
A detection device for simultaneously detecting a keyboard and a touch pad comprises a detection chip;
the capacitive touch pad is connected with the detection chip and is used for receiving a touch control driving waveform signal output by the detection chip and outputting a capacitance value change signal to the detection chip; the keyboard outputs a level signal to the detection chip.
The capacitive touch pad comprises a plurality of TX wires which are longitudinally and sequentially arranged at equal intervals and a plurality of RX wires which are transversely and sequentially arranged at equal intervals, wherein the TX wires and the RX wires are not contacted, and a node capacitor is formed at the position where each TX wire and each RX wire vertically intersect; each TX wire is connected with a capacitance detection TX pin in the touch detection module, and each RX wire is connected with a capacitance detection RX pin in the touch detection module.
The keyboard comprises a plurality of key units, wherein each key unit is connected with a keyboard output pin in the keyboard detection module through a keyboard output wire, and is connected with a keyboard input pin in the keyboard detection module through a keyboard input wire.
The invention has the following advantages: a detection chip and a device for simultaneously detecting a keyboard and a touch pad can simultaneously detect the keyboard and the capacitive touch pad by using one detection chip and one circuit board, and the traditional scheme in the industry needs to use two chips and two circuit boards to respectively detect the keyboard and the capacitive touch pad. The scheme of the invention greatly reduces the manufacturing cost and the assembly difficulty of terminal equipment such as a tablet computer and the like; meanwhile, the keyboard has a capacitance detection TX/RX pin and a keyboard input/output pin, integrates a touch detection module and a keyboard detection module, and provides hardware feasibility for realizing keyboard/touch simultaneous detection of a single chip; the scheme that only a single chip is used for replacing the traditional two chips greatly reduces the overall power consumption of the module, and is beneficial to increasing the battery endurance of the mobile device.
Drawings
FIG. 1 is a schematic diagram of the structure of the device of the present invention;
FIG. 2 is a schematic diagram of a capacitive touch panel and a detection chip;
FIG. 3 is a schematic diagram of a structure of a signal transmitted from a detection chip;
FIG. 4 is a schematic diagram of a structure of a received signal in a detection chip;
FIG. 5 is a schematic diagram of a keyboard;
FIG. 6 is a schematic diagram of the connection of a keyboard to a detection chip;
FIG. 7 is a schematic diagram of an example of keyboard detection;
FIG. 8 is a schematic diagram of a detection-only keyboard according to the present invention.
Detailed Description
For the purposes of making the objects, technical solutions and advantages of the embodiments of the present application more clear, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is apparent that the described embodiments are only some embodiments of the present application, but not all embodiments. The components of the embodiments of the present application, which are generally described and illustrated in the figures herein, may be arranged and designed in a wide variety of different configurations. Accordingly, the following detailed description of the embodiments of the present application, provided in connection with the accompanying drawings, is not intended to limit the scope of the application, as claimed, but is merely representative of selected embodiments of the application. All other embodiments, which can be made by those skilled in the art based on the embodiments of the present application without making any inventive effort, are intended to be within the scope of the present application. The invention is further described below with reference to the accompanying drawings.
The invention can integrate the touch detection module and the keyboard detection module on one chip, realize the functions of capacitive touch pad detection and keyboard detection, and simultaneously work the two detection modules and output detection results. The technology can complete two functions of touch detection and keyboard detection by using only one circuit board, and can replace a scheme requiring a plurality of circuit boards in the traditional scheme. By utilizing the technology, the complexity of a keyboard and a touch system can be reduced, the assembly difficulty of equipment is reduced, the cost of the equipment is greatly reduced, and the power consumption of the equipment can be reduced.
As shown in fig. 1, the present invention mainly relates to two detected units, namely a capacitive touch pad and a keyboard. The detection chip can be connected with the capacitive touch pad and the keyboard simultaneously through the conductive connecting wires. The detection chip mainly comprises a touch detection module, a keyboard detection module and 3 core modules of a computing unit.
As shown in fig. 2, the internal circuit structure of the capacitive touch pad is a conductive trace staggered horizontally and vertically. One of which is a plurality of TX traces and a plurality of RX traces perpendicular to the TX traces. The TX wiring and the RX wiring are not contacted, and a node capacitor is formed between the two wirings at the crossing position of each TX wiring and each RX wiring. The TX and RX traces are connected to the capacitance detection TX and RX pins of the detection chip, respectively, through the conductive connection lines in fig. 1.
The touch detection module consists of a capacitance detection RX pin, a touch detection unit, a capacitance detection TX pin and a touch driving unit.
Specifically, as shown in fig. 3, the capacitance detection TX pins have a waveform output function, and can generate special touch driving waveforms, including but not limited to square waves, sine waves, triangular waves, step waves, and the like, so as to meet the size requirement of a conventional capacitance touch panel, and the number of the capacitance detection TX pins designed by the invention is 10 to 25. The capacitance detection TX pins are internally connected with a certain number of driving units, each unit independently operates, and independent touch control driving waveforms are output to the corresponding capacitance detection TX pins.
As shown in fig. 4, the capacitive detection RX pin can receive a signal of the capacitive touch pad, and send the signal to a plurality of touch detection units, where each touch detection unit corresponds to one capacitive detection RX pin. The touch detection unit can detect the capacitance value of the node capacitance on the capacitive touch pad. After the detection is completed, the touch detection unit transmits the capacitance value to the calculation unit. When a finger touches the capacitive touch pad, the node capacitance changes, so that signals detected by the detection unit change, and the calculation unit processes and calculates the change of all capacitance data, so that the finger touch coordinates are finally obtained. To meet the size requirements of conventional capacitive touch pads, the number of RX pins of the present design is 20 to 40.
As shown in fig. 5, the keyboard inner body is a keyboard output trace, a keyboard input trace, and a key unit. Each key unit corresponds to one key of the keyboard, and when the key is pressed, the corresponding key unit conducts the keyboard output wiring and the keyboard input wiring which pass through the unit.
As shown in fig. 6, the detection chip is designed with two sets of pins: a keyboard output pin and a keyboard input pin. These pins may be composed of general purpose digital pins GPIO, have a function of independently controlling input/output directions, and can independently configure pull-up and pull-down resistors. Wherein, keyboard output pin has connected the output wiring of keyboard. The keyboard input pin is connected with the input wiring of the keyboard, the input state is kept in the working process, and the internal pull-up resistor connected with the digital input pin is kept in the pull-up state. In the absence of any pressing, the keyboard input unit detects a high level due to the presence of the pull-up resistor, and the output value sent to the calculation unit is 1. In order to meet the requirement of the mainstream 89-key/104-key keyboard application, the keyboard input/output pins of the detection chip need to be 22-30, wherein the detection chip at least comprises 6 keyboard output pins and 16 keyboard output pins.
As shown in fig. 7, all the keyboard output units output low levels one by one in sequence after the detection chip starts to work, and when one detection unit outputs low, all the other detection units are in high resistance. In the absence of any depression, the keyboard input unit detects a high level due to the presence of the pull-up resistor, since all of the key units are in the off state. When a certain key unit is pressed, the keyboard output wiring penetrating through the key unit is conducted with the keyboard input wiring, and when the keyboard output unit corresponding to the keyboard output wiring outputs a low level, the connected keyboard input wiring is pulled down, and the keyboard detection module detects the low level. The computing unit collects the output values of all the keyboard detection modules, so that whether a key unit is pressed or not and which key is specifically pressed can be judged.
As shown in fig. 8, the present invention realizes both keyboard detection and capacitive touch detection through a single chip, and in practical module design, only one circuit board is required to realize two functions. Fig. 8 shows a modular design of one possible type. A detection chip, a capacitive touch pad and a keyboard connector are arranged on the module circuit board. In this scheme, capacitive touch pad and detection chip are on same circuit board, and the keyboard is connected through keyboard connector and detection chip through the keyboard connecting wire. The keyboard connection lines are typically a set of flexible flat cables.
The foregoing is merely a preferred embodiment of the invention, and it is to be understood that the invention is not limited to the form disclosed herein but is not to be construed as excluding other embodiments, but is capable of numerous other combinations, modifications and environments and is capable of modifications within the scope of the inventive concept, either as taught or as a matter of routine skill or knowledge in the relevant art. And that modifications and variations which do not depart from the spirit and scope of the invention are intended to be within the scope of the appended claims.
Claims (6)
1. The utility model provides a detect detection chip of keyboard and touch pad simultaneously which characterized in that: the device comprises a touch detection module, a keyboard detection module and a calculation unit; the touch detection module is used for outputting a touch driving waveform signal to the touch panel, collecting capacitance value change signals of the touch panel and transmitting the capacitance value change signals to the calculation unit, when a finger touches the touch panel, the node capacitance value changes to cause the signals detected by the touch detection module to change, and the calculation unit processes and calculates the change amount of all capacitance value data to finally obtain the finger touch coordinates;
the keyboard detection module is used for detecting level signals output by each key unit of the keyboard, when one key unit is pressed, the keyboard output wiring penetrating through the key unit is conducted with the keyboard input wiring, when the keyboard output wiring outputs low level, the connected keyboard input wiring is pulled down, the keyboard detection module detects low level, the calculation unit collects output values of all the keyboard detection modules, and whether the key unit is pressed and the position of the pressed key unit are judged.
2. The detection chip for simultaneously detecting a keyboard and a touch pad according to claim 1, wherein: the touch detection module comprises a capacitance detection RX pin, a touch detection unit, a capacitance detection TX pin and a touch driving unit;
the touch control driving units are in one-to-one correspondence with the number of the capacitance detection TX pins, and each touch control driving unit generates a touch control driving waveform and outputs the touch control driving waveform to the touch panel through the corresponding capacitance detection TX pin;
the number of the capacitive detection RX pins corresponds to the number of the touch detection units one by one, each capacitive detection RX pin receives a signal of the touch panel and then inputs the signal to the corresponding touch detection unit, and the touch detection unit detects the capacitance value of the node capacitor on the touch panel and transmits the capacitance value to the calculation unit.
3. The detection chip for simultaneously detecting a keyboard and a touch pad according to claim 1, wherein: the keyboard detection module comprises a keyboard output pin, a keyboard output unit, a keyboard input pin and a keyboard input unit;
the number of the keyboard input pins is in one-to-one correspondence with the number of the keyboard input units, each keyboard input pin is connected with the corresponding keyboard input unit through a pull-up resistor, and level signals of each key unit are acquired in real time through the keyboard input pins and are input into the computing unit through the keyboard input units;
the number of the keyboard output pins corresponds to the number of the keyboard output units one by one, and the calculating unit outputs corresponding level signals to the keyboard output pins through the keyboard output units.
4. The utility model provides a detection device of simultaneous detection keyboard and touch pad which characterized in that: comprising a detection chip according to any one of claims 1-3;
the capacitive touch pad is connected with the detection chip and is used for receiving a touch control driving waveform signal output by the detection chip and outputting a capacitance value change signal to the detection chip; the keyboard outputs a level signal to the detection chip.
5. The detecting device for simultaneously detecting a keyboard and a touch panel according to claim 4, wherein: the capacitive touch pad comprises a plurality of TX wires which are longitudinally and sequentially arranged at equal intervals and a plurality of RX wires which are transversely and sequentially arranged at equal intervals, wherein the TX wires and the RX wires are not contacted, and a node capacitor is formed at the position where each TX wire and each RX wire vertically intersect; each TX wire is connected with a capacitance detection TX pin in the touch detection module, and each RX wire is connected with a capacitance detection RX pin in the touch detection module.
6. The detecting device for simultaneously detecting a keyboard and a touch panel according to claim 4, wherein: the keyboard comprises a plurality of key units, wherein each key unit is connected with a keyboard output pin in the keyboard detection module through a keyboard output wire, and is connected with a keyboard input pin in the keyboard detection module through a keyboard input wire.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310663355.8A CN116382995B (en) | 2023-06-06 | 2023-06-06 | Detection chip and device for simultaneously detecting keyboard and touch pad |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310663355.8A CN116382995B (en) | 2023-06-06 | 2023-06-06 | Detection chip and device for simultaneously detecting keyboard and touch pad |
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| Publication Number | Publication Date |
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| CN116382995A CN116382995A (en) | 2023-07-04 |
| CN116382995B true CN116382995B (en) | 2023-08-08 |
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| CN202310663355.8A Active CN116382995B (en) | 2023-06-06 | 2023-06-06 | Detection chip and device for simultaneously detecting keyboard and touch pad |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101963930A (en) * | 2009-07-21 | 2011-02-02 | 纬创资通股份有限公司 | Automatic test device |
| CN106646202A (en) * | 2017-02-24 | 2017-05-10 | 常州信息职业技术学院 | Touch key circuit board function display and detection system |
| CN114371787A (en) * | 2021-12-28 | 2022-04-19 | 华南理工大学 | Keyboard with real-time touch sensing function |
| CN115599234A (en) * | 2021-07-09 | 2023-01-13 | 上海思立微电子科技有限公司（Cn） | Touch detection method, medium, touch chip and touch display device |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8125250B2 (en) * | 2010-03-26 | 2012-02-28 | Apple Inc. | Frequency detection mechanism for a clock generation circuit |
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- 2023-06-06 CN CN202310663355.8A patent/CN116382995B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101963930A (en) * | 2009-07-21 | 2011-02-02 | 纬创资通股份有限公司 | Automatic test device |
| CN106646202A (en) * | 2017-02-24 | 2017-05-10 | 常州信息职业技术学院 | Touch key circuit board function display and detection system |
| CN115599234A (en) * | 2021-07-09 | 2023-01-13 | 上海思立微电子科技有限公司（Cn） | Touch detection method, medium, touch chip and touch display device |
| CN114371787A (en) * | 2021-12-28 | 2022-04-19 | 华南理工大学 | Keyboard with real-time touch sensing function |
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| CN116382995A (en) | 2023-07-04 |
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Effective date of registration: 20231019 Address after: 518000, Building 7, Building 1003, Hongshan 69792, Daling Community, Minzhi Street, Longhua District, Shenzhen City, Guangdong Province Patentee after: Shenzhen Xincan Technology Co.,Ltd. Address before: Room 2006, 20th Floor, Unit 1, Building 2, No. 99, Jinhui West 1st Street, Hi tech Zone, Chengdu, Sichuan 610000 Patentee before: Chengdu Xincan Technology Co.,Ltd. |