CN108170193B - Output adjusting method and system of power supply substrate of display device - Google Patents
Output adjusting method and system of power supply substrate of display device Download PDFInfo
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05F—SYSTEMS FOR REGULATING ELECTRIC OR MAGNETIC VARIABLES
- G05F1/00—Automatic systems in which deviations of an electric quantity from one or more predetermined values are detected at the output of the system and fed back to a device within the system to restore the detected quantity to its predetermined value or values, i.e. retroactive systems
- G05F1/10—Regulating voltage or current
- G05F1/46—Regulating voltage or current wherein the variable actually regulated by the final control device is dc
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
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- 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
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Abstract
The invention discloses an output adjusting method and system of a power supply substrate of a display device, wherein the method comprises the following steps: acquiring a test reading value of the output current/voltage of the power supply substrate obtained by equipment and a test actual value obtained by standard equipment under the condition of acquiring set values of different currents/voltages in an output range; drawing a first relation curve between a set value of the current/voltage and a test actual value and a second relation curve between the test actual value and a test read value; collecting a current reading value of the output current/voltage of the power supply substrate and substituting the current reading value into a second relation curve to obtain a current actual value; establishing a third relation curve between the current actual value and the test actual value and obtaining a corresponding test actual value; and substituting the corresponding test actual value into the first relation curve to obtain a corresponding set value of the current/voltage, and adjusting the set value of the current/voltage according to the set value. The invention can realize that the output current/voltage value of the power supply substrate of the display devices such as OLED, TFT-LCD and the like closely follows the set value.
Description
Technical Field
The invention relates to the technical field of display. And more particularly, to an output adjustment method and system of a power substrate of a display device.
Background
For the situation that the deviation between the actual output value and the set value of the power supply substrate of the display device such as an OLED, a TFT-LCD and the like in the process of leaving factory and working exceeds the allowable range, the existing solution is to manually participate in fine adjustment of a potentiometer to enable the output of the potentiometer to meet the specification range. The disadvantages of this approach are: firstly, the precision of manual adjustment is not high; secondly, the consistency is poor, and large data deviation can occur particularly in batch production and use; thirdly, the workload is large, which is not beneficial to large-scale automatic production; fourth, maintainability is not high and recalibration is required after power substrate repair and replacement.
Currently, OLED display (organic electroluminescence display) is gradually replacing conventional TFT-LCD display (liquid crystal display) as a leading technology of next generation display. The breakthrough innovation from TFT-LCD to OLED is not only display technology, but also its requirement for precision of driving power is increasing. And the condition that the OLED power supply substrate can supply power with high precision in large batch, long time and different environments is necessary for mass production of the OLED.
Therefore, it is desirable to provide a power supply substrate suitable for OLED, TFT-LCD and other display devices, and particularly suitable for OLED power supply substrates, and an output adjustment method and system for power supply substrates, which can make the current/voltage value output by the power supply substrate closely follow the set current/voltage value, and can automatically adjust the output current/voltage value of the power supply substrate under severe conditions such as high temperature and high humidity, so as to control the accuracy within the allowable range.
Disclosure of Invention
The invention aims to provide an output adjusting method and system of a power supply substrate.
In order to achieve the purpose, the invention adopts the following technical scheme:
the invention discloses an output adjusting method of a power supply substrate of a display device, which comprises the following steps:
acquiring a test reading value of the output current/voltage of the power supply substrate acquired by acquisition equipment under the condition of acquiring set values of different currents/voltages within the current/voltage output range of the power supply substrate and acquiring a test actual value of the output current/voltage of the power supply substrate acquired by standard equipment;
drawing a first relation curve between a set value and a test actual value of the current/voltage and a second relation curve between the test actual value and a test read value, and storing the first relation curve and the second relation curve in a display panel signal driving unit;
acquiring a current reading value of the output current/voltage of the power supply substrate by using a display panel signal driving unit, and substituting the current reading value into a second relation curve to obtain a current actual value of the output current/voltage of the power supply substrate;
establishing a third relation curve between the current actual value and the test actual value under the condition of different set values of current/voltage, and substituting the current actual value into the third relation curve to obtain a test actual value corresponding to the current actual value;
and substituting the test actual value corresponding to the current actual value into the first relation curve to obtain the set value of the current/voltage corresponding to the current actual value, and adjusting the set value of the current/voltage according to the set value of the current/voltage corresponding to the current actual value.
Preferably, the storing the first relation curve and the second relation curve in the display panel signal driving unit further comprises: the first relation curve and the second relation curve are segmented respectively to regard each line segment of the first relation curve and the second relation curve as a straight line, and the segmented first relation curve and the segmented second relation curve are stored in the display panel signal driving unit.
The invention also discloses an output adjusting system of the power supply substrate of the display device, which comprises: the device comprises acquisition equipment, standard equipment, computing equipment and a display panel signal driving unit;
the acquisition equipment and the standard equipment acquire a test reading value and a test actual value of the output current/voltage of the power supply substrate within the current/voltage output range of the power supply substrate respectively;
the computing equipment is used for drawing a first relation curve between a set value and a test actual value of the current/voltage and a second relation curve between the test actual value and a test read value, and storing the first relation curve and the second relation curve in the display panel signal driving unit;
the display panel signal driving unit is used for acquiring the current reading value of the output current/voltage of the power supply substrate and substituting the current reading value into the second relation curve to obtain the current actual value; establishing a third relation curve between the current actual value and the test actual value under the condition of different set values of current/voltage, and substituting the current actual value into the third relation curve to obtain a test actual value corresponding to the current actual value; and substituting the test actual value corresponding to the current actual value into the first relation curve to obtain the set value of the current/voltage corresponding to the current actual value, and adjusting the set value of the current/voltage according to the set value of the current/voltage corresponding to the current actual value.
Preferably, the computing device further segments the first relational curve and the second relational curve respectively to regard each line segment of the first relational curve and the second relational curve as a straight line, and stores the segmented first relational curve and second relational curve in the display panel signal driving unit.
Preferably, the standard device is a standard current/voltage meter.
The invention has the following beneficial effects:
the technical scheme of the invention can ensure that the current/voltage value output by the power supply substrate closely follows the set current/voltage value during the period of factory shipment and work of the power supply substrate of display devices such as OLED, TFT-LCD and the like, and can automatically calibrate and adjust the output current/voltage value of the power supply substrate under severe conditions such as high temperature, high humidity and the like, so that the precision of the current/voltage value output by the power supply substrate is controlled within an allowable range, and the influence of the aging and temperature drift of a signal driving unit of the power supply substrate or a display panel on the precision of the current/voltage value output by the power supply substrate is avoided.
Drawings
The following describes embodiments of the present invention in further detail with reference to the accompanying drawings;
fig. 1 shows a flowchart of an output adjustment method of a power supply substrate of a display device.
Fig. 2 shows a schematic diagram of an output adjustment system of a power supply substrate of a display device.
In FIG. 3, 3-a, 3-b and 3-c show schematic diagrams of second dependence curves for current, respectively.
In fig. 4, 4-a and 4-b show schematic diagrams of a first and a second relation, respectively, for voltage.
Detailed Description
In order to more clearly illustrate the invention, the invention is further described below with reference to preferred embodiments and the accompanying drawings. Similar parts in the figures are denoted by the same reference numerals. It is to be understood by persons skilled in the art that the following detailed description is illustrative and not restrictive, and is not to be taken as limiting the scope of the invention.
As shown in fig. 1, this embodiment provides an output adjustment method for a power supply substrate of a display device, where the display device in this embodiment takes an OLED as an example, and the method includes:
the OLED power supply substrate delivery test stage comprises:
acquiring a test reading value of the output current/voltage of the OLED power supply substrate acquired by acquisition equipment under the condition of acquiring set values of different currents/voltages within the current/voltage output range of the OLED power supply substrate and acquiring a test actual value of the output current/voltage of the OLED power supply substrate acquired by standard equipment;
drawing a first relation curve between a set value of current/voltage and a test actual value of output current/voltage of the OLED power supply substrate and a second relation curve between the test actual value of the output current/voltage of the OLED power supply substrate and a test read value of the output current/voltage of the OLED power supply substrate, and storing the first relation curve and the second relation curve in a signal driving unit of the OLED display panel;
the OLED power supply substrate working stage comprises:
acquiring a current read value of the output current/voltage of the OLED power supply substrate by using an OLED display panel signal driving unit, and substituting the current read value of the output current/voltage of the OLED power supply substrate into a second relation curve to obtain a current actual value of the output current/voltage of the OLED power supply substrate;
establishing a third relation curve between the current actual value of the output current/voltage of the OLED power supply substrate and the test actual value of the output current/voltage of the OLED power supply substrate under the condition of different set values of the current/voltage, and substituting the current actual value of the output current/voltage of the OLED power supply substrate into the third relation curve to obtain the test actual value of the output current/voltage of the OLED power supply substrate corresponding to the current actual value of the output current/voltage of the OLED power supply substrate;
and substituting the test actual value of the output current/voltage of the OLED power supply substrate corresponding to the current actual value of the output current/voltage of the OLED power supply substrate into the first relation curve to obtain the set value of the current/voltage corresponding to the current actual value of the output current/voltage of the OLED power supply substrate, and adjusting the set value of the current/voltage according to the set value of the current/voltage corresponding to the current actual value of the output current/voltage of the OLED power supply substrate.
In practical implementation, since the voltage and the current are adjustable in a wide range and the linearity of the voltage and the current is not a straight line in the whole range, storing the first relation curve and the second relation curve in the OLED display panel signal driving unit further includes: and segmenting the first relation curve and the second relation curve respectively to regard each line segment of the first relation curve and the second relation curve as a straight line, and storing the segmented first relation curve and the segmented second relation curve in the OLED display panel signal driving unit. Thus, the first and second relationships for current and voltage are divided into segments over the entire span, and the current and voltage obtained are integrated for each segment.
As shown in fig. 2, this embodiment further provides an output adjustment system of a power supply substrate of a display device, where the display device in this embodiment is also an OLED as an example, the system includes: the system comprises acquisition equipment, standard equipment, computing equipment and an OLED display panel signal driving unit; in fig. 2, the acquisition device and the computing device are integrated in a PC, and the OLED display panel signal driving unit includes an MCU and a FLASH memory (not shown in fig. 2);
the acquisition equipment and the standard equipment acquire a test read value and a test actual value of the output current/voltage of the OLED power supply substrate within the current/voltage output range of the OLED power supply substrate respectively;
the computing equipment is used for drawing a first relation curve between a set value of current/voltage and a test actual value of output current/voltage of the OLED power supply substrate and a second relation curve between the test actual value of the output current/voltage of the OLED power supply substrate and a test read value of the output current/voltage of the OLED power supply substrate, and storing the first relation curve and the second relation curve in the signal driving unit of the OLED display panel;
the OLED display panel signal driving unit is used for acquiring the current read value of the output current/voltage of the OLED power supply substrate and substituting the current read value into the second relation curve to obtain the current actual value of the output current/voltage of the OLED power supply substrate; establishing a third relation curve between the current actual value of the output current/voltage of the OLED power supply substrate and the test actual value of the output current/voltage of the OLED power supply substrate under the condition of different set values of the current/voltage, and substituting the current actual value of the output current/voltage of the OLED power supply substrate into the third relation curve to obtain the test actual value of the output current/voltage of the OLED power supply substrate corresponding to the current actual value of the output current/voltage of the OLED power supply substrate; substituting the test actual value of the output current/voltage of the OLED power supply substrate corresponding to the current actual value of the output current/voltage of the OLED power supply substrate into the first relation curve to obtain the set value of the current/voltage corresponding to the current actual value of the output current/voltage of the OLED power supply substrate, adjusting the set value of the current/voltage according to the set value of the current/voltage corresponding to the current actual value of the output current/voltage of the OLED power supply substrate, controlling the precision of the current/voltage value output by the OLED power supply substrate within an allowable range, and avoiding the influence of the aging and temperature drift of a signal driving unit of the OLED power supply substrate or an OLED display panel on the precision of the current/voltage value output by the OLED power supply substrate
In this embodiment, the OLED display panel signal driving unit includes an MCU and a FLASH memory (not shown in fig. 2), and the Check board in fig. 2 is a substrate of a calibration jig for simulating a load. The analog-to-digital conversion part of the OLED display panel signal driving unit takes a chip with 16bit and 1MHZ as a conversion main body, and the MCU reads the conversion value of the ADC in a timing mode in an SPI communication mode when acquiring the current reading value of the current/voltage output by the OLED power supply substrate.
In specific implementation, since the voltage and the current are adjustable in a large range, and the linearity of the voltage and the current is not a straight line in the whole range, the computing device further segments the first relation curve and the second relation curve respectively to regard each line segment of the first relation curve and the second relation curve as a straight line, and stores the segmented first relation curve and the segmented second relation curve in the OLED display panel signal driving unit. Thus, the first and second relationships for current and voltage are divided into segments over the entire span, and the current and voltage obtained are integrated for each segment.
In a specific implementation, the standard device is a standard current/voltage meter.
The output adjustment system of the power substrate of the display device provided in this embodiment is further described below by taking an OLED as an example and substituting into a specific scene.
Data acquisition of an OLED power supply substrate delivery test stage is carried out on acquisition equipment: data acquisition of the OLED power supply substrate in a factory test stage is divided into two parts, namely voltage and current, acquisition equipment integrated in a PC reads a current/voltage value transmitted by a signal driving unit of an OLED display panel in a serial port communication mode to serve as a test read value of output current/voltage of the OLED power supply substrate, and reads a test actual value of the output current/voltage of the OLED power supply substrate acquired by standard equipment.
Regarding the calibration adjustment of the output current:
in the factory testing stage of the OLED power supply substrate, according to the requirements of the maximum output current 2A, three gears and the precision 1Ua of the OLED display panel signal driving unit, the power supply is independent in the gears during calibration, and is conducted in a segmented mode in a measuring range, namely, each gear checking machine samples the current values of 8 load points respectively, conducts digital filtering and processing on the current values and then uploads the current values to a PC (personal computer), the PC fills a table 1 according to collected data, specifically collects the current values of the load points in a grading mode for accessing a verification jig substrate, fills the table 1 according to the test reading value of the output current of the OLED power supply substrate transmitted by the OLED display panel signal driving unit and the test actual value of the output current of the OLED power supply substrate transmitted by standard equipment, and transmits the table 1 to a FLASH memory in the OLED display panel signal driving unit. The data units in table 1 are uA.
TABLE 1
In the working stage of the OLED power supply substrate, the current reading value of the output current is taken as an abscissa by the OLED display panel signal driving unit according to a specific gear, and the value mapped by the second relation curves shown as 3-a, 3-b and 3-c in FIG. 3 is taken as the current actual value of the output current. The current reading value after the MCU adjusts the current setting value is shown in table 2. The data units in table 2 are uA.
TABLE 2
It can be seen from table 2 that the current data after the adjustment strictly follows the standard value.
Regarding the calibration adjustment of the output voltage:
in the factory test stage of the OLED power supply substrate, the voltage acquisition mode is similar to current acquisition, the OLED display panel signal driving unit has 8 independent voltage modules which can be digitally programmed, each module acquires three groups of voltage values as shown in table 3, the PC fills the table 3 according to the test reading value of the output voltage of the OLED power supply substrate transmitted by the OLED display panel signal driving unit and the test actual value of the output voltage of the OLED power supply substrate transmitted by the standard equipment, and sends the table 3 to a FLASH memory in the OLED display panel signal driving unit for storage. The acquisition point selects a point at two ends or in the middle of the measuring range according to the requirement of the measuring range so as to contain the value of the whole measuring range. Data in mV in Table 3.
TABLE 3
| Voltage of | Module 1 | |
|
|
Module 5 | Module 6 | Module 7 | Module 8 |
| Set value 1 | 1700 | 1700 | 1700 | 1700 | 1700 | 1700 | 1700 | 1700 |
| Test read value 1 | 1638 | 1642 | 1621 | 1693 | 1674 | 1673 | 1662 | 1670 |
| Testing the actual value 1 | 1692 | 1694 | 1692 | 1700 | 1683 | 1701 | 1693 | 1696 |
| |
3300 | 3300 | 3300 | 3300 | 3300 | 3300 | 3300 | 3300 |
| Test read 2 | 3226 | 3242 | 3219 | 3295 | 3278 | 3282 | 3199 | 3250 |
| Testing of |
3292 | 3294 | 3297 | 3300 | 3287 | 3302 | 3298 | 3296 |
| |
9000 | 9000 | 9000 | 9000 | 9000 | 9000 | 9000 | 9000 |
| |
8933 | 8921 | 8893 | 8901 | 8972 | 8962 | 8862 | 8912 |
| Test |
8992 | 8996 | 8973 | 8998 | 9012 | 9016 | 8987 | 9018 |
After receiving the content in table 3, the OLED display panel signal driving unit fits the data of each power supply module into 2 curves, that is, a first relation curve between the set value of the voltage and the test actual value of the output voltage of the OLED power supply substrate and a second relation curve between the test actual value of the output voltage of the OLED power supply substrate and the test read value of the output voltage of the OLED power supply substrate. Taking a module as an example, the first relation is shown as 4-a in fig. 4, and the second relation is shown as 4-b in fig. 4. The set value of the current voltage is adjusted by the MCU as shown in table 4. Data in mV in Table 4.
TABLE 4
| Voltage of | Module 1 | |
|
|
Module 5 | Module 6 | Module 7 | Module 8 |
| Set value 1 | 1700 | 1700 | 1700 | 1700 | 1700 | 1700 | 1700 | 1700 |
| Current read value 1 | 1700 | 1700 | 1700 | 1700 | 1700 | 1700 | 1700 | 1700 |
| Current actual value 1 | 1700 | 1700 | 1700 | 1700 | 1700 | 1700 | 1700 | 1700 |
| |
3300 | 3300 | 3300 | 3300 | 3300 | 3300 | 3300 | 3300 |
| Current read |
3300 | 3300 | 3300 | 3300 | 3300 | 3300 | 3300 | 3300 |
| Current |
3300 | 3300 | 3300 | 3300 | 3300 | 3300 | 3300 | 3300 |
| |
9000 | 9000 | 9000 | 9000 | 9000 | 9000 | 9000 | 9000 |
| Current read |
9000 | 9000 | 9000 | 9000 | 9000 | 9000 | 9000 | 9000 |
| Current |
9000 | 9000 | 9000 | 9000 | 9000 | 9000 | 9000 | 9000 |
Table 4 shows the output values of the modules after the adjustment, and the read values are strictly consistent with the set values.
The invention is used for calibrating current/voltage and compensating errors when the OLED power supply substrate and the OLED display panel signal driving unit are produced, debugged and normally operated. The whole calibration and adjustment process is automatically completed by the mutual matching of the PC and the OLED display panel signal driving unit without manual participation, so that the calibration and adjustment accuracy is high and the speed is high.
In the description of the present invention, it should be noted that the terms "upper", "lower", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, which are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and operate, and thus, should not be construed as limiting the present invention. Unless expressly stated or limited otherwise, the terms "mounted," "connected," and "connected" are intended to be inclusive and mean, for example, that they may be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
It is further noted that, in the description of the present invention, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
It should be understood that the above-mentioned embodiments of the present invention are only examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention, and it will be obvious to those skilled in the art that other variations and modifications can be made on the basis of the above description, and all embodiments cannot be exhaustive, and all obvious variations and modifications belonging to the technical scheme of the present invention are within the protection scope of the present invention.
Claims (5)
1. An output adjustment method of a power supply substrate of a display device, comprising:
acquiring a test reading value of the output current/voltage of the power supply substrate acquired by acquisition equipment under the condition of acquiring set values of different currents/voltages within the current/voltage output range of the power supply substrate and acquiring a test actual value of the output current/voltage of the power supply substrate acquired by standard equipment;
drawing a first relation curve between a set value and a test actual value of the current/voltage and a second relation curve between the test actual value and a test read value, and storing the first relation curve and the second relation curve in a display panel signal driving unit;
acquiring a current reading value of the output current/voltage of the power supply substrate by using a display panel signal driving unit, and substituting the current reading value into a second relation curve to obtain a current actual value of the output current/voltage of the power supply substrate;
establishing a third relation curve between the current actual value and the test actual value under the condition of different set values of current/voltage, and substituting the current actual value into the third relation curve to obtain a test actual value corresponding to the current actual value;
and substituting the test actual value corresponding to the current actual value into the first relation curve to obtain the set value of the current/voltage corresponding to the current actual value, and adjusting the set value of the current/voltage according to the set value of the current/voltage corresponding to the current actual value.
2. The method of adjusting output of a power supply substrate of a display device according to claim 1, wherein the storing of the first relation curve and the second relation curve in the display panel signal driving unit further comprises: the first relation curve and the second relation curve are segmented respectively to regard each line segment of the first relation curve and the second relation curve as a straight line, and the segmented first relation curve and the segmented second relation curve are stored in the display panel signal driving unit.
3. An output adjustment system of a power supply substrate of a display device, comprising: the device comprises acquisition equipment, standard equipment, computing equipment and a display panel signal driving unit;
the acquisition equipment and the standard equipment acquire a test reading value and a test actual value of the output current/voltage of the power supply substrate within the current/voltage output range of the power supply substrate respectively;
the computing equipment is used for drawing a first relation curve between a set value and a test actual value of the current/voltage and a second relation curve between the test actual value and a test read value, and storing the first relation curve and the second relation curve in the display panel signal driving unit;
the display panel signal driving unit is used for acquiring the current reading value of the output current/voltage of the power supply substrate and substituting the current reading value into the second relation curve to obtain the current actual value; establishing a third relation curve between the current actual value and the test actual value under the condition of different set values of current/voltage, and substituting the current actual value into the third relation curve to obtain a test actual value corresponding to the current actual value; and substituting the test actual value corresponding to the current actual value into the first relation curve to obtain the set value of the current/voltage corresponding to the current actual value, and adjusting the set value of the current/voltage according to the set value of the current/voltage corresponding to the current actual value.
4. The output adjustment system of a power supply substrate of a display device according to claim 3, wherein the computing device further segments the first relational curve and the second relational curve respectively to regard each line segment of the first relational curve and the second relational curve as a straight line, and stores the segmented first relational curve and second relational curve in the display panel signal driving unit.
5. The output adjustment system of a power supply substrate for a display device according to claim 3, wherein the standard device is a standard current/voltage meter.
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| CN101446503A (en) * | 2007-11-27 | 2009-06-03 | 中芯国际集成电路制造(上海)有限公司 | Method for indicating values of corrector and device thereof |
| CN104157228A (en) * | 2014-07-23 | 2014-11-19 | 武汉精测电子技术股份有限公司 | Regulating and testing method and system for ShortingBar output precision of OLED |
| CN106330296A (en) * | 2016-08-31 | 2017-01-11 | 无锡市电子仪表工业有限公司 | Method for calibrating, compensating and self-correcting parameters of optical module |
| CN107121656A (en) * | 2017-04-28 | 2017-09-01 | 茂硕电源科技股份有限公司 | A kind of power supply automatic calibrating method and device |
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Address after: 215000 Qingqiu Lane 8, Suzhou Industrial Park, Suzhou City, Jiangsu Province Applicant after: Suzhou Huaxing source Polytron Technologies Inc Address before: 215000 East Fang Industrial Park Building, No. 1 Huayun Road, Suzhou Park, Jiangsu Province Applicant before: Suzhou HYC Electronic Technology Co., Ltd. |
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