CN215339612U - Crack detection line structure and display panel - Google Patents
Crack detection line structure and display panel Download PDFInfo
- Publication number
- CN215339612U CN215339612U CN202120768561.1U CN202120768561U CN215339612U CN 215339612 U CN215339612 U CN 215339612U CN 202120768561 U CN202120768561 U CN 202120768561U CN 215339612 U CN215339612 U CN 215339612U
- Authority
- CN
- China
- Prior art keywords
- detection
- line
- line segments
- display panel
- frame
- 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.)
- Expired - Fee Related
Links
Images
Landscapes
- Devices For Indicating Variable Information By Combining Individual Elements (AREA)
Abstract
The utility model provides a crack detection line structure, which comprises a plurality of detection units; the detection unit comprises a wiring terminal and a detection line; the detection line comprises a plurality of first line segments and a plurality of second line segments, and the first line segments are alternately connected with the second line segments. The utility model also provides a display panel, which comprises the crack detection line structure and a panel body, wherein the panel body comprises a display area and a non-display area, and a plurality of detection lines are all positioned on the non-display area and are arranged along the circumferential direction of the non-display area. When a crack occurs in the non-display area, the first line segment and/or the second line segment passing through the crack are broken. After the wiring terminal is respectively connected with the cathode and the anode of the external circuit, whether the detection line is broken can be judged according to the on-off condition of the circuit, and then whether cracks exist on the non-display area is judged. The detection lines are distributed in different areas on the non-display area, and when the circuit of one detection unit is disconnected, a detector can quickly locate the position of the crack.
Description
Technical Field
The utility model relates to the technical field of display, in particular to a crack detection circuit structure and a display panel.
Background
With the development of display technologies, display panels are gradually miniaturized, such as smart phones, smart watches, and the like. During the manufacturing and testing process of the display panel, the circuit of the display panel is often broken, and especially the flexible display panel has a higher risk of breaking. Therefore, it is necessary to detect cracks on the display panel to ensure good product yield.
The existing means for detecting the cracks is not beneficial to a detector to quickly locate the cracks, and has defects.
SUMMERY OF THE UTILITY MODEL
In order to solve the problem that the means for detecting the cracks in the prior art is not beneficial to a detector to quickly locate the cracks, the utility model aims to provide a crack detection line structure.
The utility model provides the following technical scheme:
a crack detection circuit structure is applied to a display panel and comprises a plurality of detection units;
the detection unit comprises connecting terminals and detection lines, the connecting terminals are arranged in pairs, and two ends of the detection lines are respectively connected with the two connecting terminals;
the detection line comprises a plurality of first line segments and a plurality of second line segments, the first line segments are arranged along a first direction, the second line segments are arranged along a second direction, and the first line segments and the second line segments are alternately connected.
As a further alternative to the crack detection line structure, each of the first line segment and the second line segment is located in at least two planes, and the detection line further includes a plurality of third line segments, and the first line segments and the second line segments located in different planes are connected by the third line segments.
Another object of the present invention is to provide a display panel.
The utility model provides the following technical scheme:
a display panel comprises the crack detection line structure and a panel body, wherein the panel body comprises a display area and a non-display area, the non-display area is arranged around the display area, and a plurality of detection lines are arranged on the non-display area and arranged along the circumferential direction of the non-display area.
As a further optional scheme for the crack detection line structure, a GOA routing area, an EOA routing area, and a VSS routing area are disposed on the non-display area, and the detection line covers at least one of the GOA routing area, the EOA routing area, and the VSS routing area.
As a further alternative to the display panel, the detection lines extend in a third direction as a whole, are folded back and forth in the second direction, and the third direction is parallel to the first direction.
As a further optional solution to the display panel, the detection line includes a plurality of first detection sections, each of the first detection sections includes a plurality of first line segments and a plurality of second line segments, the first detection sections are arranged along a third direction and connected in series, and the first detection sections extend along the second direction as a whole.
As a further alternative to the display panel, the detection line includes a plurality of second detection sections, each of the second detection sections includes one of the first line segments and one of the second line segments, the second detection sections are arranged along a third direction and connected in series, and the first direction and the second direction are obliquely intersected with the third direction.
As a further alternative to the display panel, the third direction is a circumferential direction of the non-display area.
As a further optional scheme for the display panel, the panel body is cuboid, and one end of the panel body along the length direction is provided with a chip on film;
the non-display area comprises a first frame where the chip on film is located, a second frame opposite to the chip on film and two third frames adjacent to the chip on film;
the detection lines of the three detection units are respectively positioned on the second frame and the two third frames.
As a further optional scheme for the display panel, the connection terminals are all located on the first frame, connection lines are arranged between the detection lines located on the second frame and the corresponding connection terminals, and the connection lines pass through the third frame.
The embodiment of the utility model has the following beneficial effects:
the first line segments and the second line segments are alternately arranged on the non-display area, and when a crack occurs in the non-display area, the first line segments and/or the second line segments passing through the crack are broken. After connecting the connecting terminals at the two ends of the detection line with the cathode and the anode of the external circuit respectively, whether the detection line is broken can be judged according to the on-off condition of the circuit, and then whether cracks exist on the non-display area is judged. The detection units are provided with a plurality of detection lines which are distributed in different areas on the non-display area, and when a circuit of one detection unit is disconnected, detection personnel can quickly position the position of the crack according to the area where the corresponding detection lines are distributed.
In order to make the aforementioned objects, features and advantages of the present invention more comprehensible and comprehensible, preferred embodiments accompanied with figures are described in detail below.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.
Fig. 1 is a schematic diagram illustrating an overall structure of a crack detection circuit structure provided in embodiment 1 of the present invention;
fig. 2 is a schematic diagram illustrating an overall structure of a display panel according to embodiment 2 of the present invention;
FIG. 3 shows an enlarged schematic view at A in FIG. 2;
fig. 4 is a schematic structural diagram illustrating a panel body in a display panel according to embodiment 2 of the present invention;
fig. 5 is a schematic structural diagram illustrating a detection unit in a display panel according to embodiment 2 of the present invention;
fig. 6 is a schematic diagram illustrating a structure of a detection line in a display panel according to embodiment 3 of the present invention;
fig. 7 is a schematic structural diagram illustrating a detection unit in a display panel according to embodiment 4 of the present invention;
fig. 8 is a schematic diagram illustrating a structure of a detection line in a display panel according to embodiment 5 of the present invention;
fig. 9 is a schematic structural diagram illustrating a detection line in a display panel according to embodiment 6 of the present invention.
Description of the main element symbols:
100-a detection unit; 110-a terminal; 120-detection line; 121 — a first line segment; 122-a second line segment; 123-a first detection section; 124-second detection section; 130-connecting lines; 200-a panel body; 210-a display area; 220-non-display area; 221-a first bezel; 222-a second bezel; 223-a third border; 300-chip on film.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention.
It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. In contrast, when an element is referred to as being "directly on" another element, there are no intervening elements present. The terms "vertical," "horizontal," "left," "right," and the like as used herein are for illustrative purposes only.
In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used in the description of the templates herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the utility model. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.
Example 1
Referring to fig. 1, the present embodiment provides a crack detection circuit structure for detecting whether cracks exist in a non-display area 220 of a display panel. The crack detection line structure includes a plurality of detection units 100, and each detection unit 100 is composed of two connection terminals 110 and one detection line 120.
The connection terminal 110 and the detection line 120 are made of a conductive material, such as copper, tin, graphite, etc., and the two connection terminals 110 are connected to both ends of the detection line 120, respectively.
The sensing line 120 includes a plurality of first line segments 121 and a plurality of second line segments 122, and the difference in the number of the first line segments 121 and the second line segments 122 is not greater than 1. Each of the first line segments 121 is disposed along a first direction, each of the second line segments 122 is disposed along a second direction, and the first line segments 121 and the second line segments 122 are alternately connected.
The first line segments 121 and the second line segments 122 are uniformly distributed in the non-display area 220 of the display panel while forming the sensing lines 120 in series to capture cracks on the non-display area 220 as much as possible.
Further, the denser the distribution of the first line segment 121 and the second line segment 122 on the non-display area 220 is, the less likely the crack is to completely avoid the first line segment 121 and the second line segment 122, the more easily the crack is captured by the detection line 120, and the higher the reliability of the detection result is. However, due to the limitation of the processing technology, the distances between the first segment 121 and between the second segment 122 and the second segment 122 cannot be reduced without limitation, otherwise, short circuit is likely to occur, and the reliability of the detection result is reduced.
Thus, in another embodiment of the present application, each first line segment 121 and each second line segment 122 lie in at least two planes. In addition, the sensing line 120 further includes a plurality of third line segments, and the first line segment 121 and the second line segment 122 located in different planes are connected through the third line segments.
Example 2
Referring to fig. 2 to 5, the present embodiment provides a display panel, which includes a panel body 200 and the crack detection circuit structure.
Specifically, the panel body 200 is in a rectangular parallelepiped shape, and the panel body 200 is composed of a display region 210 and a non-display region 220. The display region 210 is located in the middle of the panel body 200, and the non-display region 220 is composed of a first frame 221, a second frame 222, and two third frames 223.
The first frame 221 and the second frame 222 are respectively located at two ends of the display region 210 along the length direction of the panel body 200, and the two third frames 223 are respectively located at two ends of the display region 210 along the width direction of the panel body 200. In addition, a flip chip 300 is disposed on the first frame 221.
Specifically, the plurality of detection units 100 in the crack detection line structure are located on the non-display area 220, and the corresponding detection lines 120 are arranged along the circumferential direction of the display panel.
The inspector makes the two connection terminals 110 of the inspection unit 100 contact with the cathode and the anode of the external circuit, respectively, and if a crack occurs on the non-display area 220 and the crack passes through the inspection line 120, causing the breakage of the inspection line 120, the circuit where the inspection line 120 is located cannot be conducted. According to the on-off condition of the circuit, the detection personnel judge whether the detection line 120 is broken or not, and further judge whether cracks exist in the area where the detection line 120 is distributed or not.
In the present embodiment, the number of the detection units 100 is three, and the corresponding three detection lines 120 are respectively located on the second frame 222 and the two third frames 223. The inspector can directly determine whether there is a crack on the second frame 222 according to whether the inspection line 120 on the second frame 222 is broken. Similarly, the inspector can directly determine whether or not the crack is present on the third frame 223, based on whether or not the detection line 120 on the third frame 223 is broken.
Further, in the present embodiment, the connection terminals 110 of the three detection units 100 are all located on the first frame 221, the detection lines 120 located on the second frame 222 are connected to the connection terminals 110 through the connection lines 130, and the connection lines 130 pass through the third frame 223.
After the connection terminals 110 are collectively disposed on the first frame 221, the inspector can conveniently control the connection terminals 110 to contact with the cathode and the anode of the external circuit. For example, if the inspector uses the same external circuit to individually inspect the on/off states of the inspection lines 120, the cathode and the anode of the external circuit only need to be moved within a small range. If the inspector uses a plurality of external circuits to simultaneously inspect the on/off state of each inspection line 120, the cathodes and the anodes of the external circuits may be collectively disposed on a small-sized fixing bracket corresponding to the first frame 221.
Specifically, the detection circuit of the detection line 120 located at the left third frame 223 extends from one end close to the first frame 221 toward the other end close to the second frame 222, and turns back to one end close to the first frame 221. The detection circuit is located within the left third bounding box 223 for detecting a crack condition in the left third bounding box 223.
The detection circuit of the detection line 120 located in the right third frame 223 extends from one end close to the first frame 221 toward the other end close to the second frame 222, and is folded back to one end close to the first frame 221. The detection circuit is located within the right third box 223 for detecting a crack condition in the right third box 223.
The detection circuit of the detection lines located in the second frame 222 extends from one end close to the first frame 221, passes through the third frame 223 on the right side, the second frame 222, and the third frame 223 on the left side, and then ends at the other end close to the first frame 221. The detection circuit simultaneously crosses the two third frames 223 and the second frame 222 for detecting the crack condition of the second frame 222. The detection loops are adjacent to and spaced apart from the detection loops of the other detection line 120 within the third box 223.
In another embodiment of the present application, more detection lines 120 may be disposed on the second frame 222 and/or the third frame 223. In the case where the detection line 120 is broken due to a crack occurring in the second frame 222 and/or the third frame 223, the detection person can further narrow the range of the position where the crack is located.
Specifically, the non-display area 220 is provided with a GOA routing area, an EOA routing area, and a VSS routing area, and the detection line 120 covers at least one of the GOA routing area, the EOA routing area, and the VSS routing area, and can detect whether a crack exists in at least one of the GOA routing area, the EOA routing area, and the VSS routing area.
In the embodiment, the detection lines 120 cover both the GOA routing area, the EOA routing area, and the VSS routing area, and the edge of the non-display area 220, and detect whether there is a crack at the edge of the display panel and the routing area at the periphery of the display panel.
Further, only when a crack possibly existing on the non-display area 220 passes through the detection line 120 and the detection line 120 is broken, the inspector can determine whether the crack exists according to the on-off condition of the circuit where the detection line 120 is located. Therefore, the probability of the crack passing through the inspection line 120 is increased, the crack capturing capability of the inspection line 120 is improved, and the accuracy of the inspection result can be improved.
In the present embodiment, the detection lines 120 extend in the third direction as a whole, and are folded back and forth in the second direction. The third direction is parallel to the first direction and is the circumferential direction of the non-display area 220, and the second direction is perpendicular to the third direction.
Taking the third frame 223 as an example, the first direction and the third direction are the length direction of the display panel, the second direction is the width direction of the display panel, and the detection lines 120 extend in an S-shape on the third frame 223.
The length of the second line segment 122 is slightly smaller than the width of the third border 223, and spans the edges of the GOA routing area, the EOA routing area, the VSS routing area, and the non-display area 220. The length of the first line segment 121 is smaller than that of the second line segment 122, and the length of the first line segment 121 is the distance between two adjacent second line segments 122 along the first direction.
The smaller the length of the first line segment 121, the shorter the distance between two adjacent second line segments 122, the denser the distribution of the second line segments 122, and the more easily cracks are captured.
Due to the limitation of the processing technology, the distance between two adjacent second segments 122 cannot be reduced without limitation, otherwise, a short circuit is easily caused, and the reliability of the detection result is reduced. At this time, two adjacent second line segments 122 that are too close to each other may be disposed on the upper surface and the lower surface of the display panel, respectively, and then a third line segment may be formed by punching holes and injecting tin, etc., so as to connect the first line segment 121 and the second line segment 122 that are not on the same plane.
In summary, the first line segments 121 and the second line segments 122 are alternately arranged on the non-display area 220, and when a crack occurs in the non-display area 220, the first line segments 121 and/or the second line segments 122 passing through the crack are broken. The detection personnel respectively connect the wiring terminals 110 at the two ends of the detection line 120 with the cathode and the anode of the external circuit, then judge whether the detection line 120 is broken according to the on-off condition of the circuit, further judge whether cracks exist on the non-display area 220, and quickly locate the positions of the cracks according to the distribution area of the detection line 120.
Example 3
Referring to fig. 6, the difference from embodiment 2 is that in this embodiment, the second direction obliquely intersects with the first direction.
At this time, the length of the second line segments 122 increases, the vertical distance between two adjacent second line segments 122 decreases, the detection lines 120 are more densely distributed, and cracks can be captured more effectively.
Example 4
Referring to fig. 7, the difference from embodiment 2 is that in this embodiment, the detection line 120 is composed of a plurality of first detection nodes 123, and the first detection nodes 123 are arranged along the third direction and connected in series. Each of the first detecting sections 123 includes a plurality of first line segments 121 and a plurality of second line segments 122, and the first detecting section 123 extends in the second direction as a whole.
The third direction is parallel to the first direction and is the circumferential direction of the non-display area 220, and the second direction is perpendicular to the third direction.
Taking the third frame 223 as an example, each of the first detection nodes 123 is arranged along the length direction of the third frame 223. Within a single first detection segment 123, the length of the first line segment 121 is greater than the length of the second line segment 122. Seven first line segments 121 are arranged along the second direction and connected by a second line segment 122.
Example 5
Referring to fig. 8, the difference from embodiment 4 is that in the present embodiment, the third direction is the circumferential direction of the non-display area 220, and the first direction and the third direction are obliquely intersected.
At this time, the length of the first line segment 121 increases, the vertical distance between two adjacent first line segments 121 decreases, the detection lines 120 are more densely distributed, and cracks can be captured more effectively.
Example 6
Referring to fig. 9, the difference from embodiment 2 is that in this embodiment, the sensing line 120 is composed of a plurality of second sensing segments 124, the second sensing segments 124 are arranged along the third direction and are connected in series, and each second sensing segment 124 includes a first line segment 121 and a second line segment 122.
Wherein the third direction is a circumferential direction of the non-display area 220, and the first direction and the second direction are obliquely intersected with the third direction.
In particular, in the present embodiment, an angle between the first direction and the third direction is equal to an angle between the second direction and the third direction.
In all examples shown and described herein, any particular value should be construed as merely exemplary, and not as a limitation, and thus other examples of example embodiments may have different values.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.
The above examples are merely illustrative of several embodiments of the present invention, and the description thereof is more specific and detailed, but not to be construed as limiting the scope of the utility model. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention.
Claims (10)
1. A crack detection circuit structure is characterized by being applied to a display panel and comprising a plurality of detection units;
the detection unit comprises connecting terminals and detection lines, the connecting terminals are arranged in pairs, and two ends of the detection lines are respectively connected with the two connecting terminals;
the detection line comprises a plurality of first line segments and a plurality of second line segments, the first line segments are arranged along a first direction, the second line segments are arranged along a second direction, and the first line segments and the second line segments are alternately connected.
2. The crack detection line structure of claim 1, wherein each of the first and second line segments lie in at least two planes, the detection line further comprising a plurality of third line segments, the first and second line segments lying in different planes being connected by the third line segments.
3. A display panel comprising the crack detection line structure as claimed in claim 1 or 2 and a panel body including a display region and a non-display region, the non-display region being disposed around the display region, a plurality of the detection lines each being located on the non-display region and arranged in a circumferential direction of the non-display region.
4. The display panel according to claim 3, wherein a GOA routing area, an EOA routing area and a VSS routing area are provided on the non-display area, and the detection lines cover at least one of the GOA routing area, the EOA routing area and the VSS routing area.
5. The display panel according to claim 3, wherein the detection lines extend in a third direction as a whole, are folded back and forth in the second direction, and the third direction is parallel to the first direction.
6. The display panel according to claim 3, wherein the detecting lines include a plurality of first detecting sections, each of the first detecting sections includes a plurality of the first line segments and a plurality of the second line segments, the first detecting sections are arranged in a third direction and connected in series, and the first detecting sections extend in the second direction as a whole.
7. The display panel according to claim 3, wherein the detecting line comprises a plurality of second detecting segments, each of the second detecting segments comprises one of the first line segments and one of the second line segments, each of the second detecting segments is arranged in a third direction and connected in series, and each of the first direction and the second direction obliquely intersects with the third direction.
8. The display panel according to any one of claims 5 to 7, wherein the third direction is a circumferential direction of the non-display region.
9. The display panel according to claim 3, wherein the panel body is rectangular, and a flip chip film is disposed at one end of the panel body along a length direction;
the non-display area comprises a first frame where the chip on film is located, a second frame opposite to the chip on film and two third frames adjacent to the chip on film;
the detection lines of the three detection units are respectively positioned on the second frame and the two third frames.
10. The display panel according to claim 9, wherein the connection terminals are located on the first frame, connection lines are disposed between the detection lines on the second frame and the corresponding connection terminals, and the connection lines pass through the third frame.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120768561.1U CN215339612U (en) | 2021-04-14 | 2021-04-14 | Crack detection line structure and display panel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120768561.1U CN215339612U (en) | 2021-04-14 | 2021-04-14 | Crack detection line structure and display panel |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215339612U true CN215339612U (en) | 2021-12-28 |
Family
ID=79594048
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120768561.1U Expired - Fee Related CN215339612U (en) | 2021-04-14 | 2021-04-14 | Crack detection line structure and display panel |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215339612U (en) |
-
2021
- 2021-04-14 CN CN202120768561.1U patent/CN215339612U/en not_active Expired - Fee Related
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| EP3361838B1 (en) | Chip-on-film package, display panel, and display device | |
| US10824261B1 (en) | Display module, detecting method for display module, and display device | |
| JP6188953B2 (en) | Liquid crystal display, liquid crystal display test method, and electronic apparatus | |
| US10146385B2 (en) | Touch substrate, display device and method for detecting touch electrode pattern | |
| CN105372857A (en) | Glass substrate, liquid crystal display panel and liquid crystal display device | |
| CN112289778B (en) | Display substrate, display device and detection method for display substrate | |
| CN108490654A (en) | A kind of array substrate, array substrate motherboard and display device | |
| CN114255683A (en) | Display panel | |
| CN111309173B (en) | Touch electrode, touch display panel and touch display device | |
| CN215339612U (en) | Crack detection line structure and display panel | |
| JP2006276115A (en) | Liquid crystal module | |
| CN109856843B (en) | Display panel motherboard, display panel and detection method thereof | |
| US20140062501A1 (en) | Electrical connection assembly and testing method thereof | |
| CN115372793A (en) | Circuit detection method for integrated circuit | |
| US7049527B1 (en) | Conductor-pattern testing method, and electro-optical device | |
| KR100796172B1 (en) | Non-contact type single side probe construction | |
| KR101342171B1 (en) | Substrate inspection apparatus and substrate inspection method | |
| CN211957065U (en) | Display panel edge detection circuit, display panel and display device | |
| CN213186352U (en) | Testing device | |
| JPH0750138B2 (en) | Defect inspection method for transparent conductive circuit board | |
| CN110161090B (en) | Chip on multilayer film, method for detecting bonding state of chip and display device | |
| CN107544164B (en) | Electric logging board for detecting multi-metal pins based on additional pin driving alarm | |
| JPH0219839A (en) | Active matrix substrate | |
| JP3846240B2 (en) | Liquid crystal panel inspection apparatus and liquid crystal panel inspection method | |
| CN113516934A (en) | Screen body, circuit board and display device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20211228 |