CN107910352B - Organic light-emitting display panel and display device - Google Patents
Organic light-emitting display panel and display device Download PDFInfo
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K59/00—Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
- H10K59/10—OLED displays
- H10K59/12—Active-matrix OLED [AMOLED] displays
- H10K59/131—Interconnections, e.g. wiring lines or terminals
- H10K59/1315—Interconnections, e.g. wiring lines or terminals comprising structures specially adapted for lowering the resistance
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Abstract
The invention discloses an organic light-emitting display panel and a display device.A power supply wire is arranged to extend along the row direction, a compensation power supply wire which is arranged to be crossed with the power supply wire is arranged, and a through hole is arranged at the part of the cross position of the power supply wire and the compensation power supply wire, so that the corresponding power supply wire and the compensation power supply wire are electrically connected through the through hole, the electrically connected power supply wire and the compensation power supply wire are connected in parallel, namely, the power supply wire and the compensation power supply wire are equivalently connected with a resistor in parallel, and the resistance of the power supply wire can be reduced. The number of the via holes corresponding to the power supply wires with longer lengths is larger, so that the resistors connected in parallel with the power supply wires with longer lengths are larger, the resistors of the power supply wires with different lengths can be the same within an error allowable range, the IR Drop of the power supply wires with different lengths is the same within the error allowable range, and the display uniformity is improved.
Description
Technical Field
The present invention relates to the field of display technologies, and in particular, to an organic light emitting display panel and a display device.
Background
Organic Light-Emitting diodes (OLEDs) are one of the hot spots in the field of flat panel display research today. With the development of display technology, the screen of flat panel display gradually develops to the full screen, and compared with the common display screen, the full screen has a larger screen occupation ratio and an ultra-narrow frame, and the visual effect of a viewer can be greatly improved, so that the full screen receives wide attention. In order to realize full-screen display, as shown in the schematic structural diagram of the organic light emitting display panel shown in fig. 1, a middle area 1 is generally disposed in a display area of the organic light emitting display panel, so that a front camera 11, a headphone 12, and the like are disposed in the middle area 1. However, due to the arrangement of the middle area 1, the number of pixels in one column in the display area adjacently arranged to the middle area 1 in the column direction is less than the number of pixels in one column in the rest display areas, so that the length of the PVDD power trace corresponding to one column in the display area adjacently arranged to the middle area 1 in the column direction is different from that in the rest display areas. Due to the fact that IR Drop (voltage Drop) exists in the PVDD power traces, differences exist between PVDD high voltage signals of one row of PVDD power traces in the display area, which is adjacently arranged in the row direction, of the middle area 1 and PVDD high voltage signals of PVDD power traces in the rest display areas, and therefore display unevenness is caused.
Disclosure of Invention
The embodiment of the invention provides an organic light-emitting display panel and a display device, which are used for improving the display uniformity of the organic light-emitting display panel.
An embodiment of the present invention provides an organic light emitting display panel, including: the power supply device comprises a plurality of power supply wires extending along the row direction, a plurality of compensation power supply wires arranged in a crossed manner with the power supply wires, and via holes positioned at the part crossed positions of the power supply wires and the compensation power supply wires; the power supply wire is electrically connected with the corresponding compensation power supply wire through the via hole;
the organic light emitting display panel is divided into a first area and a second area; the length of the power supply wire in the first area is smaller than that of the power supply wire in the second area; and the longer the length of the power supply wire, the more the number of the via holes corresponding to the power supply wire is.
Correspondingly, the embodiment of the invention also provides a display device which comprises the organic light-emitting display panel provided by the embodiment of the invention.
The invention has the following beneficial effects:
according to the organic light-emitting display panel and the display device provided by the embodiment of the invention, the power supply wires are arranged to extend along the row direction, the compensation power supply wires are arranged to be crossed with the power supply wires, and the through holes are arranged at the part of the crossed positions of the power supply wires and the compensation power supply wires, so that the corresponding power supply wires and the compensation power supply wires are electrically connected through the through holes, the electrically connected power supply wires and the compensation power supply wires are connected in parallel, namely, the power supply wires are equivalently connected with a resistor in parallel, and the resistance of the power supply wires can be reduced. The number of the via holes corresponding to the power supply wires with longer lengths is larger, so that the resistors connected in parallel with the power supply wires with longer lengths are larger, the resistors of the power supply wires with different lengths can be the same within an error allowable range, the IR Drop of the power supply wires with different lengths is the same within the error allowable range, and the display uniformity is improved.
Drawings
Fig. 1 is a schematic structural diagram of an organic light emitting display panel in the prior art;
fig. 2 is a schematic structural diagram of an organic light emitting display panel according to an embodiment of the present invention;
fig. 3 is a schematic cross-sectional structure along the AA' direction in the organic light emitting display panel shown in fig. 2;
fig. 4a is a schematic partial structure diagram of an organic light emitting display panel according to an embodiment of the present invention;
fig. 4b is a second schematic view illustrating a partial structure of an organic light emitting display panel according to an embodiment of the invention;
fig. 4c is a third schematic view of a partial structure of an organic light emitting display panel according to an embodiment of the invention;
fig. 5 is a schematic structural diagram of a display device according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention clearer, specific embodiments of an organic light emitting display panel and a display device according to embodiments of the present invention are described in detail below with reference to the accompanying drawings. It should be understood that the preferred embodiments described below are only for illustrating and explaining the present invention and are not to be used for limiting the present invention. And the embodiments and features of the embodiments in the present application may be combined with each other without conflict.
The thickness, size and shape of each layer of film in the drawings do not reflect the real proportion of the organic light emitting display panel, and the purpose is only to schematically illustrate the content of the invention.
As shown in fig. 2, an organic light emitting display panel provided in an embodiment of the present invention includes: a plurality of power traces 100 extending in the row direction, a plurality of compensation power traces 200 crossing the power traces 100, and vias 300 at the intersections of the power traces 100 and the compensation power traces 200; the power trace 100 is electrically connected to the corresponding compensation power trace 200 through the via 300. Also, the organic light emitting display panel may be divided into a first region a1 and a second region a 2; wherein the length of the power trace 100 in the first area a1 is less than the length of the power trace 100 in the second area a 2; and the longer the length of the power supply wire, the more the number of the via holes corresponding to the power supply wire is.
In the organic light emitting display panel provided by the embodiment of the invention, the power supply wires are arranged to extend along the row direction, the compensation power supply wires are arranged to be crossed with the power supply wires, and the through holes are arranged at the part of the crossed positions of the power supply wires and the compensation power supply wires, so that the corresponding power supply wires and the compensation power supply wires are electrically connected through the through holes, the electrically connected power supply wires and the compensation power supply wires are connected in parallel, namely, the power supply wires are connected with one resistor in parallel, and the resistance of the power supply wires can be reduced. The number of the via holes corresponding to the power supply wires with longer lengths is larger, so that the resistors connected in parallel with the power supply wires with longer lengths are larger, the resistors of the power supply wires with different lengths can be the same within an error allowable range, the IR Drop of the power supply wires with different lengths is the same within the error allowable range, and the display uniformity is improved.
The organic light emitting display panel generally uses a substrate to dispose pixels and power traces. In a specific implementation, the organic light emitting display panel provided in the embodiment of the invention further includes a substrate on which the pixels and the power traces are disposed. The substrate may be a glass substrate, a flexible substrate, a silicon substrate, or the like, and is not limited thereto. When the organic light emitting display panel is applied to a display device, a camera, a headphone, and the like are generally disposed, so in order to dispose the camera, the headphone, and the like, in a specific implementation, in the organic light emitting display panel provided in an embodiment of the present invention, as shown in fig. 2, the first region a1 may include a middle region a11, and a first sub-region a12 and a second sub-region a13 which are separated by the middle region a 11. The middle area a11 may be a hollowed-out area of a substrate in an organic light emitting display panel. In an actual manufacturing process, the middle area a11 is a hollowed-out area by cutting off the middle area a11 of the substrate, so that a camera, an earphone and the like can be arranged in the display device. Of course, the middle area a11 may not be cut, but be used as a protective cover for a camera, an earpiece, and the like, in which case, the middle area a11 may be configured as a non-hollow area. In addition, in order to make these devices work normally, the non-hollow-out area can also be set as a transparent display area or a non-display area. Of course, the specific arrangement of the middle region of the organic light emitting display panel needs to be set according to the practical application environment of the organic light emitting display panel, and is not limited herein.
Since the organic light emitting display panel is provided with the middle area a11, the same row of power traces can be directly disconnected, so that the length of the power traces in the first area a1 is smaller than that of the power traces in the second area a2, which results in that the resistance of the power traces in the first area a1 is smaller than that of the power traces in the second area a2, and therefore the influence of the IR Drop of the power traces in the first area a1 may be smaller than that of the power traces in the second area a 2. In order to make the IR Drop of the power traces in the two areas the same within the tolerance range, the number of vias 300 corresponding to each power trace 100 in the first area a1 may be smaller than the number of vias 300 corresponding to each power trace 100 in the second area a2, so that the resistances of the power traces in the two areas may be the same within the tolerance range, and thus the IR Drop of the power traces in the two areas is the same within the tolerance range. In fig. 2, although the number of vias 300 corresponding to part of the power traces 100 in the second area a2 is shown to be smaller than the number of vias 300 corresponding to part of the power traces 100 in the first area a1, this is merely to illustrate the arrangement of the vias, and does not represent the number of vias corresponding to each row of the power traces 100 in actual arrangement. In specific implementation, the number of the via holes corresponding to each row of power supply wires can be calculated and determined through simulation, so that the resistances of different power supply wires and corresponding power supply compensation wires connected in parallel can be the same within an error allowable range.
In practical implementation, in the organic light emitting display panel provided by the embodiment of the present invention, a plurality of pixels are generally disposed, and as shown in fig. 4a to 4c, each pixel PX may include an organic light emitting diode 600 and a pixel driving circuit electrically connected to each organic light emitting diode. A general pixel driving circuit includes a plurality of transistors 700 and a storage capacitor, and by connecting the transistors and the storage capacitor to each other, a data voltage signal and a high level signal PVDD are applied to drive the organic light emitting diode to emit light, thereby implementing a display function. In a specific implementation, in order to drive the organic light emitting diode to emit light, the organic light emitting display panel is generally further bound with a driving chip electrically connected to the power trace, so as to input a voltage signal to the pixel driving circuit through the power trace.
In specific implementation, as shown in fig. 2, the organic light emitting display panel provided in the embodiment of the present invention further includes: and a driving chip IC bonded on the organic light emitting display panel and positioned at a side of the second region a2 away from the first region a 1. In the first area a1, the number of the vias 300 corresponding to each row of power traces 100 gradually increases from one side of the first area a1 close to the second area a2 to the other side of the first area a1 away from the second area a 2. In the second area a2, the number of vias corresponding to each row of power traces 100 gradually increases from one side of the second area a2, which is far away from the first area a1, to the other side of the second area a2, which is close to the first area a 1.
Specifically, as shown in fig. 2, the organic light emitting display panel may further include a connection trace 400; the driving chip IC is electrically connected to each power trace 100 through a connection trace 400. This allows the driver chip IC to be electrically connected to each row of power traces 100 through the connection traces 400 to input signals to each row of power traces 100, so that voltage signals can be inputted laterally. In addition, in the embodiment of the invention, the IR Drop of each power trace 100 is the same within the error allowable range, so that the uniformity of the voltage signal inputted transversely can be improved, and the display uniformity can be improved. Since each power trace 100 extends along the row direction, the power trace 100 in the second area a2 is closer to the driver IC, and the power trace 100 in the first area a1 is farther from the driver IC. In the second region a2, the distance between the power traces 100 and the driver chip IC is gradually increased from the side far from the first region a1 to the side near the first region a1, so that the IR Drop of the power trace 100 near the driver chip IC is smaller than the IR Drop of the power trace 100 far from the driver chip IC, and thus the number of vias corresponding to each row of power traces 100 in the second region a2 is gradually increased from the side far from the first region a1 of the second region a2 to the other side near the first region a1 of the second region a2, so that the resistance of the power trace 100 in the second region a2 is the same in the error tolerance range, and the IR Drop is the same in the error tolerance range. For the first region a1, in a direction from the side close to the second region a2 to the side far from the first region a2, the power traces 100 are gradually farther from the driver chip IC, so that the IR Drop of the power trace 100 closer to the driver chip IC is smaller than the IR Drop of the power trace 100 farther from the driver chip IC, and thus the number of the vias 300 corresponding to each row of power traces 100 in the first region a1 is gradually increased from the side close to the second region a2 of the first region a1 to the other side far from the second region a2 of the first region a1, so that the resistance of the power trace 100 in the first region a1 is the same in the error tolerance range, and the IR Drop is the same in the error tolerance range. Furthermore, by setting the number of the vias 300 corresponding to each power trace 100 in the first area a1 and the second area a2, the resistances of the power traces 100 in the two areas are the same within the error tolerance, so that the IR Drop is the same within the error tolerance.
In specific implementation, in the organic light emitting display panel provided in the embodiment of the invention, as shown in fig. 2, the center distances between every two adjacent vias 300 corresponding to the same power trace 100 may be the same. This can make the resistance of one power trace 100 connected in parallel uniform, so that the resistance of each position on the power trace 100 can be more uniform, thereby further improving the influence caused by IR Drop.
In a specific implementation, in the organic light emitting display panel provided in the embodiment of the invention, as shown in fig. 2 and fig. 3, the power traces 100 and the compensation power traces 200 are perpendicular and arranged in different layers. Specifically, a first insulating layer 500 is further disposed between the power trace 100 and the compensation power trace 200. The compensation power trace 200 may be located on a side of the first insulating layer 500 away from the substrate 10, and the compensation power trace 200 is electrically connected to the corresponding power trace 100 through the via 300 penetrating through the first insulating layer 500. Or alternatively. The power trace may also be located on a side of the first insulating layer away from the substrate, and the power trace is electrically connected to the corresponding compensation power trace through a via hole penetrating through the first insulating layer, which is not limited herein.
In a specific implementation, in the organic light emitting display panel provided in the embodiment of the present invention, as shown in fig. 4a to 4c, the organic light emitting display panel may further include: an anode layer 610, a cathode layer 620, and a light emitting layer 630 between the anode layer 610 and the cathode layer 620; among them, the material of the light emitting layer 630 may include an organic electroluminescent material to form the organic light emitting diode 600. The organic light emitting display panel further includes a transistor 700, and the transistor 700 may include: the semiconductor device includes a gate electrode 710, an active layer 720 insulated from the gate electrode 710, and a source electrode 731 and a drain electrode 732 insulated from the gate electrode 710 and electrically connected to the active layer 720. In addition, a capacitance metal layer 800 insulated from both the source 731 and the drain 732 is further disposed between the layer where the source 731 and the drain 732 of the transistor 700 are located and the layer where the gate 710 is located, and in general, in practical applications, it is required that an orthogonal projection of the capacitance metal layer 800 on the substrate 10 and an orthogonal projection of the gate on the substrate have at least a partial overlapping region, and an interlayer dielectric layer is further disposed between the capacitance metal layer 800 and the gate so that the overlapping region forms a storage capacitor. The capacitor metal layer 800 may serve as a first electrode of the storage capacitor, and the gate in the overlap region may serve as a second electrode of the storage capacitor. Of course, the specific structure of the storage capacitor may also be implemented in other ways, and is not limited herein.
In addition, in an implementation, the organic light emitting display panel further includes a gate line to input a scan signal to the pixel driving circuit. And the gate line and the gate electrode 710 of the transistor are generally arranged in the same material in the same layer. Of course, in order to input a data signal to the pixel driving circuit, the organic light emitting display panel may further include a data line to input the data signal to the pixel driving circuit. And the data line is generally disposed in the same material as the source 731 and the drain 732 of the transistor. Further, in order to achieve insulation, a gate insulating layer is disposed between the gate electrode 710 and the active layer 720, a first interlayer insulating layer is disposed between the capacitor metal layer 800 and the source and drain electrodes 731 and 732, and a second interlayer insulating layer is disposed between the source and drain electrodes 731 and 732 and the anode layer 610.
In a specific implementation, in the organic light emitting display panel provided in the embodiment of the present invention, each power trace may be made of the same material as the gate line at the same layer and be insulated from the gate line. Therefore, the patterns of the power supply wiring 100 and the grid line can be formed simultaneously by adopting a one-step composition process, the preparation process flow can be simplified, the production cost is saved, and the production efficiency is improved. Specifically, as shown in fig. 4a to 4c, each of the power traces 100 and the gate 710 of the transistor are made of the same material and are insulated.
In a specific implementation, in the organic light emitting display panel provided in the embodiment of the invention, as shown in fig. 4a, each of the compensation power traces 200 may be made of the same material and insulated from the anode layer 610. Thus, the patterns of the compensation power supply wire 200 and the anode layer 610 can be formed simultaneously by adopting a one-step composition process, the preparation process flow can be simplified, the production cost can be saved, and the production efficiency can be improved. In addition, the compensation power trace 200 is electrically connected to the corresponding power trace 100 through a via 300 penetrating through the interlayer dielectric layer, the first interlayer insulating layer, and the second interlayer insulating layer, that is, the interlayer dielectric layer, the first interlayer insulating layer, and the second interlayer insulating layer may serve as the first insulating layer.
In specific implementation, in the organic light emitting display panel provided by the embodiment of the present invention, as shown in fig. 4b, the organic light emitting display panel further includes a capacitor metal layer 800 for forming one electrode of a storage capacitor; the compensation power traces 200 and the capacitor metal layer 800 are made of the same material and are insulated from each other. Thus, the patterns of the compensation power supply wire 200 and the capacitance metal layer 800 can be formed simultaneously by adopting a one-step composition process, the preparation process flow can be simplified, the production cost can be saved, and the production efficiency can be improved. Moreover, the compensation power trace 200 is electrically connected to the corresponding power trace 100 through the via 300 penetrating through the interlayer dielectric layer, i.e., the interlayer dielectric layer can serve as a first insulating layer. And the material of the common capacitor metal layer 800 is a metal material, so that when the compensation power traces 200 and the capacitor metal layer 800 are made of the same material in the same layer and are arranged in an insulated manner, the resistance of the compensation power traces 200 can be minimized, and further the resistance of the power traces 100 connected in parallel can be minimized.
In a specific implementation, in the organic light emitting display panel provided in the embodiment of the present invention, the compensation power traces and the data lines are disposed in the same layer and in the same material and are insulated from each other. Specifically, the common data line and the source 731 and the drain 732 of the transistor 700 are disposed in the same layer and the same material, as shown in fig. 4c, and each of the compensating power traces 200 is disposed in the same layer and the same material and insulated from the source 731 and the drain 732 of the transistor 700. Thus, the patterns of the compensation power trace 200, the source 731 and the drain 732 of the transistor 700, and the data line can be simultaneously formed by one-time composition process, so that the preparation process flow can be simplified, the production cost can be saved, and the production efficiency can be improved. Moreover, the compensation power trace 200 is electrically connected to the corresponding power trace 100 through a via 300 penetrating through the interlayer dielectric layer and the first interlayer insulating layer, i.e., the interlayer dielectric layer and the first interlayer insulating layer can be used as the first insulating layer.
In a specific implementation, in the organic light emitting display panel provided in the embodiment of the present invention, the material of the compensation power trace may be a metal material, and for example, may include: one or a combination of molybdenum, aluminum, gold, and silver, but not limited thereto.
Based on the same inventive concept, the embodiment of the invention further provides a display device, which comprises the organic light emitting display panel provided by the embodiment of the invention. The principle of the display device to solve the problem is similar to that of the organic light emitting display panel, so the implementation of the display device can be referred to the implementation of the organic light emitting display panel, and repeated details are not repeated herein.
In specific implementation, the display device provided by the embodiment of the invention can be a full-screen mobile phone shown in fig. 5. In the mobile phone shown in fig. 5, the organic light emitting display panel has a middle region a11, and one or a combination of a camera, a receiver, a light sensor, a distance sensor, an iris recognition sensor, and a fingerprint recognition sensor may be disposed in the middle region a 11.
Of course, the display device provided in the embodiment of the present invention may also be: any product or component with a display function, such as a tablet computer, a television, a display, a notebook computer, a digital photo frame, a navigator and the like. Other essential components of the display device are understood by those skilled in the art, and are not described herein or should not be construed as limiting the invention.
According to the organic light-emitting display panel and the display device provided by the embodiment of the invention, the power supply wires are arranged to extend along the row direction, the compensation power supply wires are arranged to be crossed with the power supply wires, and the through holes are arranged at the part of the crossed positions of the power supply wires and the compensation power supply wires, so that the corresponding power supply wires and the compensation power supply wires are electrically connected through the through holes, the electrically connected power supply wires and the compensation power supply wires are connected in parallel, namely, the power supply wires are equivalently connected with a resistor in parallel, and the resistance of the power supply wires can be reduced. The number of the via holes corresponding to the power supply wires with longer lengths is larger, so that the resistors connected in parallel with the power supply wires with longer lengths are larger, the resistors of the power supply wires with different lengths can be the same within an error allowable range, the IR Drop of the power supply wires with different lengths is the same within the error allowable range, and the display uniformity is improved.
It will be apparent to those skilled in the art that various changes and modifications may be made in the present invention without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.
Claims (10)
1. An organic light emitting display panel is characterized in that the organic light emitting display panel is divided into a first area and a second area; the organic light emitting display panel includes: the power supply device comprises a plurality of power supply wires extending along the row direction, a plurality of compensation power supply wires arranged in a crossed manner with the power supply wires, and via holes positioned at the part crossed positions of the power supply wires and the compensation power supply wires; the power supply wire is electrically connected with the corresponding compensation power supply wire through the via hole, and the driving chip is bound on the organic light-emitting display panel and is positioned on one side of the second area, which is far away from the first area;
the length of the power supply wire in the first area is smaller than that of the power supply wire in the second area; the longer the length of the power supply wire is, the more the number of the via holes corresponding to the power supply wire is;
in the first area, the number of the via holes corresponding to each row of the power supply routing lines is gradually increased from one side of the first area close to the second area to the other side of the first area far away from the second area;
in the second area, the number of the via holes corresponding to each row of the power traces is gradually increased from one side of the second area far away from the first area to the other side of the second area close to the first area.
2. The organic light emitting display panel of claim 1, further comprising connection traces; the driving chip is electrically connected with each power supply wire through the connecting wire.
3. The organic light-emitting display panel of claim 1, wherein the center distances between every two adjacent vias corresponding to the same power trace are the same.
4. The organic light-emitting display panel according to any one of claims 1 to 3, wherein the power traces are perpendicular to the compensation power traces and are arranged in different layers.
5. The organic light emitting display panel according to claim 4, further comprising: an anode layer, a cathode layer, and a light emitting layer between the anode layer and the cathode layer; wherein,
and the compensation power supply wires and the anode layer are made of the same material and arranged in an insulating way.
6. The organic light emitting display panel according to claim 4, further comprising a data line:
and the compensation power supply wires and the data wires are made of the same material and are arranged in an insulating way on the same layer.
7. The organic light emitting display panel according to claim 4, further comprising: a capacitor metal layer for forming one electrode of the storage capacitor;
and the compensation power supply wires and the capacitance metal layer are made of the same material and are insulated from each other.
8. The organic light emitting display panel of claim 6 or 7, wherein the material of the compensation power trace comprises: one or a combination of molybdenum, aluminum, gold, and silver.
9. The organic light emitting display panel according to claim 1, further comprising a gate line: and the power supply wires and the grid lines are made of the same material and arranged in an insulating way on the same layer.
10. A display device comprising the organic light-emitting display panel according to any one of claims 1 to 9.
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| CN201711159897.2A CN107910352B (en) | 2017-11-20 | 2017-11-20 | Organic light-emitting display panel and display device |
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| CN201711159897.2A CN107910352B (en) | 2017-11-20 | 2017-11-20 | Organic light-emitting display panel and display device |
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| CN107910352B true CN107910352B (en) | 2020-03-24 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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