CN112259576B - Array substrate, display panel and display device - Google Patents
Array substrate, display panel and display device Download PDFInfo
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- CN112259576B CN112259576B CN202011065077.9A CN202011065077A CN112259576B CN 112259576 B CN112259576 B CN 112259576B CN 202011065077 A CN202011065077 A CN 202011065077A CN 112259576 B CN112259576 B CN 112259576B
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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
Abstract
The invention provides an array substrate, a display panel and a display device, and relates to the technical field of display, wherein the array substrate comprises a substrate, and a pixel array circuit and a detection circuit which are arranged on the substrate; the substrate is also provided with a first signal wire which is electrically connected with the pixel array circuit; the detection circuit comprises a second signal wire, and the second signal wire is used for carrying out electrical detection on the pixel array circuit. According to the invention, the second signal wire is arranged at the outer side of the first signal wire electrically connected with the pixel array circuit, so that the distance between the first signal wire and the edge of the array substrate is increased, accordingly, when the mother board of the display panel is cut, the first signal wire can be prevented from being damaged, the normal work of the pixel array circuit electrically connected with the first signal wire is ensured, and the qualification rate of the display panel is further improved.
Description
Technical Field
The invention relates to the technical field of display, in particular to an array substrate, a display panel and a display device.
Background
An OLED (Organic Light-Emitting Diode) display panel has characteristics of self-luminescence, high contrast, thin thickness, fast response speed, wide viewing angle, low power consumption, and flexible display, and is therefore widely used in display devices, such as smart watches or smart hand rings.
The display panel generally includes an array substrate, and an organic light emitting layer and a peripheral circuit disposed on the array substrate, where the peripheral circuit includes a signal trace and a detection signal line, the signal trace and the detection signal line are both electrically connected to a pixel array circuit in the array substrate, the signal trace is used to provide a driving signal to the pixel array circuit, and the detection signal line is used to provide a detection signal to the pixel array circuit, where the pixel array circuit is used to drive normal display of the display panel, and the detection signal line is used to detect whether the pixel array circuit has a defect.
However, in the manufacturing process of the display panel, the display panel mother board with a larger size is usually manufactured first, and then the display panel mother board is cut into a plurality of single display panels by using a cutting device, so that scratches are easily generated in the cutting process, and the scratches easily damage signal routing wires electrically connected with the pixel array circuit in the peripheral circuit, thereby reducing the qualification rate of the display device.
Disclosure of Invention
In view of the foregoing problems, embodiments of the present invention provide an array substrate, a display panel and a display device, so as to avoid damage to a first signal trace in a cutting process and increase a yield of the display device.
In order to achieve the above object, the embodiments of the present invention provide the following technical solutions:
a first aspect of an embodiment of the present invention provides an array substrate, including: the pixel array circuit comprises a substrate, and a pixel array circuit and a detection circuit which are arranged on the substrate; the substrate is also provided with a first signal wire which is electrically connected with the pixel array circuit, the detection circuit comprises a second signal wire which is used for electrically detecting the pixel array circuit; the second signal wire is located on the outer side of the first signal wire, and the second signal wire is close to the edge of the substrate.
The array substrate as described above, wherein the first signal wiring includes a power supply signal line for supplying a power supply signal to the pixel array circuit.
The array substrate as described above, wherein the power signal line includes a VGH signal line for supplying a high potential signal to the pixel array circuit.
The array substrate as described above, wherein the second signal trace is disposed adjacent to the VGH signal line.
The array substrate as described above, wherein the second signal trace is used for providing a data signal to the pixel array circuit.
The array substrate as described above, wherein the second signal trace includes a plurality of signal lines and a SW switch, and the SW switch is used for controlling a switch of any one of the signal lines; the signal line is connected with the pixel array circuit and used for providing detection signals for the pixel array circuit.
The array substrate as described above, wherein the first signal trace forms a first bonding area towards the end of the substrate edge, and the second signal trace forms a second bonding area towards the end of the substrate edge; the first binding region and the second binding region are used for binding a flexible circuit board.
A second aspect of the embodiments of the present invention provides a display panel, which includes the array substrate as described above.
The display panel as described above, wherein the second signal trace is electrically connected to the VGH signal line in the first signal trace.
A third aspect of embodiments of the present invention provides a display device, including a flexible circuit board and the display panel as described above, where the flexible circuit board is configured to provide signals to a pixel array circuit in the display panel.
In the array substrate, the display panel and the display device provided by the embodiment of the invention, the first signal wire electrically connected with the pixel array circuit is arranged at the inner side of the second signal wire, that is to say, the first signal wire is arranged at the side of the second signal wire, which is far away from the edge of the substrate, so that the distance between the first signal wire and the edge of the substrate is increased, accordingly, when a mother board of the display panel is cut, the first signal wire is prevented from being damaged, the normal work of the pixel array circuit electrically connected with the first signal wire is ensured, and the qualification rate of the display panel is further improved.
In addition to the technical problems solved by the embodiments of the present invention, the technical features constituting the technical solutions, and the advantages brought by the technical features of the technical solutions described above, other technical problems that can be solved by the array substrate, the display panel, and the display device provided by the embodiments of the present invention, other technical features included in the technical solutions, and advantages brought by the technical features will be further described in detail in the detailed description.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the description of the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.
Fig. 1 is a schematic structural diagram of an array substrate according to an embodiment of the present invention;
fig. 2 is a distribution diagram of first signal traces and second signal traces according to a first embodiment of the present invention;
fig. 3 is a schematic structural diagram of a display panel according to a second embodiment of the present invention.
Reference numerals are as follows:
100: an array substrate;
110: a first signal trace;
111: a VGH signal line;
112: a VGL signal line;
120: a second signal trace;
121: a signal line;
122: an SW switch;
130: a display area;
140: a non-display area;
150: a first binding region;
160: a second binding region;
170: a substrate edge;
200: an anode layer;
300: a light emitting layer;
400: a cathode layer;
500: and (7) packaging the layer.
Detailed Description
The inventor of this application discovers in the course of the work, when display panel uses in wearing the product, for example, in intelligent wrist-watch or the intelligent bracelet, or, use in the cell-phone of narrow frame again, the signal that is connected with pixel array circuit electricity in the display panel is walked the line, the distance from the display panel edge is less, cause in display panel's cutting process, cutting device or other factor, damage easily and walk the line with the signal that pixel array circuit electricity is connected, correspondingly, just also can influence pixel array circuit's normal work, and then reduce display device's qualification rate.
In view of the above technical problems, in the array substrate, the display panel and the display device provided in the embodiments of the present invention, the first signal trace electrically connected to the pixel array circuit is disposed inside the second signal trace, that is, the first signal trace is disposed on a side of the second signal trace away from the edge of the substrate, so that the distance between the first signal trace and the edge of the substrate is increased, accordingly, when the mother board of the display panel is cut, the first signal trace is prevented from being damaged, the normal operation of the pixel array circuit electrically connected to the first signal trace is ensured, and the yield of the display panel is further improved.
In order to make the aforementioned objects, features and advantages of the embodiments of the present invention more comprehensible, embodiments of the present invention are described in detail below with reference to the accompanying drawings. It should be apparent that the described embodiments are only some of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
As shown in fig. 1 and fig. 2, an array substrate 100 according to an embodiment of the present invention includes a substrate, and a pixel array circuit and a detection circuit disposed on the substrate, where the detection circuit is used to perform electrical detection on the pixel array circuit, for example, to detect whether a light emitting unit of a display panel emits light normally, and to detect a gray scale and a brightness of light emitted by the light emitting unit.
The substrate serves as a carrier of the array substrate 100 and is used for supporting devices disposed thereon, and the substrate may be a hard substrate, such as a glass substrate or a plastic substrate, or a flexible substrate, such as a flexible substrate including Polyimide (PI for short).
The array substrate 100 includes a display region 130 and a non-display region 140 surrounding the display region 130, the pixel array circuit is disposed in the display region 130, and the first signal trace 110 is disposed on the substrate, that is, the first signal trace 110 and the detection circuit are disposed in the non-display region 140.
Taking the substrate as a rectangle as an example, the substrate has a left edge, an upper edge, a right edge and a lower edge connected in sequence, in this embodiment, any one of the edges may refer to the substrate edge 170, and the first signal trace 110 and the detection circuit may be disposed between the display area 130 and any one of the edges.
The substrate is provided with a first signal trace 110, and the first signal trace 110 is electrically connected to the pixel array circuit and is used for providing a signal to the pixel array circuit.
The detection circuit includes a second signal trace 120, and the second signal trace 120 is used for providing a detection signal for the pixel array circuit to perform electrical detection on the pixel array circuit.
The second signal trace 120 is located at the outer side of the first signal trace 110, and the second signal trace 120 is close to the substrate edge 170, for example, the first signal trace 110 and the second signal trace 120 may be disposed between the lower edge of the substrate and the display area 130, and the extending direction of the first signal trace 110 and the extending direction of the second signal trace 120 may be consistent with the extending direction of the left edge, in addition, the second signal trace 120 is located at the outer side of the first signal trace 110, that is, the second signal trace 120 is disposed at the left side of the first signal trace 110, that is, the distance from the first signal trace 110 to the left edge of the substrate is greater than the distance from the second signal trace 120 to the left edge of the substrate.
In this embodiment, the second signal trace 120 is disposed outside the first signal trace 110, so that when the mother board of the display panel is cut, the first signal trace 110 is prevented from being damaged, the normal operation of the pixel array circuit electrically connected to the first signal trace 110 is ensured, and the qualification rate of the display panel is further improved.
In addition, the second signal traces 120 are used for electrically detecting the pixel array circuit, and the detection process of the display panel is completed before the cutting process, so that even if the second signal traces 120 are damaged when the mother board of the display panel is cut, the qualification rate of the display panel is not affected.
In some embodiments, the first signal trace 110 may include a power signal line for providing a power signal to the pixel array circuit, where the power signal is a dc signal, such as VGH, VGL, VSS, VDD, and the like. For example, in one embodiment, the power signal line may include a VGH signal line 111, and the VGH signal line 111 is used for providing a high potential signal to the pixel array circuit, that is, the VGH signal line 111 may be electrically connected to a gate of a thin film transistor in the pixel array circuit for controlling the on of the thin film transistor in the pixel array circuit.
For another example, the power signal line further includes a VGL signal line 112, and the VGL signal line 112 is used for providing a low-potential signal to the pixel array circuit, that is, the VGL signal line 112 may be electrically connected to a gate of a thin film transistor in the pixel array circuit, and used for controlling the turn-off of the thin film transistor in the pixel array circuit.
In some embodiments, the second signal trace 120 may be disposed adjacent to the VGH signal line 111, so that after the mother board of the display panel is cut, the second signal trace may be electrically connected to the VGH signal line in a subsequent module bonding process, that is, when an IC or a flexible circuit board is bonded on the array substrate, so that a voltage on the second signal trace 120 is consistent with a voltage on the VGH signal line 111, thereby increasing an antistatic capability of the display panel and ensuring a usability of the display panel.
Because display panel in use or processing procedure in, can cause to form static among the display panel because of the factor among the external environment, this static can cause the damage to display panel, among the correlation technique, in order to reduce the static among the display panel, usually set up the power cord of some constant voltages in the non-display area of display panel, can increase the proportion in non-display area like this undoubtedly, be unfavorable for display panel to use in the cell-phone of narrow frame or dress the product, it is required to explain that, the dress product in this embodiment is in intelligent wrist-watch or intelligent bracelet.
In the embodiment of the present invention, in the subsequent module binding process, that is, when the IC or the flexible circuit board is bound on the array substrate, the second signal trace 120 may be electrically connected to the VGH signal line 111, so that the second signal trace 120 is applied with a constant voltage to increase the antistatic capability of the display panel and ensure the usability of the display panel.
In the embodiment of the invention, the second signal wire 120 has a dual-purpose function, so that in the detection process, the detection signal can be input to the pixel array circuit through the second signal wire 120 to realize the detection function of the array substrate; the second signal routing line 120 can be used as a constant voltage power line for resisting static electricity when the display panel is in use, so that the application range of the second signal routing line 120 is improved, and the screen occupation ratio of the non-display area 140 is reduced.
It should be noted that the second signal trace 120 may include a plurality of signal lines, and even if a portion of the signal lines damaged in the cutting process is the signal lines, the remaining portion of the signal lines may still be used as power lines with a constant voltage, so as to increase the anti-static capability of the display panel.
In some embodiments, the second signal trace 120 is used to provide data signals to the pixel array circuit to drive the pixel array circuit to display, for example: the pixel array circuit comprises a scanning circuit and a pixel circuit electrically connected with the scanning circuit, wherein the pixel circuit can comprise a plurality of sub-pixel circuit groups, the sub-pixel circuit groups can be arranged at intervals along the row direction or the column direction of the array substrate, a scanning circuit is arranged between every two adjacent sub-pixel circuit groups, and the scanning circuit is used for providing a driving signal for one of the sub-pixel circuit groups.
In addition, each sub-pixel circuit group can also comprise a plurality of sub-pixel circuits, and each sub-pixel circuit is used for driving one sub-pixel, so that the independent control of the sub-pixels can be realized, and the display effect of the display panel is ensured.
In this embodiment, the scan circuit is electrically connected to the second signal trace 120, so that the scan circuit inputs a scan signal to the pixel circuit, and the pixel circuit writes a signal within a pulse duration of the scan circuit to control each sub-pixel to perform normal display.
As an embodiment of the second signal trace, the second signal trace 120 may include a plurality of signal lines 121 and a SW switch 122, where the SW switch 122 is used to control the on or off of any one of the signal lines 121.
The signal line 121 is further electrically connected to the pixel array circuit, and is configured to transmit a detection signal to the pixel array circuit, and write the signal into the pixel array circuit through the detection circuit, so as to perform a display test on the display panel.
For example, the light emitting unit in the display panel has three sub-pixels, e.g., a red sub-pixel (R), a green sub-pixel (G), and a blue sub-pixel (B), and in order to detect whether the red sub-pixel, the green sub-pixel, and the blue sub-pixel emit light normally, it is necessary to write a driving signal separately to the red sub-pixel, the green sub-pixel, and the blue sub-pixel, and accordingly, one of the signal lines may be used to supply the driving signal to the red sub-pixel, another signal line may be used to supply the driving signal to the green sub-pixel, and another signal line may be used to supply the driving signal to the blue sub-pixel.
When it is necessary to detect whether the red sub-pixel emits light normally, a driving signal is written to a signal line for providing a driving signal to the red sub-pixel, and then the SW switch 122 controls the signal line to be communicated with the pixel array circuit and writes a signal to a sub-pixel circuit in the pixel circuit for controlling the red sub-pixel to emit light, so that the red sub-pixel emits light, and the detection of the red sub-pixel is realized.
Meanwhile, the detection process of the green sub-pixel and the blue sub-pixel is the same as the detection process of the red sub-pixel, and the details are not repeated herein.
In some embodiments, the end of the first signal trace 110 facing the edge of the substrate forms a first bonding area 150, and the end of the second signal trace 120 facing the edge of the substrate forms a second bonding area 160, wherein the first bonding area 150 and the second bonding area 160 are used for bonding the flexible circuit board.
It should be noted that, when the first signal trace 110 and the second signal line 120 are disposed between the display region 130 and the lower edge of the substrate, the edge of the substrate in this embodiment may refer to the lower edge of the substrate, and accordingly, the end of the first signal trace 110 facing the edge of the substrate forms the first bonding region 150, i.e., the end of the first signal trace 110 facing the lower edge of the substrate forms the first bonding region 150.
If the flexible circuit board (PFC) is directly crimped on the first signal trace 110 and the second signal trace 120, in view of the small diameters of the first signal trace 110 and the second signal trace 120, on one hand, the difficulty of crimping is increased, and on the other hand, writing of signals is not facilitated, therefore, in this embodiment, the first binding region 150 is formed at the end of the first signal line 111 away from the pixel array circuit, the second binding region 160 is formed at the end of the second signal trace 120 away from the detection circuit, and through the arrangement of the first binding region 150 and the second binding region 160, the contact area between the first signal trace 110 and the flexible circuit board and the contact area between the second signal trace 120 and the flexible circuit board are increased, thereby reducing the difficulty of crimping and facilitating writing of signals.
Example two
A second aspect of this embodiment provides a display panel including the array substrate, and therefore, the display panel also has the same advantages as the array substrate.
This embodiment is through walking the line setting with the second signal in the outside that the line was walked to the first signal, when cutting the display panel mother board, avoids walking the line to cause the damage to the first signal like this, has guaranteed to walk the normal work of the pixel array circuit of line electricity connection with the first signal, and then has improved display panel's qualification rate.
The second signal trace 120 is electrically connected to the VGH signal line 111 in the first signal trace 110, that is, the gold finger of the second signal trace 120 is connected to the gold finger of the VGH signal line 111 in the first signal trace 110, and meanwhile, the SW switch in the second signal trace 120 controls the signal line to be disconnected, so that the second signal trace does not provide the VGH signal for the pixel array circuit. When the flexible circuit board provides a high potential for the VGH signal line, correspondingly, the second signal wiring also has a high potential, so that the second signal wiring has a constant voltage, the antistatic capability of the display panel can be increased, and the use performance of the display panel can be ensured.
As shown in fig. 3, the display panel disclosed in this embodiment may further include an anode layer 200, a light emitting layer 300, and a cathode layer 400 sequentially stacked on the array substrate 100, wherein the anode layer 200 is located on the array substrate 100 and is used for generating holes, the cathode layer 400 is used for generating electrons, the light emitting layer 300 is located between the anode layer 200 and the cathode layer 400, the electrons generated by the cathode layer 400 and the holes generated by the anode layer 200 are combined in the light emitting layer to form electron-hole pairs, i.e., excitons, which can transfer energy to the organic light emitting material of the light emitting layer, so that the organic light emitting material emits light.
In addition, the display panel may further include an encapsulation layer 500 on the cathode layer 400, for example, the encapsulation layer 500 may be connected to the cathode layer 400 by an encapsulation adhesive, and the encapsulation layer 500 is used to encapsulate the array substrate 100 and the light emitting layer 300, so as to prevent water, oxygen, dust and radiation from entering the light emitting layer, thereby ensuring reliable operation of the display panel.
The encapsulation layer 500 may be an inorganic thin film such as a silicon nitride film; organic films, such as polymeric films, are also possible. In addition, in order to ensure the transparency of the packaging layer, the packaging layer can also be made of a transparent material.
EXAMPLE III
The embodiment of the invention also provides a display device which comprises the flexible circuit board and the display panel in the embodiment.
The display device can be applied to smart phones, tablet computers, notebook computers, mobile terminals with display screens or other terminal equipment.
In addition, the flexible circuit board is used for providing signals for the pixel array circuit in the display panel to control the normal operation of the pixel array circuit, for example, the flexible circuit board may be electrically connected with the VGH signal line in the first signal routing to provide a high potential for the VGH signal line.
Since the display device provided in this embodiment includes the display panel described in the above embodiment, the display device also has the same advantages as the display screen described above, and specific reference may be made to related descriptions, which are not repeated herein.
In the present specification, each embodiment or implementation mode is described in a progressive manner, and the emphasis of each embodiment is on the difference from other embodiments, and the same and similar parts between the embodiments may be referred to each other.
In the description of the present specification, reference to the description of "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" or the like means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present invention. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
In the present invention, unless otherwise expressly stated or limited, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through an intermediate. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.
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 at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless explicitly specified otherwise.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and these modifications or substitutions do not depart from the spirit of the corresponding technical solutions of the embodiments of the present invention.
Claims (7)
1. The array substrate is characterized by comprising a substrate, a pixel array circuit and a detection circuit, wherein the pixel array circuit and the detection circuit are arranged on the substrate;
the substrate is also provided with a first signal wire which is electrically connected with the pixel array circuit;
the detection circuit comprises a second signal wire, and the second signal wire is used for carrying out electrical detection on the pixel array circuit;
the second signal wire is positioned at the outer side of the first signal wire, and the second signal wire is close to the edge of the substrate;
the first signal wiring includes a power supply signal line for supplying a power supply signal to the pixel array circuit;
the power supply signal line includes a VGH signal line for supplying a high potential signal to the pixel array circuit;
the second signal routing line is arranged adjacent to the VGH signal line.
2. The array substrate of claim 1, wherein the second signal trace is configured to provide a data signal to the pixel array circuit.
3. The array substrate of claim 2, wherein the second signal trace comprises a plurality of signal lines and a SW switch, and the SW switch is used for controlling on/off of any one of the signal lines;
the signal line is connected with the pixel array circuit and used for providing a detection signal for the pixel array circuit.
4. The array substrate of any one of claims 1-3, wherein the first signal trace forms a first bonding area near an end of the substrate edge, and the second signal trace forms a second bonding area towards an end of the substrate edge;
the first binding region and the second binding region are used for binding a flexible circuit board.
5. A display panel comprising the array substrate according to any one of claims 1 to 4.
6. The display panel of claim 5, wherein a second signal trace is electrically connected to a VGH signal line in the first signal trace.
7. A display device characterized by comprising a flexible circuit board and the display panel according to claim 5 or 6;
the flexible circuit board is used for providing signals for the pixel array circuit in the display panel.
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20090236599A1 (en) * | 2008-03-20 | 2009-09-24 | Chunghwa Picture Tubes, Ltd. | Active device array substrate |
| CN206541109U (en) * | 2016-12-23 | 2017-10-03 | 上海中航光电子有限公司 | A kind of array base palte, liquid crystal display panel and electronic equipment |
| CN109638023A (en) * | 2019-02-28 | 2019-04-16 | 昆山国显光电有限公司 | A kind of array substrate, display panel and film layer crack detecting method |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20090236599A1 (en) * | 2008-03-20 | 2009-09-24 | Chunghwa Picture Tubes, Ltd. | Active device array substrate |
| CN206541109U (en) * | 2016-12-23 | 2017-10-03 | 上海中航光电子有限公司 | A kind of array base palte, liquid crystal display panel and electronic equipment |
| CN109638023A (en) * | 2019-02-28 | 2019-04-16 | 昆山国显光电有限公司 | A kind of array substrate, display panel and film layer crack detecting method |
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