CN110189672B - Display panel, detection method thereof and display device - Google Patents
Display panel, detection method thereof and display device Download PDFInfo
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- CN110189672B CN110189672B CN201910570250.1A CN201910570250A CN110189672B CN 110189672 B CN110189672 B CN 110189672B CN 201910570250 A CN201910570250 A CN 201910570250A CN 110189672 B CN110189672 B CN 110189672B
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- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/006—Electronic inspection or testing of displays and display drivers, e.g. of LED or LCD displays
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Abstract
The invention discloses a display panel, a detection method thereof and a display device.A driving signal line and a detection signal line are electrically connected with a driving chip through a corresponding third control unit, a first control unit is respectively and electrically connected with a first control terminal and control ends of all the third control units, and a second control unit is respectively and electrically connected with a second control terminal and control ends of all the third control units. When the display area is driven to display, the second control unit controls the third control unit to be conducted, so that the driving chip and the driving signal line are conducted, driving signals generated by the driving chip are transmitted to the display area through the driving signal line, and the display function is achieved.
Description
Technical Field
The invention relates to the technical field of display, in particular to a display panel, a detection method thereof and a display device.
Background
As shown in fig. 1, the display panel may include: the display device includes a display area A1, a bending area A2, and a bonding area A3, where the bonding area A3 has a plurality of driving signal lines 110 for inputting driving signals to the display area A1, detection signal lines 120 electrically connected to the driving signal lines 110 in a one-to-one correspondence, and driving chips 130 electrically connected to one ends of the driving signal lines 110, respectively. After the display panel is manufactured, the display panel may have defects, and thus, the quality of the display panel needs to be checked. When the display panel is lighted, a detection signal is generally applied to the detection signal line 120 through the detection fixture, and the detection signal is input to the display area A1 through the detection signal line and the driving signal line, so that the display area A1 is controlled to be lighted, and whether the display panel is defective or not is detected.
However, since the driving signal line 110 is also electrically connected to the driving chip 130, the detection signal may be interfered by the internal circuit of the driving chip 130, which may cause an abnormal lighting of the display area A1, thereby affecting the accuracy of the detection result of the display panel.
Disclosure of Invention
The embodiment of the invention provides a display panel, a detection method thereof and a display device, which are used for solving the problem that the accuracy of a detection result is reduced due to the interference of an internal circuit of a driving chip during lighting detection.
An embodiment of the present invention provides a display panel, including: the display area, the bending zone and the binding zone that set gradually, the binding zone has: the circuit comprises a plurality of driving signal lines, a driving chip electrically connected with one end of each driving signal line, a detection signal line electrically connected with each driving signal line in a one-to-one correspondence mode, a first control terminal, a second control terminal, a first control unit, a second control unit and a third control unit in one-to-one correspondence with each driving signal line;
each driving signal line and each detection signal line are electrically connected with the driving chip through the corresponding third control unit;
the first control unit is respectively and electrically connected with the first control terminal and the control ends of all the third control units;
the second control unit is electrically connected with the second control terminal and the control ends of all the third control units respectively.
Optionally, in an embodiment of the present invention, the first control unit includes: a first transistor;
the first electrode of the first transistor is electrically connected with the first control terminal, and the gate and the second electrode of the first transistor are both electrically connected with the control ends of all the third control units.
Optionally, in an embodiment of the present invention, the second control unit includes: a second transistor;
and the grid electrode and the first electrode of the second transistor are electrically connected with the second control terminal, and the second electrode of the second transistor is electrically connected with the control ends of all the third control units.
Optionally, in an embodiment of the present invention, the third control unit includes: a third transistor;
a gate of the third transistor is used as a control electrode of the third control unit, a first electrode of the third transistor is electrically connected to the driving chip, and a second electrode of the third transistor is electrically connected to the driving signal line and the detection signal terminal, respectively.
Optionally, in an embodiment of the present invention, the display panel further includes: a flexible circuit board;
the flexible circuit board is electrically connected with the driving chip and the second control terminal respectively.
Optionally, in the embodiment of the present invention, the number of the first control units is N, and the number of the first control terminals is N; one first control unit is correspondingly and electrically connected with one first control terminal; n is a positive even number;
and dividing the N first control units into two first unit groups, wherein the two first unit groups are oppositely arranged at two sides of all the driving signal lines.
Optionally, in the embodiment of the present invention, the number of the second control units is M, and the number of the second control terminals is M; one second control unit is correspondingly and electrically connected with one second control terminal; m is a positive even number;
and dividing the M second control units into two second unit groups, wherein the two second unit groups are oppositely arranged at two sides of all the driving signal lines.
Correspondingly, the embodiment of the invention also provides a display device which comprises the display panel.
Correspondingly, an embodiment of the present invention further provides a method for detecting the display panel, including:
in the lighting detection stage, the second control terminal is controlled to float, the detection jig is electrically connected with the first control terminal, a first voltage signal is loaded on the first control terminal, and the third control units are controlled to be closed;
and loading detection signals to the detection signal lines through the detection jig.
Optionally, in an embodiment of the present invention, after the lighting detection stage, the method further includes: a reliability detection stage;
and in the reliability detection stage, the first control terminal is controlled to be in floating connection, the flexible circuit board is used for controlling the driving chip to output signals, and the second control terminal is loaded with a second voltage signal to control the conduction of each third control unit.
The invention has the following beneficial effects:
in the display panel, the detection method thereof and the display device provided by the embodiment of the invention, each driving signal line and each detection signal line are electrically connected with the driving chip through the corresponding third control unit, the first control unit is electrically connected with the first control terminal and the control ends of all the third control units respectively, and the second control unit is electrically connected with the second control terminal and the control ends of all the third control units respectively, so that the third control unit can be controlled by the first control unit to be turned off in the lighting detection stage, the driving chip is isolated from the driving signal lines, the influence of an internal circuit in the driving chip on the detection signal is further avoided, and the detection result is improved. When the display area is driven to display, the second control unit controls the third control unit to be conducted, so that the driving chip is conducted with the driving signal line, and the driving signal generated by the driving chip is transmitted to the display area through the driving signal line, so that the display function is realized.
Drawings
Fig. 1 is a schematic structural diagram of a display panel in the related art;
fig. 2 is a schematic structural diagram of a display panel according to an embodiment of the present invention;
fig. 3 is a second schematic structural diagram of a display panel according to an embodiment of the invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the drawings of the embodiments of the present invention. It is to be understood that the embodiments described are only a few embodiments of the present invention, and not all embodiments. And the embodiments and features of the embodiments may be combined with each other without conflict. All other embodiments, which can be derived by a person skilled in the art from the described embodiments of the invention without inventive step, are within the scope of protection of the invention.
Unless defined otherwise, technical or scientific terms used herein shall have the ordinary meaning as understood by one of ordinary skill in the art to which this invention belongs. The use of "first," "second," and similar terms in the present application do not denote any order, quantity, or importance, but rather the terms are used to distinguish one element from another. The word "comprising" or "comprises", and the like, means that the element or item listed before the word covers the element or item listed after the word and its equivalents, but does not exclude other elements or items. The terms "connected" or "coupled" and the like are not restricted to physical or mechanical connections, but may include electrical connections, whether direct or indirect.
It should be noted that the sizes and shapes of the various figures in the drawings are not to scale, but are merely intended to illustrate the present disclosure. And like reference numerals refer to like or similar elements or elements having like or similar functions throughout.
An embodiment of the present invention provides a display panel, as shown in fig. 2, which may include: the display area A1, the bending area A2 and the binding area A3 that set gradually, binding area A3 has: a plurality of driving signal lines 110, a driving chip 130 electrically connected to one end of each driving signal line 110, a detection signal line 120 electrically connected to each driving signal line 110 in a one-to-one correspondence, a first control terminal 211, a second control terminal 221, a first control unit 210, a second control unit 220, and a third control unit 230 electrically connected to each driving signal line 110 in a one-to-one correspondence; each driving signal line 110 and each detection signal line 120 are electrically connected to the driving chip 130 through the corresponding third control unit 230; the first control unit 210 is electrically connected to the first control terminal 211 and the control terminals of all the third control units 230, respectively; and the second control unit 220 is electrically connected to the second control terminal 221 and the control terminals of all the third control units 230, respectively.
In the display panel provided by the embodiment of the invention, each driving signal line and each detection signal line are electrically connected with the driving chip through the corresponding third control unit, the first control unit is electrically connected with the first control terminal and the control ends of all the third control units respectively, and the second control unit is electrically connected with the second control terminal and the control ends of all the third control units respectively, so that the third control unit can be controlled to be turned off by the first control unit in the lighting detection stage, the driving chip is isolated from the driving signal lines, the influence of an internal circuit in the driving chip on the detection signal is further avoided, and the detection result is improved. When the display area is driven to display, the second control unit controls the third control unit to be conducted, so that the driving chip is conducted with the driving signal line, and the driving signal generated by the driving chip is transmitted to the display area through the driving signal line, so that the display function is realized.
The present invention will be described in detail with reference to specific examples. It should be noted that, in the present embodiment, the present invention is better explained, but not limited to.
In order to improve the driving capability, in the embodiment of the present invention, as shown in fig. 2, N first control units 210 and N first control terminals 211 may be set in order to implement the embodiment of the present invention; wherein N is a positive even number; one first control unit 210 is electrically connected to one first control terminal 211. This makes it possible for the N first control units to jointly control all the third control units. In addition, in order to allow the first control units 210 to be symmetrically disposed in the display panel, the N first control units may be divided into two first unit groups, and the two first unit groups may be oppositely disposed at both sides of all the driving signal lines. For example, N =2 may be set, and one first control unit is provided in one first unit group, and the two first control units 210 may be oppositely disposed on both sides of all the driving signal lines. Of course, in practical applications, N =4, 6, 8, etc. may be used, which is determined by design according to the practical application environment, and is not limited herein.
Further, in order to improve the driving capability, in the embodiment of the present invention, as shown in fig. 2, the second control units 220 may be set to M, and the second control terminals 221 may be set to M; wherein M is a positive even number; a second control unit 220 is electrically connected to a second control terminal 221. This makes it possible for the M second control units to control all the third control units in common. Also, in order that the second control units 220 may be symmetrically disposed in the display panel, the M second control units may be divided into two second unit groups, and the two second unit groups may be oppositely disposed at both sides of all the driving signal lines. For example, M =2 may be set, and one second control unit is provided in one second unit group, and the two second control units 220 may be oppositely disposed on both sides of all the driving signal lines. Of course, in practical applications, M =4, 6, 8, etc. may be used, which is determined by design according to practical application environments, and is not limited herein.
In practical implementation, in the embodiment of the present invention, as shown in fig. 2 and fig. 3, the third control unit 230 may include: a third transistor M3; the gate of the third transistor M3 is used as the control electrode of the third control unit 230, the first electrode of the third transistor M3 is electrically connected to the driving chip 130, and the second electrode of the third transistor M3 is electrically connected to the driving signal line 110 and the detection signal terminal 120, respectively.
In specific implementation, in the embodiment of the present invention, as shown in fig. 2, the first control unit 210 may include: a first transistor M1; a first electrode of the first transistor M1 is electrically connected to the first control terminal 211, and a gate and a second electrode of the first transistor M1 are electrically connected to the control terminals of all the third control units 230. Specifically, the gate and the second pole of the first transistor M1 are electrically connected to the gates of all the third transistors M3.
In practical implementation, in the embodiment of the present invention, as shown in fig. 2 and fig. 3, the second control unit 220 may include: a second transistor M2; the gate and the first electrode of the second transistor M2 are electrically connected to the second control terminal 221, and the second electrode of the second transistor M2 is electrically connected to the control terminals of all the third control units 230. Illustratively, the second poles of the second transistors M2 are electrically connected to the gates of all the third transistors M3.
In specific implementation, in the embodiment of the present invention, as shown in fig. 2 and fig. 3, the transistor may be a P-type transistor. The gate voltage Vg and the source voltage Vs of the P-type transistor satisfy the formula: vg-Vs < 0. Of course, the transistor may be an N-type transistor. Wherein, the gate voltage Vg and the source voltage Vs of the N-type transistor satisfy the formula: vg-Vs > 0. The following description will be given taking as an example that all transistors are P-type transistors.
In a specific implementation, in the embodiment of the present invention, the one of the first electrode and the second electrode of the transistor with a higher voltage may be used as a source, and the one with a lower voltage may be used as a drain. In practical applications, the design may be determined according to practical application environments, and is not limited herein.
In practical implementation, in the embodiment of the present invention, the display panel may be an electroluminescent display panel, and further, the display area has a plurality of pixel units, and each pixel unit may include an electroluminescent diode and a pixel circuit for driving the electroluminescent diode to emit light. The pixel circuit is electrically connected with the grid line and the data line respectively, and when the transistor in the pixel circuit is controlled by the grid line to be conducted, a data signal transmitted on the data line can be input to the grid electrode of the driving transistor in the pixel circuit. The driving signal line may include at least one of a data line and a gate line. Further, the electroluminescent diode may include: an Organic Light-Emitting Diode (OLED) or a Quantum Dot Light-Emitting Diode (QLED), which is not limited herein. Further, the substrate of the display panel is a flexible substrate.
In specific implementation, in the embodiment of the present invention, the driving signal line extends in a direction from the bonding region to the bending region to extend into the display region, so as to provide a signal to the display region through the driving signal line.
In a specific implementation, in the embodiment of the present invention, the transistors and the gates of the transistors in the pixel circuits in the display area are disposed in the same material in the same layer. Therefore, the grid electrodes of the transistors in the display area and the binding area can be formed by adopting a one-time composition process, and the process preparation difficulty is reduced.
In a specific implementation, in the embodiment of the present invention, the transistors and the active layers of the transistors in the pixel circuits in the display area are disposed in the same material in the same layer. Therefore, the active layers of the transistors in the display area and the binding area can be formed by adopting a one-time composition process, and the process preparation difficulty is reduced.
In specific implementation, in the embodiment of the present invention, the transistors and the source and drain electrodes of the transistors in the pixel circuits in the display region are arranged in the same material in the same layer. Therefore, the source and drain electrodes of the transistors in the display area and the binding area can be formed by adopting a one-step composition process, and the process preparation difficulty is reduced.
Signals are generally output to the driving chip through a Flexible Printed Circuit (FPC) to control the driving chip to output the signals. In specific implementation, in the embodiment of the present invention, as shown in fig. 3, the display panel may further include: a flexible circuit board 300; the flexible circuit board 300 is electrically connected to the driving chip 130 and the second control terminal 221, respectively. Thus, signals can be output to the driving chip 130 through the flexible circuit board 300 to control the driving chip 130 to output signals. And outputting a signal to the second control terminal 221 through the flexible circuit board 300 to control the second transistor M2 to be turned on.
Further, in practical implementation, in an embodiment of the present invention, the display panel further includes: a Printed Circuit Board (PCB) to output a signal to the FPC through the PCB.
Based on the same inventive concept, the embodiment of the invention also provides a detection method of the display panel. The detection method can comprise the following steps:
in the lighting detection stage, the second control terminal is controlled to float, the detection jig is electrically connected with the first control terminal, a first voltage signal is loaded to the first control terminal, and each third control unit is controlled to be closed;
and loading detection signals to the detection signal lines through the detection jig.
In a specific implementation, after the lighting detection stage, the method may further include: a reliability detection stage;
and in the reliability detection stage, the first control terminal is controlled to be in floating connection, the flexible circuit board is used for controlling the driving chip to output signals, and the second control terminal is loaded with second voltage signals to control the conduction of each third control unit.
In a specific implementation manner, in the embodiment of the present invention, in the display stage, the first control terminal is controlled to float, the flexible circuit board controls the driving chip to output a signal, and the second control terminal is loaded with the second voltage signal to control the third control units to be turned on.
The following describes a detection process of the display panel according to the embodiment of the present invention with reference to the structures of the display panel shown in fig. 2 and fig. 3, but readers will understand that the specific process is not limited thereto.
In the lighting detection stage, the detection fixture is electrically connected to each first control terminal 211 to apply a first voltage signal (e.g. a voltage signal of 7V) to the first control terminal 211, since the gate voltage Vg of the first transistor M1 and the source voltage Vs thereof satisfy: vg-Vs =0V-7V = -7V, the first transistor M1 is controlled to be turned on to supply the first voltage signal to each third transistor M3, and each third transistor M3 is controlled to be turned off, thereby disconnecting the driving chip 130 from the driving signal line 110. And, the second control terminal 221 is controlled to float, so that Vg of the second transistor and the source voltage Vs thereof satisfy: vg-Vs =0V-0V =0V, the second transistor M2 is controlled to be turned off, thereby disconnecting the second control terminal 221 from each third transistor M3.
By loading the detection signal to each detection signal line 120 through the detection fixture, since the third transistor M3 is turned off, the influence of the internal circuit in the driving chip 130 on the detection signal can be avoided, and thus the display area A1 of the display panel can be controlled to be turned on through the detection signal to detect whether the display panel is defective or not. If no defect is found in the lighting detection stage, the components such as the FPC300 and the PCB are assembled.
And then assembling the display panel with elements such as an FPC (flexible printed circuit), a PCB (printed circuit board) and the like. After the assembly is completed, a reliability testing stage is performed to test the reliability of the display panel (e.g., testing the reliability at 85 deg.C and 85 deg.C). In the reliability detection phase, a second voltage signal (for example, a voltage signal of-7V) is applied to the second control terminal 221 through the FPC, since the gate voltage Vg of the second transistor M2 and the source voltage Vs thereof satisfy: vg-Vs = -7V-0V = -7V, the second transistor M2 is controlled to be turned on to provide the second voltage signal to each third transistor M3, and each third transistor M3 is controlled to be turned on to turn on the driving chip 130 and the driving signal line 110. And outputting signals to the driving chip through the FPC to control the driving chip 130 to output signals to each driving signal line 110 so as to control the display area A1 of the display panel to be lightened, so as to perform a reliability test on the display panel.
It should be noted that, in the reliability test, the first control terminal 211 is controlled to float, so that Vg of the first transistor M1 and the source voltage Vs thereof satisfy: vg-Vs = -7V-0V = -7V, the first transistor M1 may be controlled to be turned on, so that the first control terminal 211 has a voltage of-7V, and the reliability test is not affected because no other signal is loaded to the first control terminal 211 at this stage.
In a specific implementation, the voltage value of the first voltage signal is different from the voltage value of the second voltage signal. Of course, in practical applications, the voltage value of the first voltage signal and the voltage value of the second voltage signal may be determined according to the type of the transistor in the practical application environment, and are not limited herein.
When the display panel enters the display stage and normal display is realized, a second voltage signal (for example, a voltage signal of-7V) is applied to the second control terminal 221 through the FPC, since the gate voltage Vg of the second transistor M2 and the source voltage Vs thereof satisfy: vg-Vs = -7V-0V = -7V, the second transistor M2 is controlled to be turned on to provide the second voltage signal to each third transistor M3, and each third transistor M3 is controlled to be turned on to turn on the driving chip 130 and the driving signal line 110. And outputting signals to the driving chip through the FPC to control the driving chip 130 to output signals to each driving signal line 110, so as to control the display area A1 of the display panel to display, so that the display panel realizes a display function. And, the first control terminal 211 is controlled to float, so that Vg of the first transistor M1 and the source voltage Vs thereof satisfy: vg-Vs = -7V-0V = -7V, the first transistor M1 may be controlled to be turned on, so that the first control terminal 211 has a voltage of-7V, and the first control terminal 211 does not load other signals at this stage, so that the display is not affected.
Based on the same inventive concept, the embodiment of the invention further provides a display device, which comprises the display panel provided by the embodiment of the invention. The principle of the display device to solve the problem is similar to the display panel, so the implementation of the display device can be referred to the implementation of the display panel, and repeated details are not repeated herein.
In specific implementation, the display device provided in the embodiment of the present invention may be: any product or component with a display function, such as a mobile phone, 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.
In the display device, the components such as the FPC and the PCB are disposed on the backlight side of the display panel, and the bending region of the display panel needs to be bent so that the bonding region is disposed on the backlight side of the display panel, which may reduce the lower frame of the display panel.
In the display panel, the detection method thereof and the display device provided by the embodiment of the invention, each driving signal line and each detection signal line are electrically connected with the driving chip through the corresponding third control unit, the first control unit is electrically connected with the first control terminal and the control ends of all the third control units respectively, and the second control unit is electrically connected with the second control terminal and the control ends of all the third control units respectively, so that the third control unit can be controlled by the first control unit to be turned off in the lighting detection stage, the driving chip is isolated from the driving signal lines, the influence of an internal circuit in the driving chip on the detection signal is further avoided, and the detection result is improved. When the display area is driven to display, the second control unit controls the third control unit to be conducted, so that the driving chip is conducted with the driving signal line, and the driving signal generated by the driving chip is transmitted to the display area through the driving signal line, so that the display function is realized.
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 (9)
1. A display panel, comprising: the display area, the bending zone and the binding zone that set gradually, the binding zone has: the circuit comprises a plurality of driving signal lines, driving chips electrically connected with one end of each driving signal line, detection signal lines electrically connected with the driving signal lines in a one-to-one correspondence manner, a first control terminal, a second control terminal, a first control unit, a second control unit and a third control unit corresponding to the driving signal lines in a one-to-one correspondence manner;
each driving signal line and each detection signal line are electrically connected with the driving chip through the corresponding third control unit;
the first control unit is respectively and electrically connected with the first control terminal and the control ends of all the third control units;
the second control unit is respectively electrically connected with the second control terminal and the control ends of all the third control units;
wherein the second control unit includes: a second transistor;
and the grid electrode and the first electrode of the second transistor are electrically connected with the second control terminal, and the second electrode of the second transistor is electrically connected with the control ends of all the third control units.
2. The display panel according to claim 1, wherein the first control unit includes: a first transistor;
the first electrode of the first transistor is electrically connected with the first control terminal, and the gate and the second electrode of the first transistor are both electrically connected with the control ends of all the third control units.
3. The display panel according to claim 1, wherein the third control unit includes: a third transistor;
a gate of the third transistor is used as a control electrode of the third control unit, a first electrode of the third transistor is electrically connected to the driving chip, and a second electrode of the third transistor is electrically connected to the driving signal line and the detection signal terminal, respectively.
4. The display panel of claim 1, wherein the display panel further comprises: a flexible circuit board;
the flexible circuit board is electrically connected with the driving chip and the second control terminal respectively.
5. The display panel according to any one of claims 1 to 4, wherein the number of the first control units is N, and the number of the first control terminals is N; one first control unit is electrically connected with one first control terminal correspondingly; n is a positive even number;
and dividing the N first control units into two first unit groups, wherein the two first unit groups are oppositely arranged at two sides of all the driving signal lines.
6. The display panel according to any one of claims 1 to 4, wherein the number of the second control units is M, and the number of the second control terminals is M; one second control unit is correspondingly and electrically connected with one second control terminal; m is a positive even number;
and dividing the M second control units into two second unit groups, wherein the two second unit groups are oppositely arranged at two sides of all the driving signal lines.
7. A display device comprising the display panel according to any one of claims 1 to 6.
8. The method for inspecting a display panel according to any one of claims 1 to 6, comprising:
a lighting detection stage, controlling the second control terminal to float, electrically connecting a detection jig with the first control terminal, loading a first voltage signal to the first control terminal, and controlling each third control unit to be closed;
and loading detection signals to the detection signal lines through the detection jig.
9. The detection method of claim 8, further comprising, after the lighting detection phase: a reliability detection stage;
and in the reliability detection stage, the first control terminal is controlled to be in floating connection, the flexible circuit board is used for controlling the driving chip to output signals, and the second control terminal is loaded with a second voltage signal to control the conduction of each third control unit.
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| CN110875001A (en) * | 2019-11-29 | 2020-03-10 | 京东方科技集团股份有限公司 | Test circuit, display substrate, display panel and test method |
| CN110874989B (en) * | 2019-11-29 | 2021-06-22 | 武汉天马微电子有限公司 | Display panel, display device and test method |
| CN111261055B (en) * | 2020-01-21 | 2022-02-22 | 京东方科技集团股份有限公司 | OLED display screen and OLED display device |
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