CN107967887B - Grid driving circuit, method for measuring routing short-circuit point and display panel - Google Patents
Grid driving circuit, method for measuring routing short-circuit point and display panel Download PDFInfo
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- CN107967887B CN107967887B CN201810002172.0A CN201810002172A CN107967887B CN 107967887 B CN107967887 B CN 107967887B CN 201810002172 A CN201810002172 A CN 201810002172A CN 107967887 B CN107967887 B CN 107967887B
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
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- G—PHYSICS
- 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
Abstract
The invention relates to the technical field of displays, and provides a gate driving circuit, a method for measuring a wiring short-circuit point and a display panel. The gate driving circuit comprises a plurality of wires and a plurality of shift register units, wherein each shift register unit is connected with the plurality of wires and comprises: a plurality of detection switches and a detection terminal. The plurality of detection switches are respectively positioned between each routing wire and each shift register unit; the detection terminals are respectively connected with two ends of each wire. The gate driving circuit provided by the invention can detect whether the wiring is short-circuited or not by detecting the resistance between the detection terminals, and can determine the position of a short-circuit point according to the detected resistance.
Description
Technical Field
The present disclosure relates to the field of display technologies, and in particular, to a gate driving circuit, a method for determining a trace short-circuit point, and a display panel.
Background
In recent years, display devices have developed a trend of high integration and low cost, and in order to achieve low cost and narrow frames of display devices, the conventional display panel mostly adopts a Gate driver On Array (GOA) technology, that is, a Gate driver circuit is directly fabricated On an Array substrate, so that space occupation of an IC Bonding (Bonding) and Fan-Out (Fan-Out) area is eliminated, and cost reduction in the aspects of materials, preparation processes and the like and narrowing of frames On two sides of Gate lines of the display panel are achieved. However, short circuits are easily generated between the wires in the GOA products, which results in abnormal display of the display device.
In the related art, detection points are usually reserved on the printed circuit board, and each detection point is connected with one end of one trace. And measuring the resistance between the two wires through the detection point, and determining that the short circuit occurs between the two wires when the resistance between the two wires is smaller than a first preset value. And then, cutting the peripheral wires from far to near, and determining the cutting position as a short circuit point when the resistance between the two wires is greater than a second preset value. In the related art, the display panel can be disassembled, and the short circuit point of the wiring can be detected by the dichotomy.
However, both of the above methods have a certain damage to the display panel, and both of them lack practical operability when the screen size of the display device is large and the resolution is high.
It is to be noted that the information disclosed in the above background section is only for enhancement of understanding of the background of the present disclosure, and thus may include information that does not constitute prior art known to those of ordinary skill in the art.
Disclosure of Invention
The present disclosure is directed to a gate driving circuit, a method for determining a short-circuit point of a trace, and a display panel, so as to overcome, at least to a certain extent, the problems of the related art that the display panel needs to be damaged when the short-circuit point is detected and the operability is poor.
According to an aspect of the present invention, there is provided a gate driving circuit including a plurality of wirings and a plurality of shift register units, each of the shift register units being connected to the plurality of wirings, the gate driving circuit including: a plurality of detection switches and a detection terminal. The plurality of detection switches are respectively positioned between each routing wire and each shift register unit; the detection terminals are respectively connected with two ends of each wire.
In one exemplary embodiment of the present invention, the detection switch is a thin film transistor.
In an exemplary embodiment of the present invention, the detection terminal is located at a DPO side or a DP side of the array substrate where the gate driving circuit is located.
According to an aspect of the present invention, a method for determining a short-circuit point of a gate driver circuit trace is provided, where the gate driver circuit includes a plurality of traces, a detection switch is disposed between each trace and a shift register unit, and two ends of each trace are connected to detection terminals, and the method includes:
for a first wire to be detected and a second wire to be detected in the wires, the connection between the first wire to be detected and the second wire to be detected and the shift register unit is cut off through the detection switch;
detecting the resistance between the detection terminals at the two ends of the first wire to be detected and the second wire to be detected;
and judging whether the first to-be-detected wire and the second to-be-detected wire are short-circuited according to the detected resistance, and determining the position of a short-circuit point according to the resistance.
In an exemplary embodiment of the invention, the detecting the resistance between the detection terminals at two ends of the first trace to be detected and the second trace to be detected includes:
detecting the resistance between a first detection terminal at the first end of the first wire to be detected and a third detection terminal at the first end of the second wire to be detected;
detecting the resistance between a first detection terminal at the first end of the first wire to be detected and a fourth detection terminal at the second end of the second wire to be detected;
and detecting the resistance between the third detection terminal of the first end of the second wire to be detected and the fourth detection terminal of the second end of the second wire to be detected.
In one exemplary embodiment of the present invention, in the method, the resistance between the detection terminals is detected using kelvin four-wire detection method.
In an exemplary embodiment of the invention, the determining whether the first trace to be tested and the second trace to be tested are short-circuited according to the detected resistance includes:
and if the resistance between the first detection terminal and the third detection terminal is smaller than a preset resistance, determining that the first to-be-detected wire and the second to-be-detected wire are short-circuited.
In an exemplary embodiment of the present invention, determining the position of the judgment short-circuit point includes:
and determining the position of the short circuit point according to the equivalent resistance of the circuit between the first end of the second wire to be tested and the second end of the second wire to be tested, the equivalent resistance of the circuit between the first end of the second wire to be tested and the short circuit point and the total length of the second wire to be tested.
In an exemplary embodiment of the invention, calculating an equivalent resistance b of the line between the first end of the second trace to be tested and the short-circuit point according to b ═ R1-R2+ R3)/2;
wherein: r1 ═ a + d + b, R2 ═ a + d + c, R3 ═ c + b; a is an equivalent resistance of a line between the first end of the first wire to be tested and the short-circuit point, b is an equivalent resistance of a line between the first end of the second wire to be tested and the short-circuit point, c is an equivalent resistance of a line between the second end of the second wire to be tested and the short-circuit point, d is a short-circuit point resistance, R1 is a resistance between the first detection terminal and the third detection terminal, R2 is a resistance between the first detection terminal and the fourth detection terminal, and R3 is a resistance between the third detection terminal and the fourth detection terminal.
According to an aspect of the present invention, a display panel is provided, which includes the gate driving circuit.
According to the technical scheme, the advantages and positive effects of the gate driving circuit, the method for measuring the trace short-circuit point and the display panel are as follows:
the gate driving circuit provided by the invention comprises: the detection switch is positioned between each wire and each shift register unit, and the detection terminals are positioned at two ends of each wire. On one hand, the short circuit detection device can detect whether the wiring is short-circuited or not by detecting the resistance between the detection terminals, and determines the position of the short circuit point according to the detected resistance, so that the operation is simple, and the short circuit point is accurately positioned; on the other hand, when the short circuit point is detected, the invention does not need to damage the wiring or the display panel, is suitable for various grid driving circuits and has strong operability.
It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the invention, as claimed.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present disclosure and together with the description, serve to explain the principles of the disclosure. It is to be understood that the drawings in the following description are merely exemplary of the disclosure, and that other drawings may be derived from those drawings by one of ordinary skill in the art without the exercise of inventive faculty.
Fig. 1 is a schematic diagram of a GOA driving unit in the related art;
FIG. 2 is a schematic diagram of an overall structure of an exemplary embodiment of a gate driver circuit according to the present disclosure;
fig. 3 is a schematic structural diagram of a routing portion of an exemplary embodiment of a gate driving circuit in the disclosure;
FIG. 4 is an equivalent circuit diagram between two traces in an exemplary embodiment of a gate driver circuit according to the present disclosure;
fig. 5 is a flowchart illustrating an exemplary embodiment of a method for determining a short-circuit point of a gate line of a gate driving circuit according to the present disclosure.
Detailed Description
Example embodiments will now be described more fully with reference to the accompanying drawings. Example embodiments may, however, be embodied in many different forms and should not be construed as limited to the examples set forth herein; rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of example embodiments to those skilled in the art. The same reference numerals in the drawings denote the same or similar structures, and thus their detailed description will be omitted.
Although relative terms, such as "upper" and "lower," may be used in this specification to describe one element of an icon relative to another, these terms are used in this specification for convenience only, e.g., in accordance with the orientation of the examples described in the figures. It will be appreciated that if the device of the icon were turned upside down, the element described as "upper" would become the element "lower". Other relative terms, such as "high," "low," "top," "bottom," "left," "right," and the like are also intended to have similar meanings. When a structure is "on" another structure, it may mean that the structure is integrally formed with the other structure, or that the structure is "directly" disposed on the other structure, or that the structure is "indirectly" disposed on the other structure via another structure.
The terms "a," "an," "the," and the like are used to denote the presence of one or more elements/components/parts; the terms "comprising" and "having" are intended to be inclusive and mean that there may be additional elements/components/etc. other than the listed elements/components/etc.
In the related art, the principle of the GOA driving unit is shown in fig. 1, and the driving signal source 1 includes a voltage signal terminal VSS, a first clock signal terminal CLK, a second clock signal terminal CLKB, and a scanning signal terminal STV. The scanning signal terminal STV is connected to the INPUT terminal INPUT of the first stage shift register unit only, and the signal OUTPUT from the OUTPUT terminal OUTPUT of each stage shift register unit can be used as the INPUT signal of the INPUT terminal INPUT of the next stage shift register unit and simultaneously as the RESET signal of the RESET terminal RESET of the previous stage shift register unit. The voltage signal terminal VSS, the first clock signal terminal CLK, and the second clock signal terminal CLKB are connected to the VSS terminal, the CLK terminal, and the CLKB terminal of each shift register unit through the trace 2 (thick solid line). However, due to process limitations, short circuits between the traces 2 are likely to occur. In the related art, usually, a detection point is disposed at one end of the trace 2 close to the driving signal source or the shift register unit 3, and whether a short circuit occurs between the two traces can be determined by detecting a resistance between the detection points on the two traces. When the position of the short-circuit point needs to be determined, one end of one of the wires, which is far away from the detection points, is generally gradually cut off, and when the resistance between the two wire detection points is increased, the cut-off position is judged to be the short-circuit point.
The present exemplary embodiment first provides a gate driving circuit, as shown in fig. 2 and fig. 3, fig. 2 is a schematic overall structure diagram of an exemplary embodiment of the gate driving circuit in the present disclosure, and fig. 3 is a schematic structural diagram of a routing portion of an exemplary embodiment of the gate driving circuit in the present disclosure. The gate driving circuit comprises a plurality of wires 4 and a plurality of shift register units 5, wherein each shift register unit 5 is connected with the plurality of wires 4, and the gate driving circuit comprises: a plurality of detection switches 6 and a detection terminal 7. A plurality of detection switches 6 are respectively located between each of the traces 4 and each of the shift register units 5; the detection terminals 7 are respectively connected with two ends of each wire 4.
The gate driving circuit provided by the present disclosure includes: the detection switch is positioned between each wire and each shift register unit, and the detection terminals are positioned at two ends of each wire. On one hand, the short circuit detection device can detect whether the wiring is short-circuited or not by detecting the resistance between the detection terminals, and determines the position of the short circuit point according to the detected resistance, so that the operation is simple, and the short circuit point is accurately positioned; on the other hand, when the short circuit point is detected, the wiring or the display panel is not required to be damaged, the method is suitable for various grid driving circuits, and has strong operability.
In the present exemplary embodiment, two ends of the trace 4 are respectively one end close to the driving signal source and one end far away from the driving signal source. The two ends of the wire 4 are respectively connected with a detection terminal 7. The sensing terminals 7 may be integrated on the DP side (the side where the active driver is disposed is generally called the DP side) or the DPO side (the side opposite to the DP side) of the array substrate by a circuit board printing technique, and the sensing terminals 7 may provide sensing points for an external sensing device to sense the resistance between the respective sensing terminals.
In this exemplary embodiment, when it is required to detect whether a short circuit occurs between two wires 4 and the position of the short circuit point, the detection switch 6 located between each shift register unit 5 and the wire 4 is turned off, and the signal source is stopped from being driven to transmit signals, so that the resistance measured between the detection terminals 7 only includes the resistance of the wire 4 itself and the resistance of the short circuit point. The detection switch 6 can be selected as a TFT device, the drain of the TFT can be connected to the trace 4, the source of the TFT can be connected to the shift register unit 5, and the source and the drain of the TFT can be controlled to be turned on and off by inputting different voltage signals to the gate of the TFT. It should be understood that there are many more options for the detection switch 6 to cut off the connection between the trace 4 and the shift register unit 5, which are within the scope of the present disclosure.
As shown in fig. 3 and fig. 4, the exemplary embodiment takes the detection of a short circuit between a first trace to be tested 41 and a second trace to be tested 42 in a plurality of traces as an example. The first end 411 of the first trace 41 to be tested is connected to the first detecting terminal 71, the second end 412 of the first trace 41 to be tested is connected to the second detecting terminal 72, the first end 421 of the second trace 42 to be tested is connected to the third detecting terminal 73, and the second end 422 of the second trace 42 to be tested is connected to the fourth detecting terminal 74. When it is required to detect whether a short circuit occurs between the first trace 41 to be detected and the second trace 42 to be detected and the position of the short circuit, all the detection switches 6 located between the first trace 41 to be detected, the second trace 42 to be detected and the shift register unit 5 are turned off, and the driving signal source is stopped transmitting signals. At this time, the resistance measured between the two detection terminals on the same trace only includes the line resistance of the trace itself, and the resistance measured between the detection terminals on different traces only includes the line resistance of the two traces itself and the short-circuit resistance in the path. When the resistance between any one of the detection terminals connected to the first trace 41 to be detected and any one of the detection terminals connected to the second trace 42 to be detected is greater than the preset resistance, it is determined that the first trace 41 to be detected and the second trace 42 to be detected are not short-circuited. When the resistance between any detection terminal connected with the first wire to be detected and any detection terminal connected with the second wire to be detected is smaller than the preset resistance, it is determined that the first wire to be detected and the second wire to be detected are in short circuit. The preset resistance can be selected to be larger than the self resistance of the wire.
When a short circuit occurs between the first trace to be tested 41 and the second trace to be tested 42, as shown in fig. 4, the short circuit is an equivalent circuit diagram between the two traces in an exemplary embodiment of the gate driving circuit in the disclosure. Wherein a is the equivalent resistance of the line between the first end 411 of the first trace 41 to be tested and the short-circuit point, b is the equivalent resistance of the line between the first end 421 of the second trace 42 to be tested and the short-circuit point, c is the equivalent resistance of the line between the second end of the second trace to be tested and the short-circuit point, and d is the resistance of the short-circuit point. Detecting a resistance R1 between the first detection terminal 71 and the third detection terminal 73 as a + d + b; detecting a resistance R2 between the first detection terminal 71 and the fourth detection terminal 74 as a + d + c; the resistance R3 between the third detection terminal 73 and the fourth detection terminal 74 is detected as c + b. Wherein R1, R2, R3 are detectable values, according to R1 ═ a + d + b, R2 ═ a + d + c, R3 ═ c + b, can calculate to obtain b ═ R1-R2+ R3)/2, combine the equivalent resistance R3 and the second of the line between the first end and the second end of the second line of awaiting measuring to walk full length L and can calculate the length of the second line 42 of awaiting measuring from the first end 421 to the short-circuit point to be (b ═ R3)/L, thereby can confirm the position of the short-circuit point.
The present exemplary embodiment further provides a method for determining a short-circuit point of a gate line driving circuit, as shown in fig. 5, which is a flowchart of an exemplary embodiment of a method for determining a short-circuit point of a gate line driving circuit according to the present disclosure. The gate driving circuit comprises a plurality of wires, a detection switch is arranged between each wire and the shift register unit, and two ends of each wire are connected with detection terminals, the method comprises the following steps:
step S1: for a first wire to be tested and a second wire to be tested in the plurality of wires, the first wire to be tested, the second wire to be tested and the shift register unit are cut off through the detection switch;
step S2: detecting the resistance between the detection terminals at the two ends of the first wire to be detected and the second wire to be detected;
step S3: and judging whether the first to-be-detected wire and the second to-be-detected wire are short-circuited according to the detected resistance, and determining the position of a short-circuit point according to the resistance.
In this exemplary embodiment, the detecting the resistance between the detection terminals at the two ends of the first trace to be detected and the second trace to be detected includes:
detecting the resistance between a first detection terminal at the first end of the first wire to be detected and a third detection terminal at the first end of the second wire to be detected;
detecting the resistance between a first detection terminal at the first end of the first wire to be detected and a fourth detection terminal at the second end of the second wire to be detected;
and detecting the resistance between the third detection terminal of the first end of the second wire to be detected and the fourth detection terminal of the second end of the second wire to be detected.
The line resistance and the short-circuit resistance of the wiring are smaller, and when the resistance meter is used for direct measurement, the resistance of the wiring of the resistance meter can influence the measurement result. In the present exemplary embodiment, the resistance between the detection terminals is detected by kelvin four-wire detection method in the method. The Kelvin four-wire detection method specifically comprises the steps of inputting a stable current between two detection terminals by using a power supply, directly detecting the voltage between the two detection terminals by using a voltmeter, calculating the ratio of the voltage detected by the voltmeter to the stable current, and accurately obtaining the resistance between the two detection terminals, so as to avoid the influence of wiring of a measuring device on a measurement result.
In this exemplary embodiment, the determining whether the first trace to be tested and the second trace to be tested are short-circuited according to the detected resistance includes:
and if the resistance between the first detection terminal and the third detection terminal is smaller than a preset resistance, determining that the first to-be-detected wire and the second to-be-detected wire are short-circuited.
In this exemplary embodiment, determining the position of the short-circuit judgment point includes:
and determining the position of the short circuit point according to the equivalent resistance of the circuit between the first end of the second wire to be tested and the second end of the second wire to be tested, the equivalent resistance of the circuit between the first end of the second wire to be tested and the short circuit point and the total length of the second wire to be tested.
In an exemplary embodiment of the invention, calculating an equivalent resistance b of the line between the first end of the second trace to be tested and the short-circuit point according to b ═ R1-R2+ R3)/2;
wherein: r1 ═ a + d + b, R2 ═ a + d + c, R3 ═ c + b; a is an equivalent resistance of a line between the first end of the first wire to be tested and the short-circuit point, b is an equivalent resistance of a line between the first end of the second wire to be tested and the short-circuit point, c is an equivalent resistance of a line between the second end of the second wire to be tested and the short-circuit point, d is a short-circuit point resistance, R1 is a resistance between the first detection terminal and the third detection terminal, R2 is a resistance between the first detection terminal and the fourth detection terminal, and R3 is a resistance between the third detection terminal and the fourth detection terminal.
The present exemplary embodiment also provides a display panel including the gate driving circuit described above. The display panel has the same technical features and working principles as those of the gate driving circuit, and the details have been already described, and are not repeated herein.
Other embodiments of the invention will be apparent to those skilled in the art from consideration of the specification and practice of the invention disclosed herein. This application is intended to cover any variations, uses, or adaptations of the invention following, in general, the principles of the invention and including such departures from the present disclosure as come within known or customary practice within the art to which the invention pertains. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the invention being indicated by the following claims.
The described features, structures, or characteristics may be combined in any suitable manner in one or more embodiments, and the features discussed in connection with the embodiments are interchangeable, if possible. In the above description, numerous specific details are provided to give a thorough understanding of embodiments of the invention. One skilled in the relevant art will recognize, however, that the invention may be practiced without one or more of the specific details, or with other methods, components, materials, and so forth. In other instances, well-known structures, materials, or operations are not shown or described in detail to avoid obscuring aspects of the invention.
Claims (6)
1. A gate driving circuit includes a plurality of wirings and a plurality of shift register units, each of the shift register units is connected with the plurality of wirings, and the gate driving circuit includes:
the detection switches are respectively positioned between each routing wire and each shift register unit;
and the two ends of each wiring are connected with the detection terminals.
2. A gate drive circuit as claimed in claim 1, wherein the detection switch is a thin film transistor.
3. The gate driving circuit according to claim 1, wherein the detection terminal is located on a DPO side or a DP side of the array substrate on which the gate driving circuit is located.
4. A method for determining a short circuit point of a gate drive circuit wiring, wherein the gate drive circuit includes a plurality of wirings, a detection switch is arranged between each wiring and each shift register unit, and two ends of each wiring are connected with detection terminals, the method comprises the following steps:
for a first wire to be tested and a second wire to be tested in the plurality of wires, the first wire to be tested, the second wire to be tested and the shift register unit are cut off through the detection switch;
detecting the resistance between the detection terminals at the two ends of the first wire to be detected and the second wire to be detected;
judging whether the first to-be-detected wire and the second to-be-detected wire are short-circuited according to the detected resistance, and determining the position of a short-circuit point according to the resistance;
the detecting the resistance between the detection terminals at the two ends of the first wire to be detected and the second wire to be detected comprises:
detecting the resistance between a first detection terminal at the first end of the first wire to be detected and a third detection terminal at the first end of the second wire to be detected;
detecting the resistance between a first detection terminal at the first end of the first wire to be detected and a fourth detection terminal at the second end of the second wire to be detected;
detecting the resistance between a third detection terminal of the first end of the second wire to be detected and a fourth detection terminal of the second end of the second wire to be detected;
the judging whether the first to-be-detected wire and the second to-be-detected wire are short-circuited according to the detected resistance comprises the following steps:
if the resistance between the first detection terminal and the third detection terminal is smaller than a preset resistance, determining that the first to-be-detected wire and the second to-be-detected wire are in a short circuit;
determining the location of the short circuit point comprises:
determining the position of the short circuit point according to the equivalent resistance of the circuit between the first end of the second wire to be tested and the second end of the second wire to be tested, the equivalent resistance of the circuit between the first end of the second wire to be tested and the short circuit point and the total length of the second wire to be tested;
calculating the equivalent resistance b of the line between the first end of the second wire to be tested and the short-circuit point according to the b-value (R1-R2+ R3)/2;
wherein: r1 ═ a + d + b, R2 ═ a + d + c, R3 ═ c + b; a is an equivalent resistance of a line between the first end of the first wire to be tested and the short-circuit point, c is an equivalent resistance of a line between the second end of the second wire to be tested and the short-circuit point, d is a short-circuit point resistance, R1 is a resistance between the first detection terminal and the third detection terminal, R2 is a resistance between the first detection terminal and the fourth detection terminal, and R3 is a resistance between the third detection terminal and the fourth detection terminal.
5. The method for determining the trace short-circuit point of the gate driving circuit according to claim 4, wherein the resistance between the detection terminals is detected by using a Kelvin four-wire detection method.
6. A display panel comprising the gate driver circuit according to any one of claims 1 to 3.
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| CN108877610B (en) * | 2018-07-10 | 2021-09-03 | 京东方科技集团股份有限公司 | Array substrate, detection method thereof and display device |
| CN109102768B (en) * | 2018-09-26 | 2022-01-28 | 京东方科技集团股份有限公司 | Array substrate mother board and detection method thereof |
| CN109448618B (en) * | 2018-12-25 | 2022-03-25 | 武汉天马微电子有限公司 | Display panel, display device and driving method of display device |
| CN111445841B (en) * | 2020-05-14 | 2022-04-08 | 京东方科技集团股份有限公司 | Display device and detection method thereof |
| TWI795971B (en) * | 2021-10-29 | 2023-03-11 | 友達光電股份有限公司 | Detection device and detection method |
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| CN103217844B (en) * | 2013-04-01 | 2015-06-24 | 合肥京东方光电科技有限公司 | Display panel and display device |
| JP2014202907A (en) * | 2013-04-04 | 2014-10-27 | 株式会社ジャパンディスプレイ | Planar display device and inspection method of the same |
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