CN113466252B - Display panel, detection method of display panel and display device - Google Patents
Display panel, detection method of display panel and display device Download PDFInfo
- Publication number
- CN113466252B CN113466252B CN202010238315.5A CN202010238315A CN113466252B CN 113466252 B CN113466252 B CN 113466252B CN 202010238315 A CN202010238315 A CN 202010238315A CN 113466252 B CN113466252 B CN 113466252B
- Authority
- CN
- China
- Prior art keywords
- display panel
- signal line
- transistor
- line
- electrically connected
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/84—Systems specially adapted for particular applications
- G01N21/88—Investigating the presence of flaws or contamination
- G01N21/95—Investigating the presence of flaws or contamination characterised by the material or shape of the object to be examined
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/01—Arrangements or apparatus for facilitating the optical investigation
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/01—Arrangements or apparatus for facilitating the optical investigation
- G01N2021/0106—General arrangement of respective parts
- G01N2021/0112—Apparatus in one mechanical, optical or electronic block
Landscapes
- Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Devices For Indicating Variable Information By Combining Individual Elements (AREA)
- Electroluminescent Light Sources (AREA)
Abstract
The invention discloses a display panel, a detection method of the display panel and a display device. The display panel includes at least one hole region, a display region surrounding the hole region, and a non-display region surrounding the display region; the display area comprises a power signal line and at least one detection line; the second power supply signal wires extend along one side of one hole area respectively, the detection wires are arranged around the one hole area respectively, and at the same hole area, the first power supply signal wires are electrically connected with the first ends of the detection wires, and the second ends of the detection wires are electrically connected with the second power supply signal wires; the non-display area comprises a crack detection circuit, the input end of the crack detection circuit is electrically connected with the second power signal line, the control end of the crack detection circuit is electrically connected with the first control signal line, and each output end of the crack detection circuit is respectively and correspondingly electrically connected with the first data line of the display panel. The accuracy of crack detection can be improved, the display effect of the display panel is ensured, and the manufacturing cost of the display panel is reduced.
Description
Technical Field
The embodiment of the invention relates to the technical field of display, in particular to a display panel, a detection method of the display panel and a display device.
Background
Current display panels are evolving towards full-screen displays. In a full screen, the display area needs to be provided with openings for placing cameras and other structures. However, when the display area is perforated, film cracks are likely to occur, and the reliability of the display panel is reduced.
Disclosure of Invention
The invention provides a display panel, a detection method of the display panel and a display device, which can improve the reliability of the display panel on the basis of not influencing the pixel arrangement of the display panel, and is beneficial to reducing the manufacturing cost of the display panel.
In a first aspect, embodiments of the present invention provide a display panel including at least one aperture region, a display region surrounding the aperture region, and a non-display region surrounding the display region;
The display area comprises a power supply signal line and at least one detection line, wherein the power supply signal line comprises at least one first power supply signal line and at least one second power supply signal line; each second power signal line extends along one side of one hole area respectively, each detection line is arranged around one hole area respectively, at the same hole area, the first power signal line is electrically connected with the first end of the detection line, and the second end of the detection line is electrically connected with the second power signal line; the first direction is the extending direction of the data line in the display panel;
The non-display area comprises a crack detection circuit, the input end of the crack detection circuit is electrically connected with the second power signal line, the control end of the crack detection circuit is electrically connected with the first control signal line of the display panel, and each output end of the crack detection circuit is respectively and correspondingly electrically connected with the first data lines of the display panel one by one, wherein the first data lines comprise at least two data lines.
Optionally, the detection line and the power signal line are arranged in the same layer.
Optionally, the detection line includes at least two metal wires, at least two metal wires are arranged in different layers, and at least two metal wires are arranged in parallel;
Preferably, each of the metal traces is disposed in the same layer as one metal layer of the display panel.
Optionally, along the first direction, the display panel includes a first frame and a second frame; the distance from the hole area to the first frame is smaller than the distance from the hole area to the second frame; the second power signal line is arranged at one side of the hole area, which is far away from the second frame.
Optionally, the length of the second power signal line is smaller than the length of the first power signal line along the first direction.
Optionally, the crack detection circuit comprises at least two first transistors; the gate of the first transistor is used as a control end of the crack detection circuit, the first pole of the first transistor is used as an input end of the crack detection circuit, and the second pole of each first transistor is used as an output end of the crack detection circuit.
Optionally, the display panel further includes a second transistor, a third transistor, and a plurality of fourth transistors; the input end of the crack detection circuit is electrically connected with the second power signal line through the second transistor;
The grid electrode of the second transistor is electrically connected with the first detection control signal line of the display panel, the first electrode of the second transistor is electrically connected with the second power supply signal line, and the second electrode of the second transistor is electrically connected with the first electrode of the first transistor and the first electrode of the third transistor; a gate of the third transistor is electrically connected to a second detection control signal line of the display panel, and a second electrode of the third transistor is electrically connected to a detection signal line of the display panel and a first electrode of the fourth transistor; the grid electrode of the fourth transistor is electrically connected with the first control signal line, and the second pole of the fourth transistor is respectively and correspondingly electrically connected with the second data line of the display panel, wherein the second data line is a data line except the first data line.
Optionally, the aperture region comprises two; the detection line, the first power supply signal line and the second power supply signal line are two; the two first power supply signal lines are in contact.
In a second aspect, an embodiment of the present invention provides a method for detecting a display panel, where the method is used for detecting the display panel provided by any embodiment of the present invention; comprising the following steps:
Providing a power signal to a crack detection circuit of the display panel; and the crack detection circuit controls whether the pixel unit corresponding to the first data line of the display panel emits light or not according to the power signal.
In a third aspect, an embodiment of the present invention provides a display device, including a display panel provided in any embodiment of the present invention.
According to the technical scheme, the power signal wire and the detection wire are arranged in the display area of the display panel, the power signal wire comprises a first power signal wire and a second power signal wire, each second power signal wire extends along one side of one hole area along the first direction, each detection wire is arranged around one hole area, the first power signal wire is electrically connected with the first end of the detection wire at the same hole area, the second end of the detection wire is electrically connected with the second power signal wire, and the second power signal wire is electrically connected with the crack detection circuit. When the pixel units connected with the first data line and the pixel units connected with the second power supply signal line are abnormal, the situation that the pixel units connected with the first data line or the pixel units connected with the second power supply signal line are abnormal due to other factors is discharged, and the accuracy of crack detection is improved. In addition, the power signal line and the detection line are arranged to provide detection signals for the crack detection circuit, so that crack detection around the hole area is realized, and no metal wiring is required to be additionally arranged on a metal layer where the scanning signal line or the data signal line is arranged, thereby improving the reliability of the display panel on the basis of not influencing the pixel arrangement of the display panel and ensuring the display effect of the display panel. Meanwhile, crack detection of the display panel can be completed before the touch control process is finished, so that the manufacturing cost of the display panel is reduced.
Drawings
Fig. 1 is a schematic structural diagram of a display panel according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of another display panel according to an embodiment of the present invention;
fig. 3 is a schematic structural diagram of another display panel according to an embodiment of the present invention;
fig. 4 is a schematic structural diagram of another display panel according to an embodiment of the present invention;
fig. 5 is a schematic structural diagram of another display panel according to an embodiment of the present invention;
fig. 6 is a flow chart of a method for detecting a display panel according to an embodiment of the present invention;
fig. 7 is a schematic structural diagram of a display device according to an embodiment of the present invention.
Detailed Description
The invention is described in further detail below with reference to the drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting thereof. It should be further noted that, for convenience of description, only some, but not all of the structures related to the present invention are shown in the drawings.
When manufacturing an Organic LIGHT EMITTING Diode (OLED) display panel, an array substrate is manufactured, and then an OLED is formed on the array substrate by vapor deposition. And opening holes after the OLED is formed by evaporation, and removing an OLED film layer corresponding to the hole area by adopting laser. In addition, after the polarizer is formed in the later stage, the array substrate corresponding to the hole area is removed by adopting laser, so that a complete hole area is formed. In the process of removing the OLED film layer and the array substrate by laser, the film layer cracks can be caused in the display area around the hole area, so that abnormal display of the display area is caused or the reliability of the display panel is reduced. In the prior art, a metal wire can be additionally arranged on a metal layer where the scanning signal wire or the data signal wire is positioned for detecting cracks. However, the additional arrangement of the metal traces increases the area occupied by the metal traces on the display panel, thereby affecting the pixel arrangement of the display panel. And the distance between the pixels is different from that of the normal display area, which reduces the display effect of the display panel. In addition, a metal wire can be arranged on the touch control layer for detecting cracks. At this time, crack detection can only be performed after the process of the touch layer is completed, and if cracks are detected, the production cost for manufacturing the touch layer is increased, which is not beneficial to reducing the manufacturing cost of the display panel.
Aiming at the technical problems, the embodiment of the invention provides a display panel. Fig. 1 is a schematic structural diagram of a display panel according to an embodiment of the present invention. As shown in fig. 1, the display panel includes at least one hole region 110, a display region 120 surrounding the hole region 110, and a non-display region 130 surrounding the display region 120; the display area 120 includes a power signal line 121 and at least one detection line 122, the power signal line 121 including at least one first power signal line 1211 and at least one second power signal line 1212; along the first direction X, each second power signal line 1212 extends along one side of one hole region 110, each detection line 122 is disposed around one hole region 110, and at the same hole region 110, the first power signal line 1211 is electrically connected to a first end of the detection line 122, and a second end of the detection line 122 is electrically connected to the second power signal line 1212; the first direction X is an extending direction of the data line 123 in the display panel; the non-display area 130 includes a crack detection circuit 131, an input terminal in of the crack detection circuit 131 is electrically connected to the second power signal line 1212, a control terminal ctrl of the crack detection circuit 131 is electrically connected to the first control signal line 132 of the display panel, and each output terminal out of the crack detection circuit 131 is electrically connected to the first data line 1231 of the display panel in a one-to-one correspondence, wherein the first data line 1231 includes at least two data lines 123.
Specifically, the hole region 110 may be a through hole or a blind hole. The through holes are holes penetrating through the array substrate, and the blind holes are holes reserved outside the substrate in the array substrate. The power supply signal line 121 may be a high-level signal line for supplying a positive voltage to the pixel circuit. Illustratively, the power signal line 121 in the display panel includes a first power signal line 1211, a second power signal line 1212, and a third power signal line 1213, the first power signal line 1211 and the third power signal line 1213 being electrically connected, and a power signal may be supplied to a pixel unit electrically connected to the first power signal line 1211 and the third power signal line 1213. The second power signal line 1212 is electrically connected to the first power signal line 1211 through the detection line 122, thereby providing a power signal to the pixel unit electrically connected thereto. The power signal lines 121 may be arranged in a staggered manner in a horizontal and vertical direction, so that voltage signals provided to the pixel units of the display panel are relatively uniform, and thus display uniformity of the display panel may be improved. The detection lines 122 are disposed around the hole region 110. Fig. 1 exemplarily shows that the display panel includes one hole region 110, the corresponding display region 120 may include one detection line 122, and the power signal line 121 may include one first power signal line 1211 and one second power signal line 1212. When there is no crack around the hole region 110, the detection line 122 is not broken, and the power signal on the first power signal line 1211 may be transmitted to the second power signal line 1212 through the detection line 122. When a crack exists around the hole area 110, the detection line 122 may break, and the resistance of the detection line 122 is relatively large, that is, the voltage drop is relatively large when the power signal on the first power signal line 1211 is transmitted to the detection line 122, and the voltage of the power signal received by the second power signal line 1212 is relatively low.
The second power signal line 1212 is electrically connected to the input terminal in of the crack detection circuit 131. During the detection, conduction between the input terminal in and the output terminal out of the crack detection circuit 131 is controlled. When there is no crack around the hole region 110, the second power signal line 1212 outputs the power signal transmitted by the first power signal line 1211 to the crack detection circuit 131, and the crack detection circuit 131 outputs the power signal to the first data line 1231 such that the pixel cell connected to the first data line 1231 inputs a high-level signal, and when the driving transistor is a P-type transistor among the pixel cells on the display panel, the pixel cell connected to the first data line 1231 on the display panel is displayed as a 0 gray scale, is displayed as a black screen, and the display panel is not abnormal. Meanwhile, the pixel unit connected to the second power signal line 1212 may emit light, and the display region 120 around the hole region 110 may be normally displayed. When there is a crack around the hole region 110, the voltage drop is large when the power signal on the first power signal line 1211 passes through the detection line 122, the voltage is relatively low when it is transmitted to the second power signal line 1212, and the pixel cell connected to the second power signal line 1212 inputs a signal of relatively low voltage, so that the pixel cell connected to the second power signal line 1212 cannot normally emit light. Meanwhile, the second power signal line 1212 outputs a signal with a relatively low voltage to the crack detection circuit 131, so that the first data line 1231 connected to the crack detection circuit 131 does not input a high-level signal, the pixel unit connected to the first data line 1231 displays a non-black screen, and the pixel unit emits light, so that the display panel is bright and abnormal. Illustratively, the pixel unit connected to the first data line 1231 is a green pixel unit, and when there is no crack around the hole area 110, the green pixel unit connected to the first data line 1231 displays a black screen, while the pixel unit connected to the second power signal line 1212 may be displayed normally, and the display panel is not abnormal. When a crack exists around the hole region 110, the green pixel unit connected to the first data line 1231 is displayed as green, i.e., a green line appears in the display panel, while the pixel unit connected to the second power signal line 1212 cannot be displayed normally, and the display panel is abnormal. It is thereby possible to determine whether or not a crack exists around the hole region 110 based on the display of the pixel cell connected to the second power signal line 1212 and the pixel cell connected to the first data line 1231. In addition, when the pixel unit connected to the first data line 1231 and the pixel unit connected to the second power signal line 1212 are abnormal at the same time, it is determined that a crack exists around the hole area 110, and further, the situation that the pixel unit connected to the first data line 1231 or the pixel unit connected to the second power signal line 1212 is abnormal due to other factors is further discharged, so that the accuracy of crack detection is increased.
In addition, according to the technical scheme of the embodiment, the power signal line 121 and the detection line 122 are arranged to provide detection signals for the crack detection circuit 131, and no metal wiring is required to be additionally arranged on the metal layer where the scanning signal line or the data signal line is located, so that the reliability of the display panel can be improved on the basis that the pixel arrangement of the display panel is not affected, and the display effect of the display panel is ensured. Meanwhile, crack detection of the display panel can be completed before the touch control process is finished, so that the manufacturing cost of the display panel is reduced.
It should be noted that the detection line may be disposed in an additional metal layer of the display panel, or may be disposed in any metal layer of the display panel. The first data line 1231 includes at least two data lines 123, so that at least two columns of pixel units are used for detecting cracks around the hole area 110, which can reduce display abnormality caused by other factors from being judged as cracks, and improve the reliability of crack detection. In other embodiments, the first data line 1231 may further include a plurality of data lines 123, for example, may include 4 data lines 123 or 6 data lines 123, and may further improve the reliability of crack detection.
Alternatively, the detection line and the power signal line may be arranged in the same layer.
Specifically, the detection line and the first power signal line and the second power signal line are arranged on the same layer, so that the detection line can be formed simultaneously with the first power signal line and the second power signal line through the same mask plate, and can be contacted with the first power signal line and the second power signal line through the mask plate, so that the electric connection of the detection line and the first power signal line and the second power signal line is directly realized, the manufacturing process flow of the display panel is reduced, and the manufacturing difficulty of the display panel is reduced.
Optionally, the detection line includes at least two metal wires, the at least two metal wires are arranged in different layers, and the at least two metal wires are arranged in parallel.
Specifically, the detection line comprises at least two parallel metal wires, so that impedance on the detection line can be reduced, and when a power signal on the first power signal line is transmitted to the second power signal line through the detection line, the power signal can be prevented from having larger voltage drop, thereby being beneficial to improving the display uniformity of the display panel. In addition, the two metal wires connected in parallel may be disposed in different layers, and preferably, perpendicular projections of at least two metal wires in the thickness direction of the display panel may coincide. At the moment, not only can the impedance of the detection line be reduced, but also the detection line can be prevented from occupying a larger area of the display panel, and the pixel arrangement of the display panel is facilitated.
Preferably, each metal wire and one metal layer of the display panel are arranged in the same layer, so that the extra increase of the manufacturing process flow of the display panel can be avoided, and the manufacturing cost of the display panel can be reduced.
Fig. 2 is a schematic structural diagram of another display panel according to an embodiment of the invention. As shown in fig. 2, along a first direction X, the display panel includes a first bezel 140 and a second bezel 150; the distance from the hole area 110 to the first frame 140 is smaller than the distance from the hole area 110 to the second frame 150; the second power signal line 1212 is disposed on a side of the hole region 110 away from the second frame 150.
Specifically, when the first power signal line 1211 supplies the power signal to the second power signal line 1212 through the detection line 122, the impedance of the detection line 122 affects the magnitude of the power signal, so that the power signal on the second power signal line 1212 has a certain difference from the power signal on the first power signal line 1211, and thus the uniformity of the display of the pixel cell connected to the second power signal line 1212 and the pixel cell connected to the first power signal line 1211 is relatively poor. As shown in fig. 2, the second power signal line 1212 is disposed at a side of the bezel where the hole area 110 is relatively close to the bezel, so that the length of the second power signal line 1212 along the first direction X is relatively small, and the number of pixel cells in the same column connected to the second power signal line 1212 is relatively small, so that the influence of the detection line 122 on the uniformity of the display panel can be reduced as much as possible.
Alternatively, the length of the second power signal line 1212 is smaller than the length of the first power signal line 1211 along the first direction X.
Specifically, the second power signal line 1212 and the first power signal line 1211 may be the power signal lines 121 corresponding to two adjacent columns of pixel circuits. The distances from the different positions of the hole region 110 to the first frame 140 are not equal along the first direction X, and thus the lengths of the first power signal line 1211 and the second power signal line 1212 are not equal. By selecting the power signal line 121 corresponding to the position where the distance from the hole region 110 to the first frame 140 is relatively short as the second power signal line 1212, the length of the second power signal line 1212 is smaller than the length of the first power signal line 1211, and the number of pixel units connected to the second power signal line 1212 can be reduced, so that the influence of the detection line 122 on the uniformity of the display panel can be further reduced.
Preferably, the power signal lines 121 corresponding to the positions of the hole regions 110 having the shortest distance to the first frame 140 are used as the second power signal lines 1212, so that the number of pixel units connected to the second power signal lines 1212 is minimized, and the influence of the detection lines 122 on the uniformity of the display panel is minimized.
Fig. 3 is a schematic structural diagram of another display panel according to an embodiment of the invention. As shown in fig. 3, the crack detection circuit 131 includes at least two first transistors T1; the gate of the first transistor T1 serves as the control terminal ctrl of the crack detection circuit 131, the first pole of the first transistor T1 serves as the input terminal in of the crack detection circuit 131, and the second pole of each first transistor T1 serves as one output terminal out of the crack detection circuit 131.
Specifically, the first transistor T1 may be a P-type transistor or an N-type transistor, and the crack detection circuit 131 is exemplarily shown in fig. 3 to include 2 first transistors T1, and the first transistors T1 are P-type transistors. As shown in fig. 3, the gate of the first transistor T1 is electrically connected to the first control signal line 132, the first pole of the first transistor T1 is electrically connected to the second power signal line 1212, and the second pole of the first transistor T1 is electrically connected to the first data line 1231. When the crack detection circuit 131 includes 2 first transistors T1, the corresponding first data line 1231 includes 2 data lines 123. When the display panel detects cracks, the first control signal line 132 outputs a low level to control the first transistor T1 to be turned on. When there is no crack around the hole region 110, the second power signal line 1212 outputs a power signal and outputs the power signal onto the first data line 1231 through the first transistor T1, and the pixel unit connected to the first data line 1231 inputs a high-level signal, and displays a black screen, and the display panel is free from abnormalities. Meanwhile, the pixel unit connected to the second power signal line 1212 may be supplied with a power voltage, the pixel unit may normally emit light, and the display area 120 around the hole area 110 may normally display. When a crack exists around the hole area 110, the voltage drop on the detection line 122 is large, the signal output by the second power signal line 1212 is smaller than the power signal, and the signal is output to the first data line 1231 through the first transistor T1, and the pixel unit connected to the first data line 1231 inputs a signal, and emits light, so that the display panel has a bright line and is abnormal in display. Meanwhile, the voltage of the power signal supplied to the pixel unit connected to the second power signal line 1212 is relatively small, the pixel unit cannot normally emit light, and the display area 120 around the hole area 110 may display an abnormality.
It should be noted that, when the first transistor T1 is an N-type transistor, the first control signal line 132 outputs a high level to control the first transistor T1 to be turned on during the crack detection of the display panel, and the specific operation process is the same as the above process, and will not be repeated here.
Fig. 4 is a schematic structural diagram of another display panel according to an embodiment of the invention. As shown in fig. 4, the display panel further includes a second transistor T2, a third transistor T3, and a plurality of fourth transistors T4; the input terminal in of the crack detection circuit 131 is electrically connected to the second power supply signal line 1212 through the second transistor T2; the gate of the second transistor T2 is electrically connected to the first detection control signal line 160 of the display panel, the first pole of the second transistor T2 is electrically connected to the second power signal line 1212, and the second pole of the second transistor T2 is electrically connected to the first pole of the first transistor T1 and the first pole of the third transistor T3; the gate of the third transistor T3 is electrically connected to the second detection control signal line 170 of the display panel, and the second electrode of the third transistor T3 is electrically connected to the detection signal line 180 of the display panel and the first electrode of the fourth transistor T4; the gate of the fourth transistor T4 is electrically connected to the first control signal line 132, and the second poles of the fourth transistor T4 are respectively electrically connected to the second data lines 1232 of the display panel in a one-to-one correspondence manner, wherein the second data lines 1232 are the data lines 123 other than the first data lines 1231.
Specifically, the second transistor T2 and the third transistor T3 may constitute a gating unit for selecting a signal inputted to the first electrode of the first transistor T1. When the second transistor T2 is turned on and the third transistor T3 is turned off, the first electrode of the first transistor T1 inputs a signal on the second power signal line 1212. When the second transistor T2 is turned off and the third transistor T3 is turned on, the first electrode of the first transistor T1 inputs the detection signal supplied from the detection signal line 180. Therefore, in performing panel detection on the display panel, the second transistor T2 may be set to be turned off and the third transistor T3 may be set to be turned on, so that the first transistor T1 is used to detect the pixel unit connected to the first data line 1231. When the display panel performs crack detection, the second transistor T2 may be set to be turned on and the third transistor T3 may be turned off, so that the first transistor T1 is used to detect whether a crack exists around the hole region 110. Therefore, the first transistor T1 may be multiplexed in the panel detection and the crack detection, so that the area of the panel detection circuit and the crack detection circuit 131 occupying the display panel may be reduced, which may not only reduce the manufacturing cost of the display panel, but also facilitate the design of a narrow frame of the display panel.
The detection signal provided by the detection signal line 180 is further output to the first pole of the fourth transistor T4, for providing the detection signal to the fourth transistor T4, the fourth transistor T4 outputs the detection signal to the second data line 1232 electrically connected thereto, and the pixel unit connected to the second data line 1232 is displayed under the detection signal. For example, the detection signal provided by the detection signal line 180 may be at a high level, and when the panel is detected, the pixel unit is displayed as a black screen under the action of the high level, the display panel is displayed normally, and when the pixel unit has a bright point and/or a bright line under the action of the high level, the display panel is displayed abnormally.
The display panel may include a plurality of fourth transistors T4, the second poles of the first transistors T1 and the second poles of the fourth transistors T4 are electrically connected to the first data lines 1231 and the second data lines 1232 in a one-to-one correspondence, respectively, and the first data lines 1231 and the second data lines 1232 constitute the data lines 123 of the display panel, so that panel detection of the display panel may be achieved.
Illustratively, 2 first transistors T1 and 4 fourth transistors T4 are included in fig. 4. The first transistor T1 and the fourth transistor T4 are illustratively P-type transistors, and the second transistor T2 and the third transistor T3 are illustratively N-type transistors. In the panel detection process, the first detection signal output by the first detection signal line 160 is at a low level, the second detection signal output by the second detection signal line 170 is at a high level, the second transistor T2 is turned off, the third transistor T3 is turned on, and the first transistor T1 and the fourth transistor T4 input detection signals provided by the detection signal line 180 to detect pixel units in all columns of the display panel. In the crack detection process, the first detection signal outputted from the first detection signal line 160 is at a high level, the second detection signal outputted from the second detection signal line 170 is at a low level, the second transistor T2 is turned on, the third transistor T3 is turned off, and the first transistor T1 inputs the signal of the second power signal line 1212, and at this time, the first transistor T1 is used to detect whether a crack exists around the hole region 110. Therefore, the first transistor T1 can be multiplexed in the panel detection and the crack detection, and when the display panel includes the panel detection circuit, the crack detection can be realized on the basis of the panel detection by setting the gate unit composed of the second transistor T2 and the third transistor T3 on the basis of the panel detection circuit without additionally setting the first transistor T1. Therefore, the area of the display panel occupied by the panel detection circuit and the crack detection circuit can be reduced, the manufacturing cost of the display panel can be reduced, and the narrow frame design of the display panel is facilitated.
It should be noted that the types of the first transistor T1, the second transistor T2, the third transistor T3, and the fourth transistor T4 in the above embodiment are only examples, and are not limited. In other embodiments, the first transistor T1 and the fourth transistor T4 may be N-type transistors, and the second transistor T2 and the third transistor T3 may be P-type transistors, so that the levels of the first control signal line 132, the first detection signal line 160 and the second detection signal line 170 may be adaptively modified to be turned on or turned off.
Fig. 5 is a schematic structural diagram of another display panel according to an embodiment of the invention. As shown in fig. 5, the aperture region 110 includes two; the detection line 122, the first power signal line 1211, and the second power signal line 1212 are two; two first power signal lines 1211 are in contact.
Specifically, when the display panel includes a plurality of hole regions 110, crack detection needs to be performed around each hole region 110. Illustratively, the display panel shown in fig. 5 includes two hole regions 110, a second power signal line 1212 is disposed around each of the hole regions 110, and one end of the second power signal line 1212 is electrically connected to the first power signal line 1211 through the inspection line 122 for acquiring a power signal, and the other end of the second power signal line 1212 is electrically connected to the crack detection circuit 131 for outputting a signal for inspection. The detection of each hole area 110 is the same as the detection of the display panel including one hole area 110, and will not be described here.
In addition, the two first power signal wires can be contacted to realize electric connection, so that the process difficulty of manufacturing the power signal wires can be reduced.
In other embodiments, when the hole region includes two, the display panel further includes a second transistor, a third transistor, and a fourth transistor, each of the second transistor and the third transistor may include two, and one hole region corresponds to one of the second transistor and the third transistor, respectively. The gate of the second transistor is electrically connected to the first detection control signal line, the first pole of the second transistor is electrically connected to the second power supply signal, and the second pole of the second transistor is electrically connected to the first pole of the first transistor corresponding to the hole region and the first pole of the corresponding third transistor. The gate of the third transistor is electrically connected to the second detection control signal line, and the second electrode of the third transistor is electrically connected to the detection signal line and the first electrode of the fourth transistor. Therefore, the first transistor, the second transistor and the third transistor corresponding to one hole region can detect cracks around the corresponding hole region respectively, and when cracks exist in different hole regions, different regions of the display panel have bright line anomalies. In addition, the first transistor, the second transistor, the third transistor and the fourth transistor can realize panel detection of the display panel, and the specific process is the same as the panel detection in the case of one hole area, and will not be described here again.
The embodiment of the invention also provides a detection method of the display panel, which is used for detecting the display panel provided by any embodiment of the invention. Fig. 6 is a flowchart of a method for detecting a display panel according to an embodiment of the present invention. As shown in fig. 6, the method includes:
S60, providing a power supply signal to a crack detection circuit of the display panel; the crack detection circuit controls whether the pixel unit corresponding to the first data line of the display panel emits light or not according to the power supply signal.
Specifically, when no crack exists around the hole area, the voltage drop of the power supply signal passing through the detection line is smaller, the power supply signal received by the crack detection circuit is at a high level, the pixel unit connected with the first data line displays a high-level picture as a black picture, the display panel is not abnormal, and the pixel unit connected with the second power supply signal line can normally emit light. When cracks exist around the hole area, the voltage drop is relatively large when the power supply signal passes through the detection line, the voltage signal received by the crack detection circuit is not at a high level, the pixel unit connected with the first data line displays a black picture, the display panel has bright lines, and the display is abnormal. Meanwhile, the power supply signal voltage of the pixel unit connected with the second power supply signal line is lower, and normal light emission is not possible. Thereby enabling detection of cracks.
According to the technical scheme, the power signal line and the detection line are arranged to provide detection signals for the crack detection circuit, and the metal wiring is not required to be additionally arranged on the metal layer where the scanning signal line or the data signal line is arranged, so that the reliability of the display panel can be improved on the basis that the pixel arrangement of the display panel is not affected, and the display effect of the display panel is guaranteed. Meanwhile, crack detection of the display panel can be completed before the touch control process is finished, so that the manufacturing cost of the display panel is reduced.
On the basis of the technical scheme, when the crack detection circuit comprises at least two first transistors, and the display panel further comprises a second transistor, a third transistor and a plurality of fourth transistors, the display panel can perform panel detection and crack detection. When the panel detection is performed, the second transistor is controlled to be turned off, the third transistor is turned on, and the first transistor and the fourth transistor are used for realizing the panel detection of the display panel. When crack detection is performed, the second transistor is turned on, the third transistor is turned off, and the first transistor is used for realizing crack detection around the hole region. The display panel can realize multiplexing of the first transistor in panel detection and crack detection, so that the area of the display panel occupied by the crack detection circuit can be reduced, the manufacturing cost of the display panel can be reduced, and the narrow frame design of the display panel is facilitated.
The embodiment of the invention also provides a display device. Fig. 7 is a schematic structural diagram of a display device according to an embodiment of the present invention. As shown in fig. 7, the display device 200 includes a display panel 210 according to any embodiment of the present invention.
Note that the above is only a preferred embodiment of the present invention and the technical principle applied. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, but is capable of various obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the invention. Therefore, while the invention has been described in connection with the above embodiments, the invention is not limited to the embodiments, but may be embodied in many other equivalent forms without departing from the spirit or scope of the invention, which is set forth in the following claims.
Claims (11)
1. A display panel comprising at least one aperture region, a display region surrounding said aperture region, and a non-display region surrounding said display region;
The display area comprises a power supply signal line and at least one detection line, wherein the power supply signal line comprises at least one first power supply signal line and at least one second power supply signal line; each second power signal line extends along one side of one hole area respectively, each detection line is arranged around one hole area respectively, at the same hole area, the first power signal line is electrically connected with the first end of the detection line, and the second end of the detection line is electrically connected with the second power signal line; the first direction is the extending direction of the data line in the display panel;
The non-display area comprises a crack detection circuit, the input end of the crack detection circuit is electrically connected with the second power signal line, the control end of the crack detection circuit is electrically connected with a first control signal line of the display panel, and each output end of the crack detection circuit is respectively and correspondingly electrically connected with a first data line of the display panel, wherein the first data line comprises at least two data lines;
When no crack exists around the hole area, the pixel unit connected with the second power signal line normally emits light; the pixel units connected with the first data lines are displayed as black pictures, and the display panel is free of abnormality;
When cracks exist around the hole area, the detection line is broken, and the pixel units connected with the second power supply signal line cannot normally emit light; the display of the pixel units connected with the first data line is not a black picture, the pixel units emit light, a bright line appears on the display panel, and the display is abnormal;
And judging that cracks exist around the hole area when the pixel units connected with the first data line and the pixel units connected with the second power supply signal line are abnormal at the same time.
2. The display panel of claim 1, wherein the detection line is disposed in a same layer as the power signal line.
3. The display panel of claim 1, wherein the detection line comprises at least two metal traces, at least two of the metal traces are disposed in different layers, and at least two of the metal traces are disposed in parallel.
4. A display panel according to claim 3, wherein each of the metal traces is arranged in the same layer as a metal layer of the display panel.
5. The display panel of claim 1, wherein the display panel comprises a first bezel and a second bezel along the first direction; the distance from the hole area to the first frame is smaller than the distance from the hole area to the second frame; the second power signal line is arranged at one side of the hole area, which is far away from the second frame.
6. The display panel of claim 5, wherein a length of the second power signal line is less than a length of the first power signal line in the first direction.
7. The display panel of claim 1, wherein the crack detection circuit comprises at least two first transistors; the gate of the first transistor is used as a control end of the crack detection circuit, the first pole of the first transistor is used as an input end of the crack detection circuit, and the second pole of each first transistor is used as an output end of the crack detection circuit.
8. The display panel of claim 7, further comprising a second transistor, a third transistor, and a plurality of fourth transistors; the input end of the crack detection circuit is electrically connected with the second power signal line through the second transistor;
The grid electrode of the second transistor is electrically connected with the first detection control signal line of the display panel, the first electrode of the second transistor is electrically connected with the second power supply signal line, and the second electrode of the second transistor is electrically connected with the first electrode of the first transistor and the first electrode of the third transistor; a gate of the third transistor is electrically connected to a second detection control signal line of the display panel, and a second electrode of the third transistor is electrically connected to a detection signal line of the display panel and a first electrode of the fourth transistor; the grid electrode of the fourth transistor is electrically connected with the first control signal line, and the second pole of the fourth transistor is respectively and correspondingly electrically connected with the second data line of the display panel, wherein the second data line is a data line except the first data line.
9. The display panel of claim 1, wherein the aperture area comprises two; the detection line, the first power supply signal line and the second power supply signal line are two; the two first power supply signal lines are in contact.
10. A method of inspecting a display panel for inspecting the display panel of any one of claims 1 to 9; characterized by comprising the following steps:
Providing a power signal to a crack detection circuit of the display panel; and the crack detection circuit controls whether the pixel unit corresponding to the first data line of the display panel emits light or not according to the power signal.
11. A display device comprising the display panel of any one of claims 1-9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010238315.5A CN113466252B (en) | 2020-03-30 | 2020-03-30 | Display panel, detection method of display panel and display device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010238315.5A CN113466252B (en) | 2020-03-30 | 2020-03-30 | Display panel, detection method of display panel and display device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113466252A CN113466252A (en) | 2021-10-01 |
| CN113466252B true CN113466252B (en) | 2024-07-30 |
Family
ID=77864999
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010238315.5A Active CN113466252B (en) | 2020-03-30 | 2020-03-30 | Display panel, detection method of display panel and display device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113466252B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116648616A (en) | 2021-12-23 | 2023-08-25 | 京东方科技集团股份有限公司 | Display panel and display device |
| CN114241963B (en) * | 2021-12-27 | 2023-12-22 | 京东方科技集团股份有限公司 | Display panel, display device and crack detection method |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101546052A (en) * | 2008-03-27 | 2009-09-30 | 富士通株式会社 | Display apparatus and electronic apparatus having the display apparatus |
| CN106206654A (en) * | 2015-05-26 | 2016-12-07 | 三星显示有限公司 | Display device |
Family Cites Families (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009258548A (en) * | 2008-04-21 | 2009-11-05 | Canon Inc | Image display device and control method thereof |
| KR102716282B1 (en) * | 2016-09-12 | 2024-10-11 | 삼성디스플레이 주식회사 | Display device having test unit |
| KR102056678B1 (en) * | 2017-11-23 | 2019-12-17 | 엘지디스플레이 주식회사 | Organic light emitting display device |
| CN108492768B (en) * | 2018-03-23 | 2020-08-11 | 京东方科技集团股份有限公司 | Panel crack detection structure and detection method |
| CN109752421B (en) * | 2019-01-31 | 2021-08-24 | 厦门天马微电子有限公司 | Display panel and display device |
| CN209216456U (en) * | 2019-01-31 | 2019-08-06 | 昆山国显光电有限公司 | Display panel |
| CN109901747B (en) * | 2019-02-26 | 2022-03-11 | 上海天马微电子有限公司 | Display panel and display device |
| CN109979366B (en) * | 2019-04-10 | 2022-07-19 | 京东方科技集团股份有限公司 | An OLED display panel, detection method thereof, and display device |
| CN110299385B (en) * | 2019-06-17 | 2021-09-28 | 云谷（固安）科技有限公司 | Display device, display panel thereof and manufacturing method of display panel |
| CN110264891B (en) * | 2019-07-18 | 2022-02-01 | 京东方科技集团股份有限公司 | Array substrate, display panel and display device |
| CN110620103B (en) * | 2019-08-30 | 2021-12-07 | 合肥维信诺科技有限公司 | Display panel, electronic device and detection method |
| CN110648618B (en) * | 2019-10-08 | 2020-12-25 | 武汉华星光电半导体显示技术有限公司 | Crack detection circuit and display panel |
-
2020
- 2020-03-30 CN CN202010238315.5A patent/CN113466252B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101546052A (en) * | 2008-03-27 | 2009-09-30 | 富士通株式会社 | Display apparatus and electronic apparatus having the display apparatus |
| CN106206654A (en) * | 2015-05-26 | 2016-12-07 | 三星显示有限公司 | Display device |
Also Published As
| Publication number | Publication date |
|---|---|
| CN113466252A (en) | 2021-10-01 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US11238767B2 (en) | Array substrate, display device and method for detecting the same | |
| CN105096786B (en) | Array detection reliability determination methods, organic light emission backboard detection method and device | |
| US7265572B2 (en) | Image display device and method of testing the same | |
| JP5364209B2 (en) | Defective emitter detection for electroluminescent displays | |
| CN110211517B (en) | Display substrate, detection method thereof and display device | |
| KR20160060237A (en) | Display device | |
| US20210359071A1 (en) | Display panel, manufacturing method and detecting method thereof, and display device | |
| US9361820B2 (en) | Apparatus and method for inspecting short circuit defects | |
| US20090278835A1 (en) | Mother substrate of organic light emitting display devices and method of aging the same | |
| US11177336B2 (en) | Display substrate, repairing method thereof and display panel | |
| CN112086050B (en) | Display substrate, crack detection method thereof and display device | |
| CN113466252B (en) | Display panel, detection method of display panel and display device | |
| US20220246711A1 (en) | Display panel, method for repairing display panel, and display apparatus | |
| CN110827728B (en) | Display panel and display device | |
| CN113284443A (en) | Display panel, test method thereof and display device | |
| US10763391B2 (en) | Display panel, method for processing defective pixels thereof, display device | |
| US7053649B1 (en) | Image display device and method of testing the same | |
| CN109817135B (en) | Array substrate and testing, molding method, device, and display panel molding method | |
| JP5313590B2 (en) | Image display device | |
| CN112150920B (en) | Display panel and display device | |
| CN106909008B (en) | Array substrate, display panel and detection method of display panel | |
| KR101471391B1 (en) | Testing method for oled display device and tester for the same | |
| JP2010145712A (en) | Matrix type display device and method of inspecting matrix-type display device | |
| JP4499490B2 (en) | Organic EL display device substrate and organic EL display device | |
| CN107103866B (en) | AMOLED large panel detection device and detection method thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |