CN114488632A - Display panel, display device and detection method thereof - Google Patents
Display panel, display device and detection method thereof Download PDFInfo
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- CN114488632A CN114488632A CN202210101025.5A CN202210101025A CN114488632A CN 114488632 A CN114488632 A CN 114488632A CN 202210101025 A CN202210101025 A CN 202210101025A CN 114488632 A CN114488632 A CN 114488632A
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- 238000001514 detection method Methods 0.000 title claims abstract description 121
- 238000007689 inspection Methods 0.000 claims description 24
- 238000000034 method Methods 0.000 claims description 14
- 238000012360 testing method Methods 0.000 claims description 13
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- 238000010168 coupling process Methods 0.000 abstract description 3
- 238000005859 coupling reaction Methods 0.000 abstract description 3
- 238000010586 diagram Methods 0.000 description 20
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- 230000002950 deficient Effects 0.000 description 4
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- 230000008054 signal transmission Effects 0.000 description 4
- 230000002159 abnormal effect Effects 0.000 description 3
- 238000013461 design Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 239000004973 liquid crystal related substance Substances 0.000 description 3
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1345—Conductors connecting electrodes to cell terminals
- G02F1/13452—Conductors connecting driver circuitry and terminals of panels
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1345—Conductors connecting electrodes to cell terminals
- G02F1/13458—Terminal pads
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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
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K59/00—Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
- H10K59/10—OLED displays
- H10K59/12—Active-matrix OLED [AMOLED] displays
- H10K59/131—Interconnections, e.g. wiring lines or terminals
Abstract
The embodiment of the invention discloses a display panel, a display device and a detection method thereof. The display panel comprises a display area and a frame area; the frame area comprises a first binding area and a second binding area; the display area comprises a plurality of signal lines, and the first ends of the signal lines extend to the first binding area; the frame area comprises a plurality of first wires, the first binding area comprises a plurality of first binding pads, the second binding area comprises a plurality of second binding pads, the first ends of the first wires are electrically connected with the first binding pads, and the second ends of the first wires are electrically connected with the second binding pads; the frame area further comprises a plurality of second wires and a plurality of dummy bonding pads, the first ends of the second wires extend to the first binding area, the second ends of the second wires are electrically connected with the dummy bonding pads, the second wires are located between two adjacent first wires, and the dummy bonding pads are located between two adjacent second binding bonding pads. According to the technical scheme of the embodiment of the invention, the influence of short circuit of adjacent signal lines or coupling between the signal lines on the display panel can be avoided.
Description
Technical Field
The present invention relates to display technologies, and in particular, to a display panel, a display device, and a detection method thereof.
Background
Various display technologies are continuously developed along with the development of display technologies, and various flat panel display devices including, for example, a liquid crystal display panel (LCD), an organic light emitting display panel (OLED), a Plasma Display Panel (PDP), an electrophoretic display panel (EPD), and the like, have been developed.
The display panel comprises a display area and a frame area, wherein the display area is provided with pixel units for displaying pictures, and the frame area is provided with a related control circuit for controlling the display of the pixel units, such as a drive chip connected with the display area through a signal line. In the prior art, signals required by the operation of the driving chip are connected to a Flexible Printed Circuit (FPC) through leads on the display panel, and if two adjacent signals are critical signals inside the driving chip, short circuit is caused due to a process problem or the display or touch of the display panel is affected due to coupling or interference between signal lines, so that signal transmission is abnormal and the normal operation of the display panel is affected.
Disclosure of Invention
The embodiment of the invention provides a display panel, a display device and a detection method thereof, which are used for avoiding the influence of short circuit of adjacent signal lines or coupling between the signal lines on the display panel.
In a first aspect, an embodiment of the present invention provides a display panel, including:
a display area and a border area surrounding the display area;
the frame area comprises a first binding area and a second binding area, and the first binding area is positioned between the display area and the second binding area;
the display area comprises a plurality of signal lines, and first ends of the signal lines extend to the first binding area;
the frame area comprises a plurality of first wires, the first binding area comprises a plurality of first binding pads, the second binding area comprises a plurality of second binding pads, the first ends of the first wires are electrically connected with the first binding pads, and the second ends of the first wires are electrically connected with the second binding pads;
the frame area further comprises a plurality of second wires and a plurality of dummy bonding pads, a first end of each second wire extends to the corresponding first binding area, a second end of each second wire is electrically connected with the corresponding dummy bonding pad, the second wires are located between two adjacent first wires, the dummy bonding pads are located in the corresponding second binding areas, and the dummy bonding pads are located between two adjacent second binding pads.
In a second aspect, an embodiment of the present invention further provides a display device, including the display panel described above.
In a third aspect, an embodiment of the present invention further provides a detection method for a display device, which is applicable to the display device, where a frame region of a display panel includes a first detection pad, a second detection pad, and a detection trace, and the detection method includes:
and loading a test signal to a second bonding pad, and detecting whether the second bonding pad is short-circuited according to the output signal of the first detection pad.
The display panel provided by the embodiment of the invention comprises a display area and a frame area surrounding the display area; the frame area comprises a first binding area and a second binding area, and the first binding area is positioned between the display area and the second binding area; the display area comprises a plurality of signal lines, and the first ends of the signal lines extend to the first binding area; the frame area comprises a plurality of first wires, the first binding area comprises a plurality of first binding pads, the second binding area comprises a plurality of second binding pads, the first end of each first wire is electrically connected with the corresponding first binding pad, and the second end of each first wire is electrically connected with the corresponding second binding pad; the frame area further comprises a plurality of second wires and a plurality of dummy bonding pads, a first end of each second wire extends to the corresponding first binding area, a second end of each second wire is electrically connected with the corresponding dummy bonding pad, the second wires are located between two adjacent first wires, the dummy bonding pads are located in the corresponding second binding areas, and the dummy bonding pads are located between two adjacent second binding pads. The second routing is arranged between two adjacent first routing, and the dummy bonding pad is arranged between two adjacent second bonding pads, so that the situation that the adjacent first routing or the two adjacent second bonding pads are short-circuited due to the manufacturing process problem can be avoided; the second wires are electrically connected with the corresponding dummy bonding pads, so that the signals between the two adjacent first wires and the two adjacent second bonding pads can be shielded, the influence on the normal work of the display panel due to the abnormal signal transmission is avoided, and the performance of the display panel is favorably improved.
Drawings
FIG. 1 is a schematic diagram of a display panel according to the prior art;
fig. 2 is a schematic structural diagram of a display panel according to an embodiment of the present invention;
fig. 3 is a schematic partial structure diagram of a display panel according to an embodiment of the present invention;
fig. 4 is a schematic partial structure diagram of another display panel according to an embodiment of the present invention;
fig. 5 is a schematic partial structure diagram of another display panel according to an embodiment of the present invention;
fig. 6 is a schematic partial structure diagram of another display panel according to an embodiment of the present invention;
fig. 7 is a schematic structural diagram of another display panel according to an embodiment of the present invention;
fig. 8 is a schematic partial structure diagram of another display panel according to an embodiment of the present invention;
fig. 9 is a schematic partial structure diagram of another display panel according to an embodiment of the present invention;
fig. 10 is a schematic structural diagram of a display device according to an embodiment of the present invention;
fig. 11 is a schematic structural diagram of another display device according to an embodiment of the present invention.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be further noted that, for the convenience of description, only some of the structures related to the present invention are shown in the drawings, not all of the structures.
The terminology used in the embodiments of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. It should be noted that the terms "upper", "lower", "left", "right", and the like used in the description of the embodiments of the present invention are used in the angle shown in the drawings, and should not be construed as limiting the embodiments of the present invention. In addition, in this context, it will also be understood that when an element is referred to as being "on" or "under" another element, it can be directly formed on "or" under "the other element or be indirectly formed on" or "under" the other element through intervening elements. The terms "first," "second," and the like, are used for descriptive purposes only and not for purposes of limitation, and do not denote any order, quantity, or importance, but rather are used to distinguish one element from another. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
Fig. 1 is a schematic structural diagram of a display panel in the prior art. Referring to fig. 1, the display panel includes a display area 01 and a frame area 02, where the display area 01 is provided with a plurality of pixel units (not shown in fig. 1) arranged in an array, the pixel units may include sub-pixels with multiple light emitting colors, such as a red sub-pixel, a blue sub-pixel, and the three sub-pixels emit light with corresponding colors, so as to implement color display of the display panel. A certain frame (for example, a lower frame shown in fig. 1) of the frame region 02 is provided with a first binding region 03 and a second binding region 04, the first binding region 03 is used for binding a driver chip 05, the driver chip 04 is connected with a pixel unit in the display region 01, the second binding region 04 is used for binding a flexible circuit board FPC 06, and the other end of the FPC 06 can be bent to the back of the display panel to be connected with a main board of the display device.
The driver chip 05 is bound to the display panel through a first binding pad 031 disposed in the first binding region 03, the FPC 06 is bound to the display panel through a second binding pad 041 disposed in the second binding region 04, and the corresponding first binding pad 031 and the corresponding second binding pad 041 are connected through a trace 07 disposed on the display panel, where fig. 1 only schematically illustrates two first binding pads 031 and two second binding pads 041. Although two adjacent traces 07 or two adjacent second bonding pads 041 may have a certain distance in design, a short circuit may be caused during the manufacturing process due to a manufacturing process, for example, a short circuit between two adjacent traces 07 or a short circuit between two adjacent second bonding pads 041, especially as the resolution of the display panel is increased or the display panel has more functions (for example, touch), the number of signal lines of the display panel is large, and a short circuit phenomenon may occur due to an unreasonable layout of traces or pads. In addition, when two wires 07 with a short distance transmit different signals, the coupling effect of the two wires may affect the signals, which causes the signals transmitted to the display panel to be inconsistent with the preset signals, thereby affecting the performance of the display panel.
In order to solve the above problem, an embodiment of the present invention provides a display panel, including a display area and a frame area surrounding the display area; the frame area comprises a first binding area and a second binding area, and the first binding area is positioned between the display area and the second binding area; the display area comprises a plurality of signal lines, and the first ends of the signal lines extend to the first binding area; the frame area comprises a plurality of first wires, the first binding area comprises a plurality of first binding pads, the second binding area comprises a plurality of second binding pads, the first ends of the first wires are electrically connected with the first binding pads, and the second ends of the first wires are electrically connected with the second binding pads; the frame area further comprises a plurality of second wires and a plurality of dummy bonding pads, the first ends of the second wires extend to the first binding area, the second ends of the second wires are electrically connected with the dummy bonding pads, the second wires are located between two adjacent first wires, the dummy bonding pads are located in the second binding area, and the dummy bonding pads are located between two adjacent second binding bonding pads.
Fig. 2 is a schematic structural diagram of a display panel according to an embodiment of the present invention. Referring to fig. 2, the display panel includes a display area 10 and a frame area 20 surrounding the display area 10, where the display area includes a plurality of pixel units 11 and corresponding pixel circuits (not shown in fig. 2), and the embodiment of the present invention does not limit the types of the pixel units 11, and the pixel units may be non-active Light-Emitting pixel units, such as liquid crystal pixel units formed by liquid crystal and color filters, or active Light-Emitting pixel units, such as pixel units formed by Organic Light-Emitting diodes (OLEDs), and the pixel circuits may include a plurality of transistors and at least one capacitor, and may be selected according to actual situations when being implemented. The frame area 20 has no display function and is used for setting related circuits, such as shift register circuits arranged in the left and right frames, where the shift register circuits include a plurality of cascaded shift registers for providing scanning signals to corresponding pixel circuits. The border area 20 further includes a first binding area 30 and a second binding area 40, the first binding area 30 being located between the display area 10 and the second binding area 40. The first bonding region 30 includes a plurality of first bonding pads 31 (only 4 first bonding pads 31 are schematically illustrated in fig. 2), the first bonding pads 31 of the first bonding region 30 are used to be bonded together with the driver chip to realize electrical connection, and each interface of the driver chip is bonded with the corresponding first bonding pad 31. The second bonding region 40 includes a plurality of second bonding pads 41 (only 4 second bonding pads 41 are schematically illustrated in fig. 2), and the second bonding pads 41 of the second bonding region 40 are used to be bonded to the FPC for electrical connection. The display region 10 includes a plurality of signal lines 12, and illustratively, the signal lines 12 may be data signal lines connected to the pixel units 11, and first ends of the signal lines 12 extend to the first binding regions 30. In other embodiments, the signal line 12 may also be a touch signal line or a signal line for transmitting signals in other display panels. The border area 20 includes a plurality of first wires 50, a first end of each first wire 50 is electrically connected to the first bonding pad 31, a second end of each first wire 50 is electrically connected to the second bonding pad 41, and the first wires 50 implement signal transmission between the first bonding pads 31 and the second bonding pads 41. The frame area 20 further includes a plurality of second wires 60 and a plurality of dummy pads 70, a first end of the second wire 60 extends to the first binding area 30 but is not connected to the first binding pad 31 in the first binding area 30, a second end of the second wire 60 is electrically connected to the dummy pads 70, the second wire 60 is disposed between two adjacent first wires 50, so as to avoid a short circuit between two adjacent first wires 50, the dummy pads 70 are disposed in the second binding area 40, and the dummy pads 70 are disposed between two adjacent second binding pads 41, which is beneficial for avoiding a short circuit between two adjacent second binding pads 41. Moreover, when a display panel is tested in a display panel manufacturing process, if a short circuit fault occurs in the first wire 50 or the second binding pad 41 (at this time, the first wire 50 is short-circuited with the adjacent second wire 60 or the second binding pad 41 is short-circuited with the adjacent dummy pad 70), electrical signals on the second wire 60 and the dummy pad 70 may change, and the display panel with the fault may be screened out by detecting the signal. During the operation stage of the display panel, the second wire 60 may separate signals of two adjacent first wires 50, and the dummy pad 70 may separate signals of two adjacent second bonding pads 41, so as to reduce interference between the signals.
According to the technical scheme of the embodiment of the invention, the second routing is arranged between the two adjacent first routing, and the dummy bonding pad is arranged between the two adjacent second bonding pads, so that the short circuit of the adjacent first routing or the two adjacent second bonding pads caused by the process problem can be avoided; the second wires are electrically connected with the corresponding dummy bonding pads, so that the signals between the two adjacent first wires and the two adjacent second bonding pads can be shielded, the influence on the normal work of the display panel due to the abnormal signal transmission is avoided, and the performance of the display panel is favorably improved.
In the embodiment of the present invention, the number of the second trace and the dummy pad is not particularly limited, and various arrangement manners may be provided in the specific implementation. Fig. 3 is a schematic partial structure diagram of a display panel according to an embodiment of the present invention. Referring to fig. 3, optionally, one second trace 60 is disposed between any two adjacent first traces 50, and one dummy pad 70 is disposed between any two second bonding pads 41. By arranging the second wires 60 between all the first wires 50 and arranging the dummy pads 70 between all the second binding pads 41, the short circuit condition of all the first wires or the second dummy pads can be checked in the preparation process of the display panel, and the coupling effect between adjacent signals can be shielded to the greatest extent in the working process of the display panel.
In another embodiment, optionally, the distribution density of the dummy pads is gradually increased in a direction in which the center of the second bonding region points to both sides.
It can be understood that, in the process of manufacturing the display panel, the edge area of the bonding area is prone to short circuit failure, and by setting the distribution density of the dummy pads at the two sides of the second bonding area to be greater than that of the central area, the approach technical effect can be achieved on the basis of setting fewer dummy pads and second routing wires. For example, fig. 4 is a partial structural schematic view of another display panel provided in the embodiment of the present invention, and fig. 5 is a partial structural schematic view of another display panel provided in the embodiment of the present invention. Referring to fig. 4 and 5, the second binding region 40 includes a first region 401, a second region 402 and a third region 403 arranged from the center to two sides, the first region 401, the second region 402 and the third region 403 have the same number of second binding pads 41, one dummy pad 70 is disposed in the first region 401, three dummy pads 70 are disposed in the second region 402, and five dummy pads 70 are disposed in the third region 403, that is, the distribution density of the dummy pads 70 on two sides of the second binding region 40 is greater than that of the dummy pads 70 in the center region, so that the technical effect similar to the above embodiment can be achieved on the basis of fewer dummy pads and second traces.
It should be noted that the division of the second bonding area 40 into three areas from the center to one side in fig. 4 and 5 is only illustrative, in other embodiments, the division of the area of the second bonding area 40 is not limited, and the specific number and position of the dummy pads may be designed according to actual situations, which is not limited in the embodiment of the present invention.
Fig. 6 is a schematic partial structure diagram of another display panel according to an embodiment of the present invention. Referring to fig. 6, optionally, the frame region 20 further includes a first detection pad 32 and a detection trace 80, the first detection pad 32 is electrically connected to at least one dummy pad 70 through the detection trace 80, and the first detection pad 32 is used for outputting a signal on the corresponding dummy pad 70 when detecting the display panel.
By arranging the first detection pad 32, the first detection pad 32 can be used as an output end of a signal during display panel detection to detect an output signal on the dummy pad 70, for example, when the dummy pad 70 is short-circuited with the second bonding pad 41, the signal of the first detection pad 32 can be detected to be the same as or close to the signal on the second bonding pad 41, so that a defective display panel can be intercepted in a detection stage, and the preparation of the defective display panel can be avoided. When the dummy pad 70 does not send a short circuit with the second binding pad 41, it can be detected that the signal of the first detection pad 32 is independent of the second binding pad 41, for example, the ground signal GND on the dummy pad 70. In the embodiment of the present invention, the specific position of the first detection pad is not limited, and in specific implementation, referring to fig. 6, optionally, the first detection pad 32 is located in the first bonding region 30, and the first detection pad 32 may be connected to a detection port inside the driver chip to detect whether a short circuit abnormality occurs. In other embodiments, the first inspection pad 32 may also be an external test device inspection port, for example, fig. 7 is a schematic structural diagram of another display panel provided in an embodiment of the present invention, where the first inspection pad 32 is an external test circuit inspection port, and is disposed in an area outside the first bonding area 30 and the second bonding area 40, and a specific position of the first inspection pad 32 may be set according to actual requirements.
Fig. 8 is a schematic partial structure diagram of another display panel according to an embodiment of the present invention. Referring to fig. 8, optionally, the frame region 20 further includes a second inspection pad 42, and the second inspection pad 42 is located in the second bonding region 40; the detection trace 80 includes a first detection trace 81 and a second detection trace 82, the second detection pad 42 is electrically connected to the at least one dummy pad 70 through the first detection trace 81, and the first detection pad 32 and the second detection pad 42 are electrically connected through the second detection trace 82.
In this embodiment, the first detection pad 32 is located in the first bonding area 30, and the second detection pad 42 is located in the second bonding area 40, which can avoid the pad being disposed outside the bonding area, and simplify the design difficulty. Optionally, the dummy pad 70 and the second detection pad 42 are electrically connected through the first detection trace 81 disposed in the frame region 20. By directly disposing the first detection trace 81 on the frame region 20 of the display panel, the first detection trace can be designed simultaneously with other traces and formed by the same process.
In another embodiment, a plurality of second bonding pads with similar functions may be arranged in a group, and dummy pads in the group may be connected to the same inspection pad to reduce the number of inspection ports. Optionally, the second bonding area includes at least one bonding pad group, the bonding pad group includes at least three second bonding pads for transmitting signals of the same type and at least two dummy pads, and the dummy pads are electrically connected to the same first detection pad. For example, fig. 9 is a schematic partial structure diagram of another display panel according to an embodiment of the present invention. A set of binding pads 404 of the second binding area 40 is shown in fig. 9, the binding pad set 404 including three second binding pads 42 transmitting the same type of signal and two dummy pads 70, the two dummy pads 70 being electrically connected to the same first inspection pad 32. The two dummy pads 70 shown in fig. 9 are directly electrically connected to the first inspection pads 32 by connection lines for illustrative purposes, and in other embodiments, at least two dummy pads may be connected to a second inspection pad and then connected to the first inspection pad, which may be selected according to actual conditions.
Optionally, in this embodiment, the first trace 50, the second trace 60, and the detection trace 80 are formed by using the same material and the same process; the second sensing pads 42, the dummy pads 70 and the first sensing pads 32 are formed using the same process using the same material. Therefore, the first wire 50, the second wire 60 and the detection wire 80 can be designed and formed together, and the second detection pad 42, the dummy pad 70 and the first detection pad 32 can be designed and formed together, which is beneficial to simplifying the process difficulty.
The embodiment of the invention also provides a display device which comprises any one of the display panels provided by the embodiment. The display device can be a mobile phone, a computer, an intelligent wearable device and the like.
Since the display device provided by the embodiment of the present invention includes any one of the display panels provided by the above embodiments, the display device has the same or corresponding technical effects as the display panel, and details are not repeated herein.
Fig. 10 is a schematic structural diagram of a display device according to an embodiment of the present invention. Referring to fig. 10, optionally, the display device further includes a driving chip 90 and a flexible circuit board 100, the driving chip 90 is bound to the first binding region 30 of the display panel, one end of the flexible circuit board 100 is bound to the second binding region 40 of the display panel, and the other end of the flexible circuit board 100 may be bent toward a side away from the light emitting side of the display panel.
Optionally, the frame region of the display panel further includes a first detection pad and a detection trace, the first detection pad is electrically connected to at least one dummy pad through the detection trace, and the first detection pad is configured to output a signal on the corresponding dummy pad when detecting the display panel.
By arranging the first detection pad, the first detection pad can be used as an output end of a signal during detection of the display panel to detect an output signal on the dummy pad, for example, when the dummy pad is short-circuited with the second binding pad, the signal of the first detection pad can be detected to be the same as or close to the signal on the second binding pad, so that a defective display panel can be intercepted in a detection stage, and the defective display panel is prevented from being prepared. When the dummy pad does not send a short circuit with the second bond pad, it can be detected that the signal of the first detection pad is independent of the second bond pad, for example, the ground signal GND on the dummy pad.
Fig. 11 is a schematic structural diagram of another display device according to an embodiment of the present invention. Referring to fig. 11, optionally, the frame region 20 of the display panel further includes a second inspection pad 42; the detection trace 80 includes a first detection trace 81 and a second detection trace 82, the second detection pad 42 is electrically connected to the at least one dummy pad 70 through the first detection trace 81 disposed on the flexible circuit board 100, and the first detection pad 32 and the second detection pad 42 are electrically connected through the second detection trace 82 disposed on the bezel area 20. In this embodiment, the first detection trace 81 is disposed inside the flexible circuit board 100, so that the problem that the first detection trace 81 needs to be designed on the display panel to avoid crossing traces and the like can be avoided, and the design difficulty can be simplified.
The embodiment of the present invention further provides a detection method for a display device, which is applicable to the display device provided in the above embodiment, the frame region of the display panel includes a first detection pad, a second detection pad and a detection trace, and the detection method includes:
and loading a test signal to the second bonding pad, and detecting whether the second bonding pad is short-circuited according to an output signal of the first detection pad.
Optionally, the detecting whether the second bonding pad is short-circuited according to the output signal of the first detection pad includes:
if the output voltage of the first detection pad is the same as the voltage of the test signal, the bonding pad is short-circuited with the adjacent dummy pad.
And loading a test signal to the second binding pad at a test stage in the preparation process of the display panel, wherein if a short circuit occurs between the dummy pad and the second binding pad or between the first wire and the second wire, the potential of the dummy pad changes, and at the moment, the determination can be performed according to the output signal of the first detection pad. For example, the dummy pad is not connected to a signal, and should be initially at 0 potential or close to 0 potential, which is grounded, and when a short circuit occurs, the output signal of the first detection pad is the same as or slightly lower than the voltage of the test signal (there may be a certain voltage drop due to the resistance effect).
When the display panel passes through the test and does not have short circuit abnormality, the second wiring can be separated from the first wiring when the display panel normally works, and the dummy bonding pad separates the second binding bonding pad to play a role in signal shielding. Optionally, the first detection pad is located in the first bonding region, and the first detection pad is connected to the driver chip, and the detection method further includes:
and if the output voltage of the first detection bonding pad is different from the voltage of the test signal, the driving chip loads a reference voltage signal to the first detection bonding pad. Wherein the reference voltage signal may be a ground signal.
It is to be noted that the foregoing is only illustrative of the preferred embodiments of the present invention and the technical principles employed. 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 modifications, rearrangements, combinations and substitutions as will now become apparent to those skilled in the art without departing from the scope of the invention. Therefore, although the present invention has been described in greater detail by the above embodiments, the present invention is not limited to the above embodiments, and may include other equivalent embodiments without departing from the spirit of the present invention, and the scope of the present invention is determined by the scope of the appended claims.
Claims (17)
1. A display panel, comprising:
a display area and a border area surrounding the display area;
the frame area comprises a first binding area and a second binding area, and the first binding area is positioned between the display area and the second binding area;
the display area comprises a plurality of signal lines, and first ends of the signal lines extend to the first binding area;
the frame area comprises a plurality of first wires, the first binding area comprises a plurality of first binding pads, the second binding area comprises a plurality of second binding pads, the first ends of the first wires are electrically connected with the first binding pads, and the second ends of the first wires are electrically connected with the second binding pads;
the frame area further comprises a plurality of second wires and a plurality of dummy bonding pads, a first end of each second wire extends to the corresponding first binding area, a second end of each second wire is electrically connected with the corresponding dummy bonding pad, the second wires are located between two adjacent first wires, the dummy bonding pads are located in the corresponding second binding areas, and the dummy bonding pads are located between two adjacent second binding pads.
2. The display panel according to claim 1, wherein one of the second traces is disposed between any two adjacent first traces, and one of the dummy pads is disposed between any two of the second bonding pads.
3. The display panel according to claim 1, wherein the distribution density of the dummy pads is gradually increased in a direction in which a center of the second bonding region points to both sides.
4. The display panel according to claim 1, wherein the frame region further comprises a first detection pad and a detection trace, the first detection pad is electrically connected to at least one of the dummy pads through the detection trace, and the first detection pad is configured to output a signal on the corresponding dummy pad when detecting the display panel.
5. The display panel of claim 4, wherein the bezel region further comprises a second detection pad, the second detection pad being located at the second bonding region;
the detection wires comprise a first detection wire and a second detection wire, the second detection pad is electrically connected with at least one dummy pad through the first detection wire, and the first detection pad is electrically connected with the second detection pad through the second detection wire.
6. The display panel of claim 4, wherein the first detection pad is located at the first bonding area.
7. The display panel according to claim 4, wherein the second bonding area comprises at least one bonding pad group, the bonding pad group comprises at least three second bonding pads for transmitting signals of the same type and at least two dummy pads, and the dummy pads are electrically connected to the same first inspection pad.
8. The display panel according to claim 5, wherein the dummy pads and the second inspection pads are electrically connected by a first inspection trace disposed in the bezel area.
9. The display panel according to claim 5, wherein the first trace, the second trace and the detection trace are formed by using a same material and a same process;
the second inspection pad, the dummy pad and the first inspection pad are formed by using the same material and the same process.
10. A display device comprising the display panel according to any one of claims 1 to 9.
11. The display device according to claim 10, further comprising a driver chip and a flexible circuit board, wherein the driver chip is bound to the first binding region of the display panel, and one end of the flexible circuit board is bound to the second binding region of the display panel.
12. The display device according to claim 11, wherein the frame region of the display panel further comprises a first detection pad and a detection trace, the first detection pad is electrically connected to at least one of the dummy pads through the detection trace, and the first detection pad is configured to output a signal on the corresponding dummy pad when detecting the display panel.
13. The display device according to claim 12, wherein the bezel region of the display panel further comprises a second inspection pad;
the detection wires comprise a first detection wire and a second detection wire, the second detection pad is electrically connected with at least one dummy pad through the first detection wire arranged on the flexible circuit board, and the first detection pad and the second detection pad are electrically connected through the second detection wire arranged on the frame area.
14. A detection method of a display device is suitable for the display device according to any one of claims 11 to 13, wherein a frame region of a display panel includes a first detection pad, a second detection pad and a detection trace, and the detection method includes:
and loading a test signal to a second bonding pad, and detecting whether the second bonding pad is short-circuited according to the output signal of the first detection pad.
15. The method of claim 14, wherein detecting whether the second bond pad is shorted based on the output signal of the first detection pad comprises:
and if the output voltage of the first detection pad is the same as the voltage of the test signal, the binding pad is short-circuited with the adjacent dummy pad.
16. The inspection method of claim 14, wherein the first inspection pad is located at a first bonding area, and the first inspection pad is connected to the driver chip, the inspection method further comprising:
and if the output voltage of the first detection bonding pad is different from the voltage of the test signal, the driving chip loads a reference voltage signal to the first detection bonding pad.
17. The method of claim 16, wherein the reference voltage signal is a ground signal.
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