CN107464512B - Flexible display device - Google Patents

Flexible display device Download PDF

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Publication number
CN107464512B
CN107464512B CN201710835294.3A CN201710835294A CN107464512B CN 107464512 B CN107464512 B CN 107464512B CN 201710835294 A CN201710835294 A CN 201710835294A CN 107464512 B CN107464512 B CN 107464512B
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Prior art keywords
display area
grounding
display device
flexible
ground line
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CN107464512A (en
Inventor
柴慧平
杜凌霄
丁洪
杨康
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Shanghai Tianma Microelectronics Co Ltd
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Shanghai Tianma Microelectronics Co Ltd
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    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
    • G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
    • G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
    • G06F3/0416—Control or interface arrangements specially adapted for digitisers
    • G06F3/04164—Connections between sensors and controllers, e.g. routing lines between electrodes and connection pads
    • 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
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
    • G09F9/00—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements
    • G09F9/30—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements
    • G09F9/301—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements flexible foldable or roll-able electronic displays, e.g. thin LCD, OLED
    • 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
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
    • H10K77/00—Constructional details of devices covered by this subclass and not covered by groups H10K10/80, H10K30/80, H10K50/80 or H10K59/80
    • H10K77/10—Substrates, e.g. flexible substrates
    • H10K77/111—Flexible substrates

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  • Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • General Engineering & Computer Science (AREA)
  • Computer Hardware Design (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Human Computer Interaction (AREA)
  • Devices For Indicating Variable Information By Combining Individual Elements (AREA)
  • Investigating Or Analyzing Materials By The Use Of Electric Means (AREA)

Abstract

The invention discloses a flexible display device, comprising: a display area and a non-display area surrounding the display area, a first flexible substrate; an inorganic layer disposed on the first flexible substrate; the grounding wire is arranged on the inorganic layer and is arranged in the non-display area, and the grounding wire forms a detection loop; in the non-display area on at least the same side of the display area, the number of the grounding wires is at least two, and the at least two grounding wires comprise at least one first grounding wire and at least one second grounding wire; the inorganic layer is provided with a groove, the first grounding wire is arranged in the groove, and the second grounding wire is arranged on the surface of the inorganic layer. According to the invention, the position of the crack can be judged through the detection loop, and meanwhile, whether the inorganic layer and the first flexible substrate have the crack or not is judged, so that the detection rate of the risk product is improved; meanwhile, the first grounding wire is positioned in the groove, and the second grounding wire is positioned on the surface of the inorganic layer, so that the horizontal distance between the grounding wires can be reduced, and the narrow frame design of the flexible display device is facilitated.

Description

Flexible display device
Technical Field
The invention belongs to the technical field of display, and particularly relates to a flexible display device.
Background
With the continuous development of display technology, the flexible display panel will become the mainstream of the display field by virtue of its characteristics of lightness, thinness, flexibility and impact resistance.
A flexible display panel comprising: the substrate layer and the inorganic layer, wherein, the inorganic layer plays the role of buffering. In the manufacture of the flexible display panel, a flexible Polyimide (PI) solution is first coated on a rigid substrate (e.g., a glass substrate) to form a flexible base layer, and then an inorganic layer, a display device, various wirings, and the like are formed on the base layer. After the flexible display panel is manufactured, the flexible display panel needs to be separated from the rigid substrate, in the separation process, due to the fact that stress between all film layers of the flexible display panel is not matched, the situation of line breakage easily occurs, the more the line is close to the edge of the flexible display panel, the more the line is broken easily, and the line breakage easily causes failure of the flexible display panel.
Therefore, it is an urgent technical problem to be solved in the art to provide a flexible display panel and a flexible display device, which simplify the method for detecting whether the edge area of the flexible display panel is broken or not and improve the detection rate of the risk product.
Disclosure of Invention
In view of this, the present invention provides a flexible display device, which simplifies the method for detecting whether the edge area of the flexible display panel is broken, and improves the detection rate of the risk product.
In order to solve the above technical problem, a flexible display device includes: a display area and a non-display area surrounding the display area,
a first flexible substrate;
an inorganic layer disposed on the first flexible substrate;
the grounding wire is arranged on the inorganic layer and is arranged in the non-display area, and the grounding wire forms a detection loop;
in the non-display area on at least the same side of the display area, the number of the grounding wires is at least two, and the at least two grounding wires comprise at least one first grounding wire and at least one second grounding wire;
the inorganic layer is provided with a groove, the first grounding wire is arranged in the groove, and the second grounding wire is arranged on the surface of the inorganic layer.
Compared with the prior art, the flexible display device disclosed by the invention has the following beneficial effects that:
(1) according to the flexible display device provided by the invention, the non-display area is provided with the grounding wire, the grounding wire forms a detection loop, the position of the crack can be judged by judging whether the first grounding wire and the second grounding wire break or not in the non-display area on at least the same side of the display area of the flexible display device, so that whether the inorganic layer has the crack or not can be judged, and whether the first flexible substrate has the crack or not can also be judged, therefore, the detection rate of a risk product is improved, the detection result is a product with the crack on the first flexible substrate, the failure risk is higher, the subsequent processing is not needed, the production materials are saved, and the production cost is reduced;
(2) according to the flexible display device provided by the invention, because the first grounding wire is positioned in the groove and the second grounding wire is positioned on the surface of the inorganic layer, compared with the situation that the grounding wires are all arranged on the same plane (for example, all the grounding wires are arranged on the surface of the inorganic layer), the horizontal distance between the grounding wires can be reduced, and the narrow frame design of the flexible display device is facilitated; meanwhile, at least two grounding wires are arranged in the non-display area on the same side of the display area, after one grounding wire is broken, the rest grounding wires can still work normally, the yield of the flexible display device is improved, the grounding wires can play a certain electrostatic protection role and have a certain protection effect on other circuits on the inner side of the grounding wires, the more the number of the grounding wires arranged in the non-display area on the same side of the display area is, the stronger the corresponding protection effect on the circuits on the inner side of the grounding wires is, and the service life of the flexible display device is prolonged to a certain extent. Other features of the present invention and advantages thereof will become apparent from the following detailed description of exemplary embodiments thereof, which proceeds with reference to the accompanying drawings.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description, serve to explain the principles of the invention.
FIG. 1 is a schematic top view of a flexible display device according to the present invention;
FIG. 2 is a schematic cross-sectional view of a flexible display device according to the present invention;
FIG. 3 is a schematic diagram illustrating a connection between a ground line and a detection pin of the flexible display device according to the present invention;
FIG. 4 is a schematic diagram of another connection between a ground line and a detection pin of the flexible display device according to the present invention;
fig. 5 is a first ground line layout of the flexible display device according to the present invention;
fig. 6 is a second ground line layout of the flexible display device according to the present invention;
fig. 7 is a third ground line layout of the flexible display device according to the present invention;
fig. 8 is a fourth ground line arrangement of the flexible display device of the present invention;
fig. 9 is a fifth ground line layout of the flexible display device according to the present invention;
fig. 10 is a sixth ground line layout of the flexible display device according to the present invention;
FIG. 11 is a cross-sectional view of a ground line arrangement of the flexible display device according to the present invention;
FIG. 12 is a cross-sectional view of another ground line arrangement of the flexible display device according to the present invention;
fig. 13 is a top view of a flexible display device with touch function according to the present invention;
fig. 14 is a cross-sectional view of a flexible display device with touch function according to the present invention;
fig. 15 is a schematic diagram of a film structure of a flexible display device with a touch function according to the present invention;
fig. 16 is a top view of another flexible display device with touch control function according to the present invention.
Detailed Description
Various exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings. It should be noted that: the relative arrangement of the components and steps, the numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present invention unless specifically stated otherwise.
The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses.
Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail but are intended to be part of the specification where appropriate.
In all examples shown and discussed herein, any particular value should be construed as merely illustrative, and not limiting. Thus, other examples of the exemplary embodiments may have different values.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, further discussion thereof is not required in subsequent figures.
In the prior art, a method for detecting whether the wiring of the edge area of the flexible display panel is broken is complex, and the detection cost is high. To solve this problem, the present embodiment provides a flexible display device. The following describes the flexible display device provided in this embodiment with reference to the drawings.
Fig. 1 is a schematic top view of a flexible display device according to the present invention. Referring to fig. 1, the flexible display device includes: the flexible display device comprises a display area a and a non-display area b surrounding the display area a, wherein a grounding wire 3 is arranged in the non-display area b, the grounding wire 3 forms a detection loop, the detection loop is used for detecting whether cracks exist in the non-display area b, if the detection loop cannot be conducted or a detection signal is different from a detection value when the detection loop does not have cracks, the grounding wire 3 in the detection loop is considered to be broken, the cracks exist in the non-display area of the flexible display device, if the detection loop can be conducted and the detection signal is the same as the detection value when the detection loop does not have cracks, the grounding wire 3 in the detection loop is considered to be complete, and the cracks do not exist in the non-display area of the flexible display device. In a specific embodiment, during the detection, the resistance of the detection circuit is measured, and whether a crack exists in the non-display area of the flexible display device is judged according to the detection result. In the non-display area b on at least the same side of the display area a (e.g., the right side of the display area a shown in fig. 1), the number of the ground lines 3 is at least two, and the at least two ground lines 3 include at least one first ground line 301 and at least one second ground line 302.
Fig. 2 is a schematic cross-sectional view of a flexible display device according to the present invention. Referring to fig. 2, the flexible display device includes: a first flexible substrate 1 and an inorganic layer 2 disposed on the first flexible substrate 1. The inorganic layer 2 is provided with a grounding line 3, and the grounding line 3 is arranged in the non-display area b. The inorganic layer 2 has a groove 201, a first grounding line 301 is disposed in the groove 201, and a second grounding line 302 is disposed on the surface of the inorganic layer 2.
In the flexible display device provided by this embodiment, the non-display area is provided with the ground line, the ground line forms a detection loop, the first ground line located in the groove of the inorganic layer and the second ground line located on the surface of the inorganic layer are simultaneously arranged in the non-display area on at least the same side of the display area of the flexible display device, the detection loop is formed to detect whether the flexible display device has cracks, when the flexible display device has cracks, the ground line is broken due to the cracks, the broken ground line cannot transmit a detection signal, and the situation that the first flexible substrate and/or the inorganic layer has cracks to cause the ground line to break is different, so that the detection signals received by the detection loop are different, and therefore, the position where the cracks occur can be determined according to the difference of the detection signals, and simultaneously, whether the first flexible substrate and the inorganic layer have cracks can also be determined, compared with the situation that only one grounding wire is arranged in the prior art, the position where the crack is generated can be detected; the detection rate of the risk products is improved, the detection result is the product with cracks on the basal layer, the failure risk is high, subsequent processing is not needed, the production materials are saved, and the production cost is reduced; moreover, because the first grounding wire is positioned in the groove and the second grounding wire is positioned on the surface of the inorganic layer, compared with the situation that the grounding wires are all arranged on the same plane (for example, the grounding wires are all arranged on the surface of the inorganic layer), the horizontal distance between the grounding wires can be reduced, and the narrow frame design of the flexible display device is facilitated; meanwhile, at least two grounding wires are arranged in the non-display area on the same side of the display area, after one grounding wire is broken, the rest grounding wires can still work normally, the yield of the flexible display device is improved, the grounding wires can play a certain electrostatic protection role and have a certain protection effect on other circuits on the inner side of the grounding wires, the more the number of the grounding wires arranged in the non-display area on the same side of the display area is, the stronger the corresponding protection effect on the circuits on the inner side of the grounding wires is, and the service life of the flexible display device is prolonged to a certain extent.
With reference to fig. 2, optionally, the groove 201 penetrates through the inorganic layer 2 in the thickness direction of the inorganic layer 2, the first ground line 301 located in the groove 201 contacts with the surface of the first flexible substrate 1, and if the first flexible substrate 1 has a crack, the first ground line 301 may be broken due to the influence of the crack, so that the detection circuit cannot receive a signal or the received detection signal is different from the detection signal in the case of no crack, thereby determining that the first flexible substrate 1 has the crack and improving the crack detection sensitivity; further, the inorganic layer 2 is broken at the groove 201, and the crack generated in the inorganic layer 2 located at one side of the groove 201 cannot propagate further across the groove 201, and the effect of the groove 201 in preventing the crack from extending toward the display area a is strongest.
Fig. 3 is a schematic diagram illustrating a connection between a ground line and a detection pin of the flexible display device of the present invention, referring to fig. 3, optionally, the flexible display device provided in this embodiment further includes: a plurality of detection pins 4, at least one first grounding line 301 and at least one second grounding line 302 in the non-display area b on the same side of the display area a are electrically connected to the same detection pin 4; a plurality of grounding wires are connected to the same detection pin 4, the number of the detection pins 4 required is small, the space of a binding area is saved, and meanwhile, the crack condition of the area where the plurality of grounding wires are located can be detected quickly through detection for a small number of times. Fig. 4 is a schematic diagram illustrating a connection between a ground line and a detection pin of a flexible display device according to another embodiment of the present invention, referring to fig. 4, the flexible display device provided in this embodiment further includes: a plurality of detection pins 4, a first ground line 301 and a second ground line 302 are electrically connected with the detection pins 4 in a one-to-one correspondence manner; the ground wire is electrically connected with the detection pins 4 in a one-to-one correspondence manner, and whether a detection signal exists in a certain ground wire or not is judged more easily, so that whether the ground wire is broken or not is detected more conveniently, and the crack condition of the flexible display device is accurately judged.
The corresponding mode of the detection pins 4 and the ground lines 3 is that the first ground line 301 and the second ground line 302 which are positioned on the same side of the display area a are both connected to the same detection pin 4, or the first ground line 301 and the second ground line 302 which are positioned on the same side of the display area a are electrically connected with the detection pins 4 in a one-to-one correspondence manner, which is selected according to the specific arrangement mode of the ground lines 3. The following provides a specific exemplary embodiment of six ground line arrangements and a typical connection method of the ground lines and the detection pins.
Fig. 5 is a first ground line layout of the flexible display device according to the present invention. Referring to fig. 5, the display area a has a first side a1 and a second side a2 oppositely disposed along the first direction Y and a third side a3 and a fourth side a4 oppositely disposed along the second direction X, and the third side a3 and the fourth side a4 are adjacent to the first side a 1. Preferably, the first direction Y and the second direction X are perpendicular to each other, but the present invention is not limited thereto. The non-display area b further includes a bonding area b1, the bonding area b1 is located at the first side a1 of the display area a, and the sensing pin 4 is located at the bonding area b 1. It should be noted that the binding region b1 is located on the first side a1 of the display region a, which means that the non-display region portion where the binding region b1 is located is close to the first side a1 of the display region a, and the following similar expressions have the same explanation. In this embodiment, the grounding line 3 is located on the third side a3 and the fourth side a4 of the display area a, and can detect whether there is a crack in the non-display area b close to the third side a3 and the fourth side a4 of the display area a, of course, the grounding line 3 may be located only on the third side a3 or the fourth side a4 of the display area a, and the embodiment is not limited in this embodiment. In the ground wire arrangement manner of this embodiment, the ground wires 3 and the detection pins 4 are preferably electrically connected in a one-to-one correspondence manner, one of the detection pins 4 is used as an input terminal of a detection signal, and the other detection pin 4 is used as an output terminal of the detection signal, so that once the detection pin used as the output terminal has no output information, the ground wires 3 are broken, and the detection is simple and easy. In fig. 5, the ground lines 3 on the same side of the display area a include a first ground line 301 and a second ground line 302, one ends of the first ground line 301 and the second ground line 302 near the bonding area b1 are electrically connected to the detection pins 4 in a one-to-one correspondence, and one ends of the first ground line 301 and the second ground line 302 near the second side a2 of the display area a are electrically connected to the same node a. In the fourth side a4 of the display area a, the detection pin 4 electrically connected to the first ground line 301 is taken as a detection signal input end, and the detection pin 4 electrically connected to the second ground line 302 is taken as a detection signal output end, for example, if the output end receives a detection signal, neither the first ground line 301 nor the second ground line 302 of the fourth side a4 of the display area a of the flexible display device is broken, and it can be considered that the non-display area b close to the fourth side a4 of the display area a has no crack, and it can be confirmed that not only the inorganic layer has no crack, but also the first flexible substrate has no crack, thereby improving the detection rate of the risk product; and the detection result is that the first flexible substrate has a product with cracks, the failure risk is higher, subsequent processing is not needed, the production materials are saved, and the production cost is reduced. In the same manner, the ground line of the third side a3 of the display area a may be detected to determine whether the non-display area b near the third side a3 of the display area a has cracks. In the embodiment, the first grounding wire and the second grounding wire which are positioned on the same side of the display area form a detection loop, once the first flexible substrate or the inorganic layer cracks to break the first grounding wire or the second grounding wire, the detection loop cannot be conducted, and no detection signal is output at the output end, so that a product without cracks on the first flexible substrate and the inorganic layer can be detected simply and quickly, and accordingly, the detection rate of unqualified products is high.
Fig. 6 is a second ground line layout of the flexible display device according to the present invention. Referring to fig. 6, the display area a has a first side a1 and a second side a2 oppositely disposed along the first direction Y and a third side a3 and a fourth side a4 oppositely disposed along the second direction X, and the third side a3 and the fourth side a4 are adjacent to the first side a 1. Preferably, the first direction Y and the second direction X are perpendicular to each other, but the present invention is not limited thereto. The non-display area b further includes a bonding area b1, the bonding area b1 is located at the first side a1 of the display area a, and the sensing pin 4 is located at the bonding area b 1. In the present embodiment, the ground line 3 is located on the third side a3 and the fourth side a4 of the display area a. The ground lines 3 on the same side of the display area a (e.g., the third side a3 or the fourth side a4 shown in fig. 6) include a first ground line 301 and a second ground line 302, one end of the first ground line 301 and one end of the second ground line 302 near the bonding area b1 are electrically connected to the inspection pins 4 in a one-to-one correspondence, and one end of the first ground line 301 and one end of the second ground line 302 near the second side a2 of the display area a are electrically connected to the same node a. The ground line 3 further includes a third ground line 303, the third ground line 303 is located on the second side a2 of the display area a, and the third ground line 303 electrically connects the ground line 3 located on the third side a3 of the display area a and the ground line 3 located on the fourth side a4 of the display area a through a node a. In the present embodiment, the detection pin 4 electrically connected to the first ground line 301 of the fourth side a4 of the display area a is taken as an example of the detection signal input terminal, and for the sake of simplicity of explanation, the detection pin 4 electrically connected to the second ground line 302 of the fourth side a4 of the display area a is taken as a first output terminal, the detection pin 4 electrically connected to the first ground line 301 of the third side a3 of the display area a is taken as a second output terminal, and the detection pin 4 electrically connected to the second ground line 302 of the third side a3 of the display area a is taken as a third output terminal. Under the detection condition, after the input end inputs the detection signal, if the first output end, the second output end and the third output end can output the detection signal, all the grounding wires 3 are not broken, and the flexible display device is a qualified product; if the first output terminal does not output the detection signal, and the second output terminal and the third output terminal output the detection signal, the second ground line 302 of the fourth side a4 of the display area a is broken, but the first ground line 301 is still not broken at the fourth side a4 of the display area a, so the flexible display device can be considered to still have a complete ground line, and the flexible display device is a qualified product; if none of the three output terminals outputs the detection signal, the ground wire 3 connected to the input terminal may be broken, or the ground wires electrically connected to the three output terminals may be broken. By performing detection in the above-described manner, and performing determination based on different detection results, it is possible to determine whether any of the ground lines 3 (the first ground line 301, the second ground line 302, and the third ground line 303) is broken, and thereby determine whether the flexible display device is a non-defective product. The flexible display device is considered to be a qualified product as long as at least one of the grounding lines of the second side a2, the third side a3 and the fourth side a4 of the display area a is not broken. The flexible display device provided by the embodiment can judge whether the grounding wires are broken or not and detect whether any grounding wire is broken or not; the groove can slow down or prevent cracks from extending and propagating from the edge of the non-display area to the inner side of the groove, and influence on wiring on the inner side of the groove is reduced, so that the detection on the crack condition near the groove is particularly important, the second grounding wire on the inorganic layer can detect the existence condition of cracks on the peripheral part, the first grounding wire in the groove can detect the existence condition of cracks on the first flexible substrate, the first grounding wire and the second grounding wire can reflect the crack condition near the groove together, whether the crack crosses the groove to influence the wiring part on the inner side of the groove can be determined, and the detection result is more accurate.
Fig. 7 is a third ground line layout of the flexible display device according to the present invention. Referring to fig. 7, the display area a has a first side a1 and a second side a2 oppositely disposed along the first direction Y and a third side a3 and a fourth side a4 oppositely disposed along the second direction X, and the third side a3 and the fourth side a4 are adjacent to the first side a 1. Preferably, the first direction Y and the second direction X are perpendicular to each other, but the present invention is not limited thereto. The non-display area b further includes a bonding area b1, the bonding area b1 is located at the first side a1 of the display area a, and the sensing pin 4 is located at the bonding area b 1. In the present embodiment, the ground line 3 is located on the third side a3 and the fourth side a4 of the display area a. The ground lines 3 on the same side of the display area a include a first ground line 301 and a second ground line 302, one ends of the first ground line 301 and the second ground line 302 on the same side of the display area a near the bonding area b1 are electrically connected to the same detection pin 4, and one ends of the first ground line 301 and the second ground line 302 near the second side a2 of the display area a are electrically connected to the same node a. The ground line 3 further includes a third ground line 303, the third ground line 303 is located on the second side a2 of the display area a, and the third ground line 303 electrically connects the ground line 3 located on the third side a3 of the display area a and the ground line 3 located on the fourth side a4 of the display area a through a node a. In this embodiment, one of the detection pins 4 (for example, the detection pin near the third side a3 of the display area in fig. 7) is used as the detection signal input terminal, and the other detection pin 4 (for example, the detection pin near the fourth side a4 of the display area in fig. 7) is used as the detection signal output terminal, after the detection signal is input at the input terminal, if the detection signal is output by the output terminal, at least one of the ground lines of the second side a2, the third side a3 and the fourth side a4 of the display area a is not broken, and the flexible display device is a qualified product; if the output end does not output the detection signal, the flexible display device is an unqualified product. In the flexible display device provided by this embodiment, the ground lines 3 located on the same side of the display area a are connected to the same detection pin 4, so that the space of the bonding area can be saved. If the first grounding line 301 and the second grounding line 302 are made of the same material, it is determined which grounding line or grounding lines are broken with a high difficulty, and therefore, as an optimal scheme, the first grounding line 301 and the second grounding line 302 are made of materials with different resistances, and in the same detection loop, the resistances of the first grounding line 301 and the second grounding line 302 are different, so that whether one grounding line is broken or not can be detected quickly and accurately, and therefore whether cracks exist in the first flexible substrate and the inorganic layer or not can be determined quickly and accurately, whether the flexible display is a qualified product or not can be determined, and the detection mode is simple. In this embodiment, the first ground line and the second ground line located on the same side of the display area are connected to the same detection pin, so that whether cracks are generated in the first flexible substrate and the inorganic layer can be quickly judged according to the detection signal condition of the output end, the number of the detection pins is reduced, and the space of the binding area is saved.
Fig. 8 is a fourth ground line layout of the flexible display device according to the present invention. Referring to fig. 8, the display area a has a first side a1 and a second side a2 oppositely disposed along the first direction Y and a third side a3 and a fourth side a4 oppositely disposed along the second direction X, and the third side a3 and the fourth side a4 are adjacent to the first side a 1. Preferably, the first direction Y and the second direction X are perpendicular to each other, but the present invention is not limited thereto. The non-display area b further includes a bonding area b1, the bonding area b1 is located at the first side a1 of the display area a, and the sensing pin 4 is located at the bonding area b 1. In the present embodiment, the ground line 3 is located on the third side a3 and the fourth side a4 of the display area a. The ground lines 3 on the same side of the display area a include a first ground line 301 and a second ground line 302, and one ends of the first ground line 301 and the second ground line 302 on the same side of the display area a, which are close to the bonding area b1, are electrically connected to the detection pins 4 in a one-to-one correspondence. The ground lines 3 further include three ground lines 303, two third ground lines 303 are provided, the third ground lines 303 are located on the second side a2 of the display area a, and each third ground line 303 is electrically connected to one ground line 3 located on the third side a3 of the display area a and one ground line 3 located on the fourth side a4 of the display area a. In this embodiment, two detection loops are formed and detected respectively, and a detection loop close to the display area a is taken as an example for explanation, wherein one detection pin 4 is taken as a detection signal input end, and the other detection pin 4 is taken as a detection signal output end, after a detection signal is input at the input end, if the detection signal is output by the output end, one ground line is not broken on the second side a2, the third side a3 and the fourth side a4 of the display area a, and the flexible display device is a qualified product; if no output end outputs the detection signal, the flexible display device is an unqualified product. The flexible display device provided by the embodiment can judge whether a certain detection loop is broken or not, and judge whether the first flexible substrate and the inorganic layer are cracked or not according to the breaking condition of the detection loop; moreover, two grounding wires are arranged on the second side a2, the third side a3 and the fourth side a4 of the display area a, so that once one grounding wire is broken, the probability that the flexible display device still has a complete grounding circuit is improved, and the product yield of the flexible display device is improved.
Fig. 9 is a fifth ground line layout of the flexible display device according to the present invention. Referring to fig. 9, the display area a has a first side a1 and a second side a2 oppositely disposed along the first direction Y and a third side a3 and a fourth side a4 oppositely disposed along the second direction X, and the third side a3 and the fourth side a4 are adjacent to the first side a 1. Preferably, the first direction Y and the second direction X are perpendicular to each other, but the present invention is not limited thereto. The non-display area b further includes a bonding area b1, the bonding area b1 is located at the first side a1 of the display area a, and the sensing pin 4 is located at the bonding area b 1. In the present embodiment, the ground line 3 is located on the third side a3 and the fourth side a4 of the display area a. The ground lines 3 on the same side of the display area a include a first ground line 301 and a second ground line 302, and the ends of the first ground line 301 and the second ground line 302 on the same side of the display area a near the bonding area b1 are electrically connected to the same detection pin 4. The ground lines 3 further include three ground lines 303, two third ground lines 303 are provided, the third ground lines 303 are located on the second side a2 of the display area a, and each third ground line 303 is electrically connected to one ground line 3 located on the third side a3 of the display area a and one ground line 3 located on the fourth side a4 of the display area a. In this embodiment, one of the detection pins 4 is used as a detection signal input terminal, and the other detection pin 4 is used as a detection signal output terminal, after the detection signal is input at the input terminal, if the detection signal is output at the output terminal, at least one of the ground lines of the second side a2, the third side a3 and the fourth side a4 of the display area a is not broken, and the flexible display device is a qualified product; if no output end outputs the detection signal, the flexible display device is an unqualified product. The flexible display device provided by this embodiment can determine whether the flexible display device is a qualified product, but the first ground line 301 and the second ground line 302 are made of the same material, and then it is determined which one or more ground lines are broken with a high difficulty, so as to be an optimal scheme, the first ground line 301 and the second ground line 302 are made of materials with different resistances, and in the same detection loop, the resistances of the first ground line 301 and the second ground line 302 are different, so that whether one or more ground lines are broken can be quickly and accurately detected, and whether cracks exist in the first flexible substrate and the inorganic layer can be quickly and accurately determined. The flexible display device provided by the embodiment can judge whether the first flexible substrate and the inorganic layer generate cracks according to the condition of the detection signal of the output end, and moreover, two grounding wires are arranged on the second side a2, the third side a3 and the fourth side a4 of the display area a, so that once a certain grounding wire is broken, the probability that the flexible display device still has a complete grounding circuit is improved, and the product yield of the flexible display device is improved.
Fig. 10 illustrates a sixth ground line layout of the flexible display device according to the present invention. Referring to fig. 10, the display area a has a first side a1 and a second side a2 oppositely disposed along the first direction Y and a third side a3 and a fourth side a4 oppositely disposed along the second direction X, and the third side a3 and the fourth side a4 are adjacent to the first side a 1. Preferably, the first direction Y and the second direction X are perpendicular to each other, but the present invention is not limited thereto. The non-display area b further includes a bonding area b1, the bonding area b1 is located at the first side a1 of the display area a, and the sensing pin 4 is located at the bonding area b 1. In the present embodiment, the ground line 3 is located on the third side a3 and the fourth side a4 of the display area a. The ground lines 3 on the same side of the display area include two first ground lines 301 and two second ground lines 302, and one end of one first ground line 301 and one end of one second ground line 302 on the same side of the display area a near the bonding area b1 are electrically connected to the same detection pin 4, that is: the grounding wires 3 positioned at the third side a3 or the four sides a4 of the display area a are divided into two groups, each group consists of a first grounding wire 301 and a second grounding wire 302, and the grounding wires 3 of the same group are connected to the same detection pin 4; one ends of the first ground line 301 and the second ground line 302 near the second side a2 of the display area a are electrically connected to the same node a. The ground line 3 further includes a third ground line 303, the third ground line 303 is located on the second side a2 of the display area a, the third ground line 303 electrically connects the ground line 3 located on the third side a3 of the display area a and the ground line 3 located on the fourth side a4 of the display area a through a node a, it should be noted that the number of the third ground lines 303 is not limited to one, and when the number of the third ground lines 303 is increased, the function of the third ground line 303 for protecting the circuit inside the third ground line 303 can be enhanced, and the inside is the side close to the display area a. In this embodiment, one of the detection pins 4 is used as a detection signal input terminal, and the other detection pin 4 is used as a detection signal output terminal, as shown in fig. 10, a detection loop can be formed between any two detection pins 4 in the four detection pins 4, and can detect the ground lines 3 on the second side a2, the third side a3 and the fourth side a4 of the display area a, if at least one of the ground lines 3 on the second side a2, the third side a3 and the fourth side a4 of the display area a is not broken, the flexible display device is a qualified product; if the detection signal is not output by the output end after the detection signal is input by the input end, the flexible display device is an unqualified product. In the same detection loop, the first flexible substrate and the inorganic layer can be simultaneously detected, so that whether cracks exist in the first flexible substrate and the inorganic layer or not can be judged quickly and accurately, and the crack condition at a specific position can be known more comprehensively. If the first ground line 301 and the second ground line 302 are made of the same material, it is difficult to determine which ground line or ground lines are broken, and therefore, as an optimal scheme, the first ground line 301 and the second ground line 302 are made of materials with different resistances, and whether one ground line or ground lines are broken can be detected quickly and accurately. The flexible display device provided by the embodiment can judge that the grounding wire is broken according to different detection signals of the output end, so as to judge whether the first flexible substrate and the inorganic layer generate cracks; moreover, four grounding wires are arranged on the third side a3 and the fourth side a4 of the display area a, once one grounding wire is broken, the rest grounding wires can still enable the flexible display device to have a complete grounding circuit, and the product yield of the flexible display device is improved.
It should be noted that the arrangement of the ground lines and the connection manner of the ground lines to the detection pins are not limited to the above six specific embodiments, and the number of the first ground lines 301 and the second ground lines 302 located on the same side of the display area a in the above six specific embodiments is only an exemplary illustration and is not used to limit the number of the ground lines on the same side of the display area a.
Fig. 11 is a cross-sectional view of a ground line arrangement of the flexible display device according to the present invention. Referring to fig. 11, optionally, in the non-display area b on the same side of the display area a, the grounding line 3 farthest from the display area a is the second grounding line 302. Since the inorganic layer 2 is most likely to generate cracks, and the cracks generally extend from the edge of the non-display area b toward the display area a, the second ground line 302 is disposed at the outermost side, and the second ground line 302 can accurately detect the cracks generated in the inorganic layer 2, which can improve the sensitivity of detecting the cracks of the inorganic layer 2. In the non-display area b on the same side of the display area a, the first ground lines 301 and the second ground lines 302 are alternately arranged in a direction away from the display area a. Since the first ground line 301 and the second ground line 302 are not located in the same plane, the distance between the first ground line 301 and the second ground line 302 in the direction away from the display area a is smaller than the distance between the wirings disposed on the same plane, which can reduce the distance between the ground lines 3 in the direction away from the display area a, and facilitates the design of a narrow bezel.
Fig. 12 is a cross-sectional view of another arrangement of ground lines of the flexible display device according to the present invention. Referring to fig. 12, optionally, in the non-display area b on the same side of the display area a, the grounding line 3 farthest from the display area a is the second grounding line 302. In the non-display area b on the same side of the display area a, the distance between any first grounding line 301 and the display area a is smaller than the distance between the second grounding line 302 closest to the display area a and the display area a. The first grounding wire 301 and the second grounding wire 302 are arranged in such a way, so that the groove 201 is continuously arranged, and a better effect of preventing cracks from extending to the display area can be achieved; and this kind of arrangement of earth connection 3 for two second earth connections 302 that lie in the same side of display area are all closer to the edge of non-display area b, two first earth connections are closer to the display area, because the crackle produces from the edge of keeping away from the display area and being close to the non-display area more easily, and then extend to the display area, consequently adopt this arrangement, the second earth connection can detect the emergence condition of crackle more sensitively, when the crackle extends to the display area to a certain extent, can exert an influence to the line of drawing from the display area, the first earth connection can detect the crackle extension condition that probably influences the line of drawing, can be more accurate the extension range of the crackle of judgement first flexible substrate 1 and inorganic layer 2.
Fig. 13 is a top view of a flexible display device with a touch function provided in the present invention, please refer to fig. 13, optionally, the flexible display device further includes: the touch control device comprises a touch control electrode 5 and a touch control line 6, wherein the touch control electrode 5 is positioned in a display area a, and the touch control line 5 is positioned in a non-display area b; the touch line 6 is disposed between the ground line 3 and the display area a. Fig. 14 is a cross-sectional view of a flexible display device with touch function according to the present invention, please refer to fig. 14, in which a touch electrode 5 and a touch wire 6 are disposed on a surface of an inorganic layer 2. The flexible display device provided by the embodiment not only has the advantages of the flexible display device in the embodiment, but also has a touch function.
Fig. 15 is a schematic view of a film structure of a flexible display device with a touch function according to the present invention. Referring to fig. 15, the flexible display device further includes: the flexible display panel, flexible display panel and the laminating of first flexible substrate 1 mutually, in order to guarantee that flexible display device has good display effect, first flexible substrate 1 should be transparent substrate. As shown in fig. 15, the flexible display panel is located above the first flexible substrate 1, and it should be understood that what is referred to herein as above is above the first flexible substrate 1 in fig. 14, and if fig. 15 is rotated or turned over, the relative position of the flexible display panel and the first flexible substrate 1 is not changed. The flexible display panel includes: the display device comprises a second flexible substrate 10, a thin film transistor array, a display function layer and a thin film packaging layer 9, wherein the thin film transistor array, the display function layer and the thin film packaging layer are sequentially arranged on the second flexible substrate 10. Wherein, the thin film transistor array comprises a plurality of thin film transistors 7; a display function layer comprising a plurality of display devices 8, the display devices 8 comprising an anode 803, a display material 802 and a cathode 803; the thin film encapsulation layer 9 comprises a first inorganic layer 901, a second inorganic layer 903 and an organic layer 902 positioned between the first inorganic layer 901 and the second inorganic layer 903. The flexible display device shown in fig. 15 is a bottom emission structure, but of course, the flexible display device provided in this embodiment may also be a top emission structure, and in the flexible display device with the top emission structure, the first flexible substrate 1 is attached to the film encapsulation layer 9, or a polarizer is further disposed on the film encapsulation layer 9, and the first flexible substrate 1 is attached to the polarizer, which is not limited in this embodiment.
Fig. 16 is a top view of another flexible display device with touch control function according to the present invention. Referring to fig. 16, optionally, the flexible display device further includes: the electrostatic protection circuit 11, the electrostatic protection circuit 11 is located between the grounding line 3 and the touch line 6. It should be noted that the electrostatic protection circuit 11 includes an electrostatic protection device and a metal trace, and please refer to the prior art for a specific design scheme of the electrostatic protection circuit 11. In the flexible display device provided in this embodiment, the second ground line 302 located on the inorganic layer may detect the existence of a crack at the edge of the non-display area, and the first ground line located in the groove (not shown in fig. 16) may detect the existence of a crack on the first flexible substrate, so as to determine whether the crack crosses the groove to affect the trace portion; meanwhile, the grooves can prevent cracks from extending and propagating from the edges of the non-display area to the inner sides of the grooves, and influence on routing of the electrostatic protection circuit 11, touch lines and the like on the inner sides of the grooves is reduced; in addition, the electrostatic protection circuit 11 can effectively prevent other circuits in the flexible display device from being broken down by static electricity, and the service life of the flexible display device is prolonged.
Compared with the prior art, the flexible display device disclosed by the invention has the beneficial effects that:
(1) according to the flexible display device provided by the invention, the non-display area is provided with the grounding wire, the grounding wire forms a detection loop, the position of the crack can be judged by judging whether the first grounding wire and the second grounding wire break or not in the non-display area on at least the same side of the display area of the flexible display device, so that whether the inorganic layer has the crack or not can be judged, and whether the first flexible substrate has the crack or not can also be judged, therefore, the detection rate of a risk product is improved, the detection result is a product with the crack on the first flexible substrate, the failure risk is higher, the subsequent processing is not needed, the production materials are saved, and the production cost is reduced;
(2) according to the flexible display device provided by the invention, because the first grounding wire is positioned in the groove and the second grounding wire is positioned on the surface of the inorganic layer, compared with the situation that the grounding wires are all arranged on the same plane (for example, all the grounding wires are arranged on the surface of the inorganic layer), the horizontal distance between the grounding wires can be reduced, and the narrow frame design of the flexible display device is facilitated; meanwhile, at least two grounding wires are arranged in the non-display area on the same side of the display area, after one grounding wire is broken, the rest grounding wires can still work normally, the yield of the flexible display device is improved, a certain electrostatic protection effect can be achieved for the grounding wires, a certain protection effect is achieved for other circuits on the inner side of the grounding wires, the more the grounding wires are arranged in the non-display area on the same side of the display area, the stronger the corresponding protection effect on the circuits on the inner side of the grounding wires is, and the service life of the flexible display device is prolonged to a certain extent.
Although some specific embodiments of the present invention have been described in detail by way of examples, it should be understood by those skilled in the art that the above examples are for illustrative purposes only and are not intended to limit the scope of the present invention. It will be appreciated by those skilled in the art that modifications may be made to the above embodiments without departing from the scope and spirit of the invention. The scope of the invention is defined by the appended claims.

Claims (11)

1. A flexible display device, comprising: a display area and a non-display area surrounding the display area,
a first flexible substrate;
an inorganic layer disposed on the first flexible substrate;
a ground line disposed on the inorganic layer, the ground line being disposed in the non-display area, the ground line forming a detection loop;
the touch electrode and the touch line are arranged on the surface of the inorganic layer, the touch electrode is positioned in the display area, and the touch line is positioned in the non-display area; the touch control line is arranged between the grounding line and the display area;
the non-display area further comprises an electrostatic protection circuit, and the electrostatic protection circuit is positioned between the grounding wire and the touch wire;
the display area is provided with a first side and a second side which are oppositely arranged along a first direction, and a third side and a fourth side which are oppositely arranged along a second direction, and the third side and the fourth side are adjacent to the first side; the non-display area further includes: a binding region located on a first side of the display region along the first direction;
in the second direction, in the non-display area on at least the same side of the display area, the number of the grounding wires is at least two, and the at least two grounding wires comprise at least one first grounding wire and at least one second grounding wire;
the inorganic layer is provided with a groove, the first grounding wire is arranged in the groove, and the second grounding wire is arranged on the surface of the inorganic layer.
2. The flexible display device of claim 1, further comprising: the detection pins are electrically connected with at least one first grounding wire and at least one second grounding wire which are positioned on the same side of the display area.
3. The flexible display device of claim 1, further comprising: the first grounding wire, the second grounding wire and the detection pins are electrically connected in a one-to-one correspondence manner.
4. A flexible display device according to claim 2 or 3,
the detection pin is positioned in the binding region;
the grounding line is positioned on the third side of the display area, and/or the grounding line is positioned on the fourth side of the display area;
one end of the grounding wire close to the binding area is electrically connected with the detection pin, and one end of the grounding wire close to the second side of the display area is electrically connected with the same node.
5. A flexible display device according to claim 2 or 3,
the detection pin is positioned in the binding region;
the grounding lines are positioned on the third side and the fourth side of the display area;
the grounding line further comprises a third grounding line, and the third grounding line is positioned on the second side of the display area;
one end, close to the binding region, of the ground wire on the third side of the display region is electrically connected with the detection pin, and one end, close to the second side of the display region, of the ground wire is electrically connected with the third ground wire;
one end of the grounding wire positioned on the fourth side of the display area, which is close to the binding area, is electrically connected with the detection pin, and one end of the grounding wire, which is close to the second side of the display area, is electrically connected with the third grounding wire.
6. The flexible display device according to claim 1, wherein the ground line farthest from the display area in the non-display area on the same side of the display area is the second ground line.
7. The flexible display device according to claim 6, wherein the first ground line and the second ground line are alternately arranged in a non-display region on the same side of the display region in a direction away from the display region.
8. The flexible display device according to claim 6, wherein a distance between any of the first ground lines and the display area is smaller than a distance between the second ground line closest to the display area and the display area in a non-display area on the same side of the display area.
9. The flexible display device of claim 1, wherein the groove penetrates the inorganic layer in a thickness direction of the inorganic layer.
10. The flexible display device of claim 1, further comprising: a flexible display panel having a plurality of display elements,
the flexible display panel includes: a second flexible substrate having a first surface and a second surface,
the thin film transistor array, the display function layer and the thin film packaging layer are sequentially arranged on the second flexible substrate;
the first flexible substrate is attached to the flexible display panel.
11. The flexible display device of claim 10, wherein the first flexible substrate is a transparent substrate.
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