CN113641019A - Display panel, display device and display mother board - Google Patents
Display panel, display device and display mother board Download PDFInfo
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- CN113641019A CN113641019A CN202111194932.0A CN202111194932A CN113641019A CN 113641019 A CN113641019 A CN 113641019A CN 202111194932 A CN202111194932 A CN 202111194932A CN 113641019 A CN113641019 A CN 113641019A
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- test
- circuit board
- flexible circuit
- display panel
- binding
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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
- G02F1/1306—Details
- G02F1/1309—Repairing; Testing
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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
- G02F1/133351—Manufacturing of individual cells out of a plurality of cells, e.g. by dicing
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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
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K1/00—Printed circuits
- H05K1/02—Details
- H05K1/0277—Bendability or stretchability details
- H05K1/028—Bending or folding regions of flexible printed circuits
Abstract
The application discloses a display panel, a display device and a display mother board, wherein the display panel is divided into a display area and a non-display area, the non-display area is arranged around the display area, the display panel comprises a flexible circuit board covering area and a test wiring group, and the flexible circuit board covering area is arranged in the non-display area; the test wiring group comprises a plurality of exposed ends generated by cutting; wherein at least one of the exposed ends is located within the flexible circuit board footprint. The exposed end of the test wire group is arranged in the flexible circuit board covering area, and the exposed end can be covered by the flexible circuit board in later-stage display panel preparation, so that the problem that the exposed end of the test wire group is short-circuited with the conductive adhesive tape due to cutting is solved.
Description
Technical Field
The application relates to the technical field of display, in particular to a display panel, a display device and a display mother board.
Background
The lcd has been developed for many years, and the technology thereof is mature, and is the mainstream display at present, wherein the lcd has the advantages of being light and thin, and saving electricity, and is widely applied to electronic products such as computer screens, flat-panel televisions, mobile phones, and the like.
Generally, a liquid crystal display panel includes a display area and a non-display area around the display area, the non-display area is provided with a plurality of test wires, but after a large display mother board is cut, the test wires have ends exposed in the air from the side of the liquid crystal display panel, which causes short circuit due to contact with an attached conductive tape in subsequent processes, resulting in poor display.
Disclosure of Invention
The application aims to provide a display panel, a display device and a display mother board, and aims to solve the problem that a test wiring group of the display panel is short-circuited due to contact of a bare end generated after cutting and a conductive adhesive tape.
The application discloses a display panel, which is divided into a display area and a non-display area, wherein the non-display area is arranged around the display area, the display panel comprises a flexible circuit board covering area and a test wiring group, and the flexible circuit board covering area is arranged in the non-display area; the test wiring group comprises a plurality of exposed ends generated by cutting; wherein at least one of the exposed ends is located within the flexible circuit board footprint.
Optionally, the test routing group includes a plurality of test routing lines and a control signal line, and an active switch is disposed on each corresponding test routing line; the plurality of exposed ends are divided into a first exposed end and a plurality of second exposed ends; the first exposed end is generated by cutting the control signal wire; the second exposed end is cut by the test trace; the control signal line extends from the first exposed end to the inside of the display panel and is connected with the grid electrode of each active switch; the drain electrode of each active switch is connected with the test wiring in a one-to-one correspondence mode, and the source electrode of each active switch is connected with the second exposed end in a one-to-one correspondence mode; the first exposed end is located in the flexible circuit board covering area, and the second exposed end is located outside the flexible circuit board covering area.
Optionally, a plurality of first binding terminals and a plurality of second binding terminals are arranged in the coverage area of the flexible circuit board; the first binding terminals are respectively arranged on two sides of the coverage area of the flexible circuit board, and the second binding terminals are arranged between the first binding terminals on the two sides; each first binding terminal is electrically connected with the corresponding test wire; and each second binding terminal is bound with the corresponding signal wire in the display panel.
Optionally, a plurality of conductive line segments and a plurality of second binding terminals are arranged in the coverage area of the flexible circuit board; the plurality of conductive line segments are respectively arranged on two sides of a coverage area of the flexible circuit board, and the plurality of second binding terminals are arranged between the conductive line segments on the two sides; each conductive line segment is electrically connected with the corresponding test wire; and each second binding terminal is bound with the signal wiring in the display panel.
Optionally, the test wire group includes a plurality of test wires, and the exposed end is cut by the test wires; a plurality of test terminals and a plurality of second binding terminals are arranged in the coverage area of the flexible circuit board, the test terminals are arranged on two sides of the coverage area of the flexible circuit board, and the second binding terminals are arranged between the test terminals on the two sides; each test terminal is electrically connected with the corresponding test wire, and each second binding terminal is bound with the signal wire in the display panel.
Optionally, the test wire group includes a plurality of test wires, and the exposed end is cut by the test wires; a test terminal is arranged corresponding to each test wire; the test terminal is electrically connected with the test wire; the test terminal is arranged outside the coverage area of the flexible circuit board; the flexible circuit board coverage area is provided with a plurality of conductive line segments and a plurality of second binding terminals, the conductive line segments are respectively arranged on two sides of the flexible circuit board coverage area, and the second binding terminals are arranged between the conductive line segments on the two sides; each conductive line segment is electrically connected with the corresponding test wire, and each second binding terminal is bound with the signal wire in the display panel.
Optionally, the test wire group includes a plurality of test wires, and the exposed end is cut by the test wires; a test terminal is arranged corresponding to each test wire; the test terminal is electrically connected with the test wire; the test terminal is arranged outside the coverage area of the flexible circuit board; the flexible circuit board covering area is provided with a plurality of first binding terminals and a plurality of second binding terminals, the first binding terminals are respectively arranged on two sides of the flexible circuit board covering area, and the second binding terminals are arranged between the first binding terminals on the two sides; the test wiring corresponding to each first binding terminal is electrically connected, and each second binding terminal is bound with the signal wiring in the display panel.
The application also discloses a display device, display device includes as above arbitrary display panel and flexible circuit board, the flexible circuit board corresponds flexible circuit board coverage area sets up, the one end of flexible circuit board is fixed flexible circuit board coverage area, the other end is followed the display panel back of the body is buckled downwards and is exposed in order to cover the flexible circuit board coverage area expose the end.
Optionally, the flexible circuit board is a chip on film, and the control signal line of the display panel is bound and connected with the ground pin of the chip on film.
The application also discloses a show mother board, show the mother board and include a plurality of initial display panel that do not cut, every all be provided with the test in the initial display panel and walk the group, it is adjacent initial display panel passes through the test is walked the group and is connected, and is adjacent the line of cut has been preset between the initial display panel, the line of cut with the test is walked the line group juncture and is done the exposed end of line group is walked in the test, form as above arbitrary after the cutting of initial display panel through predetermined line of cut display panel.
For the scheme that the frame glue is arranged at the exposed end corresponding to the test wiring to isolate the conductive adhesive tape, the exposed end corresponding to the test wiring group is arranged to the coverage area of the flexible circuit board, the exposed end of the test wiring group is covered after the flexible circuit board is bent in the later-stage preparation of the display panel, so that the flexible circuit board exists between the exposed end of the test wiring group and the conductive adhesive tape when the conductive adhesive tape is pasted, the short circuit caused by the fact that the test wiring group is electrically connected with the conductive adhesive tape is avoided, the frame glue does not need to be arranged any more, the process is reduced, the preparation time of the display panel is saved, and the production efficiency is improved.
Drawings
The accompanying drawings, which are included to provide a further understanding of the embodiments of the application, are incorporated in and constitute a part of this specification, illustrate embodiments of the application and together with the description serve to explain the principles of the application. It is obvious that the drawings in the following description are only some embodiments of the application, and that for a person skilled in the art, other drawings can be derived from them without inventive effort. In the drawings:
fig. 1 is a schematic view of a display panel according to a first embodiment of the present application;
FIG. 2 is a schematic view of a display panel according to a second embodiment of the present application;
FIG. 3 is a schematic view of a display panel according to a third embodiment of the present application;
FIG. 4 is a schematic view of a display panel according to a fourth embodiment of the present application;
FIG. 5 is a schematic view of a display panel according to a fifth embodiment of the present application;
FIG. 6 is a schematic view of another display panel according to a fifth embodiment of the present application;
FIG. 7 is a schematic view of a display panel of a sixth embodiment of the present application;
fig. 8 is a schematic view of a display device of a seventh embodiment of the present application;
fig. 9 is a schematic view of a display motherboard according to an eighth embodiment of the present application.
100, a display panel; 110. a display area; 120. a non-display area; 130. a flexible circuit board footprint; 140. testing the wiring group; 141. testing the wiring; 142. a control signal line; 143. a first route segment; 144. a second route segment; 150. an exposed end; 151. a first exposed end; 152. a second exposed end; 160. an active switch; 180. a test terminal; 190. a first binding terminal; 200. a second binding terminal; 210. a conductive line segment; 300. a display device; 310. a flexible circuit board; 311. a driving chip; 400. a display mother board; 410. an initial display panel; 411. cutting a line; 412. the common line is tested.
Detailed Description
It is to be understood that the terminology, the specific structural and functional details disclosed herein are for the purpose of describing particular embodiments only, and are representative, but that the present application may be embodied in many alternate forms and should not be construed as limited to only the embodiments set forth herein.
In the description of the present application, the terms "first", "second" are used for descriptive purposes only and are not to be construed as indicating relative importance or as implicitly indicating the number of technical features indicated. Thus, unless otherwise specified, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature; "plurality" means two or more. The terms "comprises" and "comprising," and any variations thereof, are intended to cover a non-exclusive inclusion, such that one or more other features, integers, steps, operations, elements, components, and/or combinations thereof may be present or added.
Further, terms of orientation or positional relationship indicated by "center", "lateral", "upper", "lower", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, are described based on the orientation or relative positional relationship shown in the drawings, are simply for convenience of description of the present application, and do not indicate that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present application.
Furthermore, unless expressly stated or limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly and may include, for example, fixed connections, removable connections, and integral connections; can be mechanically or electrically connected; either directly or indirectly through intervening media, or through both elements. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.
The present application will now be described in detail with reference to the drawings and alternative embodiments, it being understood that any combination of the various embodiments or technical features described below may form new embodiments without conflict.
Fig. 1 is a schematic diagram of a display panel according to a first embodiment of the present application, and as shown in fig. 1, as the first embodiment of the present application, the display panel 100 is divided into a display area 110 and a non-display area 120, the non-display area 120 is disposed around the display area 110, the display panel 100 includes a flexible circuit board coverage area 130 and a plurality of test routing groups 140, the flexible circuit board coverage area 130 is disposed in the non-display area 120, and a side of the flexible circuit board coverage area 130 away from the display area 110 is flush with a side of the non-display area 120 away from the display area 110; the test routing group 140 includes a plurality of exposed ends 150 resulting from dicing; at least one of the exposed ends 150 is located in the flexible circuit board covered area 130, and is exposed on a side of the flexible circuit board covered area 130 far away from the display area 110.
The path of the test wiring group 140 is changed, so that the exposed end of the test wiring group 140 generated by cutting is located in the flexible circuit board covering area 130, therefore, in the preparation of the later-stage display panel 100, the flexible circuit board 310 can well cover the exposed end 150 of the test wiring group 140 generated by cutting after being bent, the exposed end 150 is prevented from contacting with a conductive adhesive tape, and a short circuit is caused.
Fig. 2 is a schematic view of a display panel according to a second embodiment of the present application, which is a further limitation and refinement of the first embodiment, specifically, as shown in fig. 2, the test wire group 140 includes a plurality of test wires 141 and a control signal line 142, an active switch 160 is disposed on each test wire 141, and the exposed ends 150 are divided into a first exposed end 151 and a plurality of second exposed ends 152; the first exposed end 151 is cut by the control signal line 142; the second exposed end 152 is cut by the test traces 141, the first exposed end 151 is located in the flexible circuit board coverage area 130, the second exposed end 152 is located outside the flexible circuit board coverage area 130, it should be noted that one control signal line 142 corresponds to all the test traces on one side, both sides of the display panel have test trace groups, one control signal line corresponds to all the active switches 160 on all the test traces 141 on the same side, and multiple control signal lines can be provided, which can be selected according to the number of the corresponding test trace groups.
Generally, the active switches 160 are thin film transistors turned on at a high level, and the control signal lines extend inward from the first exposed ends 151 and are connected to the gates of the active switches 160; the drain of each active switch 160 is electrically connected to the test trace 141 in a one-to-one correspondence, and the source of each active switch is connected to the second exposed end 152 of the test trace in a one-to-one correspondence;
generally, the test trace 141 includes a first trace segment 143 and a second trace segment 144; the active switch 160 is disposed between the first line segment 143 and the second line segment 144; specifically, the drain of the active switch 160 is connected to the first wire segment 143, the second wire segment 144 is connected to the source of the active switch 160 and the second exposed end 152, and the control signal line 142 is connected to the gate of the active switch 160.
The original test wiring 141 still keeps the walking path unchanged, and the active switch 160 is added, so that even if the source terminal of the active switch 160 is exposed after cutting, if the active switch 160 keeps the off state, a short circuit cannot be caused when the conductive adhesive tape is attached at the later stage; in order to keep the active switches 160 turned off, the gates of all the corresponding active switches 160 are connected together by a control signal line 142, the control signal line 142 is introduced into the flexible circuit board cover region 130, and the exposed end of the control signal line 142 formed after cutting is still covered by the flexible circuit board 310, because there is no charge to open the gate of the active switch 160 so as to turn on the active switch 160.
Further, for convenience of testing, a test terminal 180 is further arranged when the active switch 160 is arranged, and the cut test terminal can be used for testing after being combined with the display panel into a box; specifically, the test trace 141 is communicated with the control signal line 142 sequentially through the test terminal 180 and the active switch 160; a plurality of first binding terminals 190 and a plurality of second binding terminals 200 are arranged in the flexible circuit board covering region 130, the plurality of first binding terminals 190 are respectively arranged at two sides of the flexible circuit board covering region 130, and the plurality of second binding terminals 200 are arranged between the first binding terminals 190 at two sides; each first binding terminal 190 is electrically connected to a corresponding test trace 141; each of the second binding terminals 200 is bound to a corresponding signal trace in the display panel 100.
Generally, if the area of the flexible circuit board footprint 130 is large, the first binding terminal 190 for connecting the control signal line 142 and the first exposed end 151 can be continuously disposed, and by disposing the first binding terminal 190, even if the charges accumulated at the first exposed end 151 need to pass through the first binding terminal 190 and reach the gate of the active switch 160, in this process, the first binding terminal 190 can disperse the accumulated charges, so as to prevent the charges from being excessively accumulated and turning on the active switch 160.
Fig. 3 is a schematic diagram of a display panel according to a third embodiment of the present application, and as a third embodiment of the present application, unlike the second embodiment, as shown in fig. 3, the flexible circuit board coverage area 130 is provided with a plurality of conductive line segments 210 and a plurality of second binding terminals 200, the plurality of conductive line segments 210 are respectively disposed on two sides of the flexible circuit board coverage area 130, generally, only one conductive line segment 210 may be disposed on two sides, and the plurality of second binding terminals 200 are disposed between the conductive line segments 210 on two sides; each conductive line segment 210 is electrically connected to the corresponding test trace 141; each of the second binding terminals 200 is bound to a signal trace in the display panel 100, and the control signal line 142 connects the gates of all the active switches 160 and the conductive line segments together.
Considering that the area of the flexible circuit board cover region 130 reserved by many display panels 100 is limited, we can only set a corresponding conductive line segment in the flexible circuit board cover region 130, and connect the first exposed end 151 with the control signal line 142 through the conductive line segment, so as to save the space covered by the flexible circuit board 310, and save the space for placing other structures, where the conductive line segment 210 may also be a part of the test trace, that is, the test trace 141 extends to the binding region, and the first exposed end 151 is formed in the flexible circuit board cover region by cutting.
Fig. 4 is a schematic view of a display panel according to a fourth embodiment of the present application, as shown in fig. 4, as a fourth embodiment of the present application, as shown in fig. 4, the test wire group 140 includes a plurality of test wires 141, and the exposed end 150 is cut by the test wires 141; the flexible circuit board covering area 130 is provided with a plurality of test terminals 180 and a plurality of second binding terminals 200, the occupied space of the test terminals 180 is larger than that of the second binding terminals 200, the test terminals 180 are arranged on two sides of the flexible circuit board covering area 130, the peripheral space can be reasonably utilized, and the second binding terminals 200 are arranged between the test terminals 180 on the two sides; each of the test terminals 180 is electrically connected to the corresponding test trace 141, and each of the second binding terminals 200 is bound to a signal trace in the display panel 100.
More specifically, the test trace 141 includes a first trace segment 143, the exposed end 150 is cut from the first trace segment 143, the test terminal 180 connects the first trace segment 143 and the exposed end 150, and the second binding terminal 200 is bound to a signal trace in the display panel 100.
Each corresponding test wire 141 is correspondingly connected with a test terminal 180 arranged in the flexible circuit board coverage area 130, so that the test accuracy of each test wire 141 is ensured, and the influence between different test wires 141 is avoided; and the test terminals 180 are disposed at the flexible circuit board footprint 130 and tested before bonding, i.e., as the test terminals 180, and bonded after bonding as the bonding terminals.
Fig. 5 is a schematic view of a display panel according to a fifth embodiment of the present application, and as shown in fig. 5, as the fifth embodiment of the present application, the test trace group 140 includes a plurality of test traces 141, and the exposed end 150 is cut by the test traces 141; a test terminal 180 is disposed on each test trace 141; the test terminal 180 is electrically connected with the test trace 141; the test terminals 180 are disposed outside the flexible circuit board footprint 130; the flexible circuit board covering region 130 is provided with a plurality of conductive line segments 210 and a plurality of second binding terminals 200, the plurality of conductive line segments 210 are respectively arranged on two sides of the flexible circuit board covering region 130, and the plurality of second binding terminals 200 are arranged between the conductive line segments 210 on the two sides; each of the conductive line segments 210 is electrically connected to the corresponding test trace 141, and each of the second bonding terminals 200 is bonded to a signal trace in the display panel 100.
More specifically, the test trace 141 includes a first trace segment 143 and a second trace segment 144, and a test terminal 180 is disposed between the first trace segment 143 and the second trace segment 144; the exposed end 150 is cut from the second wire segment 144; the conductive line segment connects the second routing segment 144 and the exposed end 150, and the second binding terminal 200 is bound with a signal routing in the display panel 100.
When the area of the flexible circuit board coverage area 130 is small, the test terminals 180 may also be disposed outside the flexible circuit board coverage area 130, for example, at positions such as the side of the non-display area 120, and the test terminals 180 generally close to the flexible circuit board coverage area 130 may be routed from the side, so as to avoid occupying more space and avoiding contact between the test traces 141.
Of course, as shown in fig. 6, the second wire segment 144 may be connected to the first wire segment 143 by bypassing the test terminal 180, the first wire segment 143 may be directly connected to the second wire segment 144 at the test terminal 180 near the outermost side of the non-display area 120, the first wire segment 143 and the second wire segment 144 corresponding to the inner test terminal 180 are connected through the test terminal 180, and the position of the test terminal 180 may be freely set.
Fig. 7 is a schematic view of a display panel according to a sixth embodiment of the present application, and as shown in fig. 7, as the sixth embodiment of the present application, the test trace group 140 includes a plurality of test traces 141, and the exposed end 150 is cut by the test traces 141; a test terminal 180 is disposed on each test trace 141; the test terminal 180 is electrically connected with the test trace 141; the test terminals 180 are disposed outside the flexible circuit board footprint 130.
More specifically, the test trace 141 includes a first trace segment 143 and a second trace segment 144, and a test terminal 180 is disposed between the first trace segment 143 and the second trace segment 144; the exposed end 150 is cut from the second wire segment 144; the flexible circuit board covering region 130 is provided with a plurality of first binding terminals 190 and a plurality of second binding terminals 200, the plurality of first binding terminals 190 are respectively arranged at two sides of the flexible circuit board covering region 130, and the plurality of second binding terminals 200 are arranged between the first binding terminals 190 at two sides; the test trace 141 corresponding to each first binding terminal 190 is electrically connected, each second binding terminal 200 is bound to a signal trace in the display panel 100, the first binding terminal 190 connects the second trace segment 144 and the exposed end 150, the second binding terminal 200 is bound to a signal trace in the display panel 100, and the first binding terminal 190 and the second binding terminal 200 are formed at the same time.
In order to better protect the exposed end 150, a first binding terminal 190 is further added between the second wire segment 144 of the test wire 141 and the exposed end, so that even if the exposed end 150 accumulates charges, voltage can be divided through the first binding terminal 190, and damage to the flexible circuit board 310 due to an excessive voltage is avoided.
Fig. 8 is a schematic diagram of a display device according to a seventh embodiment of the present application, and as shown in fig. 8, the present application further discloses a display device 300, where the display device 300 includes the display panel 100 and a flexible circuit board 310 according to any of the above embodiments, the flexible circuit board 310 is disposed corresponding to the flexible circuit board coverage area 130, one end of the flexible circuit board 310 is fixed to the flexible circuit board coverage area 130, and the other end of the flexible circuit board 310 is bent downward along the back surface of the display panel 100 to cover the exposed end 150 exposed at the side of the flexible circuit board coverage area 130.
Generally, the flexible circuit board 310 is a chip on film, and based on the display panel in the second embodiment, the control signal lines are bound and connected to the ground pins of the chip on film; more specifically, the chip on film comprises a flexible substrate and a driving chip, wherein the driving chip is arranged on the flexible substrate, and the control signal line is connected to the flexible substrate; and the grounding pin of the driving chip provides a low-level signal or a grounding signal for the control signal.
Referring to fig. 2 and 8, it is essential that the first binding terminal 190 connected to the gate of the active switch 160 is connected to the ground pin (GND) of the driving chip 311, and the driving chip 311 provides a continuous ground signal, that is, the active switch 160 is kept continuously off, so as to avoid short circuit in the display panel 100 caused by the active switch 160 being inadvertently turned on due to static electricity accumulation at the exposed end.
It should be further noted that the flexible circuit board may also be a flexible film, the display panel in any of the above embodiments is a COG panel, and a driving chip is packaged on the display panel, based on the second embodiment and the third embodiment, the control signal line is connected to the ground pin or the low level pin of the driving chip 311, and the driving chip 311 provides a continuous ground signal or a continuous low level signal, so that the active switch 160 is kept continuously turned off, thereby preventing electrostatic accumulation at the exposed end of the test trace from falsely triggering the conduction of the active switch, which causes a short circuit in the display panel.
Fig. 9 is a schematic view of a display mother board according to an eighth embodiment of the present disclosure, and as shown in fig. 9, the present disclosure further discloses a display mother board 400, where the display mother board 400 includes a plurality of uncut initial display panels 410, each of the initial display panels 410 is provided with a test routing group 140, the adjacent initial display panels 410 are connected by the test routing group 140, a cutting line 411 is preset between the adjacent initial display panels 410, a junction between the cutting line and the test routing group 140 is an exposed end 150 of the test routing group 140, and the initial display panels 410 are cut by the preset cutting line 411 to form the display panel according to any one of the above embodiments.
The large display mother board 400 further includes a plurality of test common lines 412, the test wiring group 140 includes a plurality of test wirings 141, and the plurality of test wirings 141 are respectively connected to the plurality of test common lines 412 in a one-to-one correspondence manner; a plurality of cutting lines 411 are preset according to the distribution of the initial display panel 410, the display panel can be cut from a large motherboard by cutting along the plurality of cutting lines 411, and the test trace 141 is exposed on the side edge of the display panel at the position of the corresponding cutting line; of course, only one cutting line 411 is disposed between two adjacent display panels, and the display panels are correspondingly disposed with more test transition lines (not shown in the figure), so as to transmit the test signal to the next display panel through the test transition lines, and the test transition lines may not be connected to the circuit inside the current display panel, but only connected to the test traces 141.
It should be noted that, the limitations of each step in the present disclosure are not considered to limit the order of the steps without affecting the implementation of the specific embodiments, and the steps written in the foregoing may be executed first, or executed later, or even executed simultaneously, and as long as the present disclosure can be implemented, all the steps should be considered as belonging to the protection scope of the present application.
It should be noted that the inventive concept of the present application can form many embodiments, but the present application has a limited space and cannot be listed one by one, so that, on the premise of no conflict, any combination between the above-described embodiments or technical features can form a new embodiment, and after the embodiments or technical features are combined, the original technical effect will be enhanced.
The foregoing is a more detailed description of the present application in connection with specific alternative embodiments, and the specific implementations of the present application are not to be considered limited to these descriptions. For those skilled in the art to which the present application pertains, several simple deductions or substitutions may be made without departing from the concept of the present application, and all should be considered as belonging to the protection scope of the present application.
Claims (10)
1. A display panel divided into a display area and a non-display area, the non-display area being disposed around the display area, the display panel comprising:
the flexible circuit board coverage area is arranged in the non-display area; and
the test wiring group comprises a plurality of exposed ends generated by cutting;
wherein at least one of the exposed ends is located within the flexible circuit board footprint.
2. The display panel of claim 1, wherein the test routing group comprises a plurality of test routing lines and a control signal line, and an active switch is disposed on each corresponding test routing line;
the plurality of exposed ends are divided into a first exposed end and a plurality of second exposed ends; the first exposed end is generated by cutting the control signal wire; the second exposed end is cut by the test trace;
the control signal line extends from the first exposed end to the inside of the display panel and is connected with the grid electrode of each active switch; the drain electrode of each active switch is connected with the test wiring in a one-to-one correspondence mode, and the source electrode of each active switch is connected with the second exposed end in a one-to-one correspondence mode;
the first exposed end is located in the flexible circuit board covering area, and the second exposed end is located outside the flexible circuit board covering area.
3. The display panel of claim 2, wherein a plurality of first binding terminals and a plurality of second binding terminals are disposed within the flexible circuit board footprint;
the first binding terminals are respectively arranged on two sides of the coverage area of the flexible circuit board, and the second binding terminals are arranged between the first binding terminals on the two sides; each first binding terminal is electrically connected with the corresponding test wire; and each second binding terminal is bound with the corresponding signal wire in the display panel.
4. The display panel of claim 2, wherein a plurality of conductive line segments and a plurality of second binding terminals are disposed within the flexible circuit board footprint;
the plurality of conductive line segments are respectively arranged on two sides of a coverage area of the flexible circuit board, and the plurality of second binding terminals are arranged between the conductive line segments on the two sides; each conductive line segment is electrically connected with the corresponding test wire; and each second binding terminal is bound with the signal wiring in the display panel.
5. The display panel of claim 1, wherein the set of test traces includes a plurality of test traces, the exposed ends resulting from dicing the test traces;
a plurality of test terminals and a plurality of second binding terminals are arranged in the coverage area of the flexible circuit board, the test terminals are arranged on two sides of the coverage area of the flexible circuit board, and the second binding terminals are arranged between the test terminals on the two sides;
each test terminal is electrically connected with the corresponding test wire, and each second binding terminal is bound with the signal wire in the display panel.
6. The display panel of claim 1, wherein the set of test traces includes a plurality of test traces, the exposed ends resulting from dicing the test traces;
A test terminal is arranged corresponding to each test wire; the test terminal is electrically connected with the test wire; the test terminal is arranged outside the coverage area of the flexible circuit board;
the flexible circuit board coverage area is provided with a plurality of conductive line segments and a plurality of second binding terminals, the conductive line segments are respectively arranged on two sides of the flexible circuit board coverage area, and the second binding terminals are arranged between the conductive line segments on the two sides; each conductive line segment is electrically connected with the corresponding test wire, and each second binding terminal is bound with the signal wire in the display panel.
7. The display panel of claim 1, wherein the set of test traces includes a plurality of test traces, the exposed ends resulting from dicing the test traces;
a test terminal is arranged corresponding to each test wire; the test terminal is electrically connected with the test wire; the test terminal is arranged outside the coverage area of the flexible circuit board;
the flexible circuit board covering area is provided with a plurality of first binding terminals and a plurality of second binding terminals, the first binding terminals are respectively arranged on two sides of the flexible circuit board covering area, and the second binding terminals are arranged between the first binding terminals on the two sides;
The test wiring corresponding to each first binding terminal is electrically connected, and each second binding terminal is bound with the signal wiring in the display panel.
8. A display device, comprising the display panel according to any one of claims 1 to 7 and a flexible circuit board, wherein the flexible circuit board is disposed corresponding to the flexible circuit board covering area, one end of the flexible circuit board is fixed to the flexible circuit board covering area, and the other end of the flexible circuit board is bent downward along the back surface of the display panel to cover the exposed end exposed at the flexible circuit board covering area.
9. The display device according to claim 8, wherein the flexible circuit board is a chip on film, and the control signal line of the display panel is connected to the ground pin of the chip on film in a bonding manner.
10. A display mother board is characterized by comprising a plurality of uncut initial display panels, wherein each initial display panel is internally provided with a test wiring group, the adjacent initial display panels are connected through the test wiring groups, a cutting line is preset between the adjacent initial display panels, the junction of the cutting line and the test wiring group is an exposed end of the test wiring group, and the initial display panels are cut through the preset cutting line to form the display panel according to any one of claims 1 to 7.
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| CN202111194932.0A CN113641019B (en) | 2021-10-14 | 2021-10-14 | Display panel, display device and display mother board |
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| CN202111194932.0A CN113641019B (en) | 2021-10-14 | 2021-10-14 | Display panel, display device and display mother board |
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| CN113641019B (en) | 2022-02-18 |
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