CN114122051A - Display panel, manufacturing method thereof and display device - Google Patents
Display panel, manufacturing method thereof and display device Download PDFInfo
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- CN114122051A CN114122051A CN202111299350.9A CN202111299350A CN114122051A CN 114122051 A CN114122051 A CN 114122051A CN 202111299350 A CN202111299350 A CN 202111299350A CN 114122051 A CN114122051 A CN 114122051A
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L27/00—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate
- H01L27/15—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate including semiconductor components with at least one potential-jump barrier or surface barrier specially adapted for light emission
- H01L27/153—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate including semiconductor components with at least one potential-jump barrier or surface barrier specially adapted for light emission in a repetitive configuration, e.g. LED bars
- H01L27/156—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate including semiconductor components with at least one potential-jump barrier or surface barrier specially adapted for light emission in a repetitive configuration, e.g. LED bars two-dimensional arrays
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L27/00—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate
- H01L27/02—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate including semiconductor components specially adapted for rectifying, oscillating, amplifying or switching and having at least one potential-jump barrier or surface barrier; including integrated passive circuit elements with at least one potential-jump barrier or surface barrier
- H01L27/12—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate including semiconductor components specially adapted for rectifying, oscillating, amplifying or switching and having at least one potential-jump barrier or surface barrier; including integrated passive circuit elements with at least one potential-jump barrier or surface barrier the substrate being other than a semiconductor body, e.g. an insulating body
- H01L27/1214—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate including semiconductor components specially adapted for rectifying, oscillating, amplifying or switching and having at least one potential-jump barrier or surface barrier; including integrated passive circuit elements with at least one potential-jump barrier or surface barrier the substrate being other than a semiconductor body, e.g. an insulating body comprising a plurality of TFTs formed on a non-semiconducting substrate, e.g. driving circuits for AMLCDs
- H01L27/124—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate including semiconductor components specially adapted for rectifying, oscillating, amplifying or switching and having at least one potential-jump barrier or surface barrier; including integrated passive circuit elements with at least one potential-jump barrier or surface barrier the substrate being other than a semiconductor body, e.g. an insulating body comprising a plurality of TFTs formed on a non-semiconducting substrate, e.g. driving circuits for AMLCDs with a particular composition, shape or layout of the wiring layers specially adapted to the circuit arrangement, e.g. scanning lines in LCD pixel circuits
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L27/00—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate
- H01L27/02—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate including semiconductor components specially adapted for rectifying, oscillating, amplifying or switching and having at least one potential-jump barrier or surface barrier; including integrated passive circuit elements with at least one potential-jump barrier or surface barrier
- H01L27/12—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate including semiconductor components specially adapted for rectifying, oscillating, amplifying or switching and having at least one potential-jump barrier or surface barrier; including integrated passive circuit elements with at least one potential-jump barrier or surface barrier the substrate being other than a semiconductor body, e.g. an insulating body
- H01L27/1214—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate including semiconductor components specially adapted for rectifying, oscillating, amplifying or switching and having at least one potential-jump barrier or surface barrier; including integrated passive circuit elements with at least one potential-jump barrier or surface barrier the substrate being other than a semiconductor body, e.g. an insulating body comprising a plurality of TFTs formed on a non-semiconducting substrate, e.g. driving circuits for AMLCDs
- H01L27/1259—Multistep manufacturing methods
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- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L33/00—Semiconductor devices with at least one potential-jump barrier or surface barrier specially adapted for light emission; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof
- H01L33/005—Processes
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Abstract
The embodiment of the invention discloses a display panel, a manufacturing method thereof and a display device; the display panel comprises an array layer, a light-emitting function layer and a drive circuit layer, wherein the light-emitting function layer is positioned on the first side of the array layer, the drive circuit layer is positioned on the second side of the array layer, the drive circuit layer comprises a grid electrode drive device and an electric connection member, the electric connection member extends to one side far away from the light-emitting function layer to form a fan-out wiring, the electric connection member is electrically connected with the array layer and the drive circuit layer, and the fan-out wiring and the grid electrode drive device are positioned in a display area of the display panel; according to the invention, the fan-out wiring is formed by extending the electric connection member to one side far away from the light-emitting function layer, and the fan-out wiring and the grid drive device are arranged in the display area of the display panel, so that the edge frame of the display panel is not occupied, the display panel with real frameless display is realized, the display screen occupation ratio is improved, the frameless display of the splicing display is facilitated, the seamless splicing is convenient, and the display effect is enhanced.
Description
Technical Field
The invention relates to the field of display, in particular to a display panel, a manufacturing method thereof and a display device.
Background
In recent years, the trend of display panels is to display without frame, especially the frame has better display as the tiled display, and users prefer the frame of the display panel to be very narrow, but the frame is not really a completely frame-free display panel.
Therefore, a display panel, a method for manufacturing the same, and a display device are needed to solve the above technical problems.
Disclosure of Invention
The invention provides a display panel, a manufacturing method thereof and a display device, and the display panel can realize real frameless display.
The present invention provides a display panel including:
an array layer;
a light emitting functional layer on a first side of the array layer;
the driving circuit layer is positioned on the second side of the array layer and comprises a gate driving device and an electric connection member, the electric connection member extends to one side far away from the light-emitting function layer to form a fan-out wiring, and the electric connection member is electrically connected with the array layer and the driving circuit layer;
the fan-out routing lines and the gate driving device are located in a display area of the display panel.
Preferably, the light emitting function layer includes a plurality of light emitting units; the array layer comprises a plurality of first source-drain electrode units and a plurality of first connecting units, and the first connecting units are electrically connected with the light-emitting units and the first source-drain electrode units; the driving circuit layer comprises a plurality of second source-drain units and a plurality of second connecting units, and the second connecting units are electrically connected with the first source-drain units, the second source-drain units and the electric connecting members.
Preferably, the display panel further includes a plurality of binding terminals electrically connected to the fan-out traces, and a flexible circuit board electrically connected to the binding terminals.
Preferably, the display panel further includes an integrated circuit unit and a flexible circuit board, the integrated circuit unit is electrically connected to the fan-out trace, and the flexible circuit board is electrically connected to the fan-out trace through the integrated circuit unit; or the display panel further comprises an integrated circuit unit, a flexible circuit board and a chip on film, wherein the chip on film is electrically connected with the fan-out wiring, and the flexible circuit board and the integrated circuit unit are electrically connected with the chip on film.
Preferably, the fan-out routing comprises a first routing unit arranged at one end of the display panel and a second routing unit arranged at the other end of the display panel, and the first routing unit and the second routing unit are electrically connected with the flexible circuit board.
Preferably, the display panel further includes a test trace disposed on the same layer as the fan-out trace, and the test trace is electrically connected to the array layer or/and the driving circuit layer.
Preferably, the driving circuit layer further includes an interlayer insulating layer between the electrical connection member and the fan-out trace; the interlayer insulating layer comprises a plurality of first via holes, and the fan-out routing is electrically connected with the electric connection member through the first via holes.
The invention also provides a manufacturing method of the display panel, which comprises the following steps:
providing a substrate;
forming a light emitting function layer including a plurality of light emitting cells on the substrate;
forming an array layer electrically connected with the light emitting unit on one side of the light emitting functional layer, which is far away from the light emitting side;
forming a driving circuit layer including a gate driving device and an electrical connection member on the array layer;
forming fan-out routing wires electrically connected with the electric connection components on the driving circuit layer;
the fan-out routing lines and the gate driving device are located in a display area of the display panel.
Preferably, the step of forming the fan-out trace on the driving circuit layer to be electrically connected to the electrical connection member includes: forming a plurality of binding terminals on the driving circuit layer; forming a fan-out trace on the driving circuit layer, the fan-out trace being electrically connected with the electrical connection member and the binding terminal; and forming a flexible circuit board electrically connected with the binding terminal on the binding terminal.
The invention also provides a display device which comprises at least two spliced screens, wherein each spliced screen comprises any display panel.
The invention has the beneficial effects that: according to the invention, the fan-out wiring is formed by extending the electric connection member to one side far away from the light-emitting function layer, and the fan-out wiring and the grid drive device are arranged in the display area of the display panel, so that the edge frame of the display panel is not occupied, the display panel with real frameless display is realized, the display screen occupation ratio is improved, the frameless display of the splicing display is facilitated, the seamless splicing is convenient, and the display effect is enhanced.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a first structure of a display panel according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of a second structure of a display panel according to an embodiment of the present invention;
FIG. 3 is a schematic top view illustrating a third structure of a display panel according to an embodiment of the invention;
FIG. 4 is a schematic top view illustrating a fourth structure of a display panel according to an embodiment of the present invention;
FIG. 5 is a schematic top view illustrating a fifth structure of a display panel according to an embodiment of the present invention;
fig. 6 is a schematic top view illustrating a sixth structure of a display panel according to an embodiment of the present invention;
FIG. 7 is a schematic top view illustrating a seventh structure of a display panel according to an embodiment of the invention;
FIG. 8 is a flowchart illustrating a method for fabricating a display panel according to an embodiment of the present invention;
fig. 9 is a schematic structural diagram of a display device according to an embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention. Furthermore, it should be understood that the detailed description and specific examples, while indicating the present invention, are given by way of illustration and explanation only, and are not intended to limit the present invention. In the present invention, unless otherwise specified, the use of directional terms such as "upper" and "lower" generally means upper and lower in the actual use or operation of the device, particularly in the orientation of the figures of the drawings; while "inner" and "outer" are with respect to the outline of the device.
In recent years, the trend of display panels is to display without frame, especially the frame has better display as the tiled display, and users prefer the frame of the display panel to be very narrow, but the frame is not really a completely frame-free display panel.
Referring to fig. 1 to 7, an embodiment of the invention provides a display panel 100, including:
an array layer 200;
a light emitting function layer 300 on a first side of the array layer 200;
a driving circuit layer 400 located at the second side of the array layer 200, wherein the driving circuit layer 400 includes a gate driving device and an electrical connection member 410, the electrical connection member 410 extends to a side away from the light emitting function layer 300 to form a fan-out trace 420, and the electrical connection member 410 is electrically connected to the array layer 200 and the driving circuit layer 400;
the fan-out traces 420 and the gate driving device are located in the display area a of the display panel 100.
According to the invention, the fan-out wiring is formed by extending the electric connection member to one side far away from the light-emitting function layer, and the fan-out wiring and the grid drive device are arranged in the display area of the display panel, so that the edge frame of the display panel is not occupied, the display panel with real frameless display is realized, the display screen occupation ratio is improved, the frameless display of the splicing display is facilitated, the seamless splicing is convenient, and the display effect is enhanced.
The technical solution of the present invention will now be described with reference to specific embodiments.
In this embodiment, referring to fig. 1 specifically, the display panel 100 includes a substrate 101, a light-emitting functional layer 300 located on the substrate 101, an array layer 200 located on the light-emitting functional layer 300, and a driving circuit layer 400 located on the array layer 200.
In the present embodiment, referring to fig. 1 specifically, the light emitting function layer 300 is located on a first side of the array layer 200; and a driving circuit layer 400 located at a second side of the array layer 200.
In some embodiments, referring to fig. 1 in particular, the light-emitting functional layer 300 includes a plurality of light-emitting units 310, each of the light-emitting units 310 includes a first electrode 321 and a second electrode 322, each of the first electrode 321 and the second electrode 322 may be a positive electrode and a negative electrode, the light-emitting functional layer 300 further includes a common electrode line 330 electrically connected to the first electrode 321 or the second electrode 322, each of the common electrode line 330 may be a VSS electrode, and each of the VSS electrodes may be electrically connected to a negative electrode of the light-emitting unit 310.
In some embodiments, referring to fig. 1 and fig. 2, the array layer 200 includes a plurality of first active cells 240, first gate cells 230 corresponding to the first active cells 240, first source/drain cells 210, and first connection cells 220. The first connection unit 220 electrically connects the light emitting unit 310 and the first source/drain unit 210, and the first connection unit 220 may be connected to the anode of the light emitting unit 310.
In some embodiments, referring to fig. 1 in particular, the light-emitting functional layer 300 further includes an auxiliary electrode 323 connecting the first connecting unit 220 and the first electrode 321, where the second electrode 322 is electrically connected to a common electrode line 330, and the first electrode 321 is electrically connected to the first connecting unit 220, which is merely an example and can be replaced correspondingly.
In some embodiments, referring to fig. 1 and fig. 2, the driving circuit layer 400 includes a plurality of second active cells 460, second gate cells 450 corresponding to the second active cells 460, second source/drain cells 430, and second connection cells 440. The second connection unit 440 electrically connects the first source-drain unit 210 and the second source-drain unit 430.
In some embodiments, referring specifically to fig. 1, the driving circuit layer 400 further includes a plurality of gate driving devices, and the gate driving devices are represented by a gate driving device region 401.
In some embodiments, referring to fig. 1 specifically, the driving circuit layer 400 further includes an electrical connection member 410 electrically connected to the second source/drain unit 430 or/and the second connection unit 440, the electrical connection member 410 extends to a side away from the light-emitting function layer 300 to form a fan-out trace 420, and the electrical connection member 410 is electrically connected to the array layer 200 and the driving circuit layer 400. The fan-out routing 420 and the gate driving device are located in the display area a of the display panel 100.
In the figure, the fan-out trace 420 is represented by a fan-out trace area 430, the gate driving device area 401 represents the gate driving device, and the dotted line represents the light propagation direction of the light emitting unit 310. The fan-out wiring 420 and the gate driving device are arranged in the display area A of the display panel 100, the edge frame of the display panel 100 is not occupied, the display panel 100 which is really displayed without a frame is realized, the display screen occupation ratio is improved, the frame-free display of splicing display is facilitated, the seamless splicing is convenient, and the display effect is enhanced.
In some embodiments, referring to fig. 3 specifically, the display panel 100 includes a display area a and a non-display area located at the periphery of the display area a, and since the fan-out routing 420 and the gate driving device are located in the display area a, the area of the non-display area may be further reduced, so as to implement true frameless display.
In some embodiments, the non-display area may be only a tolerance film layer or a film layer for blocking water and oxygen, which is only an example and not a specific limitation.
In some embodiments, referring to fig. 2 to 4, the display panel 100 further includes a plurality of binding terminals 510 electrically connected to the fan-out traces 420 and a flexible circuit board 500 electrically connected to the binding terminals 510. The flexible circuit board 500 may be an FPC, and this structure has an advantage of a small number of times of binding, and circuit control conduction can be achieved only by once binding the flexible circuit board 500 and the binding terminal 510.
In some embodiments, if the fan-out trace 420 is directly bonded to the flexible circuit board 500 after being connected to the bonding terminals 510, the number of the bonding terminals 510 required is large.
Specifically referring to fig. 5, the display panel 100 further includes an integrated circuit unit 600 and a flexible circuit board 500, the integrated circuit unit 600 is electrically connected to the fan-out trace 420, and the flexible circuit board 500 is electrically connected to the fan-out trace 420 through the integrated circuit unit 600.
Fan-out walk line 420 direct with integrated circuit unit 600 carries out the electricity and connects, through integrated circuit unit 600(IC) with flexible circuit board 500 binds, no longer need a large amount of terminals 510 of binding, only need carry out twice and connect and bind, can realize that fan-out walk line 420 and flexible circuit board 500 bind at the display panel 100 back and switch on, can realize that circuit control switches on, do not occupy the positive frame of display panel 100, realized the display panel 100 of true frameless demonstration, improved the display screen and accounted for the ratio, be favorable to the frameless demonstration of concatenation demonstration, make things convenient for seamless concatenation, strengthened the display effect.
In some embodiments, the fan-out traces 420 directly connected with the integrated circuit cell 600 requires a more complex process due to the smaller size of the integrated circuit cell 600.
Specifically referring to fig. 6, the display panel 100 further includes an integrated circuit unit 600, a flexible circuit board 500, and a chip on film 700, wherein the chip on film 700 is electrically connected to the fan-out traces 420, and the flexible circuit board 500 and the integrated circuit unit 600 are electrically connected to the chip on film 700.
The size of the chip on film 700(COF) can be conveniently set, the fan-out wiring 420 is firstly connected with the chip on film 700, the integrated circuit unit 600 reaches the flexible circuit board 500 is then electrically connected with the chip on film 700, and the chip on film 700 is used as an intermediate unit, so that circuit control conduction is conveniently realized, the front frame of the display panel 100 is not occupied, the display panel 100 which is really displayed without the frame is realized, the display screen occupation ratio is improved, the frameless display of splicing display is facilitated, seamless splicing is convenient, and the display effect is enhanced.
In some embodiments, if the fan-out traces 420 are only disposed at one end of the display panel 100, the circuit is complex, the difficulty of the wire arrangement process is high, and meanwhile, the longer the traces are, the more obvious the voltage drop on the traces is, the larger the voltage drop difference at different positions of the display panel 100 is, which may also cause non-uniform display brightness.
Referring to fig. 7, the fan-out trace 420 includes a first trace unit 421 disposed at one end of the display panel 100 and a second trace unit 422 disposed at the other end of the display panel 100, and the first trace unit 421 and the second trace unit 422 are electrically connected to the flexible circuit board 500.
Will fan-out is walked line 420 and is divided into first line unit 421 with the second is walked line unit 422, will first line unit 421 with the second is walked line unit 422 and is set up display panel 100's relative both ends, and for the convenience of explanation, the relative both ends are first end and second end, will walk the line and divide into two parts, utilize principle nearby, are close to the electric wire of first end with first line unit 421 of walking connects the fan-out, are close to the electric wire of second end with the second is walked line unit 422 and is connected the fan-out, sets up display panel 100's middle zone's flexible circuit board 500 has reduced the reason line technology degree of difficulty, simultaneously, reduces to walk line length, reduces the pressure drop, improves the inhomogeneous problem of demonstration luminance.
In some embodiments, the display panel 100 further includes a test trace disposed on the same layer as the fan-out trace 420, and the test trace is electrically connected to the array layer 200 or/and the driving circuit layer 400.
The setting area of the test trace may correspond to the setting area of the fan-out trace 420, and the test trace may detect the trace in the array layer 200, the trace in the driving circuit layer 400, and the quality of the light emitting unit 310, and only needs to be electrically connected with different detection objects in advance when the display panel 100 is manufactured.
In some embodiments, referring to fig. 1 in particular, the driving circuit layer 400 further includes an interlayer insulating layer 810 between the electrical connection member 410 and the fan-out trace 420; the interlayer insulating layer 810 includes a plurality of first vias 811, and the fan-out trace 420 is electrically connected to the electrical connection member 410 through the first vias 811.
The electrical connection member 410 may be used as a terminal of a wire requiring a fan-out wire, and the fan-out wire 420 is electrically connected to the electrical connection member 410 by forming a first via hole 811 on the interlayer insulating layer 810, thereby fanning out the wire.
In some embodiments, the electrical connection member 410 may also be electrically connected with the first gate unit 230 of the array layer 200, fanning out the first gate unit 230.
In some embodiments, when the fan-out traces 420 include multiple types of wires, fan-out may be performed in a classified manner, at least the fan-out traces 420 are first type traces or second type traces, the types of the wires connected to the first type traces and the second type traces are different, the flexible circuit board 500 includes at least first type circuit board units and second type circuit board units, the first type traces are electrically connected to the first type circuit board units, and the second type traces are electrically connected to the second type circuit board units. The fan-out traces 420 may further include a third type trace, a fourth type trace, and the like, and it is only necessary that the flexible circuit board 500 correspondingly includes a third type circuit board unit, a fourth type circuit board unit, and the like.
In some embodiments, referring to fig. 1 and 2, the first gate unit 230 may be a single gate or a dual gate, and may be adapted to have an adjustable structure according to different requirements.
In some embodiments, referring to fig. 1 and fig. 2, the second gate unit 450 may be a single gate or a dual gate, and may be adapted to have an adjustable structure according to different requirements.
In some embodiments, the display panel 100 further includes a substrate 101 on a side of the light emitting function layer 300 away from the array layer 200, and a first organic insulating layer 821 between the light emitting function layer 300 and the substrate 101.
In some embodiments, the substrate 101 may be a glass substrate.
In some embodiments, the light emitting function layer 300 further includes a second organic insulating layer 822 between the light emitting unit 310 and the common electrode line 330.
In some embodiments, referring to fig. 1 and fig. 2 specifically, the display panel 100 further includes a third organic insulating layer 823 between the light-emitting functional layer 300 and the array layer 200, a first inorganic insulating layer 831 on the third organic insulating layer 823, a fourth organic insulating layer 824 between the first source/drain unit 210 and the driving layer, and a second inorganic insulating layer 832.
In some embodiments, the materials of the first organic insulating layer 821, the second organic insulating layer 822, the third organic insulating layer 823, the fourth organic insulating layer 824, and the interlayer insulating layer 810 may be organic insulating materials, and the organic insulating materials may be polyimides, which are only exemplary and not particularly limited.
In some embodiments, the material of the first inorganic insulating layer 831 and the second inorganic insulating layer 832 is an inorganic insulating material, and the inorganic insulating material may be any one or a combination of silicon nitride compound, silicon oxide compound, and silicon oxynitride compound, which are only examples and are not limited in particular.
In some embodiments, the light emitting unit 310 may be a Mini LED or a Micro LED.
According to the invention, the fan-out wiring is formed by extending the electric connection member to one side far away from the light-emitting function layer, and the fan-out wiring and the grid drive device are arranged in the display area of the display panel, so that the edge frame of the display panel is not occupied, the display panel with real frameless display is realized, the display screen occupation ratio is improved, the frameless display of the splicing display is facilitated, the seamless splicing is convenient, and the display effect is enhanced.
Referring to fig. 8, an embodiment of the present invention further provides a method for manufacturing a display panel 100, including:
s100, providing a substrate 101;
s200, forming a light emitting function layer 300 including a plurality of light emitting cells 310 on the substrate 101;
s300, forming an array layer 200 electrically connected with the light emitting unit 310 on the side, away from the light emitting side, of the light emitting functional layer 300;
s400, forming a driving circuit layer 400 comprising a gate driving device and an electrical connection member 410 on the array layer 200;
s500, forming a fan-out trace 420 electrically connected to the electrical connection member 410 on the driving circuit layer 400;
the fan-out traces 420 and the gate driving device are located in the display area a of the display panel 100.
According to the invention, the fan-out wiring is formed by extending the electric connection member to one side far away from the light-emitting function layer, and the fan-out wiring and the grid drive device are arranged in the display area of the display panel, so that the edge frame of the display panel is not occupied, the display panel with real frameless display is realized, the display screen occupation ratio is improved, the frameless display of the splicing display is facilitated, the seamless splicing is convenient, and the display effect is enhanced.
The technical solution of the present invention will now be described with reference to specific embodiments.
S100, a substrate 101 is provided.
In some embodiments, the substrate 101 may be a glass substrate.
S200, forming a light emitting function layer 300 including a plurality of light emitting cells 310 on the substrate 101.
In some embodiments, the light emitting unit 310 may be a Mini LED or a Micro LED.
In some embodiments, step S200 comprises:
s210, forming a plurality of light emitting units 310 on the substrate 101 by using a bulk transfer process.
In some embodiments, the light emitting cells 310 may be inspected and repaired after the plurality of light emitting cells 310 are formed.
S220, forming a second organic insulating layer 822 on the light emitting unit 310.
S230, forming a plurality of openings on the second organic insulating layer 822 to expose the electrodes of the light emitting unit 310.
S240, a metal film is formed on the second organic insulating layer 822 by a metal process to form a common electrode and an electrode for connecting the light emitting unit 310.
In some embodiments, referring to fig. 1 in particular, the light-emitting functional layer 300 includes a plurality of light-emitting units 310, each of the light-emitting units 310 includes a first electrode 321 and a second electrode 322, each of the first electrode 321 and the second electrode 322 may be a positive electrode and a negative electrode, the light-emitting functional layer 300 further includes a common electrode line 330 electrically connected to the first electrode 321 or the second electrode 322, each of the common electrode line 330 may be a VSS electrode, and each of the VSS electrodes may be electrically connected to a negative electrode of the light-emitting unit 310.
S250, a third organic insulating layer 823 and a first inorganic insulating layer 831 are formed on the common electrode.
And S300, forming an array layer 200 electrically connected with the light emitting unit 310 on the side of the light emitting functional layer 300 departing from the light emitting side.
In some embodiments, step S300 includes:
s310, forming a plurality of first active cells 240, a plurality of first gate cells 230, a plurality of first source/drain cells 210, a plurality of first connection cells 220, and an insulating material between different types of electrical devices on the first inorganic insulating layer 831.
In some embodiments, referring to fig. 1 and fig. 2, when the first connection unit 220 is formed, a plurality of openings are formed on the insulating material, the first inorganic insulating layer 831 and the third organic insulating layer 823, so that the anode of the light emitting unit 310 is exposed or the connection terminal of the anode is exposed, and the first connection unit 220 and the first source/drain unit 210 are disposed at the same layer.
S320, forming a fourth organic insulating layer 824 and a second inorganic insulating layer 832 on the first source-drain unit 210 and the first connection unit 220.
S400, forming a driving circuit layer 400 including a gate driving device and an electrical connection member 410 on the array layer 200.
In some embodiments, step S400 includes:
s410, forming a plurality of second active units 460, a plurality of second gate units 450, a plurality of second source/drain units 430, a plurality of second connection units 440, a plurality of electrically connecting members 410, and an insulating material between different types of electrical components on the second inorganic insulating layer 832.
In some embodiments, referring to fig. 1 and fig. 2, the gate driving device includes the second source/drain unit 430, the second gate unit 450, and the second active unit 460.
In some embodiments, referring to fig. 1 and fig. 2 specifically, when the second connection unit 440 is formed, a plurality of openings are formed on the insulating material, the second inorganic insulating layer 832 and the fourth organic insulating layer 824, so that the first source/drain unit 210 is exposed, and the second connection unit 440, the electrical connection member 410 and the second source/drain unit 430 are disposed at the same layer.
S420, forming an interlayer insulating layer 810 on the second connection unit 440, the electrical connection member 410, and the second source/drain unit 430.
S500, forming a fan-out trace 420 electrically connected to the electrical connection member 410 on the driving circuit layer 400.
In some embodiments, step S500 comprises:
s510, forming a plurality of openings on the interlayer insulating layer 810 to expose the electrical connection members 410.
And S520, forming a fan-out routing 420 on the interlayer insulating layer 810.
In some embodiments, the fan-out trace 420 is electrically connected with the electrical connection member 410.
In some embodiments, the fan-out traces 420 and the gate driving device are located in the display area a of the display panel 100.
In some embodiments, step S520 may include:
s521a, a plurality of binding terminals 510 are formed on the interlayer insulating layer 810.
S522a, forming a plurality of fan-out traces 420 on the interlayer insulating layer 810.
S523a, forming a flexible circuit board 500 on the binding terminal 510.
Specifically referring to fig. 2 to 4, the display panel 100 further includes a plurality of binding terminals 510 electrically connected to the fan-out traces 420 and a flexible circuit board 500 electrically connected to the binding terminals 510. The flexible circuit board 500 may be an FPC, and this structure has an advantage of a small number of times of binding, and circuit control conduction can be achieved only by once binding the flexible circuit board 500 and the binding terminal 510.
In some embodiments, step S520 may include:
s521b, forming a plurality of fan-out traces 420 on the interlayer insulating layer 810.
S522b, forming an integrated circuit unit 600 on the fan-out trace 420.
S523b, forming the flexible circuit board 500 on the integrated circuit unit 600.
In some embodiments, if the fan-out trace 420 is directly bonded to the flexible circuit board 500 after being connected to the bonding terminals 510, the number of the bonding terminals 510 required is large.
Specifically referring to fig. 5, the display panel 100 further includes an integrated circuit unit 600 and a flexible circuit board 500, the integrated circuit unit 600 is electrically connected to the fan-out trace 420, and the flexible circuit board 500 is electrically connected to the fan-out trace 420 through the integrated circuit unit 600.
Fan-out walk line 420 direct with integrated circuit unit 600 carries out the electricity and connects, through integrated circuit unit 600(IC) with flexible circuit board 500 binds, no longer need a large amount of terminals 510 of binding, only need carry out twice and connect and bind, can realize that fan-out walk line 420 and flexible circuit board 500 bind at the display panel 100 back and switch on, can realize that circuit control switches on, do not occupy the positive frame of display panel 100, realized the display panel 100 of true frameless demonstration, improved the display screen and accounted for the ratio, be favorable to the frameless demonstration of concatenation demonstration, make things convenient for seamless concatenation, strengthened the display effect.
In some embodiments, step S520 may include:
s521c, forming a plurality of fan-out traces 420 on the interlayer insulating layer 810.
S522c, forming a flip chip film 700 on the fan-out trace 420.
S523c, forming an integrated circuit unit 600 and a flexible circuit board 500 on the chip on film 700.
In some embodiments, the fan-out traces 420 directly connected with the integrated circuit cell 600 requires a more complex process due to the smaller size of the integrated circuit cell 600.
Specifically referring to fig. 6, the display panel 100 further includes an integrated circuit unit 600, a flexible circuit board 500, and a chip on film 700, wherein the chip on film 700 is electrically connected to the fan-out traces 420, and the flexible circuit board 500 and the integrated circuit unit 600 are electrically connected to the chip on film 700.
The size of the chip on film 700(COF) can be conveniently set, the fan-out wiring 420 is firstly connected with the chip on film 700, the integrated circuit unit 600 reaches the flexible circuit board 500 is then electrically connected with the chip on film 700, and the chip on film 700 is used as an intermediate unit, so that circuit control conduction is conveniently realized, the front frame of the display panel 100 is not occupied, the display panel 100 which is really displayed without the frame is realized, the display screen occupation ratio is improved, the frameless display of splicing display is facilitated, seamless splicing is convenient, and the display effect is enhanced.
In some embodiments, the method for manufacturing the display panel 100 further includes:
in some embodiments, if the fan-out traces 420 are only disposed at one end of the display panel 100, the circuit is complex, the difficulty of the wire arrangement process is high, and meanwhile, the longer the traces are, the more obvious the voltage drop on the traces is, the larger the voltage drop difference at different positions of the display panel 100 is, which may also cause non-uniform display brightness.
Referring to fig. 7, the fan-out trace 420 includes a first trace unit 421 disposed at one end of the display panel 100 and a second trace unit 422 disposed at the other end of the display panel 100, and the first trace unit 421 and the second trace unit 422 are electrically connected to the flexible circuit board 500.
Will fan-out is walked line 420 and is divided into first line unit 421 with the second is walked line unit 422, will first line unit 421 with the second is walked line unit 422 and is set up display panel 100's relative both ends, and for the convenience of explanation, the relative both ends are first end and second end, will walk the line and divide into two parts, utilize principle nearby, are close to the electric wire of first end with first line unit 421 of walking connects the fan-out, are close to the electric wire of second end with the second is walked line unit 422 and is connected the fan-out, sets up display panel 100's middle zone's flexible circuit board 500 has reduced the reason line technology degree of difficulty, simultaneously, reduces to walk line length, reduces the pressure drop, improves the inhomogeneous problem of demonstration luminance.
In some embodiments, the display panel 100 further includes a test trace disposed on the same layer as the fan-out trace 420, and the test trace is electrically connected to the array layer 200 or/and the driving circuit layer 400.
The setting area of the test trace may correspond to the setting area of the fan-out trace 420, and the test trace may detect the trace in the array layer 200, the trace in the driving circuit layer 400, and the quality of the light emitting unit 310, and only needs to be electrically connected with different detection objects in advance when the display panel 100 is manufactured.
According to the invention, the fan-out wiring is formed by extending the electric connection member to one side far away from the light-emitting function layer, and the fan-out wiring and the grid drive device are arranged in the display area of the display panel, so that the edge frame of the display panel is not occupied, the display panel with real frameless display is realized, the display screen occupation ratio is improved, the frameless display of the splicing display is facilitated, the seamless splicing is convenient, and the display effect is enhanced.
Referring to fig. 9, an embodiment of the present invention further provides a display device 10, which includes at least two tiled screens 20, where the tiled screens 20 include the display panel 100 as described above.
Please refer to fig. 1 to 7 of any of the embodiments of the display panel 100, which are not described herein again.
In this embodiment, the splicing screen 20 may further include a middle frame, a frame adhesive, and the like, which is not limited herein.
The embodiment of the invention discloses a display panel, a manufacturing method thereof and a display device; the display panel comprises an array layer, a light-emitting function layer and a drive circuit layer, wherein the light-emitting function layer is positioned on the first side of the array layer, the drive circuit layer is positioned on the second side of the array layer, the drive circuit layer comprises a grid electrode drive device and an electric connection member, the electric connection member extends to one side far away from the light-emitting function layer to form a fan-out wiring, the electric connection member is electrically connected with the array layer and the drive circuit layer, and the fan-out wiring and the grid electrode drive device are positioned in a display area of the display panel; according to the invention, the fan-out wiring is formed by extending the electric connection member to one side far away from the light-emitting function layer, and the fan-out wiring and the grid drive device are arranged in the display area of the display panel, so that the edge frame of the display panel is not occupied, the display panel with real frameless display is realized, the display screen occupation ratio is improved, the frameless display of the splicing display is facilitated, the seamless splicing is convenient, and the display effect is enhanced.
The display panel, the manufacturing method thereof, and the display device provided in the embodiments of the present invention are described in detail above, and the principles and embodiments of the present invention are explained in this document by applying specific examples, and the description of the embodiments above is only used to help understanding the method and the core idea of the present invention; meanwhile, for those skilled in the art, according to the idea of the present invention, there may be variations in the specific embodiments and the application scope, and in summary, the content of the present specification should not be construed as a limitation to the present invention.
Claims (10)
1. A display panel, comprising:
an array layer;
a light emitting functional layer on a first side of the array layer;
the driving circuit layer is positioned on the second side of the array layer and comprises a gate driving device and an electric connection member, the electric connection member extends to one side far away from the light-emitting function layer to form a fan-out wiring, and the electric connection member is electrically connected with the array layer and the driving circuit layer;
the fan-out routing lines and the gate driving device are located in a display area of the display panel.
2. The display panel according to claim 1, wherein the light-emitting functional layer includes a plurality of light-emitting units;
the array layer comprises a plurality of first source-drain electrode units and a plurality of first connecting units, and the first connecting units are electrically connected with the light-emitting units and the first source-drain electrode units;
the driving circuit layer comprises a plurality of second source-drain units and a plurality of second connecting units, and the second connecting units are electrically connected with the first source-drain units, the second source-drain units and the electric connecting members.
3. The display panel of claim 1, further comprising a plurality of binding terminals electrically connected with the fan-out traces and a flexible circuit board electrically connected with the binding terminals.
4. The display panel of claim 1, further comprising an integrated circuit unit electrically connected to the fan-out traces and a flexible circuit board electrically connected to the fan-out traces through the integrated circuit unit; or
The display panel further comprises an integrated circuit unit, a flexible circuit board and a chip on film, wherein the chip on film is electrically connected with the fan-out wiring, and the flexible circuit board and the integrated circuit unit are electrically connected with the chip on film.
5. The display panel according to claim 3 or 4, wherein the fan-out traces comprise a first trace unit disposed at one end of the display panel and a second trace unit disposed at the other end of the display panel, and the first trace unit and the second trace unit are electrically connected to the flexible circuit board.
6. The display panel according to claim 3 or 4, wherein the display panel further comprises a test trace disposed on the same layer as the fan-out trace, and the test trace is electrically connected to the array layer or/and the driving circuit layer.
7. The display panel of claim 1, wherein the driving circuit layer further comprises an interlayer insulating layer between the electrical connection member and the fan-out trace;
the interlayer insulating layer comprises a plurality of first via holes, and the fan-out routing is electrically connected with the electric connection member through the first via holes.
8. A method for manufacturing a display panel is characterized by comprising the following steps:
providing a substrate;
forming a light emitting function layer including a plurality of light emitting cells on the substrate;
forming an array layer electrically connected with the light emitting unit on one side of the light emitting functional layer, which is far away from the light emitting side;
forming a driving circuit layer including a gate driving device and an electrical connection member on the array layer;
forming fan-out routing wires electrically connected with the electric connection components on the driving circuit layer;
the fan-out routing lines and the gate driving device are located in a display area of the display panel.
9. The method of claim 8, wherein the step of forming the fan-out traces on the driving circuit layer to be electrically connected to the electrical connection members comprises:
forming a plurality of binding terminals on the driving circuit layer;
forming a fan-out trace on the driving circuit layer, the fan-out trace being electrically connected with the electrical connection member and the binding terminal;
and forming a flexible circuit board electrically connected with the binding terminal on the binding terminal.
10. A display device comprising at least two tiled screens, the tiled screens comprising the display panel of any of claims 1 to 7.
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| EP4239680A1 (en) * | 2022-03-03 | 2023-09-06 | Samsung Display Co., Ltd. | Display device and tiled display device including the same |
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| CN114122051B (en) | 2023-07-25 |
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