CN115691311A - Display assembly and display device - Google Patents

Abstract

The invention provides a display assembly and a display device, belongs to the technical field of display driving, and can at least partially solve the problem of uneven driving signals in the existing foldable display device. The display assembly comprises a display substrate and a plurality of driving units, wherein the display substrate comprises a display area, a lead-in area surrounding the display area, and a binding area which is positioned on one side of the display area in the first direction and is farther away from the display area than the lead-in area on the side; the lead-in area is provided with lead-in lines for providing driving signals for the display area; the drive unit is bound and connected with the binding area; the display substrate is provided with a flexible bending part penetrating along a first direction; the plurality of driving units are arranged along a second direction crossed with the first direction and are respectively positioned at two sides of the bending part in the second direction; each driving unit comprises a plurality of output ends arranged along the second direction; each lead-in is connected to at least one output and at least some of the lead-ins are connected to a plurality of outputs of different drive units.

Description

Display assembly and display device

Technical Field

The invention belongs to the technical field of display driving, and particularly relates to a display assembly and a display device.

Background

The pixel units of the display substrate need some driving signals, and the driving signals can be provided by a Chip On Film (COF) bound in the middle of one side of the display substrate.

In a foldable display device, the display substrate has a flexible bending portion, and the bending portion is usually located at the middle position of the display substrate. Because the bending portion may be deformed and the flip chip cannot be disposed, the driving signal cannot be introduced from the middle position of the display substrate, which causes the driving signal obtained by the display units at different positions of the display substrate to be non-uniform and affects the uniformity of the display effect.

In particular, the large-sized display device is not suitable for introducing driving signals at two opposite sides (e.g., left and right sides), which is prone to cause problems such as excessive current heating, and the like, so that the above problem of non-uniformity of the driving signals is further aggravated.

Disclosure of Invention

The invention provides a display assembly and a display device, which can at least partially solve the problem of uneven driving signals in the existing foldable display device.

In a first aspect, embodiments of the present invention provide a display assembly, comprising a display substrate and a plurality of driving units, wherein,

the display substrate comprises a display area, a lead-in area surrounding the display area, and a binding area which is positioned on one side of the display area in the first direction and is farther away from the display area than the lead-in area on the side; the lead-in area is provided with a lead-in wire for providing a driving signal for the display area; the drive unit is bound and connected with the binding area;

the display substrate is provided with a flexible bending part penetrating along a first direction; the driving units are arranged along a second direction crossed with the first direction and are respectively positioned at two sides of the bending part in the second direction;

each driving unit comprises a plurality of output ends arranged along a second direction; each drop wire is connected to at least one output terminal and at least some of the drop wires are connected to a plurality of output terminals of different drive units.

Optionally, the lead-in lines include positive lead-in lines for providing a positive driving signal to the display area; the positive lead-in wire is positioned between the display area and the binding area and extends along the second direction;

the output end comprises a positive output end connected with a positive lead-in wire; each of the driving units includes two positive electrode output terminals.

Optionally, the lead-in wires further include a negative lead-in wire for providing a negative driving signal to the display area;

the output end also comprises a negative electrode output end connected with the negative electrode lead-in wire; each of the driving units includes at least two negative output terminals.

Optionally, the negative lead-in wires include a first negative lead-in wire located between the display area and the binding area and extending along the second direction; any two adjacent driving units in the second direction correspond to one first negative lead-in wire;

the negative output end comprises a first negative output end connected with the first negative lead-in wire; two ends of each first negative lead-in wire are respectively connected with one first negative output end of the corresponding two driving units; and in the second direction, each of the two first negative output ends connected with one first negative lead-in wire is closer to the other first negative output end than any positive output end on the driving unit where the first negative lead-in wire is located.

Optionally, the negative lead-in wires include a second negative lead-in wire located between the display region and the binding region and extending along a second direction; each driving unit corresponds to one second negative lead-in wire;

the negative output end comprises a second negative output end connected with a second negative lead-in wire; each of the drive units comprises at least one first output terminal located between two positive output terminals thereof in the second direction; each second negative lead-in wire is connected with all the second negative output ends of the corresponding driving units.

Optionally, except for the two driving units located at the two ends in the second direction, each of the other driving units includes two second negative output ends, and the two second negative output ends are respectively connected to two ends of one second negative lead-in wire;

the two driving units positioned at the two ends in the second direction respectively comprise a second negative electrode output end, and the second negative electrode output end is connected with one end, close to the bent part, of a second negative electrode lead-in wire.

Optionally, the negative lead-in wires include a third negative lead-in wire; the third negative lead-in wires surround the display area at the other sides except the side where the binding area is located;

the negative output end comprises a third negative output end connected with a third negative lead-in wire; the two driving units positioned at the two ends in the second direction respectively comprise a third negative electrode output end, and the two third negative electrode output ends are respectively connected with the two ends of a third negative electrode lead-in wire; in the second direction, each third negative electrode output end is farther from the bending part than any positive electrode output end of the driving unit where the third negative electrode output end is located.

Optionally, the lead-in wires further include an initialization lead-in wire for providing an initialization driving signal to the display area; the initialization lead-in wire is positioned between the display area and the binding area and extends along a second direction;

the output end also comprises an initialization output end connected with the initialization lead-in wire; each positive output end corresponds to two initialization output ends; in each driving unit, in the second direction, two initialization output ends corresponding to each positive output end are respectively located on two sides of the positive output end, and no negative output end exists between the positive output end and the corresponding initialization output end.

Optionally, the initialization lead-in is closer to the display area than the positive lead-in.

Optionally, any negative lead-in wire arranged in the lead-in area between the display area and the binding area is farther away from the display area than the positive lead-in wire.

Optionally, the bonding region is provided with a plurality of bonding pads sequentially arranged in the second direction; the bonding pad is connected with the output end; at least a part of the pads are connected to lead-in wires by connection wires extending in a first direction to connect the lead-in wires with output terminals.

Optionally, at least some of the outputs are redundant outputs not connected to a drop line.

Optionally, the driving unit includes at least one of:

a chip on film;

a driving chip;

the circuit board assembly comprises a circuit board and a driving chip connected with the circuit board.

Optionally, in the second direction, the bending part is located in the middle of the display substrate;

the number of the driving units positioned at two sides of the bending part in the second direction is equal, and the driving units are symmetrically arranged relative to the bending part.

In a second aspect, an embodiment of the present invention further provides a display device, which includes any one of the display assemblies described above.

Drawings

FIG. 1 is a schematic diagram illustrating the distribution of various structures in a display module according to an embodiment of the present invention;

FIG. 2 is a schematic side view of a display substrate of a display device according to an embodiment of the present invention when the display substrate is bent;

FIG. 3 is a circuit diagram of a pixel circuit in a pixel unit of a display substrate of a display device according to an embodiment of the invention;

FIG. 4 is a schematic top view of a display module according to an embodiment of the present invention;

FIG. 5 is a schematic diagram of an enlarged top view of a portion of the display assembly of FIG. 4 within the dotted line frame A;

FIG. 6 is a block diagram of a display device according to an embodiment of the present invention;

wherein the reference numbers are:

2. a drive unit; 3. an output end; 31. an anode output end; 321. a first negative output terminal; 322. a second negative output terminal; 323. a third negative output terminal; 33. initializing an output end; 34. a GOA output end; 39. a redundant output terminal; 4. a lead-in wire; 41. a positive lead-in wire; 421. a first negative lead-in wire; 422. a second negative lead-in wire; 423. a third negative lead-in wire; 43. initializing a lead-in wire; 51. a bonding pad; 52. a connecting wire; 9. a display substrate; 91. a display area; 92. a lead-in zone; 93. a binding region; 99. a bending section; t1, a first transistor; t2, a second transistor; t3, a third transistor; t4, a fourth transistor; t5, a fifth transistor; t6 and a sixth transistor; t7, a seventh transistor; cst, storage capacitor; D. a light emitting device.

Detailed Description

In order to make the technical solutions of the present invention better understood, the present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.

It is to be understood that the specific embodiments and figures described herein are merely illustrative of the invention and are not limiting of the invention.

It is to be understood that the embodiments of the invention and the features of the embodiments can be combined with each other without conflict.

It is to be understood that, for the convenience of description, only portions related to embodiments of the present invention are shown in the drawings, and portions not related to embodiments of the present invention are not shown in the drawings.

Noun interpretation

In the embodiments of the present invention, unless otherwise specified, the following technical terms should be understood according to the following explanations:

"the lead extends in a certain direction" merely means that the overall extending direction of the lead is the direction, that is, a line connecting both ends of the lead is parallel or approximately parallel to the direction, and does not mean that any position of the lead is strictly parallel to the direction.

"layered" of structures means that the structures are formed from the same layer of material and thus are in layered relationship in the same layer, but do not represent that they are equidistant from the substrate, nor that they are completely identical to the structure of other layers between the substrate.

Detailed Description

In a first aspect, referring to fig. 1 to 5, an embodiment of the present invention provides a display assembly, which includes a display substrate 9 and a plurality of driving units 2.

Referring to fig. 1, the display module according to the embodiment of the present invention includes a display substrate 9 for displaying, and a plurality of driving units 2 bound to the display substrate 9, where the driving units 2 are configured to provide driving signals for implementing display to the display substrate 9.

In the display module according to the embodiment of the present invention, the display substrate 9 includes a display area 91, a lead-in area 92 surrounding the display area 91, and a bonding area 93 located on one side of the display area 91 in the first direction 981 and farther from the display area 91 than the lead-in area 92 on the one side; the lead-in area 92 is provided with lead-in lines 4 for supplying driving signals to the display area 91; the drive unit 2 is bound and connected with the binding region 93; the display substrate 9 has a flexible bending portion 99 penetrating in a first direction 981; the plurality of driving units 2 are arranged along a second direction 982 intersecting the first direction 981, and are respectively located at two sides of the bending portion 99 in the second direction 982; each drive unit 2 comprises a plurality of output terminals 3 arranged in a second direction 982; each lead-in 4 is connected to at least one output 3 and at least some of the lead-ins 4 are connected to a plurality of outputs 3 of different drive units 2.

Referring to fig. 1, the display substrate 9 is a structure having a plate shape as a whole, and may include a base, and various structures provided on the base. In the embodiment of the present invention, the display substrate 9 includes a display area 91 for displaying, and a plurality of pixel units are disposed in the display area 91, where each pixel unit is a minimum unit capable of emitting light independently to display a desired content, for example, a "sub-pixel".

Each pixel unit is provided with a pixel circuit for emitting light, such as the pixel circuit shown in fig. 3, which includes a first transistor T1, a second transistor T2, a third transistor T3, a fourth transistor T4, a fifth transistor T5, a sixth transistor T6, a seventh transistor T7, and a storage capacitor Cst, and these devices can drive a light emitting device D such as an Organic Light Emitting Diode (OLED) to emit light; since the pixel circuit has seven transistors and one capacitor, it is referred to as a 7T1C pixel circuit.

The pixel circuit (pixel unit) may be operated by a plurality of driving signals, and the driving signals may include an anode driving signal (VDD in fig. 3) for supplying power to an anode (anode) of the organic light emitting diode, a cathode driving signal (VSS in fig. 3) for supplying power to a cathode (cathode) of the organic light emitting diode, an initialization driving signal (Vinit in fig. 3) for starting the operation of the pixel circuit, a Data driving signal (Data in fig. 3) for controlling light emitting brightness of the light emitting device D, a Gate driving signal (Gate in fig. 3) for controlling writing of the Data driving signal, a switch driving signal (EM in fig. 3) for controlling whether the light emitting device D can emit light, a Reset driving signal (Reset and Reset') in fig. 3 for starting a light emitting process of a new frame, and the like.

Of course, the specific forms of the pixel circuit and the driving signal are not limited to this, but the positive driving signal (VDD), the negative driving signal (VSS), and the initialization driving signal (Vinit) may be required in various forms of pixel circuits, and will not be described in detail here.

Referring to fig. 1, a lead-in region 92 (or referred to as an edge region, a peripheral region, etc.) is disposed around the periphery of the display region 91, and the lead-in region 92 is used for disposing edge circuits (such as a gate driving circuit), leads, etc. and may correspond to a frame of the display device. In the embodiment of the present invention, at least the lead-in lines 4 are disposed in the lead-in area 92, and the lead-in lines 4 are used for introducing the above driving signals into the display area 91 and finally into the corresponding positions of the pixel circuits.

The way in which the lead-in lines 4 lead in the drive signals into the display area 91 is various. For example, signal lines (e.g., grid-shaped signal lines) connected to each pixel unit may be provided in the display region 91, and the signal lines may be connected to the lead-in lines 4 in the lead-in region 92, thereby introducing a driving signal into the display region 91; for another example, a part of the structure of each pixel circuit in the display region 91 may be a sheet structure (for example, the cathodes of each organic light emitting diode may be connected to one sheet), and the sheet structure is connected to the lead-in line 4 in the lead-in region 92.

Obviously, the lead-in wires 4 may not be ideal conductors, but necessarily have a certain resistance, so that there may be attenuation (e.g. IR Drop) in the signals, i.e. there may be differences in the driving signals at different distances from the actual signal source (e.g. the output terminal 3, similar descriptions follow) in the lead-in wires 4, and thus, there may be differences in the driving signals introduced into the display area 91 from different positions of the lead-in wires 4, and such differences may cause different display effects at different positions (different pixel units) of the display area 91, i.e. affect the uniformity (uniformity) of the display.

Referring to fig. 1, a side of the display area 91 along a first direction 981 (e.g., "longitudinal direction") is further provided with a binding area 93, and the binding area 93 is located outside the lead-in area 92 of the side. And a plurality of driving units 2 are bound and connected to the binding region 93 and are sequentially arranged along the second direction 982, i.e. different driving units 2 are connected at different positions along the second direction 982.

Meanwhile, each of the driving units 2 has a plurality of output terminals 3 sequentially arranged in the second direction 982, and thus, all of the output terminals 3 are also sequentially arranged at different positions in the second direction 982.

Wherein the output terminal 3 is connected to the above lead-in wire 4 and provides the above driving signal to the lead-in wire 4 (i.e. the output terminal 3 is the actual signal source for the display panel 9). Furthermore, in the above lead-in wires 4, at least some of the lead-in wires 4 are connected to the output terminals 3 of a plurality of different driving units 2 at the same time, that is, the corresponding output terminals 3 of these lead-in wires 4 can be located at a plurality of positions with a larger difference in the second direction 982, so that these lead-in wires 4 also obtain driving signals from a plurality of positions with a larger difference in the second direction 982.

Here, the second direction 982 is a direction intersecting the first direction 981, i.e., the second direction 982 cannot be parallel to the first direction 981.

For example, referring to fig. 1 and 4, the second direction 982 may be perpendicular to the first direction 981, i.e., the second direction 982 is "transverse".

Referring to fig. 1, the display substrate 9 further includes a bending portion 99 penetrating through the display substrate 9 along the first direction 981 (i.e., the bending portion 99 penetrates through the display region 91, the lead-in region 92, and the bonding region 93 in the first direction 981), and the bending portion 99 has a flexible structure, so that, referring to fig. 2, by deformation of the bending portion 99, a relative angle of portions of the display substrate 9 (display device) located at two sides of the bending portion 99 is variable, thereby implementing "bending" of the display device, and the setting includes complete "alignment". That is, the display module according to the embodiment of the present invention is used in a foldable display device.

Since the bent portion 99 may be deformed, the driving units are not disposed at the positions thereof, and the driving units 2 are respectively disposed at two sides of the bent portion 99, that is, the driving units 2 are relatively uniformly distributed along the second direction 982, and the output ends 3 are naturally uniformly distributed along the second direction 982.

In the embodiment of the present invention, the driving units 2 are disposed on two sides of the bending portion 99 of the display substrate 9 in the second direction 982, so that the output terminals 3 of the driving units 2 are uniformly distributed along the second direction 982; furthermore, at least some of the lead-in wires 4 are connected to the output 3 of a plurality of different drive units 2, i.e. these lead-in wires 4 can take drive signals from a plurality of positions which differ significantly in the second direction 982; therefore, the driving signals at the positions of the lead-in wires 4 are relatively uniform, and the driving signals can be input to the display area 91 of the display substrate 9 relatively uniformly, so that the relatively uniform driving signals can be obtained at the positions of the display area 91, the display effect at the positions of the display area 91 is uniform, and the display uniformity (uniformity) of the foldable display device can be improved.

In particular, when the size of the display substrate 9 is increased, more driving units 2 are needed, so that the uniformity of the display effect of the large-size foldable display device can be ensured without causing other problems such as excessive heating of current.

Optionally, in the second direction 982, the bending portion 99 is located in the middle of the display substrate 9; the number of the driving units 2 located at both sides of the bent portion 99 in the second direction 982 is equal, and the driving units are symmetrically arranged with respect to the bent portion 99.

As a way of the embodiment of the present invention, the bending portion 99 may be located at the middle position of the display substrate 9, and the driving units 2 at the two sides of the bending portion 99 are arranged symmetrically and have the same number. That is, the display unit is symmetrically distributed with respect to the bending portion 99 (left-right symmetry in fig. 1 and 4) as a whole, which is advantageous for further improving the uniformity of the driving signal and realizing complete "folding" of the display device.

Optionally, the driving unit 2 includes at least one of: a chip on film; a driver chip; the circuit board assembly comprises a circuit board and a driving chip connected with the circuit board.

In the embodiment of the present invention, the driving unit 2 may be a flexible Chip On Film (COF) with a Chip, or a driving Chip (IC) directly bonded On the display substrate 9, or a circuit board (including a flexible circuit board) bonded and connected to the display substrate 9 and a driving Chip disposed On the circuit board.

Of course, the specific form of the driving unit 2 is not limited thereto, as long as it can be bound with the display substrate 9 and has a plurality of output terminals 3 capable of providing driving signals.

Optionally, the bonding region 93 is provided with a plurality of pads 51 sequentially arranged in the second direction 982; the pad 51 is connected with the output terminal 3; at least a part of the pads 51 are connected to the lead-in wires 4 by connection wires 52 extending in the first direction 981 to connect the lead-in wires 4 with the output terminals 3.

As a form of the embodiment of the present invention, the display substrate 9 may be provided with a plurality of pads 51 (Pad) arranged along the second direction 982 in the bonding area 93, and the pads 51 are connected to the corresponding lead-in wires 4 through the connection wires 52 extending along the first direction 981 (e.g., extending upward); while the output 3 of the driving unit 2 may be connected to the pad 51 (for example by means of an anisotropic photoresist).

Thus, the signal at the output 3 of the driving unit 2 can enter the pad 51, the connection line 52, the lead-in 4 in sequence; that is, the lead-in wire 4 is connected to the output terminal 3 through the connection wire 52 and the pad 51.

It should be understood that the output terminal 3 of the driving unit 2 refers to a structure capable of being connected to the Pad 51, such as a connector (Pad) disposed on the surface of the driving unit 2, and the connector may further need to be connected to a signal providing port of the driving chip, such as a Pin (Pin) of the driving chip, through a lead (such as a lead disposed on a chip on film).

Wherein, it should be understood that, based on the limitation of the output capability, maximum current, etc. of a single port, a plurality of pins (Pin) of the driving chip can output the same signal, and the plurality of pins are connected with a plurality of joints, the plurality of joints are connected with a plurality of bonding pads 51, and the plurality of bonding pads 51 are further connected with a connecting line 52 (such as a thicker connecting line 52) to be connected to a position of the lead-in 4; thus, the above plurality of connections should be considered as "one" output 3 on the drive unit 2.

Alternatively, the lead-in wires 4 include positive lead-in wires 41 for supplying a positive drive signal to the display area 91; the positive lead-in wire 41 is located between the display area 91 and the binding area 93 and extends along the second direction 982; the output terminal 3 includes a positive output terminal 31 connected to the positive lead-in wire 41; each drive unit 2 comprises two positive outputs 31.

Referring to fig. 4, in the embodiment of the present invention, the lead-in wires 4 may include a positive lead-in wire 41 for supplying the above positive driving signal (VDD), the positive lead-in wire 41 extending in the second direction 982 (transverse direction) in the lead-in area 92 on the side of the bonding area 93. Each driving unit 2 has two positive output terminals 31 connected (e.g., via connecting wires 52) to the positive lead-in wires 41, so that each driving unit 2 can provide positive driving signals to the positive lead-in wires 41 from two positions, ensure uniform signals at the positions of the positive lead-in wires 41, and uniformly provide the positive driving signals to the display area 91.

Optionally, the lead-in wires 4 further include negative lead-in wires for supplying a negative driving signal to the display area 91; the output end 3 also comprises a negative electrode output end connected with the negative electrode lead-in wire; each drive unit 2 comprises at least two negative output terminals.

Referring to fig. 4, the lead-in 4 further includes a negative lead-in for supplying the above negative driving signal (VSS), which is connected to the negative output terminal of the driving unit 2.

Optionally, the negative lead-in wire includes a first negative lead-in wire 421 located between the display area 91 and the binding area 93 and extending along the second direction 982; any two adjacent driving units 2 in the second direction 982 correspond to one first negative lead-in line 421; the negative output terminal includes a first negative output terminal 321 connected to the first negative lead-in 421; two ends of each first negative lead-in line 421 are respectively connected to one first negative output end 321 of its corresponding two driving units 2; and in the second direction 982, each of the two first negative output terminals 321 connected to one first negative lead-in 421 is closer to the other first negative output terminal 321 than any positive output terminal 31 on the driving unit 2 where it is located.

Referring to fig. 4, the above negative lead-in wires may include a first negative lead-in wire 421, which also extends in a second direction 982 (lateral direction) in the lead-in area 92 at the side of the binding area 93. Wherein each first negative lead-in 421 is connected (e.g. connected by a connecting line 52) between two adjacent driving units 2, or "connected in series" between two adjacent driving units 2; and the two first negative output terminals 321 connected to one first negative lead-in 41 should be located between the two closest positive output terminals 31 of the corresponding two driving units 2. Thus, the first negative lead-in line 421 can supply a negative driving signal to the display region 91 from a position between two adjacent driving units 2, improving display uniformity.

Optionally, the negative lead-in wires include a second negative lead-in wire 422 located between the display area 91 and the binding area 93 and extending along a second direction 982; one second negative lead-in wire 422 corresponds to each driving unit 2; the negative output terminal includes a second negative output terminal 322 connected to a second negative lead-in 422; each drive unit 2 comprises at least one first output 3 located between its two positive outputs 31 in a second direction 982; each second negative lead-in 422 is connected to all the second negative output terminals 322 of its corresponding driving unit 2.

Referring to fig. 4, the above negative lead-in wires may include a second negative lead-in wire 422, which also extends in a second direction 982 (transverse direction) in the lead-in area 92 at the side of the binding area 93. Each second negative lead-in 422 is connected to the second negative output 322 of only one of the driving units 2 (e.g. via the connecting line 52), and the second negative output 322 of each driving unit 2 is located between the two positive outputs 31 thereof. Thus, the second cathode lead-in wire 422 can supply a cathode driving signal to the display area 91 from the position where each driving unit 2 is located, improving display uniformity.

Optionally, except for two driving units 2 located at two ends in the second direction 982, each of the other driving units 2 includes two second negative output terminals 322, and the two second negative output terminals 322 are respectively connected to two ends of one second negative lead-in 422; the two driving units 2 at two ends in the second direction 982 each include a second negative output end 322, and the second negative output end 322 is connected to one end of the second negative lead-in 422 near the bending portion 99.

Further, referring to fig. 4, in addition to the two driving units 2 located at two ends (e.g., left and right ends) in the second direction 982, each of the other driving units 2 has two second negative electrode output ends 322 respectively connected to two ends of the corresponding second negative electrode lead-in wire 422.

For two driving units 2 located at two ends (e.g., left and right ends) in the second direction 982, there is only one second negative output end 322, and the second negative output end 322 is connected to one end of the corresponding second negative lead 422 near the bending portion 99 (i.e., the second negative output end 322 of the driving unit 2 at the left end is connected to the right end of the second negative lead 422, and the second negative output end 322 of the driving unit 2 at the right end is connected to the left end of the second negative lead 422).

It is found through simulation calculation that when the second cathode lead-in wires 422 are connected to the corresponding second cathode output terminals 322 in the above manner, the cathode driving signals provided by the second cathode lead-in wires 422 to the display region 91 can be made most uniform.

In the two driving units 2 located at two ends (e.g., the left and right ends) in the second direction 982, an output end 3 may also be disposed at a position corresponding to the other second negative output end 322 of the other driving unit 2, and the output end 3 may be used to output other driving signals, for example, a GOA driving signal for a gate driving circuit (GOA) to operate, that is, the output end 3 may be a GOA output end 334.

Alternatively, the negative lead-in wire may include a third negative lead-in wire 423; the third negative lead-in wire 423 surrounds the display area 91 at the other side than the binding area 93; the negative output terminal comprises a third negative output terminal 323 connected with a third negative lead-in 423; the two driving units 2 at two ends in the second direction 982 each include a third negative output terminal 323, and the two third negative output terminals 323 are respectively connected to two ends of the third negative lead-in wire 423; in the second direction 982, each third negative output terminal 323 is further away from the bending portion 99 than any positive output terminal 31 of the driving unit 2 where it is located.

Referring to fig. 4, the above negative introduction line may include a third negative introduction line 423, where the third negative introduction line 423 is not distributed in the introduction region 92 outside the bound region 93, and surrounds the display region 91 in the introduction region 92 on the other side (for example, surrounds the display region 91 from the left side, the upper side, and the right side), or the third negative introduction line 423 "semi-surrounds" the display region 91.

Of the two driving units 2 located at two ends (e.g., the left and right ends) in the second direction 982, the two outermost output terminals 3 are the third negative output terminal 323 (i.e., the third negative output terminal 323 is located at a position corresponding to one first negative output terminal 321 of the other driving unit 2). The two third negative output terminals 323 are respectively connected (e.g., connected by a connection line 52) to two ends of a third negative lead-in 423. The third cathode lead-in wire 423 can thus supply the cathode driving signal to the display region 91 from all directions except the side where the bonding region 93 is located, improving display uniformity.

It should be understood that other lead-in wires 4 may be provided on the display substrate 9 to "half-surround" the display area 91 in the above manner to provide other driving signals, for example, there may be lead-in wires 4 connected to both ends of the positive lead-in wire 41 and the subsequent initializing lead-in wire 43, respectively, and to "half-surround" the display area 91 to make the corresponding driving signals more uniform.

Alternatively, any negative lead-in wire provided in the lead-in area 92 between the display area 91 and the bonding area 93 is farther from the display area 91 than the positive lead-in wire 41.

Referring to fig. 4, all of the above negative lead-in wires (the first negative lead-in wire 421, the second negative lead-in wire 422, and the third negative lead-in wire 423) may be farther away from the display region 91 (e.g., lower) than the positive lead-in wire 41 (e.g., closer to the binding region 93), so that the connection wire 52 corresponding to the negative lead-in wire does not extend (extend upward) to the positive lead-in wire 41 in the first direction 981.

Thus, referring to fig. 4, all the negative lead-in wires (the first negative lead-in wire 421, the second negative lead-in wire 422, and the third negative lead-in wire 423) and the negative output wires (the first negative output wire 321, the second negative output wire 322, and the third negative output wire 323) are located "between" the adjacent positive output wires 31; and the connection line 52 corresponding to the negative lead-in wire is not overlapped with the positive lead-in wire 41.

In summary, in the above manner, the negative lead-in wires (and their corresponding connection wires 52) do not have any overlap with the positive lead-in wires 41 (and their corresponding connection wires 52). Therefore, the cathode lead-in wires, the anode lead-in wires 41 and the connecting wires 52 thereof can be arranged in the same layer, and the conduction between the anode drive signals and the cathode drive signals can not be caused, so that the interference can be avoided, and the product structure can be simplified.

Optionally, the lead-in wires 4 further include an initialization lead-in wire 43 for supplying an initialization driving signal to the display area 91; the initialization lead-in 43 is located between the display area 91 and the binding area 93, and extends along a second direction 982; the output 3 further comprises an initialisation output 33 connected to the initialisation lead-in 43; each positive output terminal 31 corresponds to two initialization output terminals 33; in each driving unit 2, in the second direction 982, the two initialization output terminals 33 corresponding to each positive output terminal 31 are respectively located at two sides of the positive output terminal 31, and there is no negative output terminal between the positive output terminal 31 and the corresponding initialization output terminal 33.

In the embodiment of the present invention, the lead-in wires 4 may further include an initializing lead-in wire 43 for supplying the above initializing driving signal (Vinit); each of the more positive output terminals 31 corresponds to two initialization output terminals 33, and the two initialization output terminals 33 "sandwich" the positive output terminal 31 without other negative output terminals therebetween.

Thus, referring to fig. 4, the initializing output 33 (and the corresponding connecting line 52) is equivalent to "separating" the positive output terminal 31 (and the corresponding connecting line 52) from the negative output terminal (and the corresponding connecting line 52), and also "separating" the GOA output terminal 34 (and the corresponding connecting line 52), so as to "isolate" the positive driving signal from the negative driving signal, and avoid the mutual interference between the two driving signals.

Alternatively, the initializing lead-in wires 43 are closer to the display area 91 than the positive lead-in wires 41.

Referring to fig. 4, the above initialization lead-in wires 43 may be closer to the display area 91 (e.g., further up) than the positive lead-in wires 41, that is, further from the bonding area 93, i.e., the initialization lead-in wires 43 are innermost in the display substrate 9, the negative lead-in wires are outermost, and the positive lead-in wires 41 are in the middle.

Of course, the connection line 52 corresponding to the initialization lead-in wire 43 overlaps the positive lead-in wire 41 and the negative lead-in wire, so it should be disposed at a different layer from the positive lead-in wire 41 and separated therefrom by an insulating layer.

Optionally, at least some of the outputs 3 are redundant outputs 39 to which no lead-in 4 is connected.

Referring to fig. 5, some of the outputs 3 (and corresponding connectors) of the drive unit 2 may not actually be connected to the lead-in 4 (and of course also to the connection line 52), i.e. these outputs 3 do not actually output a signal, belonging to the redundant (dummy) output 39.

By providing the redundant output terminal 39, the load of the driving unit 2 (or driving chip) can be balanced, and the interval between the other output terminals 3 (the output terminals 3 that actually output signals) can be increased, so that different driving signals can be better isolated, and the display effect can be further improved.

Of course, in the display module according to the embodiment of the present invention, the driving unit 2 should provide other driving signals, such as the above Data driving signals (Data), and the driving signals can be provided through the corresponding output terminal 3, the connection line 52, the lead-in line 4, and the like, or can be provided in other different manners, which will not be described in detail herein.

In a second aspect, referring to fig. 6, an embodiment of the present invention further provides a display apparatus, which includes any one of the display assemblies described above.

In the embodiment of the present invention, the display unit described above may be combined with other structures (e.g., a pair of case substrates, a power supply unit, a housing, and the like) to form a display device having a complete display function.

The display substrate of the display device of the embodiment of the invention is provided with the bending part, so the display device is a foldable display device, namely, the display device can be bent at the bending part, so that the relative angles of the parts at two sides of the bending part are changed, including bending to be completely folded.

Specifically, the display device according to the embodiment of the invention may be any product or component having a display function, such as an Organic Light Emitting Diode (OLED) display panel, electronic paper, a mobile phone, a tablet computer, a television, a display, a notebook computer, a digital photo frame, a navigator, and the like, and will not be described in detail herein.

It will be understood that the above embodiments are merely exemplary embodiments adopted to illustrate the principles of the present invention, and the present invention is not limited thereto. It will be apparent to those skilled in the art that various modifications and improvements can be made without departing from the spirit and substance of the invention, and these modifications and improvements are also considered to be within the scope of the invention.

Claims (15)

1. A display assembly comprising a display substrate and a plurality of drive units,

the display substrate comprises a display area, a lead-in area surrounding the display area, and a binding area which is positioned on one side of the display area in the first direction and is farther away from the display area than the lead-in area on the side; the lead-in area is provided with a lead-in wire for providing a driving signal for the display area; the drive unit is bound and connected with the binding area;

the display substrate is provided with a flexible bending part penetrating along a first direction; the plurality of driving units are arranged along a second direction crossed with the first direction and are respectively positioned at two sides of the bending part in the second direction;

each driving unit comprises a plurality of output ends arranged along a second direction; each drop wire is connected to at least one output terminal and at least some of the drop wires are connected to a plurality of output terminals of different drive units.

2. The display assembly of claim 1,

the lead-in wires include positive lead-in wires for providing a positive driving signal to the display region; the positive lead-in wire is positioned between the display area and the binding area and extends along the second direction;

the output end comprises a positive output end connected with a positive lead-in wire; each of the driving units includes two positive electrode output terminals.

3. The display assembly of claim 2,

the lead-in wires further comprise negative lead-in wires for providing a negative driving signal to the display area;

the output end also comprises a negative electrode output end connected with the negative electrode lead-in wire; each of the driving units includes at least two negative output terminals.

4. The display assembly of claim 3,

the negative lead-in wires comprise a first negative lead-in wire which is positioned between the display area and the binding area and extends along a second direction; any two adjacent driving units in the second direction correspond to one first negative lead-in wire;

the negative output end comprises a first negative output end connected with a first negative lead-in wire; two ends of each first negative lead-in wire are respectively connected with one first negative output end of the corresponding two driving units; and in the second direction, each of the two first negative output ends connected with one first negative lead-in wire is closer to the other first negative output end than any positive output end on the driving unit where the first negative lead-in wire is located.

5. The display assembly of claim 3,

the cathode lead-in wires comprise second cathode lead-in wires which are positioned between the display area and the binding area and extend along a second direction; each driving unit corresponds to one second negative lead-in wire;

the negative output end comprises a second negative output end connected with a second negative lead-in wire; each of the drive units comprises at least one first output terminal located between two positive output terminals thereof in the second direction; each second cathode lead-in wire is connected with all second cathode output ends of the corresponding driving unit.

6. The display assembly of claim 5,

each of the other driving units comprises two second negative electrode output ends except the two driving units positioned at the two ends in the second direction, and the two second negative electrode output ends are respectively connected with the two ends of one second negative electrode lead-in wire;

the two driving units positioned at the two ends in the second direction respectively comprise a second negative electrode output end, and the second negative electrode output end is connected with one end, close to the bent part, of a second negative electrode lead-in wire.

7. The display assembly of claim 3,

the negative lead-in wires include a third negative lead-in wire; the third negative lead-in wire surrounds the display area at the other sides except the side where the binding area is positioned;

the negative output end comprises a third negative output end connected with a third negative lead-in wire; the two driving units positioned at the two ends in the second direction respectively comprise a third negative electrode output end, and the two third negative electrode output ends are respectively connected with the two ends of a third negative electrode lead-in wire; in the second direction, each third negative output end is farther from the bending part than any positive output end of the driving unit where the third negative output end is located.

8. The display assembly of claim 3,

the lead-in wires further include an initialization lead-in wire for providing an initialization driving signal to the display area; the initialization lead-in wire is positioned between the display area and the binding area and extends along a second direction;

the output end also comprises an initialization output end connected with the initialization lead-in wire; each positive output end corresponds to two initialization output ends; in each driving unit, in the second direction, two initialization output ends corresponding to each positive output end are respectively located on two sides of the positive output end, and no negative output end exists between the positive output end and the corresponding initialization output end.

9. The display assembly of claim 8,

the initialization lead-in wire is closer to the display area than the positive lead-in wire.

10. The display assembly of claim 3,

any negative lead-in wire provided in the lead-in area between the display area and the binding area is farther from the display area than the positive lead-in wire.

11. The display assembly of claim 1,

the binding area is provided with a plurality of bonding pads which are sequentially arranged in a second direction; the bonding pad is connected with the output end; at least a part of the pads are connected to lead-in wires by connection wires extending in a first direction to connect the lead-in wires with output terminals.

12. The display assembly of claim 1,

at least some of the outputs are redundant outputs not connected to a drop line.

13. The display assembly of claim 1, wherein the drive unit comprises at least one of:

a chip on film;

a driving chip;

the circuit board assembly comprises a circuit board and a driving chip connected with the circuit board.

14. The display assembly of claim 1,

in the second direction, the bending part is positioned in the middle of the display substrate;

the number of the driving units positioned at two sides of the bending part in the second direction is equal, and the driving units are symmetrically arranged relative to the bending part.

15. A display device, comprising:

a display assembly according to any one of claims 1 to 14.

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