Display module

Abstract

The present disclosure relates to the technical field of display, and mainly relates to a display module. The display module comprises a display panel, a driving assembly, a flexible circuit board and a functional cover tape. The driving assembly is electrically connected with the display panel. The flexible circuit board has a first fixing unit, a second fixing unit and a connecting unit connecting the first fixing unit and the second fixing unit. The first fixing unit is electrically connected with the driving assembly. The second fixing unit is used for connecting a host computer. The functional cover tape is located on the side of the flexible circuit board away from the display panel. The functional cover tape at least adhesively fixes the first fixing unit on the display panel. The orthographic projection of the functional cover tape on the display panel does not coincide with the orthographic projection of the connecting unit on the display panel. The display module can reduce the probability of tearing the functional cover tape and improve the performance of the display module.

Description

TECHNICAL FIELD

[0001] The present disclosure relates to the technical field of display, in particular to a display module. BACKGROUND

[0002] After the LED (Light Emitting Diode) display module is assembled with the flexible printed circuit (FPC), a functional cover tape (IC Cover Tape) is usually covered to achieve the functions of protection, shielding, grounding, etc.

[0003] The functional cover tape (IC Cover Tape) is very thin and is easily torn after being pulled by external force. The flexible printed circuit (FPC) is only fixed by the adhesive paper in the main area and the back copper leakage area, and the neck root can be bent and moved. During the process operation, pulling the neck can pull the functional cover tape (IC Cover Tape) at the neck root, and in severe cases, it can directly tear the functional cover tape (IC Cover Tape), resulting in abnormal protection and appearance of the functional cover tape (IC Cover Tape).

[0004] It should be noted that the information disclosed in the above background section is only used to strengthen the understanding of the background of the present disclosure, and therefore can include information that does not constitute prior art known to those of ordinary skill in the art. SUMMARY

[0005] The purpose of the present disclosure is to provide a display module that can reduce the probability of tearing the functional cover tape and improve the performance of the display module.

[0006] According to one aspect of the present disclosure, a display module is provided, comprising:

[0007] a display panel;

[0008] a driving assembly electrically connected to the display panel;

[0009] a flexible printed circuit having a first fixing unit, a second fixing unit, and a connecting unit connecting the first fixing unit and the second fixing unit; the first fixing unit is electrically connected to the driving assembly, and the second fixing unit is used to connect a host computer;

[0010] a functional cover tape located on the side of the flexible printed circuit away from the display panel; the functional cover tape at least adhesively fixes the first fixing unit on the display panel; the orthographic projection of the functional cover tape on the display panel does not coincide with the orthographic projection of the connecting unit on the display panel.

[0011] In one embodiment of the present disclosure, the functional cover tape has a coincident area and a non-coincident area.

[0012] In one embodiment of the present disclosure, the functional cover tape has a coincident area and a non-coincident area.

[0013] In the non-coincident area, the functional cover tape has an avoidance notch, so that the functional cover tape has a non-coincident area on the display panel with the connection unit.

[0014] In one embodiment of the present disclosure, the avoidance notch has a gap between at least one side wall and the corresponding side wall of the connection unit.

[0015] In one embodiment of the present disclosure, the avoidance notch has a gap between both side walls and the corresponding side walls of the connection unit.

[0016] In one embodiment of the present disclosure, the gap has a width of 1.5-2mm.

[0017] In one embodiment of the present disclosure, the first fixed unit has a crack stop notch at the side edge thereof connected to the connection unit; one side of the crack stop notch is flush with the edge of the connection unit; and the functional cover tape exposes the crack stop notch.

[0018] In one embodiment of the present disclosure, the crack stop notch has a width of 1.5-2mm.

[0019] In one embodiment of the present disclosure, the crack stop notch has a width of 1.5-2mm.

[0020] In one embodiment of the present disclosure, the functional cover tape has a coincident area and a non-coincident area; in the non-coincident area, the functional cover tape has an avoidance notch; the avoidance notch is in communication with the crack stop notch, and both side walls of the avoidance notch have a gap between the corresponding side walls of the connection unit; and the width of the crack stop notch is equal to the width of the gap.

[0021] It should be understood that the above general description and the following detailed description are only exemplary and explanatory, and cannot limit the present disclosure. BRIEF DESCRIPTION OF DRAWINGS

[0022] The above and other features and advantages of the present disclosure will become more apparent by describing in detail exemplary embodiments thereof with reference to the attached drawings. As apparent from the following description, the drawings are only schematic and are non-limiting. Various

[0023] Figure 1 FIG. 1 is a schematic view of a structure of a display panel according to an embodiment of the present disclosure.

[0024] Figure 2 FIG. 2 is a schematic view of a structure of a display panel according to another embodiment of the present disclosure.

[0025] Figure 3 FIG. 3 is a schematic view of a structure of a display panel according to another embodiment of the present disclosure.

[0026] Figure 4 FIG. 4 is a schematic view of a structure of a display panel according to another embodiment of the present disclosure.

[0027] Figure 5 FIG. 5 is a schematic view of a structure of a functional cover tape according to an embodiment of the present disclosure.

[0028] Figure 6 FIG. 6 is a schematic view of a structure of a flexible circuit board according to an embodiment of the present disclosure.

[0029] Figure 7 FIG. 7 is a schematic view of a structure of a display module according to an embodiment of the present disclosure.

[0030] Figure 8 FIG. 8 is a schematic view of a structure of a functional cover tape according to another embodiment of the present disclosure.

[0031] Figure 9 FIG. 9 is a schematic view of a structure of a flexible circuit board according to another embodiment of the present disclosure.

[0032] Figure 10 FIG. 10 is a schematic view of a structure of a display module according to another embodiment of the present disclosure.

[0033] In the drawings: PNL, display panel; FPC, flexible circuit board; F1, first fixing unit; F2, connecting unit; TAP, functional cover tape; CR, avoiding gap; CZ, crack stopping gap. DETAILED DESCRIPTION

[0034] Example implementations will now be described more fully with reference to the accompanying drawings. Example implementations can be implemented in any of various forms, and are not limited to the specific implementations described herein; rather, specific implementations are provided as example to convey the substance of the present disclosure. The described features, structures, or characteristics can be combined in one or more implementations. In the following description, numerous specific details are provided to give a thorough understanding of implementations of the present disclosure. One skilled in the relevant art will recognize, however, that the

[0035] Moreover, the drawings are not necessarily to scale. Like reference numerals in different drawings represent similar or identical elements unless otherwise specified. The terminology used herein is for the purpose of describing particular implementations only and is not intended to be limiting of the present disclosure. The use of the terms "a" and "the" is intended to include one or more of the elements / constituents / elements described, unless otherwise specified. The use of the terms "including," "comprising," or "having" and variations thereof are meant to encompass the items listed thereafter and mean that other items are possible as well.

[0036] Although relative terms such as "upper," "lower," may be used herein to describe one component's relationship to another component of an icon, such terminology is used herein for convenience only and is merely intended to convey the relative spatial relationship between such components as shown in the examples of the figures. It is understood that if an icon's device were flipped over such that its upper portion became its lower portion, the described "upper" component would then become the described "lower" component. When a structure is "on" another structure, it can mean that the structure is formed integrally with the other structure, or that the structure is "directly" on the other structure, or that the structure is "indirectly" on the other structure via another structure.

[0037] The use of the terms "a," "an," "the," and "at least one" are used interchangeably herein and mean one or more than one of the elements / constituents / elements being described. The use of the terms "including," "comprising," and "having" are meant to encompass the items listed thereafter and mean that other items are possible as well. The use of the terms "first," "second," and the like are merely used to identify one of the elements / constituents / elements being described.

[0038] In the embodiment of the present disclosure, a thin film transistor (TFT) includes an active layer, a gate insulating layer, and a gate which are stacked. The active layer is located in a semiconductor layer, and includes a channel region and a source and a drain which are respectively located on both sides of the channel region. The channel region maintains a semiconductor property, and the source and the drain are both conductive. In the embodiment of the present disclosure, in the case of using transistors with opposite polarities or in the case of changing the current direction in the circuit operation, the functions of the "source" and the "drain" are sometimes exchanged, that is, the "drain" and the "source" can be exchanged. In the embodiment of the present disclosure, for any one transistor, one of the "source" and the "drain" is referred to as a first electrode of the transistor, and the other is referred to as a second electrode of the transistor.

[0039] In the present application, unless specifically defined and limited otherwise, the term "connection" should be interpreted broadly, for example, "connection" can be fixed connection, or detachable connection, or integral; can be directly connected, or indirectly connected through an intermediate medium.

[0040] The embodiment of the present disclosure provides a display module. The display module can be a television, a computer screen, a smart phone, a smart watch screen, or other types of display modules.

[0041] In an example, the display module includes a display panel PNL. Referring to Figure 1 The display panel PNL includes a display area AA and a peripheral area BB located at least one side of the display area AA. In the display area AA, the display panel PNL is provided with display units UU arranged in an array, the display units UU including sub-pixels PIX and pixel driving circuits PDC driving the sub-pixels PIX. The display panel PNL does not provide display units UU in the peripheral area BB, or the provided display units UU are not used for displaying pictures.

[0042] Referring to Figure 1The display panel PNL is provided with a plurality of scan wires GL extending along the row direction DH in the display area AA, and each scan wire GL is arranged in one-to-one correspondence with each display unit row. The pixel driving circuit PDC of each display unit UU in the display unit row is electrically connected with the corresponding scan wire GL, and the scan wire GL is used to load a scan signal to the pixel driving circuit PDC. The display panel PNL is also provided with a plurality of data wires DL extending along the column direction DV in the display area AA, and each data wire DL is arranged in one-to-one correspondence with each display unit column. The pixel driving circuit PDC of each display unit UU in the display unit column is electrically connected with the corresponding data wire DL, and the data wire DL is used to load a data voltage to the pixel driving circuit PDC. In this way, the pixel driving circuit PDC of each display unit UU is connected with one scan wire GL and one data wire DL. When a scan signal is loaded on the scan wire GL, the data voltage loaded on the data wire DL can be written into the pixel driving circuit PDC, so that the pixel driving circuit PDC can control the brightness of the sub-pixel PIX according to the written data voltage.

[0043] In an embodiment of the present disclosure, the display panel PNL is also provided with a plurality of sensing wires extending along the column direction DV, and the pixel driving circuit PDC of each display unit UU in the display unit row is electrically connected with the corresponding sensing wire, and the sensing wire is used to transmit a sensing signal to the pixel driving circuit PDC. Optionally, in some working states, the sensing wire can also load a reference voltage to the pixel driving circuit PDC.

[0044] In an embodiment of the present disclosure, the display panel PNL is also provided with a driving voltage wire extending along the row direction DH. The pixel driving circuit PDC of each display unit UU in the display unit row is electrically connected with the corresponding driving voltage wire, and the driving voltage wire is used to load a driving voltage to the pixel driving circuit PDC. In this way, the pixel driving circuit PDC of each display unit UU is connected with one driving voltage wire.

[0045] Optionally, the pixel driving circuit PDC at least includes a data writing transistor, a driving transistor and a storage capacitor, and the gate of the driving transistor can be electrically connected with one electrode plate of the storage capacitor. The first pole of the data writing transistor can be electrically connected with the data wire DL, and the gate of the data writing transistor can be electrically connected with the scan wire GL. The pixel driving circuit PDC is configured such that when a scan signal is loaded on the scan wire GL, the data writing transistor is turned on, so that the data voltage on the data wire DL is written into the gate of the driving transistor and the storage capacitor. After the data writing transistor is turned off, the data voltage can be maintained by the storage capacitor. The driving transistor can output a driving current to drive the sub-pixel PIX to emit light under the control of the voltage on its gate.

[0046] It can be understood that the pixel driving circuit PDC of the embodiment of the present disclosure can further include other transistors or capacitors to make the pixel driving circuit PDC have better driving performance. For example, the pixel driving circuit PDC can be a 3T1C (3 thin film transistors and one storage capacitor), 7T1C (7 thin film transistors and one storage capacitor), 8T1C (8 thin film transistors and one storage capacitor), or other architecture of pixel driving circuit.

[0047] Referring to Figure 2 With Figure 3 The display panel PNL includes a driving backplane and a pixel layer PIXL. The driving backplane includes a substrate SBT and a driving layer DRL which are stacked, and the pixel layer PIXL is arranged on a side of the driving layer DRL away from the substrate SBT.

[0048] Optionally, the substrate SBT can be a substrate SBT of inorganic material, a substrate SBT of organic material, or a substrate SBT of organic material and inorganic material stacked alternately. For example, in an embodiment of the present disclosure, the material of the substrate SBT can be a glass material such as soda-lime glass, quartz glass, sapphire glass, etc. In another embodiment of the present disclosure, the material of the substrate SBT can be Polymethyl methacrylate (PMMA), Polyvinyl alcohol (PVA), Polyvinyl phenol (PVP), Polyether sulfone (PES), polyimide, polyamide, polyacetal, Poly carbonate (PC), Polyethylene terephthalate (PET), Polyethylene naphthalate (PEN), or a combination thereof. In another embodiment of the present disclosure, the substrate SBT can also be a flexible substrate SBT, for example, the material of the substrate SBT can be Polyimide (PI). The substrate SBT can also be a composite of multiple layers, for example, in an embodiment of the present disclosure, the substrate SBT can include a Bottom Film, a pressure-sensitive adhesive layer, a first polyimide layer, and a second polyimide layer which are stacked in sequence.

[0049] Referring to Figure 3The pixel driving circuit PDC is arranged in the driving layer DRL, and the pixel layer PI XL can be provided with the light emitting element LD electrically connected with the pixel driving circuit PDC, and the light emitting element LD can be used as a sub-pixel PIX of the display panel PNL. In this way, the driving layer DRL is provided with the pixel driving circuit PDC arranged in an array, the pixel layer PI XL is provided with the light emitting element LD arranged in an array, and each light emitting element LD emits light under the control of the corresponding pixel driving circuit PDC. The pixel driving circuit PDC is used to drive the corresponding sub-pixel PIX (light emitting element LD) to make the display panel PNL display a picture.

[0050] In an embodiment of the present disclosure, referring to Figure 4 The driving layer DRL can include a semiconductor layer SCL, a gate insulating layer GI, a gate layer GT, an interlayer dielectric layer ILD, a source-drain metal layer SD, a planarization layer PLN, and the like, which are laminated between the substrate SBT and the pixel layer PI XL. Each thin film transistor and storage capacitor can be formed by the semiconductor layer SCL, the gate insulating layer GI, the gate layer GT, the interlayer dielectric layer ILD, the source-drain metal layer SD, and the like. The positional relationship of each film layer can be determined according to the film layer structure of the thin film transistor. Further, the semiconductor layer SCL can be used to form the channel region of the transistor, and the first and second poles on both sides of the channel region, and can also be used to form part of the wiring or conductive structure by being conductive when necessary. The gate layer GT can be used to form one or more of the gate layer wiring such as the scan wiring, the reset control wiring, the light emitting control wiring, and the like, and can also be used to form the gate of the transistor, and can also be used to form part or all of the electrode plate of the storage capacitor. The source-drain metal layer SD can be used to form the data wiring, the driving power voltage wiring, and the like, and can also be used to form part of the electrode plate of the storage capacitor. Of course, in other embodiments of the present disclosure, the driving layer DRL can also include other film layers as needed, for example, it can also include a light shielding layer, an inorganic buffer layer BUF, and the like, between the semiconductor layer SCL and the substrate SBT. Any one of the above-mentioned semiconductor layer SCL, gate layer GT, source-drain metal layer SD, and the like can also be multi-layered as needed, for example, the driving layer DRL can include two different semiconductor layers SCL, or two or three source-drain metal layers SD, or two or three gate layers GT; accordingly, the insulating film layer in the driving layer DRL (such as the gate insulating layer GI, the interlayer dielectric layer ILD, the planarization layer PLN, and the like) can be adaptively increased or reduced, or a new insulating film layer can be added as needed.

[0051] As an example, referring to Figure 4The driving layer DRL can include, in sequence, an inorganic buffer layer BUF, a semiconductor layer SCL, a gate insulating layer GI, a gate layer GT, an interlayer dielectric layer ILD, a source-drain metal layer SD, and a planarization layer PLN, which are stacked on the surface of the substrate SBT. The thin film transistor thus formed is a top-gate thin film transistor. In other examples, the driving layer can include, in sequence, an inorganic buffer layer, a gate layer, a gate insulating layer, a semiconductor layer, a source-drain metal layer, and a planarization layer, which are stacked on the surface of the substrate. The thin film transistor thus formed is a bottom-gate thin film transistor. In other examples, the driving layer can also have a dual-gate thin film transistor, and the like.

[0052] It can be understood that the above examples of the driving backplane are only one possible way of the driving backplane of the embodiments of the present disclosure. In other embodiments of the present disclosure, the driving backplane can also have other structures.

[0053] Referring to Figure 4 The light emitting element LD in the pixel layer PIXL can include two electrodes and a light emitting functional unit interposed between the two electrodes. For example, the pixel layer PIXL can include, in sequence, a pixel electrode layer PEL, a light emitting functional layer EFL, and a common electrode layer COML. The pixel electrode layer PEL has a plurality of pixel electrodes in the display area AA of the display panel PNL. The light emitting functional layer EFL has a part connected to the pixel electrode as the light emitting functional unit of the light emitting element LD. The common electrode layer COML is electrically connected to the light emitting functional unit of each light emitting element LD as a common electrode.

[0054] Further, the pixel layer PIXL can further include a pixel definition layer PDL located between the pixel electrode layer PEL and the light-emitting functional layer EFL. The pixel definition layer PDL has a plurality of through pixel openings arranged one-to-one corresponding to the plurality of pixel electrodes, and any one pixel opening exposes at least a partial region of the corresponding pixel electrode. For example, the pixel definition layer PDL covers the edges of the pixel electrode and exposes at least a partial inner region of the pixel electrode, so that the pixel definition layer PDL can effectively define the actual effective region (the region directly connected to the light-emitting functional unit) of the pixel electrode, and further define the light-emitting region and the light-emitting area of the light-emitting element LD. The light-emitting functional layer EFL at least covers the pixel electrode exposed by the pixel definition layer PDL. The common electrode layer COML can cover the light-emitting functional layer EFL in the display area AA. The pixel electrode and the common electrode layer COML provide carriers such as electrons and holes to the light-emitting functional layer EFL, so that the light-emitting functional layer EFL emits light. The part of the light-emitting functional layer EFL between the pixel electrode and the common electrode layer COML can serve as a light-emitting functional unit. The pixel electrode, the common electrode layer COML, and the light-emitting functional unit form the light-emitting element LD. Among them, one of the pixel electrode and the common electrode layer COML serves as an anode AE of the light-emitting element LD, and the other serves as a cathode CE of the light-emitting element LD.

[0055] In an example, the pixel electrode serves as the anode AE of the light-emitting element LD, and the common electrode layer COML serves as the cathode CE of the light-emitting element LD.

[0056] In an embodiment of the present disclosure, the light-emitting element LD can be an organic electroluminescent diode (OLED), a micro light-emitting diode (Micro LED), a quantum dot-organic electroluminescent diode (QD-OLED), a quantum dot light-emitting diode (QLED), or other types of light-emitting elements. It can be understood that the type of light-emitting element is different, and the material and film layer of the light-emitting functional unit are different.

[0057] In an embodiment of the present disclosure, referring to Figure 2 With Figure 3 The display panel PNL further includes a thin film encapsulation layer TFE, which can be arranged on the surface of the pixel layer PIXL away from the substrate SBT, and can include inorganic encapsulation layers and organic encapsulation layers arranged alternately. The inorganic encapsulation layer can effectively block external moisture and oxygen, so as to avoid water and oxygen from invading the pixel layer PIXL and causing the material in the pixel layer PIXL to age. Optionally, the edge of the inorganic encapsulation layer can be located in the peripheral area BB. The organic encapsulation layer is located between two adjacent inorganic encapsulation layers, so as to achieve planarization and weaken the stress between the inorganic encapsulation layers. Among them, the edge of the organic encapsulation layer can be located between the edge of the display area AA and the edge of the inorganic encapsulation layer. For example, referring to Figure 4The thin film encapsulation layer TFE includes a first inorganic encapsulation layer CVD1, an organic encapsulation layer IJP, and a second inorganic encapsulation layer CVD2, which are sequentially stacked on the side of the pixel layer PIXL (the common electrode layer COML) away from the substrate base plate SBT. Of course, in other embodiments of the present disclosure, the display panel PNL can also not be provided with the thin film encapsulation layer TFE, but other ways can be used to encapsulate and protect the pixel layer.

[0058] In an embodiment of the present disclosure, referring to Figure 1 With Figure 2 The display panel PNL can further include a touch buffer layer TSL, which can be arranged on the surface of the thin film encapsulation layer TFE away from the substrate base plate SBT, so that the display panel PNL has a touch function. Exemplarily, the touch buffer layer TSL includes a touch buffer layer TBUF, a first touch metal layer TMA, a touch dielectric layer TLD, and a second touch metal layer TMB, which are sequentially stacked on the side of the thin film encapsulation layer TFE away from the substrate base plate SBT. The first touch metal layer TMA and the second touch metal layer TMB at least partially overlap each other to form a touch capacitor.

[0059] In an embodiment of the present disclosure, the display module further includes a driving assembly and a flexible circuit board FPC. The driving assembly is arranged in the peripheral area BB of the display panel PNL. In an example, the display panel PNL is a flexible display panel PNL (the substrate base plate SBT is a flexible substrate). The peripheral area BB of the display panel PNL has a fan-out area, a bending area, and a binding area arranged in sequence away from the display area AA. The display panel PNL can be bent through the bending area, so that the binding area is located on the backlight side of the display panel PNL. The driving assembly is bound to the binding area (the driving assembly can include a driving chip). The flexible circuit board FPC is also located on the backlight side of the display panel PNL. One end of the flexible circuit board FPC is bound to the binding area, and the other end is used to connect a host computer. In this way, the boundary width of the flexible display module can be reduced, and the screen ratio can be improved. In an example, the display panel is bound to the driving assembly and the flexible circuit board through a chip on film.

[0060] In this example, the display signal sent by the host computer can be loaded to the driving assembly through the flexible circuit board FPC. The driving assembly can drive the sub-pixels PIX on the display panel PNL to display a picture based on the display signal. At the same time, the driving assembly can load a touch input signal to the host computer through the flexible circuit board FPC. The host computer generates a touch driving signal based on the touch input signal, and loads the touch driving signal to the driving assembly again through the flexible circuit board FPC. The driving assembly drives the corresponding sub-pixels PIX on the display panel PNL to display a picture based on the touch driving signal.

[0061] In an embodiment of the present disclosure, referring to Figure 6 ,Figure 7 、 Figure 9 With Figure 10 The flexible circuit board FPC has a first fixing unit F1, a second fixing unit (not shown in the figure), and a connecting unit F2 connecting the first fixing unit F1 and the second fixing unit. Among them, the first fixing unit F1 is used for electrical connection with the driving assembly (for example, the first fixing unit F1 is bound in the binding area of the flexible display module), and the second fixing unit is used for connecting the host computer. The first fixing unit F1 is fixed on the backlight side of the display panel PNL by adhesive paper, for realizing the fixed connection of the flexible circuit board FPC and the display panel PNL, and the connecting unit F2 can be bent.

[0062] In an embodiment of the present disclosure, the display module further comprises a functional cover tape TAP, which can be located on the side of the first fixing unit F1 away from the display panel PNL, and is bonded to the first fixing unit F1 and the display panel PNL. In addition, the functional cover tape TAP completely covers the first fixing unit F1 (it can be understood that the orthographic projection of the functional cover tape TAP on the display panel PNL is greater than the orthographic projection of the first fixing unit F1 on the display panel PNL). In this way, the first fixing unit F1 can be protected.

[0063] In the present disclosure, the functional cover tape TAP has the functions of protecting and fixing the chip, and can improve the efficiency and automation degree of the packaging process. Among them, the functional cover tape TAP is usually made of polyamide (Polyamide) or polyester (Polyester) material. These materials have good high-temperature resistance and can maintain stable and reliable packaging tape functions during the packaging process. Of course, in other examples, the functional cover tape TAP can also be made of other materials not shown.

[0064] In the related art, the functional cover tape (IC Cover Tape) is very thin and is easily torn after being pulled by external force. The flexible circuit board (Flexible Printed Circuit, FPC for short) only has adhesive paper fixed on the first fixing unit and the second fixing unit (back copper leakage area), and the connecting unit is bendable and movable. During the process operation, pulling the connecting unit will pull the functional cover tape (IC Cover Tape) at the connecting end of the connecting unit and the first fixing unit, and in severe cases, it can directly tear the functional cover tape (IC Cover Tape), causing abnormal protection, appearance, etc. of the functional cover tape (IC Cover Tape).

[0065] To solve the above problems, the present disclosure proposes to optimize the structure of the functional cover tape TAP, reduce the influence of the connecting unit F2 on the functional cover tape TAP, so as to reduce the risk of tearing the functional cover tape TAP, ensure the protection function of the functional cover tape TAP, and improve the stability of the display module.

[0066] In an embodiment of the present disclosure, referring to Figure 7 and Figure 10 , the normal projection of the functional cover tape TAP on the display panel PNL does not coincide with the normal projection of the connecting unit F2 on the display panel PNL. In this way, based on the flexible circuit board FPC, the functional cover tape TAP only covers the first fixed unit F1 (fixed opposite to the display panel PNL), and when the connecting unit F2 is active, it will first be limited by the back glue fixation of the first fixed unit F1 to restrict the movement space of the connecting unit F2, thereby avoiding damaging the functional cover tape TAP; the influence of the connecting unit F2 on the functional cover tape TAP can be reduced, even if the connecting unit F2 is active, it is not easy to pull the functional cover tape TAP, thereby causing the functional cover tape TAP to tear, and also causing the functional cover tape TAP to wrinkle.

[0067] In an embodiment of the present disclosure, the functional cover tape TAP has a coincident area and a non-coincident area, wherein the coincident area refers to the area where the functional cover tape TAP overlaps with the first fixed unit F1. The non-coincident area refers to the area where the functional cover tape TAP does not overlap with the first fixed unit F1. In order to ensure the stable connection between the first fixed unit F1 and the display panel PNL, the non-coincident area can be appropriately increased in area to increase the bonding area of the functional cover tape TAP and the display panel PNL.

[0068] In an embodiment of the present disclosure, referring to Figure 7 and Figure 10 , along the arrangement direction perpendicular to the first fixed unit F1 and the connecting unit F2, the normal projection of the functional cover tape TAP partially coincides with the normal projection of the connecting unit F2. It can be understood that along the arrangement direction perpendicular to the first fixed unit F1 and the connecting unit F2, the size of the functional cover tape TAP is greater than the size of the first fixed unit F1, and the functional cover tape TAP has a non-coincident area at least at one end where the first fixed unit F1 and the connecting unit F2 are connected. In this way, through the connection and fixation of the functional cover tape TAP to the one end where the first fixed unit F1 and the connecting unit F2 are connected, the connecting unit F2 is not easy to pull the first fixed unit F1 when it is active, ensuring the stability of the electrical connection of the first fixed unit F1.

[0069] In an embodiment of the present disclosure, referring to Figure 5 , Figure 7 , Figure 8 and Figure 10In the non-overlapping area, the functional cover tape TAP has an avoidance gap CR which avoids the connection unit F2, so that the normal projection of the functional cover tape TAP on the display panel PNL does not overlap with the normal projection of the connection unit F2 on the display panel PNL. In the present disclosure, the structure of the functional cover tape TAP is optimized on the basis of the existing functional cover tape TAP, and the avoidance gap CR is arranged to expose the connection unit F2 (expose the connection end of the connection unit F2 and the first fixed unit F1), so that the connection unit F2 is not easy to cause the functional cover tape TAP to be torn when it moves. In addition, the protection in the present disclosure only optimizes the structure of the functional cover tape TAP, which does not increase the cost and can be prepared by a conventional process without special requirements.

[0070] In an embodiment of the present disclosure, referring to Figure 5 - Figure 7 , the avoidance gap CR extends to the edge of the first fixed unit F1 along the extension direction of the connection unit F2 (i.e. the connection between the first fixed unit F1 and the connection unit F2), so that the functional cover tape TAP can be completely bonded to the first fixed unit F1 to protect the first fixed unit F1 and will not be torn due to the movement of the connection unit F2.

[0071] In an example of the present disclosure, the side wall of the avoidance gap CR is flush with the side wall of the connection unit F2 (not shown in the figure). It can be understood that the width of the avoidance gap CR can be exactly equal to the width of the connection unit F2. In other words, the two side walls of the avoidance gap CR are flush with the two side walls of the connection unit F2 respectively. The width in the present disclosure refers to the size perpendicular to the extension direction of the connection unit F2. The flush in the present disclosure refers to the substantially flush, which allows for manufacturing errors.

[0072] In another example, referring to Figure 7 , there is a gap between at least one side wall of the avoidance gap CR and the side wall of the connection unit F2. It can be understood that the width of the avoidance gap CR is greater than the width of the connection unit F2, and there is a gap between at least one side wall of the avoidance gap CR and the corresponding side wall of the connection unit F2. In this way, a gap can be left between the connection unit F2 and the functional cover tape TAP, further reducing the interference of the connection unit F2 on the functional cover tape TAP, and further reducing the risk of the functional cover tape TAP being torn.

[0073] In this example, referring to Figure 7 , there is a gap between the two side walls of the avoidance gap CR and the two side walls of the connection unit F2 respectively, so that the connection unit F2 will not interfere with the functional cover tape TAP within a certain range of movement, further reducing the risk of the functional cover tape TAP being torn.

[0074] In an embodiment of the present disclosure, the gap has a width of 1.5-2 mm. If the gap is too small, it is also possible to interfere with the connecting unit F2 in motion, and if the gap is too large, it will affect the fixing between the first fixing unit F1 and the display panel PNL. In the gap width range provided in the present disclosure, neither the connecting unit F2 and the first fixing unit F1 interfere, nor the fixing between the first fixing unit F1 and the display panel PNL is affected.

[0075] In order to further reduce the interference of the connecting unit F2 on the functional cover tape TAP, and further reduce the risk of tearing the functional cover tape TAP, in an embodiment of the present disclosure, the structure of the first fixing unit F1 is optimized. In an example, referring to Figure 9 With Figure 10 , the first fixing unit F1 is provided with a tear-stop notch CZ at the side edge thereof connected with the connecting unit F2, and the tear-stop notch CZ is adjacent to the connecting unit F2. It can be understood that the tear-stop notch CZ is flush with the edge of the connecting unit F2 on one side, and there is a gap between the tear-stop notch CZ and the edge of the connecting unit F2 on the other side.

[0076] In this example, the functional cover tape TAP exposes the tear-stop notch CZ. In an example, referring to Figure 8 , the avoidance notch CR extends to the tear-stop notch CZ to expose the tear-stop notch CZ. It can be understood that the functional cover tape TAP is not provided at the tear-stop notch CZ, and the avoidance notch CR exposes the tear-stop notch CZ. In other words, in this example, the edge of the first fixing unit F1 at the tear-stop notch CZ is the groove wall of the tear-stop notch CZ, and the avoidance notch CR extends to the edge of the first fixing unit F1, that is, the avoidance notch CR exposes the tear-stop notch CZ.

[0077] In the present disclosure, the first fixing unit F1 is provided with a tear-stop notch CZ on both sides connected with the connecting unit F2, and the functional cover tape TAP is exposed to the tear-stop notch CZ, so that the functional cover tape TAP can be in contact with the connecting unit F2 to the greatest extent, so that the connecting unit F2 in motion has minimal interference with the functional cover tape TAP, further reducing the risk of tearing the functional cover tape TAP.

[0078] In an example, the first fixing unit F1 is provided with a tear-stop notch CZ (the number of tear-stop notches CZ is one) at one side edge thereof connected with the connecting unit F2. In another example, referring to Figure 9 With Figure 10, the first fixed unit F1 is provided with two crack arrest notches CZ (the number of crack arrest notches CZ is two) on both sides of the connection unit F2, and the two crack arrest notches CZ can make the connection unit F2 as active as possible on both sides without interfering with the functional cover tape TAP, and has better prevention of the functional cover tape TAP being torn.

[0079] In an embodiment of the present disclosure, the width of the crack arrest notch CZ is 1.5-2mm. In an example, the width of the crack arrest notch CZ is equal to the width of the gap. In this way, it is convenient to prepare.

[0080] In the present disclosure, firstly, the avoidance notch CR provided on the functional cover tape TAP makes the functional cover tape TAP not overlap with the connection unit F2, which can reduce the interference of the connection unit F2 when active on the functional cover tape TAP, and can reduce the risk of the functional cover tape TAP being torn; secondly, the crack arrest notch CZ is provided on the first fixed unit F1, and the functional cover tape TAP exposes the crack arrest notch CZ, which further reduces the interference of the connection unit F2 and the first fixed unit F1 when the connection end is active on the functional cover tape TAP, and can further reduce the risk of the functional cover tape TAP being torn.

[0081] The functional cover tape TAP in the present disclosure takes into account the protection function, movable effect, and anti-tearing effect, and no additional investment is required, that is, the first fixed unit F1 is integrated with several advantages such as being covered by the functional cover tape TAP, the connection unit F2 being movable, and the functional cover tape TAP not being torn, and is suitable for wide promotion.

[0082] Other embodiments of the present disclosure will be readily apparent to those skilled in the art upon considering the specification and practice. The present application is intended to cover any variations, uses, or adaptive changes of the present disclosure that follow the general principles of the present disclosure and include common knowledge or conventional technical means in the art. The specification and examples are only considered as exemplary, and the true scope and spirit of the present disclosure are indicated by the appended claims.

Claims

1. A display module, characterized by The display module comprises: a display panel; a driving assembly electrically connected to the display panel; a flexible circuit board having a first fixing unit, a second fixing unit and a connecting unit connecting the first fixing unit and the second fixing unit; the first fixing unit is electrically connected to the driving assembly, and the second fixing unit is used for connecting a host computer; a functional cover tape located on a side of the flexible circuit board away from the display panel; the functional cover tape at least adhesively fixes the first fixing unit on the display panel; a normal projection of the functional cover tape on the display panel does not coincide with a normal projection of the connecting unit on the display panel; a crack stopping notch is arranged on a side edge of the first fixing unit at a position where the first fixing unit is connected to the connecting unit; one side of the crack stopping notch is flush with an edge of the connecting unit; and the functional cover tape exposes the crack stopping notch; the functional cover tape has a coinciding area and a non-coinciding area; in the non-coinciding area, the functional cover tape has an avoiding notch; the avoiding notch is in communication with the crack stopping notch, and at least one side wall of the avoiding notch has a gap with a corresponding side wall of the connecting unit; a width of the crack stopping notch is equal to a width of the gap.

2. The display module of claim 1, wherein, Along a direction perpendicular to the arrangement direction of the first fixing unit and the connecting unit, a normal projection of the functional cover tape partially coincides with a normal projection of the connecting unit.

3. The display module according to claim 2, wherein in the non-coinciding area, the functional cover tape has an avoiding notch, so that a normal projection of the functional cover tape on the display panel does not coincide with a normal projection of the connecting unit on the display panel.

4. The display module of claim 3, wherein, both side walls of the avoiding notch have a gap with corresponding two side walls of the connecting unit.

5. The display module of claim 1, wherein, the width of the gap is 1.5-2 mm.

6. The display module of claim 1, wherein, the number of the crack stopping notches is two, and the two crack stopping notches are respectively located on two sides of the connecting unit.

7. The display module of claim 1, wherein, the width of the crack stopping notch is 1.5-2 mm.

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