阅读说明：本技术 显示面板、显示装置及终端设备 (Display panel, display device and terminal equipment ) 是由 张爽 黄小霞 纪冰 于 2020-06-19 设计创作，主要内容包括：本公开关于一种显示面板、显示装置及终端设备,涉及显示技术领域。显示面板包括显示基板和主柔性电路板,显示基板具有背光面；主柔性电路板包括设于背光面的连接段、固定段和测试段,连接段的外周面包括相背的第一侧面和第二侧面；固定段固定于背光面,且一端与第一侧面连接,另一端沿背离第一侧面的方向延伸；测试段一端与第一侧面连接,另一端具有连接端口；测试段靠近固定段的侧面与第一侧面通过止裂槽过渡连接,在第一侧面在所述背光面的正投影的延伸方向上,止裂槽的深度不大于测试段的宽度的10％；在第一形态下,连接端口位于显示基板的边缘以内；在第二形态下,测试段向第二侧面背离第一侧面的一侧弯折,且连接端口伸出显示基板的边缘外。(The disclosure relates to a display panel, a display device and a terminal device, and relates to the technical field of display. The display panel comprises a display substrate and a main flexible circuit board, wherein the display substrate is provided with a backlight surface; the main flexible circuit board comprises a connecting section, a fixing section and a testing section, wherein the connecting section, the fixing section and the testing section are arranged on the backlight surface, and the outer peripheral surface of the connecting section comprises a first side surface and a second side surface which are opposite; the fixing section is fixed on the backlight surface, one end of the fixing section is connected with the first side surface, and the other end of the fixing section extends along the direction departing from the first side surface; one end of the test section is connected with the first side face, and the other end of the test section is provided with a connecting port; the side surface of the testing section, which is close to the fixing section, is in transitional connection with the first side surface through the crack arrest groove, and the depth of the crack arrest groove is not more than 10% of the width of the testing section in the extending direction of the orthographic projection of the first side surface on the backlight surface; in the first state, the connection port is positioned within the edge of the display substrate; in the second state, the testing section is bent towards one side of the second side surface, which is far away from the first side surface, and the connecting port extends out of the edge of the display substrate.)

1. A display panel comprises a display substrate and a main flexible circuit board, wherein the display substrate is provided with a backlight surface; the main flexible circuit board includes:

the connecting section is arranged on the backlight surface, and the peripheral surface of the connecting section comprises a first side surface and a second side surface which are opposite;

the fixing section is attached to and fixed on the backlight surface, one end of the fixing section is connected with the first side surface, and the other end of the fixing section extends towards one side of the first side surface, which is far away from the second side surface;

one end of the test section is connected with the first side face, and the other end of the test section is provided with a connecting port; the side face, close to the fixing section, of the testing section is in transitional connection with the first side face through a crack arrest groove, and the crack arrest groove penetrates through the main flexible circuit board in the direction perpendicular to the backlight face; in the extending direction of the orthographic projection of the first side face on the backlight face, the depth of the crack-stopping groove is not more than 10% of the width of the test section; the test section is a flexible structure which can be converted between a first form and a second form;

in the first state, the test section is attached to the backlight surface, and the connection port is positioned within the edge of the display substrate;

in the second state, at least partial region of the test section is separated from the backlight surface and is bent towards one side of the second side surface, which is far away from the first side surface, and the connection port extends out of the edge of the display substrate.

2. The display panel of claim 1, wherein the anti-crack groove has an arc shape in an orthogonal projection of the backlight surface.

3. The display panel according to claim 2, wherein the crack stop groove is smoothly transitionally connected with the side surface of the test section close to the fixed section through an arc-shaped transition surface; the crack-stopping groove is in smooth transition connection with the first side face.

4. The display panel of claim 3, wherein a radius of an orthographic projection of the crack stop groove on the backlight surface and an orthographic projection of the transition surface on the backlight surface are the same.

5. The display panel of claim 4, wherein a radius of an orthographic projection of the crack stop groove on the backlight surface and an orthographic projection of the transition surface on the backlight surface is 0.3mm-0.7 mm.

6. The display panel of claim 1, wherein the anti-crack groove has a U-shape in an orthogonal projection of the backlight surface, the anti-crack groove has two opposite side walls, one side wall is coplanar with a side surface of the test segment close to the fixed segment, and the other side wall intersects with the first side surface.

7. The display panel according to claim 1, wherein the number of the anti-crack grooves is multiple, and the anti-crack grooves are sequentially connected between the first side surface and the side surface of the test section close to the fixed section, and two adjacent anti-crack grooves are in smooth transition connection.

8. The display panel according to claim 1, wherein the crack stop groove has two opposite sidewalls, and a distance between the two sidewalls is gradually reduced toward the second side surface.

9. The display panel of any of claims 1-8, wherein the connecting segment is a flexible structure that detachably contacts the backlight surface when the testing segment is in the first configuration.

10. The display panel of any of claims 1-8, wherein the display substrate has a light transmissive region between the fixed segment and the test segment in the first configuration;

the display panel further includes:

the fingerprint sensing unit is arranged on the backlight surface and is positioned between the fixed section and the test section in the first form, and the light transmission area is positioned in the projection of the backlight surface of the fingerprint sensing unit.

11. The display panel according to claim 10, wherein a receding hole is formed in a side surface of the fixed section, which is close to the test section, the receding hole penetrates through the fixed section in a direction perpendicular to the backlight surface, and a partial region of the contour of the light-transmitting region is located in the receding hole and is matched with the receding hole in shape.

12. The display panel of any one of claims 1-8, wherein a surface of the fixed segment proximate to the test segment is in smooth transition with the first side surface via an attachment slot that extends through the main flexible circuit board in a direction perpendicular to the backlight surface.

13. The display panel of any one of claims 1-8, wherein the display panel further comprises:

the touch layer is arranged on one side of the display substrate, which is far away from the backlight surface, or is integrated in the display substrate;

and the flexible touch circuit board is connected with the touch layer, bent to the backlight surface and connected with the fixed section.

14. A display device comprising the display panel according to any one of claims 1 to 13.

15. A terminal device comprising the display device according to claim 14.

Technical Field

The disclosure relates to the technical field of display, in particular to a display panel, a display device and terminal equipment.

Background

For terminal equipment such as mobile phones and computers, a display panel is an indispensable component of the terminal equipment, in the production process of the terminal equipment, in order to check whether the display panel is qualified, a test signal needs to be applied through a circuit board of the display panel to perform test work such as lighting test, and in the test process, the circuit board needs to be connected with the test equipment, but the existing test mode easily causes damage to the circuit board, so that the display panel cannot be normally used.

It is to be noted that the information disclosed in the above background section is only for enhancement of understanding of the background of the present disclosure, and thus may include information that does not constitute prior art known to those of ordinary skill in the art.

Disclosure of Invention

The present disclosure is directed to overcome the above disadvantages of the prior art, and provides a display panel, a display device and a terminal device, which can reduce the risk of circuit board damage.

According to one aspect of the present disclosure, there is provided a display panel including a display substrate having a backlight surface and a main flexible circuit board; the main flexible circuit board includes:

the connecting section is arranged on the backlight surface, and the peripheral surface of the connecting section comprises a first side surface and a second side surface which are opposite;

the fixing section is attached to and fixed on the backlight surface, one end of the fixing section is connected with the first side surface, and the other end of the fixing section extends towards one side of the first side surface, which is far away from the second side surface;

one end of the test section is connected with the first side face, and the other end of the test section is provided with a connecting port; the side face, close to the fixing section, of the testing section is in transitional connection with the first side face through a crack arrest groove, and the crack arrest groove penetrates through the main flexible circuit board in the direction perpendicular to the backlight face; in the extending direction of the orthographic projection of the first side face on the backlight face, the depth of the crack-stopping groove is not more than 10% of the width of the test section; the test section is a flexible structure which can be converted between a first form and a second form;

in the first state, the test section is attached to the backlight surface, and the connection port is positioned within the edge of the display substrate;

in the second state, at least partial region of the test section is separated from the backlight surface and is bent towards one side of the second side surface, which is far away from the first side surface, and the connection port extends out of the edge of the display substrate.

In an exemplary embodiment of the present disclosure, an orthographic projection of the crack stop groove on the backlight surface is arc-shaped.

In an exemplary embodiment of the disclosure, the crack-stopping groove and the side surface of the testing section close to the fixing section are connected in a smooth transition mode through an arc-shaped transition surface; the crack-stopping groove is in smooth transition connection with the first side face.

In an exemplary embodiment of the present disclosure, a radius of an orthographic projection of the crack stop groove on the backlight surface is the same as a radius of an orthographic projection of the transition surface on the backlight surface.

In an exemplary embodiment of the disclosure, a radius of an orthographic projection of the crack stop groove on the backlight surface and an orthographic projection of the transition surface on the backlight surface is 0.3mm to 0.7 mm.

In an exemplary embodiment of the disclosure, an orthogonal projection of the crack stop groove on the backlight surface is U-shaped, the crack stop groove has two opposite side walls, one side wall is coplanar with a side surface of the test section close to the fixed section, and the other side wall intersects with the first side surface.

In an exemplary embodiment of the disclosure, the number of the anti-crack grooves is multiple, and the anti-crack grooves are sequentially connected between the first side face and the side face of the testing section close to the fixing section, and two adjacent anti-crack grooves are in smooth transition connection.

In an exemplary embodiment of the present disclosure, the crack stop groove has two opposite sidewalls, and a distance between the two sidewalls is gradually decreased toward the second side surface.

In an exemplary embodiment of the disclosure, the connecting section is a flexible structure, and the connecting section is detachably contacted with the backlight surface when the testing section is in the first configuration.

In an exemplary embodiment of the present disclosure, the display substrate has a light-transmissive region between the fixing section and the testing section in the first configuration;

the display panel further includes:

the fingerprint sensing unit is arranged on the backlight surface and is positioned between the fixed section and the test section in the first form, and the light transmission area is positioned in the projection of the backlight surface of the fingerprint sensing unit.

In an exemplary embodiment of this disclosure, the side that the canned paragraph is close to the test section is equipped with dodges the hole, dodge the hole along the perpendicular to the direction of shady face runs through the canned paragraph, the subregion of the profile in printing opacity district is located dodge downtheholely, and with dodge the shape matching in hole.

In an exemplary embodiment of the present disclosure, a surface of the fixing section near the testing section is in smooth transition connection with the first side surface through a connection groove, and the connection groove penetrates through the main flexible circuit board in a direction perpendicular to the backlight surface.

In an exemplary embodiment of the present disclosure, the display panel further includes:

the touch layer is arranged on one side of the display substrate, which is far away from the backlight surface, or is integrated in the display substrate;

and the flexible touch circuit board is connected with the touch layer, bent to the backlight surface and connected with the fixed section.

According to an aspect of the present disclosure, there is provided a display device including the display panel of any one of the above.

According to an aspect of the present disclosure, there is provided a terminal device including the display apparatus of any one of the above.

According to the display panel, the display device and the terminal equipment, the fixing section of the main flexible circuit board is fixed on the backlight surface of the display substrate, so that the main flexible circuit board can be positioned; the connecting section can be connected with the fixing section and the testing section; the test section is operable to interface with test equipment to facilitate testing.

The test section can be in the first form after the test is not carried out or the test is finished, at the moment, the test section is attached to the backlight surface, the connecting port is located within the edge of the display substrate, and the connecting port is prevented from extending out of the edge of the display substrate and interfering with other structures, so that the display panel can be normally installed.

When the display panel needs to be tested, the testing section can be bent to the second shape by utilizing the flexibility of the testing section, and at the moment, the connecting port extends out of the edge of the display substrate, so that the connecting port can be connected with testing equipment to carry out testing.

Because the side that the test section is close to the fixed section passes through crack arrest groove transitional coupling with first side, can prevent that test section and linkage segment corner from appearing tearing because of the buckling of test section, simultaneously, crack arrest groove is favorable to making the test section can buckle in bigger range, prevents that the test section from appearing the "dead book" phenomenon that can't resume first form from the second form.

In addition, in the extending direction of the orthographic projection of the first side face on the backlight face, the depth of the crack arrest groove is not more than 10% of the width of the test section, the influence on the routing of the test section due to the too wide crack arrest groove can be avoided, and the phenomenon that the local strength is too low due to the too narrow corner where the test section is connected with the connecting section can be avoided.

It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the disclosure.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present disclosure and together with the description, serve to explain the principles of the disclosure. It is to be understood that the drawings in the following description are merely exemplary of the disclosure, and that other drawings may be derived from those drawings by one of ordinary skill in the art without the exercise of inventive faculty.

Fig. 1 is a partial top view of a test segment in a first configuration in an embodiment of a display panel according to the present disclosure.

FIG. 2 is a partial top view of a test segment in a second configuration in an embodiment of a display panel according to the present disclosure.

FIG. 3 is a side view of a test segment in a second configuration in an embodiment of a display panel according to the present disclosure.

Fig. 4 is a schematic view of a main flexible circuit board in a first form in a first embodiment of a display panel according to the present disclosure.

Fig. 5 is a partial schematic view of the main flexible circuit board of fig. 4.

Fig. 6 is a schematic view of a main flexible circuit board in a first form in a second embodiment of a display panel of the present disclosure.

Fig. 7 is a schematic view of a main flexible circuit board in a first form in a third embodiment of a display panel of the present disclosure.

Fig. 8 is a schematic view of a main flexible circuit board in a first form in a fourth embodiment of a display panel of the present disclosure.

Fig. 9 is a schematic view of a main flexible circuit board in a first state in a fifth embodiment of a display panel of the present disclosure.

Fig. 10 is a schematic view of a main flexible circuit board and a light-transmitting area in a first mode according to an embodiment of a display panel of the disclosure.

Fig. 11 is a schematic diagram of a chip on film flexible circuit board and a flexible touch circuit board according to an embodiment of the display panel.

Description of reference numerals:

001. testing equipment; 1. a display substrate; 11. a backlight surface; 12. a light-emitting surface; 101. driving the back plate; 102. a light emitting device layer; 2. a main flexible circuit board; 21. a connecting section; 211. a first side surface; 212. a second side surface; 22. a fixed section; 221. avoiding holes; 23. a testing section; 231. a connection port; 3. a fingerprint sensing unit; 4. a touch layer; 5. a flexible touch circuit board; 6. a chip on film flexible circuit board; 100. a crack stop groove; 200. a transition surface; 300. a light-transmitting region; 400. connecting grooves; 500. avoiding the gap.

Detailed Description

Example embodiments will now be described more fully with reference to the accompanying drawings. Example embodiments may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of example embodiments to those skilled in the art. The same reference numerals in the drawings denote the same or similar structures, and thus their detailed description will be omitted. Furthermore, the drawings are merely schematic illustrations of the present disclosure and are not necessarily drawn to scale.

Although relative terms, such as "upper" and "lower," may be used in this specification to describe one element of an icon relative to another, these terms are used in this specification for convenience only, e.g., in accordance with the orientation of the examples described in the figures. It will be appreciated that if the device of the icon were turned upside down, the element described as "upper" would become the element "lower". When a structure is "on" another structure, it may mean that the structure is integrally formed with the other structure, or that the structure is "directly" disposed on the other structure, or that the structure is "indirectly" disposed on the other structure via another structure.

The terms "a," "an," "the," "said" are used to indicate the presence of one or more elements/components/etc.; the terms "comprising" and "having" are intended to be inclusive and mean that there may be additional elements/components/etc. other than the listed elements/components/etc.; the terms "first," "second," and the like are used merely as labels, and are not limiting on the number of their objects.

In the related art, the display panel has a Main Flexible Printed Circuit (MFPC) for transmitting a driving signal and a power signal from a Main board of the terminal device to the display panel to display an image. For terminal equipment such as a mobile phone and the like with a display panel, in a production process, the display panel needs to be tested through test equipment so as to test the display panel. For example, when a lighting test is performed by the lighting test device, the lighting test device may input a test signal to the display panel to present a specific pattern, thereby determining whether the display panel can normally display.

During testing, the testing device is required to be connected with the main flexible circuit board of the display panel so as to input a testing signal, and for the convenience of connection, the main flexible circuit board is usually required to be bent so that the connection port of the main flexible circuit board extends out of the display panel so as to be connected with the testing device. However, in the bending process, the main flexible circuit board is easily torn, and when the pressure is too high, the phenomenon of 'dead fold' that exceeds the elastic limit and cannot be recovered easily occurs, so that the normal display of the display panel is affected, and even the display panel is scrapped. If the main flexible circuit board is not bent, the main flexible circuit board needs to be connected with the testing equipment through the switching device, so that the cost is increased, and the problems of tearing and the like still possibly occur in the connection and separation processes of the switching device.

The present disclosure provides a display panel, as shown in fig. 1 to 4, including a display substrate 1 and a main flexible circuit board 2, the display substrate 1 having a backlight surface 11; the main flexible circuit board 2 includes a connection section 21, a fixing section 22, and a test section 23, wherein:

the connecting section 21 is disposed on the backlight surface 11, and the outer peripheral surface of the connecting section 21 includes a first side surface 211 and a second side surface 212 which are opposite to each other.

The fixing section 22 is attached to and fixed on the backlight surface 11, one end of the fixing section 22 is connected to the first side surface 211, and the other end extends toward one side of the first side surface 211 departing from the second side surface 212.

One end of the testing section 23 is connected with the first side surface 211, and the other end has a connection port 231; the side surface of the testing section 23 close to the fixing section 22 is transitionally connected with the first side surface 211 through a crack-stopping groove 100, and the crack-stopping groove 100 penetrates through the main flexible circuit board 2 in the direction vertical to the backlight surface 11; in the extending direction of the orthographic projection of the first side surface 211 on the backlight surface 11, the depth of the crack arrest groove 100 is not more than 10% of the width of the test section; the test section 23 is a flexible structure that is capable of being switched between a first configuration and a second configuration.

In the first mode, the testing section 23 is attached to the backlight surface 11, and the connection port 231 is located within the edge of the display substrate 1;

in the second state, the testing section 23 is separated from the backlight surface 11 at least in a partial region, and is bent toward the side of the second side surface 212 away from the first side surface 211, and the connection port 231 extends out of the edge of the display substrate 1.

As shown in fig. 1, after the test is not performed or the test is completed, the test section 23 may be in the first configuration, at this time, the test section 23 is attached to the backlight surface 11, and the connection port 231 is located within the edge of the display substrate 1, so as to prevent the connection port 231 from extending out of the edge of the display substrate 1 and interfering with other structures, so as to normally mount the display panel.

As shown in fig. 2 and 3, when the display panel needs to be tested, the testing section 23 can be bent to the second configuration by the flexibility of the testing section 23, and the connection port 231 extends out of the edge of the display substrate 1, so that it can be connected to the testing device 001 for testing.

Because the side of the testing section 23 close to the fixing section 22 is transitionally connected with the first side 211 through the crack-stopping groove 100, the corner of the testing section 23 and the connecting section 21 is prevented from being torn due to the bending of the testing section 23, and meanwhile, the crack-stopping groove 100 is beneficial to enabling the testing section 23 to be bent in a larger amplitude, so that the phenomenon that the testing section 23 cannot be recovered from the second form to the first form is prevented from occurring.

In addition, in the extending direction of the orthographic projection of the first side surface 211 on the backlight surface 11, the depth of the crack arrest groove 100 is not more than 10% of the width of the test section, which can avoid the influence on the routing of the test section 23 due to the too wide crack arrest groove 100, and can avoid the too narrow corner where the test section 23 is connected with the connecting section 21 to cause the too low local strength.

The following is a detailed description of portions of the display panel of the present disclosure:

as shown in fig. 1-3, the display substrate 1 may have a back light surface 11 and a light emitting surface 12 opposite to each other, and may emit light through the light emitting surface 12 to display an image. The display substrate 1 may be an OLED (organic Light-Emitting Diode) display substrate, a liquid crystal display substrate, a micro LED (micro Light-Emitting Diode) display substrate, or the like. Taking an OLED display substrate as an example, in some embodiments of the present disclosure, the display substrate 1 includes a driving backplane 101 and a light emitting device layer 102 disposed on one side of the driving backplane 101, the light emitting device layer 102 may include a plurality of light emitting units, and the driving backplane 101 may drive each light emitting unit to independently emit light to display an image, and a specific display principle is not described in detail herein. The backlight surface 11 may be a surface of the driving back plate 101 facing away from the light emitting device layer 102, and the light emitting surface 12 may be a surface of the light emitting device layer 102 facing away from the driving back plate 101.

As shown in fig. 1 to 4, the main flexible circuit board 2 is disposed on the backlight surface 11 of the display substrate 1, and the main flexible circuit board 2 may include a connection section 21, a fixing section 22 and a testing section 23, the connection section 21 is connected between the fixing section 22 and the testing section 23, wherein:

as shown in fig. 4, the outer circumferential surface of the connecting segment 21 may include a first side surface 211 and a second side surface 212 which are opposite to each other, and the first side surface 211 may extend in a direction parallel to one side of the display substrate 1. For example, the orthographic projection of the connecting segment 21 on the backlight surface 11 is a rectangle, the first side surface 211 and the second side surface 212 may be side surfaces corresponding to two opposite side edges of the rectangle, and the distance between the first side surface 211 and the second side surface 212 is not particularly limited herein, for example, the distance between the first side surface 211 and the second side surface 212 may be 8mm to 12mm, for example, 10.7 mm.

In some embodiments of the present disclosure, the connection segment 21 is a flexible structure, for example, the connection segment 21 may include a flexible substrate made of polyimide or other flexible materials, and further include a circuit formed on the flexible substrate. When the testing section 23 is in the first configuration, the connecting section 21 may be detachably contacted with the backlight surface 11, that is, when the testing section 23 is in the first configuration, the connecting section 21 is freely attached to the backlight surface 11 and can be bent under an external force to be at least partially separated from the backlight surface 11.

In other embodiments of the present disclosure, the connecting segment 21 may also be fixed to the backlight surface 11 by bonding, welding or other means.

As shown in fig. 1, the fixing segment 22 may be attached to the backlight surface 11, and the fixing segment 22 may be fixed to the backlight surface 11 by bonding, welding or other methods, where one end of the fixing segment 22 is connected to the first side surface 211, and the other end extends away from the connecting segment 21. The fixed segment 22 may also be a flexible structure, for example, the fixed segment 22 may include a flexible substrate made of polyimide or other flexible materials, and further include a circuit formed on the flexible substrate.

In some embodiments of the present disclosure, an orthographic projection of the fixing segment 22 on the backlight surface 11 is a rectangle, one end of the fixing segment 22 corresponding to one short side of the rectangle is connected to the first side surface 211, and one end corresponding to the other short side of the rectangle extends in a direction away from the connecting segment 21, that is, extends to a side of the first side surface 211 away from the second side surface 212. The sides of the fixing segments 22 corresponding to the two short sides of the rectangle may be spaced apart by 65mm-38mm, for example 66.95mm, the spacing being the length of the fixing segments 22 in the direction away from the connecting segment 21.

Further, the extending direction of the fixing segment 22 may be perpendicular to the extending direction of the connecting segment 21, i.e., perpendicular to the first side surface 211.

As shown in fig. 1 to 4, one end of the testing section 23 is connected to the first side surface 211, and the other end has a connection port 231, and the specific structure of the connection port 231 is determined according to the testing equipment 001 to be connected, and is not particularly limited herein as long as the testing section can be connected to the testing equipment 001 in a pluggable manner and can transmit the testing signal.

The test section 23 is a flexible structure, and the test section 23 may also be a flexible structure, for example, the test section 23 may include a flexible substrate made of polyimide or other flexible materials, and further include a circuit formed on the flexible substrate.

In some embodiments of the present disclosure, the connection section 21, the fixing section 22, and the test section 23 of the main flexible circuit board 2 may share the same flexible substrate, that is, the connection section 21, the fixing section 22, and the test section 23 may be an integrated structure, and the circuit of the main flexible circuit board 2 is distributed in the connection section 21, the fixing section 22, and the test section 23, wherein the fixing section 22 is provided with a binding region of the circuit so as to bind the main flexible circuit board 2 with other circuit boards. In addition to this, the present invention is,

the testing section 23 can be bent to switch between a first configuration and a second configuration, as shown in fig. 4, the first configuration can be an untested configuration or a tested configuration, in the first configuration, the testing section 23 is attached to the backlight surface 11 and extends in a direction away from the connecting section 21, at this time, the connecting section 21, the fixing section 22 and the testing section 23 form a U-shaped structure, and of course, the lengths of the fixing section 22 and the testing section 23 can be different. Meanwhile, the connection port 231 is located within the edge of the display substrate 1, that is, the orthographic projection of the test segment 23 on the backlight surface 11 is located within the backlight surface 11, so that the test segment 23 does not extend out of the edge of the display substrate 1, thereby facilitating installation in a terminal device and avoiding interference with other structures.

Meanwhile, in the first configuration, the distance between the side of the testing section 23 close to the fixing section 22 and the side of the testing section away from the fixing section 22 may be the same as the distance between the first side 211 and the second side 212 of the connecting section 21, or may be different, for example, both may be 10.4 mm.

As shown in fig. 2 and 3, the test section 23 in the first configuration may be bent to be in the second configuration, in which at least a partial region of the test section 23 is separated from the backlight surface 11 and is bent toward a side of the second side surface 212 away from the first side surface 211, the connection port 231 extends out of the edge of the display substrate 1 to facilitate connection with the test equipment 001, and after the test is completed, the test section 23 may be released to return to the first configuration.

The side surface of the testing section 23 close to the fixing section 22 is transitionally connected with the first side surface 211 through the crack-stopping groove 100, that is, the crack-stopping groove 100 is arranged at the corner where the testing section 23 is connected with the first side surface 211 of the connecting section 21; meanwhile, the crack stopper groove 100 penetrates the main flexible circuit board 2 in a direction perpendicular to the backlight surface 11, that is, in the direction perpendicular to the backlight surface 11, the crack stopper groove 100 exposes the backlight surface 11. When the test section 23 is bent from the first form to the second form, the crack-stopping groove 100 can prevent the test section 23 from being torn, and meanwhile, the crack-stopping groove 100 can reduce the risk of 'dead break' of the test section 23.

The following is an exemplary description of a specific embodiment of the crack stop groove 100:

as shown in fig. 4-6, in some embodiments of the present disclosure, the crack stopper groove 100 has an arc shape, such as a circular arc or an elliptical arc, in the orthographic projection of the backlight surface 11.

As shown in fig. 4 and 5, in the first embodiment of the present disclosure, the first side 211 and the side of the testing section 23 adjacent to the fixing section 22 are perpendicular planes. The shape of the orthographic projection of the crack arrest groove 100 on the backlight surface 11 is circular arc, the crack arrest groove 100 is in smooth transition connection with the side surface of the test section 23 close to the fixed section 22 through an arc transition surface 200, the crack arrest groove 100 is in smooth transition connection with the first side surface 211, and the first side surface 211 is tangent to the crack arrest groove 100.

Further, as shown in fig. 4 and 5, the orthographic projection of the crack arrest groove 100 on the backlight surface 11 and the orthographic projection of the transition surface 200 on the backlight surface 11 are arcs with the same radius, the two arcs are circumscribed, and the radius can be 0.5 mm.

In a third embodiment of the present disclosure, as shown in fig. 7, the first side 211 and the side of the testing section 23 adjacent to the fixing section 22 are perpendicular planes. The orthogonal projection of the crack arrest groove 100 on the backlight surface 11 is U-shaped, and the crack arrest groove 100 has two opposite side walls, wherein one side wall of the crack arrest groove 100 is coplanar with the side surface of the test section 23 close to the fixed section 22, and the other side wall intersects with the first side surface 211, and the intersection can be vertical.

Of course, in other embodiments of the present disclosure, one sidewall of the crack stop slot 100 intersects the side of the test segment 23 adjacent to the fixed segment 22, and the other sidewall is coplanar with the first side 211.

As shown in fig. 8, in the fourth embodiment of the present disclosure, the number of the crack arrest grooves 100 is plural, and the crack arrest grooves 100 are sequentially connected between the first side surface 211 and the side surface of the test section 23 close to the fixing section 22, and two adjacent crack arrest grooves 100 are connected by a smooth transition of a smooth curved surface. The orthogonal projection of each of the crack stop grooves 100 on the backlight surface 11 may have the same shape, for example, a U-shape. Of course, the orthogonal projection shapes of the different crack stop grooves 100 on the backlight surface 11 may be different.

For example, the number of the crack stoppers 100 is two, and orthographic projections of the two crack stoppers 100 on the backlight surface 11 are both U-shaped, and the openings of the U-shapes are perpendicular to each other.

In a fifth embodiment of the present disclosure, as shown in fig. 9, the crack stopper 100 has two opposite sidewalls, and the distance between the two sidewalls is gradually decreased toward the second side 212. For example, the orthographic projection of the crack arrest groove 100 on the backlight surface 11 is V-shaped, and the two side walls are two intersecting planes with an included angle smaller than 90 °.

In addition, in the extending direction of the orthographic projection of the first side surface 211 on the backlight surface 11, the depth of the crack arrest groove 100 is not more than 10% of the width of the test section 23, and the depth of the crack arrest groove 100 in the extending direction is: in this direction of extension, the crack stopper groove 100 is at a distance from the surface of the test section 23 closest to the fixed section 22 to the surface of the test section 23 closest to the fixed section 22.

For example, the orthographic projection of the connecting segment 21 on the backlight surface 11 is a rectangle, the first side surface 211 corresponds to a long side of the rectangle, and the extending direction of the orthographic projection of the first side surface 211 on the backlight surface 11 is the length direction of the rectangle. With reference to the crack arrest groove 100 of the first embodiment, the width of the test segment 23 in the length direction is 10.4mm, and the orthographic projection of the crack arrest groove 100 on the backlight surface 11 and the orthographic projection of the transition surface 200 on the backlight surface 11 are circular arcs with a radius of 0.5mm, that is, the depth of the crack arrest groove 100 in the length direction is 1 mm.

In addition, the display panel of the present disclosure may further have an underscreen fingerprint recognition function, as shown in fig. 1, fig. 2 and fig. 10, in some embodiments of the present disclosure, the display substrate 1 may have a light-transmitting region 300, and the light-transmitting region 300 may be an open structure or a transparent solid structure. Meanwhile, the display panel may further include a fingerprint sensing unit 3, the fingerprint sensing unit 3 may be disposed on the backlight surface 11, and the light-transmitting area 300 is located in the projection of the fingerprint sensing unit 3 on the backlight surface 11, and the fingerprint sensing unit 3 may include a photoelectric sensor for sensing light reflected by the valley and ridge of the finger, so as to generate a signal reflecting fingerprint information.

In order to avoid the light-transmitting area 300 and the fingerprint sensing unit 3 being blocked by the main flexible circuit board 2, the light-transmitting area 300 and the fingerprint sensing unit 3 may be located between the fixed section 22 and the testing section 23 in the first configuration.

Further, as shown in fig. 10, a relief hole 221 may be formed in a side surface of the fixing section 22 close to the testing section 23, the relief hole 221 penetrates through the fixing section 22 along a direction perpendicular to the backlight surface 11, and a partial region of the contour of the light-transmitting region 300 is located in the relief hole 221 and is matched with the shape of the relief hole 221.

In some embodiments of the present disclosure, as shown in fig. 4, the surface of the fixing section 22 close to the testing section 23 and the first side surface 211 may be smoothly transitionally connected by a connection slot 400, and the connection slot 400 penetrates the main flexible circuit board 2 in a direction perpendicular to the backlight surface 11.

For example, the orthogonal projection of the connection slot 400 on the backlight surface 11 may be U-shaped, and includes two opposite sidewalls, one of which is coplanar with the first side surface 211, and the other of which intersects, e.g., is perpendicular to, the surface of the fixing segment 22 near the testing segment 23.

In some embodiments of the present disclosure, as shown in fig. 4, a surface of the fixing section 22 facing away from the testing section 23 and the second side surface 212 may be connected by a smooth transition through an avoidance gap 500, and the avoidance gap 500 may penetrate through the main flexible circuit board 2 in a direction perpendicular to the backlight surface 11.

Further, in some embodiments of the present disclosure, as shown in fig. 2 and 11, the display panel of the present disclosure may further include a touch layer 4 and a flexible touch circuit board 5, wherein:

the display substrate 1 may further include a touch layer 4 and a flexible touch circuit board 5, the touch layer 4 may include a touch electrode, the touch electrode may be externally hung on a side of the light emitting surface 12 of the display substrate 1 away from the backlight surface 11, and may also be integrated in the display substrate 1, and the specific principle and structure of the touch layer 4 are not particularly limited herein as long as the touch function can be achieved.

The flexible touch circuit board 5 is connected to the touch layer 4, bent to the backlight surface 11, and connected to the fixing section 22. The flexible touch circuit board 5 may be configured to output a driving signal to the touch layer 4, and determine a touch area according to feedback of the touch layer 4.

In addition, as shown in fig. 11, the display panel of the present disclosure may further include a Chip On Film (COF) flexible circuit board 6, where the COF flexible circuit board 6 is connected to the display substrate 1, bent to the backlight surface 11, and connected to the fixing section 22. Specifically, the method comprises the following steps:

the display substrate 1 comprises a driving back plate 101 and a light emitting device layer 102 arranged on one side of the driving back plate 101, the driving back plate 101 is provided with a binding area exposed by the light emitting device layer 102, one end of the chip on film flexible circuit board 6 can be bound with the binding area, the other end of the chip on film flexible circuit board is bent to the backlight surface 11 and is connected with the fixed section 22, so that the main flexible circuit board 2 transmits signals to the display substrate 1, and image display is controlled.

The display panel of any of the above embodiments is provided, and the specific structure of the display panel is not described herein again, and the beneficial effects of the display device can be referred to the display panel and are not described herein in detail.

The display panel and the display device can be referred to for the beneficial effects, and are not described herein again. The terminal device of the present disclosure may be an electronic device with an image display function, such as a mobile phone, a tablet computer, a television, etc., which are not listed here.

Other embodiments of the disclosure will be apparent to those skilled in the art from consideration of the specification and practice of the disclosure disclosed herein. This application is intended to cover any variations, uses, or adaptations of the disclosure following, in general, the principles of the disclosure and including such departures from the present disclosure as come within known or customary practice within the art to which the disclosure pertains. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the disclosure being indicated by the following claims.