CN110517591B

CN110517591B - Foldable display module and display device

Info

Publication number: CN110517591B
Application number: CN201910830413.5A
Authority: CN
Inventors: 于泉鹏
Original assignee: Shanghai Tianma Microelectronics Co Ltd
Current assignee: Shanghai Tianma Microelectronics Co Ltd
Priority date: 2019-09-04
Filing date: 2019-09-04
Publication date: 2021-10-01
Anticipated expiration: 2039-09-04
Also published as: CN110517591A

Abstract

The invention provides a foldable display module and a display device. The foldable display module comprises a display panel, wherein the display panel is provided with a folding area and a non-folding area; the hinge is located the one side that deviates from display panel display surface, including first component and second component, and N first components are articulated in proper order, in N first components of articulated in proper order: the first member and the Nth first member are respectively hinged with a second member; the two first members which are hinged with each other, the first members which are hinged with each other and the second members which are hinged with each other correspond to a hinge control mechanism, and the hinge control mechanism is used for controlling the hinge parts to be in a locking state after receiving a first voltage signal; the folding control module is electrically connected with the hinge control mechanisms and used for sending first voltage signals to the n hinge control mechanisms in one-time folding process. The invention can realize that the position of the folding shaft is not fixed, and avoid the same crease position from bearing continuous stress.

Description

Foldable display module and display device

[ technical field ] A method for producing a semiconductor device

The invention relates to the technical field of display, in particular to a foldable display module and a display device.

[ background of the invention ]

With the development of display technology, the organic light emitting display technology has become the key point of research and development of various manufacturers due to the characteristics of self-luminescence, light weight, thin thickness, fast response, low power consumption, capability of realizing flexible display and the like. Foldable display is a display technology that arises from the turn, and foldable display is that the display screen can be folded, carries out the large-size display under the expanded state, increases display area, carries out the small-size display under fold condition, again can save space to portable. The user can freely switch between the small-screen display and the large-screen display when using the display device. The existing foldable display panel is usually made of a flexible film material, and although the foldable display panel can be easily folded, the foldable display panel can be folded by being easily folded, but the foldable display panel can be unfolded for many times and then cannot be flat, and the film material at the folded part can be tilted.

[ summary of the invention ]

In view of this, embodiments of the present invention provide a foldable display module and a display device, so as to solve the problems of uneven bent portion and tilting of a film material after a foldable display device is bent for multiple times in the prior art.

In a first aspect, the present invention provides a foldable display module, comprising:

the display panel is provided with a folding area and a non-folding area, and the folding area is positioned between the two non-folding areas;

the hinge, is located the one side that deviates from the display panel display surface, includes: a first member and a second member, the N first members being sequentially articulated, in the N first members being sequentially articulated: the first member and the Nth first member are respectively hinged with a second member, N is a positive integer and is more than or equal to 2, the foldable display module is provided with an unfolded state, in the unfolded state, the N first members are overlapped with the folding area, and the second member is overlapped with the unfolded area;

the hinge control mechanism is used for receiving a first voltage signal and then controlling the hinge part to be in a locked state, and the two members hinged to each other cannot rotate mutually under the locked state;

the folding control module is electrically connected with the hinge control mechanisms, the foldable display module is provided with a folding state, the folding control module is used for sending first voltage signals to N hinge control mechanisms in a folding process, wherein N is a positive integer, and N is more than or equal to 1 and less than N + 1.

In a second aspect, based on the same inventive concept, an embodiment of the present invention provides a display device, including any one of the foldable display modules provided in the present invention.

The foldable display module and the display device provided by the embodiment of the invention have the following beneficial effects:

according to the embodiment of the invention, the state of the hinge part corresponding to the hinge control mechanism is controlled by sending the control signal to the hinge control mechanism through the folding control module, and the first voltage signal is sent to the n hinge control mechanisms in one folding process, so that the corresponding n hinge parts are in a locking state, namely in the folding process, part of the hinge parts are in the locking state, and part of the hinge parts are in a free state. The hinge parts in the locking state are different, and the folding shafts of the display module are different when the display module is folded. Compared with the prior art, the position of the folding shaft of the foldable display module is not fixed, and the change of stress strain borne by the bulging position during folding can be realized through the change of the position of the folding shaft during folding, so that the situation that the same crease position bears continuous stress is avoided. The foldable display module can avoid the problems of unevenness after flattening, tilting of a film material at a folding part and the like caused by repeatedly bending the same position for many times, and can improve the folding performance of the foldable display module.

[ description of the drawings ]

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.

Fig. 1 is a schematic top view of a foldable display module according to an embodiment of the present invention;

fig. 2 is a schematic diagram illustrating a folded state of the foldable display module according to the embodiment of the present invention;

FIG. 3 is a schematic cross-sectional view taken along line A-A' of FIG. 1;

FIG. 4 is a schematic diagram illustrating a folded state of a foldable display module according to an embodiment of the present invention;

FIG. 5 is a schematic diagram illustrating another foldable display module according to an embodiment of the present invention;

FIG. 6 is a schematic diagram illustrating an alternative embodiment of a hinge control mechanism of a display module according to an embodiment of the present invention;

FIG. 7 is a schematic view of the embodiment of FIG. 6 with two members hinged to each other in a free state;

fig. 8 is a schematic view of a film structure of an alternative embodiment of a display module according to an embodiment of the invention;

FIG. 9 is a schematic view illustrating a hinge of a display module according to another folded state of the present invention;

FIG. 10 is a schematic view illustrating a hinge of a display module according to an embodiment of the present invention being folded;

FIG. 11 is a first schematic diagram illustrating a comparison of hinge bending between two adjacent folded states of a foldable display module according to an embodiment of the present invention;

FIG. 12 is a second schematic diagram illustrating a comparison of hinge bending between two adjacent folded states of the foldable display module according to the embodiment of the present invention;

fig. 13 is a schematic view of a display device according to an embodiment of the present invention.

[ detailed description ] embodiments

For better understanding of the technical solutions of the present invention, the following detailed descriptions of the embodiments of the present invention are provided with reference to the accompanying drawings.

It should be understood that the described embodiments are only some embodiments of the invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

The terminology used in the embodiments of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used in the examples of the present invention and the appended claims, the singular forms "a," "an," and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise.

It should be understood that the term "and/or" as used herein is merely one type of association that describes an associated object, meaning that three relationships may exist, e.g., a and/or B may mean: a exists alone, A and B exist simultaneously, and B exists alone. In addition, the character "/" herein generally indicates that the former and latter related objects are in an "or" relationship.

The embodiment of the invention provides a display module, wherein hinge control mechanisms are correspondingly arranged on two mutually hinged members of a hinge, the hinge control mechanisms can control the locking state of the two mutually hinged members, the two mutually hinged members cannot rotate mutually in the locking state, and the hinge control mechanisms are controlled by a folding control module. In the primary folding process, the folding control module sends a first voltage signal to N hinge control mechanisms, N hinge parts of N +1 hinge parts of the hinges are controlled by the hinge control mechanisms to be in a locking state, the folding shafts in different folding processes change according to the states of the hinge parts, the positions of the folding shafts are not fixed, the stress strain of the bulging positions can be changed in the folding process through the change of the positions in the folding process, and therefore the crease positions are prevented from bearing continuous stress.

Fig. 1 is a schematic top view of a foldable display module according to an embodiment of the present invention, and fig. 2 is a schematic folded state of the foldable display module according to the embodiment of the present invention. Fig. 3 is a schematic cross-sectional view taken along line a-a' of fig. 1. Fig. 4 is a schematic diagram illustrating a folded state of the foldable display module according to an embodiment of the present invention. Fig. 5 is a schematic diagram of another foldable display module according to an embodiment of the present invention.

As shown in fig. 1, the foldable display module includes: a display panel 11, the display panel 11 having a folding zone Z and a non-folding zone FZ, the folding zone Z being located between the two non-folding zones FZ; fig. 1 illustrates the display module in an unfolded state, i.e. an unfolded state, such as fig. 3 illustrates a folded state of the display module, in which the folding region Z of the display panel 11 is bent.

As shown in fig. 3, the foldable display module further includes a hinge 12 located on a side away from the display surface of the display panel 11, where the display surface of the display panel is a surface of a side of a display screen, in an embodiment of the present invention, the display panel 11 may be an organic light emitting display panel, and the display panel 11 includes an array layer, a display layer and a light emitting layer, which is only simplified and illustrated in fig. 3, and a specific film structure of the display panel is not shown. The hinge 12 includes: a first member 1G and a second member 2G, N first members 1G being sequentially hinged, in the N sequentially hinged first members 1G: the first member 1G and the Nth first member 1G are respectively hinged with a second member 2G, N is a positive integer and is more than or equal to 2, and the number of the first members 1G in figure 3 is only schematically shown. The foldable display module has an unfolded state in which the N first members 1G overlap the folding zone Z and the second members 2G overlap the non-folding zone FZ, that is, a state illustrated in fig. 1 and 3. It should be noted that the position of the two members hinged to each other in fig. 3 is only shown in a simplified manner, and the present invention can use any kind of hinge in the prior art to realize the hinge between the two first members and the hinge between the first member and the second member. Alternatively, one or more hinges may be provided between two members hinged to each other to effect the hinging.

The hinge control mechanism 13 is used for receiving a first voltage signal and controlling a hinge part to be in a locked state after the hinge control mechanism 13 is used for receiving the first voltage signal, and the two mutually hinged members cannot rotate mutually in the locked state. The articulation control mechanism 13 controls the relative position of the two members articulated to each other to be fixed after receiving the first voltage signal. The specific structure of the articulation control mechanism 13 is not shown. In the embodiment of the present invention, two members hinged to each other correspond to one hinge control mechanism, so that N +1 hinge control mechanisms 13 are correspondingly disposed on the hinge 12.

The folding control module 14, the folding control module 14 is a computer program stored in the driver chip IC, and is only illustrated as a block diagram. The folding control module 14 is electrically connected with the hinge control mechanisms 13, the foldable display module has a folding state, and the folding control module 14 is used for sending a first voltage signal to N hinge control mechanisms 13 in one folding process, wherein N is a positive integer, and N is greater than or equal to 1 and less than N + 1. That is, in one folding process, the folding control module 14 can control the n hinge points to be in a locked state through the hinge control mechanism 13.

In the folded state illustrated in fig. 4, taking the example that the hinge includes 9 first members 1G, during one folding process, the folding control module 14 sends a first voltage signal to 2 hinge control mechanisms 13, and then 2 hinge portions in the hinge are in a locked state, and three first members 1G adjacent to each other in sequence are fixed and cannot rotate as illustrated by the position of the region Q1 in the figure, which is only illustrated in a simplified manner in fig. 4 and does not illustrate the folding control module 14 and the hinge control mechanisms 13. In the folded state as shown in fig. 5, the folding control module 14 sends a first voltage signal to the 2 hinge control mechanisms 13 to control the 2 hinge positions in the hinge to be in the locked state as shown in the position of the area Q2 in the figure, as in fig. 4. When the folding region Z is bent, a local region (e.g., position Q1 in fig. 4, position Q2 in fig. 5) on the display panel 11 corresponding to the two members in the dead-lock state is flat and not bent, while a region on the display panel 11 corresponding to the member in the free state is bent. As can be seen from the folded state illustrated in fig. 4 and the folded state illustrated in fig. 5, in the two different folded states, the folding region Z of the display panel is different in bending shape along with the hinge, and the folding axis in the folding region Z is different if the bending position in the folding region Z is different. Fig. 4 and 5 each illustrate the case where the first voltage signal is sent to two adjacent articulation control mechanisms.

During the folding process, the folding control module can send a first voltage signal to n hinge control mechanisms, and the n hinge control mechanisms can be adjacent, non-adjacent or partially adjacent in sequence. The process that the folding control module outputs a first voltage signal is a folding process, and in one folding process, the number of the hinge control mechanisms receiving the first voltage signal and the positions of the hinge mechanisms corresponding to the hinge control mechanisms in the hinges determine the bending shape of a folding area in the folding process. Therefore, the folding shape of the folding area of the foldable display module provided by the embodiment of the invention is not unique in the folding state, the folding area can present various folding shapes in the folding state according to the control of the folding control module, and the folding axes of the folding area are different in different folding shapes.

According to the foldable display module provided by the embodiment of the invention, the state of the hinge part corresponding to the hinge control mechanism is controlled by sending the control signal to the hinge control mechanism through the folding control module, and the first voltage signal is sent to the n hinge control mechanisms in one folding process, so that the corresponding n hinge parts are in a locking state, namely, in the folding process, part of the hinge parts are in the locking state, and part of the hinge parts are in a free state. The hinge parts in the locking state are different, and the folding shafts of the display module are different when the display module is folded. Compared with the prior art, the position of the folding shaft of the foldable display module is not fixed, and the change of stress strain borne by the bulging position during folding can be realized through the change of the position of the folding shaft during folding, so that the situation that the same crease position bears continuous stress is avoided. The foldable display module can avoid the problems of unevenness after flattening, tilting of a film material at a folding part and the like caused by repeatedly bending the same position for many times, and can improve the folding performance of the foldable display module.

Optionally, the folding state of the foldable display module provided in the embodiment of the present invention further includes: all the hinged parts are in the folded state which is assumed when in the free state, namely, the folding control module does not send a first voltage signal to any hinged control mechanism in the folding process.

In an embodiment, fig. 6 is a schematic diagram illustrating an alternative implementation of a hinge control mechanism of a display module according to an embodiment of the present invention. Fig. 7 is a schematic view of the embodiment according to fig. 6 with two mutually hinged members in a free state. As shown in fig. 6, taking the articulation control mechanism 13 corresponding to the two first mutually articulated members 1G as an example, the articulation control mechanism 13 includes a group of electromagnet blocks, one group of electromagnet blocks includes two electromagnet blocks DC, and the two electromagnet blocks DC are respectively disposed on the two mutually articulated members. As illustrated in the figure, electromagnet blocks DC are provided on two first members 1G hinged to each other. In the folding process, the folding control module 14 sends a first voltage signal to the electromagnetic block DC, the electromagnetic block DC generates magnetism after being electrified, and two first members 1G hinged to each other can be linearly arranged according to the principle that like poles repel each other, as shown in fig. 6. That is, the two first members 1G are locked and cannot rotate with each other. When the folding control module 14 does not send a voltage signal to the electromagnet block DC, there is no magnetism on the electromagnet block DC, and as shown in fig. 7, the two first members 1G hinged to each other can be in a freely rotatable state. In this embodiment, the number of the electromagnet block groups provided on the two members hinged to each other is not limited.

The state of two components hinged with each other is controlled by the electromagnetic block set, when a voltage signal is provided to the electromagnetic block set, the electromagnetic block generates magnetism, and the two components are in a locking state of linear arrangement; when no voltage signal is supplied to the electromagnet block set, no magnetism exists on the electromagnet block, and the two components can be in a free state of free rotation. The mode is adopted to realize the control of the hinged parts of the two mutually hinged members, the structure of the hinged control mechanism is simple, the control mode is simple, and the occupied area in the module is small.

As shown in fig. 3, the display module further includes a back adhesive layer 15, and the back adhesive layer 15 is disposed between the display panel 11 and the hinge 12 in the non-folding area FZ. Set up the gum layer in non-folding district and guarantee to bond as an organic whole between display panel and the hinge, realize that the hinge drives display panel and folds. In addition, the back glue layer is not arranged in the folding area, so that the first member can move relative to the display panel, the locking of a part of hinged parts and the free folding state of the part of hinged parts can be realized, the change of folding shafts in different folding states is realized, and the situation that the same crease position bears continuous stress is avoided. The foldable display module can avoid the problems of unevenness after flattening, tilting of a film material at a folding part and the like caused by repeatedly bending the same position for many times, and can improve the folding performance of the foldable display module.

In an embodiment, fig. 8 is a schematic diagram of a film structure of an optional implementation manner of a display module according to an embodiment of the present invention, as shown in fig. 8, a display panel 11 includes a substrate 111, an array layer 112, and a display layer 113, which are sequentially stacked, where the display layer 113 includes a plurality of light emitting devices P, and the light emitting devices P include an anode a, a light emitting layer b, and a cathode c, which are located on a side of the array layer 112 away from the substrate 111 and are sequentially stacked. The array layer 112 includes a plurality of thin film transistors T, and optionally, the drains of the thin film transistors T are electrically connected to the anode a of the light emitting device P, and fig. 8 illustrates only the thin film transistors with a top gate structure, and optionally, the thin film transistors in the present invention may also be a bottom gate structure. Optionally, an encapsulation structure is further disposed on the display layer 113, and the encapsulation structure may be a thin film encapsulation layer, and at least includes an inorganic layer and an organic layer. The packaging structure can play a role in blocking water and oxygen, and the service life of the light-emitting device is ensured.

In one embodiment, the hinge control mechanism 13 is further configured to control the hinge portion to be in a free state after receiving the second voltage signal, and the two members hinged to each other in the free state can rotate relative to each other; the folding control module 14 is also configured to send a second voltage signal to the remaining N +1-N articulation control mechanisms during a folding process. Taking the above fig. 4 or fig. 5 as an example, if the hinge includes 9 first members 1G, then 10 hinge control mechanisms are correspondingly included, and in the folding process illustrated in fig. 4 or fig. 5, the folding control module sends a first voltage signal to 2 hinge control mechanisms to control 2 hinge portions to be in a locked state, and simultaneously sends a second voltage signal to the remaining 8 hinge control mechanisms to control the remaining 8 hinge portions to be in a free state. This embodiment guarantees under voltage signal's control that each articulated position can be accurately in the state that it should be in (namely free state or lock state) in folding process, guarantees that folding process can accomplish folding according to the folding mode that program control corresponds, guarantees that folding district can present multiple bending shape in folding process, realizes the change of folding process bending axis.

Optionally, in an embodiment, the first voltage signal controls the hinge portion to be in a locked state, and the hinge portion continues to be in the locked state without changing the voltage signal; the second voltage signal controls the hinged part to be converted into a free state, so that the hinged part can rotate freely, and the folding is facilitated.

Alternatively, taking the hinge control mechanism 13 illustrated in fig. 6 and 7 as an example, in an embodiment, the display module may not be provided with the second voltage signal, and the folding control module 14 controls the electromagnetic block DC to generate magnetism through the first voltage signal, so as to realize a dead-lock state in which two members hinged to each other are linearly arranged. When the folding control module 14 does not provide any signal to the electromagnetic block DC, the electromagnetic block DC is not magnetic, and the two mutually hinged members are in a free state.

In the foldable display module provided by the embodiment of the invention, n hinge control mechanisms which are adjacent in sequence receive a first voltage signal in a folding process, wherein the n hinge control mechanisms can be adjacent in sequence, or the n hinge control mechanisms are not adjacent in sequence, or the n hinge control mechanisms are partially adjacent.

In one embodiment, when n is more than or equal to 2, n hinge control mechanisms which are adjacent in sequence receive a first voltage signal in one folding process; fig. 9 is a schematic view illustrating a hinge of a display module according to another folded state of the present invention. As shown in fig. 9, only the bending state of the hinge is illustrated, taking N as 10 and N as 3 as examples, the display module includes 11 hinge control mechanisms 13, and the adjacent 3 hinge control mechanisms 13 are in a locked state corresponding to the 4 first members 1G hinged in sequence, such as the 3 rd hinge control mechanism 133, the 4 th hinge control mechanism 134, and the 5 th hinge control mechanism 135 illustrated in the figure.

In one embodiment, when n is greater than or equal to 2, at least m hinge control mechanisms which are not adjacent in sequence receive the first voltage signal in one folding process, m is a positive integer, and m is greater than or equal to 2 and less than or equal to n. Fig. 10 is a schematic view illustrating a hinge bending in another folded state of the display module according to the embodiment of the invention. As shown in fig. 10, only the bending state of the hinge is illustrated, and also N is 10, N is 3, in this embodiment, m is 3, that is, none of the hinge control mechanisms receiving the first voltage signal during one folding process are adjacent, such as the 3 rd hinge control mechanism 133, the 5 th hinge control mechanism 135, and the 8 th hinge control mechanism 138 illustrated in the figure.

In one embodiment, when N is 10 and N is 3, m is 1, that is, 3 hinge control mechanisms receive the first voltage signal during a folding process, where two hinge control mechanisms are adjacent and the other hinge control mechanism is not adjacent.

In one embodiment, the foldable display module has a folding cycle, wherein one folding cycle comprises a plurality of non-repetitive folding processes, and all the hinge control mechanisms receive the first voltage signal for the same number of times in one folding cycle. In the foldable display module provided by the embodiment of the invention, the process of outputting a first voltage signal by the folding control module is a folding process, and the number of the hinge control mechanisms for receiving the first voltage signal and the positions of the hinge mechanisms corresponding to the hinge control mechanisms in the hinge determine the bending shape of the folding area in the folding process in one folding process. The non-repetitive folding process means that the folding shapes of the folding areas in any two folding states in the folding cycle are different, so that the folding positions of the display module in any two folding states are different in one folding cycle. In the embodiment, the folding cycle is set, so that the times that all the hinge control mechanisms receive the first voltage signals are equal in one folding cycle, and therefore, all parts in the folding area can be uniformly folded in one folding cycle, uniform stress of all the parts is guaranteed, and the folding performance of the foldable display module is improved.

In one embodiment, the foldable display module further includes a cycle determination module electrically connected to the folding control module, the cycle determination module is configured to determine whether a folding cycle is completed, and when the folding cycle is completed, control the folding control module to enter a control mode of a next folding cycle. Wherein, completing a folding cycle means that all folding processes in a folding cycle are performed once. Optionally, the cycle determining module determines whether to complete a folding cycle by recording position data of the first voltage signal sent by the folding control module in each folding process, wherein the position data of the first voltage signal sent corresponds to a position of the first voltage signal received at the hinge control mechanism. Through setting up circulation judgment module, the realization is folded collapsible display module assembly according to folding circulation when using, can avoid buckling same position many times and cause unevenness, folding part membrane material perk scheduling problem behind the exhibition flat, can promote collapsible display module assembly's folding performance. Meanwhile, all parts in the folding area are guaranteed to be uniformly folded, uniform stress of all parts is guaranteed, and folding performance of the foldable display module is improved.

In one embodiment, in the first folding process, the folding control module sends a first voltage signal to N1 hinge control mechanisms, in the second folding process, the folding control module sends a first voltage signal to N2 hinge control mechanisms, the first folding process and the second folding process are two adjacent folding processes, N1 and N2 are positive integers, and N1+ N2 is more than or equal to 1 and less than or equal to N + 1; wherein the n1 articulation control mechanisms and the n2 articulation control mechanisms do not intersect. Fig. 11 is a first schematic diagram illustrating a comparison of hinge bending in two adjacent folding states of the foldable display module according to the embodiment of the invention. As shown in fig. 11, taking the example that the hinge includes 10

first members

1G, 11 hinge control mechanisms 13 are correspondingly disposed in the display module. In the first folding process (1), the 3 rd hinge control mechanism 133, the 4 th hinge control mechanism 134, and the 5 th hinge control mechanism 135, and 3 hinge control mechanisms 13 receive the first voltage signal, that is, n1 is 3. In the second folding process (2), the 6 th hinge control mechanism 136, the 7 th hinge control mechanism 137, and the 11 th hinge control mechanism 1311, and 3 hinge control mechanisms 13 receive the first voltage signal, that is, n2 is 3. In the embodiment, when two adjacent folding processes are set, the hinge control mechanisms receiving the first voltage signals are different, so that the areas in the folding areas in the flat and non-bending states (namely the areas of the display panels corresponding to the mutually hinged mechanisms with the hinge parts in the locking states) in the two adjacent folding processes are different, namely, a certain area in the folding area is flat and non-bending in the last folding process, and bending can occur in the next folding process, so that the area is switched between bending and non-bending in the two folding processes, the situation that the same area continuously bears the same stress in the two adjacent folding processes is avoided, and the problems that the flat and non-flat areas are formed at the same position due to repeated bending for many times, the folding part of the membrane material is tilted and the like are avoided.

In one embodiment, in the first folding process, the folding control module sends a first voltage signal to N1 hinge control mechanisms, in the second folding process, the folding control module sends a first voltage signal to N2 hinge control mechanisms, the first folding process and the second folding process are two adjacent folding processes, N1 and N2 are positive integers, N1 is more than or equal to 1 and less than or equal to N +1, and N2 is more than or equal to 1 and less than N + 1; wherein p identical articulation control mechanisms are present among the n1 articulation control mechanisms and the n2 articulation control mechanisms, p being a positive integer and 1 ≦ p ≦ (n1, n2), wherein (n1, n2) indicates the smallest number of n1 and n2 options. Fig. 12 is a second schematic diagram illustrating a comparison of hinge bending between two adjacent folded states of the foldable display module according to the embodiment of the invention. As shown in fig. 12, taking the example that the hinge includes 10

first members

1G, 11 hinge control mechanisms 13 are correspondingly disposed in the display module. In the first folding process (1), the 3 rd hinge control mechanism 133, the 4 th hinge control mechanism 134, and the 5 th hinge control mechanism 135, and 3 hinge control mechanisms 13 receive the first voltage signal, that is, n1 is 3. In the second folding process (2), the 3 rd hinge control mechanism 133, the 7 th

hinge control mechanism

137, and 2 hinge control mechanisms 13 receive the first voltage signal, that is, n2 is 2. And the 3 rd hinge control mechanism 133 has the first voltage signal during both folds. In this embodiment, during two adjacent folding processes, the articulated control mechanism that receives first voltage signal is not the same, guarantees the shape of buckling of folding district under the two adjacent folding states to guarantee that two adjacent folding processes of both sides adopt different bending axis to realize folding, avoided the bending zone to continuously bear the same kind of stress at two adjacent folding processes, improve and buckle the same position repeatedly many times and cause that flat back unevenness, folding part membrane material perk scheduling problem open.

Fig. 9 to 12 are simplified illustrations only, which show the state of the hinge in the foldable display module in the folded state, and do not show the display panel, and actually, the hinge can drive the display panel to fold together when the foldable display module is folded.

In one embodiment, in the unfolded state, the folding control module 14 sends a first voltage signal to all of the articulation control mechanisms 13. In this embodiment, under non-folding state, folding control module can control all articulated positions for locking the state, ensures that display module assembly is unfolding under the user state, and folding district can not buckle easily and warp, has guaranteed display module assembly's planarization, promotes user experience.

Based on the same inventive concept, the present invention further provides a display device, fig. 13 is a schematic view of the display device provided in the embodiment of the present invention, and as shown in fig. 13, the display device includes a foldable display module 100 provided in any embodiment of the present invention. The specific structure and the folding manner of the foldable display module 100 have been described in detail in the above embodiments, and are not described herein again. Of course, the display device shown in fig. 13 is only a schematic illustration, and the display device may be any electronic device with a display function, such as a mobile phone, a tablet computer, a notebook computer, an electronic book, or a television.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like made within the spirit and principle of the present invention should be included in the scope of the present invention.

Claims

1. The foldable display module is characterized by comprising:

a display panel having a folding region and a non-folding region, the folding region being located between two of the non-folding regions; the foldable display module is in a folded state, and the folding area is bent in the folded state;

a hinge located on a side facing away from the display surface of the display panel, comprising: a first member and a second member, N first members being sequentially hinged, in the N first members being sequentially hinged: the first member and the Nth first member are respectively hinged with the second member, N is a positive integer and is more than or equal to 2, the foldable display module is provided with an unfolded state, in the unfolded state, the N first members are overlapped with the folding area, and the second member is overlapped with the unfolded area;

the hinge control mechanism is used for receiving a first voltage signal and then controlling a hinge part to be in a locking state, and the two members hinged to each other cannot rotate mutually in the locking state; the hinge control mechanism is also used for controlling the hinge part to be in a free state after receiving the second voltage signal, and the two components hinged with each other can rotate mutually in the free state;

the folding control module is electrically connected with the hinge control mechanisms and used for sending the first voltage signals to N hinge control mechanisms and sending the second voltage signals to the remaining N +1-N hinge control mechanisms in one folding process, wherein N is a positive integer, and N is more than or equal to 1 and less than or equal to N + 1.

2. The foldable display module of claim 1,

the hinge control mechanism comprises an electromagnetic block set, wherein the electromagnetic block set comprises two electromagnetic blocks, and the two electromagnetic blocks are respectively arranged on two mutually hinged members.

3. The foldable display module of claim 1,

the display panel is characterized by further comprising a back glue layer, wherein the back glue layer is arranged between the display panel and the hinge in the non-folding area.

4. The foldable display module of claim 1,

the display panel comprises a substrate base plate, an array layer and a display layer which are sequentially stacked, wherein the display layer comprises a plurality of light-emitting devices, and the light-emitting devices are located on one side of the substrate base plate, are separated from the array layer, and sequentially stack an anode, a light-emitting layer and a cathode.

5. The foldable display module of any one of claims 1 to 4,

when n is more than or equal to 2, in the process of one-time folding,

the n sequentially adjacent hinge control mechanisms receive the first voltage signals; or at least m non-sequentially adjacent hinge control mechanisms receive the first voltage signal, m is a positive integer and is greater than or equal to 2 and less than or equal to n.

6. The foldable display module of any one of claims 1 to 4,

the foldable display module has a folding cycle, one folding cycle includes a plurality of non-repeating folding processes, and all of the hinge control mechanisms receive the first voltage signal an equal number of times in one folding cycle.

7. The foldable display module of claim 6,

also comprises a circulating judgment module which is used for judging the circulation of the oil,

the cycle judgment module is electrically connected with the folding control module and is used for judging whether one folding cycle is finished or not, and after one folding cycle is finished, the folding control module is controlled to enter a control mode of the next folding cycle.

8. The foldable display module of any one of claims 1 to 4,

in the first folding process, the folding control module sends the first voltage signal to N1 hinge control mechanisms, in the second folding process, the folding control module sends the first voltage signal to N2 hinge control mechanisms, the first folding process and the second folding process are adjacent two folding processes, N1 and N2 are positive integers, and N1+ N2 is more than or equal to 1 and less than or equal to N + 1; wherein the content of the first and second substances,

the n1 articulation control mechanisms do not intersect the n2 articulation control mechanisms.

9. The foldable display module of any one of claims 1 to 4,

in the first folding process, the folding control module sends the first voltage signal to N1 hinge control mechanisms, in the second folding process, the folding control module sends the first voltage signal to N2 hinge control mechanisms, the first folding process and the second folding process are adjacent two folding processes, N1 and N2 are positive integers, N1 is more than or equal to 1 and less than or equal to N +1, and N2 is more than or equal to 1 and less than N + 1; wherein the content of the first and second substances,

there are p identical said articulation control mechanisms of n1 said articulation control mechanisms and n2 said articulation control mechanisms, p being a positive integer and 1 ≦ p ≦ (n1, n2), wherein (n1, n2) indicates that the smallest number of n1 and n2 is selected.

10. The foldable display module of any one of claims 1 to 4,

in the unfolded state, the fold control module sends the first voltage signal to all of the articulation control mechanisms.

11. A display device comprising the foldable display module of any one of claims 1 to 10.