CN109036148B - Flexible display panel and flexible display device - Google Patents
Flexible display panel and flexible display device Download PDFInfo
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- CN109036148B CN109036148B CN201811099523.0A CN201811099523A CN109036148B CN 109036148 B CN109036148 B CN 109036148B CN 201811099523 A CN201811099523 A CN 201811099523A CN 109036148 B CN109036148 B CN 109036148B
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- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
- G09F9/00—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements
- G09F9/30—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements
- G09F9/301—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements flexible foldable or roll-able electronic displays, e.g. thin LCD, OLED
Abstract
The invention discloses a flexible display panel and a flexible display device, comprising: a flexible display screen; the supporting layer is positioned on one side of the flexible display screen, which is back to the light-emitting surface; the elastic device is positioned between the supporting layer and the flexible display screen, is in contact with the supporting layer and can elastically deform in a direction perpendicular to the flexible display screen; an actuator located between the elastic device and the flexible display screen; wherein the actuator comprises a first state in which the actuator is in contact with the resilient means and the flexible display respectively, the actuator locally deforming the flexible display by deformation. The user can produce corresponding resilience stimulation when pressing the position that warp in the flexible display screen, further improves user's use experience.
Description
Technical Field
The present invention relates to the field of display technologies, and in particular, to a flexible display panel and a flexible display device.
Background
With the development and progress of science and technology, intelligent terminals are also continuously innovated. Currently, intelligent terminals have been widely used in work, study, and cattle activities of people due to their versatility and portability. The keys are used as instruction and data input equipment of the intelligent terminal and can send commands, input data and the like to the computer. Since the development, with the continuous progress and innovation of the market and the use demand of users, in order to reduce the thickness and the weight of the intelligent terminal, the virtual key gradually replaces the physical key. However, the virtual key cannot provide the hand feeling when the user uses the physical key, and the user does not have a real touch feeling and a poor use experience effect.
Therefore, a flexible display panel and a flexible display device are needed to be provided, which can not only keep the physical hand feeling of the user when pressing the key, but also avoid increasing the thickness and weight of the intelligent terminal, and provide a more optimized use experience for the user.
Disclosure of Invention
In view of the foregoing, the present invention provides a flexible display panel and a flexible display device.
An embodiment of the present invention provides a flexible display panel, including: a flexible display screen; the supporting layer is positioned on one side of the flexible display screen, which is back to the light-emitting surface; the elastic device is positioned between the supporting layer and the flexible display screen, is in contact with the supporting layer and can elastically deform in a direction perpendicular to the flexible display screen; an actuator located between the elastic device and the flexible display screen; wherein the actuator comprises a first state in which the actuator is in contact with the resilient means and the flexible display respectively, the actuator locally deforming the flexible display by deformation.
The embodiment of the invention also provides a flexible display device which comprises the flexible display panel provided by the invention.
Compared with the prior art, the flexible display panel and the flexible display device provided by the invention at least realize the following beneficial effects:
elastic device can follow the direction elastic deformation of perpendicular to flexible display screen to when the user is pressing the position of deformation in the flexible display screen, the elastic device who is located between supporting layer and the actuator can produce corresponding resilience force, and after through actuator and flexible display screen, resilience force can make the user produce corresponding resilience amazing, further improves user's use and experiences. Set up resilient means between supporting layer and actuator, the user can produce corresponding resilience stimulus when pressing the position that warp in the flexible display screen, further improves user's use experience.
Of course, it is not necessary for any product in which the present invention is practiced to achieve all of the above-described technical effects simultaneously.
Other features of the present invention and advantages thereof will become apparent from the following detailed description of exemplary embodiments thereof, which proceeds with reference to the accompanying drawings.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description, serve to explain the principles of the invention.
Fig. 1 is a schematic partial structural diagram of a flexible display screen according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of a flexible display panel according to an embodiment of the present invention;
fig. 3 is a schematic structural diagram of another flexible display panel provided in an embodiment of the present invention;
fig. 4 is a schematic structural diagram of another flexible display panel provided in an embodiment of the present invention;
fig. 5 is a schematic structural diagram of another flexible display panel according to an embodiment of the present invention;
fig. 6 is a schematic structural diagram of another flexible display panel according to an embodiment of the present invention;
fig. 7 is a schematic plan view of a flexible display panel according to another embodiment of the present invention;
FIG. 8 is a cross-sectional view of the flexible display panel of FIG. 7 taken along line C-C';
fig. 9 is a schematic plan view of a flexible display panel according to another embodiment of the present invention;
fig. 10 is a schematic plan view of a flexible display panel according to another embodiment of the present invention;
FIG. 11 is a cross-sectional view of the flexible display panel of FIG. 10 taken along D-D';
FIG. 12 is an enlarged view of section E of FIG. 11;
fig. 13 is a cross-sectional view of the flexible display panel of fig. 10 taken along F-F';
fig. 14 is a schematic structural diagram of another flexible display panel according to an embodiment of the present invention;
fig. 15 is a schematic structural diagram of a display device according to an embodiment of the present invention.
Detailed Description
Various exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings. It should be noted that: the relative arrangement of the components and steps, the numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present invention unless specifically stated otherwise.
The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses.
Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail but are intended to be part of the specification where appropriate.
In all examples shown and discussed herein, any particular value should be construed as merely illustrative, and not limiting. Thus, other examples of the exemplary embodiments may have different values.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, further discussion thereof is not required in subsequent figures.
As shown in fig. 1 and fig. 2, fig. 1 is a schematic partial structure diagram of a flexible display screen according to an embodiment of the present invention, fig. 2 is a schematic structural diagram of a flexible display panel according to an embodiment of the present invention, and an embodiment of the present invention provides a flexible display panel, including: a flexible display screen 10; in particular, the flexible display panel 10 includes a flexible substrate 1, and the flexible substrate 1 is made of any suitable insulating material having flexibility, and may be transparent, translucent, or opaque. The flexible substrate 1 is provided with an array layer 2, a light-emitting functional layer 3 above the array layer 2, and a thin film packaging layer 4 on the light-emitting functional layer 3. The array layer 2 includes a plurality of thin film transistors 5, the light emitting functional layer 3 includes a plurality of organic light emitting devices 6, and the thin film encapsulation layer 4 typically includes a plurality of inorganic layers and organic layers, which are alternately stacked. Of course, the present invention may also include other film layers in the prior art, which are not described in detail in this specification.
The flexible display panel further includes: the supporting layer 20 is positioned on one side of the flexible display screen 10 back to the light-emitting surface;
the elastic device 30, the elastic device 30 is located between the support layer 20 and the flexible display screen 10, the elastic device 30 is in contact with the support layer 20 and can be elastically deformed in a direction perpendicular to the flexible display screen 10;
an actuator 40, the actuator 40 being located between the elastic means 30 and the flexible display screen 10;
wherein the actuator 40 comprises a first state in which the actuator 40 is in contact with the elastic means 30 and the flexible display 10, respectively, the actuator 40 locally deforming the flexible display 10 by deformation.
In particular, with continued reference to fig. 2, the resilient means 30 and the actuator 40 are located between the support layer 20 and the flexible display 10, and the actuator 40 is in a first state, i.e. the actuator 40 deforms the flexible display 10 locally, in particular, the actuator 40 deforms the flexible display 10 at a position in contact with the actuator 40. In order to reduce the number of physical keys, virtual keys are often used in the display panel. When the display device does not detect the touch operation, the icons of the virtual keys are not displayed in the flexible display screen 10, and when the display device detects the touch operation, the icons of the corresponding virtual keys are displayed in the flexible display screen 10 according to an instruction formed by touch. Optionally, the local deformation may be deformation of an area inside the virtual key. Meanwhile, before the user operates the virtual keys, the actuator 40 deforms the portions of the flexible display screen 10 corresponding to the virtual keys through deformation in the first state, so that the user has the same feeling as when pressing the physical keys when pressing the virtual keys, and the use experience of the user is improved.
The elastic device elastically deforms along the direction perpendicular to the flexible display screen under the action of external force, when the elastic device does not deform, the elastic device cannot be compressed, the contact position of the flexible display screen and the flexible display screen is deformed, and deformation is maintained, namely, the flexible display panel is maintained even when touch operation is not needed, the effect of a display picture of the display panel is reduced, and the protrusion is easily scratched and damaged by a hard object in an external environment. Through the display device that this embodiment provided, the entity that can remain the user when pressing the button is felt, can avoid increasing intelligent terminal's thickness and weight again, still can provide a more optimized use for the user and experience, for example, when the user need not implement the touch-control function, the resilient means does not take place deformation, and the actuator also does not take place deformation to display panel's display surface can be in flat state, and the display effect is best, improves user experience.
Furthermore, when the user presses the deformed portion of the flexible display 10, in order to avoid the deformed portion of the flexible display 10 from being damaged during the pressing, the deformed portion of the flexible display 10 needs to return to the flat state, which is usually accomplished by controlling the actuator 40 to cancel the deformation, and there is a delay in canceling the deformation by the actuator 40. The elastic device 30 can elastically deform in a direction perpendicular to the flexible display screen 10, so that when a user presses a deformed part of the flexible display screen 10, the deformed part of the flexible display screen 10 can be directly restored to a flat state through the elastic device 30, and a delay problem existing when the deformed part of the flexible display screen 10 is restored to the flat state when the deformed part of the flexible display screen 10 is pressed is effectively solved. Moreover, the problem that the deformation state of the actuator 40 is not changed in time for multi-time and high-frequency click touch operation is effectively solved, and the use experience of a user is further improved. Moreover, the change of the state of the actuator needs to be controlled by a signal, which on the one hand is delayed and on the other hand increases the power consumption.
And the elastic device 30 between the support layer 20 and the actuator 40 generates a corresponding resilience force, and after the resilience force passes through the actuator 40 and the flexible display screen 10, the resilience force can enable the user to generate a corresponding resilience stimulus, thereby further improving the use experience of the user.
In the prior art, after receiving an operation that a user presses a deformed part in a flexible display screen, a display panel generates a rebounding stimulus to the user through an actuator, and a certain delay is generated between the time when the user presses the flexible display screen and the time when the user receives the rebounding stimulus. Compared with the prior art, the resilient device 30 is arranged between the support layer 20 and the actuator 40, so that a user can generate corresponding resilient stimulation while pressing the deformed part of the flexible display screen 10, and the use experience of the user is further improved.
Fig. 3 is a schematic structural diagram of another flexible display panel provided in an embodiment of the present invention, and referring to fig. 3, optionally, the actuator 40 further includes a second state, in which the actuator 40 does not deform the flexible display 10.
Specifically, with continued reference to fig. 3, when no key is displayed on the flexible display 10, the actuator 40 is in the second state, i.e., the actuator 40 does not deform the flexible display 10, and the surface of the flexible display 10 is in a flat state.
It should be noted that the deformation of the flexible display screen is the deformation of the flexible display screen of the display panel by the actuator, and is not realized by the user performing touch operation (touch or press), and the installation position of the actuator on the display panel is not specifically limited in this embodiment, and only the function of the flexible display screen capable of actively deforming needs to be realized, which is not described herein again.
It should be noted that the surface of the flexible display screen 10 is flat and is not limited to the display panel being completely flat, and alternatively, the area corresponding to the covering actuator in the flexible display screen 10 is flat. Alternatively, the display panel may include two or more regions, in which the actuator in one region is in the second state and the actuator in the other region is in the first state.
Alternatively, the actuator may be one or more of an electroactive polymer, a piezoelectric element, a shape memory alloy, a fluid, a MEMS element.
For example, when the actuator is a piezoelectric element, the actuator includes a piezoelectric sheet disposed below the flexible display panel, and in the first state, the piezoelectric sheet is deformed by energization, and the flexible display panel is locally deformed by the deformation of the piezoelectric sheet.
For another example, the actuator may include a fluid, and specifically, the actuator includes a cavity disposed below the flexible display screen, the cavity is made of an elastic material or a flexible material, the cavity includes a channel communicating with the outside, and in the first state, the channel fills the cavity with a filling fluid, so that a surface of the cavity contacting the flexible display screen is raised toward the flexible display screen, thereby locally deforming the flexible display screen, where the fluid may be a liquid or a gas.
Fig. 4 is a schematic structural diagram of another flexible display panel provided in an embodiment of the present invention, and referring to fig. 4, optionally, the display panel further includes a touch detection unit 50, the touch detection unit 50 detects a touch position, and the actuator 40 at the touch position locally deforms the flexible display screen 10 by deformation.
Specifically, with reference to fig. 4, the touch detection unit 50 is configured to detect a touch position of a user, form a virtual key at the touch position, and deform the actuator 40 at the touch position to locally deform the flexible display screen 10, so that only when the user performs a touch operation, an area corresponding to the touch position in the flexible display screen 10 deforms, it is not necessary to deform areas corresponding to all virtual keys in the flexible display screen 10, thereby avoiding deformation of more areas in the flexible display screen 10 at the same time, and when the user does not perform the touch operation, the flexible display screen 10 does not deform, thereby reducing an influence on a display effect of the flexible display screen 10.
Fig. 5 is a schematic structural diagram of another flexible display panel according to an embodiment of the present invention, referring to fig. 5, optionally, wherein the touch detection unit 50 is a position sensor 51 or/and a pressure sensor 52.
It should be noted that the touch detection unit is configured to detect a touch position of a user, and the touch detection unit is further configured to detect a user input, so as to determine input information. The touch detection unit may be a position sensor and/or a pressure sensor, where the position sensor is used to detect a touch position of a user in the flexible display screen, and the position sensor may be, for example, a self-capacitance type touch detection manner, a mutual capacitance type touch detection manner, or a resistance type touch detection manner. The touch detection unit may also be another sensor, which is not limited in the embodiments of the present invention.
Fig. 6 is a schematic structural diagram of another flexible display panel provided by an embodiment of the present invention, referring to fig. 6, and optionally, the supporting layer 20 includes a groove 21 opened toward one side of the flexible display screen 10, and the elastic device 30 is located in the groove 21.
In particular, with continued reference to fig. 6, the supporting layer 20 includes a groove 21 opening to a side of the flexible display screen 10, the elastic device 30 is located in the groove 21, and the groove 21 is used for limiting the elastic deformation direction of the elastic device 30 to be a direction perpendicular to the flexible display panel. The elastic deformation of the elastic means 30 causes the movement of the actuator 40 such that the overall direction of movement of the actuator 40 is the same as the direction of elastic deformation of the elastic means 30, and the perpendicular projection of the actuator 40 on the supporting layer 20 is located in the area of the corresponding recess 21 in the supporting layer 20, i.e. the actuator 40 may be at least partially located in the recess 21 when pressed. Meanwhile, the elastic device 30 is positioned in the groove 21, so that the thickness of the flexible display panel is effectively reduced. The direction of deformation of the elastic means 30 can further be defined by the groove 21.
It should be noted that, the embodiment of the present invention does not limit the number relationship between the grooves and the elastic devices, and one elastic device may be disposed in one groove, or a plurality of elastic devices may be disposed in one groove; the embodiment of the present invention also does not limit the number relationship between the elastic devices and the actuators, and the number between the elastic devices and the actuators may be the same, or one elastic device may correspond to multiple actuators, or one actuator may correspond to multiple elastic devices; the embodiment of the invention also does not limit the number relationship between the actuators and the virtual keys, the actuators and the virtual keys can be in one-to-one correspondence, or one virtual key can be in correspondence with a plurality of actuators, illustratively, for a virtual key with a larger area, a plurality of actuators are in correspondence, so that the patterns deformed in the area corresponding to the virtual key in the flexible display screen are matched with the patterns of the virtual key as much as possible, and the actuators are arranged in an array in the vertical projection of the virtual key in the plane of the flexible display panel.
Fig. 7 is a schematic plane structure diagram of another flexible display panel according to an embodiment of the present invention, and fig. 8 is a cross-sectional view of the flexible display panel along C-C' in fig. 7, referring to fig. 7 and fig. 8, optionally, wherein the flexible display panel is divided into a display area AA and a non-display area NA surrounding the display area AA, the display area AA includes a plurality of function keys B, and a vertical projection of the actuator 40 in a plane of the flexible display panel is located within a vertical projection of the function keys B in the plane of the flexible display panel. When the flexible display panel does not detect the touch operation, the icons of the function keys B are not displayed in the flexible display screen 10, when the flexible display panel detects the touch operation, the corresponding icons of the function keys B are displayed in the flexible display screen 10 according to an instruction formed by touch, and when a user touches the icons of the function keys B, the flexible display panel has corresponding functions to respond to the touch of the user.
Specifically, with continuing reference to fig. 7 and 8, the display area AA includes a plurality of function keys B, and a vertical projection of the actuator 40 in the plane of the flexible display panel is located within a vertical projection of the function keys B in the plane of the flexible display panel, so that the actuator 40 deforms, in the first state, a portion of the flexible display screen 10 corresponding to the function keys B through deformation, and the function keys B may be virtual keys.
It should be noted that the combination of the plurality of function keys included in the display area may be a standard 26-letter keyboard, and may also be a nine-grid input method keyboard, and the embodiment of the present invention is not limited by this. And the plurality of function keys can be distributed in a local area in the display area of the flexible display panel, and the plurality of function keys can also be distributed in the whole display area of the flexible display panel.
Fig. 9 is a schematic plan view illustrating a flexible display panel according to another embodiment of the present invention, and referring to fig. 9, the flexible display panel further includes a bending axis 60;
the bending axis 60 divides the display area AA into a first display area AA1 and a second display area AA2, and the actuator (not shown in fig. 9) is located within the first display area AA 1.
Specifically, with reference to fig. 9, the flexible display panel further includes a bending shaft 60, the flexible display panel can be bent by the bending shaft 60, the bending shaft 60 divides the display area AA into a first display area AA1 and a second display area AA2, the virtual key can be disposed in the first display area AA1, and the actuator deforms to locally deform the flexible display screen located in the first display area AA1 in the first state.
It should be noted that, in the embodiment of the present invention, the actuator is not limited to be located in the first display area, the actuator may also be located in the second display area, and in other embodiments, the flexible display panel may further include a plurality of bending axes, the bending axes may divide the display area into at least three areas, and the actuator may be located in any one or more areas of the display area.
Fig. 10 is a schematic plan view illustrating a flexible display panel according to another embodiment of the present invention, and fig. 11 is a cross-sectional view of the flexible display panel shown in fig. 10 taken along D-D', and referring to fig. 10 and fig. 11, alternatively, the actuator 40 is an electromagnetic actuator 40a, the electromagnetic actuator 40a includes a piston 41 and a coil 42, the coil 42 surrounds the piston 41, the piston 41 moves in a direction perpendicular to the supporting layer 20, and in the first state, the actuator 40 partially deforms the flexible display panel 10 through the piston 41.
Specifically, with continued reference to fig. 10 and 11, the actuator 40 is an electromagnetic actuator 40a, the piston 41 in the electromagnetic actuator 40a may be made of a magnetic material, the coil 42 may be a metal material, the coil 42 in the electromagnetic actuator 40a is energized, the coil 42 generates a magnetic field, so as to generate a magnetic force on the piston 41, so that the piston 41 moves in a direction perpendicular to the supporting layer 20, and in the first state, the electromagnetic actuator 40a partially deforms the flexible display screen 10 through the piston 41.
It should be noted that the embodiment of the present invention is not limited to the actuator being an electromagnetic actuator, and the actuator may be any one of an electroactive polymer, a piezoelectric element, a shape memory alloy, and a microelectrode system element, and may be other types of actuators known to those skilled in the art to achieve the same effect, and the embodiment is not limited in particular herein.
With continued reference to fig. 11, optionally, the resilient means 30 is a spring 31.
Specifically, the spring 31 can elastically deform in a direction perpendicular to the flexible display screen 10, so that when a user presses a deformed portion of the flexible display screen 10, the spring 31 located between the support layer 20 and the actuator 40 generates a corresponding resilience force, and after passing through the actuator 40 and the flexible display screen 10, the resilience force can enable the user to generate a corresponding resilience stimulus, thereby further improving the user experience.
For example, when the actuator 40 is used to fit in a virtual keyboard in a flexible display panel, the spring 31 will generate a resilient force when a user presses a deformed portion of the flexible display screen 10, so that the user can feel close to using a mechanical keyboard, and the use experience of the user is further improved.
With continued reference to fig. 11, optionally, wherein the electromagnetic actuator 40a further comprises a housing 43, the housing 43 comprises a base plate 44, the base plate 44 being located between the resilient means 30 and the coil 42.
Specifically, the electromagnetic actuator 40a further includes a housing 43, the housing 43 includes a bottom plate 44 located between the elastic device 30 and the coil 42, the elastic device 30 can be elastically deformed in a direction perpendicular to the flexible display screen 10, and the housing 43 drives the entire electromagnetic actuator 40a to move in the direction perpendicular to the flexible display screen 10 through the bottom plate 44 contacting with the elastic device 30.
With continued reference to fig. 11, optionally, the flexible display panel further comprises a spacing layer 70 located between the support layer 20 and the flexible display screen 10;
the limiting layer 70 comprises a plurality of first hollow-out parts 71, and the first hollow-out parts 71 penetrate through the limiting layer 70 along a direction perpendicular to the flexible display panel;
the projection of the actuator 40 on the plane perpendicular to the flexible display panel is located in the first hollow portion 71, and the first hollow portion 71 provides a path for the movement of the actuator 40 and defines the movement direction of the actuator 40.
Specifically, the projection of the first hollow-out portion 71 and the groove 21 on the plane perpendicular to the flexible display panel is at least partially overlapped, and the projection of the actuator 40 on the plane perpendicular to the flexible display panel is located in the projection of the first hollow-out portion 71 and the groove 21 on the plane perpendicular to the flexible display panel, so that the actuator 40 can move in the first hollow-out portion 71 and the groove 21, and the first hollow-out portion 71 and the groove 21 limit the moving direction of the actuator 40 to be approximately perpendicular to the flexible display panel. Further, the projections of the actuator 40, the first hollow-out portion 71 and the groove 21 in the plane perpendicular to the flexible display panel completely coincide, and the first hollow-out portion 71 and the groove 21 further define the moving direction of the actuator 40, so that the deviation between the moving direction of the actuator 40 and the preset direction is avoided.
The parts of the supporting layer 20 except the groove 21 are in contact with the parts of the limiting layer 70 except the first hollow-out part 71, and the limiting layer 70 is located between the supporting layer 20 and the flexible display screen 10, so that the limiting layer 70 has a supporting effect on the supporting layer 20 and the flexible display screen 10, and the damage of each film layer of the flexible display panel except the area provided with the actuator 40 under the action of external force is effectively reduced.
Fig. 12 is an enlarged view of a portion E of fig. 11, and referring to fig. 11 and 12, the flexible display panel further includes a stopper plate 80 between the flexible display screen 10 and the stopper layer 70;
the limiting plate 80 comprises a plurality of second hollow parts 81, at least part of the limiting plate 80 is overlapped with the first hollow parts 71, and the projection of the second hollow parts 81 on the plane perpendicular to the flexible display panel is positioned in the first hollow parts 71;
the piston 41 comprises a base 45 and a protruding part 46 which are connected, and the protruding part 46 is arranged on one side of the base 45 close to the flexible display screen 10; the projection of the protrusion portion 46 on the plane perpendicular to the flexible display panel is located in the second hollow portion 81.
Specifically, with continued reference to fig. 11 and 12, a position-limiting plate 80 is disposed between the flexible display screen 10 and the position-limiting layer 70, the position-limiting plate 80 at least partially overlaps the first hollow portion 71, and the position-limiting plate 80 limits the casing 43 in the electromagnetic actuator 40a to move only in the first hollow portion 71 and the groove 21, so as to avoid deformation of the flexible display screen 10 out of the control range caused by the movement of the casing 43 and the coil 42. The position limiting plate 80 includes a plurality of second hollow portions 81, the projection of the protrusion 46 on the plane perpendicular to the flexible display panel is located in the second hollow portions 81, and the second hollow portions 81 can limit the moving direction of the protrusion 46 in the piston 41. In the first state, the actuator 40 locally deforms the flexible display 10 via the protrusion 46 in the piston 41.
The length of the base 45 in the first direction X is L1, the length of the protrusion 46 in the first direction X is L2, and the length of the second hollow portion 81 in the first direction X is L3, where the first direction X is parallel to the flexible display panel; wherein the content of the first and second substances,
0＜L2≤L3＜L1。
specifically, when 0 < L2 < L3 < L1, the base 45 cannot pass through the position-limiting plate 80, so that it can only move in the coil 42 between the position-limiting plate 80 and the bottom plate 44, and the piston 41 is prevented from being entirely separated from the control of the coil 42, and the actuator 40 partially deforms the flexible display screen 10 by passing the protrusion 46 through the second hollow 81. When L2 is equal to L3, the moving direction of the protrusion 46 in the actuator 40 is further limited, and the deviation between the actually deformed area and the preset deformed area in the flexible display screen 10 is avoided.
Optionally, the housing 43 further includes a top plate 47, the top plate 47 is located between the coil 42 and the flexible display screen 10, the top plate 47 includes a plurality of through holes 48 penetrating through the top plate 47 along a direction perpendicular to the flexible display panel, a projection of the through holes 48 on a plane perpendicular to the flexible display panel is located in the first hollow portion 71, the through holes 48 and the second hollow portion 81 have the same function, the electromagnetic actuator 40a is limited that the housing 43 can only move in the first hollow portion 71 and the groove 21, and deformation of an area outside a virtual key in the flexible display screen 10 due to a change of a moving path of the housing 43 and the coil 42 is avoided. Meanwhile, the moving direction of the protrusion 46 in the piston 41 can be limited, and the situation that the piston 41 is separated from the electromagnetic actuator 40a when the electromagnetic actuator 40a moves in the first hollow-out portion 71, which causes the field (magnetic field) between the piston 41 and the coil 42 to be damaged, can be avoided.
Optionally, the housing further comprises a side wall (not shown) connected between the bottom plate and the top plate, the housing forming a cavity through the bottom plate, the top plate and the side wall for accommodating the coil and the piston.
In other embodiments of the present invention, the flexible display panel may not have the position-limiting plate 80, and the top plate 47 is disposed in the housing 43, so as to effectively reduce the thickness of the flexible display panel.
Fig. 13 is a cross-sectional view of the flexible display panel of fig. 10 taken along F-F', and referring to fig. 13, optionally, wherein the electromagnetic actuator 40a includes a first electromagnetic actuator 40b and a second electromagnetic actuator 40c, a length of the protrusion 46a of the first electromagnetic actuator 40b in the direction perpendicular to the flexible display panel is d1, and a length of the protrusion 46b of the second electromagnetic actuator 40c in the direction perpendicular to the flexible display panel is d 2; wherein the content of the first and second substances,
d1＞d2＞0。
specifically, with continued reference to fig. 13, the electromagnetic actuator 40a includes a first electromagnetic actuator 40b and a second electromagnetic actuator 40c, wherein a length of the protrusion 46a of the first electromagnetic actuator 40b in the direction perpendicular to the flexible display panel is greater than a length of the protrusion 46b of the second electromagnetic actuator 40c in the direction perpendicular to the flexible display panel, and in the first state, the first electromagnetic actuator 40b may make a deformation height of a corresponding portion of the flexible display 10 by the protrusion 46a greater than a deformation height of a corresponding portion of the flexible display 10 by the second electromagnetic actuator 40c by the protrusion 46b, the deformation height being a maximum length of a deformed portion and an undeformed portion of the flexible display 10 in the direction perpendicular to the flexible display panel.
In the first state, the user gets different haptic feedback when touching the flexible display screen by the first and second electromagnetic actuators 40b and 40 c. For example, the electromagnetic actuator 40a in the embodiment of the present invention may be matched in a virtual keyboard in a flexible display panel, the first electromagnetic actuator 40b is used to match an F key and a J key in the virtual keyboard, and the second electromagnetic actuator 40c is used to match other keys in the virtual keyboard except the F key and the J key, so that a user may further get a feeling of being close to using a physical keyboard when using the virtual keyboard, and the use experience of the user may be improved. It is understood that the embodiment of the present invention merely illustrates that the electromagnetic actuator may be matched to a virtual keyboard in a flexible display panel, the electromagnetic actuator may also be used in other keys in the display panel or other portions that need to provide haptic feedback, and the electromagnetic actuator may also include other electromagnetic actuators having different structures from the first electromagnetic actuator and the second electromagnetic actuator, and other arrangements may also be adopted between the first electromagnetic actuator and the second electromagnetic actuator, and the embodiment of the present invention is not limited in particular.
Furthermore, the first electromagnetic actuator is used for matching the virtual key with larger occupied area in the flexible display panel, and the second electromagnetic actuator is used for matching the virtual key with smaller occupied area in the flexible display panel. The larger the deformation height of the deformed part in the flexible display screen is, the larger the area of the corresponding flexible display screen where the deformation occurs is, so that the area of the deformed area in the flexible display screen is larger due to the deformation of the first electromagnetic actuator, the virtual key with the larger area occupied in the flexible display panel is matched, the use experience of a user is further improved, and the user can recognize different function keys through touch.
Fig. 14 is a schematic structural diagram of another flexible display panel provided by the embodiment of the invention, referring to fig. 11 and fig. 14, and optionally, in the first state, the coil 42 generates a first acting force F1 on the piston 41 in a direction perpendicular to the supporting layer, the spring 31 has an elastic force F2 on the electromagnetic actuator 40a, the directions of the first acting force F1 and the elastic force F2 are the same, and the first acting force F1 is greater than the elastic force F2.
Specifically, since the first force F1 is much greater than the spring force F2, when the user presses the deformed portion of the flexible display screen 10, the pressing causes the spring 31 to be compressed, and the positional relationship between the coil 42 and the piston 41 in the actuator 40 remains unchanged.
Specifically, the positional relationship between the coil 42 and the piston 41 in the actuator 40 is kept unchanged, and the deformed portion of the flexible display panel 10 returns to the flat state by the compression of the spring 31, thereby effectively alleviating the delay problem that occurs when the deformed portion of the flexible display panel 10 returns to the flat state when the deformed portion of the flexible display panel 10 is pressed. Moreover, the problem that the deformation state of the actuator 40 is not changed in time for multi-time and high-frequency click touch operation is effectively solved, and the use experience of a user is further improved. Meanwhile, the actuator is prevented from deforming back and forth, the service life is shortened, and the power consumption can be reduced.
It should be noted that, in order to obtain larger deformation of a portion of the flexible display screen 10 that needs to be deformed in other embodiments of the present invention, a plurality of actuator layers may be used in a stacked manner, and different types of actuators may be used, for example, the first actuator and the second actuator are arranged in a direction perpendicular to the flexible display panel, and the second actuator is located between the first actuator and the flexible display screen, where deformation of the first actuator causes the second actuator to move in a direction perpendicular to the flexible display panel, and deformation of the second actuator causes the flexible display screen to be locally deformed, and deformation of a corresponding portion of the flexible display screen is an effect of stacking deformation of the first actuator and deformation of the second actuator, which can further improve a deformation effect of the flexible display screen, and the present invention is not described in detail herein.
An embodiment of the present invention provides a flexible display device, including the flexible display panel 100 as described above.
Referring to fig. 15, fig. 15 is a schematic structural diagram of a display device according to an embodiment of the present invention. Fig. 15 provides a display device 1000 including the display panel 100 according to any of the above embodiments of the present invention. The embodiment of fig. 15 is only an example of a mobile phone, and the display device 1000 is described, it is understood that the display device 100 provided in the embodiment of the present invention may be other display devices having a display function, such as a computer, a television, and a vehicle-mounted display device, and the present invention is not limited thereto. The display device provided in the embodiment of the present invention has the beneficial effects of the display panel provided in the embodiment of the present invention, and specific reference may be made to the specific description of the display panel in each of the above embodiments, which is not repeated herein.
By the embodiment, the flexible display panel and the flexible display device provided by the invention at least realize the following beneficial effects:
elastic device can follow the direction elastic deformation of perpendicular to flexible display screen to when the user is pressing the position of deformation in the flexible display screen, the elastic device who is located between supporting layer and the actuator can produce corresponding resilience force, and after through actuator and flexible display screen, resilience force can make the user produce corresponding resilience amazing, further improves user's use and experiences. Set up resilient means between supporting layer and actuator, the user can produce corresponding resilience stimulus when pressing the position that warp in the flexible display screen, further improves user's use experience.
Although some specific embodiments of the present invention have been described in detail by way of examples, it should be understood by those skilled in the art that the above examples are for illustrative purposes only and are not intended to limit the scope of the present invention. It will be appreciated by those skilled in the art that modifications may be made to the above embodiments without departing from the scope and spirit of the invention. The scope of the invention is defined by the appended claims.
Claims (13)
1. A flexible display panel, comprising:
a flexible display screen;
the supporting layer is positioned on one side of the flexible display screen, which is back to the light-emitting surface;
the elastic device is positioned between the supporting layer and the flexible display screen, is in contact with the supporting layer and can elastically deform in a direction perpendicular to the flexible display screen;
an actuator located between the resilient device and the flexible display screen; wherein the actuator comprises a first state in which the actuator is in contact with the resilient means and the flexible display screen, respectively, the actuator locally deforming the flexible display screen by deformation; the actuator is an electromagnetic actuator comprising a piston;
the flexible display panel further comprises a limiting layer positioned between the supporting layer and the flexible display screen; the limiting layer comprises a plurality of first hollow parts, and the first hollow parts penetrate through the limiting layer along the direction perpendicular to the flexible display panel; the projection of the actuator on the plane perpendicular to the flexible display panel is positioned in the first hollow-out part, the first hollow-out part provides a path for the movement of the actuator, and the first hollow-out part limits the movement direction of the actuator;
the flexible display panel further comprises a limiting plate positioned between the flexible display screen and the limiting layer; the limiting plate comprises a plurality of second hollow parts, at least part of the limiting plate is overlapped with the first hollow parts, and the projection of the second hollow parts on the plane perpendicular to the flexible display panel is positioned in the first hollow parts; the piston comprises a base and a protruding part which are connected, and the protruding part is arranged on one side of the base, which is close to the flexible display screen; the projection of the protrusion part on the plane perpendicular to the flexible display panel is positioned in the second hollow part; the length of the base in a first direction is L1, the length of the protrusion in the first direction is L2, and the length of the second hollow part in the first direction is L3, wherein the first direction is parallel to the flexible display panel; wherein, L3 is more than L1 and more than L2 is more than 0 and less than or equal to L3.
2. The flexible display panel of claim 1,
the actuator further includes a second state in which the actuator does not deform the flexible display.
3. The flexible display panel according to claim 1, further comprising a touch detection unit that detects a touch position at which the actuator locally deforms the flexible display screen by deforming.
4. The flexible display panel of claim 1,
the supporting layer comprises a groove with an opening facing one side of the flexible display screen, and the elastic device is positioned in the groove.
5. The flexible display panel of claim 1,
the flexible display panel is divided into a display area and a non-display area surrounding the display area, the display area comprises a plurality of function keys, and the vertical projection of the actuator in the plane of the flexible display panel is positioned in the vertical projection of the function keys in the plane of the flexible display panel.
6. The flexible display panel of claim 5, further comprising a bending axis;
the bending shaft divides the display area into a first display area and a second display area, and the actuator is located in the first display area.
7. The flexible display panel of claim 1,
the electromagnetic actuator further comprises a coil surrounding the piston, the piston being movable in a direction perpendicular to the supporting layer, in the first state the actuator locally deforming the flexible display screen by the piston.
8. The flexible display panel of claim 7,
the electromagnetic actuator further comprises a housing comprising a base plate located between the resilient means and the coil.
9. The flexible display panel of claim 8,
the electromagnetic actuator includes a first electromagnetic actuator in which a length of the protrusion in a direction perpendicular to the flexible display panel is d1, and a second electromagnetic actuator in which a length of the protrusion in a direction perpendicular to the flexible display panel is d 2; wherein the content of the first and second substances,
d1＞d2＞0。
10. the flexible display panel of claim 7,
the elastic device is a spring.
11. The flexible display panel of claim 10,
in the first state, the coil generates a first acting force on the piston in a direction perpendicular to the supporting layer, the spring has an elastic force on the electromagnetic actuator, the first acting force and the elastic force have the same direction, and the first acting force is larger than the elastic force.
12. The flexible display panel of claim 3,
the touch detection unit is a position sensor or/and a pressure sensor.
13. A flexible display device comprising the flexible display panel according to any one of claims 1 to 12.
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| CN109817098B (en) * | 2019-02-11 | 2021-03-16 | 京东方科技集团股份有限公司 | Display panel, preparation method of display panel and display device |
| CN110085640A (en) * | 2019-04-24 | 2019-08-02 | 武汉华星光电半导体显示技术有限公司 | Flexible display panels and display device |
| US10985335B2 (en) | 2019-04-24 | 2021-04-20 | Wuhan China Star Optoelectronics Semiconductor Display Technology Co., Ltd. | Flexible display panel and display device |
| CN110187742A (en) * | 2019-05-13 | 2019-08-30 | 昆山国显光电有限公司 | Display module and display terminal |
| CN111768704B (en) * | 2019-07-24 | 2022-03-01 | 友达光电股份有限公司 | Flexible display module |
| CN111443822B (en) * | 2020-03-13 | 2023-12-22 | 维沃移动通信有限公司 | Electronic device, control method thereof, and medium |
| KR20210135141A (en) * | 2020-05-04 | 2021-11-12 | 주식회사 엘지에너지솔루션 | Battery Module Equipped With A Fire Extinguishing Unit |
| CN111735590B (en) * | 2020-06-30 | 2022-05-31 | 联想(北京)有限公司 | Detection device |
| CN111751089B (en) * | 2020-06-30 | 2022-05-31 | 联想(北京)有限公司 | Detection device and detection method |
| WO2023159442A1 (en) * | 2022-02-24 | 2023-08-31 | 京东方科技集团股份有限公司 | Virtual tactile module and virtual tactile system |
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| CN100359450C (en) * | 2005-04-08 | 2008-01-02 | 义隆电子股份有限公司 | Touch pad capable of inducing switch button sense |
| KR101067587B1 (en) * | 2010-01-29 | 2011-09-27 | 주식회사 팬택 | Flexible terminal with shape conversion characteristics, shape conversion method and shape conversion device |
| CN104731308B (en) * | 2013-12-20 | 2019-01-15 | 联想(北京)有限公司 | A kind of accessory device and a kind of electronic equipment |
| KR102181236B1 (en) * | 2014-04-18 | 2020-11-23 | 삼성디스플레이 주식회사 | Display apparatus and method of controlling display apparatus |
| CN104702755A (en) * | 2015-03-24 | 2015-06-10 | 黄小曼 | Virtual mobile phone touch screen device and method |
| CN205281988U (en) * | 2015-12-30 | 2016-06-01 | 北京维信诺光电技术有限公司 | Flexible display device |
| CN206546553U (en) * | 2016-12-28 | 2017-10-10 | 重庆墨希科技有限公司 | Electric actuation tactile feedback keyboard |
| CN106484129A (en) * | 2016-12-28 | 2017-03-08 | 重庆墨希科技有限公司 | Electric actuation tactile feedback keyboard |
| CN106843615B (en) * | 2017-01-03 | 2019-10-01 | 京东方科技集团股份有限公司 | A kind of display screen and display system |
| CN108417427A (en) * | 2018-05-16 | 2018-08-17 | 珠海市智迪科技股份有限公司 | A kind of key board unit of film mechanical switch |
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