CN110211504B - Flexible foldable display device - Google Patents
Flexible foldable display device Download PDFInfo
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- CN110211504B CN110211504B CN201910579245.7A CN201910579245A CN110211504B CN 110211504 B CN110211504 B CN 110211504B CN 201910579245 A CN201910579245 A CN 201910579245A CN 110211504 B CN110211504 B CN 110211504B
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- G—PHYSICS
- 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
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Abstract
An embodiment of the present invention provides a flexible and foldable display device, including: the flexible display screen comprises a plurality of sub-display areas, wherein a folding shaft is arranged between any two adjacent sub-display areas; the first supporting strip is positioned on the non-light-emitting surface of the flexible display screen and at least corresponds to the folding shaft; phase change media are arranged in the first supporting strips, and the first supporting strips are used for changing the folding state of the flexible foldable display device. This technical scheme can solve the unable fixed stay's after the flexible display screen expandes problem among the prior art.
Description
[ technical field ] A method for producing a semiconductor device
The invention relates to the technical field of flexible display screens, in particular to a flexible foldable display device.
[ background of the invention ]
The use of flexible screen in various terminals is more and more common at present, in wrist-watch, cell-phone, dull and stereotyped trinity flexible screen application, the three is through distinguishing the area size that the flexible screen expandes conversion in three kinds of display modes, current intelligent hand face the unable fixed stay's after the flexible screen expandes problem, can't realize conveniently reading the screen when leading to switching to cell-phone mode or dull and stereotyped mode from the wrist-watch mode, move such as touch screen, and the dull and stereotyped mode is less covered to the present intelligent wrist-watch product that unifies more on the market.
[ summary of the invention ]
In view of this, an embodiment of the present invention provides a flexible and foldable display device, so as to solve the problem that a flexible display screen in the prior art cannot be fixedly supported after being unfolded.
In one aspect, an embodiment of the present invention provides a flexible and foldable display device, including: the flexible display screen comprises a plurality of sub-display areas, wherein a folding shaft is arranged between any two adjacent sub-display areas; the first supporting strip is positioned on the non-light-emitting surface of the flexible display screen and at least corresponds to the folding shaft; phase change media are arranged in the first supporting strips, and the first supporting strips are used for changing the folding state of the flexible foldable display device.
Optionally, the flexible and foldable display device further comprises: and the first supporting strip is internally provided with a conductive heating part, and the conductive heating part is electrically connected with the heating control circuit.
Optionally, the flexible and foldable display device further comprises: a display control circuit for controlling a change in a display state of the plurality of sub-display sections.
Optionally, the flexible and foldable display device further comprises: the second support bars are positioned on the non-light-emitting surface of the flexible display screen and extend in a direction perpendicular to the axial direction of the folding shaft; the second supporting bars corresponding to different sub-display areas are mutually independent.
Optionally, the second supporting strip is of one of a solid structure and a phase-changeable structure.
Optionally, the first supporting bars include two first-type supporting bars, and the two first-type supporting bars are respectively arranged corresponding to two edges of the flexible display screen in a direction perpendicular to the axial direction of the folding shaft.
Optionally, the phase change medium includes one or more of a low melting point alloy or an organic polymer material.
Optionally, the first support bar is a cylinder, and the phase change medium is disposed in the cylinder, wherein the cylinder is made of at least one of rubber and polyvinyl chloride.
Optionally, the first support bar includes a heat insulating layer, and the heat insulating layer covers the heating component and the phase change medium.
Optionally, the first support bar further includes a heat conduction insulating layer, and the heat conduction insulating layer is located between the heating component and the phase change medium.
Optionally, the flexible and foldable display device comprises: the first supporting strips are kept in a fixed bending state through the phase-state transition of the phase-change medium, and only one sub-display area is in a display opening state; the first supporting strips are kept in a fixed unidirectional extension state through the phase state transition of the phase-change medium, and only one sub-display area is in a display opening state; and in a flat and fully unfolded state, the first supporting strips are kept in a fixed unidirectional extension state through the phase state transition of the phase-change medium, and all the sub-display areas are in a same plane display opening state.
Optionally, the flexible and foldable display device further comprises: and in a flat and semi-folded state, the first supporting strips are kept in a fixed unidirectional extension state through the phase state transition of the phase-change medium, and at least two adjacent sub-display areas are in an opening state.
Compared with the prior art, the technical scheme at least has the following beneficial effects:
according to the flexible foldable display device provided by the embodiment of the invention, the folding shaft is arranged between any adjacent sub-display areas of the flexible display screen, the supporting strips (namely the first supporting strips) are also arranged at the positions, corresponding to the folding shafts, of the non-light-emitting surface of the flexible display screen, and the phase change medium is arranged in the first supporting strips. When the phase state of the phase-change medium is solid, the first supporting strips can play a role in supporting the flexible display screen, and when the phase state of the phase-change medium is changed into liquid, the flexible display screen can be bent at the folding shaft. Therefore, the first supporting strip can be used for bending the flexible display screen and supporting the flexible display screen in an unfolded state.
[ 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. 1A is a schematic structural diagram of a flexible and foldable display device according to an embodiment of the present invention;
FIG. 1B is a cross-sectional view of the flexible and foldable display device shown in FIG. 1A at A-A;
fig. 2 is a schematic structural diagram of another flexible and foldable display device provided in an embodiment of the present invention;
fig. 3 is a schematic structural diagram of another flexible and foldable display device provided in an embodiment of the present invention;
fig. 4A is a schematic structural diagram of a flexible and foldable display device in a flat and fully unfolded state according to an embodiment of the present invention;
FIG. 4B is a cross-sectional view of the flexible and foldable display device shown in FIG. 4A at A-A;
fig. 5A is a schematic structural diagram of a flexible and foldable display device provided by an embodiment of the present invention in a flat and semi-folded state;
FIG. 5B is a cross-sectional view of the flexible and foldable display device shown in FIG. 5A at A-A;
FIG. 6A is a schematic structural diagram of a flexible and foldable display device in a flat and fully folded state according to an embodiment of the present invention;
FIG. 6B is a cross-sectional view of the flexible and foldable display device shown in FIG. 6A at A-A;
FIG. 7 is a schematic structural view of a flexible and foldable display device provided by an embodiment of the present invention in a bent fully folded state;
fig. 8A is a schematic structural diagram of another flexible and foldable display device according to an embodiment of the present invention;
FIG. 8B is a cross-sectional view of the flexible and foldable display device shown in FIG. 8A at A-A;
fig. 9 is a schematic cross-sectional view of a first support bar in a flexible and foldable 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.
Fig. 1A is a schematic structural diagram of a flexible and foldable display device according to an embodiment of the present invention. Fig. 1B is a cross-sectional view of the flexible and foldable display device shown in fig. 1A at a-a.
Referring to fig. 1A, the flexible and foldable display device includes a flexible display 11, and the flexible display 11 includes a plurality of sub-display regions. For example, the flexible display 11 shown in fig. 1A includes three sub-display regions, which are a sub-display region 11A, a sub-display region 11b, and a sub-display region 11 c. And a folding shaft is arranged between any two adjacent sub-display areas. For example, as shown in fig. 1A, a folding axis 12a is included between the adjacent sub display regions 11A and 11b, and a folding axis 12b is included between the adjacent sub display regions 11b and 11 c. Wherein the folding axis 12a and the folding axis 12b are dotted line portions pointed to by the markers 12a and 12b in fig. 1A. The fog-filled area of the flexible display 11 represents the boundary position of the respective sub-display areas.
The flexible foldable display device further comprises a dial 14, and the dial 14 is arranged on the light-emitting surface of the sub-display area 11 b. The dial 14 is provided with a plurality of keys 141, and a user can control the control circuits (e.g., the heating control circuit and the display control circuit) in the flexible and foldable display device to be turned on or off by operating different keys, so that the phase change medium in the first supporting bar is subjected to solid-liquid conversion and the display state of the sub-display area is changed. The implementation of how to control the phase change medium in the first support bar to perform solid-liquid conversion and the implementation of controlling the change of the display state of the sub-display area are described in detail in the following embodiments.
The flexible display device further comprises a plurality of first supporting strips, wherein the first supporting strips are located on a non-light-emitting surface (i.e., the surface deviating from the light-emitting surface of the flexible display screen) of the flexible display screen and at least arranged corresponding to the folding shaft. For example, referring to fig. 1A and fig. 1B in combination, a first supporting strip 13a and a second supporting strip 13B are disposed on the non-light-emitting surface of the flexible display 11. Wherein the first support strip 13a is disposed at a position corresponding to the folding shaft 12a (disposed along the axial direction of the folding shaft 12 a), and the second support strip 13b is disposed at a position corresponding to the folding shaft 12b (disposed along the axial direction of the folding shaft 12 b). The first supporting strip 13a and the second supporting strip 13b may be fixed at positions along the axial direction of the folding shaft 12a and the folding shaft 12b on the non-light-emitting surface of the flexible display 11 by adhesive tape or glue, respectively.
Phase change media are arranged in the first supporting strips 13a and the first supporting strips 13 b. By phase change is meant the process by which a substance changes from one phase state to another, usually a substance having a solid, liquid and gaseous state. Optionally, in this embodiment, the phase change medium is switchable between a solid state and a liquid state.
Optionally, the phase change medium includes one or more of a low melting point alloy or an organic polymer material. The low-melting point alloy refers to a metal having a melting point of 300 ℃ or lower and an alloy thereof, and generally includes one or more low-melting point metals such as Bi, Sn, Pb, and In. The organic polymer material mainly refers to a polymer compound, generally refers to a compound having a relative molecular weight as high as several thousands to several millions, for example, a compound composed of elements such as C, H, F and Cl.
The first support strip 13a and the second support strip 13b may use the same phase change medium, or different phase change media. Optionally, the first supporting strip 13a and the second supporting strip 13b may be of a cylinder structure, the phase change medium is disposed inside the cylinder, and the material of the cylinder may be at least one of rubber and polyvinyl chloride.
When the phase state of the phase change medium is a solid state, the first support bars 13a and the second support bars 13b may function to support the flexible display 11, and when the phase state of the phase change medium is changed into a liquid state, the flexible display 11 may be bent at the folding shaft 12a and the folding shaft 12 b. Therefore, the first supporting bar can be used for not only bending the flexible display screen 11, but also supporting the flexible display screen 11 in the unfolded state. The embodiment of the application changes the phase-change medium arranged in the first supporting strips (comprising the first supporting strips 13a and the second supporting strips 13b) between a solid phase state and a liquid phase state, so that the first supporting strips are used for realizing the change of the folding state of the flexible foldable display device.
Fig. 2 is a schematic structural diagram of another flexible and foldable display device provided in an embodiment of the present invention.
Referring to fig. 2, the flexible display device includes a flexible display screen 21, and the flexible display screen 21 includes a plurality of sub-display regions. For example, the flexible display screen 21 shown in fig. 2 includes three sub-display regions, which are a sub-display region 21a, a sub-display region 21b, and a sub-display region 21 c. And a folding shaft is arranged between any two adjacent sub-display areas. For example, the folding axis 22a is included between the adjacent sub display regions 21a and 21b, and the folding axis 22b is included between the adjacent sub display regions 21b and 21 c. Wherein the folding axis 22a and the folding axis 22b are dotted line portions pointed to by the markers 22a and 22b in fig. 2. The fog-filled area of the flexible display 21 represents the boundary position of the individual sub-display areas.
First supporting bars (not shown in fig. 2, refer to the positions of the first supporting bar 13a and the second supporting bar 13B in fig. 1B) are respectively disposed at positions along the axial direction of the folding shaft 22a and the folding shaft 22B on the non-light-emitting surface of the flexible display screen 21.
Alternatively, in the embodiment of the present application, the two first supporting bars have the same structure, and the first supporting bar 23b at the position in the axial direction of the folding shaft 22b is described as an example below.
Referring to fig. 2, a partially enlarged view of the first support bar 23b, the first support bar 23b includes a heating control passage 231b, and a conductive heating member 2311b and a phase change medium 2312b are included in the heating control passage 231 b.
The flexible display device further includes a heating control circuit 25, and the heating control circuit 25 is electrically connected to the conductive heating member 2311b in the first support bar 23 b. Optionally, the heating control circuit 25 includes a control switch 251, and the heating control circuit 25 and the conductive heating member 2311b are connected or disconnected by controlling the on or off of the control switch 251.
The flexible foldable display device further comprises a dial 24, wherein the dial 24 is arranged on the light-emitting surface of the sub-display area 21 b. The dial 24 is provided with a plurality of keys 241, and a user can control the heating control circuit 25 by operating different keys 241, that is, the control switch 251 is controlled to be opened or closed. When the control switch 251 is closed, the heating control circuit 25 communicates with the conductive heating part 2311b, so that the conductive heating part 2311b heats the phase change medium 2312b, and the phase change medium 2312b is changed from a solid state to a liquid state; when the control switch 251 is turned off, the heating control circuit 25 is disconnected from the conductive heating member 2311b, and the conductive heating member 2311b stops operating, so that the phase-change medium 2312b is changed from a liquid state to a solid state. When the phase change medium in the first supporting bar is in a solid state, the first supporting bar may support the folding shaft (e.g., the folding shaft 22b is supported by the first supporting bar 23b in fig. 2), and when the phase change medium in the first supporting bar is in a liquid state, the flexible display 21 is easy to bend at the folding shaft 22a and/or the folding shaft 22 b.
It should be noted that, in the present embodiment, the heating control circuit 25 is located in the flexible foldable display device, but the specific location is not limited to the location shown in fig. 2 as long as the heating control circuit 25 can be electrically connected to the conductive heating part in the first support bar. Accordingly, FIG. 2 is a schematic illustration only, and not limiting of the invention.
Fig. 3 is a schematic structural diagram of another flexible and foldable display device according to an embodiment of the present invention.
Referring to fig. 3, the flexible display device includes a flexible display screen 31, and the flexible display screen 31 includes a plurality of sub-display regions. For example, the flexible display screen 31 shown in fig. 3 includes three sub-display regions, which are a sub-display region 31a, a sub-display region 31b, and a sub-display region 31 c. And a folding shaft is arranged between any two adjacent sub-display areas. For example, the folding axis 32a is included between the adjacent sub display regions 31a and 31b, and the folding axis 32b is included between the adjacent sub display regions 31b and 31 c. Wherein the folding axis 32a and the folding axis 32b are dotted line portions pointed to by the markers 32a and 32b in fig. 3. The fog-filled area of the flexible display 31 represents the boundary position of the individual sub-display areas.
First support bars (not shown in fig. 3, refer to the positions of the first support bars 13a and the first support bars 13B in fig. 1B) are respectively disposed at positions along the axial direction of the folding shaft 32a and the folding shaft 32B on the non-light-emitting surface of the flexible display 31.
Unlike the embodiment illustrated in fig. 2, in this embodiment, the flexible and foldable display device includes not only the heating control circuit 35 but also the display control circuit 36. The function of the heating control circuit 35 can refer to the embodiment described above with reference to fig. 2, and the display control circuit 36 is used for controlling the display state change of the plurality of sub-display regions.
The display control circuit 36 includes a control switch 361, and when the control switch 361 is closed, the display control circuit 36 may control a display driving circuit (not shown in fig. 3) of the flexible display screen 31 to drive the display state of the sub-display area to be a display on state (i.e., the sub-display area is on); when the control switch 361 is turned off, the display control circuit 36 is disconnected from the display driving circuit (not shown in fig. 3) of the flexible display panel 31, and the display state of the sub-display area is a display off state (i.e., the sub-display area is turned off).
The flexible and foldable display device further comprises a dial 34, and the dial 3 is arranged on the light-emitting surface of the sub-display area 31 b. The dial 34 is provided with a plurality of keys 341, and a user can control the heating control circuit 35 (i.e. control the control switch 351 to be opened or closed) and the display control circuit 36 (i.e. control the control switch 361 to be opened or closed) by operating different keys 341.
It should be noted that, in this embodiment, the heating control circuit 35 and the display control circuit 36 are located in the flexible foldable display device, but the specific location thereof is not limited to the location shown in fig. 3 as long as the heating control circuit 35 can be electrically connected to the conductive heating part in the first support bar, and the display control circuit 36 can be connected to the display driving circuit of the flexible display screen. Accordingly, FIG. 3 is a schematic illustration only, and not limiting of the invention.
The flexible foldable display device provided by the embodiment of the invention can comprise the following states according to different folding modes: a curved fully folded state, a flat semi-folded state, and a flat fully unfolded state. The following describes in detail the phase change of the phase-change medium in the first support bar and the display state change process of each sub-display area when the flexible and foldable display device is in the above four states with reference to specific embodiments.
Fig. 4A is a schematic structural diagram of a flexible and foldable display device in a flat and fully unfolded state according to an embodiment of the present invention. Fig. 4B is a cross-sectional view of the flexible and foldable display device shown in fig. 4A at a-a.
Referring to fig. 4A, the flexible and foldable display device includes a flexible display screen 41, and the flexible display screen 41 includes a plurality of sub-display regions. For example, the flexible display 41 shown in fig. 4A includes three sub-display regions, which are a sub-display region 41a, a sub-display region 41b, and a sub-display region 41 c. And a folding shaft is arranged between any two adjacent sub-display areas. For example, as shown in fig. 4A, a folding axis 42a is included between the adjacent sub display regions 41a and 41b, and a folding axis 42b is included between the adjacent sub display regions 41b and 41 c. Wherein the folding axis 42a and the folding axis 42b are dotted line portions pointed to by the marks 42a and 42b in fig. 4A. The fog filled area of the flexible display 41 represents the boundary position of the respective sub-display areas.
The flexible and foldable display device further comprises a dial 44, wherein the dial 44 is arranged on the light-emitting surface of the sub-display area 41 b. The dial 44 is provided with a plurality of keys 441, and a user can control the control circuits (e.g., a heating control circuit and a display control circuit) in the flexible and foldable display device to be turned on or off by operating different keys 441, so that the phase change medium in the first supporting bar is subjected to solid-liquid conversion and the display state of the sub-display area is changed.
The flexible display device further comprises a plurality of first supporting strips, wherein the first supporting strips are located on the non-light-emitting surface of the flexible display screen and at least correspond to the folding shafts. For example, referring to fig. 4A and 4B in combination, a first supporting strip 43a and a second supporting strip 43B are disposed on the non-light-emitting surface of the flexible display 41. Wherein the first support bar 43a is disposed at a position corresponding to the folding shaft 42a (disposed in the axial direction of the folding shaft 42 a), and the second support bar 43b is disposed at a position corresponding to the folding shaft 42b (disposed in the axial direction of the folding shaft 42 b).
The first supporting strips further comprise two first-type supporting strips, and the two first-type supporting strips are arranged corresponding to two edges of the flexible display screen in the axial direction of the folding shaft respectively. With reference to fig. 4A and 4B, two first-type first support bars 43c (disposed along the edge of the sub-display area 41 a) and 43d (disposed along the edge of the sub-display area 41c) are disposed on the non-light-emitting surface of the flexible display panel 41.
The first supporting strips 43c and the first supporting strips 43d also include a phase-change medium and a conductive heating element (not shown in fig. 4A and 4B), and the conductive heating element can be controlled by the heating control circuit to enter an operating state to heat the phase-change medium to change its phase state from a solid state to a liquid state or to stop operating the conductive heating element to change the phase state of the phase-change medium from a liquid state to a solid state.
As shown in fig. 4A and 4B, when the flexible and foldable display device is in the flat and fully unfolded state, each of the first support bars (i.e., the first support bar 43a and the first support bar 43B) is maintained in the fixed unidirectional extending state by the phase transition of the phase-change medium (at this time, the phase-change medium is in the solid state), and all the sub-display regions (i.e., the sub-display region 41a, the sub-display region 41B, and the sub-display region 41c) are in the on-plane display state. The first-type first supporting bars 43c and the first-type first supporting bars 43d are also maintained in a fixed one-way extending state through the transition of the phase-change medium phase (at this time, the phase-change medium phase is a solid state), so that the first supporting bars and the first-type first supporting bars support the flexible display screen 41 of the flexible foldable display device in the flat and fully unfolded state.
Fig. 5A is a schematic structural diagram of a flexible and foldable display device in a flat and semi-folded state according to an embodiment of the present invention. Fig. 5B is a cross-sectional view of the flexible and foldable display device shown in fig. 5A at a-a.
With combined reference to fig. 5A and 5B, the flexible foldable display device comprises a flexible display screen 51, said flexible display screen 51 comprising a plurality of sub-display areas. For example, the flexible display screen 51 shown in fig. 5B includes three sub-display regions, which are a sub-display region 51a, a sub-display region 51B, and a sub-display region 51 c. And a folding shaft is arranged between any two adjacent sub-display areas. For example, as shown in fig. 5A, a folding axis 52a is included between the adjacent sub-display regions 51a and 51b, and a folding axis 52b is included between the adjacent sub-display regions 51b and 51 c. Wherein the folding axis 52a and the folding axis 52b are dotted line portions pointed to by the marks 52a and 52b in fig. 5A. The fog filled area of the flexible display 51 represents the boundary position of the respective sub-display areas.
As shown in fig. 5B, a first supporting strip 53a and a second supporting strip 53B are disposed on the non-light-emitting surface of the flexible display 51. Wherein the first support bar 53a is disposed at a position corresponding to the folding shaft 52a (disposed in the axial direction of the folding shaft 52 a), and the second support bar 53b is disposed at a position corresponding to the folding shaft 52b (disposed in the axial direction of the folding shaft 52 b). Two first-type first support bars 53c (disposed along the edge of the sub-display area 51 a) and 53d (disposed along the edge of the sub-display area 51 c) are disposed on the non-light-emitting surface of the flexible display screen 51.
In this embodiment, a user can control the heating control circuit in the flexible and foldable display device to communicate with the conductive heating part in the first supporting bar 53a by operating a key on the dial 54, so that the conductive heating part heats the phase change medium in the first supporting bar 53a to change the phase state from a solid state to a liquid state. By operating the keys on the dial 54, the user can also control the display control circuit in the flexible and foldable display device to switch off the control switch corresponding to the display control channel in the first support bar 53a, so that the display state of the sub-display area 51a is the display off state (i.e., the sub-display area 51a is controlled to be turned off).
As shown in fig. 5A and 5B, in the flat and half folded state, the sub-display area 51a can be folded outward along the folding axis 52a, the first type of support bars 53c disposed at the edge of the sub-display area 51a after being folded outward contact with the non-light-emitting surface of the sub-display area 51B to support the sub-display area 51B, and the sub-display area 51a is turned off, and the sub-display area 51B and the sub-display area 51c are bright.
Further, after the sub-display area 51a is folded outwards along the folding shaft 52a, the heating control circuit may be controlled to be disconnected from the conductive heating component in the first supporting bar 53a, so that the phase state of the phase change medium in the first supporting bar 53a is changed from a liquid state to a solid state, and thus the first supporting bar 53a and the first supporting bar 53b are maintained in a fixed unidirectional extending state, so as to play a role in fixing and supporting the flexible foldable display device in the flat-out and half-folded state.
In other embodiments, according to the similar control method described above, the sub-display area 51c may be controlled to be folded outwards along the folding axis 52b, after the folding, the first type of support bars 53d disposed at the edge of the sub-display area 51c contact the non-light-emitting surface of the sub-display area 51b to support the sub-display area 51b, and the sub-display area 51c is turned off, so that the sub-display area 51a and the sub-display area 51b are bright.
It should be noted that, in the flexible and foldable display device shown in fig. 5A and 5B, the two sub-display areas in the display state of the display opened state are in the same plane. In other embodiments, the two sub-display sections (the sub-display section in the display-on state) are not in the same plane, i.e. the folding axis position between the two sub-display sections may form an angle (the angle is not 180 degrees).
In addition, the flexible display screen 51 in the flexible foldable display device shown in fig. 5A and 5B is a three-folded flexible display screen (i.e. including three sub-display regions), and in the flat and half-folded state, two sub-display regions are in the display open state (i.e. bright screen), and one sub-display region (i.e. the sub-display region folded outwards) is in the display closed state (i.e. off screen). For a flexible display screen with four folds or more (namely, including four or more sub-display areas), at least two sub-display areas are in a display opening state in a flat and half-folded state. If the flexible display screen 51 is a two-fold flexible display screen (i.e. includes two sub-display areas), in the flat and half-folded state, both the two sub-display areas are in the display open state (i.e. bright screen), but the two sub-display areas are not in the same plane, i.e. the two sub-display areas form an included angle (the included angle is not 180 degrees) at the folding axis.
Fig. 6A is a schematic structural diagram of a flexible and foldable display device in a flat and fully folded state according to an embodiment of the present invention. Fig. 6B is a cross-sectional view of the flexible and foldable display device shown in fig. 6A at a-a.
With combined reference to fig. 6A and 6B, the flexible and foldable display device comprises a flexible display screen 61, and the flexible display screen 61 comprises a plurality of sub-display areas. For example, the flexible display screen 61 shown in fig. 6B includes three sub-display regions, which are a sub-display region 61a, a sub-display region 61B, and a sub-display region 61 c. And a folding shaft is arranged between any two adjacent sub-display areas. For example, as shown in fig. 6A, a folding axis 62a is included between the adjacent sub-display regions 61a and 61b, and a folding axis 62b is included between the adjacent sub-display regions 61b and 61 c. Wherein the folding axis 62a and the folding axis 62b are dotted line portions pointed to by the marks 62a and 62b in fig. 6A. The fog filled area of the flexible display 61 represents the boundary position of the respective sub-display areas.
As shown in fig. 6B, a first supporting bar 63a and a first supporting bar 63B are disposed on the non-light-emitting surface of the flexible display 61. Wherein the first support bar 63a is disposed at a position corresponding to the folding shaft 62a (disposed in the axial direction of the folding shaft 62 a), and the second support bar 63b is disposed at a position corresponding to the folding shaft 62b (disposed in the axial direction of the folding shaft 62 b). Two first-type first support bars are disposed on the non-light-emitting surface of the flexible display screen 61, which are a first-type first support bar 63c (disposed along the edge of the sub-display area 61 a) and a first-type first support bar 63d (disposed along the edge of the sub-display area 61 c).
In this embodiment, a user can control the heating control circuit in the flexible and foldable display device to communicate with the conductive heating element in the first supporting bar 63a and the conductive heating element in the first supporting bar 63b by operating a key on the dial 64, so that the two conductive heating elements respectively heat the phase change medium in the respective first supporting bars, and the phase state of the phase change medium is changed from the solid state to the liquid state. By operating the keys on the dial 54, the user can also control the display control circuit in the flexible and foldable display device to switch off the control switches of the display control channels corresponding to the first support bars 63a and the first support bars 63b, so that the display states of the sub-display areas 61a and 61c are display off states (i.e., the sub-display areas 61a and 61c are controlled to be turned off).
As shown in fig. 6A and 6B, in the flat and fully folded state, the sub-display area 61a can be folded outward along the folding shaft 62a, the sub-display area 61c can be folded outward along the folding shaft 62B, and after the folding outward, the first type of first support bar 63c disposed at the edge of the sub-display area 61a and the first type of first support bar 63d disposed at the edge of the sub-display area 61c are respectively in contact with the non-light-emitting surface of the sub-display area 61B to support the sub-display area 61B, and the sub-display area 61a and the sub-display area 61c are turned off, and the sub-display area 61B is bright.
Further, the sub-display area 61a is folded outward along the folding shaft 62a and the sub-display area 61c is folded outward along the folding shaft 62b, and then the heating control circuit is controlled to be disconnected from the conductive heating element in the first supporting bar 63a and the conductive heating element in the first supporting bar 63b, so that the phase state of the phase change medium in the first supporting bar 63a and the first supporting bar 63b is changed from a liquid state to a solid state, and the first supporting bar 63a and the first supporting bar 63b are kept in a fixed extended state, so as to fix and support the flexible foldable display device in a single-side flat and fully folded state.
It should be noted that, the flexible display screen 61 in the flexible foldable display device shown in fig. 6A and 6B is a three-folding flexible display screen (i.e. including three sub-display regions), and in the flat and fully folded state, only one sub-display region is in the display on state (i.e. bright screen), and the other two sub-display regions (i.e. the folded sub-display regions) are in the display off state (i.e. dark screen). For a flexible display screen with four folds or more (namely, including four or more sub-display areas), under the flat and fully folded state, only one sub-display area is in the display open state, and the rest sub-display areas are in the display closed state.
Fig. 7 is a schematic structural diagram of a flexible and foldable display device provided by an embodiment of the present invention in a bent and fully folded state.
The state shown in fig. 7 in the bent fully folded state is a state in which the flexible display screen is bent on the basis that the flexible and foldable display device shown in fig. 6A is in the flat fully folded state.
Referring to fig. 7, the flexible foldable display device includes a flexible display screen 71, in a bent fully folded state, fig. 7 only shows the sub-display area 71b that is not folded outward in a flat fully folded state, a dial 74 is disposed on a light exit surface of the sub-display area 71b, and the dial 74 has a plurality of keys 741 thereon. There are a folding axis 72a and a folding axis 72b between the sub display area 71b and its left and right adjacent sub display areas (not shown in fig. 7). Wherein the folding axis 72a and the folding axis 72b are dotted line portions pointed to by the marks 72a and 72b in fig. 7. The fog filled area of the flexible display 71 represents the boundary position of the respective sub-display areas.
When the flexible and foldable display device is in the flat and fully folded state, if the flexible display screen is to be bent, a user can operate the key 741 on the dial 74 to control the heating control circuit in the flexible and foldable display device to communicate with the conductive heating element in the first supporting bar corresponding to the folding shaft 72a and the conductive heating element in the first supporting bar corresponding to the folding shaft 72b, so that the two conductive heating elements respectively heat the phase change medium in the respective first supporting bars, and the phase state of the phase change medium is changed from the solid state to the liquid state. This makes the flexible display easy to bend, and after bending to a desired state (for example, the fully-folded state of bending shown in fig. 7), by operating the key 741 on the dial 74, the heating control circuit in the flexible and foldable display device is controlled to disconnect from the conductive heating parts in the two first supporting bars, respectively, so that the phase state of the phase change medium in the two first supporting bars is changed from the liquid state to the solid state again, so as to maintain the fixed bent state.
Fig. 8A is a schematic structural diagram of another flexible and foldable display device according to an embodiment of the present invention. Fig. 8B is a cross-sectional view of the flexible and foldable display device shown in fig. 8A at a-a.
Referring to fig. 8A, the flexible and foldable display device includes a flexible display 81, and the flexible display 81 includes a plurality of sub-display regions. For example, the flexible display 81 shown in fig. 8A includes three sub-display regions, which are a sub-display region 81a, a sub-display region 81b, and a sub-display region 81 c. And a folding shaft is arranged between any two adjacent sub-display areas. For example, as shown in fig. 8A, a folding axis 82a is included between the adjacent sub display regions 81a and 81b, and a folding axis 82b is included between the adjacent sub display regions 81b and 81 c. The flexible and foldable display device further comprises a dial 84, and the dial 84 is arranged on the light-emitting surface of the sub-display area 81 b. The dial 84 is provided with a plurality of keys 841.
The flexible display device further comprises a plurality of first supporting strips, wherein the first supporting strips are located on the non-light-emitting surface of the flexible display screen and at least correspond to the folding shafts. For example, referring to fig. 8A and 8B in combination, a first supporting strip 83a and a first supporting strip 83B are disposed on the non-light-emitting surface of the flexible display 81. The first support strip 83a is disposed at a position corresponding to the folding shaft 82a (disposed along the axial direction of the folding shaft 82 a), and the second support strip 83b is disposed at a position corresponding to the folding shaft 82b (disposed along the axial direction of the folding shaft 82 b). Phase change media are arranged in the first supporting strips 83a and 83 b.
Different from the foregoing embodiments, in this embodiment, the flexible display device further includes a plurality of second supporting bars, where the second supporting bars are located on the non-light-emitting surface of the flexible display screen 81 and extend in a direction perpendicular to the axial direction of the folding shaft. The second supporting bars corresponding to different sub-display areas are mutually independent.
Specifically, as shown in fig. 8A, in the area where the sub-display area 81a is located, a second supporting strip 85a and a second supporting strip 85d are disposed, where the second supporting strip 85a and the second supporting strip 85d are respectively located on the non-light-emitting surface of the flexible display screen 81 and extend in a direction perpendicular to the axial direction of the folding shaft 82a and the folding shaft 82 b. In the area where the sub-display area 81b is located, a second supporting strip 85b and a second supporting strip 85e are arranged, the second supporting strip 85d and the second supporting strip 85e are respectively located on the non-light-emitting surface of the flexible display screen 81 and extend in the direction perpendicular to the axial direction of the folding shaft 82a and the axial direction of the folding shaft 82 b. In the area where the sub-display area 81c is located, a second supporting strip 85c and a second supporting strip 85f are arranged, and the second supporting strip 85c and the second supporting strip 85f are respectively located on the non-light-emitting surface of the flexible display screen 81 and extend in the direction perpendicular to the axial direction of the folding shaft 82a and the axial direction of the folding shaft 82 b.
Further, the first supporting bar and the second supporting bar may be an integral supporting bar for the same sub-display area. For example, with continued reference to fig. 8A, for the sub-display area 81a, a second supporting bar 85a and a second supporting bar 85d are included. The second supporting bar 85a, the second supporting bar 85d, and the first supporting bar 83a disposed along the axial direction of the folding shaft 82a (the folding shaft between the sub-display areas 81a and 81 b), which may be an integrated supporting bar. Of course, the first supporting bars 83a may be integrated with the second supporting bars 85b and the second supporting bars 85e in the sub-display area 81 b.
In this embodiment, the second supporting strip may be a solid structure, such as a solid cylinder, and the material of the solid cylinder may be at least one of rubber and polyvinyl chloride. The second supporting strip can also be of a phase-changeable structure, for example, the second supporting strip has the same structure as the first supporting strip.
Because the adjacent sub-display areas can be folded outwards along the corresponding folding axes, the second supporting strips are independent from each other. It should be noted that each of the second supporting bars shown in fig. 8A is located at an edge line of the corresponding sub-display area, which is an edge line in a direction perpendicular to the axial direction of the folding axis. In other embodiments, each of the second supporting bars may also be disposed at a middle position of the corresponding sub-display area.
Fig. 9 is a schematic cross-sectional view of a first support bar in a flexible and foldable display device according to an embodiment of the present invention.
Referring to fig. 9, the first support bar 9 is a cylindrical structure, and the cylindrical structure sequentially includes, from inside to outside: a phase change medium 91, a conductive heating member 92, and a heat insulating layer 93. The heat insulation layer 93 is used for preventing the conductive heating component 93 from scalding the device or the human body in the process of heating the phase change medium 91, so that the heat insulation layer 93 can protect the device and the human body.
Optionally, the first supporting strip 9 is a cylindrical structure, and the cylindrical structure sequentially includes from inside to outside: phase change medium 91, a heat conductive insulating layer, an electrically conductive heating member 92, and a heat insulating layer 93. Different from fig. 9, in this embodiment, the heat conducting insulating layer is further disposed between the electrically conducting heating component 92 and the phase change medium 91, and the heat conducting insulating layer is used to better conduct heat when the electrically conducting heating component 92 heats the phase change medium 91, and also plays a role of insulating the electrically conducting heating component 92 from the phase change medium 91, because when the phase change medium 91 is a low-melting-point alloy, the electrically conducting heating component 92 may be a resistance wire (also made of a metal material), and the heat conducting insulating layer may play an insulating role between the two to avoid short circuit caused by contact between the two. It should be noted that the first supporting bar structure may be applied to all the first supporting bars in the above embodiments, and if the second supporting bar also adopts a phase-changeable structure, the above structure may also be applied.
In conclusion, the flexible foldable display device provided by the technical scheme can solve the problem that the flexible display screen cannot be fixedly supported after being unfolded in the prior art.
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 (10)
1. A flexible and foldable display device, comprising:
the flexible display screen comprises a plurality of sub-display areas, wherein a folding shaft is arranged between any two adjacent sub-display areas;
the first supporting strips are positioned on the non-light-emitting surface of the flexible display screen, and at least part of the first supporting strips are arranged at positions corresponding to the folding shaft and are arranged along the axial direction of the folding shaft;
phase change media are arranged in the first supporting strips, and the first supporting strips are used for changing the folding state of the flexible foldable display device;
the first supporting strip is a cylinder, and the phase change medium is arranged in the cylinder;
the flexible and foldable display device further comprises:
the heating control circuit, there is a conductive heating part in the said first supporting bar, the said conductive heating part is connected with said heating control circuit electrically;
a display control circuit for controlling a change of a display state of the plurality of sub-display sections;
the flexible foldable display device also comprises a dial plate, wherein the dial plate is provided with a plurality of keys for controlling the heating control circuit and the display control circuit through the operation of different keys;
the key is used for controlling the heating control circuit to be communicated with the corresponding conductive heating part in the first supporting strip, so that the conductive heating part heats the phase change medium in the corresponding first supporting strip, the phase state of the phase change medium is changed from a solid state to a liquid state, the key is used for controlling the display control circuit to be disconnected corresponding to a control switch of a display control channel in the first supporting strip, and the display state of the corresponding sub-display area is a display closing state.
2. The flexible and foldable display device of claim 1, further comprising:
the second support bars are positioned on the non-light-emitting surface of the flexible display screen and extend in a direction perpendicular to the axial direction of the folding shaft;
the second supporting bars corresponding to different sub-display areas are mutually independent.
3. The flexible and foldable display device of claim 2, wherein the second support bar is one of a solid state structure and a phase changeable structure.
4. The flexible and foldable display device of claim 1, wherein the first support bar comprises two first-type support bars disposed corresponding to two edges of the flexible display screen in a direction along an axial direction of the folding shaft, respectively.
5. The flexible foldable display device of claim 1, wherein the phase change medium comprises one or more of a low melting point alloy or an organic polymer material.
6. The flexible and foldable display device of claim 1, wherein the material of the cylinder comprises at least one of rubber, polyvinyl chloride.
7. The flexible foldable display device of claim 1, wherein the first support bar comprises a thermal insulation layer that encases the conductive heating component and the phase change medium.
8. The flexible foldable display device of claim 7, wherein the first support bar further comprises a thermally conductive insulating layer between the electrically conductive heating component and the phase change medium.
9. The flexible and foldable display device of claim 1, comprising:
the first supporting strips are kept in a fixed bending state through the phase-state transition of the phase-change medium, and only one sub-display area is in a display opening state;
the first supporting strips are kept in a fixed unidirectional extension state through the phase state transition of the phase-change medium, and only one sub-display area is in a display opening state;
and in a flat and fully unfolded state, the first supporting strips are kept in a fixed unidirectional extension state through the phase state transition of the phase-change medium, and all the sub-display areas are in a same plane display opening state.
10. The flexible and foldable display device of claim 1, further comprising:
and in a flat and semi-folded state, the first supporting strip is kept in a fixed unidirectional extension state through the phase state transition of the phase-change medium, and at least two adjacent sub-display areas are in a display opening state.
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| CN111627333B (en) * | 2020-05-26 | 2022-08-09 | 张骁 | Wearable display device and wearable auxiliary assembly |
| CN111948933B (en) * | 2020-08-06 | 2022-04-08 | 维沃移动通信有限公司 | Wearable device |
| CN113299190A (en) * | 2021-05-21 | 2021-08-24 | 维沃移动通信有限公司 | Display module and electronic equipment |
| CN113410260B (en) * | 2021-06-17 | 2022-07-22 | 武汉天马微电子有限公司 | Display panel and display device |
| CN115249441A (en) * | 2022-08-24 | 2022-10-28 | 维沃移动通信有限公司 | Foldable electronic equipment |
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