CN108877516B - Flexible display device and display control method of flexible display device - Google Patents
Flexible display device and display control method of flexible display device Download PDFInfo
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- CN108877516B CN108877516B CN201810597320.8A CN201810597320A CN108877516B CN 108877516 B CN108877516 B CN 108877516B CN 201810597320 A CN201810597320 A CN 201810597320A CN 108877516 B CN108877516 B CN 108877516B
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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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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
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Abstract
The invention provides a flexible display device and a display control method of the flexible display device, and belongs to the technical field of display. The flexible display device includes: a piezoelectric layer and a display light emitting layer which are arranged in a stacked manner; a display driving layer electrically connected to the display light emitting layer; the display driving layer drives the display light emitting layer to emit light to output display contents according to the piezoelectric layer through an electric signal generated based on the piezoelectric effect, so that the display contents of the flexible display device are controlled in a deformation mode, and the problem that the display contents of the flexible display device are difficult to control in a traditional mode is effectively solved. In addition, the piezoelectric layer is used as a newly introduced functional layer, so that the stress distribution of the flexible display device during bending can be improved, and the bending resistance of the flexible display device is further improved.
Description
Technical Field
The invention relates to the technical field of display, in particular to a flexible display device and a display control method of the flexible display device.
Background
With the development of flexible technology, flexible display devices are getting closer to people's lives, but some flexible display devices, such as ultra-thin flexible display devices, are inconvenient to control the display contents in a conventional manner due to their too soft characteristics.
Therefore, how to control the display content of the flexible display device becomes an urgent problem to be solved.
Disclosure of Invention
In view of the above, embodiments of the present invention are directed to providing a flexible display device and a display control method of the flexible display device, so as to solve the problem that it is difficult for the flexible display device to control display contents in a conventional manner.
One aspect of the present invention provides a flexible display device including: a piezoelectric layer and a display light emitting layer which are arranged in a stacked manner; and a display driving layer electrically connected to the display light emitting layer; wherein the display driving layer drives the display light emitting layer to emit light by an electric signal generated based on the piezoelectric effect according to the piezoelectric layer to output display contents.
In one embodiment of the present invention, further comprising: a display controller electrically connected to the piezoelectric layer and the display driving layer, respectively, configured to: receiving an electrical signal generated by the piezoelectric layer; and generating a corresponding display control command according to the electric signal and sending the display control command to the display driving layer.
In one embodiment of the invention, the piezoelectric layer generates a corresponding electrical signal depending on the location and/or magnitude of the deformation that occurred.
In one embodiment of the invention, the display control instruction comprises one of picture switching, video fast forward, video rewind, display on, display off and display pause.
In one embodiment of the present invention, the flexible display device further comprises: an optical coupling layer disposed between the piezoelectric layer and the display light emitting layer.
In one embodiment of the present invention, the flexible display device further comprises: a flexible substrate, wherein the display driving layer is formed on the flexible substrate.
In one embodiment of the present invention, the flexible display device further comprises: a thin film encapsulation layer, wherein the thin film encapsulation layer is formed on the piezoelectric layer.
In one embodiment of the invention, the material of the piezoelectric layer includes polyvinylidene fluoride.
In one embodiment of the present invention, the material of the piezoelectric layer further comprises lead zirconate titanate, wherein the lead zirconate titanate is doped in polyvinylidene fluoride.
In one embodiment of the invention, the thickness of the piezoelectric layer is between 1 nanometer and 300 nanometers.
Another aspect of the present invention provides a display control method of a flexible display device, wherein the flexible display device includes: a piezoelectric layer and a display light emitting layer which are arranged in a stacked manner; a display driving layer electrically connected to the display light emitting layer; wherein the display control method is applied to the display driving layer, and comprises: and driving the display luminous layer to emit light according to an electric signal generated by the piezoelectric layer based on the piezoelectric effect so as to output display content.
Another aspect of the present invention provides a display control method of a flexible display device, wherein the flexible display device includes: a piezoelectric layer and a display light emitting layer which are arranged in a stacked manner; a display driving layer electrically connected to the display light emitting layer and configured to drive the display light emitting layer to emit light to output display contents; and a display controller electrically connected to the piezoelectric layer and the display driving layer, respectively; the display control method comprises the following steps: receiving an electrical signal generated by the piezoelectric layer through a piezoelectric effect; and generating a corresponding display control command according to the electric signal and sending the display control command to the display driving layer.
In one embodiment of the invention, the piezoelectric layer generates a corresponding electrical signal depending on the location and/or magnitude of the deformation that occurred.
According to the technical scheme, the display driving layer can drive the display light-emitting layer to emit light to output display contents according to the electric signals generated by the piezoelectric layer based on the piezoelectric effect, so that the display contents of the flexible display device are controlled in a deformation mode, and the problem that the display contents of the flexible display device are difficult to control in a traditional mode is effectively solved. In addition, the piezoelectric layer is used as a newly introduced functional layer, so that the stress distribution of the flexible display device during bending can be improved, and the bending resistance of the flexible display device is further improved.
Drawings
Fig. 1 is a schematic structural view of a flexible display device according to an embodiment of the present invention.
Fig. 2 is a schematic structural view of a flexible display device according to another embodiment of the present invention.
Fig. 3 is a schematic flowchart of a display control method of a flexible display device according to an embodiment of the present invention.
The reference numbers in the above figures are as follows: the display device comprises a thin film packaging layer 1, a piezoelectric layer 2, a display light emitting layer 3, a flexible substrate 4, an optical coupling layer 5 and a display driving layer 6.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the 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.
Wherever possible, the same reference numbers will be used throughout the drawings to refer to the same or like parts.
Fig. 1 is a schematic structural view of a flexible display device according to an embodiment of the present invention.
As shown in fig. 1, the flexible display device may include: a piezoelectric layer 2 and a display light emitting layer 3 which are provided in a stacked manner; a display driving layer 6 electrically connected to the display light emitting layer 3; wherein the display driving layer drives the display light emitting layer to emit light by an electric signal generated based on a piezoelectric effect according to the piezoelectric layer to output display contents.
Specifically, in the flexible display device, the piezoelectric layer 2 can generate an electric signal by the piezoelectric effect in the case of deformation, and the display driving layer 6 can drive the display light emitting layer to emit light in accordance with the electric signal so as to output display contents. For example, the flexible display device may be a flexible Organic Light Emitting Diode (OLED) display device, and the display driving layer 6 may be a Thin-film transistor (TFT) layer, and thus display contents may be controlled by the TFT. Further, the display driving layer 6 drives the display light emitting layer to emit light according to the electrical signal to output the display content, which may be display on, display off, or the like, and the specific situation corresponding to the display content is not limited herein. In addition, the deformation of the piezoelectric layer 2 can include, but is not limited to, bending, folding, and tactile pressing.
According to the technical scheme, the display driving layer can drive the display light-emitting layer to emit light to output display contents according to the electric signals generated by the piezoelectric layer based on the piezoelectric effect, so that the display contents of the flexible display device are controlled in a deformation mode, and the problem that the display contents of the flexible display device are difficult to control in a traditional mode is effectively solved. In addition, the piezoelectric layer is used as a newly introduced functional layer, so that the stress distribution of the flexible display device during bending can be improved, and the bending resistance of the flexible display device is further improved.
In another embodiment of the present invention, further comprising: a display controller electrically connected to the piezoelectric layer 2 and the display driving layer 6, respectively, configured to: receiving an electrical signal generated by the piezoelectric layer 2 through the piezoelectric effect; and generating a corresponding display control command according to the electric signal and sending the display control command to the display driving layer 6.
In particular, in a flexible display device, the piezoelectric layer 2 may generate an electrical signal through the piezoelectric effect in case of deformation, so that the display controller may generate a corresponding display control instruction according to the electrical signal. Further, the display driving layer 6 may control the light emission of the display light emitting layer 3 under the effect of the display control command, and then output the display content corresponding to the display control command.
According to the embodiment of the invention, the display controller can receive the electric signal generated by the piezoelectric layer 2 through the piezoelectric effect, and then generate the corresponding display control instruction according to the electric signal to be sent to the display driving layer 6, so that the display light-emitting layer 3 can emit light under the action of the display driving layer 6 to output display contents, and therefore, the display contents of the flexible display device can be controlled through a deformation mode, and the problem that the display contents of the flexible display device are difficult to control through a traditional mode is effectively solved. In addition, the piezoelectric layer 2, as a newly introduced functional layer, can also improve the stress distribution of the flexible display device during bending, thereby improving the bending resistance of the flexible display device.
In another embodiment of the invention, the piezoelectric layer 2 generates a corresponding electrical signal depending on the position and/or magnitude of the deformation that occurs.
In particular, the piezoelectric layer 2 may generate different electrical signals due to different locations of the deformations and/or different magnitudes of the deformations. For example, in flexible display device, the compound mode of deformation position and/or deformation size can have the multiple, therefore, piezoelectric layer 2 can produce multiple signal of telecommunication, and the signal of telecommunication can contain deformation position or deformation size promptly, can also contain the information of the deformation position and the deformation size of piezoelectric layer 2 simultaneously, and then different signal of telecommunication can correspond different display content to realized controlling display content through the deformation of control flexible display device.
For example, the flexible display device is folded in half by 180 °, and the display of the flexible display device can be turned off, that is, the flexible display device can be in a black screen state; unfolding the flexible display device folded in half at 180 degrees can make the screen of the flexible display device light up, further present a display interface, and the like.
In another embodiment of the present invention, the display control instruction may include one of a picture switch, a video fast forward, a video rewind, a display on, a display off, and a display pause.
Specifically, the display control instruction is a normal instruction, that is, a normal display control can be realized by means of deformation. It should be understood that the display control instructions may include, but are not limited to, those described above.
Fig. 2 is a schematic structural view of a flexible display device according to another embodiment of the present invention.
In another embodiment of the present invention, as shown in fig. 2, the flexible display device further includes: an optical coupling layer 5 arranged between the piezoelectric layer 2 and the display light emitting layer 3.
In particular, in order to meet the application variability, further functional layers, for example, an optical coupling layer 5, may be present between the piezoelectric layer 2 and the display light emitting layer 3 to ensure the optical coupling-out efficiency of the flexible display device.
It should be understood that, besides being located between the piezoelectric layer 2 and the display light emitting layer 3, other functional layers may also be located on the side of the piezoelectric layer 2 away from the display light emitting layer 3, or on the side of the display light emitting layer 3 away from the piezoelectric layer 2, which is not limited here.
In another embodiment of the invention, the material used for the piezoelectric layer 2 further has a high refractive index.
In particular, the refractive index of the material used for the piezoelectric layer 2 may be greater than 1.7. For example, the piezoelectric layer 2 may be made of polyvinylidene fluoride (PVDF) and doped with lead zirconate titanate (PZT), and specifically, the doping percentage (volume percentage) of the lead zirconate titanate may be 10% to 70%, preferably 30% to 40%, for example 30%. Herein, the volume percentage may refer to a percentage value of the volume of the lead zirconate titanate to the volume of the lead zirconate titanate and the polyvinylidene fluoride. Due to the incorporation of lead zirconate titanate, on the one hand, the piezoelectric layer 2 comprising polyvinylidene fluoride (PVDF) can ensure the bending property, and on the other hand, the refractive index of the piezoelectric layer 2 comprising polyvinylidene fluoride (PVDF) can be larger than 1.7, so that the piezoelectric layer 2 has a high refractive index, and at this time, the piezoelectric layer 2 can cooperate with the optical coupling layer 5, thereby increasing the optical coupling-out efficiency of the flexible display device.
Of course, when the optical coupling layer 5 is not present between the piezoelectric layer 2 and the display light emitting layer 3, and the piezoelectric layer 2 has both piezoelectric performance and high refractive index, the piezoelectric layer 2 can also function as the optical coupling layer 5.
In another embodiment of the present invention, as shown in fig. 2, the flexible display device further includes: a flexible substrate 4, wherein a display driving layer 6 is formed on the flexible substrate 4.
Specifically, the flexible substrate 4 may be used to support the display driving layer 6 or more, and may disperse a part of the stress when the flexible display device is bent due to the bending property.
In another embodiment of the present invention, the flexible display device further includes: a thin film encapsulation layer 1, wherein the thin film encapsulation layer 1 is formed on the piezoelectric layer 2.
Specifically, the thin film encapsulation layer 1 can be used as a protective layer for protecting the piezoelectric layer 2 after encapsulating the piezoelectric layer 2, so as to protect the display screen of the flexible display device.
In another embodiment of the invention, the material of the piezoelectric layer 2 comprises polyvinylidene fluoride.
Specifically, since pvdf has characteristics of softness, brittleness, poor hydrophilicity, piezoelectric effect, and the like, it is preferable that pvdf is used as a material of the piezoelectric layer 2 to ensure a piezoelectric effect function, and also to be used as a protective layer, thereby improving water and oxygen barrier capability of the flexible display device.
In another embodiment of the present invention, the material of the piezoelectric layer further comprises lead zirconate titanate, wherein the lead zirconate titanate is doped in polyvinylidene fluoride.
Specifically, the piezoelectric layer 2 may be a composite film layer composed of polyvinylidene fluoride and lead zirconate titanate, for example, the lead zirconate titanate may be doped in the polyvinylidene fluoride, and the volume percentage may be between 10% and 70%, and preferably, the volume percentage may be between 30% and 40%. Herein, the volume percentage may refer to a percentage value of the volume of the lead zirconate titanate to the volume of the lead zirconate titanate and the polyvinylidene fluoride. Furthermore, the composite film can have the advantages of both piezoelectric polymer and piezoelectric ceramic, namely, the composite film can have both stronger piezoelectric performance and good toughness, so that the flexible display device can be ensured to have both stronger piezoelectric performance and good toughness.
It is to be understood that the piezoelectric layer 2 may be any one of an organic material film, an inorganic material film and an organic-inorganic composite film, the material of the piezoelectric layer 2 is selected so as to be capable of generating a piezoelectric effect, and the material of the piezoelectric layer 2 is not particularly limited in the present invention.
In another embodiment of the invention the thickness of the piezoelectric layer 2 is between 1 and 300 nm.
Specifically, the piezoelectric layer 2 with the thickness of 1 nm to 300 nm can effectively wrap particles (particles), so that the packaging effect of the film packaging layer 1 is improved, the stress distribution of the film layer can be changed, the bending resistance of the flexible display device is improved, in addition, the optical coupling output capacity can be adjusted, and the optical coupling output efficiency of the flexible display device is improved.
It should be understood that the doping process involved in each of the above embodiments may be a simultaneous evaporation process. Specifically, for example, the piezoelectric layer 2 is polyvinylidene fluoride doped with 30% by volume of lead zirconate titanate, and the simultaneous evaporation process at this time may refer to forming the piezoelectric layer 2 corresponding to the mixed raw material in the flexible display device by evaporating the mixed raw material of polyvinylidene fluoride doped with 30% by volume of lead zirconate titanate. Herein, the volume percentage may refer to a percentage value of the volume of the lead zirconate titanate to the volume of the lead zirconate titanate and the polyvinylidene fluoride.
The flexible display device according to an embodiment of the present invention is described above, and a display control method of the flexible display device according to an embodiment of the present invention is described below with reference to fig. 3.
Fig. 3 is a schematic flowchart of a display control method of a flexible display device according to an embodiment of the present invention.
In the display control method of the flexible display device, as shown in fig. 1, the flexible display device may include: a piezoelectric layer 2 and a display light emitting layer 3 which are provided in a stacked manner; a display driving layer 6 electrically connected to the display light emitting layer 3 and configured to drive the display light emitting layer 3 to emit light to output display contents; and a display controller electrically connected to the piezoelectric layer 2 and the display driving layer 6, respectively.
As shown in fig. 3, the display control method may include:
an electrical signal generated by piezoelectric induction of the piezoelectric layer 2 is received 310.
And 320, generating a corresponding display control command according to the electric signal and sending the display control command to the display driving layer 6.
For the detailed description of the display control method of the flexible display device, reference may be made to the above embodiments, and the detailed description is omitted here to avoid redundancy.
According to the embodiment of the invention, the display controller can receive the electric signal generated by the piezoelectric layer 2 through the piezoelectric effect, and then generate the corresponding display control instruction according to the electric signal to be sent to the display driving layer 6, so that the display light-emitting layer 3 can emit light under the action of the display driving layer 6 to output display contents, and therefore, the display contents of the flexible display device can be controlled through a deformation mode, and the problem that the display contents of the flexible display device are difficult to control through a traditional mode is effectively solved. In addition, the piezoelectric layer 2, as a newly introduced functional layer, can also improve the stress distribution of the flexible display device during bending, thereby improving the bending resistance of the flexible display device.
In another embodiment of the invention, the piezoelectric layer 2 generates a corresponding electrical signal depending on the position and/or magnitude of the deformation that occurs.
For a detailed description of the piezoelectric layer 2, reference is also made to the above embodiments, which are not repeated here in order to avoid repetition.
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 and the like that are within the spirit and principle of the present invention are included in the present invention.
Claims (7)
1. A flexible display device, comprising:
a piezoelectric layer and a display light emitting layer which are arranged in a stacked manner;
a display driving layer electrically connected to the display light emitting layer; and
a thin film encapsulation layer formed on the piezoelectric layer;
wherein the display driving layer drives the display light emitting layer to emit light by an electric signal generated based on a piezoelectric effect according to the piezoelectric layer to output display contents, an
The piezoelectric layer is arranged as a continuous film layer and is positioned on the light emitting side of the display light emitting layer, the piezoelectric layer is positioned between the film packaging layer and the display light emitting layer, and the piezoelectric layer is made of polyvinylidene fluoride and lead zirconate titanate doped in the polyvinylidene fluoride.
2. The flexible display device according to claim 1, further comprising:
a display controller electrically connected to the piezoelectric layer and the display driving layer, respectively, and configured to receive the electrical signal generated by the piezoelectric layer; and generating a corresponding display control instruction according to the electric signal and sending the display control instruction to the display driving layer.
3. The flexible display device of claim 2, wherein the piezoelectric layer generates the corresponding electrical signal according to a position and/or an amount of deformation of the piezoelectric layer.
4. The flexible display device of claim 2, wherein the display control instructions comprise one of a picture switch, a video fast forward, a video rewind, a display on, a display off, and a display pause.
5. The flexible display device according to claim 1, further comprising: an optical coupling layer disposed between the piezoelectric layer and the display light emitting layer.
6. The flexible display device according to claim 1, further comprising: a flexible substrate, wherein the display driving layer is formed on the flexible substrate.
7. The flexible display device according to any of claims 1 to 6, wherein the piezoelectric layer has a thickness of between 1 nm and 300 nm.
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| CN109829419B (en) | 2019-01-28 | 2021-08-24 | 京东方科技集团股份有限公司 | Fingerprint identification module, driving method and manufacturing method thereof and display device |
| CN111694455A (en) * | 2019-03-15 | 2020-09-22 | 陕西坤同半导体科技有限公司 | Display panel and display device thereof |
| CN110098233A (en) | 2019-05-06 | 2019-08-06 | 京东方科技集团股份有限公司 | A kind of display device and its deformation detecting method |
| GB2594944A (en) * | 2020-05-12 | 2021-11-17 | Hattersley Power Electronics Ltd | Display apparatus, textile, garment and method |
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