CN111427476A - Flexible touch display device and touch control method - Google Patents
Flexible touch display device and touch control method Download PDFInfo
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- CN111427476A CN111427476A CN202010230176.1A CN202010230176A CN111427476A CN 111427476 A CN111427476 A CN 111427476A CN 202010230176 A CN202010230176 A CN 202010230176A CN 111427476 A CN111427476 A CN 111427476A
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
- G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
- G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
- G06F3/0412—Digitisers structurally integrated in a display
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
- G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
- G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
- G06F3/0416—Control or interface arrangements specially adapted for digitisers
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
- G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
- G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
- G06F3/044—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by capacitive means
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06V—IMAGE OR VIDEO RECOGNITION OR UNDERSTANDING
- G06V40/00—Recognition of biometric, human-related or animal-related patterns in image or video data
- G06V40/10—Human or animal bodies, e.g. vehicle occupants or pedestrians; Body parts, e.g. hands
- G06V40/12—Fingerprints or palmprints
- G06V40/13—Sensors therefor
- G06V40/1318—Sensors therefor using electro-optical elements or layers, e.g. electroluminescent sensing
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Abstract
The invention provides a flexible touch display device and a touch control method, wherein the flexible touch display device comprises: the display module comprises a front display area and at least one side display area, wherein the side display area comprises a plurality of islands distributed in an array manner and a plurality of bridges connecting the islands, each island is provided with at least one display pixel unit, and each bridge comprises a signal wire electrically connected with the display pixel unit; the touch module comprises a front touch module corresponding to the front display area and a side touch module corresponding to the side display area, wherein the side display area comprises a plurality of sub-areas with different stretching degrees, the sub-areas correspond to different sub-areas, the line widths of the touch signal lines are different, and the sub-areas with larger stretching degrees correspond to the sub-areas with larger line widths of the touch signal lines. The flexible touch display device and the touch control method provided by the invention have the advantages that the probability of false touch caused by side holding is reduced, the touch sensitivity is improved, and the touch performance of the side display area is optimized.
Description
Technical Field
The invention relates to the technical field of display, in particular to a flexible touch display device and a touch control method.
Background
Organic electroluminescent Display panels (O L ED) have gradually become the mainstream in the Display field by virtue of their excellent properties such as low power consumption, high color saturation, wide viewing angle, thin thickness, and flexibility, and can be widely applied to terminal products such as smart phones, tablet computers, and televisions, among which flexible O L ED products are most significant and have gradually become the mainstream of O L ED displays by virtue of their ability to meet various special structures.
Meanwhile, different from products such as L CD (liquid crystal display), the O L ED flexible product can realize higher screen occupation ratio through the conversion of various forms, along with the development of the flexible process, the flexible display device gradually transits from bending (bend), bending (fold) to elastic flexibility (Stretchable), particularly the appearance of an elastic flexible device, and through bending four sides, the screen occupation ratio can be further improved, even side display can be realized, and greater help is provided for more excellent overall screen.
Disclosure of Invention
The invention aims to provide a flexible touch display device and a touch control method, which can reduce the probability of false touch caused by side holding, improve the touch sensitivity and optimize the touch performance of a side display area.
The technical scheme provided by the invention is as follows:
a flexible touch display device, comprising:
the display module comprises a front display area and at least one side display area, wherein the side display area can be bent relative to the front display area, the module structure of the side display area is a stretchable display module, the stretchable display module comprises a plurality of islands distributed in an array manner and a plurality of bridges connecting the islands, each island comprises at least one display pixel unit, and each bridge comprises a signal wire electrically connected with the display pixel unit;
and a touch module comprising
The touch control signal acquisition assembly comprises a plurality of touch control electrodes and a plurality of touch control signal lines, the plurality of touch control electrodes are distributed in an array, and the touch control signal lines and the touch control electrodes are arranged in a one-to-one correspondence and are electrically connected;
the touch control module comprises a front touch control module corresponding to the front display area and a side touch control module corresponding to the side display area, the side display area comprises a plurality of sub-areas with different stretching degrees and corresponds to different sub-areas, the line widths of the touch control signal lines are different, and the sub-areas with larger stretching degrees correspond to larger line widths of the touch control signal lines.
For example, in each of the side display regions, the extending direction of the touch signal line is parallel to the bending line direction of the side display region, and the distance between two adjacent touch signal lines in the side display region in the direction perpendicular to the bending line direction is greater than or equal to the distance between two adjacent touch signal lines in the front display region in the direction perpendicular to the bending line direction.
Illustratively, in each of the side display regions, there are N sub-regions, where N is an integer greater than 1;
the nth sub-region is perpendicular to the bending lineUpper equidistant stretch variation value △nIs △ n ═ (L)1-L2)/L1Wherein L1 is the length after stretching, L2 is the length before stretching, and N is an integer of not more than N and more than 0;
the difference △ between the variation values of the equidistant stretching amounts of the nth sub-region and the nth sub-region is △ - △n-△n-1Line width L of touch signal line in the (n-1) th sub-arean-1And the line width L of the touch signal line in the nth sub-regionnDifference L between△＝△*L0＝(△n-△n-1)*L0，L0The line width standard value of the touch signal line.
Exemplarily, the touch module includes a side touch module corresponding to the whole side display area, and the side touch module further includes at least: each multi-channel data selector is connected with a plurality of touch signal lines connected with a plurality of touch electrodes positioned in the same column in the side display area; the signal processor is connected with each of the multiple data selectors, and is used for receiving the touch signals of the multiple data selectors and triggering touch operation when the signal intensity of the touch signals is greater than or equal to a first preset value.
Illustratively, the side display area includes a central area and an edge area surrounding the central area; the touch module includes a middle area touch module corresponding to the middle area and an edge area touch module corresponding to the edge area, wherein the middle area touch module at least further includes: each multi-channel data selector is connected with a plurality of touch signal lines connected with a plurality of touch electrodes positioned in the same column in the middle area; the signal processor is connected with each of the multiple data selectors, and is used for receiving the touch signals of the multiple data selectors and triggering touch operation when the signal intensity of the touch signals is greater than or equal to a second preset value.
Illustratively, in each of the side display regions, the middle region is located on a central line of the side display region parallel to the bending line, and the middle region occupies a first width D1 in a direction perpendicular to the bending line, the side display region has a second width D2 in the direction perpendicular to the bending line, and the first width D1 and the second width D2 satisfy: d1 ═ (20% to 80%) D2.
Illustratively, the display pixel units in the front display area are independently encapsulated by a first encapsulation layer, and the display pixel units on each island in the side display area are independently encapsulated by a second encapsulation layer;
and a transition area is arranged between the front display area and the side display area, and a metal packaging layer which is made of the same material as the touch signal line is arranged on the second packaging layer of the side display area and is close to the edge of the transition area.
A flexible touch display device, comprising:
the display module comprises a front display area and at least one side display area, wherein the side display area can be bent relative to the front display area, the module structure of the side display area is a stretchable display module, the stretchable display module comprises a plurality of islands distributed in an array manner and a plurality of bridges connecting the islands, each island comprises at least one display pixel unit, and each bridge comprises a signal wire electrically connected with the display pixel unit;
and the touch module, the touch module includes the positive touch module that corresponds with the positive display area and the side touch module that corresponds with the side display area, the side touch signal module is including being located the side touch module in the side display area, the side touch module includes at least:
the light shielding layer is arranged on one side of the light emitting surface of the display pixel unit and comprises a small hole imaging area;
the image sensor is arranged on one side, far away from the display pixel unit, of the light shielding layer and used for acquiring a fingerprint image of a fingerprint to be detected passing through the small hole imaging area;
and the signal processor is connected with the image sensor and used for triggering touch operation when the received fingerprint image is a complete fingerprint image.
A touch control method is applied to the flexible touch display device, and comprises the following steps:
the signal processor receives touch signals of the multi-channel data selector in the side touch module, and triggers touch operation when the signal intensity of the touch signals is greater than or equal to a first preset value, otherwise, does not trigger the touch operation;
or the signal processor receives touch signals of a plurality of paths of data selectors in the middle area touch module of the side display area, and triggers touch operation when the signal intensity of the touch signals is larger than or equal to a second preset value, otherwise, does not trigger the touch operation.
A touch control method applied to the flexible touch display device, the method comprising:
and when the fingerprint image of the image sensor in the side touch module received by the signal processor is a complete fingerprint image, triggering touch operation, otherwise, not triggering touch operation.
The beneficial effects brought by the invention are as follows:
according to the flexible touch display device and the touch control method, the corresponding side touch module is arranged in the side display area and is a capacitive touch module, and different sub-areas in the side display area have different stretching degrees during bending, so that the touch signal lines corresponding to the sub-areas are correspondingly changed, and the wider the stretching degree is, the wider the corresponding touch signal lines are, and therefore, the touch sensitivity of the side display area B can be improved by correspondingly matching the widths of the touch signal lines along with the stretching degree in the stretchable side display area B; in some embodiments disclosed in the present invention, the corresponding side touch module is disposed in the side display area, and when the signal intensity of the touch signal or the integrity of the fingerprint image performed in the side display area reaches a predetermined value (for example, 70%), that is, after a relatively complete fingerprint is detected, the touch operation is triggered, and if the fingerprint is not complete enough, the related touch operation is not performed, so that the probability of false touch caused by side holding can be reduced, the touch sensitivity can be improved, and the touch performance of the side display area can be optimized.
Drawings
Fig. 1 is a schematic plane structure diagram of a display module of a flexible touch display device according to an exemplary embodiment of the invention, in which a structure of the display module in a front display area is not shown;
fig. 2 is a schematic plane structure diagram of a touch module of a flexible touch display device according to an exemplary embodiment of the invention, in which the touch module structure of the front display area is not shown;
fig. 3 is a schematic plane structure diagram of a touch module of a flexible touch display device according to another exemplary embodiment of the invention, in which the touch module structure of the front display area is not shown;
fig. 4 is a schematic cross-sectional view illustrating a display module of a side display of a flexible touch display device according to an exemplary embodiment of the invention;
fig. 5 is a schematic cross-sectional view illustrating a touch module in a side display area of a flexible touch display device according to an exemplary embodiment of the invention;
fig. 6 is a schematic cross-sectional structural view of a side display area of a flexible touch display device according to an exemplary embodiment of the invention, where specific structures of a display module and a front touch module in a front display area are not shown, and only the display module and the side touch module on an island in the side display area are shown.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present disclosure more apparent, the technical solutions of the embodiments of the present disclosure will be described clearly and completely with reference to the drawings of the embodiments of the present disclosure. It is to be understood that the described embodiments are only a few embodiments of the present disclosure, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the described embodiments of the disclosure without any inventive step, are within the scope of protection of the disclosure.
Unless otherwise defined, technical or scientific terms used herein shall have the ordinary meaning as understood by one of ordinary skill in the art to which this disclosure belongs. The use of "first," "second," and similar terms in this disclosure is not intended to indicate any order, quantity, or importance, but rather is used to distinguish one element from another. Also, the use of the terms "a," "an," or "the" and similar referents do not denote a limitation of quantity, but rather denote the presence of at least one. The word "comprising" or "comprises", and the like, means that the element or item listed before the word covers the element or item listed after the word and its equivalents, but does not exclude other elements or items. The terms "connected" or "coupled" and the like are not restricted to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "upper", "lower", "left", "right", and the like are used merely to indicate relative positional relationships, and when the absolute position of the object being described is changed, the relative positional relationships may also be changed accordingly.
Before describing the flexible touch display device and the touch control method provided by the embodiment of the present invention, the following description is necessary for the related art:
in the related art, a Flexible touch display device, such as an O L ED device, is usually implemented by using a paper-cut method, and when a paper-cut process is used, an existing common touch device is basically incompatible with a stretchable structure, and even in a common Metal mesh (Metal mesh) or slightly further FM L OC (Flexible Multi-L a yer On Cell, multilayer Flexible film embedded) touch structure process, for technologies such as processing of a transition region between a side display region, in particular a front display region and the side display region, and a mis-touch of the side display region, the performance of the touch device in the transition region is not good, or a mis-touch is caused when the side display region is held.
In view of the above problems, embodiments of the present invention provide a flexible touch display device and a touch control method, which can optimize touch performance, improve touch sensitivity, and reduce the probability of erroneous touch during holding.
As shown in fig. 1, the flexible touch display device provided in the embodiment of the present invention includes:
the display module comprises a display module 1, wherein the display module 1 comprises a front display area A and at least one side display area B, the side display area B can be bent relative to the front display area A, the module structure of the side display area B is a stretchable display module and comprises a plurality of islands 100 which are distributed in an array manner and a plurality of bridges 200 which connect the islands 100, each island 100 is provided with at least one display pixel unit, and each bridge 200 comprises a signal line 210 which is electrically connected with the display pixel unit;
the touch module 2 comprises a touch signal acquisition assembly for acquiring touch signals and a signal processor for triggering touch operation according to the touch signals, the touch signal acquisition assembly comprises a plurality of touch electrodes 401 and a plurality of touch signal lines 400, the touch electrodes 401 are distributed in an array, and the touch signal lines 400 are arranged in one-to-one correspondence with the touch electrodes 401 and are electrically connected with the touch electrodes 401;
the touch control module comprises a front touch control module corresponding to the front display area A and a side touch control module corresponding to the side display area B, the side display area comprises a plurality of sub-areas with different stretching degrees and corresponds to different sub-areas, the line widths of the touch control signal lines are different, and the sub-areas with larger stretching degrees correspond to larger line widths of the touch control signal lines.
In the above scheme, the flexible touch display device is performed in the side display area B by using a stretchable process, wherein the planar structure of the stretchable display substrate of the side display area B is: an island 100 for placing display pixel units; a bridge 200 region for data line and signal line wiring; and an opening 300 for implementing a stretching function of the stretchable display substrate. When external force is applied, deformation mainly occurs in the bridge 200, the display pixel units on the island 100 basically keep shapes, the corresponding side touch module is arranged in the side display area B and is a capacitive touch module, and because different sub-areas in the side display area B have different stretching degrees during bending, the touch signal lines corresponding to the sub-areas are correspondingly changed, the greater the stretching degree is, the wider the corresponding touch signal lines are, thus, the manner that the stretchable side display area B correspondingly matches the widths of the touch signal lines along with the stretching degree can improve the touch sensitivity of the side display area B, and optimize the touch performance of the side display area. The large stretching degree may mean a large stretching area and a large open area.
It should be further noted that four side display areas may be provided in the flexible touch display device provided in the embodiment of the present invention, and the side display areas are arranged around four sides of the front display area, and only one structure of the side display area is illustrated in fig. 1 to 3, and the other side display areas are not illustrated. Of course, the number of the side display areas can be one, two or three.
In an exemplary embodiment, in each side display area B, the extending direction of the touch signal lines is parallel to the direction of the bending line a of the side display area B, and the distance between two adjacent touch signal lines in the side display area B in the direction perpendicular to the bending line a is greater than or equal to the distance between two adjacent touch signal lines in the front display area a in the direction perpendicular to the bending line a.
By adopting the scheme, when the touch signal lines are distributed in the side display area B, in order to reduce the risk of mistaken touch when the user holds the touch signal lines, the touch signal lines in the side display area B are distributed as much as possible and are parallel to the bending line a between the side display area B and the front display area A.
Furthermore, in an exemplary embodiment, in each side display area B, there are N sub-areas, where N is an integer greater than 1;
equidistant stretch change △ in the direction perpendicular to bend line a for the nth sub-regionnIs △ n ═ (L)1-L2)/L1Wherein L1 is the length after stretching, L2 is the length before stretching, and N is an integer of not more than N and more than 0;
the difference △ between the variation values of the equidistant stretching amounts of the nth sub-region and the nth sub-region is △ - △n-△n-1Line width L of touch signal line in the (n-1) th sub-arean-1And the line width L of the touch signal line in the nth sub-regionnDifference L between△＝△*L0＝(△n-△n-1)*L0，L0The line width standard value of the touch signal line.
In the above solution, different sub-areas have different stretching degrees when bent, the line width of the corresponding touch signal line changes correspondingly, and the greater the stretching degree is, the wider the touch signal line is, which provides an exemplary embodiment as follows:
the touch signal lines of the side display area B are parallel to the bending line a and distributed in segments, a transition area is arranged at a position close to the bending line a of the front display area a and the side display area B, the stretching amount of the transition area is small, the stretching amount of each sub-area is gradually enlarged from the transition area to the outer edge of the side display area B along the stretching direction perpendicular to the bending line a, and according to the stretching structure simulation result, the equidistant stretching amount variation value △ n of each sub-area is equal to (L n)1-L2) /L 1100%, 0.2%, 0.33%, 0.47%. 1.14%, 2.93%, 2.96% in this order, and thus the width of the touch signal line in fig. 2 along the direction parallel to the stretching direction is 1+ 0.2%, 1+ 0.33%, 1+ 0.47%,. 1+ 1.14%, 1+ 2.93%, 1+ 2.96% in this order of the standard value.
It should be noted that the above is only an exemplary simulation value, and in practical applications, the simulation value may vary according to the change of the film structure, and the stretching amount may vary correspondingly, and the line width of the corresponding touch signal line may be adjusted according to the corresponding simulation result.
In addition, in an exemplary embodiment, as shown in fig. 2, the touch module includes a side touch module corresponding to the whole side display area B, and the side touch module further includes: at least one multi-channel data selector 500, each multi-channel data selector 500 being connected to a plurality of touch signal lines 400 connected to a plurality of the touch electrodes located in the same column in the side display area B; the signal processor 600 is connected to each of the plurality of data selectors 500, and is configured to receive the touch signal from the plurality of data selectors 500 and trigger a touch operation when the signal strength of the touch signal is greater than or equal to a first predetermined value.
In the above scheme, the whole side touch module is provided with a many-to-one structure of the MUX (multi-channel data selector 500), the plurality of touch signal lines 400 are connected to the MUX500, and when the touch signal of the MUX500 received by the signal processor 600 is an incomplete touch signal, that is, when the signal intensity of the touch signal is lower than a first predetermined value, the touch operation cannot be triggered, so that the probability of false touch caused by side holding can be reduced, the touch sensitivity is improved, and the touch performance of the side display area is optimized.
For example, all touch traces in the side touch module are connected to one MUX500, or every four touch traces are connected to one MUX500 (at this time, one MUX500 from four may be selected), or every three touch traces are connected to one MUX500 (at this time, one MUX500 from three may be selected), and when all paths in the MUX500 are activated or most paths are activated, the touch operation is triggered, and the specific activation channel ratio may be adjusted according to actual needs.
For example, the first predetermined value is a signal strength of 70% of the fingerprint integrity, that is, the touch signal reaches more than 70% (about 70% of all channels of the MUX500 are activated) before the fingerprint is completely detected, the touch operation can be triggered, and of course, the first predetermined value may be set and adjusted accordingly according to the actual situation.
In addition, it should be noted that, in practical applications, the multiplexer may be replaced by other many-to-one structures with similar functions, and the present invention is not limited thereto.
In other embodiments, the MUX500 may also be disposed in a middle region of the side display region B, as shown in fig. 3, the side display region B includes a middle region B1 and an edge region B2 surrounding the middle region B1; the touch module includes a middle region B1 touch module corresponding to the middle region B1 and an edge region B2 touch module corresponding to the edge region B2, wherein the middle region B1 touch module further includes at least: at least one multi-channel data selector 500, each multi-channel data selector 500 being connected to the plurality of touch signal lines 400 connected to the plurality of touch electrodes located in the same column in the middle region B1; the signal processor 600 is connected to each of the plurality of data selectors 500, and is configured to receive the touch signal from the plurality of data selectors 500 and trigger a touch operation when the signal strength of the touch signal is greater than or equal to a second predetermined value.
In the above solution, the MUX500 is disposed in the middle area B1 of the side display area B, so that the touch signal can be effectively triggered only when the signal intensity of the touch signal is greater than or equal to the second predetermined value (the second predetermined value is greater than or equal to the first predetermined value) in the limited range of the middle area B1, for example, when all channels of the MUX500 are activated, thereby reducing the probability of false touch due to side holding, improving touch sensitivity, and optimizing touch performance of the side display area.
In an exemplary embodiment, as shown in fig. 3, in each side display region B, the middle region B1 is located on a central line of the side display region B parallel to the bending line a, and the width occupied by the middle region B1 in the direction perpendicular to the bending line a is a first width D1, the width occupied by the side display region B in the direction perpendicular to the bending line a is a second width D2, and the first width D1 and the second width D2 satisfy: d1 ═ (20% to 80%) D2.
In the above solution, the MUX500 disposed in the middle region B1 of the side display region B may be disposed near the center line of the side display region B, and the width of the middle region B1 occupying the side display region B may be between 20% and 80%, so as to improve the touch sensitivity and reduce the probability of erroneous touch.
It is understood that, in practical applications, the specific location, occupied area, etc. of the middle region B1 can be set according to practical products.
In addition, in an exemplary embodiment of the invention, as shown in fig. 4, a display module of the flexible touch display device mainly includes a substrate 10, a Buffer layer (Buffer)20, an Active layer (Active) 30, a Gate layer (Gate1& Gate2)40, an interlayer insulating layer (I L D)50, a slot layer (EB)60, a source/drain (S/D)70, a planarization layer (P L N)80, a Pixel layer (Pixel), a Pixel defining layer (PD L) 11, a spacer layer (PS), a first electrode layer 12, a light emitting layer E L13, a second electrode layer 16, a TFE encapsulation layer 14, and the like, which are disposed on the TFE encapsulation layer 14.
In an exemplary embodiment, the display pixel units in the front display region a are independently encapsulated by a first encapsulation layer (TFE encapsulation layer), and the display pixel units on each island 100 in the side display region B are independently encapsulated by a second encapsulation layer (TFE encapsulation layer); in addition, a transition area C is formed between the front display area a and the side display area B, and a metal encapsulation layer 15 made of the same material as the touch signal line 400 is disposed on the second encapsulation layer of the side display area B at a position close to the edge of the transition area C.
Specifically, the manufacturing process of the flexible touch display device in an exemplary embodiment is as follows:
firstly, providing a substrate;
then, a Buffer layer (Buffer), an Active layer (Active), and a Gate layer (Gate1& Gate2) are sequentially formed on the substrate, and for example, the Buffer layer (Buffer), the Active layer (Active), and the Gate layer (Gate1& Gate2) may be formed by a patterning process;
then, an interlayer insulating layer (I L D) and a groove opening layer (EB) are formed on the substrate continuously;
then, continuously forming a source/drain (S/D), a planarization layer (P L N), a Pixel layer (Pixel), a Pixel definition layer (PD L), a spacing layer (PS), a first electrode layer and the like on the substrate to finish the backboard process, wherein, starting to form an interlayer insulating layer, a hole opening process is carried out at the corresponding position of the peripheral side display area B by adopting a patterning process, and corresponding through holes or blind holes are manufactured to form a plurality of bridges 200 and a plurality of islands 100;
then, forming a light emitting layer E L, a second electrode layer and a TFE encapsulation layer, wherein the first electrode layer, the light emitting layer E L and the second electrode layer constitute a display pixel unit, and in consideration of the encapsulation effect, a Dam (Dam) and an encapsulated external structure can be fabricated at the peripheral edge of the front display area a, the display pixel unit of the front display area a is independently encapsulated, and the side display area B is patterned by using a patterned CVD (chemical vapor deposition) or IJP (inkjet printing) process, so as to better form each island 100 in the side display area B to be independently encapsulated;
and then, forming a touch module on the packaging layer.
As shown in fig. 6, in some embodiments, due to the reason that the polarizer 3 is disposed in the front display area a and the polarizer 3 may not be disposed in the side display area B, the flexible touch display device has a display difference between the front display area a and the side display area B, and particularly, a transition area C exists between the front display area a and the side display area B, which has a large display difference with the front display area a, so that the touch signal lines 400 in the side touch module corresponding to the side display area B are configured as follows: at least a portion of the touch signal lines 400 are disposed on the edge of the second encapsulation layer 14 of the side display area B and encapsulate the transition area C, and the portion of the touch signal lines 400 have predetermined parameters, where the predetermined parameters include the thickness, shape, and light transmittance of the touch signal lines 400, so as to adjust the display effect of the transition area C between the side display area B and the front display area a, and reduce the display difference between the front display area a and the transition area C.
In the above scheme, as shown in fig. 2 and 6, in the transition region C of the side display region B, especially the bending line a close to the front display region a and the side display region B, the transition region C is encapsulated by the touch signal line 400 to form the metal encapsulation layer 15, and the size of the transition region C between the front display region a and the side display region B is reduced by adjusting parameters of the touch signal line 400, such as thickness, width, light transmittance, and the like, so as to reduce the display difference between the transition region C and the front display region a.
It should be noted that the metal encapsulation layer and the touch signal line 400 may be formed by the same material and the same patterning process, but the metal encapsulation layer may not be used as a touch signal transmission trace, that is, may not be connected to the signal processor 600, and may be used as a metal encapsulation.
It should be noted that, in order to reduce the display difference between the front display area a and the side display area B, the specific parameters of the touch signal lines 400 of the front display area a and the touch signal lines 400 of the side display area B may also be adjusted, for example, the light transmittance of the touch signal lines 400 of the front display area a and the light transmittance of the touch signal lines 400 of the side display area B are different, so as to reduce the display difference between the front display area a and the side display area B.
It should be noted that the flexible touch display device provided in the embodiment of the present invention may be an O L ED display device, or may be other types of display devices, for example, an AMO L ED device or a Q L ED device, and may be applied to various display devices such as a mobile phone, a display, a television, a computer, and a tablet.
In addition, the present invention also provides an embodiment of a flexible touch display device, including:
the display module comprises a display module 1, wherein the display module 1 comprises a front display area A and at least one side display area B, the side display area B can be bent relative to the front display area A, the module structure of the side display area B is a stretchable display module and comprises a plurality of islands 100 which are distributed in an array manner and a plurality of bridges 200 which connect the islands 100, each island 100 is provided with at least one display pixel unit, and each bridge 200 comprises a signal line 210 which is electrically connected with the display pixel unit;
and the touch module 2, the touch module 2 includes the positive touch module that corresponds with the positive display area A and sets up in the side touch module that the side display area B corresponds, the side touch signal module includes corresponding to the side touch module in the side display area, the side touch module is to selecting optical fingerprint detection device for use, for example, adopts aperture formation of image formula fingerprint detection module, when detecting incomplete fingerprint, does not trigger touch operation.
Specifically, as shown in fig. 5, the touch module 2 includes a side touch module corresponding to the side display area B, and the side touch module is a small-hole imaging type fingerprint detection module and at least includes: the light shielding layer 600 is arranged on one side of a light-emitting surface of a display pixel unit in the display module 1, the light shielding layer 600 comprises a small-hole imaging area 610, the image sensor 700 is arranged on one side of the light shielding layer 600 far away from the display pixel unit, and the image sensor 700 is used for acquiring a fingerprint image of a fingerprint to be detected passing through the small-hole imaging area 610; the signal processor 600 is connected to the image sensor 700, and configured to trigger a touch operation when the received fingerprint image is a complete fingerprint image.
In the above scheme, the small-hole imaging fingerprint detection module is selected from the side touch modules, and when the fingerprint image received by the image sensor 700 is an incomplete fingerprint image, for example, when the integrity of the defined fingerprint image is lower than 70%, the incomplete fingerprint image is an incomplete fingerprint image, the touch operation is not triggered, so that the probability of false touch caused by side holding can be reduced, the touch sensitivity is improved, and the touch performance of the side display area is optimized.
It will of course be appreciated that the specific data on the integrity of the fingerprint image may be adjusted according to the actual circumstances.
It should be noted that, in practical applications, the specific structure of the small-hole imaging fingerprint detection module is not limited to the above-mentioned structures, and as long as the integrity of the fingerprint detected by the small-hole imaging fingerprint detection module is an incomplete fingerprint, the touch operation is not triggered, which falls within the protection scope of the present invention.
It should be noted that, in the above embodiment, the small-hole imaging fingerprint detection module may be disposed corresponding to the whole side display area B, or may be disposed only in the middle area B1 of the side display area B, or may be disposed only in a specific fingerprint detection area.
In addition, it should be noted that, in some embodiments of the present invention, the side touch module may further include both the capacitive touch module provided in the above embodiments and the pinhole imaging type fingerprint detection module provided in the above embodiments.
In addition, an embodiment of the present invention further provides a touch control method, which is applied to a flexible touch display device in which a side touch module provided in the embodiment of the present invention is a capacitive touch module, and the method includes:
in the side touch module, when the integrity of the touch signal received by the signal processor 600 is greater than or equal to a predetermined value, a touch operation is triggered.
According to the scheme, when the integrity of the touch signal of the side display area B reaches a preset value (for example, the integrity reaches 70%), namely, after a relatively complete fingerprint is detected, touch operation is triggered, and if the fingerprint is not complete enough, related touch operation is not performed, so that the probability of false touch caused by side holding can be reduced, the touch sensitivity is improved, and the touch performance of the side display area B is optimized.
In the above scheme, the touch signal integrity refers to the signal strength of the touch signal or the touch signal pattern integrity, that is, the integrity of the detected fingerprint.
By way of example, in a method,
the signal processor 600 receives the touch signals of the multi-channel data selector 500 in the side touch module, and triggers the touch operation when the signal intensity of the touch signals is greater than or equal to a first predetermined value, otherwise, does not trigger the touch operation;
or, the signal processor 600 receives the touch signals of the multi-channel data selector 500 in the touch module in the middle area B1 of the side display area B, and triggers the touch operation when the signal intensity of the touch signals is greater than or equal to the second predetermined value, otherwise, does not trigger the touch operation.
In the above scheme, when the signal intensity of the touch signal in the side display area B reaches the first predetermined value (for example, the integrity reaches 70%), that is, after a relatively complete fingerprint is detected, the touch operation is triggered, and if the fingerprint is not complete enough, the related touch operation is not performed, so that the probability of false touch caused by side holding can be reduced, the touch sensitivity can be improved, and the touch performance of the side display area B can be optimized.
The whole side touch module may be provided with a many-to-one structure of the MUX500 (the multi-channel data selector 500), the plurality of touch signal lines 400 are connected to the MUX500, and when the touch signal of the MUX500 received by the signal processor 600 is an incomplete touch signal, that is, when the signal intensity of the touch signal is lower than a first predetermined value, the touch operation cannot be triggered, so as to reduce the probability of erroneous touch.
For example, the first predetermined value is a signal strength of 70% of the fingerprint integrity, that is, the touch signal reaches more than 70% (about 70% of all channels of the MUX500 are activated) before the fingerprint is completely detected, the touch operation can be triggered, and of course, the first predetermined value may be set and adjusted accordingly according to the actual situation.
Alternatively, the MUX500 is only disposed in the middle region B1 of the side display region B, such that the valid touch signal can be triggered only when the signal strength of the touch signal is greater than or equal to a second predetermined value (the second predetermined value is greater than or equal to the first predetermined value) within a limited range of the middle region B1, for example, when all channels of the MUX500 are activated.
In addition, an embodiment of the present invention further provides a touch control method, which is applied to a flexible touch display device in which a side touch module provided in the embodiment of the present invention includes a hole imaging type fingerprint detection module, and the method includes:
when the fingerprint image of the image sensor 700 in the side touch module received by the signal processor 600 is a complete fingerprint image, the touch operation is triggered, otherwise, the touch operation is not triggered.
Above-mentioned scheme selects optical type fingerprint detection device for use in side display area B, for example, adopts aperture formation of image formula fingerprint detection module, and aperture formation of image formula fingerprint detection module is when the fingerprint image that image sensor 700 received is incomplete fingerprint image, for example, defines fingerprint image integrality and is incomplete fingerprint image when being less than 70%, then does not trigger the touch-control operation, and it can be understood of course that can be according to actual conditions, the concrete data of fingerprint image integrality can adjust.
The following points need to be explained:
(1) the drawings of the embodiments of the disclosure only relate to the structures related to the embodiments of the disclosure, and other structures can refer to the common design.
(2) For purposes of clarity, the thickness of layers or regions in the figures used to describe embodiments of the present disclosure are exaggerated or reduced, i.e., the figures are not drawn on a true scale. It will be understood that when an element such as a layer, film, region, or substrate is referred to as being "on" or "under" another element, it can be "directly on" or "under" the other element or intervening elements may be present.
(3) Without conflict, embodiments of the present disclosure and features of the embodiments may be combined with each other to arrive at new embodiments.
The above is only a specific embodiment of the present disclosure, but the scope of the present disclosure is not limited thereto, and the scope of the present disclosure should be determined by the scope of the claims.
Claims (10)
1. A flexible touch display device, comprising:
the display module comprises a front display area and at least one side display area, wherein the side display area can be bent relative to the front display area, the module structure of the side display area is a stretchable display module, the stretchable display module comprises a plurality of islands distributed in an array manner and a plurality of bridges connecting the islands, each island comprises at least one display pixel unit, and each bridge comprises a signal wire electrically connected with the display pixel unit;
and a touch module comprising
The touch control signal acquisition assembly comprises a plurality of touch control electrodes and a plurality of touch control signal lines, the plurality of touch control electrodes are distributed in an array, and the touch control signal lines and the touch control electrodes are arranged in a one-to-one correspondence and are electrically connected;
the touch control module comprises a front touch control module corresponding to the front display area and a side touch control module corresponding to the side display area, the side display area comprises a plurality of sub-areas with different stretching degrees and corresponds to different sub-areas, the line widths of the touch control signal lines are different, and the sub-areas with larger stretching degrees correspond to larger line widths of the touch control signal lines.
2. The flexible touch display device of claim 1,
in each side display area, the extending direction of the touch signal line is parallel to the bending line direction of the side display area, and the distance between two adjacent touch signal lines in the side display area in the direction perpendicular to the bending line direction is greater than or equal to the distance between two adjacent touch signal lines in the front display area in the direction perpendicular to the bending line direction.
3. The flexible touch display device of claim 1,
in each side display area, N sub-areas are provided, and N is an integer greater than 1;
equidistant stretch variation △ in the direction perpendicular to the bend line for the nth sub-regionnIs △ n ═ (L)1-L2)/L1Wherein L1 is the length after stretching, L2 is the length before stretching, and N is an integer of not more than N and more than 0;
the difference △ between the variation values of the equidistant stretching amounts of the nth sub-region and the nth sub-region is △ - △n-△n-1Line width L of touch signal line in the (n-1) th sub-arean-1And the line width L of the touch signal line in the nth sub-regionnDifference L between△＝△*L0＝(△n-△n-1)*L0，L0The line width standard value of the touch signal line.
4. The flexible touch display device of any of claims 1-3,
the touch module includes with whole the side touch module that the side display area corresponds, the side touch module still includes at least: each multi-channel data selector is connected with a plurality of touch signal lines connected with a plurality of touch electrodes positioned in the same column in the side display area; the signal processor is connected with each of the multiple data selectors, and is used for receiving the touch signals of the multiple data selectors and triggering touch operation when the signal intensity of the touch signals is greater than or equal to a first preset value.
5. The flexible touch display device of any of claims 1-3, wherein the side display area comprises a central area and an edge area surrounding the central area; the touch module includes a middle area touch module corresponding to the middle area and an edge area touch module corresponding to the edge area, wherein the middle area touch module at least further includes: each multi-channel data selector is connected with a plurality of touch signal lines connected with a plurality of touch electrodes positioned in the same column in the middle area; the signal processor is connected with each of the multiple data selectors, and is used for receiving the touch signals of the multiple data selectors and triggering touch operation when the signal intensity of the touch signals is greater than or equal to a second preset value.
6. The flexible touch display device of claim 5,
in each of the side display regions, the middle region is located on a central line of the side display region parallel to the bending line, and the middle region occupies a first width D1 in a direction perpendicular to the bending line, the side display region has a second width D2 in the direction perpendicular to the bending line, and the first width D1 and the second width D2 satisfy: d1 ═ (20% to 80%) D2.
7. The flexible touch display device of claim 1,
the display pixel units in the front display area are independently packaged through a first packaging layer, and the display pixel units on each island in the side display area are independently packaged through a second packaging layer;
and a transition area is arranged between the front display area and the side display area, and a metal packaging layer which is made of the same material as the touch signal line is arranged on the second packaging layer of the side display area and is close to the edge of the transition area.
8. A flexible touch display device, comprising:
the display module comprises a front display area and at least one side display area, wherein the side display area can be bent relative to the front display area, the module structure of the side display area is a stretchable display module, the stretchable display module comprises a plurality of islands distributed in an array manner and a plurality of bridges connecting the islands, each island comprises at least one display pixel unit, and each bridge comprises a signal wire electrically connected with the display pixel unit;
and the touch module comprises a front touch module corresponding to the front display area and a side touch module corresponding to the side display area, and the side touch module at least comprises:
the light shielding layer is arranged on one side of the light emitting surface of the display pixel unit and comprises a small hole imaging area;
the image sensor is arranged on one side, far away from the display pixel unit, of the light shielding layer and used for acquiring a fingerprint image of a fingerprint to be detected passing through the small hole imaging area;
and the signal processor is connected with the image sensor and used for triggering touch operation when the received fingerprint image is a complete fingerprint image.
9. A touch control method applied to the flexible touch display device according to any one of claims 4 or 5, the method comprising:
the signal processor receives touch signals of the multi-channel data selector in the side touch module, and triggers touch operation when the signal intensity of the touch signals is greater than or equal to a first preset value, otherwise, does not trigger the touch operation;
or the signal processor receives touch signals of a plurality of paths of data selectors in the touch module in the middle area of the side display area, and triggers touch operation when the signal intensity of the touch signals is larger than or equal to a second preset value, otherwise, does not trigger the touch operation.
10. A touch control method applied to the flexible touch display device according to claim 8, the method comprising:
and when the fingerprint image of the image sensor in the side touch module received by the signal processor is a complete fingerprint image, triggering touch operation, otherwise, not triggering touch operation.
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