Display panel and manufacturing method therefor, and display device

Abstract

The present application provides a display panel and a manufacturing method therefor, and a display device. The display panel (100) comprises a driving substrate (10), a first electrode layer (21), a light-emitting layer (22), a second electrode layer (23), a packaging layer (40), a touch film group (50), and a color filter substrate (60) which are sequentially stacked. The touch film group (50) comprises a driving electrode layer (51), a sensing electrode layer (52) and a liquid crystal layer (53); the driving electrode layer (51) is arranged on the side of the packaging layer (40) away from the second electrode layer (23); the sensing electrode layer (52) is arranged on the side of the driving electrode layer (51) away from the packaging layer (40) and is insulated from the driving electrode layer (51); and the liquid crystal layer (53) is arranged between the driving electrode layer (51) and the sensing electrode layer (52). In a touch stage, the sensing electrode layer (52) deforms as the color filter substrate (60) is pressed downwards, so that the thickness of the liquid crystal layer (53) located in a touch point area (S) is reduced, and the amount of change in the thickness is in direct proportion to the touch force in the touch point area (S). According to the display panel (100), the touch film group (50) can be embedded in the panel, and touch pressure graded identification can be achieved.

Description

Display panel and manufacturing method thereof, and display device

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This application claims priority based on Chinese patent application 2023110769086 filed on August 25, 2023, and all of its contents are incorporated herein by reference. Technical Field

[0003] The present application relates to the field of display technology, and in particular to a display panel and a manufacturing method thereof, and a display device. Background Art

[0004] With the continuous development of display technology, display products such as mobile phones and computers have integrated various functions and become increasingly important items in people's lives. Ordinary flat touch can no longer meet user needs, and force touch technology has become a research hotspot.

[0005] Currently, for Organic Light Emitting Diode (OLED) display products, due to their mainstream bottom-emitting structure with a whole layer of cathode, it is difficult to achieve embedded touch. Touch can only be achieved by a top touch panel made independently after the packaging layer. At the same time, the thickness of each layer of OLED is basically fixed after the finished product, and the variable range is small, so pressure grading recognition cannot be achieved.

[0006] Summary of the Invention

[0007] The present application provides a display panel and a manufacturing method thereof, and a display device, aiming to solve the problem in the prior art that display panels cannot implement embedded touch pressure grading recognition.

[0008] In order to solve the above technical problems, the first technical solution provided by this application is to provide a display panel. The display panel includes:

[0009] Driver substrate;

[0010] a first electrode layer, disposed on one side of the driving substrate;

[0011] a second electrode layer, disposed on a side of the first electrode layer away from the driving substrate;

[0012] a light-emitting layer, disposed between the first electrode layer and the second electrode layer;

[0013] an encapsulation layer, disposed on and covering the second electrode layer;

[0014] The display panel further includes a color film substrate and a touch film group. The touch film group is arranged on a side of the encapsulation layer away from the drive substrate. The color film substrate is arranged on a side of the touch film group away from the encapsulation layer. The touch film group includes:

[0015] a driving electrode layer, disposed on a side of the packaging layer away from the second electrode layer;

[0016] a sensing electrode layer, disposed on a side of the driving electrode layer away from the packaging layer and insulated from the driving electrode layer;

[0017] A liquid crystal layer is provided between the driving electrode layer and the sensing electrode layer. During a touch phase, the sensing electrode layer deforms as the color filter substrate is pressed downward, so that the thickness of the liquid crystal layer in the touch point area decreases, and the thickness change is proportional to the touch force in the touch point area.

[0018] The touch film assembly further includes a first alignment layer and a second alignment layer. The first alignment layer is disposed on a side of the driving electrode layer away from the encapsulation layer, and the second alignment layer is disposed on a side of the sensing electrode layer close to the liquid crystal layer.

[0019] The color filter substrate includes a packaging substrate and a color filter layer, and the color filter layer is arranged between the packaging substrate and the sensing electrode layer.

[0020] The touch film group is in mutual capacitance touch mode or self capacitance touch mode, the driving electrode layer includes a plurality of driving electrodes extending along a first direction, and the sensing electrode layer includes a plurality of sensing electrodes extending along a second direction, and the first direction intersects the second direction.

[0021] The liquid crystal layer further includes a support column, which is arranged between the driving electrode layer and the sensing electrode layer. The support column includes a first support column and a second support column. The opposite ends of the first support column are respectively abutted against the driving electrode layer and the sensing electrode layer. The second support column is arranged on a side of the driving electrode layer away from the encapsulation layer, and the height of the second support column is less than that of the first support column.

[0022] In order to solve the above technical problems, the second technical solution provided by this application is to provide a method for manufacturing a display panel. The manufacturing method includes:

[0023] Provide a drive substrate;

[0024] Sequentially forming a first electrode layer, a light-emitting layer, a second electrode layer and an encapsulation layer on the driving substrate;

[0025] Manufacturing a driving electrode layer on the packaging layer to form a lower substrate;

[0026] Provide color film substrate;

[0027] Manufacturing a sensing electrode layer on the color filter substrate to form an upper substrate;

[0028] coating liquid crystal on a side of the driving electrode layer away from the encapsulation layer or a side of the sensing electrode layer away from the color filter substrate to form a liquid crystal layer;

[0029] Aligning the upper substrate and the lower substrate so that the liquid crystal layer is located between the driving electrode layer and the sensing electrode layer;

[0030] In the touch stage, the sensing electrode layer deforms as the color filter substrate is pressed downward, so that the thickness of the liquid crystal layer in the touch point area becomes smaller, and the thickness change is proportional to the touch force of the touch point area.

[0031] Wherein, after the step of forming the driving electrode layer on the encapsulation layer, the method further comprises: forming a first alignment layer on the driving electrode layer;

[0032] After the step of forming the sensing electrode layer on the color filter substrate, the method further includes forming a second alignment layer on the sensing electrode layer.

[0033] The step of manufacturing the driving electrode layer on the encapsulation layer includes: depositing a first transparent conductive layer on the encapsulation layer;

[0034] patterning the first transparent conductive layer to form a plurality of driving electrodes extending along a first direction;

[0035] The step of manufacturing the sensing electrode layer on the color filter substrate includes:

[0036] depositing a second transparent conductive layer on the color filter substrate;

[0037] The second transparent conductive layer is patterned to form a plurality of sensing electrodes extending along a second direction; wherein the second direction intersects with the first direction.

[0038] In order to solve the above technical problems, the third technical solution provided by this application is to provide a display device. The display device includes:

[0039] A display panel for displaying images, wherein the display panel is the display panel involved in the above technical solution, and the display panel is manufactured by the manufacturing method involved in the above technical solution;

[0040] The measurement and control circuit is electrically connected to the driving electrode layer and the sensing electrode layer, and is used to identify the functions of flat touch and force touch.

[0041] Among them, the display device also includes a control module, which is electrically connected to the measurement and control circuit and the display panel. The control module is used to receive and process the touch signal of the measurement and control circuit, generate a drive signal, and output the drive signal to the display panel so that the display panel displays the corresponding image.

[0042] Beneficial effects of the present application: Different from the prior art, the present application provides a display panel and a preparation method thereof, and a display device, wherein the display panel includes a driving substrate, a first electrode layer, a light-emitting layer, a second electrode layer, an encapsulation layer, a touch film group, and a color film substrate; the display panel disposes the touch film group between the encapsulation layer and the color film substrate, and embeds the touch film group in the display panel, which is beneficial to the lightweight design of the display panel and the reduction of cost; in the touch stage, according to the different pressing positions, the capacitance between the finger or the touch part and the sensing electrode changes, so that the display panel can identify the touch point and realize plane touch; at the same time, by A liquid crystal layer is provided between the layers. During the touch phase, when the sensing electrode layer deforms in response to the downward pressure on the color film substrate, the thickness of the liquid crystal layer in the touch point area can be reduced along with the deformation of the sensing electrode layer, causing the capacitance of the touch point area to change, thereby realizing the pressure touch function. The thickness change of the liquid crystal layer is proportional to the touch force in the touch point area, that is, the thickness change of the liquid crystal layer has a certain matching relationship with the touch force, thereby enabling the display panel to recognize touches of different forces and realize pressure graded recognition. Moreover, by providing the liquid crystal layer between the sensing electrode layer and the driving electrode layer, the light efficiency can be maintained, the light loss can be reduced, and the display effect can be maintained. BRIEF DESCRIPTION OF THE DRAWINGS

[0043] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0044] FIG1 is a schematic structural diagram of a display panel provided in a first embodiment of the present application;

[0045] FIG2 is a schematic structural diagram of a display panel provided in a second embodiment of the present application;

[0046] FIG3 is a schematic diagram of a planar structure of a driving electrode layer and a sensing electrode layer provided in one embodiment of the present application;

[0047] FIG4 is a schematic diagram of a touch film assembly in a touch stage according to an embodiment of the present application;

[0048] FIG5 is a schematic structural diagram of a display panel provided in a third embodiment of the present application;

[0049] FIG6 is a schematic flow chart of a method for manufacturing a display panel according to an embodiment of the present application;

[0050] FIG7 is a schematic flow chart of a method for preparing a lower substrate according to an embodiment of the present application;

[0051] FIG8 is a process flow chart of preparing the lower substrate corresponding to the embodiment of FIG6 ;

[0052] FIG9 is a schematic flow chart of a method for preparing an upper substrate according to an embodiment of the present application;

[0053] FIG10 is a flow chart of the preparation process of the upper substrate corresponding to the embodiment of FIG9 ;

[0054] FIG11 is a schematic diagram of a process flow for assembling an upper substrate and a lower substrate according to an embodiment of the present application;

[0055] FIG12 is a schematic structural diagram of a display device provided in an embodiment of the present application.

[0056] Reference numerals: 100 - display panel; 101 - lower substrate; 102 - upper substrate; 10 - driving substrate; 11 - base substrate; 12 - pixel driving circuit layer; 21 - first electrode layer; 211 - first electrode; 22 - light-emitting layer; 221 - first light-emitting layer; 222 - second light-emitting layer; 223 - third light-emitting layer; 23 - second electrode layer; 231 - second electrode; 30 - pixel defining layer; 31 - pixel opening; 40 - encapsulation layer; 50 - touch film assembly; 51 - driving electrode layer; 511 - driving electrode; 52 - induction electrode Electrode layer; 521-sensing electrode; 53-liquid crystal layer; 531-liquid crystal molecules; 532-first support column; 533-second support column; 541-first alignment layer; 542-second alignment layer; 60-color filter substrate; 61-packaging substrate; 62-color filter layer; 621-black matrix; 6211-pixel unit opening; 622-first color resist layer; 623-second color resist layer; 624-third color resist layer; 200-measurement and control circuit; 300-control module; X-first direction; Y-second direction; S-touch point area. DETAILED DESCRIPTION

[0057] The following describes the embodiments of the present application in detail with reference to the accompanying drawings.

[0058] In the following description, for the purpose of explanation rather than limitation, specific details such as specific system structures, interfaces, and technologies are provided to facilitate a thorough understanding of the present application.

[0059] The following will be combined with the drawings in the embodiments of this application to clearly and completely describe the technical solutions in the embodiments of this application. Obviously, the embodiments described are only part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0060] The terms "first," "second," and "third" in this application are used only for descriptive purposes and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first," "second," or "third" may explicitly or implicitly include at least one of such features. In the description of this application, "multiple" means at least two, for example, two, three, etc., unless otherwise specifically defined. All directional indications in the embodiments of this application (such as up, down, left, right, front, back...) are only used to explain the relative positional relationship, movement, etc. between the components under a specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indications also change accordingly. In addition, the terms "including" and "having," as well as any variations thereof, are intended to cover non-exclusive inclusions. For example, a process, method, system, product, or device that includes a series of steps or units is not limited to the listed steps or units, but may optionally include steps or units that are not listed, or may optionally include other steps or units that are inherent to these processes, methods, products, or devices.

[0061] References herein to "embodiments" mean that a particular feature, structure, or characteristic described in connection with the embodiments may be included in at least one embodiment of the present application. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor does it constitute an independent or alternative embodiment that is mutually exclusive of other embodiments. It is understood, both explicitly and implicitly, by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0062] The present application will be described in detail below with reference to the accompanying drawings and embodiments.

[0063] Please refer to Figures 1 and 2. Figure 1 is a schematic diagram of the structure of a display panel provided in one embodiment of the present application, and Figure 2 is a schematic diagram of the structure of a display panel provided in another embodiment of the present application. In this embodiment, a display panel 100 is provided. The display panel 100 is used to display images, and specifically can be an OLED display panel 100. The display panel 100 includes, from bottom to top, a driving substrate 10, a first electrode layer 21, a light-emitting layer 22, a second electrode layer 23, an encapsulation layer 40, a touch film assembly 50, and a color filter substrate 60, which are stacked in sequence along the light-emitting direction.

[0064] The drive substrate 10 includes a base substrate 11 and a pixel drive circuit layer 12 disposed on one side of the base substrate 11. The pixel drive circuit layer 12 is used to provide drive signals to the light-emitting units to display images. Specifically, a first electrode layer 21 is disposed on a side of the pixel drive circuit layer 12 away from the base substrate 11. The first electrode layer 21 includes a plurality of first electrodes 211 distributed in an array.

[0065] Furthermore, the display panel 100 also includes a pixel defining layer 30, which has a grid structure and has a plurality of pixel openings 31 distributed in an array, thereby separating the light-emitting layer 22 to be formed later and sealing it between the first electrode 211 and the second electrode 231. The pixel defining layer 30 can be formed by a photoresist material through processes such as photolithography or printing.

[0066] Specifically, a first electrode 211 is provided in each pixel opening 31, and a light-emitting layer 22 is filled in each pixel opening 31 and is in contact with the first electrode 211; the light-emitting layer 22 specifically includes a hole injection layer, a hole transport layer, an electroluminescent layer 22, a hole blocking layer, an electron transport layer, and an electron injection layer stacked, which can be formed specifically by a vapor deposition process.

[0067] Specifically, the second electrode layer 23 includes an integral second electrode 231, which is disposed on the light-emitting layer 22 and covers the light-emitting layer 22 and the pixel defining layer 30, thereby forming a light-emitting unit in each pixel opening 31 with the first electrode 211, the light-emitting layer 22, and the second electrode 231. The first electrode 211 and the second electrode 231 are respectively an anode and a cathode. Specifically, in other embodiments, the first electrode 211 and the second electrode 231 may also be swapped. The first electrode 211 and the second electrode 231 may be a transparent conductive material, such as a metal oxide such as indium tin oxide (ITO), indium zinc oxide (IZO), zinc oxide (ZnO), or indium gallium zinc oxide (IGZO). In this embodiment, ITO is preferred. The first electrode 211 and the second electrode 231 may be formed by patterning.

[0068] The encapsulation layer 40 is disposed on and covers the second electrode layer 23 to block external moisture and oxygen from entering the light-emitting layer 22, thereby preventing the intrusion of moisture and oxygen and thereby corroding the light-emitting layer 22 and affecting the display and the service life of the display panel 100. The encapsulation layer 40 can be made of silicon oxide, silicon nitride, or silicon oxynitride.

[0069] Furthermore, a touch film assembly 50 is disposed on a side of the encapsulation layer 40 away from the driving substrate 10 . That is, the touch film assembly 50 is disposed on the encapsulation layer 40 . The touch film assembly 50 includes a driving electrode layer 51 , a sensing electrode layer 52 , and a liquid crystal layer 53 disposed between the driving electrode layer 51 and the sensing electrode layer 52 , so as to realize the planar touch and force graded touch functions of the display panel 100 .

[0070] Please refer to Figure 3, which is a schematic diagram of the planar structure of the driving electrode layer and the sensing electrode layer provided in an embodiment of the present application. Specifically, the driving electrode layer 51 is arranged on the side of the packaging layer 40 away from the second electrode layer 23, and includes a plurality of driving electrodes 511 extending along the first direction X. The plurality of driving electrodes 511 are arranged at intervals. The specific shape of the driving electrode 511 can be set according to actual needs. For example, in this embodiment, it is set to a strip shape, or in other embodiments, each driving electrode 511 may include a plurality of connected sub-electrodes, and the sub-electrodes may be rectangular, diamond, circular, triangular or polygonal. In this embodiment of the present application, the first direction X and the second direction Y are defined to intersect. In this embodiment, the first direction X is the horizontal direction, the second direction Y is the vertical direction, and the plane where the first direction X and the second direction Y are located is parallel to the plane of the display area.

[0071] Specifically, the sensing electrode layer 52 is disposed on a side of the driving electrode layer 51 away from the encapsulation layer 40 and is insulated from the driving electrode layer 51. The sensing electrode layer 52 includes a plurality of sensing electrodes 521 extending along the second direction Y. The plurality of sensing electrodes 521 are spaced apart and are similar to the driving electrodes 511. The specific shape of the sensing electrodes 521 can be set according to actual needs. For example, in this embodiment, they are set in a strip shape. In other embodiments, each sensing electrode 521 may include a plurality of connected sub-electrodes. The sub-electrodes may be rectangular, diamond, circular, triangular, or polygonal in shape.

[0072] Specifically, the driving electrode layer 51 and the sensing electrode layer 52 are made of a transparent conductive material, such as metal oxides such as indium tin oxide (ITO), indium zinc oxide (IZO), zinc oxide (ZnO), and indium gallium zinc oxide (IGZO). In this embodiment, ITO is preferred. The driving electrode layer 51 and the sensing electrode layer 52 can be formed by patterning.

[0073] Specifically, a plane coordinate system is established with the first direction X as the x-axis, the second direction Y as the y-axis, and the intersection of the outermost sensing electrode 521 and the driving electrode 511 as the origin. During the touch phase, when a finger or touch element contacts the display panel 100, the capacitance between the finger and the sensing electrode layer 52 and the driving electrode layer 51 changes. By detecting this capacitance change, the specific sensing electrode 521 and the specific driving electrode 511 at the touch point are determined, and the point coordinates (x, y) of the touch point can be determined, thereby realizing the plane touch function of the display panel 100. Specifically, the touch film assembly 50 can be in mutual capacitance touch mode or self-capacitance touch mode, which can be set according to actual needs and is not specifically limited to this.

[0074] Furthermore, a liquid crystal layer 53 is provided between the driving electrode layer 51 and the sensing electrode layer 52. The thickness of the liquid crystal layer 53 can be set according to actual needs. In the embodiment of the present application, the liquid crystal layer 53 can be encapsulated by a One Drop Fill (ODF) process, which not only shortens the process time but also facilitates the thinning of the panel.

[0075] Please refer to Figure 4, which is a schematic diagram of the touch film assembly provided by one embodiment of the present application during the touch phase. Specifically, by disposing a liquid crystal layer 53 between the drive electrode layer 51 and the sense electrode layer 52, during the touch phase, when a finger or a touch control presses the panel, the color filter substrate 60 is pressed downward and deformed. The sense electrode layer 52 also deforms in response to the downward deformation of the color filter substrate 60. After the liquid crystal in the touch point area S is squeezed, the gaps between the liquid crystal molecules 531 become smaller, and the thickness of the liquid crystal layer 53 in this area decreases, causing the capacitance between the sense electrode 521 and the drive electrode 511 in this area to change. The change in the thickness of the liquid crystal layer 53 in the touch point area S is proportional to the touch force, that is, the change in the thickness of the liquid crystal layer 53 has a certain matching relationship with the touch force, thereby enabling the display panel 100 to recognize touches of different forces and achieve pressure grading recognition. As shown in the figure, the initial thickness of the liquid crystal layer 53 is d1. When a finger or touch panel is pressed, the thickness of the liquid crystal layer 53 in the local area at the pressed location changes to d2. The greater the touch force, the smaller the thickness of the liquid crystal layer 53 in the local area at the pressed location, and the greater the thickness change, the greater the capacitance change between the sensing electrode 521 and the driving electrode 511 at the touch point. Therefore, the capacitance change between the sensing electrode 521 and the driving electrode 511 at the touch point is proportional to the touch force. The touch force can be obtained by detecting the capacitance change and then based on the functional relationship between the capacitance change and the touch force, thereby realizing force graded recognition.

[0076] In this embodiment, the touch film assembly 50 is positioned between the encapsulation layer 40 and the color filter substrate 60, allowing it to be embedded within the display panel 100. Furthermore, the color filter substrate 60 and the lower substrate 101 can be bonded together using a bonding process, eliminating the need for low-temperature processes. This significantly reduces the range of material options and material costs, facilitating a lightweight and thin design for the display panel 100 and reducing costs. Furthermore, by positioning the liquid crystal layer 53 between the sensing electrode layer 52 and the driving electrode layer 51, both flat touch and force-graded touch functions can be achieved. The provision of the liquid crystal layer 53 also maintains optical efficiency, preventing light reflections within the panel from affecting the display, minimizing light loss and ensuring a superior display quality.

[0077] Furthermore, as shown in Figures 1 and 2, the touch film assembly 50 also includes a first alignment layer 541 and a second alignment layer 542. The first alignment layer 541 is disposed on the side of the drive electrode layer 51 away from the encapsulation layer 40, and the second alignment layer 542 is disposed on the side of the sensing electrode layer 52 closer to the liquid crystal layer 53. That is, the first alignment layer 541 and the second alignment layer 542 are disposed on opposite sides of the liquid crystal layer 53, respectively. This allows the liquid crystal molecules 531 in the liquid crystal layer 53 to be arranged in an orderly manner, thereby improving display brightness and contrast and avoiding the problem of a decrease in display quality caused by the disorder of the liquid crystal molecules 531 in the liquid crystal layer 53. Furthermore, to prevent the liquid crystal molecules 531 from being polarized due to long-term exposure to the electric field formed by the drive electrode layer 51 and the sensing electrode layer 52, the polarity of the liquid crystal molecules 531 can be reversed by the drive electrode layer 51 and the sensing electrode layer 52.

[0078] Furthermore, the liquid crystal layer 53 also includes support columns, which are arranged between the driving electrode layer 51 and the sensing electrode layer 52. The support columns are used to support the film layers on opposite sides of the liquid crystal layer 53. This prevents the display panel 100 from being subjected to external forces for a long time, which may cause the sensing electrode layer 52 and the driving electrode layer 51 to become uneven. This may cause the capacitance between the driving electrode 511 and the sensing electrode 521 to change, resulting in touch recognition misjudgment or touch recognition failure, thereby improving the stability of touch recognition.

[0079] Specifically, the support columns include a first support column 532 and a second support column 533 of different heights. The opposing ends of the first support column 532 abut the drive electrode layer 51 and the sensing electrode layer 52, respectively. The second support column 533 is disposed on the side of the drive electrode layer 51 away from the encapsulation layer 40. The second support column 533 is smaller than the second support column. The second support column 533 is located between adjacent first support columns 532, ensuring a more balanced support effect. Furthermore, the provision of the first and second support columns 532, 533, can block the flow of liquid crystal, reducing its flow rate and thereby reducing the intensity of water ripples and improving the display quality of the display panel 100. Furthermore, the support columns are disposed in the area corresponding to the pixel defining layer 30, thereby reducing their impact on light and maintaining the display quality. In other embodiments, the support columns can also be disposed on the color filter substrate 60 and have an inverted trapezoidal shape in longitudinal cross-section. The specific configuration can be determined based on actual needs and production conditions. This is not a specific limitation and can be configured as needed.

[0080] Please refer to Figure 5, which is a schematic diagram of the structure of a display panel provided in a third embodiment of the present application. In this embodiment, support columns are disposed between the drive electrode layer 51 and the sensing electrode layer 52. The support columns include a first support column 532 and a second support column 533. The first support column 532 has opposite ends abutting the drive electrode layer 51 and the sensing electrode layer 52, respectively. The second support column 533 is disposed on the side of the drive electrode layer 51 away from the encapsulation layer 40, and the height of the second support column 533 is less than that of the first support column 532. The specific structure and function of the first support column 532 and the second support column 533 are the same or similar to those of the above embodiments, and can achieve the same technical effects. For details, please refer to the above description and will not be repeated here.

[0081] Different from the above embodiment, in this embodiment, the first alignment layer 541 and the second alignment layer 542 are not set on the opposite sides of the liquid crystal layer 53. The liquid crystal molecules in the liquid crystal layer 53 use self-aligned liquid crystal molecules, so that the pre-tilt angles of the liquid crystal molecules in the liquid crystal layer 53 remain consistent, so as to improve the light transmittance and meet the viewing angle requirements of the display panel 100.

[0082] As shown in FIG1 , in this embodiment, the color filter substrate 60 includes a packaging substrate 61 and a color filter layer 62. The color filter layer 62 is disposed between the packaging substrate 61 and the sensing electrode layer 52. The color filter layer 62 specifically includes a black matrix 621, a first color resist layer 622, a second color resist layer 623, and a third color resist layer 624. The black matrix 621 has a plurality of pixel unit openings 6211 arranged in a matrix. The pixel unit openings 6211 overlap with the pixel openings 31 formed by the pixel defining layer 30 in a direction perpendicular to the display panel 100 to ensure that light from each light-emitting unit can be emitted through the pixel unit openings 6211. Specifically, the first color resist layer 622, the second color resist layer 623 and the third color resist layer 624 are respectively filled in the pixel unit opening 6211 in a preset order. The first color resist layer 622, the second color resist layer 623 and the third color resist layer 624 are photoresist materials of different colors. For example, the first color resist layer 622, the second color resist layer 623 and the third color resist layer 624 are red, green and blue respectively, thereby realizing full-color display.

[0083] As shown in FIG2 , in this embodiment, unlike the embodiment of FIG1 , the color filter substrate 60 in this embodiment is not provided with a color resist layer, but the light-emitting layer 22 includes a first light-emitting layer 221, a second light-emitting layer 222 and a third light-emitting layer 223 of different colors, thereby forming a first light-emitting unit, a second light-emitting unit and a third light-emitting unit of different colors. The first light-emitting unit, the second light-emitting unit and the third light-emitting unit are red, green and blue, respectively, and are arranged in a preset order, thereby realizing full-color display, which can further reduce the number of film layers, and is conducive to the thinness of the display panel 100.

[0084] In the embodiment of the present application, by placing the touch film assembly 50 between the color filter substrate 60 and the encapsulation layer 40, not only can plane recognition and force-grading recognition be integrated, but the touch film assembly 50 can also be embedded within the display panel 100, which facilitates the thinning and lightweight design of the display panel 100. Furthermore, because the color filter substrate 60 is manufactured using a bonding process, there are no low-temperature process restrictions, which significantly reduces the range of material options and material costs, thus contributing to cost reduction. Specifically, the manufacturing process of the display panel 100 is described in detail below.

[0085] Please refer to FIG6 , which is a schematic flow chart of a method for manufacturing a display panel according to an embodiment of the present application. In this embodiment, a method for manufacturing a display panel is provided for manufacturing the display panel 100 involved in the above embodiment, and the method comprises:

[0086] S10: providing a driving substrate 10;

[0087] S20: forming a first electrode layer 21, a light-emitting layer 22, a second electrode layer 23 and an encapsulation layer 40 in sequence on the driving substrate 10;

[0088] S30: manufacturing a driving electrode layer 51 on the packaging layer 40 to form a lower substrate 101;

[0089] S40: providing a color filter substrate 60;

[0090] S50: forming a sensing electrode layer 52 on the color filter substrate 60 to form an upper substrate 102;

[0091] S60: coating liquid crystal on the side of the driving electrode layer 51 away from the encapsulation layer 40 or the side of the sensing electrode layer 52 away from the color filter substrate 60 to form a liquid crystal layer 53;

[0092] S70 : aligning the upper substrate 102 and the lower substrate 101 so that the liquid crystal layer 53 is located between the driving electrode layer 51 and the sensing electrode layer 52 .

[0093] In this embodiment, steps S10, S20, and S30 are used to form a lower substrate 101, i.e., the light-emitting substrate of the OLED. The driving electrode layer 51 of the touch film assembly 50 is formed on the encapsulation layer 40 of the lower substrate 101. Steps S40 and S50 are used to form an upper substrate 102, and the sensing electrode layer 52 of the touch film assembly 50 is formed on the upper substrate 102. Then, liquid crystal is coated on the upper substrate 102 to form a liquid crystal layer 53, or liquid crystal is coated on the upper substrate 102 to form the liquid crystal layer 53. The upper substrate 102 and the lower substrate 101 are then attached to form a cell, so that the liquid crystal layer 53 is located between the driving electrode layer 51 and the sensing electrode layer 52. The liquid crystal layer 53 is combined with the driving electrode layer 51 and the sensing electrode layer 52 to form the touch film assembly 50. During the touch phase, the sensing electrode layer 52 deforms as the color filter substrate 60 is pressed downward, causing the thickness of the liquid crystal layer 53 in the touch point area S to decrease. The thickness change is proportional to the touch force in the touch point area S, thereby causing the capacitance change between the sensing electrode 521 and the driving electrode 511 at the touch point to be proportional to the touch force. The touch force can be determined by detecting the capacitance change and then based on the functional relationship between the capacitance change and the touch force, thereby achieving force grading recognition.

[0094] In this embodiment, a driving electrode layer 51 is formed on a lower substrate 101, and a sensing electrode layer 52 is formed on an upper substrate 102. Then, liquid crystal is dripped onto the upper substrate 102 or the lower substrate 101 using an ODF process. The upper substrate 102 and the lower substrate 101 are then affixed to form a cell. Thus, the liquid crystal layer 53 is combined with the driving electrode layer 51 and the sensing electrode layer 52 to form a touch film group 50. The touch film group 50 is embedded in the panel, which not only realizes planar touch recognition and force-graded touch recognition, but also contributes to the lightweight design and cost reduction of the display panel 100.

[0095] Please refer to Figures 7 and 8. Figure 7 is a schematic flow chart of a method for preparing a lower substrate provided in one embodiment of the present application, and Figure 8 is a flow chart of the preparation process of the lower substrate corresponding to the embodiment of Figure 6. In this embodiment, the preparation method of the lower substrate 101 includes:

[0096] S10: providing a driving substrate 10;

[0097] S20: forming a first electrode layer 21, a light-emitting layer 22, a second electrode layer 23 and an encapsulation layer 40 in sequence on the driving substrate 10;

[0098] S31: depositing a first transparent conductive layer on the encapsulation layer 40;

[0099] S32: patterning the first transparent conductive layer to form a plurality of driving electrodes 511 extending along the first direction X;

[0100] S33: forming a first alignment layer 541 on the driving electrode layer 51;

[0101] S34 : manufacturing support pillars on the first alignment layer 541 to form the lower substrate 101 .

[0102] Among them, the specific structure and function of the drive substrate 10 provided in step S10 are the same or similar to the specific structure and function of the drive substrate 10 involved in the above embodiment, and can achieve the same technical effect; the specific structure and function of the first electrode layer 21, pixel defining layer 30, light-emitting layer 22, second electrode layer 23 and encapsulation layer 40 formed in step S20 are the same or similar to the specific structure and function of the first electrode layer 21, pixel defining layer 30, light-emitting layer 22, second electrode layer 23 and encapsulation layer 40 involved in the above embodiment, and can achieve the same technical effect. For details, please refer to the detailed description above and will not be repeated here. Through the above steps, a drive electrode layer 51 and a first alignment layer 541 can be formed on the lower substrate 101. The first alignment layer 541 is used to pre-align the liquid crystal layer 53 so that the liquid crystal molecules 531 close to the lower substrate 101 are arranged in an orderly manner. Specifically, the first transparent conductive layer can be patterned by a photolithography process or a printing process to form a plurality of drive electrodes 511 extending along the first direction X.

[0103] Please refer to Figures 9 and 10. Figure 9 is a schematic flow chart of a method for preparing an upper substrate provided in one embodiment of the present application, and Figure 10 is a flow chart of the preparation process of the upper substrate corresponding to the embodiment of Figure 9. In this embodiment, the preparation method of the upper substrate 102 includes:

[0104] S40: providing a color filter substrate 60;

[0105] S51: depositing a second transparent conductive layer on the color filter substrate 60;

[0106] S52: patterning the second transparent conductive layer to form a plurality of sensing electrodes 521 extending along the second direction Y;

[0107] S53 : forming a second alignment layer 542 on the sensing electrode layer 52 .

[0108] The specific structure and function of the color filter substrate 60 provided in step S40 are identical or similar to those of the color filter substrate 60 described in the above embodiments, and can achieve the same technical effects. For details, please refer to the detailed description above and will not be repeated here. Through the above steps, a sensing electrode layer 52 and a second alignment layer 542 are formed on the upper substrate 102. The second alignment layer 542 is used to pre-align the liquid crystal layer 53 to orderly align the liquid crystal molecules 531 near the upper substrate 102. Specifically, the second transparent conductive layer can be patterned using a photolithography process or a printing process to form a plurality of sensing electrodes 521 extending along the second direction Y.

[0109] Please refer to Figure 11, which is a schematic diagram of the process flow of aligning the upper substrate and the lower substrate provided in one embodiment of the present application. In this embodiment, liquid crystal is dripped onto the upper substrate 102 to form a liquid crystal layer 53, and then the lower substrate 101 and the upper substrate 102 are glued together to form a box, so that the liquid crystal layer 53 is encapsulated between the driving electrode layer 51 and the sensing electrode layer 52 to form the touch film group 50 involved in the above embodiment. In this embodiment, since the support column is formed on the lower substrate 101, dripping the liquid crystal onto the upper substrate 102 is conducive to the flow of liquid crystal, thereby making the distribution of the liquid crystal layer 53 more uniform, thereby improving the quality of the touch film group 50 and the display effect of the display panel 100. It is easy to understand that in other embodiments, if the support column is formed on the upper substrate 102, the liquid crystal can be dripped onto the lower substrate 101.

[0110] Through the above-described embodiment, the color filter substrate 60 utilizes a bonding process, eliminating the limitations of low-temperature processes. This significantly reduces the range of material options and material costs, thereby effectively lowering production costs. Furthermore, the touch film assembly 50 can be embedded within the display panel 100, facilitating a thinner and lighter design for the display panel 100. Through the ODF bonding process, the liquid crystal layer 53 is encapsulated between the sensing electrode layer 52 and the driving electrode layer 51, enabling force-grading recognition, further diversifying the panel's touch functionality. Furthermore, the integration of flat touch and force-grading touch improves touch integration.

[0111] Please refer to Figure 12, which is a schematic diagram of the structure of a display device provided in an embodiment of the present application. In this embodiment, a display device is provided, which includes a display panel 100, a measurement and control circuit 200, and a control module 300.

[0112] The display panel 100 is the display panel 100 described in the above embodiments, and is manufactured using the manufacturing method provided in the above embodiments. The specific structure and manufacturing method of the display panel 100 are described in detail above and will not be repeated here. The display panel 100 includes the touch film assembly 50 described above, enabling planar touch recognition and touch force graded recognition functions.

[0113] Specifically, the measurement and control circuit 200 is electrically connected to the driving electrode layer 51 and the sensing electrode layer 52 in the touch film group 50. Each driving electrode 511 in the driving electrode layer 51 is electrically connected to the measurement and control circuit 200 through a signal line, and each sensing electrode 521 in the sensing electrode layer 52 is also electrically connected to the measurement and control circuit 200 through a signal line, so that the measurement and control circuit 200 can identify the touch point and touch force.

[0114] Furthermore, the control module 300 is electrically connected to the measurement and control circuit 200 and the display panel 100. During the operation phase of the display panel 100, the control module 300 provides a touch scanning signal to the measurement and control circuit 200. The measurement and control circuit 200 periodically detects the touch film assembly 50 based on the touch scanning signal to identify the touch point and the touch force level on the display panel 100 and generate a corresponding touch signal. The control module 300 receives and processes the touch signal from the measurement and control circuit 200, generates a drive signal, and outputs the drive signal to the display panel 100, causing the display panel 100 to display the corresponding image. Specifically, the measurement and control circuit 200 generates a touch signal corresponding to the coordinate information of the touch point and the touch force level. The control module 300 performs corresponding calculations based on the touch signal, generates a drive signal, and outputs it to the display panel 100, causing the display panel 100 to display the image corresponding to the corresponding information after the touch action.

[0115] In this embodiment, through the above-mentioned setting, the display panel 100 can embed the touch film group 50 into the interior of the display panel 100, which is beneficial to the lightweight design and cost reduction of the display panel 100; at the same time, it can also realize the recognition of plane touch and force graded touch, making the function of the display panel 100 richer to meet the user's higher usage requirements; further, through the measurement and control circuit 200 and the control module 300, it can respond to the touch action and display the image corresponding to the response information after the touch action to realize the plane touch function and force graded touch function.

[0116] The above is only an implementation method of the present application and does not limit the scope of patent protection of the present application. Any equivalent structure or equivalent process transformation made using the contents of the description and drawings of this application, or directly or indirectly applied in other related technical fields, are also included in the scope of patent protection of the present application.

Claims

1. A display panel, comprising: Driver substrate; A first electrode layer is disposed on one side of the driving substrate; A second electrode layer is disposed on a side of the first electrode layer away from the driving substrate; A light-emitting layer is disposed between the first electrode layer and the second electrode layer; an encapsulation layer, disposed on the second electrode layer and covering the second electrode layer; Wherein, the display panel further comprises a color film substrate and a touch film group, the touch film group is arranged on a side of the encapsulation layer away from the driving substrate, and the color film substrate is arranged on a side of the touch film group away from the encapsulation layer; The touch film set comprises: A driving electrode layer, arranged on a side of the packaging layer away from the second electrode layer; The sensing electrode layer is arranged on a side of the driving electrode layer away from the packaging layer and is insulated from the driving electrode layer; The liquid crystal layer is arranged between the driving electrode layer and the sensing electrode layer; in the touch stage, the sensing electrode layer is deformed as the color film substrate is pressed downward, so that the thickness of the liquid crystal layer in the touch point area becomes smaller, and the thickness change is proportional to the touch force of the touch point area.

2. The display panel according to claim 1, wherein: The thickness variation of the liquid crystal layer has a certain matching relationship with the touch force.

3. The display panel according to claim 1, wherein: The touch film assembly further includes a first alignment layer and a second alignment layer. The first alignment layer is disposed on a side of the driving electrode layer away from the encapsulation layer, and the second alignment layer is disposed on a side of the sensing electrode layer close to the liquid crystal layer.

4. The display panel according to claim 3, wherein: The driving electrode layer and the sensing electrode layer are also used to reverse the polarity of liquid crystal molecules in the liquid crystal layer.

5. The display panel according to claim 1, wherein: The liquid crystal molecules in the liquid crystal layer are self-aligned liquid crystal molecules.

6. The display panel according to claim 1, wherein: The color filter substrate comprises a packaging substrate and a color filter layer, and the color filter layer is arranged between the packaging substrate and the sensing electrode layer.

7. The display panel according to claim 1, wherein: The touch film group is of mutual capacitance touch mode or self capacitance touch mode, the driving electrode layer includes a plurality of driving electrodes extending along a first direction, the sensing electrode layer includes a plurality of sensing electrodes extending along a second direction, and the first direction intersects with the second direction.

8. The display panel according to claim 7, wherein: Each of the driving electrodes comprises a plurality of connected driving sub-electrodes, and the driving sub-electrodes are in a rectangular, rhombus, circular, triangular or polygonal shape; Each of the sensing electrodes includes a plurality of connected sensing sub-electrodes, and the shape of the sensing sub-electrodes is rectangular, rhombus, circular, triangular or polygonal.

9. The display panel according to claim 1, wherein: The liquid crystal layer further includes a support column, which is disposed between the driving electrode layer and the sensing electrode layer. The support column includes a first support column and a second support column, wherein opposite ends of the first support column are respectively abutted against the driving electrode layer and the sensing electrode layer, and the second support column is disposed on a side of the driving electrode layer away from the encapsulation layer, and a height of the second support column is less than a height of the first support column.

10. The display panel according to claim 9, wherein: The second supporting pillars are located between adjacent first supporting pillars.

11. The display panel according to claim 9, wherein: The display panel further comprises a pixel defining layer, wherein the pixel defining layer has a plurality of pixel openings distributed in an array so as to separate the light emitting layers; and the supporting column is arranged in an area corresponding to the pixel defining layer.

12. The display panel according to claim 1, wherein: The driving electrode layer and the sensing electrode layer are made of transparent conductive material.

13. A method for preparing a display panel, wherein: include: Providing a drive substrate; Sequentially forming a first electrode layer, a light-emitting layer, a second electrode layer and a packaging layer on the driving substrate; Manufacturing a driving electrode layer on the packaging layer to form a lower substrate; Provide color film substrate; Manufacturing a sensing electrode layer on the color filter substrate to form an upper substrate; coating liquid crystal on a side of the driving electrode layer away from the encapsulation layer or a side of the sensing electrode layer away from the color filter substrate to form a liquid crystal layer; Aligning the upper substrate and the lower substrate so that the liquid crystal layer is located between the driving electrode layer and the sensing electrode layer; In the touch stage, the sensing electrode layer deforms as the color film substrate is pressed downward, so that the thickness of the liquid crystal layer in the touch point area becomes smaller, and the thickness change is proportional to the touch force of the touch point area.

14. The preparation method according to claim 13, wherein: After the step of manufacturing the driving electrode layer on the packaging layer, the method further includes: forming a first alignment layer on the driving electrode layer; After the step of manufacturing the sensing electrode layer on the color filter substrate, the method further includes: A second alignment layer is fabricated on the sensing electrode layer.

15. The preparation method according to claim 13, wherein: The step of manufacturing a driving electrode layer on the packaging layer comprises: depositing a first transparent conductive layer on the encapsulation layer; patterning the first transparent conductive layer to form a plurality of driving electrodes extending along a first direction; The step of manufacturing a sensing electrode layer on the color filter substrate comprises: depositing a second transparent conductive layer on the color film substrate; The second transparent conductive layer is patterned to form a plurality of sensing electrodes extending along a second direction; wherein the second direction intersects with the first direction.

16. A display device, wherein: include: A display panel for displaying an image, wherein the display panel is the display panel according to claim 1, and the display panel is manufactured by the manufacturing method according to claim 13; The measurement and control circuit is electrically connected to the driving electrode layer and the sensing electrode layer, and is used to realize the functions of identifying plane touch and force touch.

17. The display device according to claim 16, wherein: Each driving electrode in the driving electrode layer is electrically connected to the measurement and control circuit through a signal line, and each sensing electrode in the sensing electrode layer is electrically connected to the measurement and control circuit through a signal line; In the touch control stage, the measurement and control circuit is used to detect the capacitance change between the sensing electrode and the driving electrode, and obtain the touch force level according to the functional relationship between the capacitance change and the touch force.

18. The display device according to claim 16, wherein: The display device also includes a control module, which is electrically connected to the measurement and control circuit and the display panel. The control module is used to receive and process the touch signal of the measurement and control circuit, generate a drive signal, and output the drive signal to the display panel so that the display panel displays a corresponding image.

19. The display device according to claim 18, wherein: The control module is further used to provide a touch scan signal to the measurement and control circuit, and the measurement and control circuit is used to periodically detect the touch film group according to the touch scan signal and generate the touch signal.

20. The display device according to claim 19, wherein: The touch signal includes coordinate information of the touch point and information of the touch force level.

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